T HE INCENTIVE write column wanes time year rain cold weather mean end speed flying around Maybe Ill able visit some Texas California contests retire Sure like warm weather flying supposed Speed column Ill try new engine review change like 21 Sport Speed have several older Rossi engines plus couple other brands Rossi seems competitive time some mad money lying around decided call Bill McGraw get newer versions Several years ago Bill son excellent Speed competitors Bill now runs boats using Rossi engines imports sells Using Novarossi TOP engine has set several world records boats engine sounded interesting enough ordered despite much higher price certainly isnt cheap neither Nelson OS OPS other competitive engines Bill didnt have aero version parts convert car engine airplane type big difference IC ONTROL LINE crankshaft car version extended take flywheel clutch etc large rectangular cooling fins wouldnt fit cowl no big deal trim Bill also exchanged conrod lighter newer streamlined diamond-shaped cross section doubt makes much difference engines performance hasnt other engine have tried Ill try engine has same mounting dimensions Rossi dropped right Speed job dont use part intake restrictor venturi remote needle-valve assembly mounted pan behind engine fabricate spraybar put fuel intake just brass tube another tube soldered end 900 hole spray fuel forward hard part making prop driver SPEED ner-backplate piece fit locking collet crankshaft piston fit tightsqueaky tight ran few bladders fuel through engine before flying Dayton contest made impressive nasty noise running new APC 65 x 6 props first flight wasnt too great engine just too tight unload way should Bill McGraw said engines need lot running suddenly get proper fit go faster Ill work before next year TOP heavy eagine using onepiece crankcase lots reinforcing cooling fins two high-rpm-type ball bearings plastic retainers support crankshaft bypasses massive Continued page 169 April 1993 101 p Rediscovering fun camaraderie old days Frank Garzon seated eats wife Fran works tabulating 92 Cincinnati Ohio fliers Earl Price asymmetrical AMA Nationals Fran will Speed Event Director 93 Nationals 1kA job Ken Barthel 21 Sport Speed Without volunteers like would no Nationals Carlos Aloise test runs Formula 40 wife Connie runs FAI fliers Cold Cash Speed Bash included Bill Johanson starter Starter features sturdy legs stability large handle Billy Hughes Carl Dodge Ed Gifford Canadians Paul allow quick removal engine fires up Gibeault Ron Peter standing order U 5a NO MORE WORRY ABOUT CRITICAL RADIO PLUGS BECOMING DISCONNECTED WHEN YOU USE THIS NEW WELL DESIGNED SAFETY ITEM Pl 9 Safety Ass PROVIDES POSITIVE SECURELY LOCKED CONNECTION SNAP ACTION PROVIDES FOR QUICK AND EASY INSTALLATION AND REMOVAL OF THE SAFETY CLIP WHEN YOU UNPLUG THE CLIP CAN BE INSTALLED ON THE LARGER PORTION OF THE PLUG FOR SAFEKEEPING FOR USE ON PLANES HELICOPTERS CARS AND BOATS CONSTRUCTED OF NYLON FOR LIFETIME USE THREE SAFETY CLIPS SUPPLIED PER PACKAGE FOR USE ON BATTERY PACK AND AILERON PLUGS OR OTHER EXTENSIONS PACKAGE PRICE 9 SEE YOUR LOCAL HOBBY DEALER SAFETY CLIPS AVAILABLE FOR THE FOLLOWING PLUGS Airtronics Aristocraft 5 Slim Cirrus C Cos Futaba J Hitec JR Kyosho B UY PACK TO G UARD AGAINST IMPACT PdI-5on PmductH RO Box B2038 Baton Rouge LA 70684-2038 CL SpeedlLee Continued page 101 quite deep exhaust port beveled streamlined allow unrestricted flow gases rectangular exhaust opening sleeve round 0-ring-sealed minipipe Almost latest high-performance trucks know utilized such machin ing relief crankcase opposite intake opening relief increases clearance between rotating shaft case reducing viscous drag oil fuel Areas around intake opening just behind front bearing close-fitting course retain craakcase compression small radial hole crankshaft opposite slightly behind intake opening allows oil thrown out make sure area between ball bearings lubricated small hole crankcase allows some oil flow intake forward front bearing large hole drilled crankshaft offset side opposite intake port leave wall thicker around opening Most crank failures occur crack starts corner intake opening TOP has rounded corners area eliminate stress concentration beginning crankshaft holethe end conrod clearsis beveled side opposite crank pin so-called turbo crank bevel will supposedly throw incoming fuel-air charge out case acting like turbocharger wonder bow much effect really has chrome-plated brass sleeve unlike Ive ever seen before has 10 bypass ports large exhaust port exhaust port wide top encompassing about 900 bore circumference tapers bottom angle formed matches angle bypass case side exhaust port very narrow long port similar Perry directional port top edge Schnuerle ports two Schnuerle ports typical except top edge beveled upward slight angle Most other engines have ports top edge 90 Continued page 172 CENTURY JET MODELS INC 8 Martha Ct8305 Regency Woods Way Sumter SC 29150Louisville KY 40220 803 775-6491502 491-4114 RETRACT SELECTOR SPEED CONTROL VALVE Four Infinite Adjustment Screws 2 Up 2 Down Compatible air system Dim 3/B xls 1-1/4$2495 Wt 15 oz Semi & Deluxe Ducted Fan Jet Kits Epoxy fiberglass fuselage canopy foam wings plans/ instructions Intake/Exhaust System exc F-too F-100 Hun basic kit $18999 1/8 Scale 50 Removable Wings Length 63 Sport Hawk MK II basic kit $18988 Easy buildl vable wing Length 59 F-105 Thunderchief basic kit $23900 Length 73 1 Engine No Cheater Hole P-4 Phantom basic kit $59900 P&H NEW 1/7 Scale Twin Engine Aileron/Spoiler Config Length 00 vable 61 Wings LE/TE flaps Deluse kit DC wood I/B pylons CF kit plus morel Landing gear tires brakes available COMPARE OUR RETRACTS TO THEIRS Stainless Struts cut FREEl lete Air System Stainless Torque Linkol Installed Different strut configurations s Service * 1 Year Limited Warranty 30 Day Refund GIANT MAIN RETRACTS STANDARD OR 900 ROTATE 30-50 lb aircraft 2 sets 1 Standard 900 minutes 70 1100 retract angle Over-center lock down Nose gear available $27500 pair Wt 15 lbs 1/5 SCALE MAIN RETRACTS STANDARD OR 900 ROTATE Fits PICA Skys P-Si 1/5 Yellow A/C Ziroli Bud Noses plus Choice 91 Plyon Winners Handles 20-25 lb aircraft 8497 retract angle Positive lock up lock down Optional wire struts Nose gear available $19900 pair WI 22 oz NEW 1/5 SCALE P-Si & SPITFIRE poducts proudly MADE IN THE USA April 1993 169 SCALE DOCUMENTATION are/AntiqUe/CIassic Aircraft tsssu 01 pholon 1000 01 3-mews 927 S Reed Lak weed CO 80226 K rarauniqunann hind nalistacliun gusianteed uaiaiug $200 US iiudn AT LAST Z-BEST ENGINE CLEANER An Effective High Tech Engine Cleaner B/C Engines Removes Burnedon Fuel Residue 141W Encrusted Carhon Build-up Any Bare Metal Engine Outside oZBESTCIeaus Mufflers Tuned Pipes Headers I53dzoat Inside ~oo', akbieg wont Harm ur Discolor Metal Four Ounces wilt Clean 10-15 Engines Clean Engines Run Cooler Lust Longed $2005&HCAR25%taxDiseBy send check moneyAIRBORNE HOBBIES order ask local 3764 30th St San Diego CA 92104 dealerM/C800-3920505 VISA R/C BEGINNERS hobby loses about half Its potentIal f)ers because tao successfuly solo T SNT THEIR FAULT ITS THE PLANES FAULT lust some rnQst advert sed traners impossbe average begOnner soo wth seems norm crash run 4 5 planes before becomng successful Ths s both stupd costy menton real turnotf tor new student qute unnecessary YOU COULD SOLO YOUR FIRST TIME UP Thanks extensOve traner flOght testng ever