SHOWTIMEWhile column sched uled publication June 1984 issue MA being written month Feb mary time year Northeast Westchester Radio Aeromodelers Inc WRAMS hold 16th Annual Radio Control Show Westchester County Center White Plains NY show well others held around country advertised RC shows generally include pro motion Control Line other aero modeling categories However should way stop CL other model ers attending RC manufacturers will have sorts items display can used modelers Some come mind fuel tubing control horns model cover ings modeling tools retracting gear units props new lines engines particularly enjoy visiting booths picking up latest catalogs con cessioneer has offer slight cost involved catalogs come handy during year part product reference library shows also give opportunity review old see whats new RC Scale models might well suited CL use As usual Top Flite advertising seven WW II 60-in Stand-Off Scale planes such good flying models Royal Products also hand information wide range Precision Stand-Off Scale kits Royal kits range size 32-in Pitts S-2A 84-in Douglas C-47 excel lent flying models majority kits balsa use built-up construction makes easy conversion RC CL models See December 1982 issue MA RC-to-CL conversion article also liked F7F Tigercat RC Kits 706 Easton NE No Canton OH 44721 F7F has wingspan 72 weighs about 12 lb looks like could good Stand-Off Scale Sport Scale CL proj ect Two other models thought would make good Control Line Scale projects though theyre little large82-in wingspans TBF-l Avenger Mikoyan-Gurevich MIG-3 Avenger said weigh about 11 lb MIG-3 nine-lb range engines 60 90 size recommended Both models avaialble Bob Dively Model Aircraft Inc 28001 Chagrin Blvd Suite 206 Woodmere OH 44122 must stop WRAMS show Harry Higleys booth say Hello look over great assortment special ized model tools addition widelyknown tubing- wire-benders long wheel-collar wrenches special heavy light custom prop nuts Harry very good selection generally-hard-tofind taps dies taps dies ranged sizes small 2-56 -32 standard glow plug thread size Harry has just added carbide-tipped scriber new book called Master Modeling product line scriber has solid car bide point set blue-anodized aluminum handle Master Modeling book follows same easy-to-understand format used Continued page 166 two biplanes show different approaches handling problem belicrank mounting leadout wires type plane Ron Sears Pontiac Ml Nats-winning PT-17 Stearman L mounted beiicrank iower wing ran leadouts through wing out tipjust like monopiane CL models Ed Robinsons Hastings NY Sopwith Camel R has bellcrank mounted up fuseisge leadouts run out through side fuse through guide attached wings interpiane struts Bill has good discussion topic column Ron chose internal system Precision Scaie model could have cockpit detail two RC Scale models Bill saw recent WRAMS expo lie thinks good subjects conversion CL Sport Scale both feature large cowlings would allow large engines completely enclosed plane left Grumman TBF-1 Avenger WW II torpedo bomber Bob Dively Model Aircraft Inc right Grumman F7F Tlgercat RC Kits discussion column June 1984 71 THIS FUEL FEATURES ORUST PREVENTION AGENTS ODETERGENTS SLUBRICAllON WITH HIGH FLASH POINTS WETTING AGENTS FOR MORE EFFICIENT AND DEPENDABLE FUEL FLOW eANTI-FOAMING AGENTS TO PREVENT LEAN RUNS KEEPS YOUR ENGINE RUNNING COOL OAN ODORLESS HIGHLY REFINED FUEL CHILDPROOF LIDS Available FAI 5 10 15 25 & 40% Nitro-Methane Contents Formulated synthetic lubricants Also cNailade castor DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT This competition fuel fast becoming THE CHOICE vMh top protesionals first cash product Contact us price structures ordering information Manufacturers Major Brand Distributors Model Engines Kits Rodos Accessories SUPER K Fuels brand KINGS RADIO CONTROL HOBBIES INTERNATIONAL 3960 West 16 Ave HIalech Florida 33012 305 557-2024 can made example need firewall positioned 30 downthrust relative centerline fuselage will need set pointer 30 draw lines along pointer wire top gauge along top gauge pointer wire outward template can cut along two lines used guide mounting firewall Several other variations theme possible course depending upon imagination specific needs Hope fully small implements wiH help become accurate consequently bet ter builder model aircraft really what aboutmost time anyway CL Aerobatics/Fancher Continued page 70 speed weight line length diameter air density etc nonetheless true total affect will negligible remotely normal Stunt ship plane properly trimmed leadouts will exit wingtip point three degrees aft center gravity have just located bellcrank pivot plus minus less degree point spar should located tip rib Allow small amount fore aft adjustability pointbut Im willing bet youll end up both leadouts within / inch plotted location Now just draw wing tip choice construction details feel appropriate lets get fun stuffthe fuselage fuselage fun because best place let creativity run rampant Aside locating important pieces right places body like Spinners rudders cowls canopies grist creative mill Lest get carried away however start plotting following convenient horizontal refer ence line usually use top main fuse side spinner backplate 2 Wing leading edge 3 CG 4 Flap hinge line 5 Wing flap trailing edge 6 Stab leading edge 7 Elevator hinge line 8 Elevator trailing edge vertical reference line plot fol lowing locations Engine thrust line 2 Wing centerline Another hint Try keep thrust line wing centerline within 50% wing thickness other Since wing will primary source drag having large distance thrust line will create substantial pitch trim problems 3 Stab centerline 4 Wheel/ground contact point located vertically allow adequate ground clearance largest prop plan use horizontally located respect center gravity Now draw wing stab cutouts let yourself go Just remember anything draw youre going have figure way build reasonable weight last major component top fuselage stab/elevator ease drawing save room usually half top view shown Critical measure ments limited width should dictated size engine crankcase Measure let fuselage grow naturally ie crankcase plus two engine mounts plus two doublers plus two fuse sides equals fuse thickness Firewalls formers simply plotted top bottom views located tween wirtg fuse top view respective longitudinal location right half stab elevator drawn part top view now down nitty gritty detailed want completed drawing drawing planned publication will want letter using lettering guide also put some caption material such models name designers name critical dimensions etc Consider using Letraset dry transfer lettering captions gives very professional lookand besides gives something old Letraset sheets drying up drawer under jockey shorts Include explanatory notes design items may easily illustrated plan such wing asymmetry wood types grades manufacturers names commercial items recom mend Last least have nerve original ink design pub lished inked drawing worth much additional $100 pocket hope has proved helpful Perhaps another time can spend some time dis cussing what numbers data sheet should really can design way top better mousetrap especially tailored particular talents After thats what makes Stunt greatest modeling events really way skin cat Fly Stunt Ted Fancher 158 Flying Cloud Isle Fos ter City CA 94409 CL Scale/Boss Continued page 71 Harrys two previous books No Secrets Handbook Miniature En gines new book loaded how-to-do pictures written descrip tions covering topics such scaling up three-views layout building wings fuselages very well-detailed structions anyone wanting make model parts fiberglass book has something beginner well experienced modeler especially good Scale modeler does own design parts fabrication book well worth price $1095 detailed listing items available Harry B Higley & Sons write PO Box 532 Glen166 Model Aviation specially formulated chemically balanced fuel top performance minimum engine wear weather condition CLEVGIANTS GIANT SCALE BUFFS ~ILAND Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS C-D QUALITY MASTER MODELS PLANS 77 Lecconthe Seden $25 gdPekker 57 Pt $3Pt 73 N Mtch Rorrrb $4 60 Heecord Pete Race $32 65 MMeracder 8-26 $42 ~-- 70 Boyle Ge-Bee $32 78 Soprnitfr Pep$24 bOS perocerine S6B $24 81 OH Moaqoito Sb $38 perrnorine S6B $32 108 OH MoqeBonrb $48 62 C Hoeck P6E $36 61 Corti. Robin 005 $16 94 C fleck P6E Ptt $54 88 Sleet PT17Koydet $48 kfc.4 Vego $24 99 NBIk Widorn P61 $65 92 flee ft Parl LNB-4 S28 71 DoegSC-3 Tran $29 74 Doo Ill. G-B 11 $39 93 DoegOC3 Tren $45 95 eooepe Sport $36 86 Hecb Tenoco 12 $32 858o Sprtelldog $39 108 Cer02U1/4 L&S $56 07 Aerence C-3 Spt $35 78 Arrn SptPer. A2 $3e 61 Soegle 038 Ob $24 60 Doeglo M-2 Moil $24 122 Doegle 0-38 Ok $49 68 Brittol Belideg FIr $30 94 Pege Cert Rocer $45 59 BrocotgeceMeLA $54 71 Merlin BlO Bonrb $29 107 Gino Boocct POP $54 7R Ternere WW Roc $35 73 Trenel Air 6000 $24 64 Cer GecIrk P1 1C2 $39 107 Mert MR-i Bern $44 94Cer GocIrk FI1C2 $54 91 Liodberg NO211 $39 66 Deflon Cornet Roc $24 61 AEG GIV LI Born $24 62 HecoMrMelligen $35 108 PoirchPT19 Tr $59 &.. 