Fee Flight Duration Bob Meuser NOMINATIONS order NFFS Model Year Awards Free Flight Hall Fame Awards 1982 Suddenly its next year already Model Year awards presented annual ly outstanding models good track record competition award can given models dont meet criterion well non-models example Fulton Hungerfords tiny Ford Trimotor got award although could barely fly across room nevertheless outstanding example way-out facet Free Flight technology Old-Timer Pea nut Scale Pennyplane events subjects awards have Seeligtimer Rossi engine Send nominations Gil Graunke 15260 Heather Hill Dr Brooktjeld WI 53005 Hall Fame awards arepresentedto individu als have made noteworthy contribution Free Flight outstanding performance com petition some other way Send nomi nations J Italiano 1655 Revere Drive Brookfield WI 53005 Nominations can accepted up January 1 1982but wait Trick TE joints days yore simply glued Rib Trailing Edge B per instruc tions supplied hoped best remained blissful ignorance super-thick air foilsElifel 400 RAF-32nothing bad ever happened did always bad weather bad luck Devil himself blame later airfoils got thinner trailing edges seemed have minds own would bend up down according own preferences airfoil got airfoil intended clearly miracle Solutions evolved slotted TE tri angular gusset became alternate standards Lowshrink non-shrink gluescyanoacrylates ali phatics epoxieshelped too So needs solution solved problem Everybody thats solution involves compromises slot ting TE reduces its stiffness strength gussets weigh fancy-pants glues opposed plain old model airplane cement make smooth sanding difficult impossible solution presented came Ralph Preys Satellite reported Ed Hopkins used ex-FAI-power-team member Tom McLaughlan solution others has both advantages disadvantages solution illustrated lowermost three sketches What amounts simply piece round toothpick hors doeuvre pick glued appropriate hole TE also glued side rib weakens TE perhaps much slotting weighs perhaps much gusset requires some effort cut hors-doeuvre pick length drill hole glue place perhaps much slotting TE whacking out gussets Seredinsky airfoil recent issue Free Flight Digest NFFS included airfoil used Joe Foster highly successful Wakefield models first place US Team Selec tion Finals eighth place 1981 World Cham pionships based Seredinsky Flamingo airfoil misspelled itSaradensky Hank Cole took task would feel name Seredinsky someone called Saradensky followed some background foil replied name like Saridansky Id probably shoot myself name like Meuser nobody spells right bad enough live Thanks information Saridinski foil cor recting spelling sure feel lot better now can spell Saradinsky correctly Anyhow what Hank say about first saw airfoil section Journal Aeronautical Sciences May 1957 article Charwat Since no coordinates given enlarged drawing measured upper surfaces doubtful accuracy considering other modifications airfoil too bad result airfoil used 1964 Wakefield Also data Charwats paper used 1970 Symposium paper Selection Aspect Ratio Minimum Sinking Speed Nordic Glider last year found co ordinates Alfried Gymnichs DerModellflug Jahrbuch 195 3/1954 what Joe Foster used airfoil added favorite undercamber As far know nobody has guts use original Flamingo lower surface model believe used highaltitude compressors need structural strength new Wakefield am using 110 lower-surface angle see sketch think better minimum sink 70 used Joe lower surface gives faster glide good penetration probably better initial burst climb all-condition Wakefield think 70 best dead-air maximum time think 110 has potential idea behind lower surface Seredinsky foil apparently goes something like Design airfoil give desired charac teristics too thin structural requirements add spar lower surface Fair spar appropriate streamlining Tr effective spar its fairing must sufficiently small its effect flows over upper surface bulk /________________________ ii CoLe-To -&rcctinsliy Rather Exceptional Airfoil Das Flamingo-Profil Se-4410 vom Dipl-lng Seredinsky X025575 V27562574 l27262932 LEradius notspecified 101520 815931005 31526145 2530 1035104 0601 4050 10191 0515 6070809095 77562544235125 212150602 60 Model Aviation hank LoIe 1855 model first com petition flapper Its flaps trimmed up climb down glide 100 02 0 ozo mu5ic wires Ruer uavtd 1ZT IPotroftt 7 1uLt pin wid Bfairiv Count Pisanas tricky retract gearfor small models column upEnd ccj rib -Still another scheme ribless wing construction Wino Do~bLe-bcdc tctper Ku Scrndin3 block Its easierto sand dihedral angle HLG wing doesnt squirm around youre working Double-back carpet tape jigblock root-end bench works great lower surface minimal addition fairing must sufficient make drag spar acceptable Too much fairing resulting flatbottom foil example lose game main airstream entering leaving region airfoil must too myopic see blip lower surface best knowledge principle hasnt employed significant way competition Free Flight has potential Double-sided tape rescue Jerry Guiles writes ~After half-century sanding carving balsa wood goodness its wonder Trailb ed3c- TE rouirtd toothjnd set kokinT-f Two typicaland newmethods attaching ribs TE theres much left poor wing RBM discovered neat way hold section glider wing sanding dihedral angle ends joined Thanks product called double back tape can probably get carpet store can hold slippery rascal wing light fingertip pressure sketch tells story Double-stickum tape comes variety forms common being like either masking tape transparent cellophane tape goo both sides peel-off backing strip Sources include paint hardware department startionery stores Its good sorts stuff involving either permanently temporarily holding things together Ive used holding rib former templates balsa strip stuck workbench will keep small parts getting scattered hold small part glue something Back glider joint Some modelers use sandpaper taped work-surface double stickum tape course nonskid surface Some modelers hold wing against horizontal surface either eyeball correct sanding angle use auxiliary fixture guide sanding block correct angle Guiles Continued page 137 Dick Howard R liked MAs Ms Peach design much builtfour themall different scales Phyllis Warner Charlie Sink watch model winding stooge Local sexist joke No 1 Say can borrow winding stooge No 2 Nope sorry shes back theCampbells Custom Kits offer Souper 30 P-30 class model trailer making sandwichesyoung lady holding model Tara Campbell December1981 61 THE BEST IN GIANT SCALE Make Right Choice First Time ~QWrz 24 CuIn Suggested List $21995 Dealers Direct It,- 24 60110 a,ait a,i ma,oe atflC ae Sgs i,atte 0 oOC-iOOe Conoes Cane 00 ia Japan SOC ac Ii sesoo has eooCd 0 io olsiaoonqooooesoetoTOibs Use iOo,iaio ptn,m perloman e aye eiabito 5 acoas tCO0CS ooh iKo,ta COQoCs a, 32 HP infleCt SaP aesrinyn crank RoSier Saarnga a, ike Rod a,a Wophte 6 7/2 /5, NEW1 R M TITAN 43Culn 61/2HP $28995 MARINE KIORITZ complete recoil start er mount water-cooled head reccommended 48 to72 hullsN $18995Z Sold Direct Only -y Zinger Props20 24 diameter 10 1 6 pitched Exhaust Manifold Kltfits Kjoritz Kawasaki Ep others Velocity Stack Kit Kioritz Quadra Six-Bolt Prop Hub Quadra Special Length Prop Hubs Kiortz & other engines Kioritz Digital Tach Spark impulse triggered Rennet Muffler BElS Specialties Champion Plugs RCJ-8 resistor Belray MC-1 Synthetic Oil 112 oz 501 mis Call Write Fall Details $1000 300 1995 1995 5995 1795 250 295 TI, P M 0 i,so oil oat ,IowC-iOpC enanC ,,IeooSoo,WGeooaooti40sB12HPOI ,sosir, q ,oiopowea,lfeaioeShosiOail ,e00O500iS0C30tOl I,a~nqs o,nC rod ,l,-qoroo ease