conducted ths hobby can now know advanct whch ones fly slow handsoff stable easy enough Grandma whch lust so-so ntermedate whOch ones deserve traner abe Send $350 pus 52 postage EASE-OFFLYING RATINGS OF RIC TRAINERS Over 40 currenty ava)abe tran ers evauated noludOng ARFs Also grades ease of-buldng expans traner aerodynamOcs dares address questons poor trainersthan good traners marketed does no warn about Guarantee money back say thOs Os eye-openOng candid enlOght enOng tOme-savOng money-saving trustratOon sparOng R/C pubOOcation have ever read Send check sr money order Jim Waterman 3818 fleertield Dr San Antenin TX 78218 B&P Associates Gives Total Flight Line FREEDOM battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 FLoRIo FLYER Yankee Twister Specifications Wing Span 48 Wing Area 850 sq Engine Size 25 35 Design Wgt 3 375 lbs Minimum Channels Required 3 $9995 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field FUN-FLY FORCE! tunt Wagon Specifications Wing Span 50 Wing Area 788 sq nChannels~ ine Size 2510 40 flAsign Wgt 3104 lbs 4 $7995 Coal Hauler Speofications Wing Span 48 Wing Area 820 sq Engine Size 25 40 Design Wgt 275 35 lbs Minimum Channels Required 3 THE FLORIO FLYER CORP PO Box 88 Dagus Mines PA 15831 VISA/Mastercard accepted PH 814 885-8360 814 781-3480 Dealer/Distributor Inquiries InvIted- PA Residents add 6% Sales Tax Add $475 S&H per Kit Send $199 Complete Florlo FIVer ESERVING THE FUN-FLY TRADITIONTM FEATHER CUT creates new standard ease accuracy cutting white blue foam wing cores s off Precise single wire tracking concert micro-adjustable balance weights guided exclusive three-point tracking system guarantees ripple-free surfaces No trailing edge burn-out common two wire systems Couple FEATHER CUT Tekoas THERMAL GENERATOR fool proof temperature control youll Pro st time out Cuts straight taper wings fins stabilizers matically ts tape edge workbench dining table stores its own heavy duty mailing tube lete kit anodized plated components no hardware store trips u Instructions include cutting first wing making templates 28 Fold Bow 40 52 Available Power supply required Guaranteed out perform rest Simply best THE CENTER OF 31 d~ LA ad 172 Model Aviation peedlLee Continued page 169 sleeve centerline direct incoming charge straight across piston dont know method superior since 28000 rpm ports open less 0001 second anyway Two boost ports directly across exhaust port angled slightly towards center top edges beveled upward about 450 Another narrow port located side between boost port Schnuerle port four narrow ports about 040-in wide 400-in long Apparently let some fuel-air charge out beneath piston since bottom part slots open piston near top stroke Two small ports about 5A2-in wide directly under Schnuerle ports match two holes side piston near bottom stroke apparently vent underside piston increased cooling well allowing charge bypass Timing doesnt seem radical top edge exhaust port level center stays open l68 ends 1620 eight bypass ports open 128 crankshaft intake port opens about 350 ABDC after bottom dead center closes 580 ATDC after top dead center piston looks like typical highsilicon casting half-moon cutout front skirt clear crank BDC allows incoming charge get boost bypass top edge beveled fit taper sleeve reduce break-in time wrist pin held two circlips bore-to-stroke ratio closer square engines being built today bore being 648 stroke 645 doesnt seem bother high-revving capabilities however head fits about 150-in deep sleeve two-piece design like Rossi except clamp flange extends out full diameter head chamber relatively small 365-in diameter deep 136 wide squish band has slight taper avoid hydraulic lock piston TDC black anodized clamp ring held four metric-head bolts backplate has circular groove cut piston skirt doesnt hit BDC sealed case 0-ring reassemble engine make sure have groove top What modifications will make before next spring Well might open crank close nearer 700 ATDC might attempt fit piston little loosely might tricky its very easy make piston too loose Ive other instances modifications made instant junk new airplane might bigger improvement Maybe Ill try 28% silicon piston Next time Ill expound theory piston fits 10% nitro fuel avy CarrierlPerry Continued page 106 reliable source No injured fortunately spring end tube way cushion impact preserve structural integrity wing scheme described above works very well adds complexity sliding weight cant adjusted trim model slow flight wanted system easy adjust weight boxes lead shot installations Ive described previous columns also wanted system easy construct automatic operation Almost objectives achieved system isnt completely automatic weight must reset before flight required however hold wing vertical outboard tip up gently shake model about 10 seconds consider success system uses lead shot movable weight weight box wing tip basi cally same described previously Another weight box located center wing -in-diameter nylon screw weight boxes serves plug through lead shot added removed adjust weight thin-wall aluminum tube connects two weight boxes tube enters central box flush outboard side near front box high enough shot will below opening tube model its normal resting position outboard wall floor center box angled shot will roll toward tube under effects normal centripetal force encountered flight Operation simple shot starts out center box model released shot forced rear center box models forward acceleration model tracks straight ahead because tip weight center section wing tip As forward acceleration slows centripetal acceleration increases shot starts its migration toward opening tube gets falls through tube weight box wing tip time high-speed flight finished shot tip box performs its usual function during slow flight Number-nine shot 008-in diameter best choice because its small sizeit flows easier through fill hole through interual tube individual pellet also exerts less force hits bottom tip box Because shot traveling about 30 mph completes its trip should piece hardwood aluminum nylon etc tip box absorb energy shot damage use threaded nylon block holds access top champions purchase Precision Built models 1 Winning designs 1990 TOC 1st 2nd 3rd 5th 7 2 lightest airtrames availahie light wings Mod4ls Aeailgable EXTRA 260 STEPHENS AKRO ULTIMATE LASER 200 -A really can fly better better built airplane 4476 US HWY 281 N PRECISION BUILT INC spwvo BRANCH rx 78070512_438-3330 SNAP ROLL TEL YOU DIE LANDER RCs LASER CAT NO 87205 THE ORIGINATORS OF ALMOST-READY-TO-FLY AIRCRAFT MADE OF PLASTIC AND FOAM Fuselage Length 44 Rec Engine Size 45-60 60-120 4 Stroke Flying Weight 6-7 lbs Wing Span 60 Area 620 sq Radio Channels 4 Available favorite Hobby Deaier Replacement parts available Dealer distributor inquiries invited Write today free color catalog PO Box 458 Oakwood Georgia 30566 Made USA Snap Tight Hinge smooth free nylon piano wire hinge modeler can construct knuckle type hinge surface quiet operation scale like appearance Easy install 404-532-6401 control surfaces may removed tor finishing repair EIIIZIIID Allows tor considerable deflection L4 cONTROL SURFACE 12 hinges per package$395 per package Two Sizes Small No FOR 144 Large No FOR 145 Fourmost Products Check local hobby shop other great model products trom Fourmost April 1993 173 PAECISIOAI uILr name promise I
Edition: Model Aviation - 1993/04