94 HocoMr Melligon $45 90 Wore Teper-Wing $39 63 Bornog P26A PIr $36 75 W6lId Lycender $32 e 84 Borneo P-26A PIt $48 ISO Weerid Lyconder $49 69 Waco C6 Cabin $36 57 Ford Trirnlr 4-AT $28 64 Beech C17-B Slog $38 76 Por4 Trirntr 4-AT $45 % 96 Beech Cl7-B Slog $492 114 Pard Trirnlr 4-AT $59 55 Leek 11 Electra $24 04 Bed-Joyce XPJ-2 $56 Lank 11 Electra $32 93 Loeniog C-2Arnph $69 63 Stincee 01W SRi $16 58 GrernJ2P Deck $39 en TIW 5R7 $24 78 GrernJ2P Deck $56 eon TIW SRi 532 59 Golha G1V Bern $22 el PIt P2-B $20 117 Gothe G1V Bern $39 ol Pt P2-B $32 68 Gong 0-46A Ok. $32 tel Pt P2-B $45 108 Sibot S-38 Arnph $49 Peece Spec $45 60 Bee ITO Sport $36 63 Skyrocket SPSP-1 $20 90 Bee 100 Sport $49 56Ccr Warfrk P40 $24 90 SlineALorn Wing $56 - 78 Lock Lighlng P38 $38 80 Merlin 74 T4M-1 $39 56 Rep SeeBee Am $24 75 HPge 0400 Bornb $30 SeeS Arnph $39 100 8-Pge 0400 Bern 549 er J3 Cek 039 65 MChine Clipper $50 Hedeen Sorb $38 97 MChina Clipper $69 rn P6F Hellcat 028 71 lecocen C2 Airlin $24 ng R-l7GFort$29 66 R5133 80 Jengrn $292 R-17G Fort 049 68 Bren-Winklo Bird $45 ri Whirecind 824 54 Cert Scoift XP934 $28 Nacion $29 63 Lindkerg ISirie $24 trance VTeil $39 55 HrnkrHicd PIrorn $32 INO KITS AVAILABLEIPrice cebject chonge ..pgq Olher Sceles Sice frern 6 Span Coorplele Pattern 25c Add 10% order far chipping & in. etc raUSA Coo & Moe Elcenchere add 15% 120% airl PrIe al catalog $1 50 Price lid dentin alone 55c *lby err foreign add $1 001* ~jrCLEYELAND MODEL& SUPPLY Co 103070 DeteejI AneClenaloed Ofia 44102 wood IL 60425 Back basics Bill Sketon Warrenton OR wrote asking What best place install belicrank leadouts biplane much outboard wing weight should used Bills question prompted fact has just ob tained kit Bucker Jungmeister has much previous biplane build ing experience placement bellcrank biplane much different other CL model should mounted onor slightly behindthe center gravity CG generally found front cockpit area biplanes build biplane CL kit would likely find plans showing bellcrank mounted CG area just de scribed1 point between top wing midpoint fuselage type installation requires cut holes fuselage skin leadouts addi tion leadouts must supported some point between fuselage wing tip usually done support mounted outer wing struts can seen accompanying photo Ed Robinsons Sopwith Camel arrangement poses no problem Sport Scale model no points awarded cockpit detail bad Scale modeler desires make Precision Scale model requires full cockpit detail Another approach bellcrank mounting biplane demonstrated Ron Sears PT-17 saw t83 Nats Ron mounted bellcrank leadout wires wholly within lower wing permitted full cockpit detail installed also did away need cutting holes fuselage having familiar leadout support mounted between wing struts placement bellcrank leadouts did make difference either models flying characteristics both great-flying planes other part Billts question much wing tip weight outboard wing According scale-biplaneflying friends amount weight used models about same other CL Scale planes model medium-sized 4-5 lb using 018 wire two three ounces used model large 6 lb 021 027 lines used three four ounces weight probably needed Northwest Regional Control Line Cham pionships will big doings Eu gene OR over 1984 Memorial Day weekend May 26 27 Eugene Prop Spinners Club cooperation other Northwest clubs individuals will hosting Northwest Regionals 84 CL contest two-day contest will have 25 events trophies through third place events addition $2000 worth mer chandise prizes will awarded special interest readers column clusion two Scale events Profile Pre YOUR GUARANTEED SATISFACTIONA Gccecc eALUE COMES WITh 80 GRIT CLOTh SANDING BELT THE SANDING BLOCK THAT WEARS BELl block made TOUGHLIGHTWEIGHT HIGH IMPACT STYRENE T EVER BREAKS WE WILL REPLACE IT FREE uses same size belt 3x18 electric hand sanders might ask WHY USE expensive belts instead cheapert sandpaper WHY BECAUSE BELT IS MORE DEPENDABLE DURABLE ECONOMICAL EASIER TO USE glueing tacking clamping sandpaper other type block Belt will slip wrinkle tear causing unwanted marks gouges finished work 1 RESIN BONDED BELT WILL GIVE YOU AT LESS COST MORE TROUBLE FREE SANDING THAN 10 SHEETS OF regular sandpaper sandpapersanding blocks can waste up 44% its sand paper just hold itself block BELT IS EASILY CHANGED IN SECONDS WITHOUT ANY DAMAGE AND SO BELT MAY BE SAVED AND USED ON MANY OTHER JOBS Since belt SO QUICKLY CHANGED pick right type grit size belt MAKE YOUR SANDING JOB EASIERSimple Use. PUSHSMALLENDOFWEDGETO THE RIGHT TO OPEN IT AND PUT THE BELT ON LEFT SIDE OF BLOCK SLIDING IT OVER TOP PART OF WEDGE CUSHION PAD ON BOTTOM GIVES SMOOTH FINISHING FOR LONGER BELT LIFE u2 SLIP THE SANDING BELT INTO PLACE AND SNAP THE WEDGE SHUT THAT IS ALL YOU DO HARD FLAT SURFACE ON TOP OF BLOCK FOR TRUE FLAT PRE CISION BUTT SANDING TO GET NEW CLEAN SANDING SURFACE AS NEEDED JUST LOOSEN WEDGE AND ROTATE BELT USE ALL 54 sq inches CHECK AT YOUR LOCAL HOBBY SHOP FOR WEDGE LOCK IF THEY DO NOT HAVE ONE ASK THEM TO GET SOME will send PREPAID 1 WEDGE LOCK BLOCK comes 80 grit cloth belt 3 EXTRA RESIN BONDED BELTS COST OF INTRO DUCTORY OFFER JUST $1000 Please fill Out coupon circle 3 belts want coupon mailing label IF YOU HAVE BLOCK AND JUST WANT BELTS WE WILL SEND YOU 6 BELTS FOR just $1000 ASK YOUR HOBBY SHOP TO CARRY BELTS Blech $800Resin 000404 BRIIO $200 egPostage & Nottdllng $200 $1000COUPON SPECIAL$1000 BELTS ALUMINUM OXIDESILCON CARBIDE 80-100-120-150-180-220220-280-360-400 FROM ART GROSS ENTERPRISES206 743-9332 12516 MAPLEWOOD AVE EDMONDS WA 98020 TO June 1984 167 Box 1063 Lorain Ohio 44055 Ph 216282-8354 Peanut Scale Models P1W Vqabmi J Piper Cob SlIm 125 Outdoor kIte inch. 3495 LIght Indoor kits mach. 3495 Sport Scale Models 22 Span PC-S Porter Taylor Cr10 Slloson Voyager Rubber CO2 Power Kilo ach. 3695 An Embryo Model willi ise Span dosigned wiol boginoers ~rt$. 3695 HARD-TO-FIND ITEMS FOR YOUR BUILDING NEEDS Early Bird TISsue f Dr Antique Aircraft 3595 True Olde Japanese Tissue 10 3 colors 95 Japanese Tissue 12 6 colors 3395 MiCrolite Plain3325 Silver3395 Microfilm Glue 3160Solvent 3125 Condenser Paper 3 sheets3375 Plan Service over 17 Scale Sport Scale & Peanot Scale Rubber Strip 020 thru 085each 3175 3/32 tfiro 5/32each 3195 Winder 61 395 Mark 1161 195 Complete Line Brown CO2 Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage mom Postage 3150 COMPLETE CATALOG 3150 Smithsonians Air Space Museum just pleasant walk So nearly everything else come Washington see modest rates give soft landing heart downtown Free over night parking Goad food reasonable prices Cafeteria Sandwich Shop Cocktail Lounge cision Scale Other major event categories Combat PAMPA Stunt Navy Carrier Speed Racing contest will held Mahlon Sweet Airport model flying site has asphalt four grass circles site also has bleachers PA system drinking foun tain spectator control fencing addi tion great flying site conditions will camping space concession truck hobby shop various model-related displays Lodging said available within few minutes drive flying field Saturday night May 26 Seattle Skyraiders Flying Lines newsletter will host Pot Luck Party field Sounds like will great contest full details contestand especially local rules Profile Scale eventwrite John Thompson 1411 Bryant Avenue Cottage Grove OR 97424 Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Racing/Ballard Continued page 72 because have capable pilot close can count being available contests recall made straw poll Nats about possibility 21-size engines being specified Rat some little reluctant personal mostly big-dollar investments reasons recognized need would like ask RAC support fol lowing changes incorporated new supplemental event 1986-87 complete replacement 1988-89 new event would bring forward existing Rat rules except limiting maximum engine size 35cc 2135 cu Additional topics might need addressed individually would Single room $32 up Family room $46 up Ask about 10% dIscount AMA members 8004248532 k11 fiec HOTEL HARRUTON 11th & E Sts NW Washington DC 20004 1 Line size suggest keeping lines 018 solids two primary reasons strength safety increase drag di minish ultimate top speed reasoning takes following path First piano wire specified AMA rule book avaialble competitors stainless steel stainless steel less liable corrosion rust piano wire its strength least kinds wire avail able modeler range 80% piano wire current Rats unsafe 018 stainless However 21 Rat would quite safe using lines Second ul timate performance Racing model greatly governed horsepower avail able drag model system can use current Scale Racing supply data poiht good Scale Racer SR will run mid 14s seconds using 15 cu engine 60 ft 014 solid lines horse power nominally equivalent dis placement 21 same model would yield 14 times much horsepowerwhich would result speed increase about cube root 14or about 12% SR goes 125 mph 140 mph result Now up line size 014 018 drag lines will increse 28% linearly diameter order maintain same speed will need over twice horsepower 128 cubed Alternatively same horsepower speed will drop until drag previous level about 13% square root 128 140 mph SR back about 123 mph Now assume model streamlined SR get back about 130 mph estimation 2 possible low-nitro supplied-fuel rule should incorporated suggest use same formula now Slow Rat rules However suspect will want leave Rat un limited event existing proposed limitations Slow Rat would like pass fol lowing two questions the RAC 1 What future Slow Rat 2 What should about future course would suspect have own answers questions would like present believe future Slow Rat very dim events original purpose provide event could gotten larger portion CL modelers Rat since Rat mid-Seventies people could handle tried structure event provide official AMA Racing alternative performance-level obtainable capable being flown lesser skills required Rat original proposal disallowed Schneurle-ported enginesa proposal never made initial set rules What has happened history performance curve has made Slow Rat another event unreachable except two capable pilots disposal changes year will helpthe 10% fuel will temporarily slow event back lower speed foresee fairly rapid return performance levels near beforeagain unreachable less-than-great Slow Rat decaying contestant involvement just previous events have allowed reach too high performance level believe something needs done Slow Rat salvaged have several suggestions youve seen before would like RAC think long hard maybe support 1 Engine availability performance levels must addressed no com petitive 35s available market today K&B 58s nonexistent Tune 36/OS 36 no longer available propose choose engine class provides large choice compatible engines such class Quicky 500 engines RC boys use front intake single-bypass-port 40s several different brands competitive being Como K&B HB available good hobby shop can purchased discount magazine advertisement en gine class along 10% nitro limi tation would wise choice Anther class consider might 35cc engines described above Fast Rat Again would have significant decrease ultimate horsepower significant increase availability 2 Plane configuration typical Slow Rat 300 sq wing area difficult build other types models used competitive flying ever lot work put together might consider canges much simpler modebut corresponding decrease horsepower made Quickie Rat design use area proContinued page 170 168 Model Aviation FROM HOTEL HARRINGTON WASHINGTON IS JUST SHORT GLIDE
Edition: Model Aviation - 1984/06