osraliaion Tflo 00 0 HO, CS Hops 10, 0 momo, 22, 2 re w,o 2416 PM 11,, 5 ,i,Oi SC Noseo ao, Zol sai,,is a,i olne t,ifl oelom oce ICsO,s Posseee 50 PM TI,, omes corn ole Wti 6-Poll poo hl cost olft,,,lCSSiOOlt5 sANDYVILLE OHIO R OUSH MPG Phone 216 866-9462 484-4374 organizers held meeting team managers agreed awards would accepted view circumstances further participation ceremonies would cut short remarkable World Cham pionships drew close Lothar Doring stand ing crutches received Wakefield Cup loud cheers Sandy Pimenotispoke contin uing need carry forward spirit friendship good will basis Free Flight competition spirit brought gether sportsmen 3 1 countries spirit carried away us FF Duration/Meuser Continued page 61 method solves problem Ribless construction revisited Febru ary 1980 column showed form ribless wing construction have used non-ribs simply stripwood insist undercamber simply Indoor-style uniformdepth sliced ribs similar scheme credited Harold Osborne apparently taken ancient model magazine popped up Scale News Views Osbornes design has differ ent twist see sketch sheet balsa used trailing edge set angle give undercamber effect means use quarterNavy Best Ducted Fans SKYRA Y Plan Farm Designed 8i11 Effinger Its Radio Control SKYRAY NAVY F4D1 ale Ducled Fan R/O RK-20 Fan Unit ong Plan Set ROOF-i $1995 Prices Complete Plans Sub Assembly Detailed Parts Lists Add $200 Mailing Tube Send Brochure Details new designs & great things come Send $100 refundable information sawn C-grain sheet plasticized dope avoid warps Non-ribs may zigzagged added stiffness Trick LG received sketch reproduced pull-pin device actuating retractable landing gear Count Pisana address same Bill Warners Bill either has rather classy house guests delusions gran deur pull-pin made music wire perhaps heavy monofilament fishing leader holds landing gear takeoff positionis secured terra firma appro priate length thread Counts application Embryo Endurance class model required take off table top Other applications come mind Rubber-Power Speed AMA Outdoor Rubber-Power Scale etc best check rules could considered dropping parts flight Allegedly drag Ys-in-wide leg fairing helps gear retract acts oar help row boat Non-climbing rubber hook revisited talking about devised Paul Mcllrath shown June issue Paul used such hooks models took SNART Indoor meet found hook wasnt always effective motor length approached twice hook spacing others longer motors werent having problems So asked several fliers especially long motors what kind hook using first used S-shape hook Paul says cant bend second used Pauls design third used either diamond-shape hook plain round hook usually notorious climbing So much science Perhaps impor tant factor kind rubber used way wind way hold mouth Walter Erbach reports nifty device trimming microfilm especially field after repairs Walt describes devices ectiny disposable battery-powered cauteries used physicians suppose wart removal like shaped like pencil flashlight operate two penlight cells Ive gotten local medical supply house no problem cost about six bucks shot under heavy current drain required heat tip fleshburning microfilm-melting temperature battery life short Although intended disposables anyone enough ingenuity build model plane can figure disembowel replace batteries neat alternative rechargeable batterypowered soldering pencil price about $20 theyre really recommended removing warts 1981 NFFS Symposium Report now available fourteenth Sympo report includes word Decembef 1981137 NEW FOURMOST PRODUCTS! FOURMOST RECOIL TUBING four foot length super-tough fuel-proof urethane tubing pro-formed FOUR-INCH COIL allows placement field box can convenient distance aircraft boat After use tubing will retract its earlier space-saving form price$3 95 WE HAVE THE ING TION ORsmall Size 3/32 IDPrice S2OO 1 Tee 1 Elbow 1 union 1 Plug 4040 24th Ave Forest Grove OR 97116 FO URMOST PROD UCTS Telenhone 503 357-2732 CARBON FIBER TAPE 005x 125 wide 25f-t5OftlOOft $895$1495$2695 p&h SLOPE ASSOCIATES 2317 n 63d SEATTLE 8103 Exec Hardy Brodersen Introduction Editor Bill Rennet Some Thoughts Designing Trimming Power Model Gil Moms Hunting Elusive Thermal Stan Mike Stoy Some Psychological As pects Model Competition William L Baker Determine Rubber-Powered Air plane Propeller Efficiencies John Gard Trim Thermalling William Baker Problem Winning Losing Andrew Bauer Structureless Foam Composite Construction Ron St Jean Up date High-Performance Airfoils Bruce Carmichael Tail Aspect Ratio Must Small Jean Wantzenreither Airfoil Data Model Aircrafta Book Review Bruce Carmichael Ten Years Hook Works Bob Hatschek stories about five NFFS Hall Fame awardees stories about the Ten Model Year awardees along drawings of models addition lists AMA Nats World Champs winners starting Year listing NFFS Model Year award-winning models since first awards 1970 handy reference tables contents 1 3 previous Sympo reports listed course Nakashima cartoons photos galore Prices $750 NFFS members nonUSA residents $850 others Postage Fourth Class anywhere world number copies $150 Order NFFS Plans Publications 4858 Moorpark Ave San Jose CA 95129 New products department following items have come attention P-30 Kit offered Campbells Custom Kits now offering kit Souper 30 conforming rules P-30 classsmallest Outdoor Rubber-Power competition classes Kit includes hardware 9-in plastic prop re quired rules pre-cut ribs tissue stripwood plans instruction rubber Price $1098 Extra-cost items offered spare prop $50 spare rubber motor $35 Jim Crocket CR102 winding hook $195 No 30 blast-proof winding tube winding wire $195 Other items offered Campbells include Outdoor Hand-Launch Glider kits regulation Payload dummy Campbells will custom-cut Free Flight kit plan production Address Box 5996 Lake Worth FL 33461 Phone 305 968-1045 Shipping $200 per order free orders $2500 Bob Meuser 4200 Gregory St Oaklan4 CA 94619 Santos-Dumont 1 4-bis/SrulI Continued page 68 no warps have crept wings Using pusher prop Tornado makes 8-6 try first test flights ROG However fly grass dirt field forward skid may provide too much drag reliable takeoffs case add small wheel l okay front skid look closely flight photos will notice pair small nose wheels model Once trimmed hand-launching will possible fly hard surface runway scale skid should satisfactory 4-bis will take off fly amazingly slow speed Stalls gentle may fly through noticin& speed drops slowly nose rises straight mushing descent begins Simply drop nose JET HAWK F-4 PHANTOM F-IS EAGLE HUNDERBIRD REVENGER T II TLAS BOOTLEGGER C Q 94ft ATOR ZLI -50 L LASEFINST-AKIN OBRA PATIG EJANI WCICKfMr RD RI NSW~III ATLAS BOOTL GGE OMPR ZLIN Z SOL LASER 20 3 LYING TIGER PLAN JAN t r Local Dealer Send $1 00 Catalog v Ar 138 Model Aviation f FUEL LINE PIPING PROBLEM Size 1 16 DPrice SI50LARGE 1 Tee 2 E bows Pen Bladder Tee Flying Near Airports Careful Free Flight Radio Control flying near airports situation might involve possibility models being vicinity full-scale aircraft operations must avoidedor conducted eliminate dangerous situations Models should flown proximity full-scale aircraft operations unless flyer has someone else him sole purpose watching full-scale aircraft supervising flying prevent accident possibilities PROTECT YOUR RIGHT TO FLY xr Or// UARE EAGLE P-30 hirsi Senior ens junior 1981 lets first end Second Open iSiS lets first ipen 1979 SSFFE IT oJIfS tome finest nnnlornfteo free flight kits youll ever see beginners ens experts 51205 pies tli5 snipping tetniog -BLUE RIDGE MODELS. BOX 429A SKYLANO N css~e
Edition: Model Aviation - 1981/12
