FAST DL Richard Wilkens THE IDEA THAT should enter 1975 US Nats came Charlie Johnson Gary Frost met British Nats May 1975 already booked peaceful hitchhike tour little old country yours Charlie suggested should visit him Cali fornia before Nats boxed five FAI Blastas left over British Interna tional headed West Charlie Lorna gave plenty advice Fast Com bat hadnt would have doubtful could have entered Nats scaled up 400 sq FAT Blasta California result now consider ably improved appears article original after having miraculously sur vived two mid-air collisions scoring lucky kill second round smashed during fly-off match 5th place against Greg Hissem flying bit too well Editors Note Keep mind flying Fast rules new experience Wilkens comparable US modeler flying FAT rules interna tional competition Compared Fast ships chaps used seeing huge flat-section wing makes flight mula manuals curl up edges dis covered 1965 Britain since 99% British models have used type section advantages models go together extremely quickly cause selfjigging can built flat building board easy repair motor mounts tips tails can reused model gets smashed structure makes easy model formed two broken ones has fewer components its US cousin very few precision fits required during assembly Blasta expanded polystyrene lead ing edge tips 1975 invention worlds respected FAI combat fliers adapts famous Blasta American Fast Combat rules allows mass produce very cheaply identical reusable/replaceable components crushed LE example can cut off replaced field tween matches one-piece tips copy wing section taper produce liftproducing section beyond 36-in balsa frame Tips like may made wing section fitted model thus increasing its aspect ratio reducing induced drag wing may also hollowed out hot knife make super light Britain contest held week between March October country about size Illinois no has far travel Everyone enters contests possible limiting factor ing quickly can replenish stock models US structures thus totally impractical over take too long build Vampires Shrika IIs excepted Because fliers meet nearly week some often take two three differ ent size models along contest may select fly against par ticular opponent hoping out turn model small amount about same speedperhaps bit slower correct selection model rather like expert fisherman selecting right bait certain fish certain river no such thing universal worm beats fish universal combat model beats others another great advantage flat-section wing comes because constructional system allows variation overnight chord therefore area favorite design plastic tip jig can used out modification moving block plastic reduce length tip dur ing cutting As soon someone makes curved wing section problem lot difficult solve screws up airfoil percentages Having never flown Fast Combat fore sizing Fast version shot dark CG bit too far back -oz prop nut fitted Nats model bringing its weight up 19 Top Try Wilkie saying Weighing less 18 oz has wing/loading equivalent Nemesis Turns about 86 loops per minute Left Cardboard rocket tube can substi tuted pacifier pod shown Leading edge cut back spar locating mount January 1977 25 Fast Blasta oz for 460 sq model hol lowed out LE thicker spar web hollowed-out ribs center rib shown has lighter trail ing edge no full-span spruce thinner spar web selecting wood care fully weighs 17 oz further half oz could saved hollowing out thing could try trimming inch off front ribs reduce area speed speed turns still retain advantages structure turns about 86 loops per min ute 10% Nitro 9 X 6 Punchello wood orbits 107 mph level using British 3-strand CL wire motor 8-yearold Supertigre G21/35 modified model has wing loading equiva lent 127 oz Nemisis complete motor ready fly can imagine tight will turn have im agine because cannot build light get some idea its turn capa bility loops about two-thirds diam eter regular 330 sq hot ship lot fun fly interesting combat rules general opinion no substitute cubic inches brute horsepower over rules no substitute square inches few optional modifications model shown plan As life expectancy model between 10 seconds 5 minutes actual combat time solo flying opponents motor will start may want build 3/t-in wide center rib no ply cap strips cut lumps out plastic tips LE spar web ribs center rib etc Still use ers run out ply bearer strengthener use favorite card board roll instead pacifier pod shown want longer tube shift first outboard rib over bit will notice difference model flying have built six models con test two have great three have OK has useless usually due small CG upsets caused wood weight varying model model Plastic doesnt vary spruce varies little balsa varies lot further CG varies greater CG upset build Blastas batches four can cut balsa stripper shown plan four trailing edges 4 X As X 36 sheet set ribs 1/g X 3 sheet ribs too far CG four tails 4 X /8 X 36 sheet Models have similar weight distribution better still motor Expanded polystyrene L E tips permit mass production cheap reusable/replaceable components Top Start L E cut Middle First cut complete Left Leading edge com pletefour models buildable week 26 Model Aviation Above Cutting large slab plastic right size longer hot wire Note guides bat tery tapped 68 1OV Right T B Ready Cut tips Tip being cut 2 pix Tip finished about 20 seconds mount put last after model has covered motor position adjusted before fixing correct CG obtained model Also live very windy area States can stick motor mount l2O side-thrust extra line tension up wind Line tension another point considered because model loops tighter average centrifugal force reduced line whip increases inboard wing 2 inches longer outboard wing help solve prob lem because makes model tend roll out pilot flight attitudes Analyzing structure purpose leading-edge two-fold 1 has separate airflow front wing 2 must prevent wings clapping hands model does ioop polystyrene part cut hot wire simple jig method allows de sign own particular LE shape different wing thicknesses spar made three parts web /s-in balsa two spruce flanges resists bending shear forces imposed LE flight bending stress spar greatest wing root Therefore spruce flanges resist bending stresses taper root Vs X Y8 tips A-in sheet balsa web sized resist shear forces maximum tips cut same balsa stripper used cut ribs Another strip per used cut trailing edges yet another employed cut center rib build strippers push knife blade through lump /2 X 2 X 2/2 balsa point blade protrudes dis tance equal thickness wood intend cut epoxy place Epoxy scrap piece /s X hard balsa spruce distance blade tip equal width strip required slight diverging angle blade cutting direction angle makes sure blade does wan der sheet being stripped cut -in-thick balsa sheet mount blade January1977 27 -in protrusion cut side -in sheet Add Sello tape similar reduce friction strippers very easy make strips cut secondsall exactly same size polystyrene foam LE cut hot wire made piece old controlline wire heated 12V car battery Both 3- 7-strand Laystraight CL wire available Britain has used successfully see no reason scrap length 018 line cannot used 12V makes wire too hot can modify battery tap off 6 8 IOV required Obviously commercial expanded polystyrene wing cutter available model shops better outfit ex pensive Blasta leading edges up now have heen cut homemade ar rangement Build LE cutting jig shown plan -in ply blockboard chiphoard make sure distance tween 1/32-in ply LE templates 19 base Z plate should 11 ate between LE tem plates 1 e Y foam sits 9 X 22 X between two plates d tip jig making sure 1/16 ply wing section template cen terline same distance above base plate 1/16-in hole through ost post can lump engine bearer Tie another piece control-line wire /8-in ply hot-wire T handle pass through post hole tie post Get some cheap electrical flex suitable bedside lamps etc join end hot wire battery About 8 volts should enough cut tips section template should 1/32 bigger around wing section required width ply LE cutting tem plate shown plan LE hot wire frame made X 1 soft pine upright arm H frame made pivot fixing cross member single screw nail bolt Knock nail top bot tom uprights Tie CL hot wire bottom two nails elastic between top pair tension wire elec tric flex about 6 ft used connect end hot wire battery screws cutter ready use Expanded polystyrene available country insulation contractors lo cated checking phone book will probably available 8 X 4 eets enough last year two Cut block 18 x 12 X 2 lay LE jig between templates practice cutting probably best cut down wards side templates gives better shape cut tips lay hot wire base plate behind template mounting post place 4 X 11 X 2 block against wing section template Run hot wire round template pulling time gently wire keep taut hesitate stop anywhere otherwise FASTaLASTA mDaYMOdW WLKENJ Shoot hobo 000 onootw 800 tp 3on4 w00d tn*obw 0m td00 ot.00 0000 nooton nonot000 otozIij noaonboIo0oo. b00 I0LEotIon t no tong 0000 on 001 thoonhnotd noo woo -Optonwt to0owod fi b000 0 900Ot ~o80oott b0onob Iwhq oopatooon hothod L 2 Towbog odgo donf boo onnoowit 000000 pI pbotofiono.0n0Ob __________Li Enpo boonon oooon00y onnotnootton0totOO oonoit000000gpgNALLE 4oott O anot w**on dy nito tonSSr35 Con 0000 no00110 ton LI] oofltg b0on otooP7 0th 0opay ononoononnt st-i Oqoonooglo ffrConto owotion ofrootiti 0 oott 0000- Zonqit Tqo*O00Wq - ton dw00L[T ibdnwbwwodo l -PoOIOon tonb IdfonlOowod tm 34 1n Eloblo twonon hd00 wobon -Ahod,obonth itobon 23 22 ISO 1oonbottony Pt ton0Iotodonononi X plot nwonobo b 000 nob 4Eho1 ton ST Ost 58 olonob 0 p1000 0ho0 000 ob Enwot pOditwo 100th 7 onEt hobo 2nqkwd00*1010I t hdt KooOo towikon oton 000 %obloopoon nontro ootnn3oaonnolo niton on0010 1ooply boiwonk ion ob*onwi -tdOTE LEoontonono ion 0000 nob 0000 nonnE 0 0oott 000000000000 000000t TopIon ply ono 00np on0 00 000000 towo 000 000* ro-notonownont 0*0 000000 WinO o00 000 tot oft ototog 0000000 *00w. 000 ooottod OpOonlolTE totnh onowoqo 0 0000 0 t b000 p000000 pOd 2oqbod Solontknon two toning ModIfy No 510 non, 00dm Sddqoo WnoOqtottO tW IolobtopS ton p00000BbotOon 28 Model Aviation Fl Eooqtoot0 /tboon SootnTE i ottod 30000 O00 10 0d.p 0 ton t odotkotfn000t 0opltn groove will melted surface tipwhich does matter much unless leading edge Once wire has pulled right round template move plastic forward about 1 lift block up away jig tip will fall out block will take long cut enough five ten models after experimenting bit different voltages wont cost much either model like others will prob ably break hits ground spruce center-section strengtheners stop abruptly along leading trailing edges attempt encourage wing snap points repairs easy instead next center rib may like encourage break notching TE points must point out however idea no proof will work should able make both jigs convert battery experiment bplyooototboodK plyooolokbodteoley e 000 oertdOhOt0t Ik-Soolto 7 I. gdeoe P0 Optod holbeed OOt p 5 OOly pO0teo pod olg Oqed khdlo hole doot hole 10 lb poeltoe edOptloeol Ighteleeg 1000 kotid 100g ot tot tho loWO Ore rO ototeeootoO5oOV eyoo Ipem eeerdttd eye Ioeg tot tt eev different voltages cut enough leading edge section tips four models couple evenings Once rib template balsa strippers engine bearer drill ing jig have made ready mass production Construction Make sign saying model am taking hours construct may last 10 seconds combat Now make another saying model 60 ft away flying 100 mph engaged combat will notice effect extra work Pin up above workbench remind spend time fiddling about silly details will assume going make four models combat next weekend Monday evening have already built jigs templates have pile tips LE sections Grab very light X 4 X 36 balsa sheet mark rib positions right across over plan using square trailing edge stripper strip four strips razor-plane chamfer rear /4 trailing edge sharp point leaving center section square meets tail plane Cut four 9 X / X ce strips 36-in length white glue Sellotape fix trailing edge position shown plan Sellotape holds spruce position glue drying bother remove tape read sign 2 Mark rib positions two 3 X 1/i X 36 sheets balsa strip 1/2-in strips rib stripper four strips become spar webs Strip four 3 X /i X 36 sheets down middle same stripper 9-inlong rib template laid top strips cut rib tapers TE notch Use template mark front rib Remove template place small metal square strip cut rib free simple perfectly accurate cross cut Only 31 go Take two /s X /s spruce strips hack taper end both measure /i square tips glue webs white glue epoxy clamping about 20 spring clothes pins like can set about 1/64 edges web save having get perfect edge alignment Fit two /i X /8 centersection reinforcing spruce strips other side web set aside dry Modify No 5 rib front fit web same other three spars Cut balsa center rib center rib stripper Cut tapers crank mount holes TE tail notches center rib 12 long continued page 9] January 1977 29 31h I. 2 jeokee oP otttoeoketloedeg ge - PIOokOtOooOo Ootteg pg e0g hod reh Wilkens left Frank Smart holding two FAI planes just show big much Fast Blasta like Airfoil plans left self jigging flies very well Lhooflleg -be 2eqked Shereshaws beautiful big cabin machine Gene has 24 ready go Shortly will shipping parts kits Dallaire Sportster won RC Antique 76 SAM Champs Trenton Ter ror Miss America beautiful sevenfoot Buccaneer Super Buccaneer oldies goodies biggies Postscripts will end up months column bi-monthly plea puts readers Next column will report results Scotty Mur ray Memorial Annual Pensacola Although home still Pensa cola am working Washington DC Please address correspondence Jack Bolton 8W7 Ferncl CL Spring field VA 22153 phone 703 455-3089 please include SASE Fast Blasta/Wilkens continued page 29 yougetsixoutofa3 X sheet Cut 1/32 ply cap strips top incorporates pushrod slot White glue Sellotape again Tuesday Cut A-in ply crank mounts drill crank bolt holes suit 3-in belicrank mounting bolts British Micromold 3 nylon crank shown plan crank can used use pushrod hole nearest bolt Insert crank bolts add cranks leadouts pushrods Make Z-bend 1/16 music wire prevent falling out crank Cut out four delta tails 4 X 36 X /s soft balsa sheet extend front tail adding 1 X /i balsa strip tail use 5-in sheet can buy Cut Y8-in soft balsa elevators round off edges sandpaper No fancy airfoilsread signs tailplane flat edge table elevator right angles down over table edge stick top I-in wide Sellotape hinge pressing tape crack Turn lot over repeat operation Bend elevator up down dozen times check hinge OK cover side tail elevator single piece Fascal Solarfilm again elevator right angles tail Turn over re peat Number ribs cut leadout holes Use white glue Hot Stuff assembly components except LEs tips may fixed Hot Stuff First stick ribs including center ribs onto trailing edges using plan guide Remove pegs spars lay spars front end down build ing board up end rib/TE assem blies dropping vertically posi tion spars crosspinning ribs white glue sets Make sure tip ribs square spar viewed rear otherwise may get unwanted tip dihedral Remove some covering tailplanes touch center ribs cut out 1/16-in balsa tail packing pieces glue tailplanes glue tailplanes center ribs TEs should have spent eight hours total time reaching stage White glue Sellotape pin LE section place trim ends flush tip ribs using knife razorplane new blade Make leadout holes through inboard tips rat-tail file use hot pushrod melt /8-in dia hole takes practice try first scrap chunk foam go I-in long /8-in dia aluminum brass copper leadout tubes Epoxy place smear epoxy round holes round edge tip reinforce plastic shown plan Fix tips place epoxy white glue Wednesday go control assem blies X 1/32 ply bellcrank stops center-section sheeting Make up pacifier pods fix place add covering support strips /s balsa After removing some covering elevator epoxy 1/32-ply horn mount ing plates place Add balsa tip gusJanuary 1977 91 SoIuFiIm TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA CN AA HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS Aena HOT FUEL PROOF DOPE AWARD WINNING HI-GLOSS AND FLAT FINISHES AVAILABLE IN OVER 36 COLORS IN BRUSH AND SPRAY ptIia Industries InC 7060 HOLLYWOOD BLvD. LOS ANGELES CA 90028 sets sandpaper frame smooth spend ing about five minutes model much sandpaper Add Fascal Solarfilm tail fairings top bottom Thursday Test iron temperature scrap chunk plastic melt LE tips cover models using separate pieces tips Note cannot cover model silk paper nylon because dope melts polystyrene suppose could cover tips LE first paper glued diluted white glue worth time Remember heat melts polysty rene Go steady heat gun iron shrinking covering Dewarping wing over gas stove front electric fire bit risky unless mask LE tips heat sheet balsa chunk cardboard Friday Cut 1 1/32-in wide section leading edge away back spar al low motor mount butt up against remove some covering under bearers will fit wing 1/32-in ply plate eases construc tion increases strength mo tor mounts Mark bearer spacer positions ply build engine bearer assemblies Trim ply away tween bearers fit over wing spar Sellotape nacelles assemblies along motor prop motor-mount bolts nuts plates Slide assembly onto model test CO pins set back leading edge shown plan Adjust motor position obtain CO trimming bearer spacers leading edge re B Pwher7 4 7 6 78 50% SrZeseach84 86 88 65% 5/3 5y0494 96 97 98 63 64 30%i04 10685% 8685%114 116 11-8 961065i 3 BlaJe Trtor 5354 63 6-4 50% 3 BIde Posher 6350% RC 124 125 176150 ORISH BROS ST jOHN INDIANA 46373 quired Remove assembly Drill bolt holes Using drilling jig guide fit some 4-40 blind-mounting nuts epoxy nacelle bearer assemblies complete mounts wings Side-thrust easily obtained want sticking mounts 10 20 offset necessary un less fly very windy conditions Drill 3/16-in hole right through bearers center rib crank mount shown plan insert 3/16-in dia dowel prevents crank mount leaving model during pull test Repeat procedure three other models /8 dural engine mounting plates shown plan cut down vibration make unnecessary cut ply under crankcase glued bearers motor Two coats dope fuel proof er applied mounts after epoxy fillet has smeared round motormount/leading-edge joint prevent gress polystyrene solvents dope glass fiber resin Glass fiber need applied ply stops bearers cracking up Fuel-proof 1/32 ply horn mounting plates elevator fuel-proof Inside fuel pod Saturday morning Youve done very well considering arent familiar model have now fit nylon control horn Kavan medium shown connect Kwik-Link pushrod horn Dewarp model before flying using steam kettle heat gun Flying Fly model level check isnt banking out Fly inverted check same line tension differ ent now outboard tip visible missed removing warp Remove fore flying tight turns model may crash warps have removed fly wide consecutive loops tighten up much possible Note whether outboard wing suddenly drops flies wider 1oops inboard wing simultaneous 15-20% reduction airspeed happens wing has stalled because too much elevator movement Try same procedure outsides before landing drops wing 1oop direction reduce ele vator throw stalling direction refly still stalls move link higher hole horn will need elevator movement windy days satisfied turn per formance add weight tail until Wrap solder round horn make sure model doesnt become di rectionally unstable after doing must still able flicked rocksteady level flight may advantageous building batch models test fly find CO position suits best before glucing motor mounts other models chaps know much about Honking 35s must ex periment find best prop fuel suit needs model intended fly super fast intended turn prop fit must lesser pitch normally use motor right gear sharp corners used 9/6 Rev Up wood Nats 20% fuel got about 95 100 mph level turned about same speed honking streamlined ships Practice Flying universal defense maneuver wiggle whereby model flown zig zag flight path towards ground wingover model directly overhead fly Fig 1 dozen times check gap FIG 1 12 FT GAP CRflI INn should big enough fit least half-loop aim re duce 1-2 ft starting pattern 4 FIG 2 4 92 Model Aviation MORE wMTCC taster ofl same power YELLOW PROPELI G08eesed e~o ~O9 o ADE Metallic Alumiuum S 8W 8-6 88 125 96 106 104 150 106Poshee CtVV150 Fast Blasta continued N WSPAPER mm IIVDP hobby centerinc bit lower time inverted wingovers wiggle up down 455 axis finally dog-leg axis Fig 2 five points maneuver model changes its ioop direction points loop may continued round position behind opposition five opportunities occur ring two seconds throughout match will long before following opponent Remember speed side flying level model much slower its smaller streamlined cousin enough prevent making get-away level flight So instead trying imitate jet anyone can predict therefore intercept must fly model wasp buzzing round jar honey make almost impossible opponent zero accurate ly fly level 1/10 second otherwise some whizz kid will convince himself sitting duck turnspeed probably equal pos sibly better opponent turn radius smaller model capable staying behind others day up put worst thing can lose sight target close following reduces chance happening enormously Watch opponents model copy everything does does matter very close behind him first can cut corners close gap after first couple turns try cuts back streamer Remem ber cannot line up until quit following quit have worry much about line tangles opponent expert flier will prob ably lead Close following again helps sort out line tangle does occur because easier remember flew mutual cooperation can fly out way flew theory anyway forget kill ahead points model sprayed-on color doped finish prefer have brownline run off original vellum manner keep original copies course same Thus draw ing insignia little off scale some dimensions will least uniform brownline first backed adhesive transfer tape colored felt-tip pen Except white use latex white-out After colors successfully done cut out patch peel off tape backing have applique model has colored Japanese tissue finish applique can made using Japanese tissue keep feel model constant would keeping see-through look lightly constructed model Searching good documentation particular aircraft may well lead finding building another interesting model have built decorated model liked built again improve ments flying dr changes struc ture decorated another color scheme second time have same basic airplane completely different model WHEN FIRST started column stated rules would discussed Well shanie having known 4 OlWELL T4ATh ONL MNE INCI4ES ON ThE TALE MAP rule book error rubber scale scoring Rule 507 remember pro posal total score being lower two scale judging flight points seeing book assumed pro posal passed intent proposing using lower score eliminate ghost ships scale competition However just doesnt work way flying conditions bad flight scores will low model wont fly well because spectator damage com plexity choice subject builder re ceives no reward scale con struction effort believe because scale events events reward builder workmanship scale fidelity flying ability three areas should equally considered determining winners fore have submitted rules change pro posal limiting maximum flight points same fifty 50 given workmanship scale fidelity should make opinions proposal known district scale contest board member Ralph D Kuenz 14645 Stahelin De troit Mich 48223 January 1977 93 Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground Price $3495 kit per doUar bar em GREATEST R/C SSBASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andrews Aircraft Modri co Inc 155 Rte 1& North St Topafield Mass 01983 8878541 Support AMA FF Scale/Kuenz continued page 40 Delicate looking Castalbert IV Peanut Old Timer built Stan Fink Walt Mooney plans Photo Carol Cogswell
Edition: Model Aviation - 1977/01
Page Numbers: 25, 26, 27, 28, 29, 91, 92, 93