Page Numbers: 71, 166, 167, 168
SHOWTIMEWhile column sched uled publication June 1984 issue MA being written month Feb mary time year Northeast Westchester Radio Aeromodelers Inc WRAMS hold 16th Annual Radio Control Show Westchester County Center White Plains NY show well others held around country advertised RC shows generally include pro motion Control Line other aero modeling categories However should way stop CL other model ers attending RC manufacturers will have sorts items display can used modelers Some come mind fuel tubing control horns model cover ings modeling tools retracting gear units props new lines engines particularly enjoy visiting booths picking up latest catalogs con cessioneer has offer slight cost involved catalogs come handy during year part product reference library shows also give opportunity review old see whats new RC Scale models might well suited CL use As usual Top Flite advertising seven WW II 60-in Stand-Off Scale planes such good flying models Royal Products also hand information wide range Precision Stand-Off Scale kits Royal kits range size 32-in Pitts S-2A 84-in Douglas C-47 excel lent flying models majority kits balsa use built-up construction makes easy conversion RC CL models See December 1982 issue MA RC-to-CL conversion article also liked F7F Tigercat RC Kits 706 Easton NE No Canton OH 44721 F7F has wingspan 72 weighs about 12 lb looks like could good Stand-Off Scale Sport Scale CL proj ect Two other models thought would make good Control Line Scale projects though theyre little large82-in wingspans TBF-l Avenger Mikoyan-Gurevich MIG-3 Avenger said weigh about 11 lb MIG-3 nine-lb range engines 60 90 size recommended Both models avaialble Bob Dively Model Aircraft Inc 28001 Chagrin Blvd Suite 206 Woodmere OH 44122 must stop WRAMS show Harry Higleys booth say Hello look over great assortment special ized model tools addition widelyknown tubing- wire-benders long wheel-collar wrenches special heavy light custom prop nuts Harry very good selection generally-hard-tofind taps dies taps dies ranged sizes small 2-56 -32 standard glow plug thread size Harry has just added carbide-tipped scriber new book called Master Modeling product line scriber has solid car bide point set blue-anodized aluminum handle Master Modeling book follows same easy-to-understand format used Continued page 166 two biplanes show different approaches handling problem belicrank mounting leadout wires type plane Ron Sears Pontiac Ml Nats-winning PT-17 Stearman L mounted beiicrank iower wing ran leadouts through wing out tipjust like monopiane CL models Ed Robinsons Hastings NY Sopwith Camel R has bellcrank mounted up fuseisge leadouts run out through side fuse through guide attached wings interpiane struts Bill has good discussion topic column Ron chose internal system Precision Scaie model could have cockpit detail two RC Scale models Bill saw recent WRAMS expo lie thinks good subjects conversion CL Sport Scale both feature large cowlings would allow large engines completely enclosed plane left Grumman TBF-1 Avenger WW II torpedo bomber Bob Dively Model Aircraft Inc right Grumman F7F Tlgercat RC Kits discussion column June 1984 71 THIS FUEL FEATURES ORUST PREVENTION AGENTS ODETERGENTS SLUBRICAllON WITH HIGH FLASH POINTS WETTING AGENTS FOR MORE EFFICIENT AND DEPENDABLE FUEL FLOW eANTI-FOAMING AGENTS TO PREVENT LEAN RUNS KEEPS YOUR ENGINE RUNNING COOL OAN ODORLESS HIGHLY REFINED FUEL CHILDPROOF LIDS Available FAI 5 10 15 25 & 40% Nitro-Methane Contents Formulated synthetic lubricants Also cNailade castor DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT This competition fuel fast becoming THE CHOICE vMh top protesionals first cash product Contact us price structures ordering information Manufacturers Major Brand Distributors Model Engines Kits Rodos Accessories SUPER K Fuels brand KINGS RADIO CONTROL HOBBIES INTERNATIONAL 3960 West 16 Ave HIalech Florida 33012 305 557-2024 can made example need firewall positioned 30 downthrust relative centerline fuselage will need set pointer 30 draw lines along pointer wire top gauge along top gauge pointer wire outward template can cut along two lines used guide mounting firewall Several other variations theme possible course depending upon imagination specific needs Hope fully small implements wiH help become accurate consequently bet ter builder model aircraft really what aboutmost time anyway CL Aerobatics/Fancher Continued page 70 speed weight line length diameter air density etc nonetheless true total affect will negligible remotely normal Stunt ship plane properly trimmed leadouts will exit wingtip point three degrees aft center gravity have just located bellcrank pivot plus minus less degree point spar should located tip rib Allow small amount fore aft adjustability pointbut Im willing bet youll end up both leadouts within / inch plotted location Now just draw wing tip choice construction details feel appropriate lets get fun stuffthe fuselage fuselage fun because best place let creativity run rampant Aside locating important pieces right places body like Spinners rudders cowls canopies grist creative mill Lest get carried away however start plotting following convenient horizontal refer ence line usually use top main fuse side spinner backplate 2 Wing leading edge 3 CG 4 Flap hinge line 5 Wing flap trailing edge 6 Stab leading edge 7 Elevator hinge line 8 Elevator trailing edge vertical reference line plot fol lowing locations Engine thrust line 2 Wing centerline Another hint Try keep thrust line wing centerline within 50% wing thickness other Since wing will primary source drag having large distance thrust line will create substantial pitch trim problems 3 Stab centerline 4 Wheel/ground contact point located vertically allow adequate ground clearance largest prop plan use horizontally located respect center gravity Now draw wing stab cutouts let yourself go Just remember anything draw youre going have figure way build reasonable weight last major component top fuselage stab/elevator ease drawing save room usually half top view shown Critical measure ments limited width should dictated size engine crankcase Measure let fuselage grow naturally ie crankcase plus two engine mounts plus two doublers plus two fuse sides equals fuse thickness Firewalls formers simply plotted top bottom views located tween wirtg fuse top view respective longitudinal location right half stab elevator drawn part top view now down nitty gritty detailed want completed drawing drawing planned publication will want letter using lettering guide also put some caption material such models name designers name critical dimensions etc Consider using Letraset dry transfer lettering captions gives very professional lookand besides gives something old Letraset sheets drying up drawer under jockey shorts Include explanatory notes design items may easily illustrated plan such wing asymmetry wood types grades manufacturers names commercial items recom mend Last least have nerve original ink design pub lished inked drawing worth much additional $100 pocket hope has proved helpful Perhaps another time can spend some time dis cussing what numbers data sheet should really can design way top better mousetrap especially tailored particular talents After thats what makes Stunt greatest modeling events really way skin cat Fly Stunt Ted Fancher 158 Flying Cloud Isle Fos ter City CA 94409 CL Scale/Boss Continued page 71 Harrys two previous books No Secrets Handbook Miniature En gines new book loaded how-to-do pictures written descrip tions covering topics such scaling up three-views layout building wings fuselages very well-detailed structions anyone wanting make model parts fiberglass book has something beginner well experienced modeler especially good Scale modeler does own design parts fabrication book well worth price $1095 detailed listing items available Harry B Higley & Sons write PO Box 532 Glen166 Model Aviation specially formulated chemically balanced fuel top performance minimum engine wear weather condition CLEVGIANTS GIANT SCALE BUFFS ~ILAND Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS C-D QUALITY MASTER MODELS PLANS 77 Lecconthe Seden $25 gdPekker 57 Pt $3Pt 73 N Mtch Rorrrb $4 60 Heecord Pete Race $32 65 MMeracder 8-26 $42 ~-- 70 Boyle Ge-Bee $32 78 Soprnitfr Pep$24 bOS perocerine S6B $24 81 OH Moaqoito Sb $38 perrnorine S6B $32 108 OH MoqeBonrb $48 62 C Hoeck P6E $36 61 Corti. Robin 005 $16 94 C fleck P6E Ptt $54 88 Sleet PT17Koydet $48 kfc.4 Vego $24 99 NBIk Widorn P61 $65 92 flee ft Parl LNB-4 S28 71 DoegSC-3 Tran $29 74 Doo Ill. G-B 11 $39 93 DoegOC3 Tren $45 95 eooepe Sport $36 86 Hecb Tenoco 12 $32 858o Sprtelldog $39 108 Cer02U1/4 L&S $56 07 Aerence C-3 Spt $35 78 Arrn SptPer. A2 $3e 61 Soegle 038 Ob $24 60 Doeglo M-2 Moil $24 122 Doegle 0-38 Ok $49 68 Brittol Belideg FIr $30 94 Pege Cert Rocer $45 59 BrocotgeceMeLA $54 71 Merlin BlO Bonrb $29 107 Gino Boocct POP $54 7R Ternere WW Roc $35 73 Trenel Air 6000 $24 64 Cer GecIrk P1 1C2 $39 107 Mert MR-i Bern $44 94Cer GocIrk FI1C2 $54 91 Liodberg NO211 $39 66 Deflon Cornet Roc $24 61 AEG GIV LI Born $24 62 HecoMrMelligen $35 108 PoirchPT19 Tr $59 &.. 