C C 0 This U latest version 049/051 competition free flight has scored prodigious number wins over past 12 years U Russ Backer THE SIMPLEX 300 came being least drafting board 1965 design solely have similar designs before certainly lot since Some later ones include Mel Schmidts Shocer Dennis Broncos Sal Taibis Orbiteer Dave Rounsvilles FAI Excelsior dead ringer Mike Hallums Star Seeker latest Jim Clem Country Boy Thanks Jim wont have work hard writing flying instructions time would get little upset time saw model other name now can say thanks helped prove type design good After Id hate find out after 12 years playing dam thing didnt fly Simplex 300 effort de sign clean simple quick-to-build consistent model rules time built three 5-minute flights 6 7 plane has good up 30 minutes number times until pilot goofed Category rules now model can 8-second engine run air has feel its still very com petitive Category II model Simplex 300 has very good rec ord although three fellows have ever really flown design Bob Patchin Tom Arriola myself model first saw action 1966 San Valeers Annual Bob built two models like build pairs because its faster always have backup ship Bob flown prior meet tested contest placed first fifth helped win Sweeps Bob placed second fourth times ran 17 30 minutes what Bob Tom could dig up record doesnt look too bad over 10-year period 1965 1975 1/2A have 16 firsts 11 seconds six thirds contributing five Open Sweeps three Junior Sweeps two high times Category II /2A record Category ROW record held up time number awards other classes model has come through big ger contests too West Coast Free Flight Championships 1970 1971 took seconds gas Bob Patchin came out closet week before 1972 FF Champs built Simplex 300 put new out-of-the box Cox went after both four maxes both put planes same downer got last part over fence poor Bob got chicken feathers fifth sixth No go 1973 returned 1974 first /2A lost model out sight winning flight about five minutes before end contest mate model came through against Mel Schmidt Shocer Max Men Annual 1974 both maxed out 930 am trying wait out other proved bad decision wind came upit really blew Mel put 333 body else probably would have put model away model went up up away over mountain won hard way Back building board 1975 FF Champs tried again fourth place gas could come up also entered gas little problem engine brake coming about 2 3 seconds Fortynine seconds later model hit ground Gadgets can problem would ever give upthats too simple have developed several different kinds 32 Model Aviation like build pairs because faster says Russ always have backup ship Simplex 300 gathered its initial first place San Valeers Annual back 1966 1/4 SO LE MED HARD BALSATOP SPARS SEE NOTE 4 1/16 SHT ONKI/I6 CIA S I/S DOWEL TAPER TIP SPARS TO 3/161/16 5 I/B HARD BALSABOTTOM CENTERCUT IN HALF SEE NOTE Sis REOD IlEif -___ ==---~ sD -_____ n WI 1W7WBWA~oW3WD S S/B T E C5/32SYKBOTTOM SPAR I/B 5 1/4MATCH TO WING PLATFORMI/lB SHT BOTTOM CENTER K2 I/3D PLYWOODTOP SPARS CUT FOR SHTMED HARD BALSAMED HARD BALSAI/lB S I/B HARD BALSA3/16 50 LE 4 RIBS ONLY450 4EZZZ N TIP SKID I/B PLYWOODW IS REOD TI S REOD AT DIHEDRAL-WING AND STAB TIP DETAIL -4 ON WIND AND ON TIP OF STAB W5 2 REOD WI AT BREAK STAB RIB 14REOD ZWB S REODI/lB SHT LIGHTC GRAIN flWD S REODr----. I/IS SHT GUSSETS B REODSEE NOTE SBOTTOM SPAR 3/35 5 S/lBI/B U I/S TE STK 12 W7 S REOD 2 REOD SHT BALSA B PLYWOOD ANT W3 S REOD--FlTPSP STAB TILTIP9FILLETS 2 SETSSEE NOTE SBALSAK3 T TURNREFW4SREODWY GREGG1/16 SHT BALSA~--HI SEE NOTE3 H2 ccWING PLATFORMNOTE GRAIN DIRECTION-LU1iJK4 I- TCH TO KS AND TE SYK11/ I/B 5 3/lB SPRUCEI~1F1F1 mmmri ri r r IA m FAIR IN STRIPKEY SLOT MATCH TO KI .sK5 I/lBXI/BSPRUCESTRIPSREOD.~\1ILiLALJLJHLJ [zjL~I LjI~gii FlPWP2P3P4P5P6P7 P8 P9101112STAB KEYS m4/I/1SEE NOTE I0E~TEARUDDER TAB REFTPSP PP4F5P6I/B PLYWOODI/B ANT BALSAI/lB SHT BALSA ......... PLYWOOD REF2P3 rnS0LT/..I/lBI/B TE STK -TOP VIEW P1 FUSELAGE BOX BBREFALK COVER I/lB SHT BALSA SODA STRAW mPWWITH ALUM TUBEP7P8P90ii2RUDDER I/lB SHY BALSA NOTE GRAIN DIRECTION WING DINEDRAL AT RIBW7i S A/3D V A/SPYLON I/B ANT TE SYKMEDIUM HARD BALSA NOTE GRAN DRECTION 4O04A0-PATTERNFRONT VIEW I/IA WASH OUT T E UP Pw H TIPS REF SEE NOTE IALUM WASHER EPOXY AAIMATCH DRILL FROM CDX TO TANK MOUNY4 USE I/B DIA DRILLcL. K5 FOR 256 BLIND NUTS PRESS IN PLACE AND EPOXY INCIDENCE BLOCK I/AK DIA MW SKID 2MATCH DRILL FROM TATONE TICKOFF MKS TIMER PLYWOOD CDX TO 049 OR 0511/32 DIA MW SKIDUSE I/S DIA DRILL FOR SAK BLIND NUTS PRESS IN4 MAKE NOTCHES FOR REAR TOP SPAR AFTER WIND IS COMPLETE CDX TANK MOUNTPLACE AND EPOXY NUTS PROTRUDE THROUGH TIMERUSE STRAIGHT EDGE AND SINGLE EDGED RAZOR BLADEDESIGNED AND DRAWN N C RUSS BACKER CDX 63 GRAY PROPPLATE SO GRIND FLUSH WITH FACE ED FOR PROPER DEPTH 3ALL WIRE HOOKS ARE MADE FROM PAPER CLIPSA MAKE SURE ALL KEYS RUN TRUE TO CENTER LINE IGINATED lABS BY N BACKER AND N PAYCHIN CA construction basic design has remained same Ive used profile box geodetic construction combina tions thereof latest box type symmetrical pylon rudder vortex tips wing stab pressurized fuel sys tem prop brake d Ia FAIthe whole nine yards version have dubbed Complex Im sure necessary chose basic 300 design article Simplex has built two sizes 300 350 basic difference airfoil thickness wing stab 300 10% 35% 350 8% 35% think 300 could thinned out 8% would get altitude affect glide too much long weight held 7 ounces Ive little trouble keeping latest models under 7 ounces because little extras plywood keys wire skids dope fuel proofing etc However models outlast originals much consistent Also high cost building materials pretty much forces go route Construction Wing Stab Simplex may built conventional way however use couple simple fixtures Ill tell aboui let decide yourself wing has flat center section will fit nicely model box can also built wing jig two time moving tip fixture out jig can build span want dihedral stays same wing jig made ood tips set dihedral angle 280 tips set piece ood held place screws set apart whatever center section span building Tape wing plan fixture cover waxed paper what ever youre ready start ipake full set rib templates 1/16 plywood Dont cut 1/16 X /8 Continued page 91 34 Model Aviation hardwood wing key fits recess made top platform Rear wing key consists plywood cutout engaging TE platform Details pop-up tail Note slot platform front key stab place rear key also holds eyelet fits its slot Front end neat compact Engine-run timer Tatone pinchoff typo Text describes timer mods originally suggested Sal Taibi Two ways go Bottom fuselage plane article top fuselage complex version ala FAI propeller brake pressure tank vortex tips wing stab recollections above article Simplex/Backer continued page 34 diagonal spar notch notch put after other construction complete Use straightedge single-edge razor blade Glue small stick razor blade set depth cut cut notches Pick good straight-grain dium-hard balsa center section spars lighter wood tips wing can completed except rear diag onal spar put after wing dry Raise trailing edge tips 1/16 block glue spars place will give washout need Everything else flat No warps please Because stabilizer flat can completed plan main thing keep light Fuselage first thing glue material pylon using mediumhard balsa sheet rudder use 1/16 sheet C-grain still use old model lacquer cement made Fullers works well nitrates sands well its getting hard find can also use Tite Bond Ambroid whatever pylon rudder drying cut out fireweall FW timer plate TP together can drill holes simultaneously Locate holes drilled using tank timer Use diameter drill 2-56 blind nuts sure check nuts threads fore press place Dont laughIve found some threads Before applying epoxy run screws theyre flush back blind nut keeps epoxy off threads blind nuts timer plate will protrude through youll have grind flush face Next cut out sides Ive found youre careful can cut sides top bottom out 1/16 X 4 X 36 sheet medium C-grain balsa use alumi num straightedge Cut off nose left side overlaps formers F3 butt glue timer plate TP Make sure right side up means check downthrust angles 2 per plan template made 1/32 plywood may benefi cial same left thrust Make tracing use carbon paper transfer outlines pylon rud der should dry now Sand 220 wet/dry sandpaper Now youre ready start assembly use simple holding alignment fixture made piece straight-cut pine X 2 X 32 draw center line 2-in face make -in wide saw cut end 1/16 wide cut other using top view fuse lage plan reference depths may draw top view fixture did cut plan glue fixture contact cement Take pylon draw line parallel bottom fuselage side slide pylon A-in slot Flush line top surface fixture make sure wing angle pylon 2 incidence Use small C-clamp hold pylon place same rudder Cut out F2 through F5 Align over fixture glue py lon sure check left-thrust angle time2 way tend little wild glue may want wax surface holding fixture sides dry set place Dont glue rudder Use clamp-style clothespin hold sides together Glue rudder after F6 through F9 place checking alignment pylon rudder piece monofilament line run around front back put fillets Fl drying cut slot top sheet pylon rudder glue place use flat weight top fuselage drying some pins necessary operation too dry remove fixture stall soda straws aluminum tube dethermalizer line sure overlaps go direction youll never get line pulled through line will hang up smallest lip Cut slots bottom sheet skid rudder glue bottom Put fuselage January 1978 91 3-book boxed set covers fastest racing mschines 3 4 5-view scale drawings color schemes markings construc tion performance dats pilots race results descriptive illustrated story 22 Unlimiteds 41 Formula ls 19 Sport Biplanes 8 AT6/SNJs current era plua over 90 great Thomp son Bendix Greve Goodyear racers 30s 40s Iua fabulous Schneider Cup floatp lanes 20s Pulitzer Racers Gordon Benne Racers lamous European racers way back first air race win ner 1909 Curtiss Golden Flyer- jtl A95 234 planes all t Quality printed 192 big 8 x 11 pages truly fine reference POSTAGE rur aviation library Order yours INCLUDED o Early Air Racera 3-vlewa 1909-29 . 