Control Line RA CING John Ballard USE 10% NITRO must say response Racing enthusiasts over country subject limiting nitro content fuel has overwhelming received over 50 written responses Racers al state addition received nu merous long-distance phone calls ad ditional input seems areas country 10%-nitro rule has tried great success must admit contest St Louis Racing events will Midwest area has tried how- run 10% nitro furnished conever notice May Control Line Continued page 160 July 1983 65 Bob Kerr set WAM record 50001 recent meet San Jose CA Note circles laid out over speed bumps parking lot site Photo Vic Garner 5-oz-capacity Rat tank available either complete kit form See column details right Harters Proto speed pan altered fit OS 40applecheeks welded exterior machined Out fit crankcase 5-oz Rat tank installed THE MEN TRAINER Discover what thousands MEN TRAINER pilots have learnedthere easy way learn fly RJC Fly trainer specifically designed absolute beginner A/C Years design engineering flight testing updating have given plane its unique flight characteristics Make introduction A/C flying enjoyable experience MEN TRAINERs ultra stability slow flight characteristics will allow hands-off recovery control errors large size gives maximum visibility easy altitude recognition during learning process FEATURES Under-cambered wing ample dihedral slow 5 30 MPH stable flight3 lb flying weight average radio installedLarge roomy fuselage ease radio installation dy plywood-spruce-balsa construction withstand beginners abuse learning landEasy follow plans instructionpre-formed landing gear braceTHRU-CUT die cutting combined TRI SQUARE-LOC construction fast easy assembly Complete hardware packageMonokote cutting guide Building time 12 25 hours THE TWIN TRAINER youve always wanted fly twin have put off cost problems hazards MEN has airplane youve wating MEN TWIN TRAINER Weve taken ultra stable MEN TRAINER has introduced thousands modelers pleasures A/C modeling converted simple twin design can flown trimotori new MEN TWIN TRAINER available two ways complete kit already own MEN TRAINERS ass simple building wing kit nose conversion requires no further modification airplane Just switch wings youre off Model Engineering Norwalks THRU CUT die cutting combined TRI-SOUARE-LOC construc tion plywood balsa spruce make construction fast simple MEN TWIN TRAINER can flown two 09 15 engines three channel radio easy-flying twinengine fun MEN TWIN TRAINER cant beat THE MEN TRAINER Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 1904 476-8639 ENGINE SLEEVE & BEARING PULLER VPull Ihose tight sleeves bearings easily damage Cone grips sleeve bearing 10 cone espanding brass ring new 60s 17MM rear bearing Sleeve Puller $795* SPECIAL * Bearing Puller $695Both tar $1395 New New TUBE & SOCKETS I in dia aluminum alloy tubing plug-in wings Included pair special WING slip- fit phenolic sockets build Ihe wing-structure 2024 alum tube 24 long socket 12 long Iaet TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics its predecessors Especially recommended sportsman advanced pattern also good choice turn around pattern Plans construction hints $995 cowlings four times After get ting cowling shape want next step liberally apply several brushed-on coats Aero Gloss clear dope have found rebuilt fuel-soaked cowlings way get paint adhere repaired places have found necessary using epoxy-type paints repaint cowling After application Aero Gloss clear can switch other types dope epoxy-type paints can probably achieve complete re paintingof Stunt plane about two weeks working time get work day knows may come up ounce two lighter after repaint has done usual over haul least have plane fresh ened up maybe few cosmetic changes might fool flying friends itformation Stunt PAMPA contact Wvnt Paul 1640 Mavwick Dr Lexington KY 40504 CL Racing/Ballard Continued page 65 test management Furthermore find May 31 annual contest held Chi cago Treetown Club Racing events will use 10% nitro supplied site Racing community whole sup ports use 10% nitro Racing events ran equipment 10% nitro found does reduce air speed am sure whether aircraft has slowed down enough allow aver age intermediate-level modeler ability compete realistically pro fessionals flying same event Considerable rhetoric revolves