Page Numbers: 101, 169, 172, 173
T HE INCENTIVE write column wanes time year rain cold weather mean end speed flying around Maybe Ill able visit some Texas California contests retire Sure like warm weather flying supposed Speed column Ill try new engine review change like 21 Sport Speed have several older Rossi engines plus couple other brands Rossi seems competitive time some mad money lying around decided call Bill McGraw get newer versions Several years ago Bill son excellent Speed competitors Bill now runs boats using Rossi engines imports sells Using Novarossi TOP engine has set several world records boats engine sounded interesting enough ordered despite much higher price certainly isnt cheap neither Nelson OS OPS other competitive engines Bill didnt have aero version parts convert car engine airplane type big difference IC ONTROL LINE crankshaft car version extended take flywheel clutch etc large rectangular cooling fins wouldnt fit cowl no big deal trim Bill also exchanged conrod lighter newer streamlined diamond-shaped cross section doubt makes much difference engines performance hasnt other engine have tried Ill try engine has same mounting dimensions Rossi dropped right Speed job dont use part intake restrictor venturi remote needle-valve assembly mounted pan behind engine fabricate spraybar put fuel intake just brass tube another tube soldered end 900 hole spray fuel forward hard part making prop driver SPEED ner-backplate piece fit locking collet crankshaft piston fit tightsqueaky tight ran few bladders fuel through engine before flying Dayton contest made impressive nasty noise running new APC 65 x 6 props first flight wasnt too great engine just too tight unload way should Bill McGraw said engines need lot running suddenly get proper fit go faster Ill work before next year TOP heavy eagine using onepiece crankcase lots reinforcing cooling fins two high-rpm-type ball bearings plastic retainers support crankshaft bypasses massive Continued page 169 April 1993 101 p Rediscovering fun camaraderie old days Frank Garzon seated eats wife Fran works tabulating 92 Cincinnati Ohio fliers Earl Price asymmetrical AMA Nationals Fran will Speed Event Director 93 Nationals 1kA job Ken Barthel 21 Sport Speed Without volunteers like would no Nationals Carlos Aloise test runs Formula 40 wife Connie runs FAI fliers Cold Cash Speed Bash included Bill Johanson starter Starter features sturdy legs stability large handle Billy Hughes Carl Dodge Ed Gifford Canadians Paul allow quick removal engine fires up Gibeault Ron Peter standing order U 5a NO MORE WORRY ABOUT CRITICAL RADIO PLUGS BECOMING DISCONNECTED WHEN YOU USE THIS NEW WELL DESIGNED SAFETY ITEM Pl 9 Safety Ass PROVIDES POSITIVE SECURELY LOCKED CONNECTION SNAP ACTION PROVIDES FOR QUICK AND EASY INSTALLATION AND REMOVAL OF THE SAFETY CLIP WHEN YOU UNPLUG THE CLIP CAN BE INSTALLED ON THE LARGER PORTION OF THE PLUG FOR SAFEKEEPING FOR USE ON PLANES HELICOPTERS CARS AND BOATS CONSTRUCTED OF NYLON FOR LIFETIME USE THREE SAFETY CLIPS SUPPLIED PER PACKAGE FOR USE ON BATTERY PACK AND AILERON PLUGS OR OTHER EXTENSIONS PACKAGE PRICE 9 SEE YOUR LOCAL HOBBY DEALER SAFETY CLIPS AVAILABLE FOR THE FOLLOWING PLUGS Airtronics Aristocraft 5 Slim Cirrus C Cos Futaba J Hitec JR Kyosho B UY PACK TO G UARD AGAINST IMPACT PdI-5on PmductH RO Box B2038 Baton Rouge LA 70684-2038 CL SpeedlLee Continued page 101 quite deep exhaust port beveled streamlined allow unrestricted flow gases rectangular exhaust opening sleeve round 0-ring-sealed minipipe Almost latest high-performance trucks know utilized such machin ing relief crankcase opposite intake opening relief increases clearance between rotating shaft case reducing viscous drag oil fuel Areas around intake opening just behind front bearing close-fitting course retain craakcase compression small radial hole crankshaft opposite slightly behind intake opening allows oil thrown out make sure area between ball bearings lubricated small hole crankcase allows some oil flow intake forward front bearing large hole drilled crankshaft offset side opposite intake port leave wall thicker around opening Most crank failures occur crack starts corner intake opening TOP has rounded corners area eliminate stress concentration beginning crankshaft holethe end conrod clearsis beveled side opposite crank pin so-called turbo crank bevel will supposedly throw incoming fuel-air charge out case acting like turbocharger wonder bow much effect really has chrome-plated brass sleeve unlike Ive ever seen before has 10 bypass ports large exhaust port exhaust port wide top encompassing about 900 bore circumference tapers bottom angle formed matches angle bypass case side exhaust port very narrow long port similar Perry directional port top edge Schnuerle ports two Schnuerle ports typical except top edge beveled upward slight angle Most other engines have ports top edge 90 Continued page 172 CENTURY JET MODELS INC 8 Martha Ct8305 Regency Woods Way Sumter SC 29150Louisville KY 40220 803 775-6491502 491-4114 RETRACT SELECTOR SPEED CONTROL VALVE Four Infinite Adjustment Screws 2 Up 2 Down Compatible air system Dim 3/B xls 1-1/4$2495 Wt 15 oz Semi & Deluxe Ducted Fan Jet Kits Epoxy fiberglass fuselage canopy foam wings plans/ instructions Intake/Exhaust System exc F-too F-100 Hun basic kit $18999 1/8 Scale 50 Removable Wings Length 63 Sport Hawk MK II basic kit $18988 Easy buildl vable wing Length 59 F-105 Thunderchief basic kit $23900 Length 73 1 Engine No Cheater Hole P-4 Phantom basic kit $59900 P&H NEW 1/7 Scale Twin Engine Aileron/Spoiler Config Length 00 vable 61 Wings LE/TE flaps Deluse kit DC wood I/B pylons CF kit plus morel Landing gear tires brakes available COMPARE OUR RETRACTS TO THEIRS Stainless Struts cut FREEl lete Air System Stainless Torque Linkol Installed Different strut configurations s Service * 1 Year Limited Warranty 30 Day Refund GIANT MAIN RETRACTS STANDARD OR 900 ROTATE 30-50 lb aircraft 2 sets 1 Standard 900 minutes 70 1100 retract angle Over-center lock down Nose gear available $27500 pair Wt 15 lbs 1/5 SCALE MAIN RETRACTS STANDARD OR 900 ROTATE Fits PICA Skys P-Si 1/5 Yellow A/C Ziroli Bud Noses plus Choice 91 Plyon Winners Handles 20-25 lb aircraft 8497 retract angle Positive lock up lock down Optional wire struts Nose gear available $19900 pair WI 22 oz NEW 1/5 SCALE P-Si & SPITFIRE poducts proudly MADE IN THE USA April 1993 169 SCALE DOCUMENTATION are/AntiqUe/CIassic Aircraft tsssu 01 pholon 1000 01 3-mews 927 S Reed Lak weed CO 80226 K rarauniqunann hind nalistacliun gusianteed uaiaiug $200 US iiudn AT LAST Z-BEST ENGINE CLEANER An Effective High Tech Engine Cleaner B/C Engines Removes Burnedon Fuel Residue 141W Encrusted Carhon Build-up Any Bare Metal Engine Outside oZBESTCIeaus Mufflers Tuned Pipes Headers I53dzoat Inside ~oo', akbieg wont Harm ur Discolor Metal Four Ounces wilt Clean 10-15 Engines Clean Engines Run Cooler Lust Longed $2005&HCAR25%taxDiseBy send check moneyAIRBORNE HOBBIES order ask local 3764 30th St San Diego CA 92104 dealerM/C800-3920505 VISA R/C BEGINNERS hobby loses about half Its potentIal f)ers because tao successfuly solo T SNT THEIR FAULT ITS THE PLANES FAULT lust some rnQst advert sed traners impossbe average begOnner soo wth seems norm crash run 4 5 planes before becomng successful Ths s both stupd costy menton real turnotf tor new student qute unnecessary YOU COULD SOLO YOUR FIRST TIME UP Thanks extensOve traner