C SPEED Gene Hempel THERE has quite bit interest B speed have asked Dave Layman would supply necessary information write column about setting up X-29 tank suction will done two parts due amount information covered Engine Set-Up First disassemble X-29 except bearings heat case oven approximately 3500F easy removal bearings case may have rap case piece wood bearings will fall out Allow bearings cool clean thoroughly lacquer thinner dry have ultrasonic cleaner would better may find beneficial wear some type heavy gloves fingers burned After case has cooled slightly insert shaft place give fast spin shaft should spin freely come stop heavy part counterbalance bottom case misalignment bearings try reheating case crankshaft inserted bearings Allow case cool slightly Place old prop shaft tighten prop nut Now spin crankshaft should align bearings crankshaft should no binds will rob engine up 1000-1500 rpm crankshaft assembly complete oil Marvel Mystery Oil 3-In-i Oil wrap up set aside next step remove rotor back plate Carefully examine back plate metal flashing around edges Use X-Acto knife #11 blade carefully remove flash ing face edges Obtain piece tempered glass about 12-14 inches square local glass shop will used lapping plate Place piece #600 grit wet dry sandpaper glass Pour small amount 3-In-l Oil sandpaper Sand circular direction face back plate until running surface smooth will have gray appearance after sanding Clean back plate rotor rotor pin liquid soap water Dip parts lacquer thinner let dry thoroughly Reassemble back plate rotor placing two strips 006 feeler-gauge material between rotor back plate Press rotor pin against rotor until have snug fit Now tighten rotor pin set screw Place several drops Marvel Mystery Oil 3-In-i Oil rotor check binds feels OK wrap up set aside Now important partthe sleeve piston rework will need access lathe Machine 014 inches bottom side sleeve flange will allow sleeve drop deeper case doing because sleeve timing 5 too high Stock timing X-29 1780 exhaust 1380 intake Thetiming should set 1730 exhaust 1330 intake experi ence combination performs very well achieve good engine performance good piston sleeve fit very important Carefully remove wrist pin rod piston Set parts aside uistil later Carefully clean sleeve piston liquid soap water have found tooth brush works very well cleaning operation Dip parts lacquer thinner displace moisture Dry parts thoroughly blow off lint loose particles lint can cause false fitting keep parts clean Turn sleeve bottom side up Drop piston sleeve let fall its own weight piston should stop approximately 250 inches top sleeve Using -inch wood dowel push piston very lightly through sleeve fit will give very good piston seal Should piston fall through sleeve forget engine will never run well suggest have sleeve rechromed find another piston will fit sleeve too tight will need lap piston sleeve mixture Comet 3-h-i Oil excellent lapping compound extremely careful operation best clean parts thoroughly checking piston fit frequently guess need sleeve rechromed honed send SASE Gene Hempel 301 N Yale Drive Garland TX 75042 quotes chrome honing service Reassemble wrist pin rod piston Oil parts thoroughly set aside Now have sleeve piston fit will need make new button head First machine off head chamber stock head Bore out way through center head approximately 550 LD glow plug plug wrench clearance will used retainer button head button head machined piece 1-inch aluminum bar Continued page 123 K 525 210-. 7I 238 Ii BUTTON HEAD %-32-2B2024 TB ALUM TAPPED HOLE 115 146AINCH BOREBALL MILL 003 MAX HEAD TO PISTON CLEARANCE AT TOC Details new button head reworked Supertigre X-29 MACHINE 014 FROM BOTTOM OF FLANGE X-29 STOCK CYLINDER SIDE VIEW Rework stock cylinder liner change port timing See story 50 Model Aviation SupertigreX-29 head rework Bottomviewof modified heed left thenew button head right Supertigre A- mountea speea pan Note suction feed tank Bucker Bu-133 Jungmeister new Bucker Jungmeister 1/5 scale de signed give maximum aerobatic performance 60 engine kit documentation will illus trate 3 4 different versions famed German biplane appropriate 3-viewsThe model also convertible Jungmann version Its very versatile airplanel Construction all-wood wing structure comparable famed Wacos sequential photo-illustrated instruction manual makes putting together snap bipe youll enjoy building much flyingl FEATURES Mylar decals 60 span Complete hardware pkg 1030 sq area Builds 3 versions 49 length Modifiable Jungmann Weight 8-9 lbs Illustrated instruc 60 engine vacu-formed cowl rice $9995 2657 NE 188th Street Miami Florida 33180 Telephone 305 935-1436 previous turnouts fliers general abilities instance contest has drawn