Super Burp

F Ider three1l8mphE Mike 1972 Bill began work team first two years experience Bill sci aspect jet speed Sii have shared ideas Mike Langlois IL Bill Pardue codesigners airplane Mike pilot Bill pit man r ho fastest coi e United StaLes goals magic 200-mph del accom 1974 Nats ii record-br mph Since p nas established ma rds presently ho Open jet speed 21118 mph respe Super Burp v vith its des result much thc would mind tion however make sure something way b change Progress changes made article speed will absorb sented event whether plane presented ideas own plane Power Unit impossible jet speed well constructed power unit being defined system strong engi reach its true potential thru proper amount fuel Conversely Wi system will no use delivers jet engine c combustion powet within text has proven reliable fast Two quite different head designs let S5X Df success 60 Model Aviation photo shows different contour Series II head left Series head right being presented original seriesi extended head holds present Senior jet record 20493 mph held Open jet record 20563 mph before series 2 head also presented broke record flight 21118 mph series 2 head low drag head subsequently low static thrust producer head bit difficult Fin behind fuel line smooths air stream before enters venturiTNs front view shows offset engine allows fuel head Theory says airfoil 10 times thick round tube has sametoward inside circle As result positive fuel feed pres drag Note inlet cowling shapesure centrifugal force throughout flight December1978 61 because k fuel drawir nead difficult und Therefore o build series have vi ieries 6 mpn rly fib order U d additional t uction Th I head v step after K 5 cut roper lengt n can ma s glued out rac u ut cowling securely ml cowling Tn bni dir contouring y has cured neces paratus electric rotate sanding smooth finish also rem spots may have contoured during radius leading edge epoxy i ilso necess 1 ne uipped nded 1/4 ing up PC-7 epo rhe next step L e intake en d 4-20 b tock thre nto back th ith nut x zautious sc head Mount jaws ie threaded roc shaft slowly r Arill enable tn wet Iy V nt IiCX y %ire mi Grumman Guardian XTB3F-28 / Class Carrier IBy IgCatalog25cRog Edwards DERNISTIC MODELS PO BOX 6974 ALBUG NM 87197 HLG designs have also come long way since concepts 30s uld say progress has made recent years Could also said Sweepette Zipper HLG Someone care tackle Im no expert subject Anyway proved interesting diversion gitem ready next year fellas Youve got winter thumb through auld mags books Whats Name Its interesting note names attached various contests Northwest various clubs have established traditional meets unusual names Strat 0 Bats Seattle RAG Meet rubber glider Boeing Hawks Power Bash allpower contest prizes clear last place based 6-flight total Misery Meet held February under un usual weather conditions varying fog sunshine everything between meet approximately 20 years old about Silents Please spon sored Willamette Model Club Albany Oregon silence golden loudest sound tolerated woosh Jetex flap unwind ing OT rubber ship would interesting hear some Clubs out also have unique names contests dark about free flight USFFC Taft has offered night flying several years Just last year Power Bash event flown first time Northwest Bob Petro Athol Idaho having appropriate AMA gas ship flew Madewell-powered Clip per competition somewhat handicapped flying against AMA ships essentially dead air exciting hear old Madewell grinding skyward black night air chemical lights sold sporting goods stores can conveniently banded landing gear favorite OT ship can rig up flashlight bulb dry cell navigation lite Dont hook ignition circuit shut off light timer opens circuit Pick dark moonless night best re sults Use plenty light pit area avoid accidents Its eerie operate engine night Dont forget light DT fuse since can lift around night ground heated up during day night cool Its fascinating see light glow DT fuse spiraling upwardand silence engine quits light bobs around night sky Try Its great change pace Clarence Haught Ri 5 Box 16 Coeur dAlene ID 83814 Super Burp/Langlois continued page 62 hard piece wood make copy cowls shape Split form half cement piece hard wood about larger overall sec tion cowl Finish form base fiberglass resin polish high luster fiberglass cloth now layed up mold sure use good re lease agent first Best results obtained three layers iberglass cloth used resin has dried half cowl can pulled mold impos sible mold cowl unit unless air water pressure used force away mold after has cured molding cowl half time release problem solved both halves have fabricated necessary join Use small strips fiber glass cloth inside cowl well bit resin make good union two halves has dried re move rough edges sand smooth remaining operations turn back stock valve retainer fabricate back-up valves retainer may turned match plans lathe electric drill sure make