495 O National Air Racers 3-views 29-49 0 Modem Air Racers 3-views 4975 495 Send Check Money Order PUBLICATIONS P0 05 2T24 VIP IOCOFITEE NEW VORS 14828 RETURN MAIL DELIVERY Name Street City StateZip back fixture weight pin After its dry remove fuselage fixture install spacer SP firewall FW Recheck down-thrust left-thrust angles use 5-minute epoxy job drying cut out keys stab mount wing platform parts install keys use straightedge laid against pylon rudder reference tilt stab mount 1 / l6 right turn Use 5-minute epoxy keys install wing platform keep square straight Sand out airplane prior installing keys stab mount skid wires etc entire ship now ready final sanding Silk firewall cover Japanese tissue Water shrink brush three four coats 50/50 nitrate dope fuel-proof put coat clear epoxy fuselage wing stab use airbrush spray two coats butyrate dope over nitrate ever may wish use clear epoxy whole plane plan use tissue trim numbers etc cut out put after first coat nitrate Timer Modifications found pinch-off timer new camera type moves quite slowly modify remov ing five six teeth main timer gear will snap off about h off fuel line gear teeth can removed Dremel tool 1 / 16-diameter cutter small pattern file will also work probably little safer also put piece plastic fuel line bumper pinch-off arm pre vent cutting fuel line check quite often also use piece material cut Dr Scholls foot pad behind timer face insulate timer en gine vibration idea courtesy Sal Taibi Testing Before flying check airplane care fully Again no warps please want 2 down-thrust 2 left-thrust 20 incidence wing 0 stab 3/64-in right stab tiltthats right side up looking rearl/16-in washout trailing edge both wing tips means 70%CG Pick calm morning hand-glide plane everything specified will have long flat right glide within paper shim two Before make first power flight double check timer proper shutoff time put fuse dont overlap rubberband much pinch fire out Always check stab key see its down dont youll likely picking model back side Enough said test flew model built ar ticle after aged about three months like take long thing called work keeps getting way toys test went follows First flight prop forwards engine running full 4 seconds launched about 750 angle slightly right wind did half turn rolled out showed slightly tight right turn glide Sec ond flight 7 seconds full powerno Half Retracts Ten years ago Half-A fullhouse model retracts wasnt gleam mad mans eye tiny retracts thanks Robart accessory think-tank folks Offered tricycle retracts $2295 mains $1695 Price too break through Use standard retract servo Unit size about 1-5/8 x 7/8 Molded plastic low weight Robard 203 E Illinois Ave St Charles IL 60174 product review product review product review change just went higher Third flight 10 seconds full power removed about 1/64 built-in right turn model did about full turn nice transi tion didnt have use rudder tab model have use some oth er models especially doing VTO use little left-thrust little right tab model goes straight up falling off right wing As speed builds up tab takes effect model rolls right After three initial test flights completed 900 am decided run series flights since day Lake Elsinore looked like going good motor runs 9 10 sec onds using Cox 049 6D-3P Cox grey prop 40-40 Fox fuel motor tacs about 18500 rpm able make flights because very little drift through day After day testing just knew ready Thermal Thumbers Mini FAI Contest Lake Elsinore March 6 1977 contest flown five rounds 10-second engine runs 3-minute maxes end five rounds maxed out went two-man flyoff guess what Old RG short-fused himself thing wrong mod eljust pilot error Try Simplex think youll like FF Duration/Meuser continued page 37 warding way spend ones life bur geoning Peanut Scale Walnut Scale movements have feet sturdy stuff akin sand Scale Staffel bunch also enjoys col lecting trophies collected 25 Nats isnt uncommon Scale group identify itself staffel escadrille go whole trip will start calling other Captain What sis Lieutenant So-n-so theyll dress up World War Uno costumes etc sort hope no whatever will ball Present membership includes Peck Pardoe Mather assortment Hannans Noonan two bunch others live near San Diego per haps theyll let play too bring own ball Write Bob Peck Box 2498 La Mesa CA 92041 Bubble Machine Super Bubble Fac tory has become accepted useful convenient thermal detec tion aids good John Olden kamp found way improve thin edges plastic handle tend make uncomfortable hold adult extended periods time John epoxied some 3A-in soft balsa sheet handle carved sanded finger-fitting contour Adding reservoir capacity extended thermal hunting simply matter 92 Model Aviation Charles Mendenhall product review product review product review
Edition: Model Aviation - 1978/01
Page Numbers: 32, 33, 34, 91, 92
C C 0 This U latest version 049/051 competition free flight has scored prodigious number wins over past 12 years U Russ Backer THE SIMPLEX 300 came being least drafting board 1965 design solely have similar designs before certainly lot since Some later ones include Mel Schmidts Shocer Dennis Broncos Sal Taibis Orbiteer Dave Rounsvilles FAI Excelsior dead ringer Mike Hallums Star Seeker latest Jim Clem Country Boy Thanks Jim wont have work hard writing flying instructions time would get little upset time saw model other name now can say thanks helped prove type design good After Id hate find out after 12 years playing dam thing didnt fly Simplex 300 effort de sign clean simple quick-to-build consistent model rules time built three 5-minute flights 6 7 plane has good up 30 minutes number times until pilot goofed Category rules now model can 8-second engine run air has feel its still very com petitive Category II model Simplex 300 has very good rec ord although three fellows have ever really flown design Bob Patchin Tom Arriola myself model first saw action 1966 San Valeers Annual Bob built two models like build pairs because its faster always have backup ship Bob flown prior meet tested contest placed first fifth helped win Sweeps Bob placed second fourth times ran 17 30 minutes what Bob Tom could dig up record doesnt look too bad over 10-year period 1965 1975 1/2A have 16 firsts 11 seconds six thirds contributing five Open Sweeps three Junior Sweeps two high times Category II /2A record Category ROW record held up time number awards other classes model has come through big ger contests too West Coast Free Flight Championships 1970 1971 took seconds gas Bob Patchin came out closet week before 1972 FF Champs built Simplex 300 put new out-of-the box Cox went after both four maxes both put planes same downer got last part over fence poor Bob got chicken feathers fifth sixth No go 1973 returned 1974 first /2A lost model out sight winning flight about five minutes before end contest mate model came through against Mel Schmidt Shocer Max Men Annual 1974 both maxed out 930 am trying wait out other proved bad decision wind came upit really blew Mel put 333 body else probably would have put model away model went up up away over mountain won hard way Back building board 1975 FF Champs tried again fourth place gas could come up also entered gas little problem engine brake coming about 2 3 seconds Fortynine seconds later model hit ground Gadgets can problem would ever give upthats too simple have developed several different kinds 32 Model Aviation like build pairs because faster says Russ always have backup ship Simplex 300 gathered its initial first place San Valeers Annual back 1966 1/4 SO LE MED HARD BALSATOP SPARS SEE NOTE 4 1/16 SHT ONKI/I6 CIA S I/S DOWEL TAPER TIP SPARS TO 3/161/16 5 I/B HARD BALSABOTTOM CENTERCUT IN HALF SEE NOTE Sis REOD IlEif -___ ==---~ sD -_____ n WI 1W7WBWA~oW3WD S S/B T E C5/32SYKBOTTOM SPAR I/B 5 1/4MATCH TO WING PLATFORMI/lB SHT BOTTOM CENTER K2 I/3D PLYWOODTOP SPARS CUT FOR SHTMED HARD BALSAMED HARD BALSAI/lB S I/B HARD BALSA3/16 50 LE 4 RIBS ONLY450 4EZZZ N TIP SKID I/B PLYWOODW IS REOD TI S REOD AT DIHEDRAL-WING AND STAB TIP DETAIL -4 ON WIND AND ON TIP OF STAB W5 2 REOD WI AT BREAK STAB RIB 14REOD ZWB S REODI/lB SHT LIGHTC GRAIN flWD S REODr----. I/IS SHT GUSSETS B REODSEE NOTE SBOTTOM SPAR 3/35 5 S/lBI/B U I/S TE STK 12 W7 S REOD 2 REOD SHT BALSA B PLYWOOD ANT W3 S REOD--FlTPSP STAB TILTIP9FILLETS 2 SETSSEE NOTE SBALSAK3 T TURNREFW4SREODWY GREGG1/16 SHT BALSA~--HI SEE NOTE3 H2 ccWING PLATFORMNOTE GRAIN DIRECTION-LU1iJK4 I- TCH TO KS AND TE SYK11/ I/B 5 3/lB SPRUCEI~1F1F1 mmmri ri r r IA m FAIR IN STRIPKEY SLOT MATCH TO KI .sK5 I/lBXI/BSPRUCESTRIPSREOD.