approximately 15 fliers past Beginners Intermediates Advanced contest could advertised having PA NIPA categoriea Beginner Intermediate combined Advanced Expert keeps number trophy sets three same required traditional AMA three divisions practice fliers voluntarily placing themselves cate gories seems have worked quite well over past couple years Only very few instances sandbagging have come light cases through ignorance scoring abilities rather anything else areas PAMPA categories have tried usually takes just few voices stunt fliers get contest director go ahead P NI P classes Once instituted use P AM P cate gories seems help drawing out stunt fliers some instances AMA Novice pattern has used P NI P begin ner category help get new fliers stunt flying handout sheet complete instruc tions holding P AM P category stunt contest available Keep clean English stunt newslet ter Claptrap comes suggestion Robert King periodically clean both muffler pressure fitting remove residue numerous flights experiencing lean runs some engine stopping mid-flight After changing engines tanks filter fuel lines thing left muffler pressure fitting surmised partial blocking pressure fitting residue causing lean runs info rmation Ofl Stunt orP 4 MP 4 write Wynn Pau 1640 Maywick Drive Lexington KY 40504 CL Carrier/Perry Continued page 49 wing outboard flap/aileron Leadouts moveable rudder fixed thin low-aspect-ratio wing reduces frontal area increases Reynolds Number end result reduced profile drag high speed Induced drag high speed very small because relatively light wing loadings Profile class models low speed induced drag increases compared model higher aspect ratio wing produces gentle stall because low-aspectratio planform has affect lift does airfoil section high angles attack Thus thin airfoil no penalty low speed outboard wing has flap/aileron mounted inboard two thirds span deflects up low speed providing rolling moment Out circle addition flap causes pitchup moment Mariah transitions full stall very easily quite stable 45-degree nosehigh attitude Tonys engine converted K&B 58 Speed control Supertigre carburetor rotary exhaust restrictor fuel tank uniflow type prop Rev-Up 8-8 Tony has scoring 240s combination scale bonus points Richard L Perry 416 Woodhill Dr Golds boro NC 27530 CL Speed/Hempel Continued page 50 stock preferably 2024 T6 should available hardware store metal shop Drill way through glow plug hole using #3 drill tap hole using ap Check local hardware store tap chamber use ball-end mill run up until touches tapped hole Bore out additional 115 depth develop problems check drawings clarification Ma chine button head per drawing external dimensions Now necessary machine work fin ished can start reassembling engine height clearance between button head piston Top Dead Center should no 003 may have use brass shims achieve dimension Also very careful pull binds engine tightening bolts part causes engine bind remove part check what causing problem next installmentJune issue will cover modification venturi run tank set up plus what type fuel works best suction system pipe set up Gene Hempe 301 N Yale Dr Garlana TX 75042 Fairey/Berliner Continued page 53 crew decided play safe landed Karachi India 100 gallons gas left world record flight 4130 miles first non-stop Britain India lot learned flight least important being need make crew comfortable simple lack arm rests forced pilots trade off two hours instead planned five hours FIt Lt N H Jenkins Sqdr Ldr G JonesWilliams proved basic concept Fairey LRM good Less five months after its first flight made sec ond longest aviation history Dec 16 1929 second try record begun time distance beaten 4975 set September Costes Bellonte flying Breguet XIX Ques tion Mark Paris Manchuria About 12 hours after takeoff South Africa Fairey LRM NIk 1 slammed side mountain south Tunis near Mediter ranean coast North Africa Both pilots killed airplane demolished accident investigation pointed toward weather pilot error likely con tributing factors airplane being given clean bill health July 1930 Air Ministry decided build second Long Range Monoplane changes planned addition landing gear fairings complete instrumentation two-axis gyroscopic auto-pilot being developed Royal Aeronautical Establishment new machine Mk2 K1991 flown June 30 1931 RAF tests completed early autumn proving flight made Sqdr Ldr 0 R Gayford FIt Lt D L G Bett took off Cranwell Oct 27 arrived late next day Egypt after flight 2857 miles airplane worked quite satisfactorily trip out leisurely trip back until ar rived home dense fog forced landing field England did enough damage put LRM Mk2 repair shop several months Finally ready go record April 1980 123
Edition: Model Aviation - 1980/04