FAST DL Richard Wilkens THE IDEA THAT should enter 1975 US Nats came Charlie Johnson Gary Frost met British Nats May 1975 already booked peaceful hitchhike tour little old country yours Charlie suggested should visit him Cali fornia before Nats boxed five FAI Blastas left over British Interna tional headed West Charlie Lorna gave plenty advice Fast Com bat hadnt would have doubtful could have entered Nats scaled up 400 sq FAT Blasta California result now consider ably improved appears article original after having miraculously sur vived two mid-air collisions scoring lucky kill second round smashed during fly-off match 5th place against Greg Hissem flying bit too well Editors Note Keep mind flying Fast rules new experience Wilkens comparable US modeler flying FAT rules interna tional competition Compared Fast ships chaps used seeing huge flat-section wing makes flight mula manuals curl up edges dis covered 1965 Britain since 99% British models have used type section advantages models go together extremely quickly cause selfjigging can built flat building board easy repair motor mounts tips tails can reused model gets smashed structure makes easy model formed two broken ones has fewer components its US cousin very few precision fits required during assembly Blasta expanded polystyrene lead ing edge tips 1975 invention worlds respected FAI combat fliers adapts famous Blasta American Fast Combat rules allows mass produce very cheaply identical reusable/replaceable components crushed LE example can cut off replaced field tween matches one-piece tips copy wing section taper produce liftproducing section beyond 36-in balsa frame Tips like may made wing section fitted model thus increasing its aspect ratio reducing induced drag wing may also hollowed out hot knife make super light Britain contest held week between March October country about size Illinois no has far travel Everyone enters contests possible limiting factor ing quickly can replenish stock models US structures thus totally impractical over take too long build Vampires Shrika IIs excepted Because fliers meet nearly week some often take two three differ ent size models along contest may select fly against par ticular opponent hoping out turn model small amount about same speedperhaps bit slower correct selection model rather like expert fisherman selecting right bait certain fish certain river no such thing universal worm beats fish universal combat model beats others another great advantage flat-section wing comes because constructional system allows variation overnight chord therefore area favorite design plastic tip jig can used out modification moving block plastic reduce length tip dur ing cutting As soon someone makes curved wing section problem lot difficult solve screws up airfoil percentages Having never flown Fast Combat fore sizing Fast version shot dark CG bit too far back -oz prop nut fitted Nats model bringing its weight up 19 Top Try Wilkie saying Weighing less 18 oz has wing/loading equivalent Nemesis Turns about 86 loops per minute Left Cardboard rocket tube can substi tuted pacifier pod shown Leading edge cut back spar locating mount January 1977 25 Fast Blasta oz for 460 sq model hol lowed out LE thicker spar web hollowed-out ribs center rib shown has lighter trail ing edge no full-span spruce thinner spar web selecting wood care fully weighs 17 oz further half oz could saved hollowing out thing could try trimming inch off front ribs reduce area speed speed turns still retain advantages structure turns about 86 loops per min ute 10% Nitro 9 X 6 Punchello wood orbits 107 mph level using British 3-strand CL wire motor 8-yearold Supertigre G21/35 modified model has wing loading equiva lent 127 oz Nemisis complete motor ready fly can imagine tight will turn have im agine because cannot build light get some idea its turn capa bility loops about two-thirds diam eter regular 330 sq hot ship lot fun fly interesting combat rules general opinion no substitute cubic inches brute horsepower over rules no substitute square inches few optional modifications model shown plan As life expectancy model between 10 seconds 5 minutes actual combat time solo flying opponents motor will start may want build 3/t-in wide center rib no ply cap strips cut lumps out plastic tips LE spar web ribs center rib etc Still use ers run out ply bearer strengthener use favorite card board roll instead pacifier pod shown want longer tube shift first outboard rib over bit will notice difference model flying have built six models con test two have great three have OK has useless usually due small CG upsets caused wood weight varying model model Plastic doesnt vary spruce varies little balsa varies lot further CG varies greater CG upset build Blastas batches four can cut balsa stripper shown plan four trailing edges 4 X As X 36 sheet set ribs 1/g X 3 sheet ribs too far CG four tails 4 X /8 X 36 sheet Models have similar weight distribution better still motor Expanded polystyrene L E tips permit mass production cheap reusable/replaceable components Top Start L E cut Middle First cut complete Left Leading edge com pletefour models buildable week 26 Model Aviation Above Cutting large slab plastic right size longer hot wire Note guides bat tery tapped 68 1OV Right T B Ready Cut tips Tip being cut 2 pix Tip finished about 20 seconds mount put last after model has covered motor position adjusted before fixing correct CG obtained model Also live very windy area States can stick motor mount l2O side-thrust extra line tension up wind Line tension another point considered because model loops tighter average centrifugal force reduced line whip increases inboard wing 2 inches longer outboard wing help solve prob lem because makes model tend roll out pilot flight attitudes Analyzing structure purpose leading-edge two-fold 1 has separate airflow front wing 2 must prevent wings clapping hands model does ioop polystyrene part cut hot wire simple jig method allows de sign own particular LE shape different wing thicknesses spar made three parts web /s-in balsa two spruce flanges resists bending shear forces imposed LE flight bending stress spar greatest wing root Therefore spruce flanges resist bending stresses taper root Vs X Y8 tips A-in sheet balsa web sized resist shear forces maximum tips cut same balsa stripper used cut ribs Another strip per used cut trailing edges yet another employed cut center rib build strippers push knife blade through lump /2 X 2 X 2/2 balsa point blade protrudes dis tance equal thickness wood intend cut epoxy place Epoxy scrap piece /s X hard balsa spruce distance blade tip equal width strip required slight diverging angle blade cutting direction angle makes sure blade does wan der sheet being stripped cut -in-thick balsa sheet mount blade January1977 27 -in protrusion cut side -in sheet Add Sello tape similar reduce friction strippers very easy make strips cut secondsall exactly same size polystyrene foam LE cut hot wire made piece old controlline wire heated 12V car battery Both 3- 7-strand Laystraight CL wire available Britain has used successfully see no reason scrap length 018 line cannot used 12V makes wire too hot can modify battery tap off 6 8 IOV required Obviously commercial expanded polystyrene wing cutter available model shops better outfit ex pensive Blasta leading edges up now have heen cut homemade ar rangement Build LE cutting jig shown plan -in ply blockboard chiphoard make sure distance tween 1/32-in ply LE templates 19 base Z plate should 11 ate between LE tem plates 1 e Y foam sits 9 X 22 X between two plates d tip jig making sure 1/16 ply wing section template cen terline same distance above base plate 1/16-in hole through ost post can lump engine bearer Tie another piece control-line wire /8-in ply hot-wire T handle pass through post hole tie post Get some cheap electrical flex suitable bedside lamps etc join end hot wire battery About 8 volts should enough cut tips section template should 1/32 bigger around wing section required width ply LE cutting tem plate shown plan LE hot wire frame made X 1 soft pine upright arm H frame made pivot fixing cross member single screw nail bolt Knock nail top bot tom uprights Tie CL hot wire bottom two nails elastic between top pair tension wire elec tric flex about 6 ft used connect end hot wire battery screws cutter ready use Expanded polystyrene available country insulation contractors lo cated checking phone book will probably available 8 X 4 eets enough last year two Cut block 18 x 12 X 2 lay LE jig between templates practice cutting probably best cut down wards side templates gives better shape cut tips lay hot wire base plate behind template mounting post place 4 X 11 X 2 block against wing section template Run hot wire round template pulling time gently wire keep taut hesitate stop anywhere otherwise FASTaLASTA mDaYMOdW WLKENJ Shoot hobo 000 onootw 800 tp 3on4 w00d tn*obw 0m td00 ot.00 0000 nooton nonot000 otozIij noaonboIo0oo. b00 I0LEotIon t no tong 0000 on 001 thoonhnotd noo woo -Optonwt to0owod fi b000 0 900Ot ~o80oott b0onob Iwhq oopatooon hothod L 2 Towbog odgo donf boo onnoowit 000000 pI pbotofiono.0n0Ob __________Li Enpo boonon oooon00y onnotnootton0totOO oonoit000000gpgNALLE 4oott O anot w**on dy nito tonSSr35 Con 0000 no00110 ton LI] oofltg b0on otooP7 0th 0opay ononoononnt st-i Oqoonooglo ffrConto owotion ofrootiti 0 oott 0000- Zonqit Tqo*O00Wq - ton dw00L[T ibdnwbwwodo l -PoOIOon tonb IdfonlOowod tm 34 1n Eloblo twonon hd00 wobon -Ahod,obonth itobon 23 22 ISO 1oonbottony Pt ton0Iotodonononi X plot nwonobo b 000 nob 4Eho1 ton ST Ost 58 olonob 0 p1000 0ho0 000 ob Enwot pOditwo 100th 7 onEt hobo 2nqkwd00*1010I t hdt KooOo towikon oton 000 %obloopoon nontro ootnn3oaonnolo niton on0010 1ooply boiwonk ion ob*onwi -tdOTE LEoontonono ion 0000 nob 0000 nonnE 0 0oott 000000000000 000000t TopIon ply ono 00np on0 00 000000 towo 000 000* ro-notonownont 0*0 000000 WinO o00 000 tot oft ototog 0000000 *00w. 000 ooottod OpOonlolTE totnh onowoqo 0 0000 0 t b000 p000000 pOd 2oqbod Solontknon two toning ModIfy No 510 non, 00dm Sddqoo WnoOqtottO tW IolobtopS ton p00000BbotOon 28 Model Aviation Fl Eooqtoot0 /tboon SootnTE i ottod 30000 O00 10 0d.p 0 ton t odotkotfn000t 0opltn groove will melted surface tipwhich does matter much unless leading edge Once wire has pulled right round template move plastic forward about 1 lift block up away jig tip will fall out block will take long cut enough five ten models after experimenting bit different voltages wont cost much either model like others will prob ably break hits ground spruce center-section strengtheners stop abruptly along leading trailing edges attempt encourage wing snap points repairs easy instead next center rib may like encourage break notching TE points must point out however idea no proof will work should able make both jigs convert battery experiment bplyooototboodK plyooolokbodteoley e 000 oertdOhOt0t Ik-Soolto 7 I. gdeoe P0 Optod holbeed OOt p 5 OOly pO0teo pod olg Oqed khdlo hole doot hole 10 lb poeltoe edOptloeol Ighteleeg 1000 kotid 100g ot tot tho loWO Ore rO ototeeootoO5oOV eyoo Ipem eeerdttd eye Ioeg tot tt eev different voltages cut enough leading edge section tips four models couple evenings Once rib template balsa strippers engine bearer drill ing jig have made ready mass production Construction Make sign saying model am taking hours construct may last 10 seconds combat Now make another saying model 60 ft away flying 100 mph engaged combat will notice effect extra work Pin up above workbench remind spend time fiddling about silly details will assume going make four models combat next weekend Monday evening have already built jigs templates have pile tips LE sections Grab very light X 4 X 36 balsa sheet mark rib positions right across over plan using square trailing edge stripper strip four strips razor-plane chamfer rear /4 trailing edge sharp point leaving center section square meets tail plane Cut four 9 X / X ce strips 36-in length white glue Sellotape fix trailing edge position shown plan Sellotape holds spruce position glue drying bother remove tape read sign 2 Mark rib positions two 3 X 1/i X 36 sheets balsa strip 1/2-in strips rib stripper four strips become spar webs Strip four 3 X /i X 36 sheets down middle same stripper 9-inlong rib template laid top strips cut rib tapers TE notch Use template mark front rib Remove template place small metal square strip cut rib free simple perfectly accurate cross cut Only 31 go Take two /s X /s spruce strips hack taper end both measure /i square tips glue webs white glue epoxy clamping about 20 spring clothes pins like can set about 1/64 edges web save having get perfect edge alignment Fit two /i X /8 centersection reinforcing spruce strips other side web set aside dry Modify No 5 rib front fit web same other three spars Cut balsa center rib center rib stripper Cut tapers crank mount holes TE tail notches center rib 12 long continued page 9] January 1977 29 31h I. 2 jeokee oP otttoeoketloedeg ge - PIOokOtOooOo Ootteg pg e0g hod reh Wilkens left Frank Smart holding two FAI planes just show big much Fast Blasta like Airfoil plans left self jigging flies very well Lhooflleg -be 2eqked Shereshaws beautiful big cabin machine Gene has 24 ready go Shortly will shipping parts kits Dallaire Sportster won RC Antique 76 SAM Champs Trenton Ter ror Miss America beautiful sevenfoot Buccaneer Super Buccaneer oldies goodies biggies Postscripts will end up months column bi-monthly plea puts readers Next column will report results Scotty Mur ray Memorial Annual Pensacola Although home still Pensa cola am working Washington DC Please address correspondence Jack Bolton 8W7 Ferncl CL Spring field VA 22153 phone 703 455-3089 please include SASE Fast Blasta/Wilkens continued page 29 yougetsixoutofa3 X sheet Cut 1/32 ply cap strips top incorporates pushrod slot White glue Sellotape again Tuesday Cut A-in ply crank mounts drill crank bolt holes suit 3-in belicrank mounting bolts British Micromold 3 nylon crank shown plan crank can used use pushrod hole nearest bolt Insert crank bolts add cranks leadouts pushrods Make Z-bend 1/16 music wire prevent falling out crank Cut out four delta tails 4 X 36 X /s soft balsa sheet extend front tail adding 1 X /i balsa strip tail use 5-in sheet can buy Cut Y8-in soft balsa elevators round off edges sandpaper No fancy airfoilsread signs tailplane flat edge table elevator right angles down over table edge stick top I-in wide Sellotape hinge pressing tape crack Turn lot over repeat operation Bend elevator up down dozen times check hinge OK cover side tail elevator single piece Fascal Solarfilm again elevator right angles tail Turn over re peat Number ribs cut leadout holes Use white glue Hot Stuff assembly components except LEs tips may fixed Hot Stuff First stick ribs including center ribs onto trailing edges using plan guide Remove pegs spars lay spars front end down build ing board up end rib/TE assem blies dropping vertically posi tion spars crosspinning ribs white glue sets Make sure tip ribs square spar viewed rear otherwise may get unwanted tip dihedral Remove some covering tailplanes touch center ribs cut out 1/16-in balsa tail packing pieces glue tailplanes glue tailplanes center ribs TEs should have spent eight hours total time reaching stage White glue Sellotape pin LE section place trim ends flush tip ribs using knife razorplane new blade Make leadout holes through inboard tips rat-tail file use hot pushrod melt /8-in dia hole takes practice try first scrap chunk foam go I-in long /8-in dia aluminum brass copper leadout tubes Epoxy place smear epoxy round holes round edge tip reinforce plastic shown plan Fix tips place epoxy white glue Wednesday go control assem blies X 1/32 ply bellcrank stops center-section sheeting Make up pacifier pods fix place add covering support strips /s balsa After removing some covering elevator epoxy 1/32-ply horn mount ing plates place Add balsa tip gusJanuary 1977 91 SoIuFiIm TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA CN AA HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS Aena HOT FUEL PROOF DOPE AWARD WINNING HI-GLOSS AND FLAT FINISHES AVAILABLE IN OVER 36 COLORS IN BRUSH AND SPRAY ptIia Industries InC 7060 HOLLYWOOD BLvD. LOS ANGELES CA 90028 sets sandpaper frame smooth spend ing about five minutes model much sandpaper Add Fascal Solarfilm tail fairings top bottom Thursday Test iron temperature scrap chunk plastic melt LE tips cover models using separate pieces tips Note cannot cover model silk paper nylon because dope melts polystyrene suppose could cover tips LE first paper glued diluted white glue worth time Remember heat melts polysty rene Go steady heat gun iron shrinking covering Dewarping wing over gas stove front electric fire bit risky unless mask LE tips heat sheet balsa chunk cardboard Friday Cut 1 1/32-in wide section leading edge away back spar al low motor mount butt up against remove some covering under bearers will fit wing 1/32-in ply plate eases construc tion increases strength mo tor mounts Mark bearer spacer positions ply build engine bearer assemblies Trim ply away tween bearers fit over wing spar Sellotape nacelles assemblies along motor prop motor-mount bolts nuts plates Slide assembly onto model test CO pins set back leading edge shown plan Adjust motor position obtain CO trimming bearer spacers leading edge re B Pwher7 4 7 6 78 50% SrZeseach84 86 88 65% 5/3 5y0494 96 97 98 63 64 30%i04 10685% 8685%114 116 11-8 961065i 3 BlaJe Trtor 5354 63 6-4 50% 3 BIde Posher 6350% RC 124 125 176150 ORISH BROS ST jOHN INDIANA 46373 quired Remove assembly Drill bolt holes Using drilling jig guide fit some 4-40 blind-mounting nuts epoxy nacelle bearer assemblies complete mounts wings Side-thrust easily obtained want sticking mounts 10 20 offset necessary un less fly very windy conditions Drill 3/16-in hole right through bearers center rib crank mount shown plan insert 3/16-in dia dowel prevents crank mount leaving model during pull test Repeat procedure three other models /8 dural engine mounting plates shown plan cut down vibration make unnecessary cut ply under crankcase glued bearers motor Two coats dope fuel proof er applied mounts after epoxy fillet has smeared round motormount/leading-edge joint prevent gress polystyrene solvents dope glass fiber resin Glass fiber need applied ply stops bearers cracking up Fuel-proof 1/32 ply horn mounting plates elevator fuel-proof Inside fuel pod Saturday morning Youve done very well considering arent familiar model have now fit nylon control horn Kavan medium shown connect Kwik-Link pushrod horn Dewarp model before flying using steam kettle heat gun Flying Fly model level check isnt banking out Fly inverted check same line tension differ ent now outboard tip visible missed removing warp Remove fore flying tight turns model may crash warps have removed fly wide consecutive loops tighten up much possible Note whether outboard wing suddenly drops flies wider 1oops inboard wing simultaneous 15-20% reduction airspeed happens wing has stalled because too much elevator movement Try same procedure outsides before landing drops wing 1oop direction reduce ele vator throw stalling direction refly still stalls move link higher hole horn will need elevator movement windy days satisfied turn per formance add weight tail until Wrap solder round horn make sure model doesnt become di rectionally unstable after doing must still able flicked rocksteady level flight may advantageous building batch models test fly find CO position suits best before glucing motor mounts other models chaps know much about Honking 35s must ex periment find best prop fuel suit needs model intended fly super fast intended turn prop fit must lesser pitch normally use motor right gear sharp corners used 9/6 Rev Up wood Nats 20% fuel got about 95 100 mph level turned about same speed honking streamlined ships Practice Flying universal defense maneuver wiggle whereby model flown zig zag flight path towards ground wingover model directly overhead fly Fig 1 dozen times check gap FIG 1 12 FT GAP CRflI INn should big enough fit least half-loop aim re duce 1-2 ft starting pattern 4 FIG 2 4 92 Model Aviation MORE wMTCC taster ofl same power YELLOW PROPELI G08eesed e~o ~O9 o ADE Metallic Alumiuum S 8W 8-6 88 125 96 106 104 150 106Poshee CtVV150 Fast Blasta continued N WSPAPER mm IIVDP hobby centerinc bit lower time inverted wingovers wiggle up down 455 axis finally dog-leg axis Fig 2 five points maneuver model changes its ioop direction points loop may continued round position behind opposition five opportunities occur ring two seconds throughout match will long before following opponent Remember speed side flying level model much slower its smaller streamlined cousin enough prevent making get-away level flight So instead trying imitate jet anyone can predict therefore intercept must fly model wasp buzzing round jar honey make almost impossible opponent zero accurate ly fly level 1/10 second otherwise some whizz kid will convince himself sitting duck turnspeed probably equal pos sibly better opponent turn radius smaller model capable staying behind others day up put worst thing can lose sight target close following reduces chance happening enormously Watch opponents model copy everything does does matter very close behind him first can cut corners close gap after first couple turns try cuts back streamer Remem ber cannot line up until quit following quit have worry much about line tangles opponent expert flier will prob ably lead Close following again helps sort out line tangle does occur because easier remember flew mutual cooperation can fly out way flew theory anyway forget kill ahead points model sprayed-on color doped finish prefer have brownline run off original vellum manner keep original copies course same Thus draw ing insignia little off scale some dimensions will least uniform brownline first backed adhesive transfer tape colored felt-tip pen Except white use latex white-out After colors successfully done cut out patch peel off tape backing have applique model has colored Japanese tissue finish applique can made using Japanese tissue keep feel model constant would keeping see-through look lightly constructed model Searching good documentation particular aircraft may well lead finding building another interesting model have built decorated model liked built again improve ments flying dr changes struc ture decorated another color scheme second time have same basic airplane completely different model WHEN FIRST started column stated rules would discussed Well shanie having known 4 OlWELL T4ATh ONL MNE INCI4ES ON ThE TALE MAP rule book error rubber scale scoring Rule 507 remember pro posal total score being lower two scale judging flight points seeing book assumed pro posal passed intent proposing using lower score eliminate ghost ships scale competition However just doesnt work way flying conditions bad flight scores will low model wont fly well because spectator damage com plexity choice subject builder re ceives no reward scale con struction effort believe because scale events events reward builder workmanship scale fidelity flying ability three areas should equally considered determining winners fore have submitted rules change pro posal limiting maximum flight points same fifty 50 given workmanship scale fidelity should make opinions proposal known district scale contest board member Ralph D Kuenz 14645 Stahelin De troit Mich 48223 January 1977 93 Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground Price $3495 kit per doUar bar em GREATEST R/C SSBASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andrews Aircraft Modri co Inc 155 Rte 1& North St Topafield Mass 01983 8878541 Support AMA FF Scale/Kuenz continued page 40 Delicate looking Castalbert IV Peanut Old Timer built Stan Fink Walt Mooney plans Photo Carol Cogswell
Edition: Model Aviation - 1977/01
Page Numbers: 25, 26, 27, 28, 29, 91, 92, 93