contours smooth back-up valves simply valves have cut off 75% original radius can done cutting scissors after scribing correct diameter around spare valve retainer trueing diam eter using sanding belt grinding wheel sure remove burrs raised during operation lapping valves using oil 400 sandpaper smooth flat surface Valves may last 10 20 flights depending rich lean engine run sure beats prop glo plug flight will find jet actually economical control-line speed events maintain fly fabrication techniques series 2 head exactly same series head difference two heads material stand point addition reducing sleeve nose series 2 head will no discussion construction series 2 head because its similarities series 1 head word advice study plans take whatever time necessary good job Tail Pipe Selection choosing tail pipe keep mind impossible determine whether will run fast until actually flown airplane However few words advice may help select pipe will feel confident begin experimentations first area examine length length approximately 19-7/32 inches what record pipe measures however have seen longer pipes run fast com bustion chamber record pipe smaller other pipe have ever measured However say larger combustion chambers have worked some other combinations people prefer run new pipe con test pipe have set records about 20 years old selecting pipe look fat combustion chamber has small radius curvature combustion chamber conclusion steadfast advice can given about pipes keep trying different pipes until find best pipe particular combination inter esting note record breaking Super Burp 20563 mph airplane engine including valve retainer constructed use lathe electric drill theme Super Burp project beginning has go fast yet keep simple Anyone average workshop can build Super Burp Airframe Construction Begin fuel tank necessary materials needed construction fuel tank can purchased local hobby shop local specialty shop please use materials index appearing end article Start dismantling flashlight sand open end flashlight well switch area solder may flow out properly Next locate form will enable shape rear section tank properly pool stick works well cannot obtained will necessary locate alternative form fabri cate yourself After tank has formed locate solder vent pickup lines flashlight part tank Join front rear parts tank solder Having sealed rear portion tank time advis able boil tank water order remaining flux eliminated interior tank After tank has boiled checked proper line placement rear cap can formed soldered place Assuming head cowling have fabricated begin work engine mounting system text will concern itself installation engine setup presented word advice can given wishes use alternative mounting sys 114 Model Aviation CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049/051 Specialists brochure send 1 5c stamp Kustom Krattsmanship Brochure Box 2699 Laguna Hilts CA 92653 7141 B30-5162 / P N 342 42 cludes pressure fitting install desired Muffler can made shorter fit installation ONLYDU-DRO PRODUCTS INC CAT NO 235g.480 BONNER ROAD WAUCONDA ILLINOIS 6O08 tem should made strong enough easily withstand required 40-lb AMA pull-test Select rigid piece material engine head mounting bracket piece 060 stainless steel material equivalent strength will suffice Make pattern represents shape engine head mount presented plans Transfer shape mount onto material used fabricate mount Saw general shape mount hacksaw bandsaw Finish shaping mount file drill mounting holes such correspond holes drilled en gine head also drill holes affix mount airplane Bend mount engine located proper height above airplane fuselage now begun Select good hard piece pine basswood fuselage Make pattern fuselage shape transfer piece wood Saw out shape fuselage hollow such manner tank fits snugly proper place Also hollow rear section control movement fuselage has shaped hollowed properly fasten forward engine mounting bracket Start locating bracket proper place drilling holes fuse lage correspond holes mount groove out body blind nut placement Pull blind nuts position cement place Cement tank place using good quality epoxy cement secure tank wood glue has dried work begins fairing tank fuselage would best make fillets balsa wood interest time good epoxy filler will suffice Take necessary time needed contouring filleting fuselage will add con siderable strength durability airframe mention effects streamlining filleting con touring has done cover entire fuselage except wing fuselage cap strip stabilizer mounted iberglass cloth resin Install nose tail skids Bend skids contour lower fuselage make 900 bends end skids ends protrude approxi mately / inch fuselage care ful puncture fuel tank during operation Use good epoxy fasten skids fuselage wing construction select very rigid piece basswood pine poplar utmost importance wing rigid thin possible Furthermore rigidness should sac rificed because thinness