Piotr LUCKY 14 approach precision aero batics control-line model year 1978 very good season Model 14 victories allimportant contests Poland best stunter Polish team international competition Czestochowa / Champs Socialist Countries Cup Sofia / Bulgaria Only Poland National Championships got second placevice-champion Poland 1978 Thus after lucky 78 season named Model 14 Lucky 14 Designing After 1977 season got third place Nats Poland started design new model 1978the 14th series Model 13 opinion too large wing areaabout 750 sq infor old Fox 40 Stunt sol reduced wing size about 700 sq model would have maximum weight about 50 ounces complete because Fox 40 very good engine already very old powerful new new airfoil sections would about 20% thick flaps tip root maximum wing thickness point about 35% chord flaps based work three airfoils NACA 0018 Saftig Epler designed own airfoil sections varying root tip blunt leading edges like model flies slowly softly designed fuselage long old Model 13the model long fuselage less nervous windy weather Construction Construction quite simple assumed interested building Lucky 14 competent modelers detailed instructions needed own thing build what assembly like first always build control system firstbellcrank horns pushrods leadout wires work must done precisely control system must work very easily gaps between control surfaces fixed areas plan will see three versions flap horns flew first version horns March April 1978 damaged Lucky 14 test flight changed flap homs differential second version model twisted very heavily square maneuvers changed horn once 1 1 ratio third version Thus found ratio best casethe maximum 38 Model Aviation Top Superficially least non-stunt fliers eye such machines appear less standard really good ones embody special variations conceptual theme per miffing fine-tuned performance meet exacting demands Author above son gets across simple feeling language dO//dee 6006 64/os/able LA 1/16 AL Plate WOs/e/-sa/de 1/32 S/eel doase Toeee Or/boond Wing / 3/A Sr/or/leo IrA WeAr/I 11/20 6131/6 noOl /6/21/15/ 4/rob Sec/inc//s ol LUCKY/S 6/2 Shall Po/ensee 2/sod/a /1/6 Ply /22//2e/A609/0 6/0/00 B/ole 2I-V---1TT7V Hdd3/32S//6Pne31W B//ca4-z--s-zz II 1/1660/50I il/BAO/SO II2nd /0 /2/fl 6/2Id/I6/0IRA Rd167106 dS666 XL 8 SloedIB- heel P/ape in/GoonL HinngeS/1650 767 0/23A56769/01//2/3/6/5620/0 P/dAd SI Veodran odoo/sinde 2nd Ver/OrOr 33 Vd/SrOO 787 3/325/ee/W/e /60 P36 P3d FAA ] nrA PS 4/VT r03/32WeI/Id S/eel/Ad/h sindeel 6 3/32Pin0na Wre /16/IA/B 1/A Ply VinflCCfl0fl/pinOOO POLAND LUCKY 14 Oesrgored Ooeorr-orkedby Piotr Zowado angles belicrank flaps elevator equal 40 degrees As always cut bellcrank 1/16 steel 1 2 proportion have control system can build wing wing simple modelers have written about type descriptions models thing always very important mounting belicrank inside wing because whole model 4hangson during its flightand pull-tests mounting bellcrank must done very exactly strongly Later make stabilizer mount horns join stab wing horns pushrod make fuselage first cut mounting sheet engine piece X 2 maple about 14 inches long use about 3 degrees engine right-thrust fuselage sides laminated 1/32 X 3 X 14 plywood doublers glued form piece side views left right fuselage sides use wet molding technique get oval section sides soaked warm water sufficiently pliable fastened molding board left few days thoroughly dry Out fuselage sides permanently shaped assembly Now cut holes wing stab mount model piece glue top bottom nose-ring hollow block add cockpit details canopy rest work very simple aircraft now ready finish can use type finish like cover entire plane two coats clear dope sand coat plane Japanese tissue wing double cover Finally cover four five coats clear dope allowing 24 hours drying time between coat course sand coat dope using number 280 first 400 last model painted well could covering coat paint prefer polyurethane semi-matte lacquers little bit too heavy Engine Fuel Tank Lucky l4is powered hard obtain like too glossy covering old Fox 40 Stunt 11 X 4 11 X 5 modelsthe real airplanes dont have too props own design make good much gloss hurry painting Work light engine stunt models runs very slowly exactly Nobody likes good Continued page 108 May 1980 39 /2 jlTflne00Zi.