[7g AEROBATICS Wynn Paul WHERE did get present precision aero batics pattern anyway ask dont like overhead eights hourglass did ever get thought up madness Model Industry Association meeting February 1946 antecedent present Hobby Industry Association Meeting commit tee appointed AMA composed John Clemens Jim Walker Russ Weber Megow Models got together hotel room discuss rules Stunt John acting secretary aset rules drawn up Actually committee looking control line rules meeting specifically stunt fashion maneuvers fit planes engines time said John Clemens recently conversation writer published rules 1946 Nationals held Wichita KS contained following maneuvers 1 Precision overhead flight model held 25-ft diameter circle wheel touching spot landing 2 Aerobatics stall recovery wing over vertical dive inside loop outside loop inverted flight square loop pair spec tacles rolls full roll half roll Cuban eight Immelmann turn flying two planes once looping two planes once waltz formation shift following plane maneuvered over front ofand below leading plane reversed back original position 3 Novelty unassisted takeoff pick-up glider pick-up object release glider sign parachute laying smoke screen retract landing gear carrier flight hand launch using U-Reely control fly out 70 feet reel model back hand touching ground dive bombing bomb must land within 10 feet target balloon burstinglst 2nd 3rd attacks motor control multiple motor operation 12 points six motors remote control model flown outside flight circle must take off complete least five laps land nose-over about group maneuvers foam winged super-trick stunter 80s no appearance points first year stunt Total possible points 292 Open stunt first year won R H Roof Tulsa OK 56 points flying seven-ft wingspan Taylorcraft Forster 99 engine However sensation Nationals barefoot boy named Davis Slagle Burbank California scored 102 points Junior Davis did fly two planes once among other tricks also won Walker Cup trophy initial year its existence Unfortunately several versions Walker Cup originally awarded have written Davis never received answer pattern stayed same 1947 Davis Slagle again won Walker Cup Junior stunt 1355 points Robert Tucker Elizabeth NJ won Open 102 points fol lowed J C Madman Yates John E Clemens have copy rules 1948 must have some changes scores significantly higher Jim Saftig won Open 3825 Davis Slagle won Junior again 3645 Slagle won Walker Cup again knew Jim Walker marvelous abilities fly anything wings can recognize initial Stunt pattern reflected influence made up maneuvers specialized However request AMA Roy E Mayes California Continued page 108 PIus 20 handiworkof Neal Thompson Mansfield MA enlarged Nobler design 20% Super Tigre 46 Craft has foam wing 40 Model Aviation Excellent detail Ted Fanchers Excitation 79 Nationals Larry Kruse photo Frank McMillan Bellevue NE holds Impulse Craft has foam wing powered OS Max 40 engine 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 changed appearance points range 21 77 reverse wingover maneuver added addition wingover Inside loops cut three inverted flight repositioned just after inside loops know procedure today Outside round loops started inverted flight three done square loop maneuver moved follow outside round loops followed horizontal eights vertical eights overhead eights new maneuver destined nemesis square eight rules cycle kept pattern same 1954 rules cycle 1955-56 according copy rule book sent Bill Netzeband changed appearance points range 3 24 triangle figure added time spring 1957 George Aldrich asked Carl Wheeley AMA work over stunt rules According recent conversa tion George remember memories 23 years ago made scores range 0 40 however through printing editing error scores came out rule book 10-40 maneuvers except landing George said tried couple years get 10-40 changed back original 0-40 couldnt get rules altered also know 57 pattern added hourglass figure four leaf clover George said got idea four leaf clover pattern used old New York Mirror Meet hourglass Georges idea tri angular vertical eight doesnt remember named figure hourglass does remember Bill Netzeband wrote him showing maneuver couldnt done written described rule book Someone Europe finally wrote description hourglass could actually performed