considerable amount speed can lost wing flutter flex taking place record set ting airplane wings covered three layers fiberglass cloth since airplane has fabricatedan attempt improve wing strength rigidity After having selected proper size strength piece wood begin construction Start transferring outline wing onto chosen piece wood saw wood shape block sand edges remove irregularities outline Transfer center line wing split wing along line advis able utilize smallest blade collection because will make rejoining wing less difficult better both construction appearance Groove wing accept monoline unit control line attachment sure install both tip weight line bearing tip weight used takeoffs almost impossible model has tendency spin-in launch considers using takeoff dolly tip weight omitted Take necessary time make neat installation torque unit well making line groove proper size An airplane stiff control very difficult fly mention grief having spent much time airplane air worthy shaping airfoil also very important necessary have no positive negative incidence wing well no wash-in wash-out wing set up zero-zero rough finish shape sanding block used maintain contour throughout wing Finish sanding wing dium grit sandpaper Note center section wing left unairfoiled cause makes easier aligning mounting wing body Construction stabilizer much same wing Again rigid ness thinness alignment free-moving controls primary importance required discussion stab construc tion plastic hinges sacred have alternative hinging preference use it can considered equal strength Jet hinges usually have take abuse others because ground contacts may may shut engine off also unusually hard land ings inexperienced jet fliers fooled thinking ship still has gliding speed actually settling rapidly towards ground Begin assembly fabricating pushrod link torque unit elevator control mechanism pushiod fab ricated 3/32 music wire fitted Kwik Klip controls may adjusted Mount engine fuselage rubber band stabilizer wing approximate position fuselage Adjust wing location well stabilizer location balance /8 inch ahead CG location de noted plans Take note CG location references made relative wing fuselage December1978 115 - - V p IT LOOKS LIKE EXHAUST STACKBUT ITS REALLY MUFFLER pletely Universal Two muffler sizes fit 09 80 Adjustable stainless steel spring controls back pressure noise level NN3 Lightweight aluminum body tapered end- exits exhaust straight away plane SUPER CLEAN Classy looking black anodized body AMA WINGS ME AND MY RC 78 NATS 4 COLOR4 COLOR PERMISSION FROM AMA LUSIVE RIGHTSWhile Last FROM ROYAL CROWN COLA Green color Pattern Pylon Soaring Chopper Free Flight RC Widow Heavenly Sport RC Cherub Ukie Speed Rat Racer Combat Aerobatics choice white 50/50% polyester shirt navy trim $550 Postage FLI CAP 4 Color AMA Wines 5 M L Size Adjustable $550 Postage custom work clubsspecial events businesses Any size color print shirts jackets caps Information sent request FLI * HIRT 5132 DEL REY LAS VEGAS NEVADA 89102 proper balance achieved flying surfaces may glued place Use slow hardening epoxy glue cement wing stab place advisable dowel pin wing fuselage done drilling three 3/16 holes through center section wing about inch fuselage whereupon drilled holes fitted hard wood dowel pins glued place point wing stabilizer filleted fuselage Fiberglass recommended material rear cap strip added top rear fuselage contoured shape fuselage Fabricate rear engine mounting bracket bracket constructed 1/4 3-16 aluminum stock airfoiled shape bracket can mounted ways however suggested methods follows Drill mount ing bracket positions denoted plans 6-32 clearance drill also drill fuselage least center po sition way through bot tom point blind mounting nut pulled place hole has drilled way through body body must hollowed proper place accommodate blind nuts second method drill tap bracket two 6-32 machine screws body drilled way through clearance drill whereupon machine screws run up through fuselage thread bracket second method used record setting air plane equivalent strength method bit easier install pipe retaining clip formed 020 steel stock stainless steel stock Stain less steel stock preferred material because will rust dur able clip fastened bracket 4-40 machine screw Sand entire airplane smooth Fill nicks cracks holes filler resand have preferred finishing technique use provided fuel-proof finish record airplane two coats Hobbypoxy clear sanded between coats two coats Super Poxy color first coat being brushed sanded last coat just sprayed oni am sure would work very well After takeoff get pylon soon pos Flying fuel speed sible fly airplane near records have set 50% nitromethane perfect groove possible Jets much 50% propylene oxide although some susceptible extreme loss others have success varying speed due deviating perfect nitro-propyl ratio slightly possibly suit groove case propeller weather conditions given