flOght testng ever conducted ths hobby can now know advanct whch ones fly slow handsoff stable easy enough Grandma whch lust so-so ntermedate whOch ones deserve traner abe Send $350 pus 52 postage EASE-OFFLYING RATINGS OF RIC TRAINERS Over 40 currenty ava)abe tran ers evauated noludOng ARFs Also grades ease of-buldng expans traner aerodynamOcs dares address questons poor trainersthan good traners marketed does no warn about Guarantee money back say thOs Os eye-openOng candid enlOght enOng tOme-savOng money-saving trustratOon sparOng R/C pubOOcation have ever read Send check sr money order Jim Waterman 3818 fleertield Dr San Antenin TX 78218 B&P Associates Gives Total Flight Line FREEDOM battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 FLoRIo FLYER Yankee Twister Specifications Wing Span 48 Wing Area 850 sq Engine Size 25 35 Design Wgt 3 375 lbs Minimum Channels Required 3 $9995 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field FUN-FLY FORCE! tunt Wagon Specifications Wing Span 50 Wing Area 788 sq nChannels~ ine Size 2510 40 flAsign Wgt 3104 lbs 4 $7995 Coal Hauler Speofications Wing Span 48 Wing Area 820 sq Engine Size 25 40 Design Wgt 275 35 lbs Minimum Channels Required 3 THE FLORIO FLYER CORP PO Box 88 Dagus Mines PA 15831 VISA/Mastercard accepted PH 814 885-8360 814 781-3480 Dealer/Distributor Inquiries InvIted- PA Residents add 6% Sales Tax Add $475 S&H per Kit Send $199 Complete Florlo FIVer ESERVING THE FUN-FLY TRADITIONTM FEATHER CUT creates new standard ease accuracy cutting white blue foam wing cores s off Precise single wire tracking concert micro-adjustable balance weights guided exclusive three-point tracking system guarantees ripple-free surfaces No trailing edge burn-out common two wire systems Couple FEATHER CUT Tekoas THERMAL GENERATOR fool proof temperature control youll Pro st time out Cuts straight taper wings fins stabilizers matically ts tape edge workbench dining table stores its own heavy duty mailing tube lete kit anodized plated components no hardware store trips u Instructions include cutting first wing making templates 28 Fold Bow 40 52 Available Power supply required Guaranteed out perform rest Simply best THE CENTER OF 31 d~ LA ad 172 Model Aviation peedlLee Continued page 169 sleeve centerline direct incoming charge straight across piston dont know method superior since 28000 rpm ports open less 0001 second anyway Two boost ports directly across exhaust port angled slightly towards center top edges beveled upward about 450 Another narrow port located side between boost port Schnuerle port four narrow ports about 040-in wide 400-in long Apparently let some fuel-air charge out beneath piston since bottom part slots open piston near top stroke Two small ports about 5A2-in wide directly under Schnuerle ports match two holes side piston near bottom stroke apparently vent underside piston increased cooling well allowing charge bypass Timing doesnt seem radical top edge exhaust port level center stays open l68 ends 1620 eight bypass ports open 128 crankshaft intake port opens about 350 ABDC after bottom dead center closes 580 ATDC after top dead center piston looks like typical highsilicon casting half-moon cutout front skirt clear crank BDC allows incoming charge get boost bypass top edge beveled fit taper sleeve reduce break-in time wrist pin held two circlips bore-to-stroke ratio closer square engines being built today bore being 648 stroke 645 doesnt seem bother high-revving capabilities however head fits about 150-in deep sleeve two-piece design like Rossi except clamp flange extends out full diameter head chamber relatively small 365-in diameter deep 136 wide squish band has slight taper avoid hydraulic lock piston TDC black anodized clamp ring held four metric-head bolts backplate has circular groove cut piston skirt doesnt hit BDC sealed case 0-ring reassemble engine make sure have groove top What modifications will make before next spring Well might open crank close nearer 700 ATDC might attempt fit piston little loosely might tricky its very easy make piston too loose Ive other instances modifications made instant junk new airplane might bigger improvement Maybe Ill try 28% silicon piston Next time Ill expound theory piston fits 10% nitro fuel avy CarrierlPerry Continued page 106 reliable source No injured fortunately spring end tube way cushion impact preserve structural integrity wing scheme described above works very well adds complexity sliding weight cant adjusted trim model slow flight wanted system easy adjust weight boxes lead shot installations Ive described previous columns also wanted system easy construct automatic operation Almost objectives achieved system isnt completely automatic weight must reset before flight required however hold wing vertical outboard tip up gently shake model about 10 seconds consider success system uses lead shot movable weight weight box wing tip basi cally same described previously Another weight box located center wing -in-diameter nylon screw weight boxes serves plug through lead shot added removed adjust weight thin-wall aluminum tube connects two weight boxes tube enters central box flush outboard side near front box high enough shot will below opening tube model its normal resting position outboard wall floor center box angled shot will roll toward tube under effects normal centripetal force encountered flight Operation simple shot starts out center box model released shot forced rear center box models forward acceleration model tracks straight ahead because tip weight center section wing tip As forward acceleration slows centripetal acceleration increases shot starts its migration toward opening tube gets falls through tube weight box wing tip time high-speed flight finished shot tip box performs its usual function during slow flight Number-nine shot 008-in diameter best choice because its small sizeit flows easier through fill hole through interual tube individual pellet also exerts less force hits bottom tip box Because shot traveling about 30 mph completes its trip should piece hardwood aluminum nylon etc tip box absorb energy shot damage use threaded nylon block holds access top champions purchase Precision Built models 1 Winning designs 1990 TOC 1st 2nd 3rd 5th 7 2 lightest airtrames availahie light wings Mod4ls Aeailgable EXTRA 260 STEPHENS AKRO ULTIMATE LASER 200 -A really can fly better better built airplane 4476 US HWY 281 N PRECISION BUILT INC spwvo BRANCH rx 78070512_438-3330 SNAP ROLL TEL YOU DIE LANDER RCs LASER CAT NO 87205 THE ORIGINATORS OF ALMOST-READY-TO-FLY AIRCRAFT MADE OF PLASTIC AND FOAM Fuselage Length 44 Rec Engine Size 45-60 60-120 4 Stroke Flying Weight 6-7 lbs Wing Span 60 Area 620 sq Radio Channels 4 Available favorite Hobby Deaier Replacement parts available Dealer distributor inquiries invited Write today free color catalog PO Box 458 Oakwood Georgia 30566 Made USA Snap Tight Hinge smooth free nylon piano wire hinge modeler can construct knuckle type hinge surface quiet operation scale like appearance Easy install 404-532-6401 control surfaces may removed tor finishing repair EIIIZIIID Allows tor considerable deflection L4 cONTROL SURFACE 12 hinges per package$395 per package Two Sizes Small No FOR 144 Large No FOR 145 Fourmost Products Check local hobby shop other great model products trom Fourmost April 1993 173 PAECISIOAI uILr name promise I
Edition: Model Aviation - 1993/04