94 HocoMr Melligon $45 90 Wore Teper-Wing $39 63 Bornog P26A PIr $36 75 W6lId Lycender $32 e 84 Borneo P-26A PIt $48 ISO Weerid Lyconder $49 69 Waco C6 Cabin $36 57 Ford Trirnlr 4-AT $28 64 Beech C17-B Slog $38 76 Por4 Trirntr 4-AT $45 % 96 Beech Cl7-B Slog $492 114 Pard Trirnlr 4-AT $59 55 Leek 11 Electra $24 04 Bed-Joyce XPJ-2 $56 Lank 11 Electra $32 93 Loeniog C-2Arnph $69 63 Stincee 01W SRi $16 58 GrernJ2P Deck $39 en TIW 5R7 $24 78 GrernJ2P Deck $56 eon TIW SRi 532 59 Golha G1V Bern $22 el PIt P2-B $20 117 Gothe G1V Bern $39 ol Pt P2-B $32 68 Gong 0-46A Ok. $32 tel Pt P2-B $45 108 Sibot S-38 Arnph $49 Peece Spec $45 60 Bee ITO Sport $36 63 Skyrocket SPSP-1 $20 90 Bee 100 Sport $49 56Ccr Warfrk P40 $24 90 SlineALorn Wing $56 - 78 Lock Lighlng P38 $38 80 Merlin 74 T4M-1 $39 56 Rep SeeBee Am $24 75 HPge 0400 Bornb $30 SeeS Arnph $39 100 8-Pge 0400 Bern 549 er J3 Cek 039 65 MChine Clipper $50 Hedeen Sorb $38 97 MChina Clipper $69 rn P6F Hellcat 028 71 lecocen C2 Airlin $24 ng R-l7GFort$29 66 R5133 80 Jengrn $292 R-17G Fort 049 68 Bren-Winklo Bird $45 ri Whirecind 824 54 Cert Scoift XP934 $28 Nacion $29 63 Lindkerg ISirie $24 trance VTeil $39 55 HrnkrHicd PIrorn $32 INO KITS AVAILABLEIPrice cebject chonge ..pgq Olher Sceles Sice frern 6 Span Coorplele Pattern 25c Add 10% order far chipping & in. etc raUSA Coo & Moe Elcenchere add 15% 120% airl PrIe al catalog $1 50 Price lid dentin alone 55c *lby err foreign add $1 001* ~jrCLEYELAND MODEL& SUPPLY Co 103070 DeteejI AneClenaloed Ofia 44102 wood IL 60425 Back basics Bill Sketon Warrenton OR wrote asking What best place install belicrank leadouts biplane much outboard wing weight should used Bills question prompted fact has just ob tained kit Bucker Jungmeister has much previous biplane build ing experience placement bellcrank biplane much different other CL model should mounted onor slightly behindthe center gravity CG generally found front cockpit area biplanes build biplane CL kit would likely find plans showing bellcrank mounted CG area just de scribed1 point between top wing midpoint fuselage type installation requires cut holes fuselage skin leadouts addi tion leadouts must supported some point between fuselage wing tip usually done support mounted outer wing struts can seen accompanying photo Ed Robinsons Sopwith Camel arrangement poses no problem Sport Scale model no points awarded cockpit detail bad Scale modeler desires make Precision Scale model requires full cockpit detail Another approach bellcrank mounting biplane demonstrated Ron Sears PT-17 saw t83 Nats Ron mounted bellcrank leadout wires wholly within lower wing permitted full cockpit detail installed also did away need cutting holes fuselage having familiar leadout support mounted between wing struts placement bellcrank leadouts did make difference either models flying characteristics both great-flying planes other part Billts question much wing tip weight outboard wing According scale-biplaneflying friends amount weight used models about same other CL Scale planes model medium-sized 4-5 lb using 018 wire two three ounces used model large 6 lb 021 027 lines used three four ounces weight probably needed Northwest Regional Control Line Cham pionships will big doings Eu gene OR over 1984 Memorial Day weekend May 26 27 Eugene Prop Spinners Club cooperation other Northwest clubs individuals will hosting Northwest Regionals 84 CL contest two-day contest will have 25 events trophies through third place events addition $2000 worth mer chandise prizes will awarded special interest readers column clusion two Scale events Profile Pre YOUR GUARANTEED SATISFACTIONA Gccecc eALUE COMES WITh 80 GRIT CLOTh SANDING BELT THE SANDING BLOCK THAT WEARS BELl block made TOUGHLIGHTWEIGHT HIGH IMPACT STYRENE T EVER BREAKS WE WILL REPLACE IT FREE uses same size belt 3x18 electric hand sanders might ask WHY USE expensive belts instead cheapert sandpaper WHY BECAUSE BELT IS MORE DEPENDABLE DURABLE ECONOMICAL EASIER TO USE glueing tacking clamping sandpaper other type block Belt will slip wrinkle tear causing unwanted marks gouges finished work 1 RESIN BONDED BELT WILL GIVE YOU AT LESS COST MORE TROUBLE FREE SANDING THAN 10 SHEETS OF regular sandpaper sandpapersanding blocks can waste up 44% its sand paper just hold itself block BELT IS EASILY CHANGED IN SECONDS WITHOUT ANY DAMAGE AND SO BELT MAY BE SAVED AND USED ON MANY OTHER JOBS Since belt SO QUICKLY CHANGED pick right type grit size belt MAKE YOUR SANDING JOB EASIERSimple Use. PUSHSMALLENDOFWEDGETO THE RIGHT TO OPEN IT AND PUT THE BELT ON LEFT SIDE OF BLOCK SLIDING IT OVER TOP PART OF WEDGE CUSHION PAD ON BOTTOM GIVES SMOOTH FINISHING FOR LONGER BELT LIFE u2 SLIP THE SANDING BELT INTO PLACE AND SNAP THE WEDGE SHUT THAT IS ALL YOU DO HARD FLAT SURFACE ON TOP OF BLOCK FOR TRUE FLAT PRE CISION BUTT SANDING TO GET NEW CLEAN SANDING SURFACE AS NEEDED JUST LOOSEN WEDGE AND ROTATE BELT USE ALL 54 sq inches CHECK AT YOUR LOCAL HOBBY SHOP FOR WEDGE LOCK IF THEY DO NOT HAVE ONE ASK THEM TO GET SOME will send PREPAID 1 WEDGE LOCK BLOCK comes 80 grit cloth belt 3 EXTRA RESIN BONDED BELTS COST OF INTRO DUCTORY OFFER JUST $1000 Please fill Out coupon circle 3 belts want coupon mailing label IF YOU HAVE BLOCK AND JUST WANT BELTS WE WILL SEND YOU 6 BELTS FOR just $1000 ASK YOUR HOBBY SHOP TO CARRY BELTS Blech $800Resin 000404 BRIIO $200 egPostage & Nottdllng $200 $1000COUPON SPECIAL$1000 BELTS ALUMINUM OXIDESILCON CARBIDE 80-100-120-150-180-220220-280-360-400 FROM ART GROSS ENTERPRISES206 743-9332 12516 MAPLEWOOD AVE EDMONDS WA 98020 TO June 1984 167 Box 1063 Lorain Ohio 44055 Ph 216282-8354 Peanut Scale Models P1W Vqabmi J Piper Cob SlIm 125 Outdoor kIte inch. 3495 LIght Indoor kits mach. 3495 Sport Scale Models 22 Span PC-S Porter Taylor Cr10 Slloson Voyager Rubber CO2 Power Kilo ach. 3695 An Embryo Model willi ise Span dosigned wiol boginoers ~rt$. 3695 HARD-TO-FIND ITEMS FOR YOUR BUILDING NEEDS Early Bird TISsue f Dr Antique Aircraft 3595 True Olde Japanese Tissue 10 3 colors 95 Japanese Tissue 12 6 colors 3395 MiCrolite Plain3325 Silver3395 Microfilm Glue 3160Solvent 3125 Condenser Paper 3 sheets3375 Plan Service over 17 Scale Sport Scale & Peanot Scale Rubber Strip 020 thru 085each 3175 3/32 tfiro 5/32each 3195 Winder 61 395 Mark 1161 195 Complete Line Brown CO2 Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage mom Postage 3150 COMPLETE CATALOG 3150 Smithsonians Air Space Museum just pleasant walk So nearly everything else come Washington see modest rates give soft landing heart downtown Free over night parking Goad food reasonable prices Cafeteria Sandwich Shop Cocktail Lounge cision Scale Other major event categories Combat PAMPA Stunt Navy Carrier Speed Racing contest will held Mahlon Sweet Airport model flying site has asphalt four grass circles site also has bleachers PA system drinking foun tain spectator control fencing addi tion great flying site conditions will camping space concession truck hobby shop various model-related displays Lodging said available within few minutes drive flying field Saturday night May 26 Seattle Skyraiders Flying Lines newsletter will host Pot Luck Party field Sounds like will great contest full details contestand especially local rules Profile Scale eventwrite John Thompson 1411 Bryant Avenue Cottage Grove OR 97424 Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Racing/Ballard Continued page 72 because have capable pilot close can count being available contests recall made straw poll Nats about possibility 21-size engines being specified Rat some little reluctant personal mostly big-dollar investments reasons recognized need would like ask RAC support fol lowing changes incorporated new supplemental event 1986-87 complete replacement 1988-89 new event would bring forward existing Rat rules except limiting maximum engine size 35cc 2135 cu Additional topics might need addressed individually would Single room $32 up Family room $46 up Ask about 10% dIscount AMA members 8004248532 k11 fiec HOTEL HARRUTON 11th & E Sts NW Washington DC 20004 1 Line size suggest keeping lines 018 solids two primary reasons strength safety increase drag di minish ultimate top speed reasoning takes following path First piano wire specified AMA rule book avaialble competitors stainless steel stainless steel less liable corrosion rust piano wire its strength least kinds wire avail able modeler range 80% piano wire current Rats unsafe 018 stainless However 21 Rat would quite safe using lines Second ul timate performance Racing model greatly governed horsepower avail able drag model system can use current Scale Racing supply data poiht good Scale Racer SR will run mid 14s seconds using 15 cu engine 60 ft 014 solid lines horse power nominally equivalent dis placement 21 same model would yield 14 times much horsepowerwhich would result speed increase about cube root 14or about 12% SR goes 125 mph 140 mph result Now up line size 014 018 drag lines will increse 28% linearly diameter order maintain same speed will need over twice horsepower 128 cubed Alternatively same horsepower speed will drop until drag previous level about 13% square root 128 140 mph SR back about 123 mph Now assume model streamlined SR get back about 130 mph estimation 2 possible low-nitro supplied-fuel rule should incorporated suggest use same formula now Slow Rat rules However suspect will want leave Rat un limited event existing proposed limitations Slow Rat would like pass fol lowing two questions the RAC 1 What future Slow Rat 2 What should about future course would suspect have own answers questions would like present believe future Slow Rat very dim events original purpose provide event could gotten larger portion CL modelers Rat since Rat mid-Seventies people could handle tried structure event provide official AMA Racing alternative performance-level obtainable capable being flown lesser skills required Rat original proposal disallowed Schneurle-ported enginesa proposal never made initial set rules What has happened history performance curve has made Slow Rat another event unreachable except two capable pilots disposal changes year will helpthe 10% fuel will temporarily slow event back lower speed foresee fairly rapid return performance levels near beforeagain unreachable less-than-great Slow Rat decaying contestant involvement just previous events have allowed reach too high performance level believe something needs done Slow Rat salvaged have several suggestions youve seen before would like RAC think long hard maybe support 1 Engine availability performance levels must addressed no com petitive 35s available market today K&B 58s nonexistent Tune 36/OS 36 no longer available propose choose engine class provides large choice compatible engines such class Quicky 500 engines RC boys use front intake single-bypass-port 40s several different brands competitive being Como K&B HB available good hobby shop can purchased discount magazine advertisement en gine class along 10% nitro limi tation would wise choice Anther class consider might 35cc engines described above Fast Rat Again would have significant decrease ultimate horsepower significant increase availability 2 Plane configuration typical Slow Rat 300 sq wing area difficult build other types models used competitive flying ever lot work put together might consider canges much simpler modebut corresponding decrease horsepower made Quickie Rat design use area proContinued page 170 168 Model Aviation FROM HOTEL HARRINGTON WASHINGTON IS JUST SHORT GLIDE
Edition: Model Aviation - 1984/06