-v I6G/oejjf J F w CD w w Cd w -J -J z -J w N Cl -J UEnginne POX 005/or/I 76/7 Sr/AIr Ee/efls/r/ TAnk-S d P0//er Type or/fl loessooc el/lAO/roe 06/200 1/150/6/A r/sde l/AM0A0 drerde / 0 2 /6 flee Front endclunmcespecmally wnai appears ou rumovaume gear Zawada transfers hisfrom ship ship turning 1 1 x 414 5 homemade propseven 12 diameters 4oz Palmer4ype tank muffler pressurized F@RECATOR MOLD YOUR OWN PARTS FOR PLANES BOATS CARS ETC w -w $4995 Instructions assembly & use included $39 Includes A8St Pack ABS ID PREPAID dealer order directUS ONLY Vacuum former plastics Easyto make own Cowls wheel pants Canopies etc works home oven hose type vacuum Cleaner Qualified Dealer Inquiries Invited PLA8TICBuIk Packs ABS PI.tjo Sheet Fornicede sheets 8th 17 Packs Only PCSPACK THICKNESSPER PACKPRICE 0201/50 500 030 1/32 00 045 3/64 00 0601/16 00 090 3/32 00 AssortmentPack see below1500 Asofln, PerkeerIe/os 0-020/4-030/3- 040 2 060/ Sod 1050 shelr doe perk $1500 soOn, ordered ,itl th* FOr,icror AlAS ned/tn Over 3 lbs per pock Idea Development Inc Box 7399 rk Delaware 19711 AEROBATIC AIRPLANES BY ROST C MORRISON .I IS SUPERB DRAWINGS 8395 PLUS ..L SOW POSTA~ CATALOGS ~k-TECN III $100Ocean rule Ken riwy VIOA CR6005 60466 shell skin varying thickness being thicker front landing gear wing engine imposed large loads assembled shells reinforced internal rings longitudinals joined together produce alight strong efficient fuselage good fuselage shell could molded same way would require far too much work making mold reinforcing shells Planking reasonable choice will bit differently however relying less thick balsa technique will start repeating some shell techniques steps already described first step produce side view accurate cross sections stress location such wing spar firewall landing gear attach ment stations Other intermediate cross sections will needed produce good form perhaps reinforce hand-launching grip zone Set up top bottom outline strips drawing erect half bulkheads just done sheet shell assembly Again accurate bulkhead edges will meet join shells mated together Since both halves should identical will use fairing strips find contour changes corrections needed half bulkheads first half shell will correct other halves match Now lay single 16 stringer front rear along hori zontal outer belt line should notch flush bulkheads problem planking fuselage boat hull planks must narrower get smaller sections boat builder has technique calls spilingused establish taper necessary Spiling would very difficult tedious model work tackle problem another way need make long gently-curved taper planks allow change fuselage circum ference will cut curves straightedge Four 1/16 highjigging blocks will cemented cutting board 5/16 X 1/16 strip forced curve blocks straight line cut will become curve strip allowed unbend straight cut made blade several degrees off vertical will bevel edge curved edge can assist getting good edge joint Fig 1 shows layout ofjigging blocks used 1/12 scale Lockheed Vega largest semi-circumference fuselage example 5 expect use -wide planks will 20 planks required However small end has semi-circumference 1 planks must taper 1/16 wide end arithmetic useful accuracy size up producing perfect matching will still have make adjustment last two planks Proceed center line belt line stringer making sure no cement squeezeout interfere next plank Add plank side belt line alternating above below watching progress covering shell fore aft will probably necessary change block spacing cutting jig adjust plank taper final plank does perfectly fill remaining gap top bottom stringer dont worry three-quarters skin place shell can lifted off board tailored plank can placed Lucky 14/Zawada continued page 39 well large propellerseven 11 12 inches diameter use old type