around classification system Beginner Inter mediate Professionalor just possibly two categories Intermediate Professional know subject has hashed rehashed times Racing-participant meetings Nationals well newsletters has subject discussion various club meetings Im thinking about compiling input probably best procedure would itemize suggestions outline form print future column ask comments Racing competitors themselves As group can initiate meaningful rule changes will benefit majority Racing participants Cobra Rat Racer have several re quests measurements Dick Lamberts recently-designed Cobra racer unveiled 1982 Lincoln Nats Dick has made drawing giving basic measure ments Ive included months column can tell Cobra flew well Nats windy conditions 160 Model Aviation GP THE TWIN TRAINER S Your Dealer Order DIrect Include 75 Per Item UPS OIL BEGINNERS AND NOVICE FLYERS.Are hav ing trouble getting hang controlled RIO flying squirrely trainer Wait till experi ence smooth solid slow flight characteristics GOLDEN FALCON thin will say Now thats like EXPERIENCED FLYERS.ls fast-paced hotdogging trend R/O getting down would like spend really enjoyable relax ing afternoon flying field graceful yet aerobatic capabilities GOLDEN FALCON allow just thatENJOYI COMPLETE KIT.Except radio engine kit contains everything needed build flying model Wheels fuel tank Super Monokotecovering three types glue hardware connectors cowls etc.. nothing left out Compare other kits provide skeleton structure INSTRUCTIONS.The 48 page fully-illustrated stepby-step instruction manual takes guesswork out building radio installation PRE-FORMED PARTS.Wing saddle/windshield vacuum formed ribs formers pre cision die-cut several special parts injection molded added convenience JIG CONSTRUCTION.Six special jigs simplify assem bly holding parts alignment gluing ENGINE MOUNTUnique mounting system allows engine tank removed seconds inspec tion replacement PURE PLEASUREBuilding flying new GOLDEN FALCON sure provide enjoyable satisfying experience FOR MORE FREE INFORMATION WRITE OR CALL TODAY. ST CROIX OF PARK FALLS LTD PO BOX 279 PARK FALLS WI 54552 PHONE 715 762-3226 Dealer Inquiries Invited stopped required half-lap Dick also producing some glass tops will accommodate new OS40 big-block en gine has built-in exit hole minipipe tops building tips required can received Mr Dick Lambert 320 South Ridgewood Port Orange FL 32019 New 5-oz Rat Tank Available As Rat Racing enthusiasts aware problem getting enough fuel new highconsumption racing engines has prob lem past have used typical cylindrical tank homemade version same few years ago Dons Custom Tanks brought out five-oz Rat tank actual volume-measurement approximately 424 oz com petitors took old four-ounce cylindrical Rat Race tank chopped off rear added portion another tank receive full 4 5/4 oz volume required achieve consistent engine run 40-50 laps understand due much prodding Larry Dziak Dons has designed new tank now stock shipment tank has full five-oz volume avail able two modes first mode contains completed tank tubes mounted fill tube rear pressure tube running top stopping about -in rear tank typical Racing setup years second tank mode includes no tubes position merely fill-tube soldered place receive two pieces brass tubing rear end cap left off Racer may install tubes way sees fit certainly makes working tank much easier before tubes removed holes plugged resoldered addition new special freeze-out plug rear tankcap used give rear tank strength addition cap portion heav ier gauge metal reducing vibration point rear attachment pan Reworking Harters Rat pan accept OS 40 1 have several phone calls numerous letters concerning proper way rework Harters proto pan fit new OS Big Block 40 basi cally two methods first method entails very careful grinding pan meet block-width requirements engine elongating engine mounting-lug holes very close block engine can bolted down satisfactorily other method involves welding ap plecheeks pan requires new pan used since fuel-soaked ver sions weld satisfactorily welding extra meat original engine mountinglug bolt holes can used course large amount grinding still required clear engine block large shaft housing however additional meat welded exterior pan smoothed out form applecheek effect