George also changed appearance points maximum 40 Aldrich pattern stayed effect until appearance points changed 74-75 rules cycle Also 76-77 rules cycle allowed contestants use backup model case crash equipment failure Because space etc have left Out some sublime points such pull testing descrip tion maneuvers 45 60 degrees instance some other information idea present development pattern first Nationals information stunt PAMPA contact Wynn Paul 1640 Maywick Dr Lexington KY 40504 CL Scale/Gretz continued page 41 absolute full high throttle gear would stay up until throttle moved back down about * SERVO REvERSAL sWITCHES-With just flip asruitch serco ttavel direction four primary channels can reversed * INDEPENDENT THROW ADJU5T-Ou chotroels thr amount servo travel coo con rrolled udependently * FIFTH CHANNEL ADJUSTServo pouttion etracr switch either rhe Up Down poritioo independently adjustable * TRIM LOCATION VARIABLESTIre locuriun trims us builders discretion yoo cue have standard trim otossed trim oe comhinasiou two * TRIM AUTHORITY PROGRAMMABILITY-By nhaugtng plug-in fined resistors amount servo incursion olsen trims meved progeammable * DUAL RATE--Switches adjustment puss see fuotished peovide DUAL RATE up three channels nAs EXPONENTIAL RATE OPTIONThis plug-in option pronides non-litteot servo ttuoel te latiun stich movement up Ibme channels St 795 ELECTRONIC MIXER OPTIONWith plug-in module nny two functions can c tether nishee uni-dinectiunully ur bi-directinnally St 195 PROGRAMMABLE PUSH BUTTON OPTION-In-fliglrt adjustable 4pee-pengeammed onetrol nurface munemert may obtained push ing button Sf95 THE SILVER SEVEN $281195 Full ni Cd system kit receiver four servos cleeh mish puce Ace dealee meite cull foe complete details crws Complete Ceealogr $100 ladd S 550 foe 1st CIa Mail retinusol Box 511 E 119W 19th Higginsville Mo 64037 816 584-7121 1/3 speed Any degree power between full high down regardless whether engine 1/3 could used cruising flight running anywhere full idle just short bringing gear down other hand once absolute high Only throttle held gear brought down would stay firmly absolute full high throttle would gear May 1980 109 Inexpensive key word ACES new line R/C kits called Silver Series line offers unique combination value soda wide range versatility found todays RIC market until now cutting out biggest cotts Labor furnith kit furnish labor allows us give Eopquality product inexpensive price comparable $800 radios some ita features Ed Robinson tookan Enya 60 Dave PlattT-25 kitand producedtnls beautiful machine Ed Yonkers NY flies CL Sport Scale wing flaps operate Aero Gloss paints used finish model Bill Boss photo Fairey Firefly model creation o tynolds Albuquerque NM real ones used Royal Navy WW2 fighter reconnaissance aircraft Model has 40 power Bill Pepin photo
Edition: Model Aviation - 1980/05
Page Numbers: 40, 108, 109
[7g AEROBATICS Wynn Paul WHERE did get present precision aero batics pattern anyway ask dont like overhead eights hourglass did ever get thought up madness Model Industry Association meeting February 1946 antecedent present Hobby Industry Association Meeting commit tee appointed AMA composed John Clemens Jim Walker Russ Weber Megow Models got together hotel room discuss rules Stunt John acting secretary aset rules drawn up Actually committee looking control line rules meeting specifically stunt fashion maneuvers fit planes engines time said John Clemens recently conversation writer published rules 1946 Nationals held Wichita KS contained following maneuvers 1 Precision overhead flight model held 25-ft diameter circle wheel touching spot landing 2 Aerobatics stall recovery wing over vertical dive inside loop outside loop inverted flight square loop pair spec tacles rolls full roll half roll Cuban eight Immelmann turn flying two planes once looping two planes once waltz formation shift following plane maneuvered over front ofand below leading plane reversed back original position 3 Novelty unassisted takeoff pick-up glider pick-up object release glider sign parachute laying smoke screen retract landing gear carrier flight hand launch using U-Reely control fly out 70 feet reel model back hand touching ground dive bombing bomb must land within 10 feet target balloon burstinglst 2nd 3rd attacks