Palmer 4-ounce tank pressure silencerthe orifice about 1/16 tank inch deep fuel pick center mounted about 1/16 above spray bar engine Thanks engine runs little faster inverted flight helps little some maneuvers Flying first few flights should made calm light wind regulate height fuel-tank placement spray bar engine speed model straight flight maneuvers different props model must fly slowly lap times around 56 seconds 67-ft lines lap times inverted flight around 54 seconds engine runs must maximum model flies upward two cycle must change runs quickly four cycles model flies downward regulate leadout lines best point during square maneuvers Future Plans course 1980 World Championships Poland next model Lucky 15 1979 season hope will luckier still being made similar dimensions Lucky 14 new airfoil sections own design greater maximum thickness because model will powered 5T46 include airfoil sections plan tail plane will made like tail plane Stiletto 660 Les McDonald stab covered 1/16 balsa Ifyou should have questions ideas about Lucky 14 feel free write care editor CL Aerobatics/Paul continued page 40 founding father Aero Modelers Association Northern California later became WAMWestern Associated Modelers wrote up new set rules Stunt basically same rules being used Northern California occurred fall 1948 early 1949 Accordingto correspondence Roy Mayes little foggy dates much correspondence records 40s destroyed fire Regardless whether new pattern first used 1948 49 Roy introduced some new ideas 1 eight-minute time limit 2 three attempts make two official flights 3 old controversial item appearance points 4 flight pattern points WAM appearance points quite heavy could amount something like 25% total score Roy explained appearance points letters After seeing old time free flight gas models changed semi-realistic models thingies same thing happening Round-the-Pole race cars determined keep same thing happening control line 1949 rules included following sequence starting takeoff level flight climb dive wingover five consecutive inside lpsfive con secutive outside 1oops inverted flight three horizontal figure eights vertical figure eight overhead figure eight square 1oop special ma neuver must described detail judges prior flight landing Appearance points 8 80 1951 special maneuver dropped pattern Otherwise pattern same 51 52 5 l-52 pattern used time old time stunt According rule book 1953 pattern 108 Model Aviation *A COLORFUL * t ** * R AIRPLANE KIT * * Contents4 oIotuI Sheets4-Desians *Folding ineiroctions sWoights Send $200 Pius 50$ Postage Check MO pa Kit laBs 23 wks deliesni HEF Enterprise 7118 Sse,nit Rd. DaIenIII50559
Edition: Model Aviation - 1980/05
Page Numbers: 38, 39, 108
Piotr LUCKY 14 approach precision aero batics control-line model year 1978 very good season Model 14 victories allimportant contests Poland best stunter Polish team international competition Czestochowa / Champs Socialist Countries Cup Sofia / Bulgaria Only Poland National Championships got second placevice-champion Poland 1978 Thus after lucky 78 season named Model 14 Lucky 14 Designing After 1977 season got third place Nats Poland started design new model 1978the 14th series Model 13 opinion too large wing areaabout 750 sq infor old Fox 40 Stunt sol reduced wing size about 700 sq model would have maximum weight about 50 ounces complete because Fox 40 very good engine already very old powerful new new airfoil sections would about 20% thick flaps tip root maximum wing thickness point about 35% chord flaps based work three airfoils NACA 0018 Saftig Epler designed own airfoil sections varying root tip blunt leading edges like model flies slowly softly designed fuselage long old Model 13the model long fuselage less nervous windy weather Construction Construction quite simple assumed interested building Lucky 14 competent modelers detailed instructions needed own thing build what assembly like first always build control system firstbellcrank horns pushrods leadout wires work must done precisely control system must