Page Numbers: 71, 166, 167, 168
SHOWTIMEWhile column sched uled publication June 1984 issue MA being written month Feb mary time year Northeast Westchester Radio Aeromodelers Inc WRAMS hold 16th Annual Radio Control Show Westchester County Center White Plains NY show well others held around country advertised RC shows generally include pro motion Control Line other aero modeling categories However should way stop CL other model ers attending RC manufacturers will have sorts items display can used modelers Some come mind fuel tubing control horns model cover ings modeling tools retracting gear units props new lines engines particularly enjoy visiting booths picking up latest catalogs con cessioneer has offer slight cost involved catalogs come handy during year part product reference library shows also give opportunity review old see whats new RC Scale models might well suited CL use As usual Top Flite advertising seven WW II 60-in Stand-Off Scale planes such good flying models Royal Products also hand information wide range Precision Stand-Off Scale kits Royal kits range size 32-in Pitts S-2A 84-in Douglas C-47 excel lent flying models majority kits balsa use built-up construction makes easy conversion RC CL models See December 1982 issue MA RC-to-CL conversion article also liked F7F Tigercat RC Kits 706 Easton NE No Canton OH 44721 F7F has wingspan 72 weighs about 12 lb looks like could good Stand-Off Scale Sport Scale CL proj ect Two other models thought would make good Control Line Scale projects though theyre little large82-in wingspans TBF-l Avenger Mikoyan-Gurevich MIG-3 Avenger said weigh about 11 lb MIG-3 nine-lb range engines 60 90 size recommended Both models avaialble Bob Dively Model Aircraft Inc 28001 Chagrin Blvd Suite 206 Woodmere OH 44122 must stop WRAMS show Harry Higleys booth say Hello look over great assortment special ized model tools addition widelyknown tubing- wire-benders long wheel-collar wrenches special heavy light custom prop nuts Harry very good selection generally-hard-tofind taps dies taps dies ranged sizes small 2-56 -32 standard glow plug thread size Harry has just added carbide-tipped scriber new book called Master Modeling product line scriber has solid car bide point set blue-anodized aluminum handle Master Modeling book follows same easy-to-understand format used Continued page 166 two biplanes show different approaches handling problem belicrank mounting leadout wires type plane Ron Sears Pontiac Ml Nats-winning PT-17 Stearman L mounted beiicrank iower wing ran leadouts through wing out tipjust like monopiane CL models Ed Robinsons Hastings NY Sopwith Camel R has bellcrank mounted up fuseisge leadouts run out through side fuse through guide attached wings interpiane struts Bill has good discussion topic column Ron chose internal system Precision Scaie model could have cockpit detail two RC Scale models Bill saw recent WRAMS expo lie thinks good subjects conversion CL Sport Scale both feature large cowlings would allow large engines completely enclosed plane left Grumman TBF-1 Avenger WW II torpedo bomber Bob Dively Model Aircraft Inc right Grumman F7F Tlgercat RC Kits discussion column June 1984 71 THIS FUEL FEATURES ORUST PREVENTION AGENTS ODETERGENTS SLUBRICAllON WITH HIGH FLASH POINTS WETTING AGENTS FOR MORE EFFICIENT AND DEPENDABLE FUEL FLOW eANTI-FOAMING AGENTS TO PREVENT LEAN RUNS KEEPS YOUR ENGINE RUNNING COOL OAN ODORLESS HIGHLY REFINED FUEL CHILDPROOF LIDS Available FAI 5 10 15 25 & 40% Nitro-Methane Contents Formulated synthetic lubricants Also cNailade castor DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT This competition fuel fast becoming THE CHOICE vMh top protesionals first cash product Contact us price structures ordering information Manufacturers Major Brand Distributors Model Engines Kits Rodos Accessories SUPER K Fuels brand KINGS RADIO CONTROL HOBBIES INTERNATIONAL 3960 West 16 Ave HIalech Florida 33012 305 557-2024 can made example need firewall positioned 30 downthrust relative centerline fuselage will need set pointer 30 draw lines along pointer wire top gauge along top gauge pointer wire outward template can cut along two lines used guide mounting firewall Several other variations theme possible course depending upon imagination specific needs Hope fully small implements wiH help become accurate consequently bet ter builder model aircraft really what aboutmost time anyway CL Aerobatics/Fancher Continued page 70 speed weight line length diameter air density etc nonetheless true total affect will negligible remotely normal Stunt ship plane properly trimmed leadouts will exit wingtip point three degrees aft center gravity have just located bellcrank pivot plus minus less degree point spar should located tip rib Allow small amount fore aft adjustability pointbut Im willing bet youll end up both leadouts within / inch plotted location Now just draw wing tip choice construction details feel appropriate lets get fun stuffthe fuselage fuselage fun because best place let creativity run rampant Aside locating important pieces right places body like Spinners rudders cowls canopies grist creative mill Lest get carried away however start plotting following convenient horizontal refer ence line usually use top main fuse side spinner backplate 2 Wing leading edge 3 CG 4 Flap hinge line 5 Wing flap trailing edge 6 Stab leading edge 7 Elevator hinge line 8 Elevator trailing edge vertical reference line plot fol lowing locations Engine thrust line 2 Wing centerline Another hint Try keep thrust line wing centerline within 50% wing thickness other Since wing will primary source drag having large distance thrust line will create substantial pitch trim problems 3 Stab centerline 4 Wheel/ground contact point located vertically allow adequate ground clearance largest prop plan use horizontally located respect center gravity Now draw wing stab cutouts let yourself go Just remember anything draw youre going have figure way build reasonable weight last major component top fuselage stab/elevator ease drawing save room usually half top view shown Critical measure ments limited width should dictated size engine crankcase Measure let fuselage grow naturally ie crankcase plus two engine mounts plus two doublers plus two fuse sides equals fuse thickness Firewalls formers simply plotted top bottom views located tween wirtg fuse top view respective longitudinal location right half stab elevator drawn part top view now down nitty gritty detailed want completed drawing drawing planned publication will want letter using lettering guide also put some caption material such models name designers name critical dimensions etc Consider using Letraset dry transfer lettering captions gives very professional lookand besides gives something old Letraset sheets drying up drawer under jockey shorts Include explanatory notes design items may easily illustrated plan such wing asymmetry wood types grades manufacturers names commercial items recom mend Last least have nerve original ink design pub lished inked drawing worth much additional $100 pocket hope has proved helpful Perhaps another time can spend some time dis cussing what numbers data sheet should really can design way top better mousetrap especially tailored particular talents After thats what makes Stunt greatest modeling events really way skin cat Fly Stunt Ted Fancher 158 Flying Cloud Isle Fos ter City CA 94409 CL Scale/Boss Continued page 71 Harrys two previous books No Secrets Handbook Miniature En gines new book loaded how-to-do pictures written descrip tions covering topics such scaling up three-views layout building wings fuselages very well-detailed structions anyone wanting make model parts fiberglass book has something beginner well experienced modeler especially good Scale modeler does own design parts fabrication book well worth price $1095 detailed listing items available Harry B Higley & Sons write PO Box 532 Glen166 Model Aviation specially formulated chemically balanced fuel top performance minimum engine wear weather condition CLEVGIANTS GIANT SCALE BUFFS ~ILAND Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS C-D QUALITY MASTER MODELS PLANS 77 Lecconthe Seden $25 gdPekker 57 Pt $3Pt 73 N Mtch Rorrrb $4 60 Heecord Pete Race $32 65 MMeracder 8-26 $42 ~-- 70 Boyle Ge-Bee $32 78 Soprnitfr Pep$24 bOS perocerine S6B $24 81 OH Moaqoito Sb $38 perrnorine S6B $32 108 OH MoqeBonrb $48 62 C Hoeck P6E $36 61 Corti. Robin 005 $16 94 C fleck P6E Ptt $54 88 Sleet PT17Koydet $48 kfc.4 Vego $24 99 NBIk Widorn P61 $65 92 flee ft Parl LNB-4 S28 71 DoegSC-3 Tran $29 74 Doo Ill. G-B 11 $39 93 DoegOC3 Tren $45 95 eooepe Sport $36 86 Hecb Tenoco 12 $32 858o Sprtelldog $39 108 Cer02U1/4 L&S $56 07 Aerence C-3 Spt $35 78 Arrn SptPer. A2 $3e 61 Soegle 038 Ob $24 60 Doeglo M-2 Moil $24 122 Doegle 0-38 Ok $49 68 Brittol Belideg FIr $30 94 Pege Cert Rocer $45 59 BrocotgeceMeLA $54 71 Merlin BlO Bonrb $29 107 Gino Boocct POP $54 7R Ternere WW Roc $35 73 Trenel Air 6000 $24 64 Cer GecIrk P1 1C2 $39 107 Mert MR-i Bern $44 94Cer GocIrk FI1C2 $54 91 Liodberg NO211 $39 66 Deflon Cornet Roc $24 61 AEG GIV LI Born $24 62 HecoMrMelligen $35 108 PoirchPT19 Tr $59 &.. 