~\1ILiLALJLJHLJ [zjL~I LjI~gii FlPWP2P3P4P5P6P7 P8 P9101112STAB KEYS m4/I/1SEE NOTE I0E~TEARUDDER TAB REFTPSP PP4F5P6I/B PLYWOODI/B ANT BALSAI/lB SHT BALSA ......... PLYWOOD REF2P3 rnS0LT/..I/lBI/B TE STK -TOP VIEW P1 FUSELAGE BOX BBREFALK COVER I/lB SHT BALSA SODA STRAW mPWWITH ALUM TUBEP7P8P90ii2RUDDER I/lB SHY BALSA NOTE GRAIN DIRECTION WING DINEDRAL AT RIBW7i S A/3D V A/SPYLON I/B ANT TE SYKMEDIUM HARD BALSA NOTE GRAN DRECTION 4O04A0-PATTERNFRONT VIEW I/IA WASH OUT T E UP Pw H TIPS REF SEE NOTE IALUM WASHER EPOXY AAIMATCH DRILL FROM CDX TO TANK MOUNY4 USE I/B DIA DRILLcL. K5 FOR 256 BLIND NUTS PRESS IN PLACE AND EPOXY INCIDENCE BLOCK I/AK DIA MW SKID 2MATCH DRILL FROM TATONE TICKOFF MKS TIMER PLYWOOD CDX TO 049 OR 0511/32 DIA MW SKIDUSE I/S DIA DRILL FOR SAK BLIND NUTS PRESS IN4 MAKE NOTCHES FOR REAR TOP SPAR AFTER WIND IS COMPLETE CDX TANK MOUNTPLACE AND EPOXY NUTS PROTRUDE THROUGH TIMERUSE STRAIGHT EDGE AND SINGLE EDGED RAZOR BLADEDESIGNED AND DRAWN N C RUSS BACKER CDX 63 GRAY PROPPLATE SO GRIND FLUSH WITH FACE ED FOR PROPER DEPTH 3ALL WIRE HOOKS ARE MADE FROM PAPER CLIPSA MAKE SURE ALL KEYS RUN TRUE TO CENTER LINE IGINATED lABS BY N BACKER AND N PAYCHIN CA construction basic design has remained same Ive used profile box geodetic construction combina tions thereof latest box type symmetrical pylon rudder vortex tips wing stab pressurized fuel sys tem prop brake d Ia FAIthe whole nine yards version have dubbed Complex Im sure necessary chose basic 300 design article Simplex has built two sizes 300 350 basic difference airfoil thickness wing stab 300 10% 35% 350 8% 35% think 300 could thinned out 8% would get altitude affect glide too much long weight held 7 ounces Ive little trouble keeping latest models under 7 ounces because little extras plywood keys wire skids dope fuel proofing etc However models outlast originals much consistent Also high cost building materials pretty much forces go route Construction Wing Stab Simplex may built conventional way however use couple simple fixtures Ill tell aboui let decide yourself wing has flat center section will fit nicely model box can also built wing jig two time moving tip fixture out jig can build span want dihedral stays same wing jig made ood tips set dihedral angle 280 tips set piece ood held place screws set apart whatever center section span building Tape wing plan fixture cover waxed paper what ever youre ready start ipake full set rib templates 1/16 plywood Dont cut 1/16 X /8 Continued page 91 34 Model Aviation hardwood wing key fits recess made top platform Rear wing key consists plywood cutout engaging TE platform Details pop-up tail Note slot platform front key stab place rear key also holds eyelet fits its slot Front end neat compact Engine-run timer Tatone pinchoff typo Text describes timer mods originally suggested Sal Taibi Two ways go Bottom fuselage plane article top fuselage complex version ala FAI propeller brake pressure tank vortex tips wing stab recollections above article Simplex/Backer continued page 34 diagonal spar notch notch put after other construction complete Use straightedge single-edge razor blade Glue small stick razor blade set depth cut cut notches Pick good straight-grain dium-hard balsa center section spars lighter wood tips wing can completed except rear diag onal spar put after wing dry Raise trailing edge tips 1/16 block glue spars place will give washout need Everything else flat No warps please Because stabilizer flat can completed plan main thing keep light Fuselage first thing glue material pylon using mediumhard balsa sheet rudder use 1/16 sheet C-grain still use old model lacquer cement made Fullers works well nitrates sands well its getting hard find can also use Tite Bond Ambroid whatever pylon rudder drying cut out fireweall FW timer plate TP together can drill holes simultaneously Locate holes drilled using tank timer Use diameter drill 2-56 blind nuts sure check nuts threads fore press place Dont laughIve found some threads Before applying epoxy run screws theyre flush back blind nut keeps epoxy off threads blind nuts timer plate will protrude through youll have grind flush face Next cut out sides Ive found youre careful can cut sides top bottom out 1/16 X 4 X 36 sheet medium C-grain balsa use alumi num straightedge Cut off nose left side overlaps formers F3 butt glue timer plate TP Make sure right side up means check downthrust angles 2 per plan template made 1/32 plywood may benefi cial same left thrust Make tracing use carbon paper transfer outlines pylon rud der should dry now Sand 220 wet/dry sandpaper Now youre ready start assembly use simple holding alignment fixture made piece straight-cut pine X 2 X 32 draw center line 2-in face make -in wide saw cut end 1/16 wide cut other using top view fuse lage plan reference depths may draw top view fixture did cut plan glue fixture contact cement Take pylon draw line parallel bottom fuselage side slide pylon A-in slot Flush line top surface fixture make sure wing angle pylon 2 incidence Use small C-clamp hold pylon place same rudder Cut out F2 through F5 Align over fixture glue py lon sure check left-thrust angle time2 way tend little wild glue may want wax surface holding fixture sides dry set place Dont glue rudder Use clamp-style clothespin hold sides together Glue rudder after F6 through F9 place checking alignment pylon rudder piece monofilament line run around front back put fillets Fl drying cut slot top sheet pylon rudder glue place use flat weight top fuselage drying some pins necessary operation too dry remove fixture stall soda straws aluminum tube dethermalizer line sure overlaps go direction youll never get line pulled through line will hang up smallest lip Cut slots bottom sheet skid rudder glue bottom Put fuselage January 1978 91 3-book boxed set covers fastest racing mschines 3 4 5-view scale drawings color schemes markings construc tion performance dats pilots race results descriptive illustrated story 22 Unlimiteds 41 Formula ls 19 Sport Biplanes 8 AT6/SNJs current era plua over 90 great Thomp son Bendix Greve Goodyear racers 30s 40s Iua fabulous Schneider Cup floatp lanes 20s Pulitzer Racers Gordon Benne Racers lamous European racers way back first air race win ner 1909 Curtiss Golden Flyer- jtl A95 234 planes all t Quality printed 192 big 8 x 11 pages truly fine reference POSTAGE rur aviation library Order yours INCLUDED o Early Air Racera 3-vlewa 1909-29 . 495 O National Air Racers 3-views 29-49 0 Modem Air Racers 3-views 4975 495 Send Check Money Order PUBLICATIONS P0 05 2T24 VIP IOCOFITEE NEW VORS 14828 RETURN MAIL DELIVERY Name Street City StateZip back fixture weight pin After its dry remove fuselage fixture install spacer SP firewall FW Recheck down-thrust left-thrust angles use 5-minute epoxy job drying cut out keys stab mount wing platform parts install keys use straightedge laid against pylon rudder reference tilt stab mount 1 / l6 right turn Use 5-minute epoxy keys install wing platform keep square straight Sand out airplane prior installing keys stab mount skid wires etc entire ship now ready final sanding Silk firewall cover Japanese tissue Water shrink brush three four coats 50/50 nitrate dope fuel-proof put coat clear epoxy fuselage wing stab use airbrush spray two coats butyrate dope over nitrate ever may wish use clear epoxy whole plane plan use tissue trim numbers etc cut out put after first coat nitrate Timer Modifications found pinch-off timer new camera type moves quite slowly modify remov ing five six teeth main timer gear will snap off about h off fuel line gear teeth can removed Dremel tool 1 / 16-diameter cutter small pattern file will also work probably little safer also put piece plastic fuel line bumper pinch-off arm pre vent cutting fuel line check quite often also use piece material cut Dr Scholls foot pad behind timer face insulate timer en gine vibration idea courtesy Sal Taibi Testing Before flying check airplane care fully Again no warps please want 2 down-thrust 2 left-thrust 20 incidence wing 0 stab 3/64-in right stab tiltthats right side up looking rearl/16-in washout trailing edge both wing tips means 70%CG Pick calm morning hand-glide plane everything specified will have long flat right glide within paper shim two Before make first power flight double check timer proper shutoff time put fuse dont overlap rubberband much pinch fire out Always check stab key see its down dont youll likely picking model back side Enough said test flew model built ar ticle after aged about three months like take long thing called work keeps getting way toys test went follows First flight prop forwards engine running full 4 seconds launched about 750 angle slightly right wind did half turn rolled out showed slightly tight right turn glide Sec ond flight 7 seconds full powerno Half Retracts Ten years ago Half-A fullhouse model retracts wasnt gleam mad mans eye tiny retracts thanks Robart accessory think-tank folks Offered tricycle retracts $2295 mains $1695 Price too break through Use standard retract servo Unit size about 1-5/8 x 7/8 Molded plastic low weight Robard 203 E Illinois Ave St Charles IL 60174 product review product review product review change just went higher Third flight 10 seconds full power removed about 1/64 built-in right turn model did about full turn nice transi tion didnt have use rudder tab model have use some