work very easily gaps between control surfaces fixed areas plan will see three versions flap horns flew first version horns March April 1978 damaged Lucky 14 test flight changed flap homs differential second version model twisted very heavily square maneuvers changed horn once 1 1 ratio third version Thus found ratio best casethe maximum 38 Model Aviation Top Superficially least non-stunt fliers eye such machines appear less standard really good ones embody special variations conceptual theme per miffing fine-tuned performance meet exacting demands Author above son gets across simple feeling language dO//dee 6006 64/os/able LA 1/16 AL Plate WOs/e/-sa/de 1/32 S/eel doase Toeee Or/boond Wing / 3/A Sr/or/leo IrA WeAr/I 11/20 6131/6 noOl /6/21/15/ 4/rob Sec/inc//s ol LUCKY/S 6/2 Shall Po/ensee 2/sod/a /1/6 Ply /22//2e/A609/0 6/0/00 B/ole 2I-V---1TT7V Hdd3/32S//6Pne31W B//ca4-z--s-zz II 1/1660/50I il/BAO/SO II2nd /0 /2/fl 6/2Id/I6/0IRA Rd167106 dS666 XL 8 SloedIB- heel P/ape in/GoonL HinngeS/1650 767 0/23A56769/01//2/3/6/5620/0 P/dAd SI Veodran odoo/sinde 2nd Ver/OrOr 33 Vd/SrOO 787 3/325/ee/W/e /60 P36 P3d FAA ] nrA PS 4/VT r03/32WeI/Id S/eel/Ad/h sindeel 6 3/32Pin0na Wre /16/IA/B 1/A Ply VinflCCfl0fl/pinOOO POLAND LUCKY 14 Oesrgored Ooeorr-orkedby Piotr Zowado angles belicrank flaps elevator equal 40 degrees As always cut bellcrank 1/16 steel 1 2 proportion have control system can build wing wing simple modelers have written about type descriptions models thing always very important mounting belicrank inside wing because whole model 4hangson during its flightand pull-tests mounting bellcrank must done very exactly strongly Later make stabilizer mount horns join stab wing horns pushrod make fuselage first cut mounting sheet engine piece X 2 maple about 14 inches long use about 3 degrees engine right-thrust fuselage sides laminated 1/32 X 3 X 14 plywood doublers glued form piece side views left right fuselage sides use wet molding technique get oval section sides soaked warm water sufficiently pliable fastened molding board left few days thoroughly dry Out fuselage sides permanently shaped assembly Now cut holes wing stab mount model piece glue top bottom nose-ring hollow block add cockpit details canopy rest work very simple aircraft now ready finish can use type finish like cover entire plane two coats clear dope sand coat plane Japanese tissue wing double cover Finally cover four five coats clear dope allowing 24 hours drying time between coat course sand coat dope using number 280 first 400 last model painted well could covering coat paint prefer polyurethane semi-matte lacquers little bit too heavy Engine Fuel Tank Lucky l4is powered hard obtain like too glossy covering old Fox 40 Stunt 11 X 4 11 X 5 modelsthe real airplanes dont have too props own design make good much gloss hurry painting Work light engine stunt models runs very slowly exactly Nobody likes good Continued page 108 May 1980 39 /2 jlTflne00Zi.-v I6G/oejjf J F w CD w w Cd w -J -J z -J w N Cl -J UEnginne POX 005/or/I 76/7 Sr/AIr Ee/efls/r/ TAnk-S d P0//er Type or/fl loessooc el/lAO/roe 06/200 1/150/6/A r/sde l/AM0A0 drerde / 0 2 /6 flee Front endclunmcespecmally wnai appears ou rumovaume gear Zawada transfers hisfrom ship ship turning 1 1 x 414 5 homemade propseven 12 diameters 4oz Palmer4ype tank muffler pressurized F@RECATOR MOLD YOUR OWN PARTS FOR PLANES BOATS CARS ETC w -w $4995 Instructions assembly & use included $39 Includes A8St Pack ABS ID PREPAID dealer order directUS ONLY Vacuum former plastics Easyto make own Cowls wheel pants Canopies etc works home oven hose type vacuum Cleaner Qualified Dealer Inquiries Invited PLA8TICBuIk Packs ABS PI.tjo Sheet Fornicede sheets 8th 17 Packs Only PCSPACK THICKNESSPER PACKPRICE 0201/50 500 030 1/32 00 045 3/64 00 0601/16 00 090 3/32 00 AssortmentPack see below1500 Asofln, PerkeerIe/os 0-020/4-030/3- 040 2 060/ Sod 1050 shelr doe perk $1500 soOn, ordered ,itl th* FOr,icror AlAS ned/tn Over 3 lbs per pock Idea Development Inc Box 7399 rk Delaware 19711 AEROBATIC