FAST DL Richard Wilkens THE IDEA THAT should enter 1975 US Nats came Charlie Johnson Gary Frost met British Nats May 1975 already booked peaceful hitchhike tour little old country yours Charlie suggested should visit him Cali fornia before Nats boxed five FAI Blastas left over British Interna tional headed West Charlie Lorna gave plenty advice Fast Com bat hadnt would have doubtful could have entered Nats scaled up 400 sq FAT Blasta California result now consider ably improved appears article original after having miraculously sur vived two mid-air collisions scoring lucky kill second round smashed during fly-off match 5th place against Greg Hissem flying bit too well Editors Note Keep mind flying Fast rules new experience Wilkens comparable US modeler flying FAT rules interna tional competition Compared Fast ships chaps used seeing huge flat-section wing makes flight mula manuals curl up edges dis covered 1965 Britain since 99% British models have used type section advantages models go together extremely quickly cause selfjigging can built flat building board easy repair motor mounts tips tails can reused model gets smashed structure makes easy model formed two broken ones has fewer components its US cousin very few precision fits required during assembly Blasta expanded polystyrene lead ing edge tips 1975 invention worlds respected FAI combat fliers adapts famous Blasta American Fast Combat rules allows mass produce very cheaply identical reusable/replaceable components crushed LE example can cut off replaced field tween matches one-piece tips copy wing section taper produce liftproducing section beyond 36-in balsa frame Tips like may made wing section fitted model thus increasing its aspect ratio reducing induced drag wing may also hollowed out hot knife make super light Britain contest held week between March October country about size Illinois no has far travel Everyone enters contests possible limiting factor ing quickly can replenish stock models US structures thus totally impractical over take too long build Vampires Shrika IIs excepted Because fliers meet nearly week some often take two three differ ent size models along contest may select fly against par ticular opponent hoping out turn model small amount about same speedperhaps bit slower correct selection model rather like expert fisherman selecting right bait certain fish certain river no such thing universal worm beats fish universal combat model beats others another great advantage flat-section wing comes because constructional system allows variation overnight chord therefore area favorite design plastic tip jig can used out modification moving block plastic reduce length tip dur ing cutting As soon someone makes curved wing section problem lot difficult solve screws up airfoil percentages Having never flown Fast Combat fore sizing Fast version shot dark CG bit too far back -oz prop nut fitted Nats model bringing its weight up 19 Top Try Wilkie saying Weighing less 18 oz has wing/loading equivalent Nemesis Turns about 86 loops per minute Left Cardboard rocket tube can substi tuted pacifier pod shown Leading edge cut back spar locating mount January 1977 25 Fast Blasta oz for 460 sq model hol lowed out LE thicker spar web hollowed-out ribs center rib shown has lighter trail ing edge no full-span spruce thinner spar web selecting wood care fully weighs 17 oz further half oz could saved hollowing out thing could try trimming inch off front ribs reduce area speed speed turns still retain advantages structure turns about 86 loops per min ute 10% Nitro 9 X 6 Punchello wood orbits 107 mph level using British 3-strand CL wire motor 8-yearold Supertigre G21/35 modified model has wing loading equiva lent 127 oz Nemisis complete motor ready fly can imagine tight will turn have im agine because cannot build light get some idea its turn capa bility loops about two-thirds diam eter regular 330 sq hot ship lot fun fly interesting combat rules general opinion no substitute cubic inches brute horsepower over rules no substitute square inches few optional modifications model shown plan As life expectancy model between 10 seconds 5 minutes actual combat time solo flying opponents motor will start may want build 3/t-in wide center rib no ply cap strips cut lumps out plastic tips LE spar web ribs center rib etc Still use ers run out ply bearer strengthener use favorite card board roll instead pacifier pod shown want longer tube shift first outboard rib over bit will notice difference model flying have built six models con test two have great three have OK has useless usually due small CG upsets caused wood weight varying model model Plastic doesnt vary spruce varies little balsa varies lot further CG varies greater CG upset build Blastas batches four can cut balsa stripper shown plan four trailing edges 4 X As X 36 sheet set ribs 1/g X 3 sheet ribs too far CG four tails 4 X /8 X 36 sheet Models have similar weight distribution better still motor Expanded polystyrene L E tips permit mass production cheap reusable/replaceable components Top Start L E cut Middle First cut complete Left Leading edge com pletefour models buildable week 26 Model Aviation Above Cutting large slab plastic right size longer hot wire Note guides bat tery tapped 68 1OV Right T B Ready Cut tips Tip being cut 2 pix Tip finished about 20 seconds mount put last after model has covered motor position adjusted before fixing correct CG obtained model Also live very windy area States can stick motor mount l2O side-thrust extra line tension up wind Line tension another point considered because model loops tighter average centrifugal force reduced line whip increases inboard wing 2 inches longer outboard wing help solve prob lem because makes model tend roll out pilot flight attitudes Analyzing structure purpose leading-edge two-fold 1 has separate airflow front wing 2 must prevent wings clapping hands model does ioop polystyrene part cut hot wire simple jig method allows de sign own particular LE shape different wing thicknesses spar made three parts web /s-in balsa two spruce flanges resists bending shear forces imposed LE flight bending stress spar greatest wing root Therefore spruce flanges resist bending stresses taper root Vs X Y8 tips A-in sheet balsa web sized resist shear forces maximum tips cut same balsa stripper used cut ribs Another strip per used cut trailing edges yet another employed cut center rib build strippers push knife blade through lump /2 X 2 X 2/2 balsa point blade protrudes dis tance equal thickness wood intend cut epoxy place Epoxy scrap piece /s X hard balsa spruce distance blade tip equal width strip required slight diverging angle blade cutting direction angle makes sure blade does wan der sheet being stripped cut -in-thick balsa sheet mount blade January1977 27 -in protrusion cut side -in sheet Add Sello tape similar reduce friction strippers very easy make strips cut secondsall exactly same size polystyrene foam LE cut hot wire made piece old controlline wire heated 12V car battery Both 3- 7-strand Laystraight CL wire available Britain has used successfully see no reason scrap length 018 line cannot used 12V makes wire too hot can modify battery tap off 6 8 IOV required Obviously commercial expanded polystyrene wing cutter available model shops better outfit ex pensive Blasta leading edges up now have heen cut homemade ar rangement Build LE cutting jig shown plan -in ply blockboard chiphoard make sure distance tween 1/32-in ply LE templates 19 base Z plate should 11 ate between LE tem plates 1 e Y foam sits 9 X 22 X between two plates d tip jig making sure 1/16 ply wing section template cen terline same distance above base plate 1/16-in hole through ost post can lump engine bearer Tie another piece control-line wire /8-in ply hot-wire T handle pass through post hole tie post Get some cheap electrical flex suitable bedside lamps etc join end hot wire battery About 8 volts should enough cut tips section template should 1/32 bigger around wing section required width ply LE cutting tem plate shown plan LE hot wire frame made X 1 soft pine upright arm H frame made pivot fixing cross member single screw nail bolt Knock nail top bot tom uprights Tie CL hot wire bottom two nails elastic between top pair tension wire elec tric flex about 6 ft used connect end hot wire battery screws cutter ready use Expanded polystyrene available country insulation contractors lo cated checking phone book will probably available 8 X 4 eets enough last year two Cut block 18 x 12 X 2 lay LE jig between templates practice cutting probably best cut down wards side templates gives better shape cut tips lay hot wire base plate behind template mounting post place 4 X 11 X 2 block against wing section template Run hot wire round template pulling time gently wire keep taut hesitate stop anywhere otherwise FASTaLASTA mDaYMOdW WLKENJ Shoot hobo 000 onootw 800 tp 3on4 w00d tn*obw 0m td00 ot.00 0000 nooton nonot000 otozIij noaonboIo0oo. b00 I0LEotIon t no tong 0000 on 001 thoonhnotd noo woo -Optonwt to0owod fi b000 0 900Ot ~o80oott b0onob Iwhq oopatooon hothod L 2 Towbog odgo donf boo onnoowit 000000 pI pbotofiono.0n0Ob __________Li Enpo boonon oooon00y onnotnootton0totOO oonoit000000gpgNALLE 4oott O anot w**on dy nito tonSSr35 Con 0000 no00110 ton LI] oofltg b0on otooP7 0th 0opay ononoononnt st-i Oqoonooglo ffrConto owotion ofrootiti 0 oott 0000- Zonqit Tqo*O00Wq - ton dw00L[T ibdnwbwwodo l -PoOIOon tonb IdfonlOowod tm 34 1n Eloblo twonon hd00 wobon -Ahod,obonth itobon 23 22 ISO 1oonbottony Pt ton0Iotodonononi X plot nwonobo b 000 nob 4Eho1 ton ST Ost 58 olonob 0 p1000 0ho0 000 ob Enwot pOditwo 100th 7 onEt hobo 2nqkwd00*1010I t hdt KooOo towikon oton 000 %obloopoon nontro ootnn3oaonnolo niton on0010 1ooply boiwonk ion ob*onwi -tdOTE LEoontonono ion 0000 nob 0000 nonnE 0 0oott 000000000000 000000t TopIon ply ono 00np on0 00 000000 towo 000 000* ro-notonownont 0*0 000000 WinO o00 000 tot oft ototog 0000000 *00w. 000 ooottod OpOonlolTE totnh onowoqo 0 0000 0 t b000 p000000 pOd 2oqbod Solontknon two toning ModIfy No 510 non, 00dm Sddqoo WnoOqtottO tW IolobtopS ton p00000BbotOon 28 Model Aviation Fl Eooqtoot0 /tboon SootnTE i ottod 30000 O00 10 0d.p 0 ton t odotkotfn000t 0opltn groove will melted surface tipwhich does matter much unless leading edge Once wire has pulled right round template move plastic forward about 1 lift block up away jig tip will fall out block will take long cut enough five ten models after experimenting bit different voltages wont cost much either model like others will prob ably break hits ground spruce center-section strengtheners stop abruptly along leading trailing edges attempt encourage wing snap points repairs easy instead next center rib may like encourage break notching TE points must point out however idea no proof will work should able make both jigs convert battery experiment bplyooototboodK plyooolokbodteoley e 000 oertdOhOt0t Ik-Soolto 7 I. gdeoe P0 Optod holbeed OOt p 5 OOly pO0teo pod olg Oqed khdlo hole doot hole 10 lb poeltoe edOptloeol Ighteleeg 1000 kotid 100g ot tot tho loWO Ore rO ototeeootoO5oOV eyoo Ipem eeerdttd eye Ioeg tot tt eev different voltages cut enough leading edge section tips four models couple evenings Once rib template balsa strippers engine bearer drill ing jig have made ready mass production Construction Make sign saying model am taking hours construct may last 10 seconds combat Now make another saying model 60 ft away flying 100 mph engaged combat will notice effect extra work Pin up above workbench remind spend time fiddling about silly details will assume going make four models combat next weekend Monday evening have already built jigs templates have pile tips LE sections Grab very light X 4 X 36 balsa sheet mark rib positions right across over plan using square trailing edge stripper strip four strips razor-plane chamfer rear /4 trailing edge sharp point leaving center section square meets tail plane Cut four 9 X / X ce strips 36-in length white glue Sellotape fix trailing edge position shown plan Sellotape holds spruce position glue drying bother remove tape read sign 2 Mark rib positions two 3 X 1/i X 36 sheets balsa strip 1/2-in strips rib stripper four strips become spar webs Strip four 3 X /i X 36 sheets down middle same stripper 9-inlong rib template laid top strips cut rib tapers TE notch Use template mark front rib Remove template place small metal square strip cut rib free simple perfectly accurate cross cut Only 31 go Take two /s X /s spruce strips hack taper end both measure /i square tips glue webs white glue epoxy clamping about 20 spring clothes pins like can set about 1/64 edges web save having get perfect edge alignment Fit two /i X /8 centersection reinforcing spruce strips other side web set aside dry Modify No 5 rib front fit web same other three spars Cut balsa center rib center rib stripper Cut tapers crank mount holes TE tail notches center rib 12 long continued page 9] January 1977 29 31h I. 2 jeokee oP otttoeoketloedeg ge - PIOokOtOooOo Ootteg pg e0g hod reh Wilkens left Frank Smart holding two FAI planes just show big much Fast Blasta like Airfoil plans left self jigging flies very well Lhooflleg -be 2eqked Shereshaws beautiful big cabin machine Gene has 24 ready go Shortly will shipping parts kits Dallaire Sportster won RC Antique 76 SAM Champs Trenton Ter ror Miss America beautiful sevenfoot Buccaneer Super Buccaneer oldies goodies biggies Postscripts will end up months column bi-monthly plea puts readers Next column will report results Scotty Mur ray Memorial Annual Pensacola Although home still Pensa cola am working Washington DC Please address correspondence Jack Bolton 8W7 Ferncl CL Spring field VA 22153 phone 703 455-3089 please include SASE Fast Blasta/Wilkens continued page 29 yougetsixoutofa3 X sheet Cut 1/32 ply cap strips top incorporates pushrod slot White glue Sellotape again Tuesday Cut A-in ply crank mounts drill crank bolt holes suit 3-in belicrank mounting bolts British Micromold 3 nylon crank shown plan crank can used use pushrod hole nearest bolt Insert crank bolts add cranks leadouts pushrods Make Z-bend 1/16 music wire prevent falling out crank Cut out four delta tails 4 X 36 X /s soft balsa sheet extend front tail adding 1 X /i balsa strip tail use 5-in sheet can buy Cut Y8-in soft balsa elevators round off edges sandpaper No fancy airfoilsread signs tailplane flat edge table elevator right angles down over table edge stick top I-in wide Sellotape hinge pressing tape crack Turn lot over repeat operation Bend elevator up down dozen times check hinge OK cover side tail elevator single piece Fascal Solarfilm again elevator right angles tail Turn over re peat Number ribs cut leadout holes Use white glue Hot Stuff assembly components except LEs tips may fixed Hot Stuff First stick ribs including center ribs onto trailing edges using plan guide Remove pegs spars lay spars front end down build ing board up end rib/TE assem blies dropping vertically posi tion spars crosspinning ribs white glue sets Make sure tip ribs square spar viewed rear otherwise may get unwanted tip dihedral Remove some covering tailplanes touch center ribs cut out 1/16-in balsa tail packing pieces glue tailplanes glue tailplanes center ribs TEs should have spent eight hours total time reaching stage White glue Sellotape pin LE section place trim ends flush tip ribs using knife razorplane new blade Make leadout holes through inboard tips rat-tail file use hot pushrod melt /8-in dia hole takes practice try first scrap chunk foam go I-in long /8-in dia aluminum brass copper leadout tubes Epoxy place smear epoxy round holes round edge tip reinforce plastic shown plan Fix tips place epoxy white glue Wednesday go control assem blies X 1/32 ply bellcrank stops center-section sheeting Make up pacifier pods fix place add covering support strips /s balsa After removing some covering elevator epoxy 1/32-ply horn mount ing plates place Add balsa tip gusJanuary 1977 91 SoIuFiIm TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA CN AA HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS Aena HOT FUEL PROOF DOPE AWARD WINNING HI-GLOSS AND FLAT FINISHES AVAILABLE IN OVER 36 COLORS IN BRUSH AND SPRAY ptIia Industries InC 7060 HOLLYWOOD BLvD. LOS ANGELES CA 90028 sets sandpaper frame smooth spend ing about five minutes model much sandpaper Add Fascal Solarfilm tail fairings top bottom Thursday Test iron temperature scrap chunk plastic melt LE tips cover models using separate pieces tips Note cannot cover model silk paper nylon because dope melts polystyrene suppose could cover tips LE first paper glued diluted white glue worth time Remember heat melts polysty rene Go steady heat gun iron shrinking covering Dewarping wing over gas stove front electric fire bit risky unless mask LE tips heat sheet balsa chunk cardboard Friday Cut 1 1/32-in wide section leading edge away back spar al low motor mount butt up against remove some covering under bearers will fit wing 1/32-in ply plate eases construc tion increases strength mo tor mounts Mark bearer spacer positions ply build engine bearer assemblies Trim ply away tween bearers fit over wing spar Sellotape nacelles assemblies along motor prop motor-mount bolts nuts plates Slide assembly onto model test CO pins set back leading edge shown plan Adjust motor position obtain CO trimming bearer spacers leading edge re B Pwher7 4 7 6 78 50% SrZeseach84 86 88 65% 5/3 5y0494 96 97 98 63 64 30%i04 10685% 8685%114 116 11-8 961065i 3 BlaJe Trtor 5354 63 6-4 50% 3 BIde Posher 6350% RC 124 125 176150 ORISH BROS ST jOHN INDIANA 46373 quired Remove assembly Drill bolt holes Using drilling jig guide fit some 4-40 blind-mounting nuts epoxy nacelle bearer assemblies complete mounts wings Side-thrust easily obtained want sticking mounts 10 20 offset necessary un less fly very windy conditions Drill 3/16-in hole right through bearers center rib crank mount shown plan insert 3/16-in dia dowel prevents crank mount leaving model during pull test Repeat procedure three other models /8 dural engine mounting plates shown plan cut down vibration make unnecessary cut ply under crankcase glued bearers motor Two coats dope fuel proof er applied mounts after epoxy fillet has smeared round motormount/leading-edge joint prevent gress polystyrene solvents dope glass fiber resin Glass fiber need applied ply stops bearers cracking up Fuel-proof 1/32 ply horn mounting plates elevator fuel-proof Inside fuel pod Saturday morning Youve done very well considering arent familiar model have now fit nylon control horn Kavan medium shown connect Kwik-Link pushrod horn Dewarp model before flying using steam kettle heat gun Flying Fly model level check isnt banking out Fly inverted check same line tension differ ent now outboard tip visible missed removing warp Remove fore flying tight turns model may crash warps have removed fly wide consecutive loops tighten up much possible Note whether outboard wing suddenly drops flies wider 1oops inboard wing simultaneous 15-20% reduction airspeed happens wing has stalled because too much elevator movement Try same procedure outsides before landing drops wing 1oop direction reduce ele vator throw stalling direction refly still stalls move link higher hole horn will need elevator movement windy days satisfied turn per formance add weight tail until Wrap solder round horn make sure model doesnt become di rectionally unstable after doing must still able flicked rocksteady level flight may advantageous building batch models test fly find CO position suits best before glucing motor mounts other models chaps know much about Honking 35s must ex periment find best prop fuel suit needs model intended fly super fast intended turn prop fit must lesser pitch normally use motor right gear sharp corners used 9/6 Rev Up wood Nats 20% fuel got about 95 100 mph level turned about same speed honking streamlined ships Practice Flying universal defense maneuver wiggle whereby model flown zig zag flight path towards ground wingover model directly overhead fly Fig 1 dozen times check gap FIG 1 12 FT GAP CRflI INn should big enough fit least half-loop aim re duce 1-2 ft starting pattern 4 FIG 2 4 92 Model Aviation MORE wMTCC taster ofl same power YELLOW PROPELI G08eesed e~o ~O9 o ADE Metallic Alumiuum S 8W 8-6 88 125 96 106 104 150 106Poshee CtVV150 Fast Blasta continued N WSPAPER mm IIVDP hobby centerinc bit lower time inverted wingovers wiggle up down 455 axis finally dog-leg axis Fig 2 five points maneuver model changes its ioop direction points loop may continued round position behind opposition five opportunities occur ring two seconds throughout match will long before following opponent Remember speed side flying level model much slower its smaller streamlined cousin enough prevent making get-away level flight So instead trying imitate jet anyone can predict therefore intercept must fly model wasp buzzing round jar honey make almost impossible opponent zero accurate ly fly level 1/10 second otherwise some whizz kid will convince himself sitting duck turnspeed probably equal pos sibly better opponent turn radius smaller model capable staying behind others day up put worst thing can lose sight target close following reduces chance happening enormously Watch opponents model copy everything does does matter very close behind him first can cut corners close gap after first couple turns try cuts back streamer Remem ber cannot line up until quit following quit have worry much about line tangles opponent expert flier will prob ably lead Close following again helps sort out line tangle does occur because easier remember flew mutual cooperation can fly out way flew theory anyway forget kill ahead points model sprayed-on color doped finish prefer have brownline run off original vellum manner keep original copies course same Thus draw ing insignia little off scale some dimensions will least uniform brownline first backed adhesive transfer tape colored felt-tip pen Except white use latex white-out After colors successfully done cut out patch peel off tape backing have applique model has colored Japanese tissue finish applique can made using Japanese tissue keep feel model constant would keeping see-through look lightly constructed model Searching good documentation particular aircraft may well lead finding building another interesting model have built decorated model liked built again improve ments flying dr changes struc ture decorated another color scheme second time have same basic airplane completely different model WHEN FIRST started column stated rules would discussed Well shanie having known 4 OlWELL T4ATh ONL MNE INCI4ES ON ThE TALE MAP rule book error rubber scale scoring Rule 507 remember pro posal total score being lower two scale judging flight points seeing book assumed pro posal passed intent proposing using lower score eliminate ghost ships scale competition However just doesnt work way flying conditions bad flight scores will low model wont fly well because spectator damage com plexity choice subject builder re ceives no reward scale con struction effort believe because scale events events reward builder workmanship scale fidelity flying ability three areas should equally considered determining winners fore have submitted rules change pro posal limiting maximum flight points same fifty 50 given workmanship scale fidelity should make opinions proposal known district scale contest board member Ralph D Kuenz 14645 Stahelin De troit Mich 48223 January 1977 93 Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground Price $3495 kit per doUar bar em GREATEST R/C SSBASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andrews Aircraft Modri co Inc 155 Rte 1& North St Topafield Mass 01983 8878541 Support AMA FF Scale/Kuenz continued page 40 Delicate looking Castalbert IV Peanut Old Timer built Stan Fink Walt Mooney plans Photo Carol Cogswell
Edition: Model Aviation - 1977/01