oth er models especially doing VTO use little left-thrust little right tab model goes straight up falling off right wing As speed builds up tab takes effect model rolls right After three initial test flights completed 900 am decided run series flights since day Lake Elsinore looked like going good motor runs 9 10 sec onds using Cox 049 6D-3P Cox grey prop 40-40 Fox fuel motor tacs about 18500 rpm able make flights because very little drift through day After day testing just knew ready Thermal Thumbers Mini FAI Contest Lake Elsinore March 6 1977 contest flown five rounds 10-second engine runs 3-minute maxes end five rounds maxed out went two-man flyoff guess what Old RG short-fused himself thing wrong mod eljust pilot error Try Simplex think youll like FF Duration/Meuser continued page 37 warding way spend ones life bur geoning Peanut Scale Walnut Scale movements have feet sturdy stuff akin sand Scale Staffel bunch also enjoys col lecting trophies collected 25 Nats isnt uncommon Scale group identify itself staffel escadrille go whole trip will start calling other Captain What sis Lieutenant So-n-so theyll dress up World War Uno costumes etc sort hope no whatever will ball Present membership includes Peck Pardoe Mather assortment Hannans Noonan two bunch others live near San Diego per haps theyll let play too bring own ball Write Bob Peck Box 2498 La Mesa CA 92041 Bubble Machine Super Bubble Fac tory has become accepted useful convenient thermal detec tion aids good John Olden kamp found way improve thin edges plastic handle tend make uncomfortable hold adult extended periods time John epoxied some 3A-in soft balsa sheet handle carved sanded finger-fitting contour Adding reservoir capacity extended thermal hunting simply matter 92 Model Aviation Charles Mendenhall product review product review product review
Edition: Model Aviation - 1978/01
Page Numbers: 32, 33, 34, 91, 92
C C 0 This U latest version 049/051 competition free flight has scored prodigious number wins over past 12 years U Russ Backer THE SIMPLEX 300 came being least drafting board 1965 design solely have similar designs before certainly lot since Some later ones include Mel Schmidts Shocer Dennis Broncos Sal Taibis Orbiteer Dave Rounsvilles FAI Excelsior dead ringer Mike Hallums Star Seeker latest Jim Clem Country Boy Thanks Jim wont have work hard writing flying instructions time would get little upset time saw model other name now can say thanks helped prove type design good After Id hate find out after 12 years playing dam thing didnt fly Simplex 300 effort de sign clean simple quick-to-build consistent model rules time built three 5-minute flights 6 7 plane has good up 30 minutes number times until pilot goofed Category rules now model can 8-second engine run air has feel its still very com petitive Category II model Simplex 300 has very good rec ord although three fellows have ever really flown design Bob Patchin Tom Arriola myself model first saw action 1966 San Valeers Annual Bob built two models like build pairs because its faster always have backup ship Bob flown prior meet tested contest placed first fifth helped win Sweeps Bob placed second fourth times ran 17 30 minutes what Bob Tom could dig up record doesnt look too bad over 10-year period 1965 1975 1/2A have 16 firsts 11 seconds six thirds contributing five Open Sweeps three Junior Sweeps two high times Category II /2A record Category ROW record held up time number awards other classes model has come through big ger contests too West Coast Free Flight Championships 1970 1971 took seconds gas Bob Patchin came out closet week before 1972 FF Champs built Simplex 300 put new out-of-the box Cox went after both four maxes both put planes same downer got last part over fence poor Bob got chicken feathers fifth sixth No go 1973 returned 1974 first /2A lost model out sight winning flight about five minutes before end contest mate model came through against Mel Schmidt Shocer Max Men Annual 1974 both maxed out 930 am trying wait out other proved bad decision wind came upit really blew Mel put 333 body else probably would have put model away model went up up away over mountain won hard way Back building board 1975 FF Champs tried again fourth place gas could come up also entered gas little problem engine brake coming about 2 3 seconds Fortynine seconds later model hit ground Gadgets can problem would ever give upthats too simple have developed several different kinds 32 Model Aviation like build pairs because faster says Russ always have backup ship Simplex 300 gathered its initial first place San Valeers Annual back 1966 1/4 SO LE MED HARD BALSATOP SPARS SEE NOTE 4 1/16 SHT ONKI/I6 CIA S I/S DOWEL TAPER TIP SPARS TO 3/161/16 5 I/B HARD BALSABOTTOM CENTERCUT IN HALF SEE NOTE Sis REOD IlEif -___ ==---~ sD -_____ n WI 1W7WBWA~oW3WD S S/B T E C5/32SYKBOTTOM SPAR I/B 5 1/4MATCH TO WING PLATFORMI/lB SHT BOTTOM CENTER K2 I/3D PLYWOODTOP SPARS CUT FOR SHTMED HARD BALSAMED HARD BALSAI/lB S I/B HARD BALSA3/16 50 LE 4 RIBS ONLY450 4EZZZ N TIP SKID I/B PLYWOODW IS REOD TI S REOD AT DIHEDRAL-WING AND STAB TIP DETAIL -4 ON WIND AND ON TIP OF STAB W5 2 REOD WI AT BREAK STAB RIB 14REOD ZWB S REODI/lB SHT LIGHTC GRAIN flWD S REODr----. I/IS SHT GUSSETS B REODSEE NOTE SBOTTOM SPAR 3/35 5 S/lBI/B U I/S TE STK 12 W7 S REOD 2 REOD SHT BALSA B PLYWOOD ANT W3 S REOD--FlTPSP STAB TILTIP9FILLETS 2 SETSSEE NOTE SBALSAK3 T TURNREFW4SREODWY GREGG1/16 SHT BALSA~--HI SEE NOTE3 H2 ccWING PLATFORMNOTE GRAIN DIRECTION-LU1iJK4 I- TCH TO KS AND TE SYK11/ I/B 5 3/lB SPRUCEI~1F1F1 mmmri ri r r IA m FAIR IN STRIPKEY SLOT MATCH TO KI .sK5 I/lBXI/BSPRUCESTRIPSREOD.~\1ILiLALJLJHLJ [zjL~I LjI~gii FlPWP2P3P4P5P6P7 P8 P9101112STAB KEYS m4/I/1SEE NOTE I0E~TEARUDDER TAB REFTPSP PP4F5P6I/B PLYWOODI/B ANT BALSAI/lB SHT BALSA ......... PLYWOOD REF2P3 rnS0LT/..I/lBI/B TE STK -TOP VIEW P1 FUSELAGE BOX BBREFALK COVER I/lB SHT BALSA SODA STRAW mPWWITH ALUM TUBEP7P8P90ii2RUDDER I/lB SHY BALSA NOTE GRAIN DIRECTION WING DINEDRAL AT RIBW7i S A/3D V A/SPYLON I/B ANT TE SYKMEDIUM HARD BALSA NOTE GRAN DRECTION 4O04A0-PATTERNFRONT VIEW I/IA WASH OUT T E UP Pw H TIPS REF SEE NOTE IALUM WASHER EPOXY AAIMATCH DRILL FROM CDX TO TANK MOUNY4 USE I/B DIA DRILLcL. K5 FOR 256 BLIND NUTS PRESS IN PLACE AND EPOXY INCIDENCE BLOCK I/AK DIA MW SKID 2MATCH DRILL FROM TATONE TICKOFF MKS TIMER PLYWOOD CDX TO 049 OR 0511/32 DIA MW SKIDUSE I/S DIA DRILL FOR SAK BLIND NUTS PRESS IN4 MAKE NOTCHES FOR REAR TOP SPAR AFTER WIND IS COMPLETE CDX TANK MOUNTPLACE AND EPOXY NUTS PROTRUDE THROUGH TIMERUSE STRAIGHT EDGE AND SINGLE EDGED RAZOR BLADEDESIGNED AND DRAWN N C RUSS BACKER CDX 63 GRAY PROPPLATE SO GRIND FLUSH WITH FACE ED FOR PROPER DEPTH 3ALL WIRE HOOKS ARE MADE FROM PAPER CLIPSA MAKE SURE ALL KEYS RUN TRUE TO CENTER LINE IGINATED lABS BY N BACKER AND N PAYCHIN CA construction basic design has remained same Ive used profile box geodetic construction combina tions thereof latest box type symmetrical pylon rudder vortex tips wing stab pressurized fuel sys tem prop brake d Ia FAIthe whole nine yards version have dubbed Complex Im sure necessary chose basic 300 design article Simplex has built two sizes 300 350 basic difference airfoil thickness wing stab 300 10% 35% 350 8% 35% think 300 could thinned out 8% would get altitude affect glide too much long weight held 7 ounces Ive little trouble keeping latest models under 7 ounces because little extras plywood keys wire skids dope fuel proofing etc However models outlast originals much consistent Also high cost building materials pretty much forces go route Construction Wing Stab Simplex may built conventional way however use couple simple fixtures Ill tell aboui let decide yourself wing has flat center section will fit nicely model box can also built wing jig two time moving tip fixture out jig can build span want dihedral stays same wing jig made ood tips set dihedral angle 280 tips set piece ood held place screws set apart whatever center section span building Tape wing plan fixture cover waxed paper what ever youre ready start ipake full set rib templates 1/16 plywood Dont cut 1/16 X /8 Continued page 91 34 Model Aviation hardwood wing key fits recess made top platform Rear wing key consists plywood cutout engaging TE platform Details pop-up tail Note slot platform front key stab place rear key also holds eyelet fits its slot Front end neat compact Engine-run timer Tatone pinchoff typo Text describes timer mods originally suggested Sal Taibi Two ways go Bottom fuselage plane article top fuselage complex version ala FAI propeller brake pressure tank vortex tips wing stab recollections above article Simplex/Backer continued page 34 diagonal spar notch notch put after other construction complete Use straightedge single-edge razor blade Glue small stick razor blade set depth cut cut notches Pick good straight-grain dium-hard balsa center section spars lighter wood tips wing can completed except rear diag onal spar put after wing dry Raise trailing edge tips 1/16 block glue spars place will give washout need Everything else flat No warps please Because stabilizer flat can completed plan main thing keep light Fuselage first thing glue material pylon using mediumhard balsa sheet rudder use 1/16 sheet C-grain still use old model lacquer cement made Fullers works well nitrates sands well its getting hard find can also use Tite Bond Ambroid