94 HocoMr Melligon $45 90 Wore Teper-Wing $39 63 Bornog P26A PIr $36 75 W6lId Lycender $32 e 84 Borneo P-26A PIt $48 ISO Weerid Lyconder $49 69 Waco C6 Cabin $36 57 Ford Trirnlr 4-AT $28 64 Beech C17-B Slog $38 76 Por4 Trirntr 4-AT $45 % 96 Beech Cl7-B Slog $492 114 Pard Trirnlr 4-AT $59 55 Leek 11 Electra $24 04 Bed-Joyce XPJ-2 $56 Lank 11 Electra $32 93 Loeniog C-2Arnph $69 63 Stincee 01W SRi $16 58 GrernJ2P Deck $39 en TIW 5R7 $24 78 GrernJ2P Deck $56 eon TIW SRi 532 59 Golha G1V Bern $22 el PIt P2-B $20 117 Gothe G1V Bern $39 ol Pt P2-B $32 68 Gong 0-46A Ok. $32 tel Pt P2-B $45 108 Sibot S-38 Arnph $49 Peece Spec $45 60 Bee ITO Sport $36 63 Skyrocket SPSP-1 $20 90 Bee 100 Sport $49 56Ccr Warfrk P40 $24 90 SlineALorn Wing $56 - 78 Lock Lighlng P38 $38 80 Merlin 74 T4M-1 $39 56 Rep SeeBee Am $24 75 HPge 0400 Bornb $30 SeeS Arnph $39 100 8-Pge 0400 Bern 549 er J3 Cek 039 65 MChine Clipper $50 Hedeen Sorb $38 97 MChina Clipper $69 rn P6F Hellcat 028 71 lecocen C2 Airlin $24 ng R-l7GFort$29 66 R5133 80 Jengrn $292 R-17G Fort 049 68 Bren-Winklo Bird $45 ri Whirecind 824 54 Cert Scoift XP934 $28 Nacion $29 63 Lindkerg ISirie $24 trance VTeil $39 55 HrnkrHicd PIrorn $32 INO KITS AVAILABLEIPrice cebject chonge ..pgq Olher Sceles Sice frern 6 Span Coorplele Pattern 25c Add 10% order far chipping & in. etc raUSA Coo & Moe Elcenchere add 15% 120% airl PrIe al catalog $1 50 Price lid dentin alone 55c *lby err foreign add $1 001* ~jrCLEYELAND MODEL& SUPPLY Co 103070 DeteejI AneClenaloed Ofia 44102 wood IL 60425 Back basics Bill Sketon Warrenton OR wrote asking What best place install belicrank leadouts biplane much outboard wing weight should used Bills question prompted fact has just ob tained kit Bucker Jungmeister has much previous biplane build ing experience placement bellcrank biplane much different other CL model should mounted onor slightly behindthe center gravity CG generally found front cockpit area biplanes build biplane CL kit would likely find plans showing bellcrank mounted CG area just de scribed1 point between top wing midpoint fuselage type installation requires cut holes fuselage skin leadouts addi tion leadouts must supported some point between fuselage wing tip usually done support mounted outer wing struts can seen accompanying photo Ed Robinsons Sopwith Camel arrangement poses no problem Sport Scale model no points awarded cockpit detail bad Scale modeler desires make Precision Scale model requires full cockpit detail Another approach bellcrank mounting biplane demonstrated Ron Sears PT-17 saw t83 Nats Ron mounted bellcrank leadout wires wholly within lower wing permitted full cockpit detail installed also did away need cutting holes fuselage having familiar leadout support mounted between wing struts placement bellcrank leadouts did make difference either models flying characteristics both great-flying planes other part Billts question much wing tip weight outboard wing According scale-biplaneflying friends amount weight used models about same other CL Scale planes model medium-sized 4-5 lb using 018 wire two three ounces used model large 6 lb 021 027 lines used three four ounces weight probably needed Northwest Regional Control Line Cham pionships will big doings Eu gene OR over 1984 Memorial Day weekend May 26 27 Eugene Prop Spinners Club cooperation other Northwest clubs individuals will hosting Northwest Regionals 84 CL contest two-day contest will have 25 events trophies through third place events addition $2000 worth mer chandise prizes will awarded special interest readers column clusion two Scale events Profile Pre YOUR GUARANTEED SATISFACTIONA Gccecc eALUE COMES WITh 80 GRIT CLOTh SANDING BELT THE SANDING BLOCK THAT WEARS BELl block made TOUGHLIGHTWEIGHT HIGH IMPACT STYRENE T EVER BREAKS WE WILL REPLACE IT FREE uses same size belt 3x18 electric hand sanders might ask WHY USE expensive belts instead cheapert sandpaper WHY BECAUSE BELT IS MORE DEPENDABLE DURABLE ECONOMICAL EASIER TO USE glueing tacking clamping sandpaper other type block Belt will slip wrinkle tear causing unwanted marks gouges finished work 1 RESIN BONDED BELT WILL GIVE YOU AT LESS COST MORE TROUBLE FREE SANDING THAN 10 SHEETS OF regular sandpaper sandpapersanding blocks can waste up 44% its sand paper just hold itself block BELT IS EASILY CHANGED IN SECONDS WITHOUT ANY DAMAGE AND SO BELT MAY BE SAVED AND USED ON MANY OTHER JOBS Since belt SO QUICKLY CHANGED pick right type grit size belt MAKE YOUR SANDING JOB EASIERSimple Use. PUSHSMALLENDOFWEDGETO THE RIGHT TO OPEN IT AND PUT THE BELT ON LEFT SIDE OF BLOCK SLIDING IT OVER TOP PART OF WEDGE CUSHION PAD ON BOTTOM GIVES SMOOTH FINISHING FOR LONGER BELT LIFE u2 SLIP THE SANDING BELT INTO PLACE AND SNAP THE WEDGE SHUT THAT IS ALL YOU DO HARD FLAT SURFACE ON TOP OF BLOCK FOR TRUE FLAT PRE CISION BUTT SANDING TO GET NEW CLEAN SANDING SURFACE AS NEEDED JUST LOOSEN WEDGE AND ROTATE BELT USE ALL 54 sq inches CHECK AT YOUR LOCAL HOBBY SHOP FOR WEDGE LOCK IF THEY DO NOT HAVE ONE ASK THEM TO GET SOME will send PREPAID 1 WEDGE LOCK BLOCK comes 80 grit cloth belt 3 EXTRA RESIN BONDED BELTS COST OF INTRO DUCTORY OFFER JUST $1000 Please fill Out coupon circle 3 belts want coupon mailing label IF YOU HAVE BLOCK AND JUST WANT BELTS WE WILL SEND YOU 6 BELTS FOR just $1000 ASK YOUR HOBBY SHOP TO CARRY BELTS Blech $800Resin 000404 BRIIO $200 egPostage & Nottdllng $200 $1000COUPON SPECIAL$1000 BELTS ALUMINUM OXIDESILCON CARBIDE 80-100-120-150-180-220220-280-360-400 FROM ART GROSS ENTERPRISES206 743-9332 12516 MAPLEWOOD AVE EDMONDS WA 98020 TO June 1984 167 Box 1063 Lorain Ohio 44055 Ph 216282-8354 Peanut Scale Models P1W Vqabmi J Piper Cob SlIm 125 Outdoor kIte inch. 3495 LIght Indoor kits mach. 3495 Sport Scale Models 22 Span PC-S Porter Taylor Cr10 Slloson Voyager Rubber CO2 Power Kilo ach. 3695 An Embryo Model willi ise Span dosigned wiol boginoers ~rt$. 3695 HARD-TO-FIND ITEMS FOR YOUR BUILDING NEEDS Early Bird TISsue f Dr Antique Aircraft 3595 True Olde Japanese Tissue 10 3 colors 95 Japanese Tissue 12 6 colors 3395 MiCrolite Plain3325 Silver3395 Microfilm Glue 3160Solvent 3125 Condenser Paper 3 sheets3375 Plan Service over 17 Scale Sport Scale & Peanot Scale Rubber Strip 020 thru 085each 3175 3/32 tfiro 5/32each 3195 Winder 61 395 Mark 1161 195 Complete Line Brown CO2 Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage mom Postage 3150 COMPLETE CATALOG 3150 Smithsonians Air Space Museum just pleasant walk So nearly everything else come Washington see modest rates give soft landing heart downtown Free over night parking Goad food reasonable prices Cafeteria Sandwich Shop Cocktail Lounge cision Scale Other major event categories Combat PAMPA Stunt Navy Carrier Speed Racing contest will held Mahlon Sweet Airport model flying site has asphalt four grass circles site also has bleachers PA system drinking foun tain spectator control fencing addi tion great flying site conditions will camping space concession truck hobby shop various model-related displays Lodging said available within few minutes drive flying field Saturday night May 26 Seattle Skyraiders Flying Lines newsletter will host Pot Luck Party field Sounds like will great contest full details contestand especially local rules Profile Scale eventwrite John Thompson 1411 Bryant Avenue Cottage Grove OR 97424 Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Racing/Ballard Continued page 72 because have capable pilot close can count being available contests recall made straw poll Nats about possibility 21-size engines being specified Rat some little reluctant personal mostly big-dollar investments reasons recognized need would like ask RAC support fol lowing changes incorporated new supplemental event 1986-87 complete replacement 1988-89 new event would bring forward existing Rat rules except limiting maximum engine size 35cc 2135 cu Additional topics might need addressed individually would Single room $32 up Family room $46 up Ask about 10% dIscount AMA members 8004248532 k11 fiec HOTEL HARRUTON 11th & E Sts NW Washington DC 20004 1 Line size suggest keeping lines 018 solids two primary reasons strength safety increase drag di minish ultimate top speed reasoning takes following path First piano wire specified AMA rule book avaialble competitors stainless steel stainless steel less liable corrosion rust piano wire its strength least kinds wire avail able modeler range 80% piano wire current Rats unsafe 018 stainless However 21 Rat would quite safe using lines Second ul timate performance Racing model greatly governed horsepower avail able drag model system can use current Scale Racing supply data poiht good Scale Racer SR will run mid 14s seconds using 15 cu engine 60 ft 014 solid lines horse power nominally equivalent dis placement 21 same model would yield 14 times much horsepowerwhich would result speed increase about cube root 14or about 12% SR goes 125 mph 140 mph result Now up line size 014 018 drag lines will increse 28% linearly diameter order maintain same speed will need over twice horsepower 128 cubed Alternatively same horsepower speed will drop until drag previous level about 13% square root 128 140 mph SR back about 123 mph Now assume model streamlined SR get back about 130 mph estimation 2 possible low-nitro supplied-fuel rule should incorporated suggest use same formula now Slow Rat rules However suspect will want leave Rat un limited event existing proposed limitations Slow Rat would like pass fol lowing two questions the RAC 1 What future Slow Rat 2 What should about future course would suspect have own answers questions would like present believe future Slow Rat very dim events original purpose provide event could gotten larger portion CL modelers Rat since Rat mid-Seventies people could handle tried structure event provide official AMA Racing alternative performance-level obtainable capable being flown lesser skills required Rat original proposal disallowed Schneurle-ported enginesa proposal never made initial set rules What has happened history performance curve has made Slow Rat another event unreachable except two capable pilots disposal changes year will helpthe 10% fuel will temporarily slow event back lower speed foresee fairly rapid return performance levels near beforeagain unreachable less-than-great Slow Rat decaying contestant involvement just previous events have allowed reach too high performance level believe something needs done Slow Rat salvaged have several suggestions youve seen before would like RAC think long hard maybe support 1 Engine availability performance levels must addressed no com petitive 35s available market today K&B 58s nonexistent Tune 36/OS 36 no longer available propose choose engine class provides large choice compatible engines such class Quicky 500 engines RC boys use front intake single-bypass-port 40s several different brands competitive being Como K&B HB available good hobby shop can purchased discount magazine advertisement en gine class along 10% nitro limi tation would wise choice Anther class consider might 35cc engines described above Fast Rat Again would have significant decrease ultimate horsepower significant increase availability 2 Plane configuration typical Slow Rat 300 sq wing area difficult build other types models used competitive flying ever lot work put together might consider canges much simpler modebut corresponding decrease horsepower made Quickie Rat design use area proContinued page 170 168 Model Aviation FROM HOTEL HARRINGTON WASHINGTON IS JUST SHORT GLIDE