Page Numbers: 25, 26, 27, 28, 29, 91, 92, 93
FAST DL Richard Wilkens THE IDEA THAT should enter 1975 US Nats came Charlie Johnson Gary Frost met British Nats May 1975 already booked peaceful hitchhike tour little old country yours Charlie suggested should visit him Cali fornia before Nats boxed five FAI Blastas left over British Interna tional headed West Charlie Lorna gave plenty advice Fast Com bat hadnt would have doubtful could have entered Nats scaled up 400 sq FAT Blasta California result now consider ably improved appears article original after having miraculously sur vived two mid-air collisions scoring lucky kill second round smashed during fly-off match 5th place against Greg Hissem flying bit too well Editors Note Keep mind flying Fast rules new experience Wilkens comparable US modeler flying FAT rules interna tional competition Compared Fast ships chaps used seeing huge flat-section wing makes flight mula manuals curl up edges dis covered 1965 Britain since 99% British models have used type section advantages models go together extremely quickly cause selfjigging can built flat building board easy repair motor mounts tips tails can reused model gets smashed structure makes easy model formed two broken ones has fewer components its US cousin very few precision fits required during assembly Blasta expanded polystyrene lead ing edge tips 1975 invention worlds respected FAI combat fliers adapts famous Blasta American Fast Combat rules allows mass produce very cheaply identical reusable/replaceable components crushed LE example can cut off replaced field tween matches one-piece tips copy wing section taper produce liftproducing section beyond 36-in balsa frame Tips like may made wing section fitted model thus increasing its aspect ratio reducing induced drag wing may also hollowed out hot knife make super light Britain contest held week between March October country about size Illinois no has far travel Everyone enters contests possible limiting factor ing quickly can replenish stock models US structures thus totally impractical over take too long build Vampires Shrika IIs excepted Because fliers meet nearly week some often take two three differ ent size models along contest may select fly against par ticular opponent hoping out turn model small amount about same speedperhaps bit slower correct selection model rather like expert fisherman selecting right bait certain fish certain river no such thing universal worm beats fish universal combat model beats others another great advantage flat-section wing comes because constructional system allows variation overnight chord therefore area favorite design plastic tip jig can used out modification moving block plastic reduce length tip dur ing cutting As soon someone makes curved wing section problem lot difficult solve screws up airfoil percentages Having never flown Fast Combat fore sizing Fast version shot dark CG bit too far back -oz prop nut fitted Nats model bringing its weight up 19 Top Try Wilkie saying Weighing less 18 oz has wing/loading equivalent Nemesis Turns about 86 loops per minute Left Cardboard rocket tube can substi tuted pacifier pod shown Leading edge cut back spar locating mount January 1977 25 Fast Blasta oz for 460 sq model hol lowed out LE thicker spar web hollowed-out ribs center rib shown has lighter trail ing edge no full-span spruce thinner spar web selecting wood care fully weighs 17 oz further half oz could saved hollowing out thing could try trimming inch off front ribs reduce area speed speed turns still retain advantages structure turns about 86 loops per min ute 10% Nitro 9 X 6 Punchello wood orbits 107 mph level using British 3-strand CL wire motor 8-yearold Supertigre G21/35 modified model has wing loading equiva lent 127 oz Nemisis complete motor ready fly can imagine tight will turn have im agine because cannot build light get some idea its turn capa bility loops about two-thirds diam eter regular 330 sq hot ship lot fun fly interesting combat rules general opinion no substitute cubic inches brute horsepower over rules no substitute square inches few optional modifications model shown plan As life expectancy model between 10 seconds 5 minutes actual combat time solo flying opponents motor will start may want build 3/t-in wide center rib no ply cap strips cut lumps out plastic tips LE spar web ribs center rib etc Still use ers run out ply bearer strengthener use favorite card board roll instead pacifier pod shown want longer tube shift first outboard rib over bit will notice difference model flying have built six models con test two have great three have OK has useless usually due small CG upsets caused wood weight varying model model Plastic doesnt vary spruce varies little balsa varies lot further CG varies greater CG upset build Blastas batches four can cut balsa stripper shown plan four trailing edges 4 X As X 36 sheet set ribs 1/g X 3 sheet ribs too far CG four tails 4 X /8 X 36 sheet Models have similar weight distribution better still motor Expanded polystyrene L E tips permit mass production cheap reusable/replaceable components Top Start L E cut Middle First cut complete Left Leading edge com pletefour models buildable week 26 Model Aviation Above Cutting large slab plastic right size longer hot wire Note guides bat tery tapped 68 1OV Right T B Ready Cut tips Tip being cut 2 pix Tip finished about 20 seconds mount put last after model has covered motor position adjusted before fixing correct CG obtained model Also live very windy area States can stick motor mount l2O side-thrust extra line tension up wind Line tension another point considered because model loops tighter average centrifugal force reduced line whip increases inboard wing 2 inches longer outboard wing help solve prob lem because makes model tend roll out pilot flight attitudes Analyzing structure purpose leading-edge two-fold 1 has separate airflow front wing 2 must prevent wings clapping hands model does ioop polystyrene part cut hot wire simple jig method allows de sign own particular LE shape different wing thicknesses spar made three parts web /s-in balsa two spruce flanges resists bending shear forces imposed LE flight bending stress spar greatest wing root Therefore spruce flanges resist bending stresses taper root Vs X Y8 tips A-in sheet balsa web sized resist shear forces maximum tips cut same balsa stripper used cut ribs Another strip per used cut trailing edges yet another employed cut center rib build strippers push knife blade through lump /2 X 2 X 2/2 balsa point blade protrudes dis tance equal thickness wood intend cut epoxy place Epoxy scrap piece /s X hard balsa spruce distance blade tip equal width strip required slight diverging angle blade cutting direction angle makes sure blade does wan der sheet being stripped cut -in-thick balsa sheet mount blade January1977 27 -in protrusion cut side -in sheet Add Sello tape similar reduce friction strippers very easy make strips cut secondsall exactly same size polystyrene foam LE cut hot wire made piece old controlline wire heated 12V car battery Both 3- 7-strand Laystraight CL wire available Britain has used successfully see no reason scrap length 018 line cannot used 12V makes wire too hot can modify battery tap off 6 8 IOV required Obviously commercial expanded polystyrene wing cutter available model shops better outfit ex pensive Blasta leading edges up now have heen cut homemade ar rangement Build LE cutting jig shown plan -in ply blockboard chiphoard make sure distance tween 1/32-in ply LE templates 19 base Z plate should 11 ate between LE tem plates 1 e Y foam sits 9 X 22 X between two plates d tip jig making sure 1/16 ply wing section template cen terline same distance above base plate 1/16-in hole through ost post can lump engine bearer Tie another piece control-line wire /8-in ply hot-wire T handle pass through post hole tie post Get some cheap electrical flex suitable bedside lamps etc join end hot wire battery About 8 volts should enough cut tips section template should 1/32 bigger around wing section required width ply LE cutting tem plate shown plan LE hot wire frame made X 1 soft pine upright arm H frame made pivot fixing cross member single screw nail bolt Knock nail top bot tom uprights Tie CL hot wire bottom two nails elastic between top pair tension wire elec tric flex about 6 ft used connect end hot wire battery screws cutter ready use Expanded polystyrene available country insulation contractors lo cated checking phone book will probably available 8 X 4 eets enough last year two Cut block 18 x 12 X 2 lay LE jig between templates practice cutting probably best cut down wards side templates gives better shape cut tips lay hot wire base plate behind template mounting post place 4 X 11 X 2 block against wing section template Run hot wire round template pulling time gently wire keep taut hesitate stop anywhere otherwise FASTaLASTA mDaYMOdW WLKENJ Shoot hobo 000 onootw 800 tp 3on4 w00d tn*obw 0m td00 ot.00 0000 nooton nonot000 otozIij noaonboIo0oo. b00 I0LEotIon t no tong 0000 on 001 thoonhnotd noo woo -Optonwt to0owod fi b000 0 900Ot ~o80oott b0onob Iwhq oopatooon hothod L 2 Towbog odgo donf boo onnoowit 000000 pI pbotofiono.0n0Ob __________Li Enpo boonon oooon00y onnotnootton0totOO oonoit000000gpgNALLE 4oott O anot w**on dy nito tonSSr35 Con 0000 no00110 ton LI] oofltg b0on otooP7 0th 0opay ononoononnt st-i Oqoonooglo ffrConto owotion ofrootiti 0 oott 0000- Zonqit Tqo*O00Wq - ton dw00L[T ibdnwbwwodo l -PoOIOon tonb IdfonlOowod tm 34 1n Eloblo twonon hd00 wobon -Ahod,obonth itobon 23 22 ISO 1oonbottony Pt ton0Iotodonononi X plot nwonobo b 000 nob 4Eho1 ton ST Ost 58 olonob 0 p1000 0ho0 000 ob Enwot pOditwo 100th 7 onEt hobo 2nqkwd00*1010I t hdt KooOo towikon oton 000 %obloopoon nontro ootnn3oaonnolo niton on0010 1ooply boiwonk ion ob*onwi -tdOTE LEoontonono ion 0000 nob 0000 nonnE 0 0oott 000000000000 000000t TopIon ply ono 00np on0 00 000000 towo 000 000* ro-notonownont 0*0 000000 WinO o00 000 tot oft ototog 0000000 *00w. 000 ooottod OpOonlolTE totnh onowoqo 0 0000 0 t b000 p000000 pOd 2oqbod Solontknon two toning ModIfy No 510 non, 00dm Sddqoo WnoOqtottO tW IolobtopS ton p00000BbotOon 28 Model Aviation Fl Eooqtoot0 /tboon SootnTE i ottod 30000 O00 10 0d.p 0 ton t odotkotfn000t 0opltn groove will melted surface tipwhich does matter much unless leading edge Once wire has pulled right round template move plastic forward about 1 lift block up away jig tip will fall out block will take long cut enough five ten models after experimenting bit different voltages wont cost much either model like others will prob ably break hits ground spruce center-section strengtheners stop abruptly along leading trailing edges attempt encourage wing snap points repairs easy instead next center rib may like encourage break notching TE points must point out however idea no proof will work should able make both jigs convert battery experiment bplyooototboodK plyooolokbodteoley e 000 oertdOhOt0t Ik-Soolto 7 I. gdeoe P0 Optod holbeed OOt p 5 OOly pO0teo pod olg Oqed khdlo hole doot hole 10 lb poeltoe edOptloeol Ighteleeg 1000 kotid 100g ot tot tho loWO Ore rO ototeeootoO5oOV eyoo Ipem eeerdttd eye Ioeg tot tt eev different voltages cut enough leading edge section tips four models couple evenings Once rib template balsa strippers engine bearer drill ing jig have made ready mass production Construction Make sign saying model am taking hours construct may last 10 seconds combat Now make another saying model 60 ft away flying 100 mph engaged combat will notice effect extra work Pin up above workbench remind spend time fiddling about silly details will assume going make four models combat next weekend Monday evening have already built jigs templates have pile tips LE sections Grab very light X 4 X 36 balsa sheet mark rib positions right across over plan using square trailing edge stripper strip four strips razor-plane chamfer rear /4 trailing edge sharp point leaving center section square meets tail plane Cut four 9 X / X ce strips 36-in length white glue Sellotape fix trailing edge position shown plan Sellotape holds spruce position glue drying bother remove tape read sign 2 Mark rib positions two 3 X 1/i X 36 sheets balsa strip 1/2-in strips rib stripper four strips become spar webs Strip four 3 X /i X 36 sheets down middle same stripper 9-inlong rib template laid top strips cut rib tapers TE notch Use template mark front rib Remove template place small metal square strip cut rib free simple perfectly accurate cross cut Only 31 go Take two /s X /s spruce strips hack taper end both measure /i square tips glue webs white glue epoxy clamping about 20 spring clothes pins like can set about 1/64 edges web save having get perfect edge alignment Fit two /i X /8 centersection reinforcing spruce strips other side web set aside dry Modify No 5 rib front fit web same other three spars Cut balsa center rib center rib stripper Cut tapers crank mount holes TE tail notches center rib 12 long continued page 9] January 1977 29 31h I. 2 jeokee oP otttoeoketloedeg ge - PIOokOtOooOo Ootteg pg e0g hod reh Wilkens left Frank Smart holding two FAI planes just show big much Fast Blasta like Airfoil plans left self jigging flies very well Lhooflleg -be 2eqked Shereshaws beautiful big cabin machine Gene has 24 ready go Shortly will shipping parts kits Dallaire Sportster won RC Antique 76 SAM Champs Trenton Ter ror Miss America beautiful sevenfoot Buccaneer Super Buccaneer oldies goodies biggies Postscripts will end up months column bi-monthly plea puts readers Next column will report results Scotty Mur ray Memorial Annual Pensacola Although home still Pensa cola am working Washington DC Please address correspondence Jack Bolton 8W7 Ferncl CL Spring field VA 22153 phone 703 455-3089 please include SASE Fast Blasta/Wilkens continued page 29 yougetsixoutofa3 X sheet Cut 1/32 ply cap strips top incorporates pushrod slot White glue Sellotape again Tuesday Cut A-in ply crank mounts drill crank bolt holes suit 3-in belicrank mounting bolts British Micromold 3 nylon crank shown plan crank can used use pushrod hole nearest bolt Insert crank bolts add cranks leadouts pushrods Make Z-bend 1/16 music wire prevent falling out crank Cut out four delta tails 4 X 36 X /s soft balsa sheet extend front tail adding 1 X /i balsa strip tail use 5-in sheet can buy Cut Y8-in soft balsa elevators round off edges sandpaper No fancy airfoilsread signs tailplane flat edge table elevator right angles down over table edge stick top I-in wide Sellotape hinge pressing tape crack Turn lot over repeat operation Bend elevator up down dozen times check hinge OK cover side tail elevator single piece Fascal Solarfilm again elevator right angles tail Turn over re peat Number ribs cut leadout holes Use white glue Hot Stuff assembly components except LEs tips may fixed Hot Stuff First stick ribs including center ribs onto trailing edges using plan guide Remove pegs spars lay spars front end down build ing board up end rib/TE assem blies dropping vertically posi tion spars crosspinning ribs white glue sets Make sure tip ribs square spar viewed rear otherwise may get unwanted tip dihedral Remove some covering tailplanes touch center ribs cut out 1/16-in balsa tail packing pieces glue tailplanes glue tailplanes center ribs TEs should have spent eight hours total time reaching stage White glue Sellotape pin LE section place trim ends flush tip ribs using knife razorplane new blade Make leadout holes through inboard tips rat-tail file use hot pushrod melt /8-in dia hole takes practice try first scrap chunk foam go I-in long /8-in dia aluminum brass copper leadout tubes Epoxy place smear epoxy round holes round edge tip reinforce plastic shown plan Fix tips place epoxy white glue Wednesday go control assem blies X 1/32 ply bellcrank stops center-section sheeting Make up pacifier pods fix place add covering support strips /s balsa After removing some covering elevator epoxy 1/32-ply horn mount ing plates place Add balsa tip gusJanuary 1977 91 SoIuFiIm TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA CN AA HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS Aena HOT FUEL PROOF DOPE AWARD WINNING HI-GLOSS AND FLAT FINISHES AVAILABLE IN OVER 36 COLORS IN BRUSH AND SPRAY ptIia Industries InC 7060 HOLLYWOOD BLvD. LOS ANGELES CA 90028 sets sandpaper frame smooth spend ing about five minutes model much sandpaper Add Fascal Solarfilm tail fairings top bottom Thursday Test iron temperature scrap chunk plastic melt LE tips cover models using separate pieces tips Note cannot cover model silk paper nylon because dope melts polystyrene suppose could cover tips LE first paper glued diluted white glue worth time Remember heat melts polysty rene Go steady heat gun iron shrinking covering Dewarping wing over gas stove front electric fire bit risky unless mask LE tips heat sheet balsa chunk cardboard Friday Cut 1 1/32-in wide section leading edge away back spar al low motor mount butt up against remove some covering under bearers will fit wing 1/32-in ply plate eases construc tion increases strength mo tor mounts Mark bearer spacer positions ply build engine bearer assemblies Trim ply away tween bearers fit over wing spar Sellotape nacelles assemblies along motor prop motor-mount bolts nuts plates Slide assembly onto model test CO pins set back leading edge shown plan Adjust motor position obtain CO trimming bearer spacers leading edge re B Pwher7 4 7 6 78 50% SrZeseach84 86 88 65% 5/3 5y0494 96 97 98 63 64 30%i04 10685% 8685%114 116 11-8 961065i 3 BlaJe Trtor 5354 63 6-4 50% 3 BIde Posher 6350% RC 124 125 176150 ORISH BROS ST jOHN INDIANA 46373 quired Remove assembly Drill bolt holes Using drilling jig guide fit some 4-40 blind-mounting nuts epoxy nacelle bearer assemblies complete mounts wings Side-thrust easily obtained want sticking mounts 10 20 offset necessary un less fly very windy conditions Drill 3/16-in hole right through bearers center rib crank mount shown plan insert 3/16-in dia dowel prevents crank mount leaving model during pull test Repeat procedure three other models /8 dural engine mounting plates shown plan cut down vibration make unnecessary cut ply under crankcase glued bearers motor Two coats dope fuel proof er applied mounts after epoxy fillet has smeared round motormount/leading-edge joint prevent gress polystyrene solvents dope glass fiber resin Glass fiber need applied ply stops bearers cracking up Fuel-proof 1/32 ply horn mounting plates elevator fuel-proof Inside fuel pod Saturday morning Youve done very well considering arent familiar model have now fit nylon control horn Kavan medium shown connect Kwik-Link pushrod horn Dewarp model before flying using steam kettle heat gun Flying Fly model level check isnt banking out Fly inverted check same line tension differ ent now outboard tip visible missed removing warp Remove fore flying tight turns model may crash warps have removed fly wide consecutive loops tighten up much possible Note whether outboard wing suddenly drops flies wider 1oops inboard wing simultaneous 15-20% reduction airspeed happens wing has stalled because too much elevator movement Try same procedure outsides before landing drops wing 1oop direction reduce ele vator throw stalling direction refly still stalls move link higher hole horn will need elevator movement windy days satisfied turn per formance add weight tail until Wrap solder round horn make sure model doesnt become di rectionally unstable after doing must still able flicked rocksteady level flight may advantageous building batch models test fly find CO position suits best before glucing motor mounts other models chaps know much about Honking 35s must ex periment find best prop fuel suit needs model intended fly super fast intended turn prop fit must lesser pitch normally use motor right gear sharp corners used 9/6 Rev Up wood Nats 20% fuel got about 95 100 mph level turned about same speed honking streamlined ships Practice Flying universal defense maneuver wiggle whereby model flown zig zag flight path towards ground wingover model directly overhead fly Fig 1 dozen times check gap FIG 1 12 FT GAP CRflI INn should big enough fit least half-loop aim re duce 1-2 ft starting pattern 4 FIG 2 4 92 Model Aviation MORE wMTCC taster ofl same power YELLOW PROPELI G08eesed e~o ~O9 o ADE Metallic Alumiuum S 8W 8-6 88 125 96 106 104 150 106Poshee CtVV150 Fast Blasta continued N WSPAPER mm IIVDP hobby centerinc bit lower time inverted wingovers wiggle up down 455 axis finally dog-leg axis Fig 2 five points maneuver model changes its ioop direction points loop may continued round position behind opposition five opportunities occur ring two seconds throughout match will long before following opponent Remember speed side flying level model much slower its smaller streamlined cousin enough prevent making get-away level flight So instead trying imitate jet anyone can predict therefore intercept must fly model wasp buzzing round jar honey make almost impossible opponent zero accurate ly fly level 1/10 second otherwise some whizz kid will convince himself sitting duck turnspeed probably equal pos sibly better opponent turn radius smaller model capable staying behind others day up put worst thing can lose sight target close following reduces chance happening enormously Watch opponents model copy everything does does matter very close behind him first can cut corners close gap after first couple turns try cuts back streamer Remem ber cannot line up until quit following quit have worry much about line tangles opponent expert flier will prob ably lead Close following again helps sort out line tangle does occur because easier remember flew mutual cooperation can fly out way flew theory anyway forget kill ahead points model sprayed-on color doped finish prefer have brownline run off original vellum manner keep original copies course same Thus draw ing insignia little off scale some dimensions will least uniform brownline first backed adhesive transfer tape colored felt-tip pen Except white use latex white-out After colors successfully done cut out patch peel off tape backing have applique model has colored Japanese tissue finish applique can made using Japanese tissue keep feel model constant would keeping see-through look lightly constructed model Searching good documentation particular aircraft may well lead finding building another interesting model have built decorated model liked built again improve ments flying dr changes struc ture decorated another color scheme second time have same basic airplane completely different model WHEN FIRST started column stated rules would discussed Well shanie having known 4 OlWELL T4ATh ONL MNE INCI4ES ON ThE TALE MAP rule book error rubber scale scoring Rule 507 remember pro posal total score being lower two scale judging flight points seeing book assumed pro posal passed intent proposing using lower score eliminate ghost ships scale competition However just doesnt work way flying conditions bad flight scores will low model wont fly well because spectator damage com plexity choice subject builder re ceives no reward scale con struction effort believe because scale events events reward builder workmanship scale fidelity flying ability three areas should equally considered determining winners fore have submitted rules change pro posal limiting maximum flight points same fifty 50 given workmanship scale fidelity should make opinions proposal known district scale contest board member Ralph D Kuenz 14645 Stahelin De troit Mich 48223 January 1977 93 Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground Price $3495 kit per doUar bar em GREATEST R/C SSBASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andrews Aircraft Modri co Inc 155 Rte 1& North St Topafield Mass 01983 8878541 Support AMA FF Scale/Kuenz continued page 40 Delicate looking Castalbert IV Peanut Old Timer built Stan Fink Walt Mooney plans Photo Carol Cogswell
Edition: Model Aviation - 1977/01