AIRPLANES BY ROST C MORRISON .I IS SUPERB DRAWINGS 8395 PLUS ..L SOW POSTA~ CATALOGS ~k-TECN III $100Ocean rule Ken riwy VIOA CR6005 60466 shell skin varying thickness being thicker front landing gear wing engine imposed large loads assembled shells reinforced internal rings longitudinals joined together produce alight strong efficient fuselage good fuselage shell could molded same way would require far too much work making mold reinforcing shells Planking reasonable choice will bit differently however relying less thick balsa technique will start repeating some shell techniques steps already described first step produce side view accurate cross sections stress location such wing spar firewall landing gear attach ment stations Other intermediate cross sections will needed produce good form perhaps reinforce hand-launching grip zone Set up top bottom outline strips drawing erect half bulkheads just done sheet shell assembly Again accurate bulkhead edges will meet join shells mated together Since both halves should identical will use fairing strips find contour changes corrections needed half bulkheads first half shell will correct other halves match Now lay single 16 stringer front rear along hori zontal outer belt line should notch flush bulkheads problem planking fuselage boat hull planks must narrower get smaller sections boat builder has technique calls spilingused establish taper necessary Spiling would very difficult tedious model work tackle problem another way need make long gently-curved taper planks allow change fuselage circum ference will cut curves straightedge Four 1/16 highjigging blocks will cemented cutting board 5/16 X 1/16 strip forced curve blocks straight line cut will become curve strip allowed unbend straight cut made blade several degrees off vertical will bevel edge curved edge can assist getting good edge joint Fig 1 shows layout ofjigging blocks used 1/12 scale Lockheed Vega largest semi-circumference fuselage example 5 expect use -wide planks will 20 planks required However small end has semi-circumference 1 planks must taper 1/16 wide end arithmetic useful accuracy size up producing perfect matching will still have make adjustment last two planks Proceed center line belt line stringer making sure no cement squeezeout interfere next plank Add plank side belt line alternating above below watching progress covering shell fore aft will probably necessary change block spacing cutting jig adjust plank taper final plank does perfectly fill remaining gap top bottom stringer dont worry three-quarters skin place shell can lifted off board tailored plank can placed Lucky 14/Zawada continued page 39 well large propellerseven 11 12 inches diameter use old type Palmer 4-ounce tank pressure silencerthe orifice about 1/16 tank inch deep fuel pick center mounted about 1/16 above spray bar engine Thanks engine runs little faster inverted flight helps little some maneuvers Flying first few flights should made calm light wind regulate height fuel-tank placement spray bar engine speed model straight flight maneuvers different props model must fly slowly lap times around 56 seconds 67-ft lines lap times inverted flight around 54 seconds engine runs must maximum model flies upward two cycle must change runs quickly four cycles model flies downward regulate leadout lines best point during square maneuvers Future Plans course 1980 World Championships Poland next model Lucky 15 1979 season hope will luckier still being made similar dimensions Lucky 14 new airfoil sections own design greater maximum thickness because model will powered 5T46 include airfoil sections plan tail plane will made like tail plane Stiletto 660 Les McDonald stab covered 1/16 balsa Ifyou should have questions ideas about Lucky 14 feel free write care editor CL Aerobatics/Paul continued page 40 founding father Aero Modelers Association Northern California later became WAMWestern Associated Modelers wrote up new set rules Stunt basically same rules being used Northern California occurred fall 1948 early 1949 