Edition: Model Aviation - 1984/06
Page Numbers: 71, 166, 167, 168
SHOWTIMEWhile column sched uled publication June 1984 issue MA being written month Feb mary time year Northeast Westchester Radio Aeromodelers Inc WRAMS hold 16th Annual Radio Control Show Westchester County Center White Plains NY show well others held around country advertised RC shows generally include pro motion Control Line other aero modeling categories However should way stop CL other model ers attending RC manufacturers will have sorts items display can used modelers Some come mind fuel tubing control horns model cover ings modeling tools retracting gear units props new lines engines particularly enjoy visiting booths picking up latest catalogs con cessioneer has offer slight cost involved catalogs come handy during year part product reference library shows also give opportunity review old see whats new RC Scale models might well suited CL use As usual Top Flite advertising seven WW II 60-in Stand-Off Scale planes such good flying models Royal Products also hand information wide range Precision Stand-Off Scale kits Royal kits range size 32-in Pitts S-2A 84-in Douglas C-47 excel lent flying models majority kits balsa use built-up construction makes easy conversion RC CL models See December 1982 issue MA RC-to-CL conversion article also liked F7F Tigercat RC Kits 706 Easton NE No Canton OH 44721 F7F has wingspan 72 weighs about 12 lb looks like could good Stand-Off Scale Sport Scale CL proj ect Two other models thought would make good Control Line Scale projects though theyre little large82-in wingspans TBF-l Avenger Mikoyan-Gurevich MIG-3 Avenger said weigh about 11 lb MIG-3 nine-lb range engines 60 90 size recommended Both models avaialble Bob Dively Model Aircraft Inc 28001 Chagrin Blvd Suite 206 Woodmere OH 44122 must stop WRAMS show Harry Higleys booth say Hello look over great assortment special ized model tools addition widelyknown tubing- wire-benders long wheel-collar wrenches special heavy light custom prop nuts Harry very good selection generally-hard-tofind taps dies taps dies ranged sizes small 2-56 -32 standard glow plug thread size Harry has just added carbide-tipped scriber new book called Master Modeling product line scriber has solid car bide point set blue-anodized aluminum handle Master Modeling book follows same easy-to-understand format used Continued page 166 two biplanes show different approaches handling problem belicrank mounting leadout wires type plane Ron Sears Pontiac Ml Nats-winning PT-17 Stearman L mounted beiicrank iower wing ran leadouts through wing out tipjust like monopiane CL models Ed Robinsons Hastings NY Sopwith Camel R has bellcrank mounted up fuseisge leadouts run out through side fuse through guide attached wings interpiane struts Bill has good discussion topic column Ron chose internal system Precision Scaie model could have cockpit detail two RC Scale models Bill saw recent WRAMS expo lie thinks good subjects conversion CL Sport Scale both feature large cowlings would allow large engines completely enclosed plane left Grumman TBF-1 Avenger WW II torpedo bomber Bob Dively Model Aircraft Inc right Grumman F7F Tlgercat RC Kits discussion column June 1984 71 THIS FUEL FEATURES ORUST PREVENTION AGENTS ODETERGENTS SLUBRICAllON WITH HIGH FLASH POINTS WETTING AGENTS FOR MORE EFFICIENT AND DEPENDABLE FUEL FLOW eANTI-FOAMING AGENTS TO PREVENT LEAN RUNS KEEPS YOUR ENGINE RUNNING COOL OAN ODORLESS HIGHLY REFINED FUEL CHILDPROOF LIDS Available FAI 5 10 15 25 & 40% Nitro-Methane Contents Formulated synthetic lubricants Also cNailade castor DEALERS WANTED DOMESTIC & OVERSEAS WE EXPORT This competition fuel fast becoming THE CHOICE vMh top protesionals first cash product Contact us price structures ordering information Manufacturers Major Brand Distributors Model Engines Kits Rodos Accessories SUPER K Fuels brand KINGS RADIO CONTROL HOBBIES INTERNATIONAL 3960 West 16 Ave HIalech Florida 33012 305 557-2024 can made example need firewall positioned 30 downthrust relative centerline fuselage will need set pointer 30 draw lines along pointer wire top gauge along top gauge pointer wire outward template can cut along two lines used guide mounting firewall Several other variations theme possible course depending upon imagination specific needs Hope fully small implements wiH help become accurate consequently bet ter builder model aircraft really what aboutmost time anyway CL Aerobatics/Fancher Continued page 70 speed weight line length diameter air density etc nonetheless true total affect will negligible remotely normal Stunt ship plane properly trimmed leadouts will exit wingtip point three degrees aft center gravity have just located bellcrank pivot plus minus less degree point spar should located tip rib Allow small amount fore aft adjustability pointbut Im willing bet youll end up both leadouts within / inch plotted location Now just draw wing tip choice construction details feel appropriate lets get fun stuffthe fuselage fuselage fun because best place let creativity run rampant Aside locating important pieces right places body like Spinners rudders cowls canopies grist creative mill Lest get carried away however start plotting following convenient horizontal refer ence line usually use top main fuse side spinner backplate 2 Wing leading edge 3 CG 4 Flap hinge line 5 Wing flap trailing edge 6 Stab leading edge 7 Elevator hinge line 8 Elevator trailing edge vertical reference line plot fol lowing locations Engine thrust line 2 Wing centerline Another hint Try keep thrust line wing centerline within 50% wing thickness other Since wing will primary source drag having large distance thrust line will create substantial pitch trim problems 3 Stab centerline 4 Wheel/ground contact point located vertically allow adequate ground clearance largest prop plan use horizontally located respect center gravity Now draw wing stab cutouts let yourself go Just remember anything draw youre going have figure way build reasonable weight last major component top fuselage stab/elevator ease drawing save room usually half top view shown Critical measure ments limited width should dictated size engine crankcase Measure let fuselage grow naturally ie crankcase plus two engine mounts plus two doublers plus two fuse sides equals fuse thickness Firewalls formers simply plotted top bottom views located tween wirtg fuse top view respective longitudinal location right half stab elevator drawn part top view now down nitty gritty detailed want completed drawing drawing planned publication will want letter using lettering guide also put some caption material such models name designers name critical dimensions etc Consider using Letraset dry transfer lettering captions gives very professional lookand besides gives something old Letraset sheets drying up drawer under jockey shorts Include explanatory notes design items may easily illustrated plan such wing asymmetry wood types grades manufacturers names commercial items recom mend Last least have nerve original ink design pub lished inked drawing worth much additional $100 pocket hope has proved helpful Perhaps another time can spend some time dis cussing what numbers data sheet should really can design way top better mousetrap especially tailored particular talents After thats what makes Stunt greatest modeling events really way skin cat Fly Stunt Ted Fancher 158 Flying Cloud Isle Fos ter City CA 94409 CL Scale/Boss Continued page 71 Harrys two previous books No Secrets Handbook Miniature En gines new book loaded how-to-do pictures written descrip tions covering topics such scaling up three-views layout building wings fuselages very well-detailed structions anyone wanting make model parts fiberglass book has something beginner well experienced modeler especially good Scale modeler does own design parts fabrication book well worth price $1095 detailed listing items available Harry B Higley & Sons write PO Box 532 Glen166 Model Aviation specially formulated chemically balanced fuel top performance minimum engine wear weather condition CLEVGIANTS GIANT SCALE BUFFS ~ILAND Worlds Largest Gas Plans Assortment INTERNATIONALLY FAMOUS C-D QUALITY MASTER MODELS PLANS 77 Lecconthe Seden $25 gdPekker 57 Pt $3Pt 73 N Mtch Rorrrb $4 60 Heecord Pete Race $32 65 MMeracder 8-26 $42 ~-- 70 Boyle Ge-Bee $32 78 Soprnitfr Pep$24 bOS perocerine S6B $24 81 OH Moaqoito Sb $38 perrnorine S6B $32 108 OH MoqeBonrb $48 62 C Hoeck P6E $36 61 Corti. Robin 005 $16 94 C fleck P6E Ptt $54 88 Sleet PT17Koydet $48 kfc.4 Vego $24 99 NBIk Widorn P61 $65 92 flee ft Parl LNB-4 S28 71 DoegSC-3 Tran $29 74 Doo Ill. G-B 11 $39 93 DoegOC3 Tren $45 95 eooepe Sport $36 86 Hecb Tenoco 12 $32 858o Sprtelldog $39 108 Cer02U1/4 L&S $56 07 Aerence C-3 Spt $35 78 Arrn SptPer. A2 $3e 61 Soegle 038 Ob $24 60 Doeglo M-2 Moil $24 122 Doegle 0-38 Ok $49 68 Brittol Belideg FIr $30 94 Pege Cert Rocer $45 59 BrocotgeceMeLA $54 71 Merlin BlO Bonrb $29 107 Gino Boocct POP $54 7R Ternere WW Roc $35 73 Trenel Air 6000 $24 64 Cer GecIrk P1 1C2 $39 107 Mert MR-i Bern $44 94Cer GocIrk FI1C2 $54 91 Liodberg NO211 $39 66 Deflon Cornet Roc $24 61 AEG GIV LI Born $24 62 HecoMrMelligen $35 108 PoirchPT19 Tr $59 &.. 