Page Numbers: 25, 26, 27, 28, 29, 91, 92, 93
FAST DL Richard Wilkens THE IDEA THAT should enter 1975 US Nats came Charlie Johnson Gary Frost met British Nats May 1975 already booked peaceful hitchhike tour little old country yours Charlie suggested should visit him Cali fornia before Nats boxed five FAI Blastas left over British Interna tional headed West Charlie Lorna gave plenty advice Fast Com bat hadnt would have doubtful could have entered Nats scaled up 400 sq FAT Blasta California result now consider ably improved appears article original after having miraculously sur vived two mid-air collisions scoring lucky kill second round smashed during fly-off match 5th place against Greg Hissem flying bit too well Editors Note Keep mind flying Fast rules new experience Wilkens comparable US modeler flying FAT rules interna tional competition Compared Fast ships chaps used seeing huge flat-section wing makes flight mula manuals curl up edges dis covered 1965 Britain since 99% British models have used type section advantages models go together extremely quickly cause selfjigging can built flat building board easy repair motor mounts tips tails can reused model gets smashed structure makes easy model formed two broken ones has fewer components its US cousin very few precision fits required during assembly Blasta expanded polystyrene lead ing edge tips 1975 invention worlds respected FAI combat fliers adapts famous Blasta American Fast Combat rules allows mass produce very cheaply identical reusable/replaceable components crushed LE example can cut off replaced field tween matches one-piece tips copy wing section taper produce liftproducing section beyond 36-in balsa frame Tips like may made wing section fitted model thus increasing its aspect ratio reducing induced drag wing may also hollowed out hot knife make super light Britain contest held week between March October country about size Illinois no has far travel Everyone enters contests possible limiting factor ing quickly can replenish stock models US structures thus totally impractical over take too long build Vampires Shrika IIs excepted Because fliers meet nearly week some often take two three differ ent size models along contest may select fly against par ticular opponent hoping out turn model small amount about same speedperhaps bit slower correct selection model rather like expert fisherman selecting right bait certain fish certain river no such thing universal worm beats fish universal combat model beats others another great advantage flat-section wing comes because constructional system allows variation overnight chord therefore area favorite design plastic tip jig can used out modification moving block plastic reduce length tip dur ing cutting As soon someone makes curved wing section problem lot difficult solve screws up airfoil percentages Having never flown Fast Combat fore sizing Fast version shot dark CG bit too far back -oz prop nut fitted Nats model bringing its weight up 19 Top Try Wilkie saying Weighing less 18 oz has wing/loading equivalent Nemesis Turns about 86 loops per minute Left Cardboard rocket tube can substi tuted pacifier pod shown Leading edge cut back spar locating mount January 1977 25 Fast Blasta oz for 460 sq model hol lowed out LE thicker spar web hollowed-out ribs center rib shown has lighter trail ing edge no full-span spruce thinner spar web selecting wood care fully weighs 17 oz further half oz could saved hollowing out thing could try trimming inch off front ribs reduce area speed speed turns still retain advantages structure turns about 86 loops per min ute 10% Nitro 9 X 6 Punchello wood orbits 107 mph level using British 3-strand CL wire motor 8-yearold Supertigre G21/35 modified model has wing loading equiva lent 127 oz Nemisis complete motor ready fly can imagine tight will turn have im agine because cannot build light get some idea its turn capa bility loops about two-thirds diam eter regular 330 sq hot ship lot fun fly interesting combat rules general opinion no substitute cubic inches brute horsepower over rules no substitute square inches few optional modifications model shown plan As life expectancy model between 10 seconds 5 minutes actual combat time solo flying opponents motor will start may want build 3/t-in wide center rib no ply cap strips cut lumps out plastic tips LE spar web ribs center rib etc Still use ers run out ply bearer strengthener use favorite card board roll instead pacifier pod shown want longer tube shift first outboard rib over bit will notice difference model flying have built six models con test two have great three have OK has useless usually due small CG upsets caused wood weight varying model model Plastic doesnt vary spruce varies little balsa varies lot further CG varies greater CG upset build Blastas batches four can cut balsa stripper shown plan four trailing edges 4 X As X 36 sheet set ribs 1/g X 3 sheet ribs too far CG four tails 4 X /8 X 36 sheet Models have similar weight distribution better still motor Expanded polystyrene L E tips permit mass production cheap reusable/replaceable components Top Start L E cut Middle First cut complete Left Leading edge com pletefour models buildable week 26 Model Aviation Above Cutting large slab plastic right size longer hot wire Note guides bat tery tapped 68 1OV Right T B Ready Cut tips Tip being cut 2 pix Tip finished about 20 seconds mount put last after model has covered motor position adjusted before fixing correct CG obtained model Also live very windy area States can stick motor mount l2O side-thrust extra line tension up wind Line tension another point considered because model loops tighter average centrifugal force reduced line whip increases inboard wing 2 inches longer outboard wing help solve prob lem because makes model tend roll out pilot flight attitudes Analyzing structure purpose leading-edge two-fold 1 has separate airflow front wing 2 must prevent wings clapping hands model does ioop polystyrene part cut hot wire simple jig method allows de sign own particular LE shape different wing thicknesses spar made three parts web /s-in balsa two spruce flanges resists bending shear forces imposed LE flight bending stress spar greatest wing root Therefore spruce flanges resist bending stresses taper root Vs X Y8 tips A-in sheet balsa web sized resist shear forces maximum tips cut same balsa stripper used cut ribs Another strip per used cut trailing edges yet another employed cut center rib build strippers push knife blade through lump /2 X 2 X 2/2 balsa point blade protrudes dis tance equal thickness wood intend cut epoxy place Epoxy scrap piece /s X hard balsa spruce distance blade tip equal width strip required slight diverging angle blade cutting direction angle makes sure blade does wan der sheet being stripped cut -in-thick balsa sheet mount blade January1977 27 -in protrusion cut side -in sheet Add Sello tape similar reduce friction strippers very easy make strips cut secondsall exactly same size polystyrene foam LE cut hot wire made piece old controlline wire heated 12V car battery Both 3- 7-strand Laystraight CL wire available Britain has used successfully see no reason scrap length 018 line cannot used 12V makes wire too hot can modify battery tap off 6 8 IOV required Obviously commercial expanded polystyrene wing cutter available model shops better outfit ex pensive Blasta leading edges up now have heen cut homemade ar rangement Build LE cutting jig shown plan -in ply blockboard chiphoard make sure distance tween 1/32-in ply LE templates 19 base Z plate should 11 ate between LE tem plates 1 e Y foam sits 9 X 22 X between two plates d tip jig making sure 1/16 ply wing section template cen terline same distance above base plate 1/16-in hole through ost post can lump engine bearer Tie another piece control-line wire /8-in ply hot-wire T handle pass through post hole tie post Get some cheap electrical flex suitable bedside lamps etc join end hot wire battery About 8 volts should enough cut tips section template should 1/32 bigger around wing section required width ply LE cutting tem plate shown plan LE hot wire frame made X 1 soft pine upright arm H frame made pivot fixing cross member single screw nail bolt Knock nail top bot tom uprights Tie CL hot wire bottom two nails elastic between top pair tension wire elec tric flex about 6 ft used connect end hot wire battery screws cutter ready use Expanded polystyrene available country insulation contractors lo cated checking phone book will probably available 8 X 4 eets enough last year two Cut block 18 x 12 X 2 lay LE jig between templates practice cutting probably best cut down wards side templates gives better shape cut tips lay hot wire base plate behind template mounting post place 4 X 11 X 2 block against wing section template Run hot wire round template pulling time gently wire keep taut hesitate stop anywhere otherwise FASTaLASTA mDaYMOdW WLKENJ Shoot hobo 000 onootw 800 tp 3on4 w00d tn*obw 0m td00 ot.00 0000 nooton nonot000 otozIij noaonboIo0oo. b00 I0LEotIon t no tong 0000 on 001 thoonhnotd noo woo -Optonwt to0owod fi b000 0 900Ot ~o80oott b0onob Iwhq oopatooon hothod L 2 Towbog odgo donf boo onnoowit 000000 pI pbotofiono.0n0Ob __________Li Enpo boonon oooon00y onnotnootton0totOO oonoit000000gpgNALLE 4oott O anot w**on dy nito tonSSr35 Con 0000 no00110 ton LI] oofltg b0on otooP7 0th 0opay ononoononnt st-i Oqoonooglo ffrConto owotion ofrootiti 0 oott 0000- Zonqit Tqo*O00Wq - ton dw00L[T ibdnwbwwodo l -PoOIOon tonb IdfonlOowod tm 34 1n Eloblo twonon hd00 wobon -Ahod,obonth itobon 23 22 ISO 1oonbottony Pt ton0Iotodonononi X plot nwonobo b 000 nob 4Eho1 ton ST Ost 58 olonob 0 p1000 0ho0 000 ob Enwot pOditwo 100th 7 onEt hobo 2nqkwd00*1010I t hdt KooOo towikon oton 000 %obloopoon nontro ootnn3oaonnolo niton on0010 1ooply boiwonk ion ob*onwi -tdOTE LEoontonono ion 0000 nob 0000 nonnE 0 0oott 000000000000 000000t TopIon ply ono 00np on0 00 000000 towo 000 000* ro-notonownont 0*0 000000 WinO o00 000 tot oft ototog 0000000 *00w. 000 ooottod OpOonlolTE totnh onowoqo 0 0000 0 t b000 p000000 pOd 2oqbod Solontknon two toning ModIfy No 510 non, 00dm Sddqoo WnoOqtottO tW IolobtopS ton p00000BbotOon 28 Model Aviation Fl Eooqtoot0 /tboon SootnTE i ottod 30000 O00 10 0d.p 0 ton t odotkotfn000t 0opltn groove will melted surface tipwhich does matter much unless leading edge Once wire has pulled right round template move plastic forward about 1 lift block up away jig tip will fall out block will take long cut enough five ten models after experimenting bit different voltages wont cost much either model like others will prob ably break hits ground spruce center-section strengtheners stop abruptly along leading trailing edges attempt encourage wing snap points repairs easy instead next center rib may like encourage break notching TE points must point out however idea no proof will work should able make both jigs convert battery experiment bplyooototboodK plyooolokbodteoley e 000 oertdOhOt0t Ik-Soolto 7 I. gdeoe P0 Optod holbeed OOt p 5 OOly pO0teo pod olg Oqed khdlo hole doot hole 10 lb poeltoe edOptloeol Ighteleeg 1000 kotid 100g ot tot tho loWO Ore rO ototeeootoO5oOV eyoo Ipem eeerdttd eye Ioeg tot tt eev different voltages cut enough leading edge section tips four models couple evenings Once rib template balsa strippers engine bearer drill ing jig have made ready mass production Construction Make sign saying model am taking hours construct may last 10 seconds combat Now make another saying model 60 ft away flying 100 mph engaged combat will notice effect extra work Pin up above workbench remind spend time fiddling about silly details will assume going make four models combat next weekend Monday evening have already built jigs templates have pile tips LE sections Grab very light X 4 X 36 balsa sheet mark rib positions right across over plan using square trailing edge stripper strip four strips razor-plane chamfer rear /4 trailing edge sharp point leaving center section square meets tail plane Cut four 9 X / X ce strips 36-in length white glue Sellotape fix trailing edge position shown plan Sellotape holds spruce position glue drying bother remove tape read sign 2 Mark rib positions two 3 X 1/i X 36 sheets balsa strip 1/2-in strips rib stripper four strips become spar webs Strip four 3 X /i X 36 sheets down middle same stripper 9-inlong rib template laid top strips cut rib tapers TE notch Use template mark front rib Remove template place small metal square strip cut rib free simple perfectly accurate cross cut Only 31 go Take two /s X /s spruce strips hack taper end both measure /i square tips glue webs white glue epoxy clamping about 20 spring clothes pins like can set about 1/64 edges web save having get perfect edge alignment Fit two /i X /8 centersection reinforcing spruce strips other side web set aside dry Modify No 5 rib front fit web same other three spars Cut balsa center rib center rib stripper Cut tapers crank mount holes TE tail notches center rib 12 long continued page 9] January 1977 29 31h I. 2 jeokee oP otttoeoketloedeg ge - PIOokOtOooOo Ootteg pg e0g hod reh Wilkens left Frank Smart holding two FAI planes just show big much Fast Blasta like Airfoil plans left self jigging flies very well Lhooflleg -be 2eqked Shereshaws beautiful big cabin machine Gene has 24 ready go Shortly will shipping parts kits Dallaire Sportster won RC Antique 76 SAM Champs Trenton Ter ror Miss America beautiful sevenfoot Buccaneer Super Buccaneer oldies goodies biggies Postscripts will end up months column bi-monthly plea puts readers Next column will report results Scotty Mur ray Memorial Annual Pensacola Although home still Pensa cola am working Washington DC Please address correspondence Jack Bolton 8W7 Ferncl CL Spring field VA 22153 phone 703 455-3089 please include SASE Fast Blasta/Wilkens continued page 29 yougetsixoutofa3 X sheet Cut 1/32 ply cap strips top incorporates pushrod slot White glue Sellotape again Tuesday Cut A-in ply crank mounts drill crank bolt holes suit 3-in belicrank mounting bolts British Micromold 3 nylon crank shown plan crank can used use pushrod hole nearest bolt Insert crank bolts add cranks leadouts pushrods Make Z-bend 1/16 music wire prevent falling out crank Cut out four delta tails 4 X 36 X /s soft balsa sheet extend front tail adding 1 X /i balsa strip tail use 5-in sheet can buy Cut Y8-in soft balsa elevators round off edges sandpaper No fancy airfoilsread signs tailplane flat edge table elevator right angles down over table edge stick top I-in wide Sellotape hinge pressing tape crack Turn lot over repeat operation Bend elevator up down dozen times check hinge OK cover side tail elevator single piece Fascal Solarfilm again elevator right angles tail Turn over re peat Number ribs cut leadout holes Use white glue Hot Stuff assembly components except LEs tips may fixed Hot Stuff First stick ribs including center ribs onto trailing edges using plan guide Remove pegs spars lay spars front end down build ing board up end rib/TE assem blies dropping vertically posi tion spars crosspinning ribs white glue sets Make sure tip ribs square spar viewed rear otherwise may get unwanted tip dihedral Remove some covering tailplanes touch center ribs cut out 1/16-in balsa tail packing pieces glue tailplanes glue tailplanes center ribs TEs should have spent eight hours total time reaching stage White glue Sellotape pin LE section place trim ends flush tip ribs using knife razorplane new blade Make leadout holes through inboard tips rat-tail file use hot pushrod melt /8-in dia hole takes practice try first scrap chunk foam go I-in long /8-in dia aluminum brass copper leadout tubes Epoxy place smear epoxy round holes round edge tip reinforce plastic shown plan Fix tips place epoxy white glue Wednesday go control assem blies X 1/32 ply bellcrank stops center-section sheeting Make up pacifier pods fix place add covering support strips /s balsa After removing some covering elevator epoxy 1/32-ply horn mount ing plates place Add balsa tip gusJanuary 1977 91 SoIuFiIm TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA CN AA HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS Aena HOT FUEL PROOF DOPE AWARD WINNING HI-GLOSS AND FLAT FINISHES AVAILABLE IN OVER 36 COLORS IN BRUSH AND SPRAY ptIia Industries InC 7060 HOLLYWOOD BLvD. LOS ANGELES CA 90028 sets sandpaper frame smooth spend ing about five minutes model much sandpaper Add Fascal Solarfilm tail fairings top bottom Thursday Test iron temperature scrap chunk plastic melt LE tips cover models using separate pieces tips Note cannot cover model silk paper nylon because dope melts polystyrene suppose could cover tips LE first paper glued diluted white glue worth time Remember heat melts polysty rene Go steady heat gun iron shrinking covering Dewarping wing over gas stove front electric fire bit risky unless mask LE tips heat sheet balsa chunk cardboard Friday Cut 1 1/32-in wide section leading edge away back spar al low motor mount butt up against remove some covering under bearers will fit wing 1/32-in ply plate eases construc tion increases strength mo tor mounts Mark bearer spacer positions ply build engine bearer assemblies Trim ply away tween bearers fit over wing spar Sellotape nacelles assemblies along motor prop motor-mount bolts nuts plates Slide assembly onto model test CO pins set back leading edge shown plan Adjust motor position obtain CO trimming bearer spacers leading edge re B Pwher7 4 7 6 78 50% SrZeseach84 86 88 65% 5/3 5y0494 96 97 98 63 64 30%i04 10685% 8685%114 116 11-8 961065i 3 BlaJe Trtor 5354 63 6-4 50% 3 BIde Posher 6350% RC 124 125 176150 ORISH BROS ST jOHN INDIANA 46373 quired Remove assembly Drill bolt holes Using drilling jig guide fit some 4-40 blind-mounting nuts epoxy nacelle bearer assemblies complete mounts wings Side-thrust easily obtained want sticking mounts 10 20 offset necessary un less fly very windy conditions Drill 3/16-in hole right through bearers center rib crank mount shown plan insert 3/16-in dia dowel prevents crank mount leaving model during pull test Repeat procedure three other models /8 dural engine mounting plates shown plan cut down vibration make unnecessary cut ply under crankcase glued bearers motor Two coats dope fuel proof er applied mounts after epoxy fillet has smeared round motormount/leading-edge joint prevent gress polystyrene solvents dope glass fiber resin Glass fiber need applied ply stops bearers cracking up Fuel-proof 1/32 ply horn mounting plates elevator fuel-proof Inside fuel pod Saturday morning Youve done very well considering arent familiar model have now fit nylon control horn Kavan medium shown connect Kwik-Link pushrod horn Dewarp model before flying using steam kettle heat gun Flying Fly model level check isnt banking out Fly inverted check same line tension differ ent now outboard tip visible missed removing warp Remove fore flying tight turns model may crash warps have removed fly wide consecutive loops tighten up much possible Note whether outboard wing suddenly drops flies wider 1oops inboard wing simultaneous 15-20% reduction airspeed happens wing has stalled because too much elevator movement Try same procedure outsides before landing drops wing 1oop direction reduce ele vator throw stalling direction refly still stalls move link higher hole horn will need elevator movement windy days satisfied turn per formance add weight tail until Wrap solder round horn make sure model doesnt become di rectionally unstable after doing must still able flicked rocksteady level flight may advantageous building batch models test fly find CO position suits best before glucing motor mounts other models chaps know much about Honking 35s must ex periment find best prop fuel suit needs model intended fly super fast intended turn prop fit must lesser pitch normally use motor right gear sharp corners used 9/6 Rev Up wood Nats 20% fuel got about 95 100 mph level turned about same speed honking streamlined ships Practice Flying universal defense maneuver wiggle whereby model flown zig zag flight path towards ground wingover model directly overhead fly Fig 1 dozen times check gap FIG 1 12 FT GAP CRflI INn should big enough fit least half-loop aim re duce 1-2 ft starting pattern 4 FIG 2 4 92 Model Aviation MORE wMTCC taster ofl same power YELLOW PROPELI G08eesed e~o ~O9 o ADE Metallic Alumiuum S 8W 8-6 88 125 96 106 104 150 106Poshee CtVV150 Fast Blasta continued N WSPAPER mm IIVDP hobby centerinc bit lower time inverted wingovers wiggle up down 455 axis finally dog-leg axis Fig 2 five points maneuver model changes its ioop direction points loop may continued round position behind opposition five opportunities occur ring two seconds throughout match will long before following opponent Remember speed side flying level model much slower its smaller streamlined cousin enough prevent making get-away level flight So instead trying imitate jet anyone can predict therefore intercept must fly model wasp buzzing round jar honey make almost impossible opponent zero accurate ly fly level 1/10 second otherwise some whizz kid will convince himself sitting duck turnspeed probably equal pos sibly better opponent turn radius smaller model capable staying behind others day up put worst thing can lose sight target close following reduces chance happening enormously Watch opponents model copy everything does does matter very close behind him first can cut corners close gap after first couple turns try cuts back streamer Remem ber cannot line up until quit following quit have worry much about line tangles opponent expert flier will prob ably lead Close following again helps sort out line tangle does occur because easier remember flew mutual cooperation can fly out way flew theory anyway forget kill ahead points model sprayed-on color doped finish prefer have brownline run off original vellum manner keep original copies course same Thus draw ing insignia little off scale some dimensions will least uniform brownline first backed adhesive transfer tape colored felt-tip pen Except white use latex white-out After colors successfully done cut out patch peel off tape backing have applique model has colored Japanese tissue finish applique can made using Japanese tissue keep feel model constant would keeping see-through look lightly constructed model Searching good documentation particular aircraft may well lead finding building another interesting model have built decorated model liked built again improve ments flying dr changes struc ture decorated another color scheme second time have same basic airplane completely different model WHEN FIRST started column stated rules would discussed Well shanie having known 4 OlWELL T4ATh ONL MNE INCI4ES ON ThE TALE MAP rule book error rubber scale scoring Rule 507 remember pro posal total score being lower two scale judging flight points seeing book assumed pro posal passed intent proposing using lower score eliminate ghost ships scale competition However just doesnt work way flying conditions bad flight scores will low model wont fly well because spectator damage com plexity choice subject builder re ceives no reward scale con struction effort believe because scale events events reward builder workmanship scale fidelity flying ability three areas should equally considered determining winners fore have submitted rules change pro posal limiting maximum flight points same fifty 50 given workmanship scale fidelity should make opinions proposal known district scale contest board member Ralph D Kuenz 14645 Stahelin De troit Mich 48223 January 1977 93 Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground Price $3495 kit per doUar bar em GREATEST R/C SSBASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andrews Aircraft Modri co Inc 155 Rte 1& North St Topafield Mass 01983 8878541 Support AMA FF Scale/Kuenz continued page 40 Delicate looking Castalbert IV Peanut Old Timer built Stan Fink Walt Mooney plans Photo Carol Cogswell
Edition: Model Aviation - 1977/01