day aircraft number 46 081 dia drill size Good luck Super Burp metering jet seems work best have questions feel free contact series 1 head number 42 0935 Mike Langlois 2408 W Cornwallis dia series 2 head Drill 12 metering Dr Greensboro NC 27408 jets #42 thru #53 Larger metering jets can made Dooling needle valve fittings F F Duration/Meuser similar brass fittings long continued page 57 seat properly spray bar ring used seal Only trial error will determine metering jet size will work best particular engine airplane combina tion Make first flight attempts richest metering jet will run ship hand held ground engine cuts off after release try next size smaller metering jet until keeps run ning Usually rule upright engine design richer run faster go Uprights usually lean out start finish although uni flow fuel tank Super Burp tends minimize change 100% rule engine/airplane combina tion try leaning yours down metering jet after have run rich can start engine use truck tire pump source air Any other source compressed air will work equally well buzz box conjunction probe used supply spark needed ignite fuel-air mixture entering combustion chamber during ignition probe use electric stove oven element cut end will protrude approximate spark plug location tail pipe used element can ob tained local used furniture appliance store flying airplane make sure line taut takeoff ready pull airplane pitmans hand releases airplane can skidded off use dolly wish use properly designed dolly takeoff 116 Model Aviation Pirelli 1964 material gave 3520 whereas average Pirelli near 3300 Current FAT Supply rubber run ning 3545 excellent average new Pirelli confused Filati 1977 batch Filati tested out 1570 graph shows results some Freds recent tests Note fall-off tension new Pirelli grad ual other kinds rubber Fred points out too-rapid fall-off can treacherous torque falls off too rapidly model unable readjust its climb attitude rapidly enough result ing mushing stall shortly after launching test data shown meas ured during mid-1978 except 1972 Pirelli measured mid1977 Note 1977 FAT rubber slightly harder 1978 FAI rub ber specific energy about same Fred thinks rubber actually about same man ufactured difference simply typical effect aging Test curves 1977 material made during 1977 look about like 1978 test curves 1978 material Anybody know can get some 1977 Filati Id like have some give friends CO-2 Duration New Indoor Class Bob Bailey England writing eromodel

F Ider three1l8mphE Mike 1972 Bill began work team first two years experience Bill sci aspect jet speed Sii have shared ideas Mike Langlois IL Bill Pardue codesigners airplane Mike pilot Bill pit man r ho fastest coi e United StaLes goals magic 200-mph del accom 1974 Nats ii record-br mph Since p nas established ma rds presently ho Open jet speed 21118 mph respe Super Burp v vith its des result much thc would mind tion however make sure something way b change Progress changes made article speed will absorb sented event whether plane presented ideas own plane Power Unit impossible jet speed well constructed power unit being defined system strong engi reach its true potential thru proper amount fuel Conversely Wi system will no use delivers jet engine c combustion powet within text has proven reliable fast Two quite different head designs let S5X Df success 60 Model Aviation photo shows different contour Series II head left Series head right being presented original seriesi extended head holds present Senior jet record 20493 mph held Open jet record 20563 mph before series 2 head also presented broke record flight 21118 mph series 2 head low drag head subsequently low static thrust producer head bit difficult Fin behind fuel line smooths air stream before enters venturiTNs front view shows offset engine allows fuel head Theory says airfoil 10 times thick round tube has sametoward inside circle As result positive fuel feed pres drag Note inlet cowling shapesure centrifugal force throughout flight December1978 61 because k fuel drawir nead difficult und Therefore o build series have vi ieries 6 mpn rly fib order U d additional t uction Th I head v step after K 5 cut roper lengt n can ma s glued out rac u ut cowling securely ml cowling Tn bni dir contouring y has cured neces paratus electric rotate sanding smooth finish also rem spots may have contoured during radius leading edge epoxy i ilso necess 1 ne uipped nded 1/4 ing up PC-7 epo rhe next step L e intake en d 4-20 b tock thre nto back th ith nut x zautious sc head Mount jaws ie threaded roc shaft slowly r Arill enable tn wet Iy V nt IiCX y %ire mi Grumman Guardian XTB3F-28 / Class Carrier IBy IgCatalog25cRog Edwards DERNISTIC MODELS PO BOX 6974 ALBUG NM 87197 HLG designs have also come long way since concepts 30s uld say progress has made recent years Could also said Sweepette Zipper HLG Someone care tackle Im no expert subject Anyway proved interesting diversion gitem