Page Numbers: 101, 169, 172, 173
T HE INCENTIVE write column wanes time year rain cold weather mean end speed flying around Maybe Ill able visit some Texas California contests retire Sure like warm weather flying supposed Speed column Ill try new engine review change like 21 Sport Speed have several older Rossi engines plus couple other brands Rossi seems competitive time some mad money lying around decided call Bill McGraw get newer versions Several years ago Bill son excellent Speed competitors Bill now runs boats using Rossi engines imports sells Using Novarossi TOP engine has set several world records boats engine sounded interesting enough ordered despite much higher price certainly isnt cheap neither Nelson OS OPS other competitive engines Bill didnt have aero version parts convert car engine airplane type big difference IC ONTROL LINE crankshaft car version extended take flywheel clutch etc large rectangular cooling fins wouldnt fit cowl no big deal trim Bill also exchanged conrod lighter newer streamlined diamond-shaped cross section doubt makes much difference engines performance hasnt other engine have tried Ill try engine has same mounting dimensions Rossi dropped right Speed job dont use part intake restrictor venturi remote needle-valve assembly mounted pan behind engine fabricate spraybar put fuel intake just brass tube another tube soldered end 900 hole spray fuel forward hard part making prop driver SPEED ner-backplate piece fit locking collet crankshaft piston fit tightsqueaky tight ran few bladders fuel through engine before flying Dayton contest made impressive nasty noise running new APC 65 x 6 props first flight wasnt too great engine just too tight unload way should Bill McGraw said engines need lot running suddenly get proper fit go faster Ill work before next year TOP heavy eagine using onepiece crankcase lots reinforcing cooling fins two high-rpm-type ball bearings plastic retainers support crankshaft bypasses massive Continued page 169 April 1993 101 p Rediscovering fun camaraderie old days Frank Garzon seated eats wife Fran works tabulating 92 Cincinnati Ohio fliers Earl Price asymmetrical AMA Nationals Fran will Speed Event Director 93 Nationals 1kA job Ken Barthel 21 Sport Speed Without volunteers like would no Nationals Carlos Aloise test runs Formula 40 wife Connie runs FAI fliers Cold Cash Speed Bash included Bill Johanson starter Starter features sturdy legs stability large handle Billy Hughes Carl Dodge Ed Gifford Canadians Paul allow quick removal engine fires up Gibeault Ron Peter standing order U 5a NO MORE WORRY ABOUT CRITICAL RADIO PLUGS BECOMING DISCONNECTED WHEN YOU USE THIS NEW WELL DESIGNED SAFETY ITEM Pl 9 Safety Ass PROVIDES POSITIVE SECURELY LOCKED CONNECTION SNAP ACTION PROVIDES FOR QUICK AND EASY INSTALLATION AND REMOVAL OF THE SAFETY CLIP WHEN YOU UNPLUG THE CLIP CAN BE INSTALLED ON THE LARGER PORTION OF THE PLUG FOR SAFEKEEPING FOR USE ON PLANES HELICOPTERS CARS AND BOATS CONSTRUCTED OF NYLON FOR LIFETIME USE THREE SAFETY CLIPS SUPPLIED PER PACKAGE FOR USE ON BATTERY PACK AND AILERON PLUGS OR OTHER EXTENSIONS PACKAGE PRICE 9 SEE YOUR LOCAL HOBBY DEALER SAFETY CLIPS AVAILABLE FOR THE FOLLOWING PLUGS Airtronics Aristocraft 5 Slim Cirrus C Cos Futaba J Hitec JR Kyosho B UY PACK TO G UARD AGAINST IMPACT PdI-5on PmductH RO Box B2038 Baton Rouge LA 70684-2038 CL SpeedlLee Continued page 101 quite deep exhaust port beveled streamlined allow unrestricted flow gases rectangular exhaust opening sleeve round 0-ring-sealed minipipe Almost latest high-performance trucks know utilized such machin ing relief crankcase opposite intake opening relief increases clearance between rotating shaft case reducing viscous drag oil fuel Areas around intake opening just behind front bearing close-fitting course retain craakcase compression small radial hole crankshaft opposite slightly behind intake opening allows oil thrown out make sure area between ball bearings lubricated small hole crankcase allows some oil flow intake forward front bearing large hole drilled crankshaft offset side opposite intake port leave wall thicker around opening Most crank failures occur crack starts corner intake opening TOP has rounded corners area eliminate stress concentration beginning crankshaft holethe end conrod clearsis beveled side opposite crank pin so-called turbo crank bevel will supposedly throw incoming fuel-air charge out case acting like turbocharger wonder bow much effect really has chrome-plated brass sleeve unlike Ive ever seen before has 10 bypass ports large exhaust port exhaust port wide top encompassing about 900 bore circumference tapers bottom angle formed matches angle bypass case side exhaust port very narrow long port similar Perry directional port top edge Schnuerle ports two Schnuerle ports typical except top edge beveled upward slight angle Most other engines have ports top edge 90 Continued page 172 CENTURY JET MODELS INC 8 Martha Ct8305 Regency Woods Way Sumter SC 29150Louisville KY 40220 803 775-6491502 491-4114 RETRACT SELECTOR SPEED CONTROL VALVE Four Infinite Adjustment Screws 2 Up 2 Down Compatible air system Dim 3/B xls 1-1/4$2495 Wt 15 oz Semi & Deluxe Ducted Fan Jet Kits Epoxy fiberglass fuselage canopy foam wings plans/ instructions Intake/Exhaust System exc F-too F-100 Hun basic kit $18999 1/8 Scale 50 Removable Wings Length 63 Sport Hawk MK II basic kit $18988 Easy buildl vable wing Length 59 F-105 Thunderchief basic kit $23900 Length 73 1 Engine No Cheater Hole P-4 Phantom basic kit $59900 P&H NEW 1/7 Scale Twin Engine Aileron/Spoiler Config Length 00 vable 61 Wings LE/TE flaps Deluse kit DC wood I/B pylons CF kit plus morel Landing gear tires brakes available COMPARE OUR RETRACTS TO THEIRS Stainless Struts cut FREEl lete Air System Stainless Torque Linkol Installed Different strut configurations s Service * 1 Year Limited Warranty 30 Day Refund GIANT MAIN RETRACTS STANDARD OR 900 ROTATE 30-50 lb aircraft 2 sets 1 Standard 900 minutes 70 1100 retract angle Over-center lock down Nose gear available $27500 pair Wt 15 lbs 1/5 SCALE MAIN RETRACTS STANDARD OR 900 ROTATE Fits PICA Skys P-Si 1/5 Yellow A/C Ziroli Bud Noses plus Choice 91 Plyon Winners Handles 20-25 lb aircraft 8497 retract angle Positive lock up lock down Optional wire struts Nose gear available $19900 pair WI 22 oz NEW 1/5 SCALE P-Si & SPITFIRE poducts proudly MADE IN THE USA April 1993 169 SCALE DOCUMENTATION are/AntiqUe/CIassic Aircraft tsssu 01 pholon 1000 01 3-mews 927 S Reed Lak weed CO 80226 K rarauniqunann hind nalistacliun gusianteed uaiaiug $200 US iiudn AT LAST Z-BEST ENGINE CLEANER An Effective High Tech Engine Cleaner B/C Engines Removes Burnedon Fuel Residue 141W Encrusted Carhon Build-up Any Bare Metal Engine Outside oZBESTCIeaus Mufflers Tuned Pipes Headers I53dzoat Inside ~oo', akbieg wont Harm ur Discolor Metal Four Ounces wilt Clean 10-15 Engines Clean Engines Run Cooler Lust Longed $2005&HCAR25%taxDiseBy send check moneyAIRBORNE HOBBIES order ask local 3764 30th St San Diego CA 92104 dealerM/C800-3920505 VISA R/C BEGINNERS hobby loses about half Its potentIal f)ers because tao successfuly solo T SNT THEIR FAULT ITS THE PLANES FAULT lust some rnQst advert sed traners impossbe average begOnner soo wth seems norm crash run 4 5 planes before becomng successful Ths s both stupd costy menton real turnotf tor new student qute unnecessary YOU COULD SOLO YOUR FIRST TIME UP Thanks