Page Numbers: 60, 61, 137, 138
Fee Flight Duration Bob Meuser NOMINATIONS order NFFS Model Year Awards Free Flight Hall Fame Awards 1982 Suddenly its next year already Model Year awards presented annual ly outstanding models good track record competition award can given models dont meet criterion well non-models example Fulton Hungerfords tiny Ford Trimotor got award although could barely fly across room nevertheless outstanding example way-out facet Free Flight technology Old-Timer Pea nut Scale Pennyplane events subjects awards have Seeligtimer Rossi engine Send nominations Gil Graunke 15260 Heather Hill Dr Brooktjeld WI 53005 Hall Fame awards arepresentedto individu als have made noteworthy contribution Free Flight outstanding performance com petition some other way Send nomi nations J Italiano 1655 Revere Drive Brookfield WI 53005 Nominations can accepted up January 1 1982but wait Trick TE joints days yore simply glued Rib Trailing Edge B per instruc tions supplied hoped best remained blissful ignorance super-thick air foilsElifel 400 RAF-32nothing bad ever happened did always bad weather bad luck Devil himself blame later airfoils got thinner trailing edges seemed have minds own would bend up down according own preferences airfoil got airfoil intended clearly miracle Solutions evolved slotted TE tri angular gusset became alternate standards Lowshrink non-shrink gluescyanoacrylates ali phatics epoxieshelped too So needs solution solved problem Everybody thats solution involves compromises slot ting TE reduces its stiffness strength gussets weigh fancy-pants glues opposed plain old model airplane cement make smooth sanding difficult impossible solution presented came Ralph Preys Satellite reported Ed Hopkins used ex-FAI-power-team member Tom McLaughlan solution others has both advantages disadvantages solution illustrated lowermost three sketches What amounts simply piece round toothpick hors doeuvre pick glued appropriate hole TE also glued side rib weakens TE perhaps much slotting weighs perhaps much gusset requires some effort cut hors-doeuvre pick length drill hole glue place perhaps much slotting TE whacking out gussets Seredinsky airfoil recent issue Free Flight Digest NFFS included airfoil used Joe Foster highly successful Wakefield models first place US Team Selec tion Finals eighth place 1981 World Cham pionships based Seredinsky Flamingo airfoil misspelled itSaradensky Hank Cole took task would feel name Seredinsky someone called Saradensky followed some background foil replied name like Saridansky Id probably shoot myself name like Meuser nobody spells right bad enough live Thanks information Saridinski foil cor recting spelling sure feel lot better now can spell Saradinsky correctly Anyhow what Hank say about first saw airfoil section Journal Aeronautical Sciences May 1957 article Charwat Since no coordinates given enlarged drawing measured upper surfaces doubtful accuracy considering other modifications airfoil too bad result airfoil used 1964 Wakefield Also data Charwats paper used 1970 Symposium paper Selection Aspect Ratio Minimum Sinking Speed Nordic Glider last year found co ordinates Alfried Gymnichs DerModellflug Jahrbuch 195 3/1954 what Joe Foster used airfoil added favorite undercamber As far know nobody has guts use original Flamingo lower surface model believe used highaltitude compressors need structural strength new Wakefield am using 110 lower-surface angle see sketch think better minimum sink 70 used Joe lower surface gives faster glide good penetration probably better initial burst climb all-condition Wakefield think 70 best dead-air maximum time think 110 has potential idea behind lower surface Seredinsky foil apparently goes something like Design airfoil give desired charac teristics too thin structural requirements add spar lower surface Fair spar appropriate streamlining Tr effective spar its fairing must sufficiently small its effect flows over upper surface bulk /________________________ ii CoLe-To -&rcctinsliy Rather Exceptional Airfoil Das Flamingo-Profil Se-4410 vom Dipl-lng Seredinsky X025575 V27562574 l27262932 LEradius notspecified 101520 815931005 31526145 2530 1035104 0601 4050 10191 0515 6070809095 77562544235125 212150602 60 Model Aviation hank LoIe 1855 model first com petition flapper Its flaps trimmed up climb down glide 100 02 0 ozo mu5ic wires Ruer uavtd 1ZT IPotroftt 7 1uLt pin wid Bfairiv Count Pisanas tricky retract gearfor small models column upEnd ccj rib -Still another scheme ribless wing construction Wino Do~bLe-bcdc tctper Ku Scrndin3 block Its easierto sand dihedral angle HLG wing doesnt squirm around youre working Double-back carpet tape jigblock root-end bench works great lower surface minimal addition fairing must sufficient make drag spar acceptable Too much fairing resulting flatbottom foil example lose game main airstream entering leaving region airfoil must too myopic see blip lower surface best knowledge principle hasnt employed significant way competition Free Flight has potential Double-sided tape rescue Jerry Guiles writes ~After half-century sanding carving balsa wood goodness its wonder Trailb ed3c- TE rouirtd toothjnd set kokinT-f Two typicaland newmethods attaching ribs TE theres much left poor wing RBM discovered neat way hold section glider wing sanding dihedral angle ends joined Thanks product called double back tape can probably get carpet store can hold slippery rascal wing light fingertip pressure sketch tells story Double-stickum tape comes variety forms common being like either masking tape transparent cellophane tape goo both sides peel-off backing strip Sources include paint hardware department startionery stores Its good sorts stuff involving either permanently temporarily holding things together Ive used holding rib former templates balsa strip stuck workbench will keep small parts getting scattered hold small part glue something Back glider joint Some modelers use sandpaper taped work-surface double stickum tape course nonskid surface Some modelers hold wing against horizontal surface either eyeball correct sanding angle use auxiliary fixture guide sanding block correct angle Guiles Continued page 137 Dick Howard R liked MAs Ms Peach design much builtfour themall different scales Phyllis Warner Charlie Sink watch model winding stooge Local sexist joke No 1 Say can borrow winding stooge No 2 Nope sorry shes back theCampbells Custom Kits offer Souper 30 P-30 class model trailer making sandwichesyoung lady holding model Tara Campbell December1981 61 THE BEST IN GIANT SCALE Make Right Choice First Time ~QWrz 24 CuIn Suggested List $21995 Dealers Direct It,- 24 60110 a,ait a,i ma,oe atflC ae Sgs i,atte 0 oOC-iOOe Conoes Cane 00 ia Japan SOC ac Ii sesoo has eooCd 0 io olsiaoonqooooesoetoTOibs Use iOo,iaio ptn,m perloman e aye eiabito 5 acoas tCO0CS ooh iKo,ta COQoCs a, 32 HP infleCt SaP aesrinyn crank RoSier Saarnga a, ike Rod a,a Wophte 6 7/2 /5, NEW1 R M TITAN 43Culn 61/2HP $28995 MARINE KIORITZ complete recoil start er mount water-cooled head reccommended 48 to72 hullsN $18995Z Sold Direct Only -y Zinger Props20 24 diameter 10 1 6 pitched Exhaust Manifold Kltfits Kjoritz Kawasaki Ep others Velocity Stack Kit Kioritz Quadra Six-Bolt Prop Hub Quadra Special Length Prop Hubs Kiortz & other engines Kioritz Digital Tach Spark impulse triggered Rennet Muffler BElS Specialties Champion Plugs RCJ-8 resistor Belray MC-1 Synthetic Oil 112 oz 501 mis Call Write Fall Details $1000 300 1995 1995 5995 1795 250 295 TI, P M 0 i,so oil oat ,IowC-iOpC enanC ,,IeooSoo,WGeooaooti40sB12HPOI ,sosir, q ,oiopowea,lfeaioeShosiOail ,e00O500iS0C30tOl I,a~nqs o,nC rod ,l,-qoroo ease osraliaion Tflo 00 0 HO, CS Hops 10, 0 momo, 22, 2 re w,o 2416 PM 11,, 5 ,i,Oi SC Noseo ao, Zol sai,,is a,i olne t,ifl oelom oce ICsO,s Posseee 50 PM TI,, omes corn ole Wti 6-Poll poo hl cost olft,,,lCSSiOOlt5 sANDYVILLE OHIO R OUSH MPG Phone 216 866-9462 484-4374 organizers held meeting team managers agreed awards would accepted view circumstances further participation ceremonies would cut short remarkable World Cham pionships drew close Lothar Doring stand ing crutches received Wakefield Cup loud cheers Sandy Pimenotispoke contin uing need carry forward spirit friendship good will basis Free Flight competition spirit brought gether sportsmen 3 1 countries spirit carried away us FF Duration/Meuser Continued page 61 method solves problem Ribless construction revisited Febru ary 1980 column showed form ribless wing construction have used non-ribs simply stripwood insist undercamber simply Indoor-style uniformdepth sliced ribs similar scheme credited Harold Osborne apparently taken ancient model magazine popped up Scale News Views Osbornes design has differ ent twist see sketch sheet balsa used trailing edge set angle give undercamber effect means use quarterNavy Best Ducted Fans SKYRA Y Plan Farm Designed 8i11 Effinger Its Radio Control SKYRAY NAVY F4D1 ale Ducled Fan R/O RK-20 Fan Unit ong Plan Set ROOF-i $1995 Prices Complete Plans Sub Assembly Detailed Parts Lists Add $200 Mailing Tube Send Brochure Details new designs & great things come Send $100 refundable information sawn C-grain sheet plasticized dope avoid warps Non-ribs may zigzagged added stiffness Trick LG received sketch reproduced pull-pin device actuating retractable landing gear Count Pisana address same Bill Warners Bill either has rather classy house guests delusions gran deur pull-pin made music wire perhaps heavy monofilament fishing leader holds landing gear takeoff positionis secured terra firma appro priate length thread Counts application Embryo Endurance class model required take off table top Other applications come mind Rubber-Power Speed AMA Outdoor Rubber-Power Scale etc best check rules could considered dropping parts flight Allegedly drag Ys-in-wide leg fairing helps gear retract acts oar help row boat Non-climbing rubber hook revisited talking about devised Paul Mcllrath shown June issue Paul used such hooks models took SNART Indoor meet found hook wasnt always effective motor length approached twice hook spacing others longer motors werent having problems So asked several fliers especially long motors what kind hook using first used S-shape hook Paul says cant bend second used Pauls design third used either diamond-shape hook plain round hook usually notorious climbing So much science Perhaps impor tant factor kind rubber used way wind way hold mouth Walter Erbach reports nifty device trimming microfilm especially field after repairs Walt describes devices ectiny disposable battery-powered cauteries used physicians suppose wart removal like shaped like pencil flashlight operate two penlight cells Ive gotten local medical supply house no problem cost about six bucks shot under heavy current drain required heat tip fleshburning microfilm-melting temperature battery life short Although intended disposables anyone enough ingenuity build model plane can figure disembowel replace batteries neat alternative rechargeable batterypowered soldering pencil price about $20 theyre really recommended removing warts 1981 NFFS Symposium Report now available fourteenth Sympo report includes word Decembef 1981137 NEW FOURMOST PRODUCTS! FOURMOST RECOIL TUBING four foot length super-tough fuel-proof urethane tubing pro-formed FOUR-INCH COIL allows placement field box can convenient distance aircraft boat After use tubing will retract its earlier space-saving form price$3 95 WE HAVE THE ING TION ORsmall Size 3/32 IDPrice S2OO 1 Tee 1 Elbow 1 union 1 Plug 4040 24th Ave Forest Grove OR 97116 FO URMOST PROD UCTS Telenhone 503 357-2732 CARBON FIBER TAPE 005x 125 wide 25f-t5OftlOOft $895$1495$2695 p&h SLOPE ASSOCIATES 2317 n 63d SEATTLE 8103 Exec Hardy Brodersen Introduction Editor Bill Rennet Some Thoughts Designing Trimming Power Model Gil Moms Hunting Elusive Thermal Stan Mike Stoy Some Psychological As pects Model Competition William L Baker Determine Rubber-Powered Air plane Propeller Efficiencies John Gard Trim Thermalling William Baker Problem Winning Losing Andrew Bauer Structureless Foam Composite Construction Ron St Jean Up date High-Performance Airfoils Bruce Carmichael Tail Aspect Ratio Must Small Jean Wantzenreither Airfoil Data Model Aircrafta Book Review Bruce Carmichael Ten Years Hook Works Bob Hatschek stories about five NFFS Hall Fame awardees stories about the Ten Model Year awardees along drawings of models addition lists AMA Nats World Champs winners starting Year listing NFFS Model Year award-winning models since first awards 1970 handy reference tables contents 1 3 previous Sympo reports listed course Nakashima cartoons photos galore Prices $750 NFFS members nonUSA residents $850 others Postage Fourth Class anywhere world number copies $150 Order NFFS Plans Publications 4858 Moorpark Ave San Jose CA 95129 New products department following items have come attention P-30 Kit offered Campbells Custom Kits now offering kit Souper 30 conforming rules P-30 classsmallest Outdoor Rubber-Power competition classes Kit includes hardware 9-in plastic prop re quired rules pre-cut ribs tissue stripwood plans instruction rubber Price $1098 Extra-cost items offered spare prop $50 spare rubber motor $35 Jim Crocket CR102 winding hook $195 No 30 blast-proof winding tube winding wire $195 Other items offered Campbells include Outdoor Hand-Launch Glider kits regulation Payload dummy Campbells will custom-cut Free Flight kit plan production Address Box 5996 Lake Worth FL 33461 Phone 305 968-1045 Shipping $200 per order free orders $2500 Bob Meuser 4200 Gregory St Oaklan4 CA 94619 Santos-Dumont 1 4-bis/SrulI Continued page 68 no warps have crept wings Using pusher prop Tornado makes 8-6 try first test flights ROG However fly grass dirt field forward skid may provide too much drag reliable takeoffs case add small wheel l okay front skid look closely flight photos will notice pair small nose wheels model Once trimmed hand-launching will possible fly hard surface runway scale skid should satisfactory 4-bis will take off fly amazingly slow speed Stalls gentle may fly through noticin& speed drops slowly nose rises straight mushing descent begins Simply drop nose JET HAWK F-4 PHANTOM F-IS EAGLE HUNDERBIRD REVENGER T II TLAS BOOTLEGGER C Q 94ft ATOR ZLI -50 L LASEFINST-AKIN OBRA PATIG EJANI WCICKfMr RD RI NSW~III ATLAS BOOTL GGE OMPR ZLIN Z SOL LASER 20 3 LYING TIGER PLAN JAN t r Local Dealer Send $1 00 Catalog v Ar 138 Model Aviation f FUEL LINE PIPING PROBLEM Size 1 16 DPrice SI50LARGE 1 Tee 2 E bows Pen Bladder Tee Flying Near Airports Careful Free Flight Radio Control flying near airports situation might involve possibility models being vicinity full-scale aircraft operations must avoidedor conducted eliminate dangerous situations Models should flown proximity full-scale aircraft operations unless flyer has someone else him sole purpose watching full-scale aircraft supervising flying prevent accident possibilities PROTECT YOUR RIGHT TO FLY xr Or// UARE EAGLE P-30 hirsi Senior ens junior 1981 lets first end Second Open iSiS lets first ipen 1979 SSFFE IT oJIfS tome finest nnnlornfteo free flight kits youll ever see beginners ens experts 51205 pies tli5 snipping tetniog -BLUE RIDGE MODELS. BOX 429A SKYLANO N css~e
Edition: Model Aviation - 1981/12