whatever pylon rudder drying cut out fireweall FW timer plate TP together can drill holes simultaneously Locate holes drilled using tank timer Use diameter drill 2-56 blind nuts sure check nuts threads fore press place Dont laughIve found some threads Before applying epoxy run screws theyre flush back blind nut keeps epoxy off threads blind nuts timer plate will protrude through youll have grind flush face Next cut out sides Ive found youre careful can cut sides top bottom out 1/16 X 4 X 36 sheet medium C-grain balsa use alumi num straightedge Cut off nose left side overlaps formers F3 butt glue timer plate TP Make sure right side up means check downthrust angles 2 per plan template made 1/32 plywood may benefi cial same left thrust Make tracing use carbon paper transfer outlines pylon rud der should dry now Sand 220 wet/dry sandpaper Now youre ready start assembly use simple holding alignment fixture made piece straight-cut pine X 2 X 32 draw center line 2-in face make -in wide saw cut end 1/16 wide cut other using top view fuse lage plan reference depths may draw top view fixture did cut plan glue fixture contact cement Take pylon draw line parallel bottom fuselage side slide pylon A-in slot Flush line top surface fixture make sure wing angle pylon 2 incidence Use small C-clamp hold pylon place same rudder Cut out F2 through F5 Align over fixture glue py lon sure check left-thrust angle time2 way tend little wild glue may want wax surface holding fixture sides dry set place Dont glue rudder Use clamp-style clothespin hold sides together Glue rudder after F6 through F9 place checking alignment pylon rudder piece monofilament line run around front back put fillets Fl drying cut slot top sheet pylon rudder glue place use flat weight top fuselage drying some pins necessary operation too dry remove fixture stall soda straws aluminum tube dethermalizer line sure overlaps go direction youll never get line pulled through line will hang up smallest lip Cut slots bottom sheet skid rudder glue bottom Put fuselage January 1978 91 3-book boxed set covers fastest racing mschines 3 4 5-view scale drawings color schemes markings construc tion performance dats pilots race results descriptive illustrated story 22 Unlimiteds 41 Formula ls 19 Sport Biplanes 8 AT6/SNJs current era plua over 90 great Thomp son Bendix Greve Goodyear racers 30s 40s Iua fabulous Schneider Cup floatp lanes 20s Pulitzer Racers Gordon Benne Racers lamous European racers way back first air race win ner 1909 Curtiss Golden Flyer- jtl A95 234 planes all t Quality printed 192 big 8 x 11 pages truly fine reference POSTAGE rur aviation library Order yours INCLUDED o Early Air Racera 3-vlewa 1909-29 . 495 O National Air Racers 3-views 29-49 0 Modem Air Racers 3-views 4975 495 Send Check Money Order PUBLICATIONS P0 05 2T24 VIP IOCOFITEE NEW VORS 14828 RETURN MAIL DELIVERY Name Street City StateZip back fixture weight pin After its dry remove fuselage fixture install spacer SP firewall FW Recheck down-thrust left-thrust angles use 5-minute epoxy job drying cut out keys stab mount wing platform parts install keys use straightedge laid against pylon rudder reference tilt stab mount 1 / l6 right turn Use 5-minute epoxy keys install wing platform keep square straight Sand out airplane prior installing keys stab mount skid wires etc entire ship now ready final sanding Silk firewall cover Japanese tissue Water shrink brush three four coats 50/50 nitrate dope fuel-proof put coat clear epoxy fuselage wing stab use airbrush spray two coats butyrate dope over nitrate ever may wish use clear epoxy whole plane plan use tissue trim numbers etc cut out put after first coat nitrate Timer Modifications found pinch-off timer new camera type moves quite slowly modify remov ing five six teeth main timer gear will snap off about h off fuel line gear teeth can removed Dremel tool 1 / 16-diameter cutter small pattern file will also work probably little safer also put piece plastic fuel line bumper pinch-off arm pre vent cutting fuel line check quite often also use piece material cut Dr Scholls foot pad behind timer face insulate timer en gine vibration idea courtesy Sal Taibi Testing Before flying check airplane care fully Again no warps please want 2 down-thrust 2 left-thrust 20 incidence wing 0 stab 3/64-in right stab tiltthats right side up looking rearl/16-in washout trailing edge both wing tips means 70%CG Pick calm morning hand-glide plane everything specified will have long flat right glide within paper shim two Before make first power flight double check timer proper shutoff time put fuse dont overlap rubberband much pinch fire out Always check stab key see its down dont youll likely picking model back side Enough said test flew model built ar ticle after aged about three months like take long thing called work keeps getting way toys test went follows First flight prop forwards engine running full 4 seconds launched about 750 angle slightly right wind did half turn rolled out showed slightly tight right turn glide Sec ond flight 7 seconds full powerno Half Retracts Ten years ago Half-A fullhouse model retracts wasnt gleam mad mans eye tiny retracts thanks Robart accessory think-tank folks Offered tricycle retracts $2295 mains $1695 Price too break through Use standard retract servo Unit size about 1-5/8 x 7/8 Molded plastic low weight Robard 203 E Illinois Ave St Charles IL 60174 product review product review product review change just went higher Third flight 10 seconds full power removed about 1/64 built-in right turn model did about full turn nice transi tion didnt have use rudder tab model have use some oth er models especially doing VTO use little left-thrust little right tab model goes straight up falling off right wing As speed builds up tab takes effect model rolls right After three initial test flights completed 900 am decided run series flights since day Lake Elsinore looked like going good motor runs 9 10 sec onds using Cox 049 6D-3P Cox grey prop 40-40 Fox fuel motor tacs about 18500 rpm able make flights because very little drift through day After day testing just knew ready Thermal Thumbers Mini FAI Contest Lake Elsinore March 6 1977 contest flown five rounds 10-second engine runs 3-minute maxes end five rounds maxed out went two-man flyoff guess what Old RG short-fused himself thing wrong mod eljust pilot error Try Simplex think youll like FF Duration/Meuser continued page 37 warding way spend ones life bur geoning Peanut Scale Walnut Scale movements have feet sturdy stuff akin sand Scale Staffel bunch also enjoys col lecting trophies collected 25 Nats isnt uncommon Scale group identify itself staffel escadrille go whole trip will start calling other Captain What sis Lieutenant So-n-so theyll dress up World War Uno costumes etc sort hope no whatever will ball Present membership includes Peck Pardoe Mather assortment Hannans Noonan two bunch others live near San Diego per haps theyll let play too bring own ball Write Bob Peck Box 2498 La Mesa CA 92041 Bubble Machine Super Bubble Fac tory has become accepted useful convenient thermal detec tion aids good John Olden kamp found way improve thin edges plastic handle tend make uncomfortable hold adult extended periods time John epoxied some 3A-in soft balsa sheet handle carved sanded finger-fitting contour Adding reservoir capacity extended thermal hunting simply matter 92 Model Aviation Charles Mendenhall product review product review product review
Edition: Model Aviation - 1978/01
Page Numbers: 32, 33, 34, 91, 92
C C 0 This U latest version 049/051 competition free flight has scored prodigious number wins over past 12 years U Russ Backer THE SIMPLEX 300 came being least drafting board 1965 design solely have similar designs before certainly lot since Some later ones include Mel Schmidts Shocer Dennis Broncos Sal Taibis Orbiteer Dave Rounsvilles FAI Excelsior dead ringer Mike Hallums Star Seeker latest Jim Clem Country Boy Thanks Jim wont have work hard writing flying instructions time would get little upset time saw model other name now can say thanks helped prove type design good After Id hate find out after 12 years playing dam thing didnt fly Simplex 300 effort de sign clean simple quick-to-build consistent model rules time built three 5-minute flights 6 7 plane has good up 30 minutes number times until pilot goofed Category rules now model can 8-second engine run air has feel its still very com petitive Category II model Simplex 300 has very good rec ord although three fellows have ever really flown design Bob Patchin Tom Arriola myself model first saw action 1966 San Valeers Annual Bob built two models like build pairs because its faster always have backup ship Bob flown prior meet tested contest placed first fifth helped win Sweeps Bob placed second fourth times ran 17 30 minutes what Bob Tom could dig up record doesnt look too bad over 10-year period 1965 1975 1/2A have 16 firsts 11 seconds six thirds contributing five Open Sweeps three Junior Sweeps two high times Category II /2A record Category ROW record held up time number awards other classes model has come through big ger contests too West Coast Free Flight Championships 1970 1971 took seconds gas Bob Patchin came out closet week before 1972 FF Champs built Simplex 300 put new out-of-the box Cox went after both four maxes both put planes same downer got