extensOve traner flOght testng ever conducted ths hobby can now know advanct whch ones fly slow handsoff stable easy enough Grandma whch lust so-so ntermedate whOch ones deserve traner abe Send $350 pus 52 postage EASE-OFFLYING RATINGS OF RIC TRAINERS Over 40 currenty ava)abe tran ers evauated noludOng ARFs Also grades ease of-buldng expans traner aerodynamOcs dares address questons poor trainersthan good traners marketed does no warn about Guarantee money back say thOs Os eye-openOng candid enlOght enOng tOme-savOng money-saving trustratOon sparOng R/C pubOOcation have ever read Send check sr money order Jim Waterman 3818 fleertield Dr San Antenin TX 78218 B&P Associates Gives Total Flight Line FREEDOM battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 FLoRIo FLYER Yankee Twister Specifications Wing Span 48 Wing Area 850 sq Engine Size 25 35 Design Wgt 3 375 lbs Minimum Channels Required 3 $9995 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field FUN-FLY FORCE! tunt Wagon Specifications Wing Span 50 Wing Area 788 sq nChannels~ ine Size 2510 40 flAsign Wgt 3104 lbs 4 $7995 Coal Hauler Speofications Wing Span 48 Wing Area 820 sq Engine Size 25 40 Design Wgt 275 35 lbs Minimum Channels Required 3 THE FLORIO FLYER CORP PO Box 88 Dagus Mines PA 15831 VISA/Mastercard accepted PH 814 885-8360 814 781-3480 Dealer/Distributor Inquiries InvIted- PA Residents add 6% Sales Tax Add $475 S&H per Kit Send $199 Complete Florlo FIVer ESERVING THE FUN-FLY TRADITIONTM FEATHER CUT creates new standard ease accuracy cutting white blue foam wing cores s off Precise single wire tracking concert micro-adjustable balance weights guided exclusive three-point tracking system guarantees ripple-free surfaces No trailing edge burn-out common two wire systems Couple FEATHER CUT Tekoas THERMAL GENERATOR fool proof temperature control youll Pro st time out Cuts straight taper wings fins stabilizers matically ts tape edge workbench dining table stores its own heavy duty mailing tube lete kit anodized plated components no hardware store trips u Instructions include cutting first wing making templates 28 Fold Bow 40 52 Available Power supply required Guaranteed out perform rest Simply best THE CENTER OF 31 d~ LA ad 172 Model Aviation peedlLee Continued page 169 sleeve centerline direct incoming charge straight across piston dont know method superior since 28000 rpm ports open less 0001 second anyway Two boost ports directly across exhaust port angled slightly towards center top edges beveled upward about 450 Another narrow port located side between boost port Schnuerle port four narrow ports about 040-in wide 400-in long Apparently let some fuel-air charge out beneath piston since bottom part slots open piston near top stroke Two small ports about 5A2-in wide directly under Schnuerle ports match two holes side piston near bottom stroke apparently vent underside piston increased cooling well allowing charge bypass Timing doesnt seem radical top edge exhaust port level center stays open l68 ends 1620 eight bypass ports open 128 crankshaft intake port opens about 350 ABDC after bottom dead center closes 580 ATDC after top dead center piston looks like typical highsilicon casting half-moon cutout front skirt clear crank BDC allows incoming charge get boost bypass top edge beveled fit taper sleeve reduce break-in time wrist pin held two circlips bore-to-stroke ratio closer square engines being built today bore being 648 stroke 645 doesnt seem bother high-revving capabilities however head fits about 150-in deep sleeve two-piece design like Rossi except clamp flange extends out full diameter head chamber relatively small 365-in diameter deep 136 wide squish band has slight taper avoid hydraulic lock piston TDC black anodized clamp ring held four metric-head bolts backplate has circular groove cut piston skirt doesnt hit BDC sealed case 0-ring reassemble engine make sure have groove top What modifications will make before next spring Well might open crank close nearer 700 ATDC might attempt fit piston little loosely might tricky its very easy make piston too loose Ive other instances modifications made instant junk new airplane might bigger improvement Maybe Ill try 28% silicon piston Next time Ill expound theory piston fits 10% nitro fuel avy CarrierlPerry Continued page 106 reliable source No injured fortunately spring end tube way cushion impact preserve structural integrity wing scheme described above works very well adds complexity sliding weight cant adjusted trim model slow flight wanted system easy adjust weight boxes lead shot installations Ive described previous columns also wanted system easy construct automatic operation Almost objectives achieved system isnt completely automatic weight must reset before flight required however hold wing vertical outboard tip up gently shake model about 10 seconds consider success system uses lead shot movable weight weight box wing tip basi cally same described previously Another weight box located center wing -in-diameter nylon screw weight boxes serves plug through lead shot added removed adjust weight thin-wall aluminum tube connects two weight boxes tube enters central box flush outboard side near front box high enough shot will below opening tube model its normal resting position outboard wall floor center box angled shot will roll toward tube under effects normal centripetal force encountered flight Operation simple shot starts out center box model released shot forced rear center box models forward acceleration model tracks straight ahead because tip weight center section wing tip As forward acceleration slows centripetal acceleration increases shot starts its migration toward opening tube gets falls through tube weight box wing tip time high-speed flight finished shot tip box performs its usual function during slow flight Number-nine shot 008-in diameter best choice because its small sizeit flows easier through fill hole through interual tube individual pellet also exerts less force hits bottom tip box Because shot traveling about 30 mph completes its trip should piece hardwood aluminum nylon etc tip box absorb energy shot damage use threaded nylon block holds access top champions purchase Precision Built models 1 Winning designs 1990 TOC 1st 2nd 3rd 5th 7 2 lightest airtrames availahie light wings Mod4ls Aeailgable EXTRA 260 STEPHENS AKRO ULTIMATE LASER 200 -A really can fly better better built airplane 4476 US HWY 281 N PRECISION BUILT INC spwvo BRANCH rx 78070512_438-3330 SNAP ROLL TEL YOU DIE LANDER RCs LASER CAT NO 87205 THE ORIGINATORS OF ALMOST-READY-TO-FLY AIRCRAFT MADE OF PLASTIC AND FOAM Fuselage Length 44 Rec Engine Size 45-60 60-120 4 Stroke Flying Weight 6-7 lbs Wing Span 60 Area 620 sq Radio Channels 4 Available favorite Hobby Deaier Replacement parts available Dealer distributor inquiries invited Write today free color catalog PO Box 458 Oakwood Georgia 30566 Made USA Snap Tight Hinge smooth free nylon piano wire hinge modeler can construct knuckle type hinge surface quiet operation scale like appearance Easy install 404-532-6401 control surfaces may removed tor finishing repair EIIIZIIID Allows tor considerable deflection L4 cONTROL SURFACE 12 hinges per package$395 per package Two Sizes Small No FOR 144 Large No FOR 145 Fourmost Products Check local hobby shop other great model products trom Fourmost April 1993 173 PAECISIOAI uILr name promise I