Page Numbers: 25, 26, 27, 28, 29, 91, 92, 93
FAST DL Richard Wilkens THE IDEA THAT should enter 1975 US Nats came Charlie Johnson Gary Frost met British Nats May 1975 already booked peaceful hitchhike tour little old country yours Charlie suggested should visit him Cali fornia before Nats boxed five FAI Blastas left over British Interna tional headed West Charlie Lorna gave plenty advice Fast Com bat hadnt would have doubtful could have entered Nats scaled up 400 sq FAT Blasta California result now consider ably improved appears article original after having miraculously sur vived two mid-air collisions scoring lucky kill second round smashed during fly-off match 5th place against Greg Hissem flying bit too well Editors Note Keep mind flying Fast rules new experience Wilkens comparable US modeler flying FAT rules interna tional competition Compared Fast ships chaps used seeing huge flat-section wing makes flight mula manuals curl up edges dis covered 1965 Britain since 99% British models have used type section advantages models go together extremely quickly cause selfjigging can built flat building board easy repair motor mounts tips tails can reused model gets smashed structure makes easy model formed two broken ones has fewer components its US cousin very few precision fits required during assembly Blasta expanded polystyrene lead ing edge tips 1975 invention worlds respected FAI combat fliers adapts famous Blasta American Fast Combat rules allows mass produce very cheaply identical reusable/replaceable components crushed LE example can cut off replaced field tween matches one-piece tips copy wing section taper produce liftproducing section beyond 36-in balsa frame Tips like may made wing section fitted model thus increasing its aspect ratio reducing induced drag wing may also hollowed out hot knife make super light Britain contest held week between March October country about size Illinois no has far travel Everyone enters contests possible limiting factor ing quickly can replenish stock models US structures thus totally impractical over take too long build Vampires Shrika IIs excepted Because fliers meet nearly week some often take two three differ ent size models along contest may select fly against par ticular opponent hoping out turn model small amount about same speedperhaps bit slower correct selection model rather like expert fisherman selecting right bait certain fish certain river no such thing universal worm beats fish universal combat model beats others another great advantage flat-section wing comes because constructional system allows variation overnight chord therefore area favorite design plastic tip jig can used out modification moving block plastic reduce length tip dur ing cutting As soon someone makes curved wing section problem lot difficult solve screws up airfoil percentages Having never flown Fast Combat fore sizing Fast version shot dark CG bit too far back -oz prop nut fitted Nats model bringing its weight up 19 Top Try Wilkie saying Weighing less 18 oz has wing/loading equivalent Nemesis Turns about 86 loops per minute Left Cardboard rocket tube can substi tuted pacifier pod shown Leading edge cut back spar locating mount January 1977 25 Fast Blasta oz for 460 sq model hol lowed out LE thicker spar web hollowed-out ribs center rib shown has lighter trail ing edge no full-span spruce thinner spar web selecting wood care fully weighs 17 oz further half oz could saved hollowing out thing could try trimming inch off front ribs reduce area speed speed turns still retain advantages structure turns about 86 loops per min ute 10% Nitro 9 X 6 Punchello wood orbits 107 mph level using British 3-strand CL wire motor 8-yearold Supertigre G21/35 modified model has wing loading equiva lent 127 oz Nemisis complete motor ready fly can imagine tight will turn have im agine because cannot build light get some idea its turn capa bility loops about two-thirds diam eter regular 330 sq hot ship lot fun fly interesting combat rules general opinion no substitute cubic inches brute horsepower over rules no substitute square inches few optional modifications model shown plan As life expectancy model between 10 seconds 5 minutes actual combat time solo flying opponents motor will start may want build 3/t-in wide center rib no ply cap strips cut lumps out plastic tips LE spar web ribs center rib etc Still use ers run out ply bearer strengthener use favorite card board roll instead pacifier pod shown want longer tube shift first outboard rib over bit will notice difference model flying have built six models con test two have great three have OK has useless usually due small CG upsets caused wood weight varying model model Plastic doesnt vary spruce varies little balsa varies lot further CG varies greater CG upset build Blastas batches four can cut balsa stripper shown plan four trailing edges 4 X As X 36 sheet set ribs 1/g X 3 sheet ribs too far CG four tails 4 X /8 X 36 sheet Models have similar weight distribution better still motor Expanded polystyrene L E tips permit mass production cheap reusable/replaceable components Top Start L E cut Middle First cut complete Left Leading edge com pletefour models buildable week 26 Model Aviation Above Cutting large slab plastic right size longer hot wire Note guides bat tery tapped 68 1OV Right T B Ready Cut tips Tip being cut 2 pix Tip finished about 20 seconds mount put last after model has covered motor position adjusted before fixing correct CG obtained model Also live very windy area States can stick motor mount l2O side-thrust extra line tension up wind Line tension another point considered because model loops tighter average centrifugal force reduced line whip increases inboard wing 2 inches longer outboard wing help solve prob lem because makes model tend roll out pilot flight attitudes Analyzing structure purpose leading-edge two-fold 1 has separate airflow front wing 2 must prevent wings clapping hands model does ioop polystyrene part cut hot wire simple jig method allows de sign own particular LE shape different wing thicknesses spar made three parts web /s-in balsa two spruce flanges resists bending shear forces imposed LE flight bending stress spar greatest wing root Therefore spruce flanges resist bending stresses taper root Vs X Y8 tips A-in sheet balsa web sized resist shear forces maximum tips cut same balsa stripper used cut ribs Another strip per used cut trailing edges yet another employed cut center rib build strippers push knife blade through lump /2 X 2 X 2/2 balsa point blade protrudes dis tance equal thickness wood intend cut epoxy place Epoxy scrap piece /s X hard balsa spruce distance blade tip equal width strip required slight diverging angle blade cutting direction angle makes sure blade does wan der sheet being stripped cut -in-thick balsa sheet mount blade January1977 27 -in protrusion cut side -in sheet Add Sello tape similar reduce friction strippers very easy make strips cut secondsall exactly same size polystyrene foam LE cut hot wire made piece old controlline wire heated 12V car battery Both 3- 7-strand Laystraight CL wire available Britain has used successfully see no reason scrap length 018 line cannot used 12V makes wire too hot can modify battery tap off 6 8 IOV required Obviously commercial expanded polystyrene wing cutter available model shops better outfit ex pensive Blasta leading edges up now have heen cut homemade ar rangement Build LE cutting jig shown plan -in ply blockboard chiphoard make sure distance tween 1/32-in ply LE templates 19 base Z plate should 11 ate between LE tem plates 1 e Y foam sits 9 X 22 X between two plates d tip jig making sure 1/16 ply wing section template cen terline same distance above base plate 1/16-in hole through ost post can lump engine bearer Tie another piece control-line wire /8-in ply hot-wire T handle pass through post hole tie post Get some cheap electrical flex suitable bedside lamps etc join end hot wire battery About 8 volts should enough cut tips section template should 1/32 bigger around wing section required width ply LE cutting tem plate shown plan LE hot wire frame made X 1 soft pine upright arm H frame made pivot fixing cross member single screw nail bolt Knock nail top bot tom uprights Tie CL hot wire bottom two nails elastic between top pair tension wire elec tric flex about 6 ft used connect end hot wire battery screws cutter ready use Expanded polystyrene available country insulation contractors lo cated checking phone book will probably available 8 X 4 eets enough last year two Cut block 18 x 12 X 2 lay LE jig between templates practice cutting probably best cut down wards side templates gives better shape cut tips lay hot wire base plate behind template mounting post place 4 X 11 X 2 block against wing section template Run hot wire round template pulling time gently wire keep taut hesitate stop anywhere otherwise FASTaLASTA mDaYMOdW WLKENJ Shoot hobo 000 onootw 800 tp 3on4 w00d tn*obw 0m td00 ot.00 0000 nooton nonot000 otozIij noaonboIo0oo. b00 I0LEotIon t no tong 0000 on 001 thoonhnotd noo woo -Optonwt to0owod fi b000 0 900Ot ~o80oott b0onob Iwhq oopatooon hothod L 2 Towbog odgo donf boo onnoowit 000000 pI pbotofiono.0n0Ob __________Li Enpo boonon oooon00y onnotnootton0totOO oonoit000000gpgNALLE 4oott O anot w**on dy nito tonSSr35 Con 0000 no00110 ton LI] oofltg b0on otooP7 0th 0opay ononoononnt st-i Oqoonooglo ffrConto owotion ofrootiti 0 oott 0000- Zonqit Tqo*O00Wq - ton dw00L[T ibdnwbwwodo l -PoOIOon tonb IdfonlOowod tm 34 1n Eloblo twonon hd00 wobon -Ahod,obonth itobon 23 22 ISO 1oonbottony Pt ton0Iotodonononi X plot nwonobo b 000 nob 4Eho1 ton ST Ost 58 olonob 0 p1000 0ho0 000 ob Enwot pOditwo 100th 7 onEt hobo 2nqkwd00*1010I t hdt KooOo towikon oton 000 %obloopoon nontro ootnn3oaonnolo niton on0010 1ooply boiwonk ion ob*onwi -tdOTE LEoontonono ion 0000 nob 0000 nonnE 0 0oott 000000000000 000000t TopIon ply ono 00np on0 00 000000 towo 000 000* ro-notonownont 0*0 000000 WinO o00 000 tot oft ototog 0000000 *00w. 000 ooottod OpOonlolTE totnh onowoqo 0 0000 0 t b000 p000000 pOd 2oqbod Solontknon two toning ModIfy No 510 non, 00dm Sddqoo WnoOqtottO tW IolobtopS ton p00000BbotOon 28 Model Aviation Fl Eooqtoot0 /tboon SootnTE i ottod 30000 O00 10 0d.p 0 ton t odotkotfn000t 0opltn groove will melted surface tipwhich does matter much unless leading edge Once wire has pulled right round template move plastic forward about 1 lift block up away jig tip will fall out block will take long cut enough five ten models after experimenting bit different voltages wont cost much either model like others will prob ably break hits ground spruce center-section strengtheners stop abruptly along leading trailing edges attempt encourage wing snap points repairs easy instead next center rib may like encourage break notching TE points must point out however idea no proof will work should able make both jigs convert battery experiment bplyooototboodK plyooolokbodteoley e 000 oertdOhOt0t Ik-Soolto 7 I. gdeoe P0 Optod holbeed OOt p 5 OOly pO0teo pod olg Oqed khdlo hole doot hole 10 lb poeltoe edOptloeol Ighteleeg 1000 kotid 100g ot tot tho loWO Ore rO ototeeootoO5oOV eyoo Ipem eeerdttd eye Ioeg tot tt eev different voltages cut enough leading edge section tips four models couple evenings Once rib template balsa strippers engine bearer drill ing jig have made ready mass production Construction Make sign saying model am taking hours construct may last 10 seconds combat Now make another saying model 60 ft away flying 100 mph engaged combat will notice effect extra work Pin up above workbench remind spend time fiddling about silly details will assume going make four models combat next weekend Monday evening have already built jigs templates have pile tips LE sections Grab very light X 4 X 36 balsa sheet mark rib positions right across over plan using square trailing edge stripper strip four strips razor-plane chamfer rear /4 trailing edge sharp point leaving center section square meets tail plane Cut four 9 X / X ce strips 36-in length white glue Sellotape fix trailing edge position shown plan Sellotape holds spruce position glue drying bother remove tape read sign 2 Mark rib positions two 3 X 1/i X 36 sheets balsa strip 1/2-in strips rib stripper four strips become spar webs Strip four 3 X /i X 36 sheets down middle same stripper 9-inlong rib template laid top strips cut rib tapers TE notch Use template mark front rib Remove template place small metal square strip cut rib free simple perfectly accurate cross cut Only 31 go Take two /s X /s spruce strips hack taper end both measure /i square tips glue webs white glue epoxy clamping about 20 spring clothes pins like can set about 1/64 edges web save having get perfect edge alignment Fit two /i X /8 centersection reinforcing spruce strips other side web set aside dry Modify No 5 rib front fit web same other three spars Cut balsa center rib center rib stripper Cut tapers crank mount holes TE tail notches center rib 12 long continued page 9] January 1977 29 31h I. 2 jeokee oP otttoeoketloedeg ge - PIOokOtOooOo Ootteg pg e0g hod reh Wilkens left Frank Smart holding two FAI planes just show big much Fast Blasta like Airfoil plans left self jigging flies very well Lhooflleg -be 2eqked Shereshaws beautiful big cabin machine Gene has 24 ready go Shortly will shipping parts kits Dallaire Sportster won RC Antique 76 SAM Champs Trenton Ter ror Miss America beautiful sevenfoot Buccaneer Super Buccaneer oldies goodies biggies Postscripts will end up months column bi-monthly plea puts readers Next column will report results Scotty Mur ray Memorial Annual Pensacola Although home still Pensa cola am working Washington DC Please address correspondence Jack Bolton 8W7 Ferncl CL Spring field VA 22153 phone 703 455-3089 please include SASE Fast Blasta/Wilkens continued page 29 yougetsixoutofa3 X sheet Cut 1/32 ply cap strips top incorporates pushrod slot White glue Sellotape again Tuesday Cut A-in ply crank mounts drill crank bolt holes suit 3-in belicrank mounting bolts British Micromold 3 nylon crank shown plan crank can used use pushrod hole nearest bolt Insert crank bolts add cranks leadouts pushrods Make Z-bend 1/16 music wire prevent falling out crank Cut out four delta tails 4 X 36 X /s soft balsa sheet extend front tail adding 1 X /i balsa strip tail use 5-in sheet can buy Cut Y8-in soft balsa elevators round off edges sandpaper No fancy airfoilsread signs tailplane flat edge table elevator right angles down over table edge stick top I-in wide Sellotape hinge pressing tape crack Turn lot over repeat operation Bend elevator up down dozen times check hinge OK cover side tail elevator single piece Fascal Solarfilm again elevator right angles tail Turn over re peat Number ribs cut leadout holes Use white glue Hot Stuff assembly components except LEs tips may fixed Hot Stuff First stick ribs including center ribs onto trailing edges using plan guide Remove pegs spars lay spars front end down build ing board up end rib/TE assem blies dropping vertically posi tion spars crosspinning ribs white glue sets Make sure tip ribs square spar viewed rear otherwise may get unwanted tip dihedral Remove some covering tailplanes touch center ribs cut out 1/16-in balsa tail packing pieces glue tailplanes glue tailplanes center ribs TEs should have spent eight hours total time reaching stage White glue Sellotape pin LE section place trim ends flush tip ribs using knife razorplane new blade Make leadout holes through inboard tips rat-tail file use hot pushrod melt /8-in dia hole takes practice try first scrap chunk foam go I-in long /8-in dia aluminum brass copper leadout tubes Epoxy place smear epoxy round holes round edge tip reinforce plastic shown plan Fix tips place epoxy white glue Wednesday go control assem blies X 1/32 ply bellcrank stops center-section sheeting Make up pacifier pods fix place add covering support strips /s balsa After removing some covering elevator epoxy 1/32-ply horn mount ing plates place Add balsa tip gusJanuary 1977 91 SoIuFiIm TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA CN AA HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS Aena HOT FUEL PROOF DOPE AWARD WINNING HI-GLOSS AND FLAT FINISHES AVAILABLE IN OVER 36 COLORS IN BRUSH AND SPRAY ptIia Industries InC 7060 HOLLYWOOD BLvD. LOS ANGELES CA 90028 sets sandpaper frame smooth spend ing about five minutes model much sandpaper Add Fascal Solarfilm tail fairings top bottom Thursday Test iron temperature scrap chunk plastic melt LE tips cover models using separate pieces tips Note cannot cover model silk paper nylon because dope melts polystyrene suppose could cover tips LE first paper glued diluted white glue worth time Remember heat melts polysty rene Go steady heat gun iron shrinking covering Dewarping wing over gas stove front electric fire bit risky unless mask LE tips heat sheet balsa chunk cardboard Friday Cut 1 1/32-in wide section leading edge away back spar al low motor mount butt up against remove some covering under bearers will fit wing 1/32-in ply plate eases construc tion increases strength mo tor mounts Mark bearer spacer positions ply build engine bearer assemblies Trim ply away tween bearers fit over wing spar Sellotape nacelles assemblies along motor prop motor-mount bolts nuts plates Slide assembly onto model test CO pins set back leading edge shown plan Adjust motor position obtain CO trimming bearer spacers leading edge re B Pwher7 4 7 6 78 50% SrZeseach84 86 88 65% 5/3 5y0494 96 97 98 63 64 30%i04 10685% 8685%114 116 11-8 961065i 3 BlaJe Trtor 5354 63 6-4 50% 3 BIde Posher 6350% RC 124 125 176150 ORISH BROS ST jOHN INDIANA 46373 quired Remove assembly Drill bolt holes Using drilling jig guide fit some 4-40 blind-mounting nuts epoxy nacelle bearer assemblies complete mounts wings Side-thrust easily obtained want sticking mounts 10 20 offset necessary un less fly very windy conditions Drill 3/16-in hole right through bearers center rib crank mount shown plan insert 3/16-in dia dowel prevents crank mount leaving model during pull test Repeat procedure three other models /8 dural engine mounting plates shown plan cut down vibration make unnecessary cut ply under crankcase glued bearers motor Two coats dope fuel proof er applied mounts after epoxy fillet has smeared round motormount/leading-edge joint prevent gress polystyrene solvents dope glass fiber resin Glass fiber need applied ply stops bearers cracking up Fuel-proof 1/32 ply horn mounting plates elevator fuel-proof Inside fuel pod Saturday morning Youve done very well considering arent familiar model have now fit nylon control horn Kavan medium shown connect Kwik-Link pushrod horn Dewarp model before flying using steam kettle heat gun Flying Fly model level check isnt banking out Fly inverted check same line tension differ ent now outboard tip visible missed removing warp Remove fore flying tight turns model may crash warps have removed fly wide consecutive loops tighten up much possible Note whether outboard wing suddenly drops flies wider 1oops inboard wing simultaneous 15-20% reduction airspeed happens wing has stalled because too much elevator movement Try same procedure outsides before landing drops wing 1oop direction reduce ele vator throw stalling direction refly still stalls move link higher hole horn will need elevator movement windy days satisfied turn per formance add weight tail until Wrap solder round horn make sure model doesnt become di rectionally unstable after doing must still able flicked rocksteady level flight may advantageous building batch models test fly find CO position suits best before glucing motor mounts other models chaps know much about Honking 35s must ex periment find best prop fuel suit needs model intended fly super fast intended turn prop fit must lesser pitch normally use motor right gear sharp corners used 9/6 Rev Up wood Nats 20% fuel got about 95 100 mph level turned about same speed honking streamlined ships Practice Flying universal defense maneuver wiggle whereby model flown zig zag flight path towards ground wingover model directly overhead fly Fig 1 dozen times check gap FIG 1 12 FT GAP CRflI INn should big enough fit least half-loop aim re duce 1-2 ft starting pattern 4 FIG 2 4 92 Model Aviation MORE wMTCC taster ofl same power YELLOW PROPELI G08eesed e~o ~O9 o ADE Metallic Alumiuum S 8W 8-6 88 125 96 106 104 150 106Poshee CtVV150 Fast Blasta continued N WSPAPER mm IIVDP hobby centerinc bit lower time inverted wingovers wiggle up down 455 axis finally dog-leg axis Fig 2 five points maneuver model changes its ioop direction points loop may continued round position behind opposition five opportunities occur ring two seconds throughout match will long before following opponent Remember speed side flying level model much slower its smaller streamlined cousin enough prevent making get-away level flight So instead trying imitate jet anyone can predict therefore intercept must fly model wasp buzzing round jar honey make almost impossible opponent zero accurate ly fly level 1/10 second otherwise some whizz kid will convince himself sitting duck turnspeed probably equal pos sibly better opponent turn radius smaller model capable staying behind others day up put worst thing can lose sight target close following reduces chance happening enormously Watch opponents model copy everything does does matter very close behind him first can cut corners close gap after first couple turns try cuts back streamer Remem ber cannot line up until quit following quit have worry much about line tangles opponent expert flier will prob ably lead Close following again helps sort out line tangle does occur because easier remember flew mutual cooperation can fly out way flew theory anyway forget kill ahead points model sprayed-on color doped finish prefer have brownline run off original vellum manner keep original copies course same Thus draw ing insignia little off scale some dimensions will least uniform brownline first backed adhesive transfer tape colored felt-tip pen Except white use latex white-out After colors successfully done cut out patch peel off tape backing have applique model has colored Japanese tissue finish applique can made using Japanese tissue keep feel model constant would keeping see-through look lightly constructed model Searching good documentation particular aircraft may well lead finding building another interesting model have built decorated model liked built again improve ments flying dr changes struc ture decorated another color scheme second time have same basic airplane completely different model WHEN FIRST started column stated rules would discussed Well shanie having known 4 OlWELL T4ATh ONL MNE INCI4ES ON ThE TALE MAP rule book error rubber scale scoring Rule 507 remember pro posal total score being lower two scale judging flight points seeing book assumed pro posal passed intent proposing using lower score eliminate ghost ships scale competition However just doesnt work way flying conditions bad flight scores will low model wont fly well because spectator damage com plexity choice subject builder re ceives no reward scale con struction effort believe because scale events events reward builder workmanship scale fidelity flying ability three areas should equally considered determining winners fore have submitted rules change pro posal limiting maximum flight points same fifty 50 given workmanship scale fidelity should make opinions proposal known district scale contest board member Ralph D Kuenz 14645 Stahelin De troit Mich 48223 January 1977 93 Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground Price $3495 kit per doUar bar em GREATEST R/C SSBASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andrews Aircraft Modri co Inc 155 Rte 1& North St Topafield Mass 01983 8878541 Support AMA FF Scale/Kuenz continued page 40 Delicate looking Castalbert IV Peanut Old Timer built Stan Fink Walt Mooney plans Photo Carol Cogswell
Edition: Model Aviation - 1977/01