motor control multiple motor operation 12 points six motors remote control model flown outside flight circle must take off complete least five laps land nose-over about group maneuvers foam winged super-trick stunter 80s no appearance points first year stunt Total possible points 292 Open stunt first year won R H Roof Tulsa OK 56 points flying seven-ft wingspan Taylorcraft Forster 99 engine However sensation Nationals barefoot boy named Davis Slagle Burbank California scored 102 points Junior Davis did fly two planes once among other tricks also won Walker Cup trophy initial year its existence Unfortunately several versions Walker Cup originally awarded have written Davis never received answer pattern stayed same 1947 Davis Slagle again won Walker Cup Junior stunt 1355 points Robert Tucker Elizabeth NJ won Open 102 points fol lowed J C Madman Yates John E Clemens have copy rules 1948 must have some changes scores significantly higher Jim Saftig won Open 3825 Davis Slagle won Junior again 3645 Slagle won Walker Cup again knew Jim Walker marvelous abilities fly anything wings can recognize initial Stunt pattern reflected influence made up maneuvers specialized However request AMA Roy E Mayes California Continued page 108 PIus 20 handiworkof Neal Thompson Mansfield MA enlarged Nobler design 20% Super Tigre 46 Craft has foam wing 40 Model Aviation Excellent detail Ted Fanchers Excitation 79 Nationals Larry Kruse photo Frank McMillan Bellevue NE holds Impulse Craft has foam wing powered OS Max 40 engine 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 changed appearance points range 21 77 reverse wingover maneuver added addition wingover Inside loops cut three inverted flight repositioned just after inside loops know procedure today Outside round loops started inverted flight three done square loop maneuver moved follow outside round loops followed horizontal eights vertical eights overhead eights new maneuver destined nemesis square eight rules cycle kept pattern same 1954 rules cycle 1955-56 according copy rule book sent Bill Netzeband changed appearance points range 3 24 triangle figure added time spring 1957 George Aldrich asked Carl Wheeley AMA work over stunt rules According recent conversa tion George remember memories 23 years ago made scores range 0 40 however through printing editing error scores came out rule book 10-40 maneuvers except landing George said tried couple years get 10-40 changed back original 0-40 couldnt get rules altered also know 57 pattern added hourglass figure four leaf clover George said got idea four leaf clover pattern used old New York Mirror Meet hourglass Georges idea tri angular vertical eight doesnt remember named figure hourglass does remember Bill Netzeband wrote him showing maneuver couldnt done written described rule book Someone Europe finally wrote description hourglass could actually performed George also changed appearance points maximum 40 Aldrich pattern stayed effect until appearance points changed 74-75 rules cycle Also 76-77 rules cycle allowed contestants use backup model case crash equipment failure Because space etc have left Out some sublime points such pull testing descrip tion maneuvers 45 60 degrees instance some other information idea present development pattern first Nationals information stunt PAMPA contact Wynn Paul 1640 Maywick Dr Lexington KY 40504 CL Scale/Gretz continued page 41 absolute full high throttle gear would stay up until throttle moved back down about * SERVO REvERSAL sWITCHES-With just flip asruitch serco ttavel direction four primary channels can reversed * INDEPENDENT THROW ADJU5T-Ou chotroels thr amount servo travel coo con rrolled udependently * FIFTH CHANNEL ADJUSTServo pouttion etracr switch either rhe Up Down poritioo independently adjustable * TRIM LOCATION VARIABLESTIre locuriun trims us builders discretion yoo cue have standard trim otossed trim oe comhinasiou two * TRIM AUTHORITY PROGRAMMABILITY-By nhaugtng plug-in fined resistors amount servo incursion olsen trims meved progeammable * DUAL RATE--Switches adjustment puss see fuotished peovide DUAL RATE up three channels nAs EXPONENTIAL RATE OPTIONThis plug-in option pronides non-litteot servo ttuoel te latiun stich movement up Ibme channels St 795 ELECTRONIC MIXER OPTIONWith plug-in module