Edition: Model Aviation - 1993/04
Page Numbers: 101, 169, 172, 173
T HE INCENTIVE write column wanes time year rain cold weather mean end speed flying around Maybe Ill able visit some Texas California contests retire Sure like warm weather flying supposed Speed column Ill try new engine review change like 21 Sport Speed have several older Rossi engines plus couple other brands Rossi seems competitive time some mad money lying around decided call Bill McGraw get newer versions Several years ago Bill son excellent Speed competitors Bill now runs boats using Rossi engines imports sells Using Novarossi TOP engine has set several world records boats engine sounded interesting enough ordered despite much higher price certainly isnt cheap neither Nelson OS OPS other competitive engines Bill didnt have aero version parts convert car engine airplane type big difference IC ONTROL LINE crankshaft car version extended take flywheel clutch etc large rectangular cooling fins wouldnt fit cowl no big deal trim Bill also exchanged conrod lighter newer streamlined diamond-shaped cross section doubt makes much difference engines performance hasnt other engine have tried Ill try engine has same mounting dimensions Rossi dropped right Speed job dont use part intake restrictor venturi remote needle-valve assembly mounted pan behind engine fabricate spraybar put fuel intake just brass tube another tube soldered end 900 hole spray fuel forward hard part making prop driver SPEED ner-backplate piece fit locking collet crankshaft piston fit tightsqueaky tight ran few bladders fuel through engine before flying Dayton contest made impressive nasty noise running new APC 65 x 6 props first flight wasnt too great engine just too tight unload way should Bill McGraw said engines need lot running suddenly get proper fit go faster Ill work before next year TOP heavy eagine using onepiece crankcase lots reinforcing cooling fins two high-rpm-type ball bearings plastic retainers support crankshaft bypasses massive Continued page 169 April 1993 101 p Rediscovering fun camaraderie old days Frank Garzon seated eats wife Fran works tabulating 92 Cincinnati Ohio fliers Earl Price asymmetrical AMA Nationals Fran will Speed Event Director 93 Nationals 1kA job Ken Barthel 21 Sport Speed Without volunteers like would no Nationals Carlos Aloise test runs Formula 40 wife Connie runs FAI fliers Cold Cash Speed Bash included Bill Johanson starter Starter features sturdy legs stability large handle Billy Hughes Carl Dodge Ed Gifford Canadians Paul allow quick removal engine fires up Gibeault Ron Peter standing order U 5a NO MORE WORRY ABOUT CRITICAL RADIO PLUGS BECOMING DISCONNECTED WHEN YOU USE THIS NEW WELL DESIGNED SAFETY ITEM Pl 9 Safety Ass PROVIDES POSITIVE SECURELY LOCKED CONNECTION SNAP ACTION PROVIDES FOR QUICK AND EASY INSTALLATION AND REMOVAL OF THE SAFETY CLIP WHEN YOU UNPLUG THE CLIP CAN BE INSTALLED ON THE LARGER PORTION OF THE PLUG FOR SAFEKEEPING FOR USE ON PLANES HELICOPTERS CARS AND BOATS CONSTRUCTED OF NYLON FOR LIFETIME USE THREE SAFETY CLIPS SUPPLIED PER PACKAGE FOR USE ON BATTERY PACK AND AILERON PLUGS OR OTHER EXTENSIONS PACKAGE PRICE 9 SEE YOUR LOCAL HOBBY DEALER SAFETY CLIPS AVAILABLE FOR THE FOLLOWING PLUGS Airtronics Aristocraft 5 Slim Cirrus C Cos Futaba J Hitec JR Kyosho B UY PACK TO G UARD AGAINST IMPACT PdI-5on PmductH RO Box B2038 Baton Rouge LA 70684-2038 CL SpeedlLee Continued page 101 quite deep exhaust port beveled streamlined allow unrestricted flow gases rectangular exhaust opening sleeve round 0-ring-sealed minipipe Almost latest high-performance trucks know utilized such machin ing relief crankcase opposite intake opening relief increases clearance between rotating shaft case reducing viscous drag oil fuel Areas around intake opening just behind front bearing close-fitting course retain craakcase compression small radial hole crankshaft opposite slightly behind intake opening allows oil thrown out make sure area between ball bearings lubricated small hole crankcase allows some oil flow intake forward front bearing large hole drilled crankshaft offset side opposite intake port leave wall thicker around opening Most crank failures occur crack starts corner intake opening TOP has rounded corners area eliminate stress concentration beginning crankshaft holethe end conrod clearsis beveled side opposite crank pin so-called turbo crank bevel will supposedly throw incoming fuel-air charge out case acting like turbocharger wonder bow much effect really has chrome-plated brass sleeve unlike Ive ever seen before has 10 bypass ports large exhaust port exhaust port wide top encompassing about 900 bore circumference tapers bottom angle formed matches angle bypass case side exhaust port very narrow long port similar Perry directional port top edge Schnuerle ports two Schnuerle ports typical except top edge beveled upward slight angle Most other engines have ports top edge 90 Continued page 172 CENTURY JET MODELS INC 8 Martha Ct8305 Regency Woods Way Sumter SC 29150Louisville KY 40220 803 775-6491502 491-4114 RETRACT SELECTOR SPEED CONTROL VALVE Four Infinite Adjustment Screws 2 Up 2 Down Compatible air system Dim 3/B xls 1-1/4$2495 Wt 15 oz Semi & Deluxe Ducted Fan Jet Kits Epoxy fiberglass fuselage canopy foam wings plans/ instructions Intake/Exhaust System exc F-too F-100 Hun basic kit $18999 1/8 Scale 50 Removable Wings Length 63 Sport Hawk MK II basic kit $18988 Easy buildl vable wing Length 59 F-105 Thunderchief basic kit $23900 Length 73 1 Engine No Cheater Hole P-4 Phantom basic kit $59900 P&H NEW 1/7 Scale Twin Engine Aileron/Spoiler Config Length 00 vable 61 Wings LE/TE flaps Deluse kit DC wood I/B pylons CF kit plus morel Landing gear tires brakes available COMPARE OUR RETRACTS TO THEIRS Stainless Struts cut FREEl lete Air System Stainless Torque Linkol Installed Different strut configurations s Service * 1 Year Limited Warranty 30 Day Refund GIANT MAIN RETRACTS STANDARD OR 900 ROTATE 30-50 lb aircraft 2 sets 1 Standard 900 minutes 70 1100 retract angle Over-center lock down Nose gear available $27500 pair Wt 15 lbs 1/5 SCALE MAIN RETRACTS STANDARD OR 900 ROTATE Fits PICA Skys P-Si 1/5 Yellow A/C Ziroli Bud Noses plus Choice 91 Plyon Winners Handles 20-25 lb aircraft 8497 retract angle Positive lock up lock down Optional wire struts Nose gear available $19900 pair WI 22 oz NEW 1/5 SCALE P-Si & SPITFIRE poducts proudly MADE IN THE USA April 1993 169 SCALE DOCUMENTATION are/AntiqUe/CIassic Aircraft tsssu 01 pholon 1000 01 3-mews 927 S Reed Lak weed CO 80226 K rarauniqunann hind nalistacliun gusianteed uaiaiug $200 US iiudn AT LAST Z-BEST ENGINE CLEANER An Effective High Tech Engine Cleaner B/C Engines Removes Burnedon Fuel Residue 141W Encrusted Carhon Build-up Any Bare Metal Engine Outside oZBESTCIeaus Mufflers Tuned Pipes Headers I53dzoat Inside ~oo', akbieg wont Harm ur Discolor Metal Four Ounces wilt Clean 10-15 Engines Clean Engines Run Cooler Lust Longed $2005&HCAR25%taxDiseBy send check moneyAIRBORNE HOBBIES order ask local 3764 30th St San Diego CA 92104 dealerM/C800-3920505 VISA R/C BEGINNERS hobby loses about half Its potentIal f)ers because tao successfuly solo T SNT THEIR FAULT ITS THE PLANES FAULT lust some rnQst advert sed traners impossbe average begOnner soo wth seems norm crash run 4 5 planes before becomng successful Ths s both stupd costy menton real turnotf tor new student qute unnecessary YOU COULD SOLO YOUR FIRST