Page Numbers: 25, 26, 27, 28, 29, 91, 92, 93
FAST DL Richard Wilkens THE IDEA THAT should enter 1975 US Nats came Charlie Johnson Gary Frost met British Nats May 1975 already booked peaceful hitchhike tour little old country yours Charlie suggested should visit him Cali fornia before Nats boxed five FAI Blastas left over British Interna tional headed West Charlie Lorna gave plenty advice Fast Com bat hadnt would have doubtful could have entered Nats scaled up 400 sq FAT Blasta California result now consider ably improved appears article original after having miraculously sur vived two mid-air collisions scoring lucky kill second round smashed during fly-off match 5th place against Greg Hissem flying bit too well Editors Note Keep mind flying Fast rules new experience Wilkens comparable US modeler flying FAT rules interna tional competition Compared Fast ships chaps used seeing huge flat-section wing makes flight mula manuals curl up edges dis covered 1965 Britain since 99% British models have used type section advantages models go together extremely quickly cause selfjigging can built flat building board easy repair motor mounts tips tails can reused model gets smashed structure makes easy model formed two broken ones has fewer components its US cousin very few precision fits required during assembly Blasta expanded polystyrene lead ing edge tips 1975 invention worlds respected FAI combat fliers adapts famous Blasta American Fast Combat rules allows mass produce very cheaply identical reusable/replaceable components crushed LE example can cut off replaced field tween matches one-piece tips copy wing section taper produce liftproducing section beyond 36-in balsa frame Tips like may made wing section fitted model thus increasing its aspect ratio reducing induced drag wing may also hollowed out hot knife make super light Britain contest held week between March October country about size Illinois no has far travel Everyone enters contests possible limiting factor ing quickly can replenish stock models US structures thus totally impractical over take too long build Vampires Shrika IIs excepted Because fliers meet nearly week some often take two three differ ent size models along contest may select fly against par ticular opponent hoping out turn model small amount about same speedperhaps bit slower correct selection model rather like expert fisherman selecting right bait certain fish certain river no such thing universal worm beats fish universal combat model beats others another great advantage flat-section wing comes because constructional system allows variation overnight chord therefore area favorite design plastic tip jig can used out modification moving block plastic reduce length tip dur ing cutting As soon someone makes curved wing section problem lot difficult solve screws up airfoil percentages Having never flown Fast Combat fore sizing Fast version shot dark CG bit too far back -oz prop nut fitted Nats model bringing its weight up 19 Top Try Wilkie saying Weighing less 18 oz has wing/loading equivalent Nemesis Turns about 86 loops per minute Left Cardboard rocket tube can substi tuted pacifier pod shown Leading edge cut back spar locating mount January 1977 25 Fast Blasta oz for 460 sq model hol lowed out LE thicker spar web hollowed-out ribs center rib shown has lighter trail ing edge no full-span spruce thinner spar web selecting wood care fully weighs 17 oz further half oz could saved hollowing out thing could try trimming inch off front ribs reduce area speed speed turns still retain advantages structure turns about 86 loops per min ute 10% Nitro 9 X 6 Punchello wood orbits 107 mph level using British 3-strand CL wire motor 8-yearold Supertigre G21/35 modified model has wing loading equiva lent 127 oz Nemisis complete motor ready fly can imagine tight will turn have im agine because cannot build light get some idea its turn capa bility loops about two-thirds diam eter regular 330 sq hot ship lot fun fly interesting combat rules general opinion no substitute cubic inches brute horsepower over rules no substitute square inches few optional modifications model shown plan As life expectancy model between 10 seconds 5 minutes actual combat time solo flying opponents motor will start may want build 3/t-in wide center rib no ply cap strips cut lumps out plastic tips LE spar web ribs center rib etc Still use ers run out ply bearer strengthener use favorite card board roll instead pacifier pod shown want longer tube shift first outboard rib over bit will notice difference model flying have built six models con test two have great three have OK has useless usually due small CG upsets caused wood weight varying model model Plastic doesnt vary spruce varies little balsa varies lot further CG varies greater CG upset build Blastas batches four can cut balsa stripper shown plan four trailing edges 4 X As X 36 sheet set ribs 1/g X 3 sheet ribs too far CG four tails 4 X /8 X 36 sheet Models have similar weight distribution better still motor Expanded polystyrene L E tips permit mass production cheap reusable/replaceable components Top Start L E cut Middle First cut complete Left Leading edge com pletefour models buildable week 26 Model Aviation Above Cutting large slab plastic right size longer hot wire Note guides bat tery tapped 68 1OV Right T B Ready Cut tips Tip being cut 2 pix Tip finished about 20 seconds mount put last after model has covered motor position adjusted before fixing correct CG obtained model Also live very windy area States can stick motor mount l2O side-thrust extra line tension up wind Line tension another point considered because model loops tighter average centrifugal force reduced line whip increases inboard wing 2 inches longer outboard wing help solve prob lem because makes model tend roll out pilot flight attitudes Analyzing structure purpose leading-edge two-fold 1 has separate airflow front wing 2 must prevent wings clapping hands model does ioop polystyrene part cut hot wire simple jig method allows de sign own particular LE shape different wing thicknesses spar made three parts web /s-in balsa two spruce flanges resists bending shear forces imposed LE flight bending stress spar greatest wing root Therefore spruce flanges resist bending stresses taper root Vs X Y8 tips A-in sheet balsa web sized resist shear forces maximum tips cut same balsa stripper used cut ribs Another strip per used cut trailing edges yet another employed cut center rib build strippers push knife blade through lump /2 X 2 X 2/2 balsa point blade protrudes dis tance equal thickness wood intend cut epoxy place Epoxy scrap piece /s X hard balsa spruce distance blade tip equal width strip required slight diverging angle blade cutting direction angle makes sure blade does wan der sheet being stripped cut -in-thick balsa sheet mount blade January1977 27 -in protrusion cut side -in sheet Add Sello tape similar reduce friction strippers very easy make strips cut secondsall exactly same size polystyrene foam LE cut hot wire made piece old controlline wire heated 12V car battery Both 3- 7-strand Laystraight CL wire available Britain has used successfully see no reason scrap length 018 line cannot used 12V makes wire too hot can modify battery tap off 6 8 IOV required Obviously commercial expanded polystyrene wing cutter available model shops better outfit ex pensive Blasta leading edges up now have heen cut homemade ar rangement Build LE cutting jig shown plan -in ply blockboard chiphoard make sure distance tween 1/32-in ply LE templates 19 base Z plate should 11 ate between LE tem plates 1 e Y foam sits 9 X 22 X between two plates d tip jig making sure 1/16 ply wing section template cen terline same distance above base plate 1/16-in hole through ost post can lump engine bearer Tie another piece control-line wire /8-in ply hot-wire T handle pass through post hole tie post Get some cheap electrical flex suitable bedside lamps etc join end hot wire battery About 8 volts should enough cut tips section template should 1/32 bigger around wing section required width ply LE cutting tem plate shown plan LE hot wire frame made X 1 soft pine upright arm H frame made pivot fixing cross member single screw nail bolt Knock nail top bot tom uprights Tie CL hot wire bottom two nails elastic between top pair tension wire elec tric flex about 6 ft used connect end hot wire battery screws cutter ready use Expanded polystyrene available country insulation contractors lo cated checking phone book will probably available 8 X 4 eets enough last year two Cut block 18 x 12 X 2 lay LE jig between templates practice cutting probably best cut down wards side templates gives better shape cut tips lay hot wire base plate behind template mounting post place 4 X 11 X 2 block against wing section template Run hot wire round template pulling time gently wire keep taut hesitate stop anywhere otherwise FASTaLASTA mDaYMOdW WLKENJ Shoot hobo 000 onootw 800 tp 3on4 w00d tn*obw 0m td00 ot.00 0000 nooton nonot000 otozIij noaonboIo0oo. b00 I0LEotIon t no tong 0000 on 001 thoonhnotd noo woo -Optonwt to0owod fi b000 0 900Ot ~o80oott b0onob Iwhq oopatooon hothod L 2 Towbog odgo donf boo onnoowit 000000 pI pbotofiono.0n0Ob __________Li Enpo boonon oooon00y onnotnootton0totOO oonoit000000gpgNALLE 4oott O anot w**on dy nito tonSSr35 Con 0000 no00110 ton LI] oofltg b0on otooP7 0th 0opay ononoononnt st-i Oqoonooglo ffrConto owotion ofrootiti 0 oott 0000- Zonqit Tqo*O00Wq - ton dw00L[T ibdnwbwwodo l -PoOIOon tonb IdfonlOowod tm 34 1n Eloblo twonon hd00 wobon -Ahod,obonth itobon 23 22 ISO 1oonbottony Pt ton0Iotodonononi X plot nwonobo b 000 nob 4Eho1 ton ST Ost 58 olonob 0 p1000 0ho0 000 ob Enwot pOditwo 100th 7 onEt hobo 2nqkwd00*1010I t hdt KooOo towikon oton 000 %obloopoon nontro ootnn3oaonnolo niton on0010 1ooply boiwonk ion ob*onwi -tdOTE LEoontonono ion 0000 nob 0000 nonnE 0 0oott 000000000000 000000t TopIon ply ono 00np on0 00 000000 towo 000 000* ro-notonownont 0*0 000000 WinO o00 000 tot oft ototog 0000000 *00w. 000 ooottod OpOonlolTE totnh onowoqo 0 0000 0 t b000 p000000 pOd 2oqbod Solontknon two toning ModIfy No 510 non, 00dm Sddqoo WnoOqtottO tW IolobtopS ton p00000BbotOon 28 Model Aviation Fl Eooqtoot0 /tboon SootnTE i ottod 30000 O00 10 0d.p 0 ton t odotkotfn000t 0opltn groove will melted surface tipwhich does matter much unless leading edge Once wire has pulled right round template move plastic forward about 1 lift block up away jig tip will fall out block will take long cut enough five ten models after experimenting bit different voltages wont cost much either model like others will prob ably break hits ground spruce center-section strengtheners stop abruptly along leading trailing edges attempt encourage wing snap points repairs easy instead next center rib may like encourage break notching TE points must point out however idea no proof will work should able make both jigs convert battery experiment bplyooototboodK plyooolokbodteoley e 000 oertdOhOt0t Ik-Soolto 7 I. gdeoe P0 Optod holbeed OOt p 5 OOly pO0teo pod olg Oqed khdlo hole doot hole 10 lb poeltoe edOptloeol Ighteleeg 1000 kotid 100g ot tot tho loWO Ore rO ototeeootoO5oOV eyoo Ipem eeerdttd eye Ioeg tot tt eev different voltages cut enough leading edge section tips four models couple evenings Once rib template balsa strippers engine bearer drill ing jig have made ready mass production Construction Make sign saying model am taking hours construct may last 10 seconds combat Now make another saying model 60 ft away flying 100 mph engaged combat will notice effect extra work Pin up above workbench remind spend time fiddling about silly details will assume going make four models combat next weekend Monday evening have already built jigs templates have pile tips LE sections Grab very light X 4 X 36 balsa sheet mark rib positions right across over plan using square trailing edge stripper strip four strips razor-plane chamfer rear /4 trailing edge sharp point leaving center section square meets tail plane Cut four 9 X / X ce strips 36-in length white glue Sellotape fix trailing edge position shown plan Sellotape holds spruce position glue drying bother remove tape read sign 2 Mark rib positions two 3 X 1/i X 36 sheets balsa strip 1/2-in strips rib stripper four strips become spar webs Strip four 3 X /i X 36 sheets down middle same stripper 9-inlong rib template laid top strips cut rib tapers TE notch Use template mark front rib Remove template place small metal square strip cut rib free simple perfectly accurate cross cut Only 31 go Take two /s X /s spruce strips hack taper end both measure /i square tips glue webs white glue epoxy clamping about 20 spring clothes pins like can set about 1/64 edges web save having get perfect edge alignment Fit two /i X /8 centersection reinforcing spruce strips other side web set aside dry Modify No 5 rib front fit web same other three spars Cut balsa center rib center rib stripper Cut tapers crank mount holes TE tail notches center rib 12 long continued page 9] January 1977 29 31h I. 2 jeokee oP otttoeoketloedeg ge - PIOokOtOooOo Ootteg pg e0g hod reh Wilkens left Frank Smart holding two FAI planes just show big much Fast Blasta like Airfoil plans left self jigging flies very well Lhooflleg -be 2eqked Shereshaws beautiful big cabin machine Gene has 24 ready go Shortly will shipping parts kits Dallaire Sportster won RC Antique 76 SAM Champs Trenton Ter ror Miss America beautiful sevenfoot Buccaneer Super Buccaneer oldies goodies biggies Postscripts will end up months column bi-monthly plea puts readers Next column will report results Scotty Mur ray Memorial Annual Pensacola Although home still Pensa cola am working Washington DC Please address correspondence Jack Bolton 8W7 Ferncl CL Spring field VA 22153 phone 703 455-3089 please include SASE Fast Blasta/Wilkens continued page 29 yougetsixoutofa3 X sheet Cut 1/32 ply cap strips top incorporates pushrod slot White glue Sellotape again Tuesday Cut A-in ply crank mounts drill crank bolt holes suit 3-in belicrank mounting bolts British Micromold 3 nylon crank shown plan crank can used use pushrod hole nearest bolt Insert crank bolts add cranks leadouts pushrods Make Z-bend 1/16 music wire prevent falling out crank Cut out four delta tails 4 X 36 X /s soft balsa sheet extend front tail adding 1 X /i balsa strip tail use 5-in sheet can buy Cut Y8-in soft balsa elevators round off edges sandpaper No fancy airfoilsread signs tailplane flat edge table elevator right angles down over table edge stick top I-in wide Sellotape hinge pressing tape crack Turn lot over repeat operation Bend elevator up down dozen times check hinge OK cover side tail elevator single piece Fascal Solarfilm again elevator right angles tail Turn over re peat Number ribs cut leadout holes Use white glue Hot Stuff assembly components except LEs tips may fixed Hot Stuff First stick ribs including center ribs onto trailing edges using plan guide Remove pegs spars lay spars front end down build ing board up end rib/TE assem blies dropping vertically posi tion spars crosspinning ribs white glue sets Make sure tip ribs square spar viewed rear otherwise may get unwanted tip dihedral Remove some covering tailplanes touch center ribs cut out 1/16-in balsa tail packing pieces glue tailplanes glue tailplanes center ribs TEs should have spent eight hours total time reaching stage White glue Sellotape pin LE section place trim ends flush tip ribs using knife razorplane new blade Make leadout holes through inboard tips rat-tail file use hot pushrod melt /8-in dia hole takes practice try first scrap chunk foam go I-in long /8-in dia aluminum brass copper leadout tubes Epoxy place smear epoxy round holes round edge tip reinforce plastic shown plan Fix tips place epoxy white glue Wednesday go control assem blies X 1/32 ply bellcrank stops center-section sheeting Make up pacifier pods fix place add covering support strips /s balsa After removing some covering elevator epoxy 1/32-ply horn mount ing plates place Add balsa tip gusJanuary 1977 91 SoIuFiIm TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA CN AA HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS Aena HOT FUEL PROOF DOPE AWARD WINNING HI-GLOSS AND FLAT FINISHES AVAILABLE IN OVER 36 COLORS IN BRUSH AND SPRAY ptIia Industries InC 7060 HOLLYWOOD BLvD. LOS ANGELES CA 90028 sets sandpaper frame smooth spend ing about five minutes model much sandpaper Add Fascal Solarfilm tail fairings top bottom Thursday Test iron temperature scrap chunk plastic melt LE tips cover models using separate pieces tips Note cannot cover model silk paper nylon because dope melts polystyrene suppose could cover tips LE first paper glued diluted white glue worth time Remember heat melts polysty rene Go steady heat gun iron shrinking covering Dewarping wing over gas stove front electric fire bit risky unless mask LE tips heat sheet balsa chunk cardboard Friday Cut 1 1/32-in wide section leading edge away back spar al low motor mount butt up against remove some covering under bearers will fit wing 1/32-in ply plate eases construc tion increases strength mo tor mounts Mark bearer spacer positions ply build engine bearer assemblies Trim ply away tween bearers fit over wing spar Sellotape nacelles assemblies along motor prop motor-mount bolts nuts plates Slide assembly onto model test CO pins set back leading edge shown plan Adjust motor position obtain CO trimming bearer spacers leading edge re B Pwher7 4 7 6 78 50% SrZeseach84 86 88 65% 5/3 5y0494 96 97 98 63 64 30%i04 10685% 8685%114 116 11-8 961065i 3 BlaJe Trtor 5354 63 6-4 50% 3 BIde Posher 6350% RC 124 125 176150 ORISH BROS ST jOHN INDIANA 46373 quired Remove assembly Drill bolt holes Using drilling jig guide fit some 4-40 blind-mounting nuts epoxy nacelle bearer assemblies complete mounts wings Side-thrust easily obtained want sticking mounts 10 20 offset necessary un less fly very windy conditions Drill 3/16-in hole right through bearers center rib crank mount shown plan insert 3/16-in dia dowel prevents crank mount leaving model during pull test Repeat procedure three other models /8 dural engine mounting plates shown plan cut down vibration make unnecessary cut ply under crankcase glued bearers motor Two coats dope fuel proof er applied mounts after epoxy fillet has smeared round motormount/leading-edge joint prevent gress polystyrene solvents dope glass fiber resin Glass fiber need applied ply stops bearers cracking up Fuel-proof 1/32 ply horn mounting plates elevator fuel-proof Inside fuel pod Saturday morning Youve done very well considering arent familiar model have now fit nylon control horn Kavan medium shown connect Kwik-Link pushrod horn Dewarp model before flying using steam kettle heat gun Flying Fly model level check isnt banking out Fly inverted check same line tension differ ent now outboard tip visible missed removing warp Remove fore flying tight turns model may crash warps have removed fly wide consecutive loops tighten up much possible Note whether outboard wing suddenly drops flies wider 1oops inboard wing simultaneous 15-20% reduction airspeed happens wing has stalled because too much elevator movement Try same procedure outsides before landing drops wing 1oop direction reduce ele vator throw stalling direction refly still stalls move link higher hole horn will need elevator movement windy days satisfied turn per formance add weight tail until Wrap solder round horn make sure model doesnt become di rectionally unstable after doing must still able flicked rocksteady level flight may advantageous building batch models test fly find CO position suits best before glucing motor mounts other models chaps know much about Honking 35s must ex periment find best prop fuel suit needs model intended fly super fast intended turn prop fit must lesser pitch normally use motor right gear sharp corners used 9/6 Rev Up wood Nats 20% fuel got about 95 100 mph level turned about same speed honking streamlined ships Practice Flying universal defense maneuver wiggle whereby model flown zig zag flight path towards ground wingover model directly overhead fly Fig 1 dozen times check gap FIG 1 12 FT GAP CRflI INn should big enough fit least half-loop aim re duce 1-2 ft starting pattern 4 FIG 2 4 92 Model Aviation MORE wMTCC taster ofl same power YELLOW PROPELI G08eesed e~o ~O9 o ADE Metallic Alumiuum S 8W 8-6 88 125 96 106 104 150 106Poshee CtVV150 Fast Blasta continued N WSPAPER mm IIVDP hobby centerinc bit lower time inverted wingovers wiggle up down 455 axis finally dog-leg axis Fig 2 five points maneuver model changes its ioop direction points loop may continued round position behind opposition five opportunities occur ring two seconds throughout match will long before following opponent Remember speed side flying level model much slower its smaller streamlined cousin enough prevent making get-away level flight So instead trying imitate jet anyone can predict therefore intercept must fly model wasp buzzing round jar honey make almost impossible opponent zero accurate ly fly level 1/10 second otherwise some whizz kid will convince himself sitting duck turnspeed probably equal pos sibly better opponent turn radius smaller model capable staying behind others day up put worst thing can lose sight target close following reduces chance happening enormously Watch opponents model copy everything does does matter very close behind him first can cut corners close gap after first couple turns try cuts back streamer Remem ber cannot line up until quit following quit have worry much about line tangles opponent expert flier will prob ably lead Close following again helps sort out line tangle does occur because easier remember flew mutual cooperation can fly out way flew theory anyway forget kill ahead points model sprayed-on color doped finish prefer have brownline run off original vellum manner keep original copies course same Thus draw ing insignia little off scale some dimensions will least uniform brownline first backed adhesive transfer tape colored felt-tip pen Except white use latex white-out After colors successfully done cut out patch peel off tape backing have applique model has colored Japanese tissue finish applique can made using Japanese tissue keep feel model constant would keeping see-through look lightly constructed model Searching good documentation particular aircraft may well lead finding building another interesting model have built decorated model liked built again improve ments flying dr changes struc ture decorated another color scheme second time have same basic airplane completely different model WHEN FIRST started column stated rules would discussed Well shanie having known 4 OlWELL T4ATh ONL MNE INCI4ES ON ThE TALE MAP rule book error rubber scale scoring Rule 507 remember pro posal total score being lower two scale judging flight points seeing book assumed pro posal passed intent proposing using lower score eliminate ghost ships scale competition However just doesnt work way flying conditions bad flight scores will low model wont fly well because spectator damage com plexity choice subject builder re ceives no reward scale con struction effort believe because scale events events reward builder workmanship scale fidelity flying ability three areas should equally considered determining winners fore have submitted rules change pro posal limiting maximum flight points same fifty 50 given workmanship scale fidelity should make opinions proposal known district scale contest board member Ralph D Kuenz 14645 Stahelin De troit Mich 48223 January 1977 93 Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground Price $3495 kit per doUar bar em GREATEST R/C SSBASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andrews Aircraft Modri co Inc 155 Rte 1& North St Topafield Mass 01983 8878541 Support AMA FF Scale/Kuenz continued page 40 Delicate looking Castalbert IV Peanut Old Timer built Stan Fink Walt Mooney plans Photo Carol Cogswell