Accordingto correspondence Roy Mayes little foggy dates much correspondence records 40s destroyed fire Regardless whether new pattern first used 1948 49 Roy introduced some new ideas 1 eight-minute time limit 2 three attempts make two official flights 3 old controversial item appearance points 4 flight pattern points WAM appearance points quite heavy could amount something like 25% total score Roy explained appearance points letters After seeing old time free flight gas models changed semi-realistic models thingies same thing happening Round-the-Pole race cars determined keep same thing happening control line 1949 rules included following sequence starting takeoff level flight climb dive wingover five consecutive inside lpsfive con secutive outside 1oops inverted flight three horizontal figure eights vertical figure eight overhead figure eight square 1oop special ma neuver must described detail judges prior flight landing Appearance points 8 80 1951 special maneuver dropped pattern Otherwise pattern same 51 52 5 l-52 pattern used time old time stunt According rule book 1953 pattern 108 Model Aviation *A COLORFUL * t ** * R AIRPLANE KIT * * Contents4 oIotuI Sheets4-Desians *Folding ineiroctions sWoights Send $200 Pius 50$ Postage Check MO pa Kit laBs 23 wks deliesni HEF Enterprise 7118 Sse,nit Rd. DaIenIII50559
Edition: Model Aviation - 1980/05
Page Numbers: 38, 39, 108
Piotr LUCKY 14 approach precision aero batics control-line model year 1978 very good season Model 14 victories allimportant contests Poland best stunter Polish team international competition Czestochowa / Champs Socialist Countries Cup Sofia / Bulgaria Only Poland National Championships got second placevice-champion Poland 1978 Thus after lucky 78 season named Model 14 Lucky 14 Designing After 1977 season got third place Nats Poland started design new model 1978the 14th series Model 13 opinion too large wing areaabout 750 sq infor old Fox 40 Stunt sol reduced wing size about 700 sq model would have maximum weight about 50 ounces complete because Fox 40 very good engine already very old powerful new new airfoil sections would about 20% thick flaps tip root maximum wing thickness point about 35% chord flaps based work three airfoils NACA 0018 Saftig Epler designed own airfoil sections varying root tip blunt leading edges like model flies slowly softly designed fuselage long old Model 13the model long fuselage less nervous windy weather Construction Construction quite simple assumed interested building Lucky 14 competent modelers detailed instructions needed own thing build what assembly like first always build control system firstbellcrank horns pushrods leadout wires work must done precisely control system must work very easily gaps between control surfaces fixed areas plan will see three versions flap horns flew first version horns March April 1978 damaged Lucky 14 test flight changed flap homs differential second version model twisted very heavily square maneuvers changed horn once 1 1 ratio third version Thus found ratio best casethe maximum 38 Model Aviation Top Superficially least non-stunt fliers eye such machines appear less standard really good ones embody special variations conceptual theme per miffing fine-tuned performance meet exacting demands Author above son gets across simple feeling language dO//dee 6006 64/os/able LA 1/16 AL Plate WOs/e/-sa/de 1/32 S/eel doase Toeee Or/boond Wing / 3/A Sr/or/leo IrA WeAr/I 11/20 6131/6 noOl /6/21/15/ 4/rob Sec/inc//s ol LUCKY/S 6/2 Shall Po/ensee 2/sod/a /1/6 Ply /22//2e/A609/0 6/0/00 B/ole 2I-V---1TT7V Hdd3/32S//6Pne31W B//ca4-z--s-zz II 1/1660/50I il/BAO/SO II2nd /0 /2/fl 6/2Id/I6/0IRA Rd167106 dS666 XL 8 SloedIB- heel P/ape in/GoonL HinngeS/1650 767 0/23A56769/01//2/3/6/5620/0 P/dAd SI Veodran odoo/sinde 2nd Ver/OrOr 33 Vd/SrOO 787 3/325/ee/W/e /60 P36 P3d FAA ] nrA PS 4/VT r03/32WeI/Id S/eel/Ad/h sindeel 6 3/32Pin0na Wre /16/IA/B 1/A Ply VinflCCfl0fl/pinOOO POLAND LUCKY 14 Oesrgored Ooeorr-orkedby Piotr Zowado angles belicrank flaps elevator equal 40 degrees As