TIME UP Thanks extensOve traner flOght testng ever conducted ths hobby can now know advanct whch ones fly slow handsoff stable easy enough Grandma whch lust so-so ntermedate whOch ones deserve traner abe Send $350 pus 52 postage EASE-OFFLYING RATINGS OF RIC TRAINERS Over 40 currenty ava)abe tran ers evauated noludOng ARFs Also grades ease of-buldng expans traner aerodynamOcs dares address questons poor trainersthan good traners marketed does no warn about Guarantee money back say thOs Os eye-openOng candid enlOght enOng tOme-savOng money-saving trustratOon sparOng R/C pubOOcation have ever read Send check sr money order Jim Waterman 3818 fleertield Dr San Antenin TX 78218 B&P Associates Gives Total Flight Line FREEDOM battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 FLoRIo FLYER Yankee Twister Specifications Wing Span 48 Wing Area 850 sq Engine Size 25 35 Design Wgt 3 375 lbs Minimum Channels Required 3 $9995 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field FUN-FLY FORCE! tunt Wagon Specifications Wing Span 50 Wing Area 788 sq nChannels~ ine Size 2510 40 flAsign Wgt 3104 lbs 4 $7995 Coal Hauler Speofications Wing Span 48 Wing Area 820 sq Engine Size 25 40 Design Wgt 275 35 lbs Minimum Channels Required 3 THE FLORIO FLYER CORP PO Box 88 Dagus Mines PA 15831 VISA/Mastercard accepted PH 814 885-8360 814 781-3480 Dealer/Distributor Inquiries InvIted- PA Residents add 6% Sales Tax Add $475 S&H per Kit Send $199 Complete Florlo FIVer ESERVING THE FUN-FLY TRADITIONTM FEATHER CUT creates new standard ease accuracy cutting white blue foam wing cores s off Precise single wire tracking concert micro-adjustable balance weights guided exclusive three-point tracking system guarantees ripple-free surfaces No trailing edge burn-out common two wire systems Couple FEATHER CUT Tekoas THERMAL GENERATOR fool proof temperature control youll Pro st time out Cuts straight taper wings fins stabilizers matically ts tape edge workbench dining table stores its own heavy duty mailing tube lete kit anodized plated components no hardware store trips u Instructions include cutting first wing making templates 28 Fold Bow 40 52 Available Power supply required Guaranteed out perform rest Simply best THE CENTER OF 31 d~ LA ad 172 Model Aviation peedlLee Continued page 169 sleeve centerline direct incoming charge straight across piston dont know method superior since 28000 rpm ports open less 0001 second anyway Two boost ports directly across exhaust port angled slightly towards center top edges beveled upward about 450 Another narrow port located side between boost port Schnuerle port four narrow ports about 040-in wide 400-in long Apparently let some fuel-air charge out beneath piston since bottom part slots open piston near top stroke Two small ports about 5A2-in wide directly under Schnuerle ports match two holes side piston near bottom stroke apparently vent underside piston increased cooling well allowing charge bypass Timing doesnt seem radical top edge exhaust port level center stays open l68 ends 1620 eight bypass ports open 128 crankshaft intake port opens about 350 ABDC after bottom dead center closes 580 ATDC after top dead center piston looks like typical highsilicon casting half-moon cutout front skirt clear crank BDC allows incoming charge get boost bypass top edge beveled fit taper sleeve reduce break-in time wrist pin held two circlips bore-to-stroke ratio closer square engines being built today bore being 648 stroke 645 doesnt seem bother high-revving capabilities however head fits about 150-in deep sleeve two-piece design like Rossi except clamp flange extends out full diameter head chamber relatively small 365-in diameter deep 136 wide squish band has slight taper avoid hydraulic lock piston TDC black anodized clamp ring held four metric-head bolts backplate has circular groove cut piston skirt doesnt hit BDC sealed case 0-ring reassemble engine make sure have groove top What modifications will make before next spring Well might open crank close nearer 700 ATDC might attempt fit piston little loosely might tricky its very easy make piston too loose Ive other instances modifications made instant junk new airplane might bigger improvement Maybe Ill try 28% silicon piston Next time Ill expound theory piston fits 10% nitro fuel avy CarrierlPerry Continued page 106 reliable source No injured fortunately spring end tube way cushion impact preserve structural integrity wing scheme described above works very well adds complexity sliding weight cant adjusted trim model slow flight wanted system easy adjust weight boxes lead shot installations Ive described previous columns also wanted system easy construct automatic operation Almost objectives achieved system isnt completely automatic weight must reset before flight required however hold wing vertical outboard tip up gently shake model about 10 seconds consider success system uses lead shot movable weight weight box wing tip basi cally same described previously Another weight box located center wing -in-diameter nylon screw weight boxes serves plug through lead shot added removed adjust weight thin-wall aluminum tube connects two weight boxes tube enters central box flush outboard side near front box high enough shot will below opening tube model its normal resting position outboard wall floor center box angled shot will roll toward tube under effects normal centripetal force encountered flight Operation simple shot starts out center box model released shot forced rear center box models forward acceleration model tracks straight ahead because tip weight center section wing tip As forward acceleration slows centripetal acceleration increases shot starts its migration toward opening tube gets falls through tube weight box wing tip time high-speed flight finished shot tip box performs its usual function during slow flight Number-nine shot 008-in diameter best choice because its small sizeit flows easier through fill hole through interual tube individual pellet also exerts less force hits bottom tip box Because shot traveling about 30 mph completes its trip should piece hardwood aluminum nylon etc tip box absorb energy shot damage use threaded nylon block holds access top champions purchase Precision Built models 1 Winning designs 1990 TOC 1st 2nd 3rd 5th 7 2 lightest airtrames availahie light wings Mod4ls Aeailgable EXTRA 260 STEPHENS AKRO ULTIMATE LASER 200 -A really can fly better better built airplane 4476 US HWY 281 N PRECISION BUILT INC spwvo BRANCH rx 78070512_438-3330 SNAP ROLL TEL YOU DIE LANDER RCs LASER CAT NO 87205 THE ORIGINATORS OF ALMOST-READY-TO-FLY AIRCRAFT MADE OF PLASTIC AND FOAM Fuselage Length 44 Rec Engine Size 45-60 60-120 4 Stroke Flying Weight 6-7 lbs Wing Span 60 Area 620 sq Radio Channels 4 Available favorite Hobby Deaier Replacement parts available Dealer distributor inquiries invited Write today free color catalog PO Box 458 Oakwood Georgia 30566 Made USA Snap Tight Hinge smooth free nylon piano wire hinge modeler can construct knuckle type hinge surface quiet operation scale like appearance Easy install 404-532-6401 control surfaces may removed tor finishing repair EIIIZIIID Allows tor considerable deflection L4 cONTROL SURFACE 12 hinges per package$395 per package Two Sizes Small No FOR 144 Large No FOR 145 Fourmost Products Check local hobby shop other great model products trom Fourmost April 1993 173 PAECISIOAI uILr name promise I