last part over fence poor Bob got chicken feathers fifth sixth No go 1973 returned 1974 first /2A lost model out sight winning flight about five minutes before end contest mate model came through against Mel Schmidt Shocer Max Men Annual 1974 both maxed out 930 am trying wait out other proved bad decision wind came upit really blew Mel put 333 body else probably would have put model away model went up up away over mountain won hard way Back building board 1975 FF Champs tried again fourth place gas could come up also entered gas little problem engine brake coming about 2 3 seconds Fortynine seconds later model hit ground Gadgets can problem would ever give upthats too simple have developed several different kinds 32 Model Aviation like build pairs because faster says Russ always have backup ship Simplex 300 gathered its initial first place San Valeers Annual back 1966 1/4 SO LE MED HARD BALSATOP SPARS SEE NOTE 4 1/16 SHT ONKI/I6 CIA S I/S DOWEL TAPER TIP SPARS TO 3/161/16 5 I/B HARD BALSABOTTOM CENTERCUT IN HALF SEE NOTE Sis REOD IlEif -___ ==---~ sD -_____ n WI 1W7WBWA~oW3WD S S/B T E C5/32SYKBOTTOM SPAR I/B 5 1/4MATCH TO WING PLATFORMI/lB SHT BOTTOM CENTER K2 I/3D PLYWOODTOP SPARS CUT FOR SHTMED HARD BALSAMED HARD BALSAI/lB S I/B HARD BALSA3/16 50 LE 4 RIBS ONLY450 4EZZZ N TIP SKID I/B PLYWOODW IS REOD TI S REOD AT DIHEDRAL-WING AND STAB TIP DETAIL -4 ON WIND AND ON TIP OF STAB W5 2 REOD WI AT BREAK STAB RIB 14REOD ZWB S REODI/lB SHT LIGHTC GRAIN flWD S REODr----. I/IS SHT GUSSETS B REODSEE NOTE SBOTTOM SPAR 3/35 5 S/lBI/B U I/S TE STK 12 W7 S REOD 2 REOD SHT BALSA B PLYWOOD ANT W3 S REOD--FlTPSP STAB TILTIP9FILLETS 2 SETSSEE NOTE SBALSAK3 T TURNREFW4SREODWY GREGG1/16 SHT BALSA~--HI SEE NOTE3 H2 ccWING PLATFORMNOTE GRAIN DIRECTION-LU1iJK4 I- TCH TO KS AND TE SYK11/ I/B 5 3/lB SPRUCEI~1F1F1 mmmri ri r r IA m FAIR IN STRIPKEY SLOT MATCH TO KI .sK5 I/lBXI/BSPRUCESTRIPSREOD.~\1ILiLALJLJHLJ [zjL~I LjI~gii FlPWP2P3P4P5P6P7 P8 P9101112STAB KEYS m4/I/1SEE NOTE I0E~TEARUDDER TAB REFTPSP PP4F5P6I/B PLYWOODI/B ANT BALSAI/lB SHT BALSA ......... PLYWOOD REF2P3 rnS0LT/..I/lBI/B TE STK -TOP VIEW P1 FUSELAGE BOX BBREFALK COVER I/lB SHT BALSA SODA STRAW mPWWITH ALUM TUBEP7P8P90ii2RUDDER I/lB SHY BALSA NOTE GRAIN DIRECTION WING DINEDRAL AT RIBW7i S A/3D V A/SPYLON I/B ANT TE SYKMEDIUM HARD BALSA NOTE GRAN DRECTION 4O04A0-PATTERNFRONT VIEW I/IA WASH OUT T E UP Pw H TIPS REF SEE NOTE IALUM WASHER EPOXY AAIMATCH DRILL FROM CDX TO TANK MOUNY4 USE I/B DIA DRILLcL. K5 FOR 256 BLIND NUTS PRESS IN PLACE AND EPOXY INCIDENCE BLOCK I/AK DIA MW SKID 2MATCH DRILL FROM TATONE TICKOFF MKS TIMER PLYWOOD CDX TO 049 OR 0511/32 DIA MW SKIDUSE I/S DIA DRILL FOR SAK BLIND NUTS PRESS IN4 MAKE NOTCHES FOR REAR TOP SPAR AFTER WIND IS COMPLETE CDX TANK MOUNTPLACE AND EPOXY NUTS PROTRUDE THROUGH TIMERUSE STRAIGHT EDGE AND SINGLE EDGED RAZOR BLADEDESIGNED AND DRAWN N C RUSS BACKER CDX 63 GRAY PROPPLATE SO GRIND FLUSH WITH FACE ED FOR PROPER DEPTH 3ALL WIRE HOOKS ARE MADE FROM PAPER CLIPSA MAKE SURE ALL KEYS RUN TRUE TO CENTER LINE IGINATED lABS BY N BACKER AND N PAYCHIN CA construction basic design has remained same Ive used profile box geodetic construction combina tions thereof latest box type symmetrical pylon rudder vortex tips wing stab pressurized fuel sys tem prop brake d Ia FAIthe whole nine yards version have dubbed Complex Im sure necessary chose basic 300 design article Simplex has built two sizes 300 350 basic difference airfoil thickness wing stab 300 10% 35% 350 8% 35% think 300 could thinned out 8% would get altitude affect glide too much long weight held 7 ounces Ive little trouble keeping latest models under 7 ounces because little extras plywood keys wire skids dope fuel proofing etc However models outlast originals much consistent Also high cost building materials pretty much forces go route Construction Wing Stab Simplex may built conventional way however use couple simple fixtures Ill tell aboui let decide yourself wing has flat center section will fit nicely model box can also built wing jig two time moving tip fixture out jig can build span want dihedral stays same wing jig made ood tips set dihedral angle 280 tips set piece ood held place screws set apart whatever center section span building Tape wing plan fixture cover waxed paper what ever youre ready start ipake full set rib templates 1/16 plywood Dont cut 1/16 X /8 Continued page 91 34 Model Aviation hardwood wing key fits recess made top platform Rear wing key consists plywood cutout engaging TE platform Details pop-up tail Note slot platform front key stab place rear key also holds eyelet fits its slot Front end neat compact Engine-run timer Tatone pinchoff typo Text describes timer mods originally suggested Sal Taibi Two ways go Bottom fuselage plane article top fuselage complex version ala FAI propeller brake pressure tank vortex tips wing stab recollections above article Simplex/Backer continued page 34 diagonal spar notch notch put after other construction complete Use straightedge single-edge razor blade Glue small stick razor blade set depth cut cut notches Pick good straight-grain dium-hard balsa center section spars lighter wood tips wing can completed except rear diag onal spar put after wing dry Raise trailing edge tips 1/16 block glue spars place will give washout need Everything else flat No warps please Because stabilizer flat can completed plan main thing keep light Fuselage first thing glue material pylon using mediumhard balsa sheet rudder use 1/16 sheet C-grain still use old model lacquer cement made Fullers works well nitrates sands well its getting hard find can also use Tite Bond Ambroid whatever pylon rudder drying cut out fireweall FW timer plate TP together can drill holes simultaneously Locate holes drilled using tank timer Use diameter drill 2-56 blind nuts sure check nuts threads fore press place Dont laughIve found some threads Before applying epoxy run screws theyre flush back blind nut keeps epoxy off threads blind nuts timer plate will protrude through youll have grind flush face Next cut out sides Ive found youre careful can cut sides top bottom out 1/16 X 4 X 36 sheet medium C-grain balsa use alumi num straightedge Cut off nose left side overlaps formers F3 butt glue timer plate TP Make sure right side up means check downthrust angles 2 per plan template made 1/32 plywood may benefi cial same left thrust Make tracing use carbon paper transfer outlines pylon rud der should dry now Sand 220 wet/dry sandpaper Now youre ready start assembly use simple holding alignment fixture made piece straight-cut pine X 2 X 32 draw center line 2-in face make -in wide saw cut end 1/16 wide cut other using top view fuse lage plan reference depths may draw top view fixture did cut plan glue fixture contact cement Take pylon draw line parallel bottom fuselage side slide pylon A-in slot Flush line top surface fixture make sure wing angle pylon 2 incidence Use small C-clamp hold pylon place same rudder Cut out F2 through F5 Align over fixture glue py lon sure check left-thrust angle time2 way tend little wild glue may want wax surface holding fixture sides dry set place Dont glue rudder Use clamp-style clothespin hold sides together Glue rudder after F6 through F9 place checking alignment pylon rudder piece monofilament line run around front back put fillets Fl drying cut slot top sheet pylon rudder glue place use flat weight top fuselage drying some pins necessary operation too dry remove fixture stall soda straws aluminum tube dethermalizer line sure overlaps go direction youll never get line pulled through line will hang up smallest lip Cut slots bottom sheet skid rudder glue bottom Put fuselage January 1978 91 3-book boxed set covers fastest racing mschines 3 4 5-view scale drawings color schemes markings construc tion performance dats pilots race results descriptive illustrated story 22 Unlimiteds 41 Formula ls 19 Sport Biplanes 8 AT6/SNJs current era plua over 90 great Thomp son Bendix Greve Goodyear racers 30s 40s Iua fabulous Schneider Cup floatp lanes 20s Pulitzer Racers Gordon Benne Racers lamous European racers way back first air race win ner 1909 Curtiss Golden Flyer- jtl A95 234 planes all t Quality printed 192 big 8 x 11 pages truly fine reference POSTAGE rur aviation library Order yours INCLUDED o Early Air Racera 3-vlewa 1909-29 . 