always cut bellcrank 1/16 steel 1 2 proportion have control system can build wing wing simple modelers have written about type descriptions models thing always very important mounting belicrank inside wing because whole model 4hangson during its flightand pull-tests mounting bellcrank must done very exactly strongly Later make stabilizer mount horns join stab wing horns pushrod make fuselage first cut mounting sheet engine piece X 2 maple about 14 inches long use about 3 degrees engine right-thrust fuselage sides laminated 1/32 X 3 X 14 plywood doublers glued form piece side views left right fuselage sides use wet molding technique get oval section sides soaked warm water sufficiently pliable fastened molding board left few days thoroughly dry Out fuselage sides permanently shaped assembly Now cut holes wing stab mount model piece glue top bottom nose-ring hollow block add cockpit details canopy rest work very simple aircraft now ready finish can use type finish like cover entire plane two coats clear dope sand coat plane Japanese tissue wing double cover Finally cover four five coats clear dope allowing 24 hours drying time between coat course sand coat dope using number 280 first 400 last model painted well could covering coat paint prefer polyurethane semi-matte lacquers little bit too heavy Engine Fuel Tank Lucky l4is powered hard obtain like too glossy covering old Fox 40 Stunt 11 X 4 11 X 5 modelsthe real airplanes dont have too props own design make good much gloss hurry painting Work light engine stunt models runs very slowly exactly Nobody likes good Continued page 108 May 1980 39 /2 jlTflne00Zi.-v I6G/oejjf J F w CD w w Cd w -J -J z -J w N Cl -J UEnginne POX 005/or/I 76/7 Sr/AIr Ee/efls/r/ TAnk-S d P0//er Type or/fl loessooc el/lAO/roe 06/200 1/150/6/A r/sde l/AM0A0 drerde / 0 2 /6 flee Front endclunmcespecmally wnai appears ou rumovaume gear Zawada transfers hisfrom ship ship turning 1 1 x 414 5 homemade propseven 12 diameters 4oz Palmer4ype tank muffler pressurized F@RECATOR MOLD YOUR OWN PARTS FOR PLANES BOATS CARS ETC w -w $4995 Instructions assembly & use included $39 Includes A8St Pack ABS ID PREPAID dealer order directUS ONLY Vacuum former plastics Easyto make own Cowls wheel pants Canopies etc works home oven hose type vacuum Cleaner Qualified Dealer Inquiries Invited PLA8TICBuIk Packs ABS PI.tjo Sheet Fornicede sheets 8th 17 Packs Only PCSPACK THICKNESSPER PACKPRICE 0201/50 500 030 1/32 00 045 3/64 00 0601/16 00 090 3/32 00 AssortmentPack see below1500 Asofln, PerkeerIe/os 0-020/4-030/3- 040 2 060/ Sod 1050 shelr doe perk $1500 soOn, ordered ,itl th* FOr,icror AlAS ned/tn Over 3 lbs per pock Idea Development Inc Box 7399 rk Delaware 19711 AEROBATIC AIRPLANES BY ROST C MORRISON .I IS SUPERB DRAWINGS 8395 PLUS ..L SOW POSTA~ CATALOGS ~k-TECN III $100Ocean rule Ken riwy VIOA CR6005 60466 shell skin varying thickness being thicker front landing gear wing engine imposed large loads assembled shells reinforced internal rings longitudinals joined together produce alight strong efficient fuselage good fuselage shell could molded same way would require far too much work making mold reinforcing shells Planking reasonable choice will bit differently however relying less thick balsa technique will start repeating some shell techniques steps already described first step produce side view accurate cross sections stress location such wing spar firewall landing gear attach ment stations Other intermediate cross sections will needed produce good form perhaps reinforce hand-launching grip zone Set up top bottom outline strips drawing erect half bulkheads just done sheet shell assembly Again accurate bulkhead edges will meet join shells mated together Since both halves should identical will use fairing strips find contour changes corrections needed half bulkheads first half shell will correct other halves match Now lay single 16 stringer front rear along hori zontal outer belt line should notch flush bulkheads problem planking fuselage boat hull planks must narrower get smaller