Page Numbers: 50, 123
C SPEED Gene Hempel THERE has quite bit interest B speed have asked Dave Layman would supply necessary information write column about setting up X-29 tank suction will done two parts due amount information covered Engine Set-Up First disassemble X-29 except bearings heat case oven approximately 3500F easy removal bearings case may have rap case piece wood bearings will fall out Allow bearings cool clean thoroughly lacquer thinner dry have ultrasonic cleaner would better may find beneficial wear some type heavy gloves fingers burned After case has cooled slightly insert shaft place give fast spin shaft should spin freely come stop heavy part counterbalance bottom case misalignment bearings try reheating case crankshaft inserted bearings Allow case cool slightly Place old prop shaft tighten prop nut Now spin crankshaft should align bearings crankshaft should no binds will rob engine up 1000-1500 rpm crankshaft assembly complete oil Marvel Mystery Oil 3-In-i Oil wrap up set aside next step remove rotor back plate Carefully examine back plate metal flashing around edges Use X-Acto knife #11 blade carefully remove flash ing face edges Obtain piece tempered glass about 12-14 inches square local glass shop will used lapping plate Place piece #600 grit wet dry sandpaper glass Pour small amount 3-In-l Oil sandpaper Sand circular direction face back plate until running surface smooth will have gray appearance after sanding Clean back plate rotor rotor pin liquid soap water Dip parts lacquer thinner let dry thoroughly Reassemble back plate rotor placing two strips 006 feeler-gauge material between rotor back plate Press rotor pin against rotor until have snug fit Now tighten rotor pin set screw Place several drops Marvel Mystery Oil 3-In-i Oil rotor check binds feels OK wrap up set aside Now important partthe sleeve piston rework will need access lathe Machine 014 inches bottom side sleeve flange will allow sleeve drop deeper case doing because sleeve timing 5 too high Stock timing X-29 1780 exhaust 1380 intake Thetiming should set 1730 exhaust 1330 intake experi ence combination performs very well achieve good engine performance good piston sleeve fit very important Carefully remove wrist pin rod piston Set parts aside uistil later Carefully clean sleeve piston liquid soap water have found tooth brush works very well cleaning operation Dip parts lacquer thinner displace moisture Dry parts thoroughly blow off lint loose particles lint can cause false fitting keep parts clean Turn sleeve bottom side up Drop piston sleeve let fall its own weight piston should stop approximately 250 inches top sleeve Using -inch wood dowel push piston very lightly through sleeve fit will give very good piston seal Should piston fall through sleeve forget engine will never run well suggest have sleeve rechromed find another piston will fit sleeve too tight will need lap piston sleeve mixture Comet 3-h-i Oil excellent lapping compound extremely careful operation best clean parts thoroughly checking piston fit frequently guess need sleeve rechromed honed send SASE Gene Hempel 301 N Yale Drive Garland TX 75042 quotes chrome honing service Reassemble wrist pin rod piston Oil parts thoroughly set aside Now have sleeve piston fit will need make new button head First machine off head chamber stock head Bore out way through center head approximately 550 LD glow plug plug wrench clearance will used retainer button head button head machined piece 1-inch aluminum bar Continued page 123 K 525 210-. 7I 238 Ii BUTTON HEAD %-32-2B2024 TB ALUM TAPPED HOLE 115 146AINCH BOREBALL MILL 003 MAX HEAD TO PISTON CLEARANCE AT TOC Details new button head reworked Supertigre X-29 MACHINE 014 FROM BOTTOM OF FLANGE X-29 STOCK CYLINDER SIDE VIEW Rework stock cylinder liner change port timing See story 50 Model Aviation SupertigreX-29 head rework Bottomviewof modified heed left thenew button head right Supertigre A- mountea speea pan Note suction feed tank Bucker Bu-133 Jungmeister new Bucker Jungmeister 1/5 scale de signed give maximum aerobatic performance 60 engine kit documentation will illus trate 3 4 different versions famed German biplane appropriate 3-viewsThe model also convertible Jungmann version Its very versatile airplanel Construction all-wood wing structure comparable famed Wacos sequential photo-illustrated instruction manual makes putting together snap bipe youll enjoy building much flyingl FEATURES Mylar decals 60 span Complete hardware pkg 1030 sq area Builds 3 versions 49 length Modifiable Jungmann Weight 8-9 lbs Illustrated instruc 60 engine vacu-formed cowl rice $9995 2657 NE 188th Street Miami Florida 33180 Telephone 305 935-1436 previous turnouts fliers general abilities