nny two functions can c tether nishee uni-dinectiunully ur bi-directinnally St 195 PROGRAMMABLE PUSH BUTTON OPTION-In-fliglrt adjustable 4pee-pengeammed onetrol nurface munemert may obtained push ing button Sf95 THE SILVER SEVEN $281195 Full ni Cd system kit receiver four servos cleeh mish puce Ace dealee meite cull foe complete details crws Complete Ceealogr $100 ladd S 550 foe 1st CIa Mail retinusol Box 511 E 119W 19th Higginsville Mo 64037 816 584-7121 1/3 speed Any degree power between full high down regardless whether engine 1/3 could used cruising flight running anywhere full idle just short bringing gear down other hand once absolute high Only throttle held gear brought down would stay firmly absolute full high throttle would gear May 1980 109 Inexpensive key word ACES new line R/C kits called Silver Series line offers unique combination value soda wide range versatility found todays RIC market until now cutting out biggest cotts Labor furnith kit furnish labor allows us give Eopquality product inexpensive price comparable $800 radios some ita features Ed Robinson tookan Enya 60 Dave PlattT-25 kitand producedtnls beautiful machine Ed Yonkers NY flies CL Sport Scale wing flaps operate Aero Gloss paints used finish model Bill Boss photo Fairey Firefly model creation o tynolds Albuquerque NM real ones used Royal Navy WW2 fighter reconnaissance aircraft Model has 40 power Bill Pepin photo
Edition: Model Aviation - 1980/05
Page Numbers: 40, 108, 109
[7g AEROBATICS Wynn Paul WHERE did get present precision aero batics pattern anyway ask dont like overhead eights hourglass did ever get thought up madness Model Industry Association meeting February 1946 antecedent present Hobby Industry Association Meeting commit tee appointed AMA composed John Clemens Jim Walker Russ Weber Megow Models got together hotel room discuss rules Stunt John acting secretary aset rules drawn up Actually committee looking control line rules meeting specifically stunt fashion maneuvers fit planes engines time said John Clemens recently conversation writer published rules 1946 Nationals held Wichita KS contained following maneuvers 1 Precision overhead flight model held 25-ft diameter circle wheel touching spot landing 2 Aerobatics stall recovery wing over vertical dive inside loop outside loop inverted flight square loop pair spec tacles rolls full roll half roll Cuban eight Immelmann turn flying two planes once looping two planes once waltz formation shift following plane maneuvered over front ofand below leading plane reversed back original position 3 Novelty unassisted takeoff pick-up glider pick-up object release glider sign parachute laying smoke screen retract landing gear carrier flight hand launch using U-Reely control fly out 70 feet reel model back hand touching ground dive bombing bomb must land within 10 feet target balloon burstinglst 2nd 3rd attacks motor control multiple motor operation 12 points six motors remote control model flown outside flight circle must take off complete least five laps land nose-over about group maneuvers foam winged super-trick stunter 80s no appearance points first year stunt Total possible points 292 Open stunt first year won R H Roof Tulsa OK 56 points flying seven-ft wingspan Taylorcraft Forster 99 engine However sensation Nationals barefoot boy named Davis Slagle Burbank California scored 102 points Junior Davis did fly two planes once among other tricks also won Walker Cup trophy initial year its existence Unfortunately several versions Walker Cup originally awarded have written Davis never received answer pattern stayed same 1947 Davis Slagle again won Walker Cup Junior stunt 1355 points Robert Tucker Elizabeth NJ won Open 102 points fol lowed J C Madman Yates John E Clemens have copy rules 1948 must have some changes scores significantly higher Jim Saftig won Open 3825 Davis Slagle won Junior again 3645 Slagle won Walker Cup again knew Jim Walker marvelous abilities fly anything wings can recognize initial Stunt pattern reflected influence made up maneuvers specialized However request AMA Roy E Mayes California Continued page 108 PIus 20 handiworkof Neal Thompson Mansfield MA enlarged Nobler design 20% Super Tigre 46 Craft has foam wing 40 Model Aviation Excellent detail Ted Fanchers Excitation 79 Nationals