495 O National Air Racers 3-views 29-49 0 Modem Air Racers 3-views 4975 495 Send Check Money Order PUBLICATIONS P0 05 2T24 VIP IOCOFITEE NEW VORS 14828 RETURN MAIL DELIVERY Name Street City StateZip back fixture weight pin After its dry remove fuselage fixture install spacer SP firewall FW Recheck down-thrust left-thrust angles use 5-minute epoxy job drying cut out keys stab mount wing platform parts install keys use straightedge laid against pylon rudder reference tilt stab mount 1 / l6 right turn Use 5-minute epoxy keys install wing platform keep square straight Sand out airplane prior installing keys stab mount skid wires etc entire ship now ready final sanding Silk firewall cover Japanese tissue Water shrink brush three four coats 50/50 nitrate dope fuel-proof put coat clear epoxy fuselage wing stab use airbrush spray two coats butyrate dope over nitrate ever may wish use clear epoxy whole plane plan use tissue trim numbers etc cut out put after first coat nitrate Timer Modifications found pinch-off timer new camera type moves quite slowly modify remov ing five six teeth main timer gear will snap off about h off fuel line gear teeth can removed Dremel tool 1 / 16-diameter cutter small pattern file will also work probably little safer also put piece plastic fuel line bumper pinch-off arm pre vent cutting fuel line check quite often also use piece material cut Dr Scholls foot pad behind timer face insulate timer en gine vibration idea courtesy Sal Taibi Testing Before flying check airplane care fully Again no warps please want 2 down-thrust 2 left-thrust 20 incidence wing 0 stab 3/64-in right stab tiltthats right side up looking rearl/16-in washout trailing edge both wing tips means 70%CG Pick calm morning hand-glide plane everything specified will have long flat right glide within paper shim two Before make first power flight double check timer proper shutoff time put fuse dont overlap rubberband much pinch fire out Always check stab key see its down dont youll likely picking model back side Enough said test flew model built ar ticle after aged about three months like take long thing called work keeps getting way toys test went follows First flight prop forwards engine running full 4 seconds launched about 750 angle slightly right wind did half turn rolled out showed slightly tight right turn glide Sec ond flight 7 seconds full powerno Half Retracts Ten years ago Half-A fullhouse model retracts wasnt gleam mad mans eye tiny retracts thanks Robart accessory think-tank folks Offered tricycle retracts $2295 mains $1695 Price too break through Use standard retract servo Unit size about 1-5/8 x 7/8 Molded plastic low weight Robard 203 E Illinois Ave St Charles IL 60174 product review product review product review change just went higher Third flight 10 seconds full power removed about 1/64 built-in right turn model did about full turn nice transi tion didnt have use rudder tab model have use some oth er models especially doing VTO use little left-thrust little right tab model goes straight up falling off right wing As speed builds up tab takes effect model rolls right After three initial test flights completed 900 am decided run series flights since day Lake Elsinore looked like going good motor runs 9 10 sec onds using Cox 049 6D-3P Cox grey prop 40-40 Fox fuel motor tacs about 18500 rpm able make flights because very little drift through day After day testing just knew ready Thermal Thumbers Mini FAI Contest Lake Elsinore March 6 1977 contest flown five rounds 10-second engine runs 3-minute maxes end five rounds maxed out went two-man flyoff guess what Old RG short-fused himself thing wrong mod eljust pilot error Try Simplex think youll like FF Duration/Meuser continued page 37 warding way spend ones life bur geoning Peanut Scale Walnut Scale movements have feet sturdy stuff akin sand Scale Staffel bunch also enjoys col lecting trophies collected 25 Nats isnt uncommon Scale group identify itself staffel escadrille go whole trip will start calling other Captain What sis Lieutenant So-n-so theyll dress up World War Uno costumes etc sort hope no whatever will ball Present membership includes Peck Pardoe Mather assortment Hannans Noonan two bunch others live near San Diego per haps theyll let play too bring own ball Write Bob Peck Box 2498 La Mesa CA 92041 Bubble Machine Super Bubble Fac tory has become accepted useful convenient thermal detec tion aids good John Olden kamp found way improve thin edges plastic handle tend make uncomfortable hold adult extended periods time John epoxied some 3A-in soft balsa sheet handle carved sanded finger-fitting contour Adding reservoir capacity extended thermal hunting simply matter 92 Model Aviation Charles Mendenhall product review product review product review
Edition: Model Aviation - 1978/01
Page Numbers: 32, 33, 34, 91, 92
C C 0 This U latest version 049/051 competition free flight has scored prodigious number wins over past 12 years U Russ Backer THE SIMPLEX 300 came being least drafting board 1965 design solely have similar designs before certainly lot since Some later ones include Mel Schmidts Shocer Dennis Broncos Sal Taibis Orbiteer Dave Rounsvilles FAI Excelsior dead ringer Mike Hallums Star Seeker latest Jim Clem Country Boy Thanks Jim wont have work hard writing flying instructions time would get little upset time saw model other name now can say thanks helped prove type design good After Id hate find out after 12 years playing dam thing didnt fly Simplex 300 effort de sign clean simple quick-to-build consistent model rules time built three 5-minute flights 6 7 plane has good up 30 minutes number times until pilot goofed Category rules now model can 8-second engine run air has feel its still very com petitive Category II model Simplex 300 has very good rec ord although three fellows have ever really flown design Bob Patchin Tom Arriola myself model first saw action 1966 San Valeers Annual Bob built two models like build pairs because its faster always have backup ship Bob flown prior meet tested contest placed first fifth helped win Sweeps Bob placed second fourth times ran 17 30 minutes what Bob Tom could dig up record doesnt look too bad over 10-year period 1965 1975 1/2A have 16 firsts 11 seconds six thirds contributing five Open Sweeps three Junior Sweeps two high times Category II /2A record Category ROW record held up time number awards other classes model has come through big ger contests too West Coast Free Flight Championships 1970 1971 took seconds gas Bob Patchin came out closet week before 1972 FF Champs built Simplex 300 put new out-of-the box Cox went after both four maxes both put planes same downer got last part over fence poor Bob got chicken feathers fifth sixth No go 1973 returned 1974 first /2A lost model out sight winning flight about five minutes before end contest mate model came through against Mel Schmidt Shocer Max Men Annual 1974 both maxed out 930 am trying wait out other proved bad decision wind came upit really blew Mel put 333 body else probably would have put model away model went up up away over mountain won hard way Back building board 1975 FF Champs tried again fourth place gas could come up also entered gas little problem engine brake coming about 2 3 seconds Fortynine seconds later model hit ground Gadgets can problem would ever give upthats too simple have developed several different kinds 32 Model Aviation like build pairs because faster says Russ always have backup ship Simplex 300 gathered its initial first place San Valeers Annual back 1966 1/4 SO LE MED HARD BALSATOP SPARS SEE NOTE 4 1/16 SHT ONKI/I6 CIA S I/S DOWEL TAPER TIP SPARS TO 3/161/16 5 I/B HARD BALSABOTTOM CENTERCUT IN HALF SEE NOTE Sis REOD IlEif -___ ==---~ sD -_____ n WI 1W7WBWA~oW3WD S S/B T E C5/32SYKBOTTOM SPAR I/B 5 1/4MATCH TO WING PLATFORMI/lB SHT BOTTOM CENTER K2 I/3D PLYWOODTOP SPARS CUT FOR SHTMED HARD BALSAMED HARD BALSAI/lB S I/B HARD BALSA3/16 50 LE 4 RIBS ONLY450 4EZZZ N TIP SKID I/B PLYWOODW IS REOD TI S REOD AT DIHEDRAL-WING AND STAB TIP DETAIL -4 ON WIND AND ON TIP OF STAB W5 2 REOD WI AT BREAK STAB RIB 14REOD ZWB S REODI/lB SHT LIGHTC GRAIN flWD S REODr----. I/IS SHT GUSSETS B REODSEE NOTE SBOTTOM SPAR 3/35 5 S/lBI/B U I/S TE STK 12 W7 S REOD 2 REOD SHT BALSA B PLYWOOD ANT W3 S REOD--FlTPSP STAB TILTIP9FILLETS 2 SETSSEE NOTE SBALSAK3 T TURNREFW4SREODWY GREGG1/16 SHT BALSA~--HI SEE NOTE3 H2 ccWING PLATFORMNOTE GRAIN DIRECTION-LU1iJK4 I- TCH TO KS AND TE SYK11/ I/B 5 3/lB SPRUCEI~1F1F1 mmmri ri r r IA m FAIR IN STRIPKEY SLOT MATCH TO KI .sK5 I/lBXI/BSPRUCESTRIPSREOD.~\1ILiLALJLJHLJ [zjL~I LjI~gii FlPWP2P3P4P5P6P7 P8 P9101112STAB KEYS m4/I/1SEE NOTE I0E~TEARUDDER TAB REFTPSP PP4F5P6I/B PLYWOODI/B ANT BALSAI/lB SHT BALSA ......... PLYWOOD REF2P3 rnS0LT/..I/lBI/B TE STK -TOP VIEW P1 FUSELAGE BOX BBREFALK COVER I/lB SHT BALSA SODA STRAW mPWWITH ALUM TUBEP7P8P90ii2RUDDER I/lB SHY BALSA NOTE GRAIN DIRECTION WING DINEDRAL AT RIBW7i S A/3D V A/SPYLON I/B ANT TE SYKMEDIUM HARD BALSA NOTE GRAN DRECTION 4O04A0-PATTERNFRONT VIEW I/IA WASH OUT T E UP Pw H TIPS REF SEE NOTE IALUM WASHER EPOXY AAIMATCH DRILL FROM CDX TO TANK MOUNY4 USE I/B DIA DRILLcL. K5 FOR 256 BLIND NUTS PRESS IN PLACE AND EPOXY INCIDENCE BLOCK I/AK DIA MW SKID 2MATCH DRILL FROM TATONE TICKOFF MKS TIMER PLYWOOD CDX TO 049 OR 0511/32 DIA MW SKIDUSE I/S DIA DRILL FOR SAK BLIND NUTS PRESS IN4 MAKE NOTCHES FOR REAR TOP SPAR AFTER WIND IS COMPLETE CDX TANK MOUNTPLACE AND EPOXY NUTS PROTRUDE THROUGH TIMERUSE STRAIGHT EDGE AND SINGLE EDGED RAZOR BLADEDESIGNED AND DRAWN N C RUSS BACKER CDX 63 GRAY PROPPLATE SO GRIND FLUSH WITH FACE ED FOR PROPER DEPTH 3ALL WIRE HOOKS ARE MADE FROM PAPER CLIPSA MAKE SURE ALL KEYS RUN TRUE TO CENTER LINE IGINATED lABS BY N BACKER AND N PAYCHIN CA construction basic design has remained same Ive used profile box geodetic construction combina tions thereof latest box type symmetrical pylon rudder vortex tips wing stab pressurized fuel sys tem prop brake d Ia FAIthe whole nine yards version have dubbed Complex Im sure necessary chose basic 300 design article Simplex has built two sizes 300 350 basic difference airfoil thickness wing stab 300 10% 35% 350 8% 35% think 300 could thinned out 8% would get altitude affect glide too much long weight held 7 ounces Ive little trouble keeping latest models under 7 ounces because little extras plywood keys wire skids dope fuel proofing etc However models