94 HocoMr Melligon $45 90 Wore Teper-Wing $39 63 Bornog P26A PIr $36 75 W6lId Lycender $32 e 84 Borneo P-26A PIt $48 ISO Weerid Lyconder $49 69 Waco C6 Cabin $36 57 Ford Trirnlr 4-AT $28 64 Beech C17-B Slog $38 76 Por4 Trirntr 4-AT $45 % 96 Beech Cl7-B Slog $492 114 Pard Trirnlr 4-AT $59 55 Leek 11 Electra $24 04 Bed-Joyce XPJ-2 $56 Lank 11 Electra $32 93 Loeniog C-2Arnph $69 63 Stincee 01W SRi $16 58 GrernJ2P Deck $39 en TIW 5R7 $24 78 GrernJ2P Deck $56 eon TIW SRi 532 59 Golha G1V Bern $22 el PIt P2-B $20 117 Gothe G1V Bern $39 ol Pt P2-B $32 68 Gong 0-46A Ok. $32 tel Pt P2-B $45 108 Sibot S-38 Arnph $49 Peece Spec $45 60 Bee ITO Sport $36 63 Skyrocket SPSP-1 $20 90 Bee 100 Sport $49 56Ccr Warfrk P40 $24 90 SlineALorn Wing $56 - 78 Lock Lighlng P38 $38 80 Merlin 74 T4M-1 $39 56 Rep SeeBee Am $24 75 HPge 0400 Bornb $30 SeeS Arnph $39 100 8-Pge 0400 Bern 549 er J3 Cek 039 65 MChine Clipper $50 Hedeen Sorb $38 97 MChina Clipper $69 rn P6F Hellcat 028 71 lecocen C2 Airlin $24 ng R-l7GFort$29 66 R5133 80 Jengrn $292 R-17G Fort 049 68 Bren-Winklo Bird $45 ri Whirecind 824 54 Cert Scoift XP934 $28 Nacion $29 63 Lindkerg ISirie $24 trance VTeil $39 55 HrnkrHicd PIrorn $32 INO KITS AVAILABLEIPrice cebject chonge ..pgq Olher Sceles Sice frern 6 Span Coorplele Pattern 25c Add 10% order far chipping & in. etc raUSA Coo & Moe Elcenchere add 15% 120% airl PrIe al catalog $1 50 Price lid dentin alone 55c *lby err foreign add $1 001* ~jrCLEYELAND MODEL& SUPPLY Co 103070 DeteejI AneClenaloed Ofia 44102 wood IL 60425 Back basics Bill Sketon Warrenton OR wrote asking What best place install belicrank leadouts biplane much outboard wing weight should used Bills question prompted fact has just ob tained kit Bucker Jungmeister has much previous biplane build ing experience placement bellcrank biplane much different other CL model should mounted onor slightly behindthe center gravity CG generally found front cockpit area biplanes build biplane CL kit would likely find plans showing bellcrank mounted CG area just de scribed1 point between top wing midpoint fuselage type installation requires cut holes fuselage skin leadouts addi tion leadouts must supported some point between fuselage wing tip usually done support mounted outer wing struts can seen accompanying photo Ed Robinsons Sopwith Camel arrangement poses no problem Sport Scale model no points awarded cockpit detail bad Scale modeler desires make Precision Scale model requires full cockpit detail Another approach bellcrank mounting biplane demonstrated Ron Sears PT-17 saw t83 Nats Ron mounted bellcrank leadout wires wholly within lower wing permitted full cockpit detail installed also did away need cutting holes fuselage having familiar leadout support mounted between wing struts placement bellcrank leadouts did make difference either models flying characteristics both great-flying planes other part Billts question much wing tip weight outboard wing According scale-biplaneflying friends amount weight used models about same other CL Scale planes model medium-sized 4-5 lb using 018 wire two three ounces used model large 6 lb 021 027 lines used three four ounces weight probably needed Northwest Regional Control Line Cham pionships will big doings Eu gene OR over 1984 Memorial Day weekend May 26 27 Eugene Prop Spinners Club cooperation other Northwest clubs individuals will hosting Northwest Regionals 84 CL contest two-day contest will have 25 events trophies through third place events addition $2000 worth mer chandise prizes will awarded special interest readers column clusion two Scale events Profile Pre YOUR GUARANTEED SATISFACTIONA Gccecc eALUE COMES WITh 80 GRIT CLOTh SANDING BELT THE SANDING BLOCK THAT WEARS BELl block made TOUGHLIGHTWEIGHT HIGH IMPACT STYRENE T EVER BREAKS WE WILL REPLACE IT FREE uses same size belt 3x18 electric hand sanders might ask WHY USE expensive belts instead cheapert sandpaper WHY BECAUSE BELT IS MORE DEPENDABLE DURABLE ECONOMICAL EASIER TO USE glueing tacking clamping sandpaper other type block Belt will slip wrinkle tear causing unwanted marks gouges finished work 1 RESIN BONDED BELT WILL GIVE YOU AT LESS COST MORE TROUBLE FREE SANDING THAN 10 SHEETS OF regular sandpaper sandpapersanding blocks can waste up 44% its sand paper just hold itself block BELT IS EASILY CHANGED IN SECONDS WITHOUT ANY DAMAGE AND SO BELT MAY BE SAVED AND USED ON MANY OTHER JOBS Since belt SO QUICKLY CHANGED pick right type grit size belt MAKE YOUR SANDING JOB EASIERSimple Use. PUSHSMALLENDOFWEDGETO THE RIGHT TO OPEN IT AND PUT THE BELT ON LEFT SIDE OF BLOCK SLIDING IT OVER TOP PART OF WEDGE CUSHION PAD ON BOTTOM GIVES SMOOTH FINISHING FOR LONGER BELT LIFE u2 SLIP THE SANDING BELT INTO PLACE AND SNAP THE WEDGE SHUT THAT IS ALL YOU DO HARD FLAT SURFACE ON TOP OF BLOCK FOR TRUE FLAT PRE CISION BUTT SANDING TO GET NEW CLEAN SANDING SURFACE AS NEEDED JUST LOOSEN WEDGE AND ROTATE BELT USE ALL 54 sq inches CHECK AT YOUR LOCAL HOBBY SHOP FOR WEDGE LOCK IF THEY DO NOT HAVE ONE ASK THEM TO GET SOME will send PREPAID 1 WEDGE LOCK BLOCK comes 80 grit cloth belt 3 EXTRA RESIN BONDED BELTS COST OF INTRO DUCTORY OFFER JUST $1000 Please fill Out coupon circle 3 belts want coupon mailing label IF YOU HAVE BLOCK AND JUST WANT BELTS WE WILL SEND YOU 6 BELTS FOR just $1000 ASK YOUR HOBBY SHOP TO CARRY BELTS Blech $800Resin 000404 BRIIO $200 egPostage & Nottdllng $200 $1000COUPON SPECIAL$1000 BELTS ALUMINUM OXIDESILCON CARBIDE 80-100-120-150-180-220220-280-360-400 FROM ART GROSS ENTERPRISES206 743-9332 12516 MAPLEWOOD AVE EDMONDS WA 98020 TO June 1984 167 Box 1063 Lorain Ohio 44055 Ph 216282-8354 Peanut Scale Models P1W Vqabmi J Piper Cob SlIm 125 Outdoor kIte inch. 3495 LIght Indoor kits mach. 3495 Sport Scale Models 22 Span PC-S Porter Taylor Cr10 Slloson Voyager Rubber CO2 Power Kilo ach. 3695 An Embryo Model willi ise Span dosigned wiol boginoers ~rt$. 3695 HARD-TO-FIND ITEMS FOR YOUR BUILDING NEEDS Early Bird TISsue f Dr Antique Aircraft 3595 True Olde Japanese Tissue 10 3 colors 95 Japanese Tissue 12 6 colors 3395 MiCrolite Plain3325 Silver3395 Microfilm Glue 3160Solvent 3125 Condenser Paper 3 sheets3375 Plan Service over 17 Scale Sport Scale & Peanot Scale Rubber Strip 020 thru 085each 3175 3/32 tfiro 5/32each 3195 Winder 61 395 Mark 1161 195 Complete Line Brown CO2 Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage mom Postage 3150 COMPLETE CATALOG 3150 Smithsonians Air Space Museum just pleasant walk So nearly everything else come Washington see modest rates give soft landing heart downtown Free over night parking Goad food reasonable prices Cafeteria Sandwich Shop Cocktail Lounge cision Scale Other major event categories Combat PAMPA Stunt Navy Carrier Speed Racing contest will held Mahlon Sweet Airport model flying site has asphalt four grass circles site also has bleachers PA system drinking foun tain spectator control fencing addi tion great flying site conditions will camping space concession truck hobby shop various model-related displays Lodging said available within few minutes drive flying field Saturday night May 26 Seattle Skyraiders Flying Lines newsletter will host Pot Luck Party field Sounds like will great contest full details contestand especially local rules Profile Scale eventwrite John Thompson 1411 Bryant Avenue Cottage Grove OR 97424 Bill Boss 77-06 269th St New Hyde Park NY 11040 CL Racing/Ballard Continued page 72 because have capable pilot close can count being available contests recall made straw poll Nats about possibility 21-size engines being specified Rat some little reluctant personal mostly big-dollar investments reasons recognized need would like ask RAC support fol lowing changes incorporated new supplemental event 1986-87 complete replacement 1988-89 new event would bring forward existing Rat rules except limiting maximum engine size 35cc 2135 cu Additional topics might need addressed individually would Single room $32 up Family room $46 up Ask about 10% dIscount AMA members 8004248532 k11 fiec HOTEL HARRUTON 11th & E Sts NW Washington DC 20004 1 Line size suggest keeping lines 018 solids two primary reasons strength safety increase drag di minish ultimate top speed reasoning takes following path First piano wire specified AMA rule book avaialble competitors stainless steel stainless steel less liable corrosion rust piano wire its strength least kinds wire avail able modeler range 80% piano wire current Rats unsafe 018 stainless However 21 Rat would quite safe using lines Second ul timate performance Racing model greatly governed horsepower avail able drag model system can use current Scale Racing supply data poiht good Scale Racer SR will run mid 14s seconds using 15 cu engine 60 ft 014 solid lines horse power nominally equivalent dis placement 21 same model would yield 14 times much horsepowerwhich would result speed increase about cube root 14or about 12% SR goes 125 mph 140 mph result Now up line size 014 018 drag lines will increse 28% linearly diameter order maintain same speed will need over twice horsepower 128 cubed Alternatively same horsepower speed will drop until drag previous level about 13% square root 128 140 mph SR back about 123 mph Now assume model streamlined SR get back about 130 mph estimation 2 possible low-nitro supplied-fuel rule should incorporated suggest use same formula now Slow Rat rules However suspect will want leave Rat un limited event existing proposed limitations Slow Rat would like pass fol lowing two questions the RAC 1 What future Slow Rat 2 What should about future course would suspect have own answers questions would like present believe future Slow Rat very dim events original purpose provide event could gotten larger portion CL modelers Rat since Rat mid-Seventies people could handle tried structure event provide official AMA Racing alternative performance-level obtainable capable being flown lesser skills required Rat original proposal disallowed Schneurle-ported enginesa proposal never made initial set rules What has happened history performance curve has made Slow Rat another event unreachable except two capable pilots disposal changes year will helpthe 10% fuel will temporarily slow event back lower speed foresee fairly rapid return performance levels near beforeagain unreachable less-than-great Slow Rat decaying contestant involvement just previous events have allowed reach too high performance level believe something needs done Slow Rat salvaged have several suggestions youve seen before would like RAC think long hard maybe support 1 Engine availability performance levels must addressed no com petitive 35s available market today K&B 58s nonexistent Tune 36/OS 36 no longer available propose choose engine class provides large choice compatible engines such class Quicky 500 engines RC boys use front intake single-bypass-port 40s several different brands competitive being Como K&B HB available good hobby shop can purchased discount magazine advertisement en gine class along 10% nitro limi tation would wise choice Anther class consider might 35cc engines described above Fast Rat Again would have significant decrease ultimate horsepower significant increase availability 2 Plane configuration typical Slow Rat 300 sq wing area difficult build other types models used competitive flying ever lot work put together might consider canges much simpler modebut corresponding decrease horsepower made Quickie Rat design use area proContinued page 170 168 Model Aviation FROM HOTEL HARRINGTON WASHINGTON IS JUST SHORT GLIDE