Page Numbers: 60, 61, 137, 138
Fee Flight Duration Bob Meuser NOMINATIONS order NFFS Model Year Awards Free Flight Hall Fame Awards 1982 Suddenly its next year already Model Year awards presented annual ly outstanding models good track record competition award can given models dont meet criterion well non-models example Fulton Hungerfords tiny Ford Trimotor got award although could barely fly across room nevertheless outstanding example way-out facet Free Flight technology Old-Timer Pea nut Scale Pennyplane events subjects awards have Seeligtimer Rossi engine Send nominations Gil Graunke 15260 Heather Hill Dr Brooktjeld WI 53005 Hall Fame awards arepresentedto individu als have made noteworthy contribution Free Flight outstanding performance com petition some other way Send nomi nations J Italiano 1655 Revere Drive Brookfield WI 53005 Nominations can accepted up January 1 1982but wait Trick TE joints days yore simply glued Rib Trailing Edge B per instruc tions supplied hoped best remained blissful ignorance super-thick air foilsElifel 400 RAF-32nothing bad ever happened did always bad weather bad luck Devil himself blame later airfoils got thinner trailing edges seemed have minds own would bend up down according own preferences airfoil got airfoil intended clearly miracle Solutions evolved slotted TE tri angular gusset became alternate standards Lowshrink non-shrink gluescyanoacrylates ali phatics epoxieshelped too So needs solution solved problem Everybody thats solution involves compromises slot ting TE reduces its stiffness strength gussets weigh fancy-pants glues opposed plain old model airplane cement make smooth sanding difficult impossible solution presented came Ralph Preys Satellite reported Ed Hopkins used ex-FAI-power-team member Tom McLaughlan solution others has both advantages disadvantages solution illustrated lowermost three sketches What amounts simply piece round toothpick hors doeuvre pick glued appropriate hole TE also glued side rib weakens TE perhaps much slotting weighs perhaps much gusset requires some effort cut hors-doeuvre pick length drill hole glue place perhaps much slotting TE whacking out gussets Seredinsky airfoil recent issue Free Flight Digest NFFS included airfoil used Joe Foster highly successful Wakefield models first place US Team Selec tion Finals eighth place 1981 World Cham pionships based Seredinsky Flamingo airfoil misspelled itSaradensky Hank Cole took task would feel name Seredinsky someone called Saradensky followed some background foil replied name like Saridansky Id probably shoot myself name like Meuser nobody spells right bad enough live Thanks information Saridinski foil cor recting spelling sure feel lot better now can spell Saradinsky correctly Anyhow what Hank say about first saw airfoil section Journal Aeronautical Sciences May 1957 article Charwat Since no coordinates given enlarged drawing measured upper surfaces doubtful accuracy considering other modifications airfoil too bad result airfoil used 1964 Wakefield Also data Charwats paper used 1970 Symposium paper Selection Aspect Ratio Minimum Sinking Speed Nordic Glider last year found co ordinates Alfried Gymnichs DerModellflug Jahrbuch 195 3/1954 what Joe Foster used airfoil added favorite undercamber As far know nobody has guts use original Flamingo lower surface model believe used highaltitude compressors need structural strength new Wakefield am using 110 lower-surface angle see sketch think better minimum sink 70 used Joe lower surface gives faster glide good penetration probably better initial burst climb all-condition Wakefield think 70 best dead-air maximum time think 110 has potential idea behind lower surface Seredinsky foil apparently goes something like Design airfoil give desired charac teristics too thin structural requirements add spar lower surface Fair spar appropriate streamlining Tr effective spar its fairing must sufficiently small its effect flows over upper surface bulk /________________________ ii CoLe-To -&rcctinsliy Rather Exceptional Airfoil Das Flamingo-Profil Se-4410 vom Dipl-lng Seredinsky X025575 V27562574 l27262932 LEradius notspecified 101520 815931005 31526145 2530 1035104 0601 4050 10191 0515 6070809095 77562544235125 212150602 60 Model Aviation hank LoIe 1855 model first com petition flapper Its flaps trimmed up climb down glide 100 02 0 ozo mu5ic wires Ruer uavtd 1ZT IPotroftt 7 1uLt pin wid Bfairiv Count Pisanas tricky retract gearfor small models column upEnd ccj rib -Still another scheme ribless wing construction Wino Do~bLe-bcdc tctper Ku Scrndin3 block Its easierto sand dihedral angle HLG wing doesnt squirm around youre working Double-back carpet tape jigblock root-end bench works great lower surface minimal addition fairing must sufficient make drag spar acceptable Too much fairing resulting flatbottom foil example lose game main airstream entering leaving region airfoil must too myopic see blip lower surface best knowledge principle hasnt employed significant way competition Free Flight has potential Double-sided tape rescue Jerry Guiles writes ~After half-century sanding carving balsa wood goodness its wonder Trailb ed3c- TE rouirtd toothjnd set kokinT-f Two typicaland newmethods attaching ribs TE theres much left poor wing RBM discovered neat way hold section glider wing sanding dihedral angle ends joined Thanks product called double back tape can probably get carpet store can hold slippery rascal wing light fingertip pressure sketch tells story Double-stickum tape comes variety forms common being like either masking tape transparent cellophane tape goo both sides peel-off backing strip Sources include paint hardware department startionery stores Its good sorts stuff involving either permanently temporarily holding things together Ive used holding rib former templates balsa strip stuck workbench will keep small parts getting scattered hold small part glue something Back glider joint Some modelers use sandpaper taped work-surface double stickum tape course nonskid surface Some modelers hold wing against horizontal surface either eyeball correct sanding angle use auxiliary fixture guide sanding block correct angle Guiles Continued page 137 Dick Howard R liked MAs Ms Peach design much builtfour themall different scales Phyllis Warner Charlie Sink watch model winding stooge Local sexist joke No 1 Say can borrow winding stooge No 2 Nope sorry shes back theCampbells Custom Kits offer Souper 30 P-30 class model trailer making sandwichesyoung lady holding model Tara Campbell December1981 61 THE BEST IN GIANT SCALE Make Right Choice First Time ~QWrz 24 CuIn Suggested List $21995 Dealers Direct It,- 24 60110 a,ait a,i ma,oe atflC ae Sgs i,atte 0 oOC-iOOe Conoes Cane 00 ia Japan SOC ac Ii sesoo has eooCd 0 io olsiaoonqooooesoetoTOibs Use iOo,iaio ptn,m perloman e aye eiabito 5 acoas tCO0CS ooh iKo,ta COQoCs a, 32 HP infleCt SaP aesrinyn crank RoSier Saarnga a, ike Rod a,a Wophte 6 7/2 /5, NEW1 R M TITAN 43Culn 61/2HP $28995 MARINE KIORITZ complete recoil start er mount water-cooled head reccommended 48 to72 hullsN $18995Z Sold Direct Only -y Zinger Props20 24 diameter 10 1 6 pitched Exhaust Manifold Kltfits Kjoritz Kawasaki Ep others Velocity Stack Kit Kioritz Quadra Six-Bolt Prop Hub Quadra Special Length Prop Hubs Kiortz & other engines Kioritz Digital Tach Spark impulse triggered Rennet Muffler BElS Specialties Champion Plugs RCJ-8 resistor Belray MC-1 Synthetic Oil 112 oz 501 mis Call Write Fall Details $1000 300 1995 1995 5995 1795 250 295 TI, P M 0 i,so oil oat ,IowC-iOpC enanC ,,IeooSoo,WGeooaooti40sB12HPOI ,sosir, q ,oiopowea,lfeaioeShosiOail ,e00O500iS0C30tOl