ready next year fellas Youve got winter thumb through auld mags books Whats Name Its interesting note names attached various contests Northwest various clubs have established traditional meets unusual names Strat 0 Bats Seattle RAG Meet rubber glider Boeing Hawks Power Bash allpower contest prizes clear last place based 6-flight total Misery Meet held February under un usual weather conditions varying fog sunshine everything between meet approximately 20 years old about Silents Please spon sored Willamette Model Club Albany Oregon silence golden loudest sound tolerated woosh Jetex flap unwind ing OT rubber ship would interesting hear some Clubs out also have unique names contests dark about free flight USFFC Taft has offered night flying several years Just last year Power Bash event flown first time Northwest Bob Petro Athol Idaho having appropriate AMA gas ship flew Madewell-powered Clip per competition somewhat handicapped flying against AMA ships essentially dead air exciting hear old Madewell grinding skyward black night air chemical lights sold sporting goods stores can conveniently banded landing gear favorite OT ship can rig up flashlight bulb dry cell navigation lite Dont hook ignition circuit shut off light timer opens circuit Pick dark moonless night best re sults Use plenty light pit area avoid accidents Its eerie operate engine night Dont forget light DT fuse since can lift around night ground heated up during day night cool Its fascinating see light glow DT fuse spiraling upwardand silence engine quits light bobs around night sky Try Its great change pace Clarence Haught Ri 5 Box 16 Coeur dAlene ID 83814 Super Burp/Langlois continued page 62 hard piece wood make copy cowls shape Split form half cement piece hard wood about larger overall sec tion cowl Finish form base fiberglass resin polish high luster fiberglass cloth now layed up mold sure use good re lease agent first Best results obtained three layers iberglass cloth used resin has dried half cowl can pulled mold impos sible mold cowl unit unless air water pressure used force away mold after has cured molding cowl half time release problem solved both halves have fabricated necessary join Use small strips fiber glass cloth inside cowl well bit resin make good union two halves has dried re move rough edges sand smooth remaining operations turn back stock valve retainer fabricate back-up valves retainer may turned match plans lathe electric drill sure make contours smooth back-up valves simply valves have cut off 75% original radius can done cutting scissors after scribing correct diameter around spare valve retainer trueing diam eter using sanding belt grinding wheel sure remove burrs raised during operation lapping valves using oil 400 sandpaper smooth flat surface Valves may last 10 20 flights depending rich lean engine run sure beats prop glo plug flight will find jet actually economical control-line speed events maintain fly fabrication techniques series 2 head exactly same series head difference two heads material stand point addition reducing sleeve nose series 2 head will no discussion construction series 2 head because its similarities series 1 head word advice study plans take whatever time necessary good job Tail Pipe Selection choosing tail pipe keep mind impossible determine whether will run fast until actually flown airplane However few words advice may help select pipe will feel confident begin experimentations first area examine length length approximately 19-7/32 inches what record pipe measures however have seen longer pipes run fast com bustion chamber record pipe smaller other pipe have ever measured However say larger combustion chambers have worked some other combinations people prefer run new pipe con test pipe have set records about 20 years old selecting pipe look fat combustion chamber has small radius curvature combustion chamber conclusion steadfast advice can given about pipes keep trying different pipes until find best pipe particular combination inter esting note record breaking Super Burp 20563 mph airplane engine including valve retainer constructed use lathe electric drill theme Super Burp project beginning has go fast yet keep simple Anyone average workshop can build Super Burp Airframe Construction Begin fuel tank necessary materials needed construction fuel tank can purchased local hobby shop local specialty shop please use materials index appearing end article Start dismantling flashlight sand open end flashlight well switch area solder may flow out properly Next locate form will enable shape rear section tank properly pool stick works well cannot obtained will necessary locate alternative form fabri cate yourself After tank has formed locate solder vent pickup lines flashlight part tank Join front rear parts tank solder Having sealed rear portion tank time advis able boil tank water order remaining flux eliminated interior tank After tank has boiled