instance contest has drawn approximately 15 fliers past Beginners Intermediates Advanced contest could advertised having PA NIPA categoriea Beginner Intermediate combined Advanced Expert keeps number trophy sets three same required traditional AMA three divisions practice fliers voluntarily placing themselves cate gories seems have worked quite well over past couple years Only very few instances sandbagging have come light cases through ignorance scoring abilities rather anything else areas PAMPA categories have tried usually takes just few voices stunt fliers get contest director go ahead P NI P classes Once instituted use P AM P cate gories seems help drawing out stunt fliers some instances AMA Novice pattern has used P NI P begin ner category help get new fliers stunt flying handout sheet complete instruc tions holding P AM P category stunt contest available Keep clean English stunt newslet ter Claptrap comes suggestion Robert King periodically clean both muffler pressure fitting remove residue numerous flights experiencing lean runs some engine stopping mid-flight After changing engines tanks filter fuel lines thing left muffler pressure fitting surmised partial blocking pressure fitting residue causing lean runs info rmation Ofl Stunt orP 4 MP 4 write Wynn Pau 1640 Maywick Drive Lexington KY 40504 CL Carrier/Perry Continued page 49 wing outboard flap/aileron Leadouts moveable rudder fixed thin low-aspect-ratio wing reduces frontal area increases Reynolds Number end result reduced profile drag high speed Induced drag high speed very small because relatively light wing loadings Profile class models low speed induced drag increases compared model higher aspect ratio wing produces gentle stall because low-aspectratio planform has affect lift does airfoil section high angles attack Thus thin airfoil no penalty low speed outboard wing has flap/aileron mounted inboard two thirds span deflects up low speed providing rolling moment Out circle addition flap causes pitchup moment Mariah transitions full stall very easily quite stable 45-degree nosehigh attitude Tonys engine converted K&B 58 Speed control Supertigre carburetor rotary exhaust restrictor fuel tank uniflow type prop Rev-Up 8-8 Tony has scoring 240s combination scale bonus points Richard L Perry 416 Woodhill Dr Golds boro NC 27530 CL Speed/Hempel Continued page 50 stock preferably 2024 T6 should available hardware store metal shop Drill way through glow plug hole using #3 drill tap hole using ap Check local hardware store tap chamber use ball-end mill run up until touches tapped hole Bore out additional 115 depth develop problems check drawings clarification Ma chine button head per drawing external dimensions Now necessary machine work fin ished can start reassembling engine height clearance between button head piston Top Dead Center should no 003 may have use brass shims achieve dimension Also very careful pull binds engine tightening bolts part causes engine bind remove part check what causing problem next installmentJune issue will cover modification venturi run tank set up plus what type fuel works best suction system pipe set up Gene Hempe 301 N Yale Dr Garlana TX 75042 Fairey/Berliner Continued page 53 crew decided play safe landed Karachi India 100 gallons gas left world record flight 4130 miles first non-stop Britain India lot learned flight least important being need make crew comfortable simple lack arm rests forced pilots trade off two hours instead planned five hours FIt Lt N H Jenkins Sqdr Ldr G JonesWilliams proved basic concept Fairey LRM good Less five months after its first flight made sec ond longest aviation history Dec 16 1929 second try record begun time distance beaten 4975 set September Costes Bellonte flying Breguet XIX Ques tion Mark Paris Manchuria About 12 hours after takeoff South Africa Fairey LRM NIk 1 slammed side mountain south Tunis near Mediter ranean coast North Africa Both pilots killed airplane demolished accident investigation pointed toward weather pilot error likely con tributing factors airplane being given clean bill health July 1930 Air Ministry decided build second Long Range Monoplane changes planned addition landing gear fairings complete instrumentation two-axis gyroscopic auto-pilot being developed Royal Aeronautical Establishment new machine Mk2 K1991 flown June 30 1931 RAF tests completed early autumn proving flight made Sqdr Ldr 0 R Gayford FIt Lt D L G Bett took off Cranwell Oct 27 arrived late next day Egypt after flight 2857 miles airplane worked quite satisfactorily trip out leisurely trip back until ar rived home dense fog forced landing field England did enough damage put LRM Mk2 repair shop several months Finally ready go record April 1980 123