Larry Kruse photo Frank McMillan Bellevue NE holds Impulse Craft has foam wing powered OS Max 40 engine 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 changed appearance points range 21 77 reverse wingover maneuver added addition wingover Inside loops cut three inverted flight repositioned just after inside loops know procedure today Outside round loops started inverted flight three done square loop maneuver moved follow outside round loops followed horizontal eights vertical eights overhead eights new maneuver destined nemesis square eight rules cycle kept pattern same 1954 rules cycle 1955-56 according copy rule book sent Bill Netzeband changed appearance points range 3 24 triangle figure added time spring 1957 George Aldrich asked Carl Wheeley AMA work over stunt rules According recent conversa tion George remember memories 23 years ago made scores range 0 40 however through printing editing error scores came out rule book 10-40 maneuvers except landing George said tried couple years get 10-40 changed back original 0-40 couldnt get rules altered also know 57 pattern added hourglass figure four leaf clover George said got idea four leaf clover pattern used old New York Mirror Meet hourglass Georges idea tri angular vertical eight doesnt remember named figure hourglass does remember Bill Netzeband wrote him showing maneuver couldnt done written described rule book Someone Europe finally wrote description hourglass could actually performed George also changed appearance points maximum 40 Aldrich pattern stayed effect until appearance points changed 74-75 rules cycle Also 76-77 rules cycle allowed contestants use backup model case crash equipment failure Because space etc have left Out some sublime points such pull testing descrip tion maneuvers 45 60 degrees instance some other information idea present development pattern first Nationals information stunt PAMPA contact Wynn Paul 1640 Maywick Dr Lexington KY 40504 CL Scale/Gretz continued page 41 absolute full high throttle gear would stay up until throttle moved back down about * SERVO REvERSAL sWITCHES-With just flip asruitch serco ttavel direction four primary channels can reversed * INDEPENDENT THROW ADJU5T-Ou chotroels thr amount servo travel coo con rrolled udependently * FIFTH CHANNEL ADJUSTServo pouttion etracr switch either rhe Up Down poritioo independently adjustable * TRIM LOCATION VARIABLESTIre locuriun trims us builders discretion yoo cue have standard trim otossed trim oe comhinasiou two * TRIM AUTHORITY PROGRAMMABILITY-By nhaugtng plug-in fined resistors amount servo incursion olsen trims meved progeammable * DUAL RATE--Switches adjustment puss see fuotished peovide DUAL RATE up three channels nAs EXPONENTIAL RATE OPTIONThis plug-in option pronides non-litteot servo ttuoel te latiun stich movement up Ibme channels St 795 ELECTRONIC MIXER OPTIONWith plug-in module nny two functions can c tether nishee uni-dinectiunully ur bi-directinnally St 195 PROGRAMMABLE PUSH BUTTON OPTION-In-fliglrt adjustable 4pee-pengeammed onetrol nurface munemert may obtained push ing button Sf95 THE SILVER SEVEN $281195 Full ni Cd system kit receiver four servos cleeh mish puce Ace dealee meite cull foe complete details crws Complete Ceealogr $100 ladd S 550 foe 1st CIa Mail retinusol Box 511 E 119W 19th Higginsville Mo 64037 816 584-7121 1/3 speed Any degree power between full high down regardless whether engine 1/3 could used cruising flight running anywhere full idle just short bringing gear down other hand once absolute high Only throttle held gear brought down would stay firmly absolute full high throttle would gear May 1980 109 Inexpensive key word ACES new line R/C kits called Silver Series line offers unique combination value soda wide range versatility found todays RIC market until now cutting out biggest cotts Labor furnith kit furnish labor allows us give Eopquality product inexpensive price comparable $800 radios some ita features Ed Robinson tookan Enya 60 Dave PlattT-25 kitand producedtnls beautiful machine Ed Yonkers NY flies CL Sport Scale wing flaps operate Aero Gloss paints used finish model Bill Boss photo Fairey Firefly model creation o tynolds Albuquerque NM real ones used Royal Navy WW2 fighter reconnaissance aircraft Model has 40 power Bill Pepin photo