checked proper line placement rear cap can formed soldered place Assuming head cowling have fabricated begin work engine mounting system text will concern itself installation engine setup presented word advice can given wishes use alternative mounting sys 114 Model Aviation CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Cox 049/051 Specialists brochure send 1 5c stamp Kustom Krattsmanship Brochure Box 2699 Laguna Hilts CA 92653 7141 B30-5162 / P N 342 42 cludes pressure fitting install desired Muffler can made shorter fit installation ONLYDU-DRO PRODUCTS INC CAT NO 235g.480 BONNER ROAD WAUCONDA ILLINOIS 6O08 tem should made strong enough easily withstand required 40-lb AMA pull-test Select rigid piece material engine head mounting bracket piece 060 stainless steel material equivalent strength will suffice Make pattern represents shape engine head mount presented plans Transfer shape mount onto material used fabricate mount Saw general shape mount hacksaw bandsaw Finish shaping mount file drill mounting holes such correspond holes drilled en gine head also drill holes affix mount airplane Bend mount engine located proper height above airplane fuselage now begun Select good hard piece pine basswood fuselage Make pattern fuselage shape transfer piece wood Saw out shape fuselage hollow such manner tank fits snugly proper place Also hollow rear section control movement fuselage has shaped hollowed properly fasten forward engine mounting bracket Start locating bracket proper place drilling holes fuse lage correspond holes mount groove out body blind nut placement Pull blind nuts position cement place Cement tank place using good quality epoxy cement secure tank wood glue has dried work begins fairing tank fuselage would best make fillets balsa wood interest time good epoxy filler will suffice Take necessary time needed contouring filleting fuselage will add con siderable strength durability airframe mention effects streamlining filleting con touring has done cover entire fuselage except wing fuselage cap strip stabilizer mounted iberglass cloth resin Install nose tail skids Bend skids contour lower fuselage make 900 bends end skids ends protrude approxi mately / inch fuselage care ful puncture fuel tank during operation Use good epoxy fasten skids fuselage wing construction select very rigid piece basswood pine poplar utmost importance wing rigid thin possible Furthermore rigidness should sac rificed because thinness considerable amount speed can lost wing flutter flex taking place record set ting airplane wings covered three layers fiberglass cloth since airplane has fabricatedan attempt improve wing strength rigidity After having selected proper size strength piece wood begin construction Start transferring outline wing onto chosen piece wood saw wood shape block sand edges remove irregularities outline Transfer center line wing split wing along line advis able utilize smallest blade collection because will make rejoining wing less difficult better both construction appearance Groove wing accept monoline unit control line attachment sure install both tip weight line bearing tip weight used takeoffs almost impossible model has tendency spin-in launch considers using takeoff dolly tip weight omitted Take necessary time make neat installation torque unit well making line groove proper size An airplane stiff control very difficult fly mention grief having spent much time airplane air worthy shaping airfoil also very important necessary have no positive negative incidence wing well no wash-in wash-out wing set up zero-zero rough finish shape sanding block used maintain contour throughout wing Finish sanding wing dium grit sandpaper Note center section wing left unairfoiled cause makes easier aligning mounting wing body Construction stabilizer much same wing Again rigid ness thinness alignment free-moving controls primary importance required discussion stab construc tion plastic hinges sacred have alternative hinging preference use it can considered equal strength Jet hinges usually have take abuse others because ground contacts may may shut engine off also unusually hard land ings inexperienced jet fliers fooled thinking ship still has gliding speed actually settling rapidly towards ground Begin assembly fabricating pushrod link torque unit elevator control mechanism pushiod fab ricated 3/32 music wire fitted Kwik Klip controls may adjusted Mount engine fuselage rubber band stabilizer wing approximate position fuselage Adjust wing location well stabilizer location balance /8 inch ahead CG location de noted plans Take note CG location references made relative wing fuselage December1978 115 - - V p IT LOOKS LIKE EXHAUST STACKBUT ITS REALLY MUFFLER pletely Universal Two muffler sizes fit 09 80 Adjustable stainless steel spring controls back pressure noise level NN3 Lightweight aluminum body tapered end- exits exhaust straight away plane SUPER CLEAN