I,a~nqs o,nC rod ,l,-qoroo ease osraliaion Tflo 00 0 HO, CS Hops 10, 0 momo, 22, 2 re w,o 2416 PM 11,, 5 ,i,Oi SC Noseo ao, Zol sai,,is a,i olne t,ifl oelom oce ICsO,s Posseee 50 PM TI,, omes corn ole Wti 6-Poll poo hl cost olft,,,lCSSiOOlt5 sANDYVILLE OHIO R OUSH MPG Phone 216 866-9462 484-4374 organizers held meeting team managers agreed awards would accepted view circumstances further participation ceremonies would cut short remarkable World Cham pionships drew close Lothar Doring stand ing crutches received Wakefield Cup loud cheers Sandy Pimenotispoke contin uing need carry forward spirit friendship good will basis Free Flight competition spirit brought gether sportsmen 3 1 countries spirit carried away us FF Duration/Meuser Continued page 61 method solves problem Ribless construction revisited Febru ary 1980 column showed form ribless wing construction have used non-ribs simply stripwood insist undercamber simply Indoor-style uniformdepth sliced ribs similar scheme credited Harold Osborne apparently taken ancient model magazine popped up Scale News Views Osbornes design has differ ent twist see sketch sheet balsa used trailing edge set angle give undercamber effect means use quarterNavy Best Ducted Fans SKYRA Y Plan Farm Designed 8i11 Effinger Its Radio Control SKYRAY NAVY F4D1 ale Ducled Fan R/O RK-20 Fan Unit ong Plan Set ROOF-i $1995 Prices Complete Plans Sub Assembly Detailed Parts Lists Add $200 Mailing Tube Send Brochure Details new designs & great things come Send $100 refundable information sawn C-grain sheet plasticized dope avoid warps Non-ribs may zigzagged added stiffness Trick LG received sketch reproduced pull-pin device actuating retractable landing gear Count Pisana address same Bill Warners Bill either has rather classy house guests delusions gran deur pull-pin made music wire perhaps heavy monofilament fishing leader holds landing gear takeoff positionis secured terra firma appro priate length thread Counts application Embryo Endurance class model required take off table top Other applications come mind Rubber-Power Speed AMA Outdoor Rubber-Power Scale etc best check rules could considered dropping parts flight Allegedly drag Ys-in-wide leg fairing helps gear retract acts oar help row boat Non-climbing rubber hook revisited talking about devised Paul Mcllrath shown June issue Paul used such hooks models took SNART Indoor meet found hook wasnt always effective motor length approached twice hook spacing others longer motors werent having problems So asked several fliers especially long motors what kind hook using first used S-shape hook Paul says cant bend second used Pauls design third used either diamond-shape hook plain round hook usually notorious climbing So much science Perhaps impor tant factor kind rubber used way wind way hold mouth Walter Erbach reports nifty device trimming microfilm especially field after repairs Walt describes devices ectiny disposable battery-powered cauteries used physicians suppose wart removal like shaped like pencil flashlight operate two penlight cells Ive gotten local medical supply house no problem cost about six bucks shot under heavy current drain required heat tip fleshburning microfilm-melting temperature battery life short Although intended disposables anyone enough ingenuity build model plane can figure disembowel replace batteries neat alternative rechargeable batterypowered soldering pencil price about $20 theyre really recommended removing warts 1981 NFFS Symposium Report now available fourteenth Sympo report includes word Decembef 1981137 NEW FOURMOST PRODUCTS! FOURMOST RECOIL TUBING four foot length super-tough fuel-proof urethane tubing pro-formed FOUR-INCH COIL allows placement field box can convenient distance aircraft boat After use tubing will retract its earlier space-saving form price$3 95 WE HAVE THE ING TION ORsmall Size 3/32 IDPrice S2OO 1 Tee 1 Elbow 1 union 1 Plug 4040 24th Ave Forest Grove OR 97116 FO URMOST PROD UCTS Telenhone 503 357-2732 CARBON FIBER TAPE 005x 125 wide 25f-t5OftlOOft $895$1495$2695 p&h SLOPE ASSOCIATES 2317 n 63d SEATTLE 8103 Exec Hardy Brodersen Introduction Editor Bill Rennet Some Thoughts Designing Trimming Power Model Gil Moms Hunting Elusive Thermal Stan Mike Stoy Some Psychological As pects Model Competition William L Baker Determine Rubber-Powered Air plane Propeller Efficiencies John Gard Trim Thermalling William Baker Problem Winning Losing Andrew Bauer Structureless Foam Composite Construction Ron St Jean Up date High-Performance Airfoils Bruce Carmichael Tail Aspect Ratio Must Small Jean Wantzenreither Airfoil Data Model Aircrafta Book Review Bruce Carmichael Ten Years Hook Works Bob Hatschek stories about five NFFS Hall Fame awardees stories about the Ten Model Year awardees along drawings of models addition lists AMA Nats World Champs winners starting Year listing NFFS Model Year award-winning models since first awards 1970 handy reference tables contents 1 3 previous Sympo reports listed course Nakashima cartoons photos galore Prices $750 NFFS members nonUSA residents $850 others Postage Fourth Class anywhere world number copies $150 Order NFFS Plans Publications 4858 Moorpark Ave San Jose CA 95129 New products department following items have come attention P-30 Kit offered Campbells Custom Kits now offering kit Souper 30 conforming rules P-30 classsmallest Outdoor Rubber-Power competition classes Kit includes hardware 9-in plastic prop re quired rules pre-cut ribs tissue stripwood plans instruction rubber Price $1098 Extra-cost items offered spare prop $50 spare rubber motor $35 Jim Crocket CR102 winding hook $195 No 30 blast-proof winding tube winding wire $195 Other items offered Campbells include Outdoor Hand-Launch Glider kits regulation Payload dummy Campbells will custom-cut Free Flight kit plan production Address Box 5996 Lake Worth FL 33461 Phone 305 968-1045 Shipping $200 per order free orders $2500 Bob Meuser 4200 Gregory St Oaklan4 CA 94619 Santos-Dumont 1 4-bis/SrulI Continued page 68 no warps have crept wings Using pusher prop Tornado makes 8-6 try first test flights ROG However fly grass dirt field forward skid may provide too much drag reliable takeoffs case add small wheel l okay front skid look closely flight photos will notice pair small nose wheels model Once trimmed hand-launching will possible fly hard surface runway scale skid should satisfactory 4-bis will take off fly amazingly slow speed Stalls gentle may fly through noticin& speed drops slowly nose rises straight mushing descent begins Simply drop nose JET HAWK F-4 PHANTOM F-IS EAGLE HUNDERBIRD REVENGER T II TLAS BOOTLEGGER C Q 94ft ATOR ZLI -50 L LASEFINST-AKIN OBRA PATIG EJANI WCICKfMr RD RI NSW~III ATLAS BOOTL GGE OMPR ZLIN Z SOL LASER 20 3 LYING TIGER PLAN JAN t r Local Dealer Send $1 00 Catalog v Ar 138 Model Aviation f FUEL LINE PIPING PROBLEM Size 1 16 DPrice SI50LARGE 1 Tee 2 E bows Pen Bladder Tee Flying Near Airports Careful Free Flight Radio Control flying near airports situation might involve possibility models being vicinity full-scale aircraft operations must avoidedor conducted eliminate dangerous situations Models should flown proximity full-scale aircraft operations unless flyer has someone else him sole purpose watching full-scale aircraft supervising flying prevent accident possibilities PROTECT YOUR RIGHT TO FLY xr Or// UARE EAGLE P-30 hirsi Senior ens junior 1981 lets first end Second Open iSiS lets first ipen 1979 SSFFE IT oJIfS tome finest nnnlornfteo free flight kits youll ever see beginners ens experts 51205 pies tli5 snipping tetniog -BLUE RIDGE MODELS. BOX 429A SKYLANO N css~e