sections boat builder has technique calls spilingused establish taper necessary Spiling would very difficult tedious model work tackle problem another way need make long gently-curved taper planks allow change fuselage circum ference will cut curves straightedge Four 1/16 highjigging blocks will cemented cutting board 5/16 X 1/16 strip forced curve blocks straight line cut will become curve strip allowed unbend straight cut made blade several degrees off vertical will bevel edge curved edge can assist getting good edge joint Fig 1 shows layout ofjigging blocks used 1/12 scale Lockheed Vega largest semi-circumference fuselage example 5 expect use -wide planks will 20 planks required However small end has semi-circumference 1 planks must taper 1/16 wide end arithmetic useful accuracy size up producing perfect matching will still have make adjustment last two planks Proceed center line belt line stringer making sure no cement squeezeout interfere next plank Add plank side belt line alternating above below watching progress covering shell fore aft will probably necessary change block spacing cutting jig adjust plank taper final plank does perfectly fill remaining gap top bottom stringer dont worry three-quarters skin place shell can lifted off board tailored plank can placed Lucky 14/Zawada continued page 39 well large propellerseven 11 12 inches diameter use old type Palmer 4-ounce tank pressure silencerthe orifice about 1/16 tank inch deep fuel pick center mounted about 1/16 above spray bar engine Thanks engine runs little faster inverted flight helps little some maneuvers Flying first few flights should made calm light wind regulate height fuel-tank placement spray bar engine speed model straight flight maneuvers different props model must fly slowly lap times around 56 seconds 67-ft lines lap times inverted flight around 54 seconds engine runs must maximum model flies upward two cycle must change runs quickly four cycles model flies downward regulate leadout lines best point during square maneuvers Future Plans course 1980 World Championships Poland next model Lucky 15 1979 season hope will luckier still being made similar dimensions Lucky 14 new airfoil sections own design greater maximum thickness because model will powered 5T46 include airfoil sections plan tail plane will made like tail plane Stiletto 660 Les McDonald stab covered 1/16 balsa Ifyou should have questions ideas about Lucky 14 feel free write care editor CL Aerobatics/Paul continued page 40 founding father Aero Modelers Association Northern California later became WAMWestern Associated Modelers wrote up new set rules Stunt basically same rules being used Northern California occurred fall 1948 early 1949 Accordingto correspondence Roy Mayes little foggy dates much correspondence records 40s destroyed fire Regardless whether new pattern first used 1948 49 Roy introduced some new ideas 1 eight-minute time limit 2 three attempts make two official flights 3 old controversial item appearance points 4 flight pattern points WAM appearance points quite heavy could amount something like 25% total score Roy explained appearance points letters After seeing old time free flight gas models changed semi-realistic models thingies same thing happening Round-the-Pole race cars determined keep same thing happening control line 1949 rules included following sequence starting takeoff level flight climb dive wingover five consecutive inside lpsfive con secutive outside 1oops inverted flight three horizontal figure eights vertical figure eight overhead figure eight square 1oop special ma neuver must described detail judges prior flight landing Appearance points 8 80 1951 special maneuver dropped pattern Otherwise pattern same 51 52 5 l-52 pattern used time old time stunt According rule book 1953 pattern 108 Model Aviation *A COLORFUL * t ** * R AIRPLANE KIT * * Contents4 oIotuI Sheets4-Desians *Folding ineiroctions sWoights Send $200 Pius 50$ Postage Check MO pa Kit laBs 23 wks deliesni HEF Enterprise 7118 Sse,nit Rd. DaIenIII50559