Classy looking black anodized body AMA WINGS ME AND MY RC 78 NATS 4 COLOR4 COLOR PERMISSION FROM AMA LUSIVE RIGHTSWhile Last FROM ROYAL CROWN COLA Green color Pattern Pylon Soaring Chopper Free Flight RC Widow Heavenly Sport RC Cherub Ukie Speed Rat Racer Combat Aerobatics choice white 50/50% polyester shirt navy trim $550 Postage FLI CAP 4 Color AMA Wines 5 M L Size Adjustable $550 Postage custom work clubsspecial events businesses Any size color print shirts jackets caps Information sent request FLI * HIRT 5132 DEL REY LAS VEGAS NEVADA 89102 proper balance achieved flying surfaces may glued place Use slow hardening epoxy glue cement wing stab place advisable dowel pin wing fuselage done drilling three 3/16 holes through center section wing about inch fuselage whereupon drilled holes fitted hard wood dowel pins glued place point wing stabilizer filleted fuselage Fiberglass recommended material rear cap strip added top rear fuselage contoured shape fuselage Fabricate rear engine mounting bracket bracket constructed 1/4 3-16 aluminum stock airfoiled shape bracket can mounted ways however suggested methods follows Drill mount ing bracket positions denoted plans 6-32 clearance drill also drill fuselage least center po sition way through bot tom point blind mounting nut pulled place hole has drilled way through body body must hollowed proper place accommodate blind nuts second method drill tap bracket two 6-32 machine screws body drilled way through clearance drill whereupon machine screws run up through fuselage thread bracket second method used record setting air plane equivalent strength method bit easier install pipe retaining clip formed 020 steel stock stainless steel stock Stain less steel stock preferred material because will rust dur able clip fastened bracket 4-40 machine screw Sand entire airplane smooth Fill nicks cracks holes filler resand have preferred finishing technique use provided fuel-proof finish record airplane two coats Hobbypoxy clear sanded between coats two coats Super Poxy color first coat being brushed sanded last coat just sprayed oni am sure would work very well After takeoff get pylon soon pos Flying fuel speed sible fly airplane near records have set 50% nitromethane perfect groove possible Jets much 50% propylene oxide although some susceptible extreme loss others have success varying speed due deviating perfect nitro-propyl ratio slightly possibly suit groove case propeller weather conditions given day aircraft number 46 081 dia drill size Good luck Super Burp metering jet seems work best have questions feel free contact series 1 head number 42 0935 Mike Langlois 2408 W Cornwallis dia series 2 head Drill 12 metering Dr Greensboro NC 27408 jets #42 thru #53 Larger metering jets can made Dooling needle valve fittings F F Duration/Meuser similar brass fittings long continued page 57 seat properly spray bar ring used seal Only trial error will determine metering jet size will work best particular engine airplane combina tion Make first flight attempts richest metering jet will run ship hand held ground engine cuts off after release try next size smaller metering jet until keeps run ning Usually rule upright engine design richer run faster go Uprights usually lean out start finish although uni flow fuel tank Super Burp tends minimize change 100% rule engine/airplane combina tion try leaning yours down metering jet after have run rich can start engine use truck tire pump source air Any other source compressed air will work equally well buzz box conjunction probe used supply spark needed ignite fuel-air mixture entering combustion chamber during ignition probe use electric stove oven element cut end will protrude approximate spark plug location tail pipe used element can ob tained local used furniture appliance store flying airplane make sure line taut takeoff ready pull airplane pitmans hand releases airplane can skidded off use dolly wish use properly designed dolly takeoff 116 Model Aviation Pirelli 1964 material gave 3520 whereas average Pirelli near 3300 Current FAT Supply rubber run ning 3545 excellent average new Pirelli confused Filati 1977 batch Filati tested out 1570 graph shows results some Freds recent tests Note fall-off tension new Pirelli grad ual other kinds rubber Fred points out too-rapid fall-off can treacherous torque falls off too rapidly model unable readjust its climb attitude rapidly enough result ing mushing stall shortly after launching test data shown meas ured during mid-1978 except 1972 Pirelli measured mid1977 Note 1977 FAT rubber slightly harder 1978 FAI rub ber specific energy about same Fred thinks rubber actually about same man ufactured difference simply typical effect aging Test curves 1977 material made during 1977 look about like 1978 test curves 1978 material Anybody know can get some 1977 Filati Id like have some give friends CO-2 Duration New Indoor Class Bob Bailey England writing eromodel