Edition: Model Aviation - 1981/12
Page Numbers: 60, 61, 137, 138
Fee Flight Duration Bob Meuser NOMINATIONS order NFFS Model Year Awards Free Flight Hall Fame Awards 1982 Suddenly its next year already Model Year awards presented annual ly outstanding models good track record competition award can given models dont meet criterion well non-models example Fulton Hungerfords tiny Ford Trimotor got award although could barely fly across room nevertheless outstanding example way-out facet Free Flight technology Old-Timer Pea nut Scale Pennyplane events subjects awards have Seeligtimer Rossi engine Send nominations Gil Graunke 15260 Heather Hill Dr Brooktjeld WI 53005 Hall Fame awards arepresentedto individu als have made noteworthy contribution Free Flight outstanding performance com petition some other way Send nomi nations J Italiano 1655 Revere Drive Brookfield WI 53005 Nominations can accepted up January 1 1982but wait Trick TE joints days yore simply glued Rib Trailing Edge B per instruc tions supplied hoped best remained blissful ignorance super-thick air foilsElifel 400 RAF-32nothing bad ever happened did always bad weather bad luck Devil himself blame later airfoils got thinner trailing edges seemed have minds own would bend up down according own preferences airfoil got airfoil intended clearly miracle Solutions evolved slotted TE tri angular gusset became alternate standards Lowshrink non-shrink gluescyanoacrylates ali phatics epoxieshelped too So needs solution solved problem Everybody thats solution involves compromises slot ting TE reduces its stiffness strength gussets weigh fancy-pants glues opposed plain old model airplane cement make smooth sanding difficult impossible solution presented came Ralph Preys Satellite reported Ed Hopkins used ex-FAI-power-team member Tom McLaughlan solution others has both advantages disadvantages solution illustrated lowermost three sketches What amounts simply piece round toothpick hors doeuvre pick glued appropriate hole TE also glued side rib weakens TE perhaps much slotting weighs perhaps much gusset requires some effort cut hors-doeuvre pick length drill hole glue place perhaps much slotting TE whacking out gussets Seredinsky airfoil recent issue Free Flight Digest NFFS included airfoil used Joe Foster highly successful Wakefield models first place US Team Selec tion Finals eighth place 1981 World Cham pionships based Seredinsky Flamingo airfoil misspelled itSaradensky Hank Cole took task would feel name Seredinsky someone called Saradensky followed some background foil replied name like Saridansky Id probably shoot myself name like Meuser nobody spells right bad enough live Thanks information Saridinski foil cor recting spelling sure feel lot better now can spell Saradinsky correctly Anyhow what Hank say about first saw airfoil section Journal Aeronautical Sciences May 1957 article Charwat Since no coordinates given enlarged drawing measured upper surfaces doubtful accuracy considering other modifications airfoil too bad result airfoil used 1964 Wakefield Also data Charwats paper used 1970 Symposium paper Selection Aspect Ratio Minimum Sinking Speed Nordic Glider last year found co ordinates Alfried Gymnichs DerModellflug Jahrbuch 195 3/1954 what Joe Foster used airfoil added favorite undercamber As far know nobody has guts use original Flamingo lower surface model believe used highaltitude compressors need structural strength new Wakefield am using 110 lower-surface angle see sketch think better minimum sink 70 used Joe lower surface gives faster glide good penetration probably better initial burst climb all-condition Wakefield think 70 best dead-air maximum time think 110 has potential idea behind lower surface Seredinsky foil apparently goes something like Design airfoil give desired charac teristics too thin structural requirements add spar lower surface Fair spar appropriate streamlining Tr effective spar its fairing must sufficiently small its effect flows over upper surface bulk /________________________ ii CoLe-To -&rcctinsliy Rather Exceptional Airfoil Das Flamingo-Profil Se-4410 vom Dipl-lng Seredinsky X025575 V27562574 l27262932 LEradius notspecified 101520 815931005 31526145 2530 1035104 0601 4050 10191 0515 6070809095 77562544235125 212150602 60 Model Aviation hank LoIe 1855 model first com petition flapper Its flaps trimmed up climb down glide 100 02 0 ozo mu5ic wires Ruer uavtd 1ZT IPotroftt 7 1uLt pin wid Bfairiv Count Pisanas tricky retract gearfor small models column upEnd ccj rib -Still another scheme ribless wing construction Wino Do~bLe-bcdc tctper Ku Scrndin3 block Its easierto sand dihedral angle HLG wing doesnt squirm around youre working Double-back carpet tape jigblock root-end bench works great lower surface minimal addition fairing must sufficient make drag spar acceptable Too much fairing resulting flatbottom foil example lose game main airstream entering leaving region airfoil must too myopic see blip lower surface best knowledge principle hasnt employed significant way competition Free Flight has potential Double-sided tape rescue Jerry Guiles writes ~After half-century sanding carving balsa wood goodness its wonder Trailb ed3c- TE rouirtd toothjnd set kokinT-f Two typicaland newmethods attaching ribs TE theres much left poor wing RBM discovered neat way hold section glider wing sanding dihedral angle ends joined Thanks product called double back tape can probably get carpet store can hold slippery rascal wing light fingertip pressure sketch tells story Double-stickum tape comes variety forms common being like either masking tape transparent cellophane tape goo both sides peel-off backing strip Sources include paint hardware department startionery stores Its good sorts stuff involving either permanently temporarily holding things together Ive used holding rib former templates balsa strip stuck workbench will keep small parts getting scattered hold small part glue something Back glider joint Some modelers use sandpaper taped work-surface double stickum tape course nonskid surface Some modelers hold wing against horizontal surface either eyeball correct sanding angle use auxiliary fixture guide sanding block correct angle Guiles Continued page 137 Dick Howard R liked MAs Ms Peach design much builtfour themall different scales Phyllis Warner Charlie Sink watch model winding stooge Local sexist joke No 1 Say can borrow winding stooge No 2 Nope sorry shes back theCampbells Custom Kits offer Souper 30 P-30 class model trailer making sandwichesyoung lady holding model Tara Campbell December1981 61 THE BEST IN GIANT SCALE Make Right Choice First Time ~QWrz 24 CuIn Suggested List $21995 Dealers Direct It,- 24 60110 a,ait a,i ma,oe atflC ae Sgs i,atte 0 oOC-iOOe Conoes Cane 00 ia Japan SOC ac Ii sesoo has eooCd 0 io olsiaoonqooooesoetoTOibs Use iOo,iaio ptn,m perloman e aye eiabito 5 acoas tCO0CS ooh iKo,ta COQoCs a, 32 HP infleCt SaP aesrinyn crank RoSier Saarnga a, ike Rod a,a Wophte 6 7/2 /5, NEW1 R M TITAN 43Culn 61/2HP $28995 MARINE KIORITZ complete recoil start er mount water-cooled head reccommended 48 to72 hullsN $18995Z Sold Direct Only -y Zinger Props20 24 diameter 10 1 6 pitched Exhaust Manifold Kltfits Kjoritz Kawasaki Ep others Velocity Stack Kit Kioritz Quadra Six-Bolt Prop Hub Quadra Special Length Prop Hubs Kiortz & other engines Kioritz Digital Tach Spark impulse triggered Rennet Muffler BElS Specialties Champion Plugs RCJ-8 resistor Belray MC-1 Synthetic Oil 112 oz 501 mis Call Write Fall Details $1000 300 1995 1995 5995 1795 250 295 TI, P M 0 i,so oil oat ,IowC-iOpC enanC ,,IeooSoo,WGeooaooti40sB12HPOI ,sosir, q ,oiopowea,lfeaioeShosiOail ,e00O500iS0C30tOl I,a~nqs o,nC rod ,l,-qoroo ease osraliaion Tflo 00 0 HO, CS Hops 10, 0 momo, 22, 2 re w,o 2416 PM 11,, 5 ,i,Oi SC Noseo ao, Zol sai,,is a,i olne t,ifl oelom oce ICsO,s Posseee 50 PM TI,, omes corn ole Wti 6-Poll poo hl cost olft,,,lCSSiOOlt5 sANDYVILLE OHIO R OUSH MPG Phone 216 866-9462 484-4374 organizers held meeting team managers agreed awards would accepted view circumstances further participation ceremonies would cut short remarkable World Cham pionships drew close Lothar Doring stand ing crutches received Wakefield Cup loud cheers Sandy Pimenotispoke contin uing need carry forward spirit friendship good will basis Free Flight competition spirit brought gether sportsmen 3 1 countries spirit carried away us FF Duration/Meuser Continued page 61 method solves problem Ribless construction revisited Febru ary 1980 column showed form ribless wing construction have used non-ribs simply stripwood insist undercamber simply Indoor-style uniformdepth sliced ribs similar scheme credited Harold Osborne apparently taken ancient model magazine popped up Scale News Views Osbornes design has differ ent twist see sketch sheet balsa used trailing edge set angle give undercamber effect means use quarterNavy Best Ducted Fans SKYRA Y Plan Farm Designed 8i11 Effinger Its Radio Control SKYRAY NAVY F4D1 ale Ducled Fan R/O RK-20 Fan Unit ong Plan Set ROOF-i $1995 Prices Complete Plans Sub Assembly Detailed Parts Lists Add $200 Mailing Tube Send Brochure Details new designs & great things come Send $100 refundable information sawn C-grain sheet plasticized dope avoid warps Non-ribs may zigzagged added stiffness Trick LG received sketch reproduced pull-pin device actuating retractable landing gear Count Pisana address same Bill Warners Bill either has rather classy house guests delusions gran deur pull-pin made music wire perhaps heavy monofilament fishing leader holds landing gear takeoff positionis secured terra firma appro priate length thread Counts application Embryo Endurance class model required take off table top Other applications come mind Rubber-Power Speed AMA Outdoor Rubber-Power Scale etc best check rules could considered dropping parts flight Allegedly drag Ys-in-wide leg fairing helps gear retract acts oar help row boat Non-climbing rubber hook revisited talking about devised Paul Mcllrath shown June issue Paul used such hooks models took SNART Indoor meet found hook wasnt always effective motor length approached twice hook spacing others longer motors werent having problems So asked several fliers especially long motors what kind hook using first used S-shape hook Paul says cant bend second used Pauls design third used either diamond-shape hook plain round hook usually notorious climbing So much science Perhaps impor tant factor kind rubber used way wind way hold mouth Walter Erbach reports nifty device trimming microfilm especially field after repairs Walt describes devices ectiny disposable battery-powered cauteries used physicians suppose wart removal like shaped like pencil flashlight operate two penlight cells Ive gotten local medical supply house no problem cost about six bucks shot under heavy current drain required heat tip fleshburning microfilm-melting temperature battery life short Although intended disposables anyone enough ingenuity build model plane can figure disembowel replace batteries neat alternative rechargeable batterypowered soldering pencil price about $20 theyre really recommended removing warts 1981 NFFS Symposium Report now available fourteenth Sympo report includes word Decembef 1981137 NEW FOURMOST PRODUCTS! FOURMOST RECOIL TUBING four foot length super-tough fuel-proof urethane tubing pro-formed FOUR-INCH COIL allows placement field box can convenient distance aircraft boat After use tubing will retract its earlier space-saving form price$3 95 WE HAVE THE ING TION ORsmall Size 3/32 IDPrice S2OO 1 Tee 1 Elbow 1 union 1 Plug 4040 24th Ave Forest Grove OR 97116 FO URMOST PROD UCTS Telenhone 503 357-2732 CARBON FIBER TAPE 005x 125 wide 25f-t5OftlOOft $895$1495$2695 p&h SLOPE ASSOCIATES 2317 n 63d SEATTLE 8103 Exec Hardy Brodersen Introduction Editor Bill Rennet Some Thoughts Designing Trimming Power Model Gil Moms Hunting Elusive Thermal Stan Mike Stoy Some Psychological As pects Model Competition William L Baker Determine Rubber-Powered Air plane Propeller Efficiencies John Gard Trim Thermalling William Baker Problem Winning Losing Andrew Bauer Structureless Foam Composite Construction Ron St Jean Up date High-Performance Airfoils Bruce Carmichael Tail Aspect Ratio Must Small Jean Wantzenreither Airfoil Data Model Aircrafta Book Review Bruce Carmichael Ten Years Hook Works Bob Hatschek stories about five NFFS Hall Fame awardees stories about the Ten Model Year awardees along drawings of models addition lists AMA Nats World Champs winners starting Year listing NFFS Model Year award-winning models since first awards 1970 handy reference tables contents 1 3 previous Sympo reports listed course Nakashima cartoons photos galore Prices $750 NFFS members nonUSA residents $850 others Postage Fourth Class anywhere world number copies $150 Order NFFS Plans Publications 4858 Moorpark Ave San Jose CA 95129 New products department following items have come attention P-30 Kit offered Campbells Custom Kits now offering kit Souper 30 conforming rules P-30 classsmallest Outdoor Rubber-Power competition classes Kit includes hardware 9-in plastic prop re quired rules pre-cut ribs tissue stripwood plans instruction rubber Price $1098 Extra-cost items offered spare prop $50 spare rubber motor $35 Jim Crocket CR102 winding hook $195 No 30 blast-proof winding tube winding wire $195 Other items offered Campbells include Outdoor Hand-Launch Glider kits regulation Payload dummy Campbells will custom-cut Free Flight kit plan production Address Box 5996 Lake Worth FL 33461 Phone 305 968-1045 Shipping $200 per order free orders $2500 Bob Meuser 4200 Gregory St Oaklan4 CA 94619 Santos-Dumont 1 4-bis/SrulI Continued page 68 no warps have crept wings Using pusher prop Tornado makes 8-6 try first test flights ROG However fly grass dirt field forward skid may provide too much drag reliable takeoffs case add small wheel l okay front skid look closely flight photos will notice pair small nose wheels model Once trimmed hand-launching will possible fly hard surface runway scale skid should satisfactory 4-bis will take off fly amazingly slow speed Stalls gentle may fly through noticin& speed drops slowly nose rises straight mushing descent begins Simply drop nose JET HAWK F-4 PHANTOM F-IS EAGLE HUNDERBIRD REVENGER T II TLAS BOOTLEGGER C Q 94ft ATOR ZLI -50 L LASEFINST-AKIN OBRA PATIG EJANI WCICKfMr RD RI NSW~III ATLAS BOOTL GGE OMPR ZLIN Z SOL LASER 20 3 LYING TIGER PLAN JAN t r Local Dealer Send $1 00 Catalog v Ar 138 Model Aviation f FUEL LINE PIPING PROBLEM Size 1 16 DPrice SI50LARGE 1 Tee 2 E bows Pen Bladder Tee Flying Near Airports Careful Free Flight Radio Control flying near airports situation might involve possibility models being vicinity full-scale aircraft operations must avoidedor conducted eliminate dangerous situations Models should flown proximity full-scale aircraft operations unless flyer has someone else him sole purpose watching full-scale aircraft supervising flying prevent accident possibilities PROTECT YOUR RIGHT TO FLY xr Or// UARE EAGLE P-30 hirsi Senior ens junior 1981 lets first end Second Open iSiS lets first ipen 1979 SSFFE IT oJIfS tome finest nnnlornfteo free flight kits youll ever see beginners ens experts 51205 pies tli5 snipping tetniog -BLUE RIDGE MODELS. BOX 429A SKYLANO N css~e