outlast originals much consistent Also high cost building materials pretty much forces go route Construction Wing Stab Simplex may built conventional way however use couple simple fixtures Ill tell aboui let decide yourself wing has flat center section will fit nicely model box can also built wing jig two time moving tip fixture out jig can build span want dihedral stays same wing jig made ood tips set dihedral angle 280 tips set piece ood held place screws set apart whatever center section span building Tape wing plan fixture cover waxed paper what ever youre ready start ipake full set rib templates 1/16 plywood Dont cut 1/16 X /8 Continued page 91 34 Model Aviation hardwood wing key fits recess made top platform Rear wing key consists plywood cutout engaging TE platform Details pop-up tail Note slot platform front key stab place rear key also holds eyelet fits its slot Front end neat compact Engine-run timer Tatone pinchoff typo Text describes timer mods originally suggested Sal Taibi Two ways go Bottom fuselage plane article top fuselage complex version ala FAI propeller brake pressure tank vortex tips wing stab recollections above article Simplex/Backer continued page 34 diagonal spar notch notch put after other construction complete Use straightedge single-edge razor blade Glue small stick razor blade set depth cut cut notches Pick good straight-grain dium-hard balsa center section spars lighter wood tips wing can completed except rear diag onal spar put after wing dry Raise trailing edge tips 1/16 block glue spars place will give washout need Everything else flat No warps please Because stabilizer flat can completed plan main thing keep light Fuselage first thing glue material pylon using mediumhard balsa sheet rudder use 1/16 sheet C-grain still use old model lacquer cement made Fullers works well nitrates sands well its getting hard find can also use Tite Bond Ambroid whatever pylon rudder drying cut out fireweall FW timer plate TP together can drill holes simultaneously Locate holes drilled using tank timer Use diameter drill 2-56 blind nuts sure check nuts threads fore press place Dont laughIve found some threads Before applying epoxy run screws theyre flush back blind nut keeps epoxy off threads blind nuts timer plate will protrude through youll have grind flush face Next cut out sides Ive found youre careful can cut sides top bottom out 1/16 X 4 X 36 sheet medium C-grain balsa use alumi num straightedge Cut off nose left side overlaps formers F3 butt glue timer plate TP Make sure right side up means check downthrust angles 2 per plan template made 1/32 plywood may benefi cial same left thrust Make tracing use carbon paper transfer outlines pylon rud der should dry now Sand 220 wet/dry sandpaper Now youre ready start assembly use simple holding alignment fixture made piece straight-cut pine X 2 X 32 draw center line 2-in face make -in wide saw cut end 1/16 wide cut other using top view fuse lage plan reference depths may draw top view fixture did cut plan glue fixture contact cement Take pylon draw line parallel bottom fuselage side slide pylon A-in slot Flush line top surface fixture make sure wing angle pylon 2 incidence Use small C-clamp hold pylon place same rudder Cut out F2 through F5 Align over fixture glue py lon sure check left-thrust angle time2 way tend little wild glue may want wax surface holding fixture sides dry set place Dont glue rudder Use clamp-style clothespin hold sides together Glue rudder after F6 through F9 place checking alignment pylon rudder piece monofilament line run around front back put fillets Fl drying cut slot top sheet pylon rudder glue place use flat weight top fuselage drying some pins necessary operation too dry remove fixture stall soda straws aluminum tube dethermalizer line sure overlaps go direction youll never get line pulled through line will hang up smallest lip Cut slots bottom sheet skid rudder glue bottom Put fuselage January 1978 91 3-book boxed set covers fastest racing mschines 3 4 5-view scale drawings color schemes markings construc tion performance dats pilots race results descriptive illustrated story 22 Unlimiteds 41 Formula ls 19 Sport Biplanes 8 AT6/SNJs current era plua over 90 great Thomp son Bendix Greve Goodyear racers 30s 40s Iua fabulous Schneider Cup floatp lanes 20s Pulitzer Racers Gordon Benne Racers lamous European racers way back first air race win ner 1909 Curtiss Golden Flyer- jtl A95 234 planes all t Quality printed 192 big 8 x 11 pages truly fine reference POSTAGE rur aviation library Order yours INCLUDED o Early Air Racera 3-vlewa 1909-29 . 495 O National Air Racers 3-views 29-49 0 Modem Air Racers 3-views 4975 495 Send Check Money Order PUBLICATIONS P0 05 2T24 VIP IOCOFITEE NEW VORS 14828 RETURN MAIL DELIVERY Name Street City StateZip back fixture weight pin After its dry remove fuselage fixture install spacer SP firewall FW Recheck down-thrust left-thrust angles use 5-minute epoxy job drying cut out keys stab mount wing platform parts install keys use straightedge laid against pylon rudder reference tilt stab mount 1 / l6 right turn Use 5-minute epoxy keys install wing platform keep square straight Sand out airplane prior installing keys stab mount skid wires etc entire ship now ready final sanding Silk firewall cover Japanese tissue Water shrink brush three four coats 50/50 nitrate dope fuel-proof put coat clear epoxy fuselage wing stab use airbrush spray two coats butyrate dope over nitrate ever may wish use clear epoxy whole plane plan use tissue trim numbers etc cut out put after first coat nitrate Timer Modifications found pinch-off timer new camera type moves quite slowly modify remov ing five six teeth main timer gear will snap off about h off fuel line gear teeth can removed Dremel tool 1 / 16-diameter cutter small pattern file will also work probably little safer also put piece plastic fuel line bumper pinch-off arm pre vent cutting fuel line check quite often also use piece material cut Dr Scholls foot pad behind timer face insulate timer en gine vibration idea courtesy Sal Taibi Testing Before flying check airplane care fully Again no warps please want 2 down-thrust 2 left-thrust 20 incidence wing 0 stab 3/64-in right stab tiltthats right side up looking rearl/16-in washout trailing edge both wing tips means 70%CG Pick calm morning hand-glide plane everything specified will have long flat right glide within paper shim two Before make first power flight double check timer proper shutoff time put fuse dont overlap rubberband much pinch fire out Always check stab key see its down dont youll likely picking model back side Enough said test flew model built ar ticle after aged about three months like take long thing called work keeps getting way toys test went follows First flight prop forwards engine running full 4 seconds launched about 750 angle slightly right wind did half turn rolled out showed slightly tight right turn glide Sec ond flight 7 seconds full powerno Half Retracts Ten years ago Half-A fullhouse model retracts wasnt gleam mad mans eye tiny retracts thanks Robart accessory think-tank folks Offered tricycle retracts $2295 mains $1695 Price too break through Use standard retract servo Unit size about 1-5/8 x 7/8 Molded plastic low weight Robard 203 E Illinois Ave St Charles IL 60174 product review product review product review change just went higher Third flight 10 seconds full power removed about 1/64 built-in right turn model did about full turn nice transi tion didnt have use rudder tab model have use some oth er models especially doing VTO use little left-thrust little right tab model goes straight up falling off right wing As speed builds up tab takes effect model rolls right After three initial test flights completed 900 am decided run series flights since day Lake Elsinore looked like going good motor runs 9 10 sec onds using Cox 049 6D-3P Cox grey prop 40-40 Fox fuel motor tacs about 18500 rpm able make flights because very little drift through day After day testing just knew ready Thermal Thumbers Mini FAI Contest Lake Elsinore March 6 1977 contest flown five rounds 10-second engine runs 3-minute maxes end five rounds maxed out went two-man flyoff guess what Old RG short-fused himself thing wrong mod eljust pilot error Try Simplex think youll like FF Duration/Meuser continued page 37 warding way spend ones life bur geoning Peanut Scale Walnut Scale movements have feet sturdy stuff akin sand Scale Staffel bunch also enjoys col lecting trophies collected 25 Nats isnt uncommon Scale group identify itself staffel escadrille go whole trip will start calling other Captain What sis Lieutenant So-n-so theyll dress up World War Uno costumes etc sort hope no whatever will ball Present membership includes Peck Pardoe Mather assortment Hannans Noonan two bunch others live near San Diego per haps theyll let play too bring own ball Write Bob Peck Box 2498 La Mesa CA 92041 Bubble Machine Super Bubble Fac tory has become accepted useful convenient thermal detec tion aids good John Olden kamp found way improve thin edges plastic handle tend make uncomfortable hold adult extended periods time John epoxied some 3A-in soft balsa sheet handle carved sanded finger-fitting contour Adding reservoir capacity extended thermal hunting simply matter 92 Model Aviation Charles Mendenhall product review product review product review