Edition: Model Aviation - 1977/01
Page Numbers: 25, 26, 27, 28, 29, 91, 92, 93
FAST DL Richard Wilkens THE IDEA THAT should enter 1975 US Nats came Charlie Johnson Gary Frost met British Nats May 1975 already booked peaceful hitchhike tour little old country yours Charlie suggested should visit him Cali fornia before Nats boxed five FAI Blastas left over British Interna tional headed West Charlie Lorna gave plenty advice Fast Com bat hadnt would have doubtful could have entered Nats scaled up 400 sq FAT Blasta California result now consider ably improved appears article original after having miraculously sur vived two mid-air collisions scoring lucky kill second round smashed during fly-off match 5th place against Greg Hissem flying bit too well Editors Note Keep mind flying Fast rules new experience Wilkens comparable US modeler flying FAT rules interna tional competition Compared Fast ships chaps used seeing huge flat-section wing makes flight mula manuals curl up edges dis covered 1965 Britain since 99% British models have used type section advantages models go together extremely quickly cause selfjigging can built flat building board easy repair motor mounts tips tails can reused model gets smashed structure makes easy model formed two broken ones has fewer components its US cousin very few precision fits required during assembly Blasta expanded polystyrene lead ing edge tips 1975 invention worlds respected FAI combat fliers adapts famous Blasta American Fast Combat rules allows mass produce very cheaply identical reusable/replaceable components crushed LE example can cut off replaced field tween matches one-piece tips copy wing section taper produce liftproducing section beyond 36-in balsa frame Tips like may made wing section fitted model thus increasing its aspect ratio reducing induced drag wing may also hollowed out hot knife make super light Britain contest held week between March October country about size Illinois no has far travel Everyone enters contests possible limiting factor ing quickly can replenish stock models US structures thus totally impractical over take too long build Vampires Shrika IIs excepted Because fliers meet nearly week some often take two three differ ent size models along contest may select fly against par ticular opponent hoping out turn model small amount about same speedperhaps bit slower correct selection model rather like expert fisherman selecting right bait certain fish certain river no such thing universal worm beats fish universal combat model beats others another great advantage flat-section wing comes because constructional system allows variation overnight chord therefore area favorite design plastic tip jig can used out modification moving block plastic reduce length tip dur ing cutting As soon someone makes curved wing section problem lot difficult solve screws up airfoil percentages Having never flown Fast Combat fore sizing Fast version shot dark CG bit too far back -oz prop nut fitted Nats model bringing its weight up 19 Top Try Wilkie saying Weighing less 18 oz has wing/loading equivalent Nemesis Turns about 86 loops per minute Left Cardboard rocket tube can substi tuted pacifier pod shown Leading edge cut back spar locating mount January 1977 25 Fast Blasta oz for 460 sq model hol lowed out LE thicker spar web hollowed-out ribs center rib shown has lighter trail ing edge no full-span spruce thinner spar web selecting wood care fully weighs 17 oz further half oz could saved hollowing out thing could try trimming inch off front ribs reduce area speed speed turns still retain advantages structure turns about 86 loops per min ute 10% Nitro 9 X 6 Punchello wood orbits 107 mph level using British 3-strand CL wire motor 8-yearold Supertigre G21/35 modified model has wing loading equiva lent 127 oz Nemisis complete motor ready fly can imagine tight will turn have im agine because cannot build light get some idea its turn capa bility loops about two-thirds diam eter regular 330 sq hot ship lot fun fly interesting combat rules general opinion no substitute cubic inches brute horsepower over rules no substitute square inches few optional modifications model shown plan As life expectancy model between 10 seconds 5 minutes actual combat time solo flying opponents motor will start may want build 3/t-in wide center rib no ply cap strips cut lumps out plastic tips LE spar web ribs center rib etc Still use ers run out ply bearer strengthener use favorite card board roll instead pacifier pod shown want longer tube shift first outboard rib over bit will notice difference model flying have built six models con test two have great three have OK has useless usually due small CG upsets caused wood weight varying model model Plastic doesnt vary spruce varies little balsa varies lot further CG varies greater CG upset build Blastas batches four can cut balsa stripper shown plan four trailing edges 4 X As X 36 sheet set ribs 1/g X 3 sheet ribs too far CG four tails 4 X /8 X 36 sheet Models have similar weight distribution better still motor Expanded polystyrene L E tips permit mass production cheap reusable/replaceable components Top Start L E cut Middle First cut complete Left Leading edge com pletefour models buildable week 26 Model Aviation Above Cutting large slab plastic right size longer hot wire Note guides bat tery tapped 68 1OV Right T B Ready Cut tips Tip being cut 2 pix Tip finished about 20 seconds mount put last after model has covered motor position adjusted before fixing correct CG obtained model Also live very windy area States can stick motor mount l2O side-thrust extra line tension up wind Line tension another point considered because model loops tighter average centrifugal force reduced line whip increases inboard wing 2 inches longer outboard wing help solve prob lem because makes model tend roll out pilot flight attitudes Analyzing structure purpose leading-edge two-fold 1 has separate airflow front wing 2 must prevent wings clapping hands model does ioop polystyrene part cut hot wire simple jig method allows de sign own particular LE shape different wing thicknesses spar made three parts web /s-in balsa two spruce flanges resists bending shear forces imposed LE flight bending stress spar greatest wing root Therefore spruce flanges resist bending stresses taper root Vs X Y8 tips A-in sheet balsa web sized resist shear forces maximum tips cut same balsa stripper used cut ribs Another strip per used cut trailing edges yet another employed cut center rib build strippers push knife blade through lump /2 X 2 X 2/2 balsa point blade protrudes dis tance equal thickness wood intend cut epoxy place Epoxy scrap piece /s X hard balsa spruce distance blade tip equal width strip required slight diverging angle blade cutting direction angle makes sure blade does wan der sheet being stripped cut -in-thick balsa sheet mount blade January1977 27 -in protrusion cut side -in sheet Add Sello tape similar reduce friction strippers very easy make strips cut secondsall exactly same size polystyrene foam LE cut hot wire made piece old controlline wire heated 12V car battery Both 3- 7-strand Laystraight CL wire available Britain has used successfully see no reason scrap length 018 line cannot used 12V makes wire too hot can modify battery tap off 6 8 IOV required Obviously commercial expanded polystyrene wing cutter available model shops better outfit ex pensive Blasta leading edges up now have heen cut homemade ar rangement Build LE cutting jig shown plan -in ply blockboard chiphoard make sure distance tween 1/32-in ply LE templates 19 base Z plate should 11 ate between LE tem plates 1 e Y foam sits 9 X 22 X between two plates d tip jig making sure 1/16 ply wing section template cen terline same distance above base plate 1/16-in hole through ost post can lump engine bearer Tie another piece control-line wire /8-in ply hot-wire T handle pass through post hole tie post Get some cheap electrical flex suitable bedside lamps etc join end hot wire battery About 8 volts should enough cut tips section template should 1/32 bigger around wing section required width ply LE cutting tem plate shown plan LE hot wire frame made X 1 soft pine upright arm H frame made pivot fixing cross member single screw nail bolt Knock nail top bot tom uprights Tie CL hot wire bottom two nails elastic between top pair tension wire elec tric flex about 6 ft used connect end hot wire battery screws cutter ready use Expanded polystyrene available country insulation contractors lo cated checking phone book will probably available 8 X 4 eets enough last year two Cut block 18 x 12 X 2 lay LE jig between templates practice cutting probably best cut down wards side templates gives better shape cut tips lay hot wire base plate behind template mounting post place 4 X 11 X 2 block against wing section template Run hot wire round template pulling time gently wire keep taut hesitate stop anywhere otherwise FASTaLASTA mDaYMOdW WLKENJ Shoot hobo 000 onootw 800 tp 3on4 w00d tn*obw 0m td00 ot.00 0000 nooton nonot000 otozIij noaonboIo0oo. b00 I0LEotIon t no tong 0000 on 001 thoonhnotd noo woo -Optonwt to0owod fi b000 0 900Ot ~o80oott b0onob Iwhq oopatooon hothod L 2 Towbog odgo donf boo onnoowit 000000 pI pbotofiono.0n0Ob __________Li Enpo boonon oooon00y onnotnootton0totOO oonoit000000gpgNALLE 4oott O anot w**on dy nito tonSSr35 Con 0000 no00110 ton LI] oofltg b0on otooP7 0th 0opay ononoononnt st-i Oqoonooglo ffrConto owotion ofrootiti 0 oott 0000- Zonqit Tqo*O00Wq - ton dw00L[T ibdnwbwwodo l -PoOIOon tonb IdfonlOowod tm 34 1n Eloblo twonon hd00 wobon -Ahod,obonth itobon 23 22 ISO 1oonbottony Pt ton0Iotodonononi X plot nwonobo b 000 nob 4Eho1 ton ST Ost 58 olonob 0 p1000 0ho0 000 ob Enwot pOditwo 100th 7 onEt hobo 2nqkwd00*1010I t hdt KooOo towikon oton 000 %obloopoon nontro ootnn3oaonnolo niton on0010 1ooply boiwonk ion ob*onwi -tdOTE LEoontonono ion 0000 nob 0000 nonnE 0 0oott 000000000000 000000t TopIon ply ono 00np on0 00 000000 towo 000 000* ro-notonownont 0*0 000000 WinO o00 000 tot oft ototog 0000000 *00w. 000 ooottod OpOonlolTE totnh onowoqo 0 0000 0 t b000 p000000 pOd 2oqbod Solontknon two toning ModIfy No 510 non, 00dm Sddqoo WnoOqtottO tW IolobtopS ton p00000BbotOon 28 Model Aviation Fl Eooqtoot0 /tboon SootnTE i ottod 30000 O00 10 0d.p 0 ton t odotkotfn000t 0opltn groove will melted surface tipwhich does matter much unless leading edge Once wire has pulled right round template move plastic forward about 1 lift block up away jig tip will fall out block will take long cut enough five ten models after experimenting bit different voltages wont cost much either model like others will prob ably break hits ground spruce center-section strengtheners stop abruptly along leading trailing edges attempt encourage wing snap points repairs easy instead next center rib may like encourage break notching TE points must point out however idea no proof will work should able make both jigs convert battery experiment bplyooototboodK plyooolokbodteoley e 000 oertdOhOt0t Ik-Soolto 7 I. gdeoe P0 Optod holbeed OOt p 5 OOly pO0teo pod olg Oqed khdlo hole doot hole 10 lb poeltoe edOptloeol Ighteleeg 1000 kotid 100g ot tot tho loWO Ore rO ototeeootoO5oOV eyoo Ipem eeerdttd eye Ioeg tot tt eev different voltages cut enough leading edge section tips four models couple evenings Once rib template balsa strippers engine bearer drill ing jig have made ready mass production Construction Make sign saying model am taking hours construct may last 10 seconds combat Now make another saying model 60 ft away flying 100 mph engaged combat will notice effect extra work Pin up above workbench remind spend time fiddling about silly details will assume going make four models combat next weekend Monday evening have already built jigs templates have pile tips LE sections Grab very light X 4 X 36 balsa sheet mark rib positions right across over plan using square trailing edge stripper strip four strips razor-plane chamfer rear /4 trailing edge sharp point leaving center section square meets tail plane Cut four 9 X / X ce strips 36-in length white glue Sellotape fix trailing edge position shown plan Sellotape holds spruce position glue drying bother remove tape read sign 2 Mark rib positions two 3 X 1/i X 36 sheets balsa strip 1/2-in strips rib stripper four strips become spar webs Strip four 3 X /i X 36 sheets down middle same stripper 9-inlong rib template laid top strips cut rib tapers TE notch Use template mark front rib Remove template place small metal square strip cut rib free simple perfectly accurate cross cut Only 31 go Take two /s X /s spruce strips hack taper end both measure /i square tips glue webs white glue epoxy clamping about 20 spring clothes pins like can set about 1/64 edges web save having get perfect edge alignment Fit two /i X /8 centersection reinforcing spruce strips other side web set aside dry Modify No 5 rib front fit web same other three spars Cut balsa center rib center rib stripper Cut tapers crank mount holes TE tail notches center rib 12 long continued page 9] January 1977 29 31h I. 2 jeokee oP otttoeoketloedeg ge - PIOokOtOooOo Ootteg pg e0g hod reh Wilkens left Frank Smart holding two FAI planes just show big much Fast Blasta like Airfoil plans left self jigging flies very well Lhooflleg -be 2eqked Shereshaws beautiful big cabin machine Gene has 24 ready go Shortly will shipping parts kits Dallaire Sportster won RC Antique 76 SAM Champs Trenton Ter ror Miss America beautiful sevenfoot Buccaneer Super Buccaneer oldies goodies biggies Postscripts will end up months column bi-monthly plea puts readers Next column will report results Scotty Mur ray Memorial Annual Pensacola Although home still Pensa cola am working Washington DC Please address correspondence Jack Bolton 8W7 Ferncl CL Spring field VA 22153 phone 703 455-3089 please include SASE Fast Blasta/Wilkens continued page 29 yougetsixoutofa3 X sheet Cut 1/32 ply cap strips top incorporates pushrod slot White glue Sellotape again Tuesday Cut A-in ply crank mounts drill crank bolt holes suit 3-in belicrank mounting bolts British Micromold 3 nylon crank shown plan crank can used use pushrod hole nearest bolt Insert crank bolts add cranks leadouts pushrods Make Z-bend 1/16 music wire prevent falling out crank Cut out four delta tails 4 X 36 X /s soft balsa sheet extend front tail adding 1 X /i balsa strip tail use 5-in sheet can buy Cut Y8-in soft balsa elevators round off edges sandpaper No fancy airfoilsread signs tailplane flat edge table elevator right angles down over table edge stick top I-in wide Sellotape hinge pressing tape crack Turn lot over repeat operation Bend elevator up down dozen times check hinge OK cover side tail elevator single piece Fascal Solarfilm again elevator right angles tail Turn over re peat Number ribs cut leadout holes Use white glue Hot Stuff assembly components except LEs tips may fixed Hot Stuff First stick ribs including center ribs onto trailing edges using plan guide Remove pegs spars lay spars front end down build ing board up end rib/TE assem blies dropping vertically posi tion spars crosspinning ribs white glue sets Make sure tip ribs square spar viewed rear otherwise may get unwanted tip dihedral Remove some covering tailplanes touch center ribs cut out 1/16-in balsa tail packing pieces glue tailplanes glue tailplanes center ribs TEs should have spent eight hours total time reaching stage White glue Sellotape pin LE section place trim ends flush tip ribs using knife razorplane new blade Make leadout holes through inboard tips rat-tail file use hot pushrod melt /8-in dia hole takes practice try first scrap chunk foam go I-in long /8-in dia aluminum brass copper leadout tubes Epoxy place smear epoxy round holes round edge tip reinforce plastic shown plan Fix tips place epoxy white glue Wednesday go control assem blies X 1/32 ply bellcrank stops center-section sheeting Make up pacifier pods fix place add covering support strips /s balsa After removing some covering elevator epoxy 1/32-ply horn mount ing plates place Add balsa tip gusJanuary 1977 91 SoIuFiIm TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA CN AA HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS Aena HOT FUEL PROOF DOPE AWARD WINNING HI-GLOSS AND FLAT FINISHES AVAILABLE IN OVER 36 COLORS IN BRUSH AND SPRAY ptIia Industries InC 7060 HOLLYWOOD BLvD. LOS ANGELES CA 90028 sets sandpaper frame smooth spend ing about five minutes model much sandpaper Add Fascal Solarfilm tail fairings top bottom Thursday Test iron temperature scrap chunk plastic melt LE tips cover models using separate pieces tips Note cannot cover model silk paper nylon because dope melts polystyrene suppose could cover tips LE first paper glued diluted white glue worth time Remember heat melts polysty rene Go steady heat gun iron shrinking covering Dewarping wing over gas stove front electric fire bit risky unless mask LE tips heat sheet balsa chunk cardboard Friday Cut 1 1/32-in wide section leading edge away back spar al low motor mount butt up against remove some covering under bearers will fit wing 1/32-in ply plate eases construc tion increases strength mo tor mounts Mark bearer spacer positions ply build engine bearer assemblies Trim ply away tween bearers fit over wing spar Sellotape nacelles assemblies along motor prop motor-mount bolts nuts plates Slide assembly onto model test CO pins set back leading edge shown plan Adjust motor position obtain CO trimming bearer spacers leading edge re B Pwher7 4 7 6 78 50% SrZeseach84 86 88 65% 5/3 5y0494 96 97 98 63 64 30%i04 10685% 8685%114 116 11-8 961065i 3 BlaJe Trtor 5354 63 6-4 50% 3 BIde Posher 6350% RC 124 125 176150 ORISH BROS ST jOHN INDIANA 46373 quired Remove assembly Drill bolt holes Using drilling jig guide fit some 4-40 blind-mounting nuts epoxy nacelle bearer assemblies complete mounts wings Side-thrust easily obtained want sticking mounts 10 20 offset necessary un less fly very windy conditions Drill 3/16-in hole right through bearers center rib crank mount shown plan insert 3/16-in dia dowel prevents crank mount leaving model during pull test Repeat procedure three other models /8 dural engine mounting plates shown plan cut down vibration make unnecessary cut ply under crankcase glued bearers motor Two coats dope fuel proof er applied mounts after epoxy fillet has smeared round motormount/leading-edge joint prevent gress polystyrene solvents dope glass fiber resin Glass fiber need applied ply stops bearers cracking up Fuel-proof 1/32 ply horn mounting plates elevator fuel-proof Inside fuel pod Saturday morning Youve done very well considering arent familiar model have now fit nylon control horn Kavan medium shown connect Kwik-Link pushrod horn Dewarp model before flying using steam kettle heat gun Flying Fly model level check isnt banking out Fly inverted check same line tension differ ent now outboard tip visible missed removing warp Remove fore flying tight turns model may crash warps have removed fly wide consecutive loops tighten up much possible Note whether outboard wing suddenly drops flies wider 1oops inboard wing simultaneous 15-20% reduction airspeed happens wing has stalled because too much elevator movement Try same procedure outsides before landing drops wing 1oop direction reduce ele vator throw stalling direction refly still stalls move link higher hole horn will need elevator movement windy days satisfied turn per formance add weight tail until Wrap solder round horn make sure model doesnt become di rectionally unstable after doing must still able flicked rocksteady level flight may advantageous building batch models test fly find CO position suits best before glucing motor mounts other models chaps know much about Honking 35s must ex periment find best prop fuel suit needs model intended fly super fast intended turn prop fit must lesser pitch normally use motor right gear sharp corners used 9/6 Rev Up wood Nats 20% fuel got about 95 100 mph level turned about same speed honking streamlined ships Practice Flying universal defense maneuver wiggle whereby model flown zig zag flight path towards ground wingover model directly overhead fly Fig 1 dozen times check gap FIG 1 12 FT GAP CRflI INn should big enough fit least half-loop aim re duce 1-2 ft starting pattern 4 FIG 2 4 92 Model Aviation MORE wMTCC taster ofl same power YELLOW PROPELI G08eesed e~o ~O9 o ADE Metallic Alumiuum S 8W 8-6 88 125 96 106 104 150 106Poshee CtVV150 Fast Blasta continued N WSPAPER mm IIVDP hobby centerinc bit lower time inverted wingovers wiggle up down 455 axis finally dog-leg axis Fig 2 five points maneuver model changes its ioop direction points loop may continued round position behind opposition five opportunities occur ring two seconds throughout match will long before following opponent Remember speed side flying level model much slower its smaller streamlined cousin enough prevent making get-away level flight So instead trying imitate jet anyone can predict therefore intercept must fly model wasp buzzing round jar honey make almost impossible opponent zero accurate ly fly level 1/10 second otherwise some whizz kid will convince himself sitting duck turnspeed probably equal pos sibly better opponent turn radius smaller model capable staying behind others day up put worst thing can lose sight target close following reduces chance happening enormously Watch opponents model copy everything does does matter very close behind him first can cut corners close gap after first couple turns try cuts back streamer Remem ber cannot line up until quit following quit have worry much about line tangles opponent expert flier will prob ably lead Close following again helps sort out line tangle does occur because easier remember flew mutual cooperation can fly out way flew theory anyway forget kill ahead points model sprayed-on color doped finish prefer have brownline run off original vellum manner keep original copies course same Thus draw ing insignia little off scale some dimensions will least uniform brownline first backed adhesive transfer tape colored felt-tip pen Except white use latex white-out After colors successfully done cut out patch peel off tape backing have applique model has colored Japanese tissue finish applique can made using Japanese tissue keep feel model constant would keeping see-through look lightly constructed model Searching good documentation particular aircraft may well lead finding building another interesting model have built decorated model liked built again improve ments flying dr changes struc ture decorated another color scheme second time have same basic airplane completely different model WHEN FIRST started column stated rules would discussed Well shanie having known 4 OlWELL T4ATh ONL MNE INCI4ES ON ThE TALE MAP rule book error rubber scale scoring Rule 507 remember pro posal total score being lower two scale judging flight points seeing book assumed pro posal passed intent proposing using lower score eliminate ghost ships scale competition However just doesnt work way flying conditions bad flight scores will low model wont fly well because spectator damage com plexity choice subject builder re ceives no reward scale con struction effort believe because scale events events reward builder workmanship scale fidelity flying ability three areas should equally considered determining winners fore have submitted rules change pro posal limiting maximum flight points same fifty 50 given workmanship scale fidelity should make opinions proposal known district scale contest board member Ralph D Kuenz 14645 Stahelin De troit Mich 48223 January 1977 93 Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground Price $3495 kit per doUar bar em GREATEST R/C SSBASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andrews Aircraft Modri co Inc 155 Rte 1& North St Topafield Mass 01983 8878541 Support AMA FF Scale/Kuenz continued page 40 Delicate looking Castalbert IV Peanut Old Timer built Stan Fink Walt Mooney plans Photo Carol Cogswell