have enclosed picture pans doesnt hurt July 1983 161 LOOK AT THESE FEATURES AM4 Order 12 get Club e City State Imprinted AW FREE Quality Sportswear AMA Emblems ADJUSTABLE ONE- SIZE FITS ALL Sport caps in White Royal Blue full color AMA emblem EACH Add $100 per cap br poslage handling SPECIFY Summer Mesh El Winter PolyfoamEl Mail check order Printed Products Co Inc 20 Box 545 Harrisonville MO 64701 1-800-821-7822 MO call collect 1-816-884-3003 VISA and MasterCard Welcome call ior quaniliy discounis performance certainly strengthens frontal area pan considerably California Racing under adverse condi tions just received photograph Cal ifornia showing Bob Kerr just turned new WAM record time 50001 using muffler-equipped Rat Racer Mufflers required WAM rules picture can sec muffler protruding out area mini-pipe usually exits addi tion can see racing circles over lap speed bump parking lot guess can say racing under ad verse conditions' comments suggestions al ways appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 CL Speed/Hempel Continued page 66 rately however propellers required particular assumed brake horsepower rpm speed thrust horsepower required standard sea level atmospheric conditions study summaries points out tiny changes diameter pitch affect power requirement speed course propellers must have true helical pitch least 30%-radius point blade tips pitch/diameter ratio should di minish towards hub two-blade pro pellers suffer high tip-speed efficiency-loss requires greater en gine power Ditto one-blader although studied specifically Three bladed props appear provide power required minimum brake horsepower arid tip-speed efficiency-loss Three-blade smoothness circular flight may also plus So study FAI CL Speed airplane warts hope might reveal something useful different per spective o new idea stranger competition class Id happy receive Proxy/Hannan Continued page 69 can also soak up hours almost alarming fashion Allow adequate time shipping too air mail delays can occur models have known miss contests little day account Additional hang ups have encountered via postal strikes over-zealous customs officers hap pily such incidents have infrequent Careful packing must models transported safely unrealistic ex pect Fragile Side Up notices much protecting delicate models Rather should strive bullet-proof con tainer withstand anticipated stresses Small suitcases metal boxes wooden boxes reinforced cardboard cartons have successfully employed Some builders prefer box-within-a-box con cept may help isolate contents outside pressure shocks Continued page 165 comments critique findings best regards Jerry Rautio 18 Highland Ct Fitchburg MA 01420 Well fellow Speed fliers what think can write Jerry directly course Id like know what com ments too Remember Jerrys work based directly proven full-scale propeller-design science very difficult know what correction factors must applied model prac tices use very high rpms propblade airfoils almost microscopic com pared full-scale ones brings kinds air-property effects scaleinduced effects picture Yet various coefficients efficiency correc tion factors still exist us though may different imagined Jerrys investigation Its place start Gene Hempel 301 N Yale Dr. Garland TX 75042 Table 2 ENGINE/PROPELLER SuMMARIEs FOR CLEAN AIRPLANE THP 165 nel No BIadm 3 2 liochosi PlO BI-IP RPM MPH 6169c5667 918 19 39000 165 6895 58658902135000165 THP0 ToTCp 5971135257944980916 9401134257 745770390 FOR CLEAR AIRPLANE THP 170 mph 362 70 5834930 21 35000170 27045 6008852 237 35000170 8991238273047260913 5211236272649670286 FOR AvERAGE AIRPLANE THPr 165 mph 36301 5699904 21 39000165 27081 5801818 239 35000165 9861230279548150928 5151230279550690395 Propulsive efficiency maw elm airspeed THP0 Thesat HP available maw elm aiesoeod Ta Thrast lb available may dee airapead Ta ic thraso Est V 0 C0 Power CanffieientBHP 590 P an3 CT fivieet tftraat P 00239 tao-leeel nRPM/6Q 0Ojam. Pt KTipSpeecl Carrection Poelor 164 Model Aviation HOt*iy H am Wieg Span -789 9mg Area 550 Sq SENSOAR glider HOBBY HORN Eaclasivel HOBBY HORN Kit SENSOAR Glider kit high qaality kit Machine catsanded parts Select quality balsa spruce Detailed plans written restructrons Far THERMAL yr SLOPE yr 115 ELECTRIC POWER VALUE PRICED a1 51600 OLLI TItR ICflS butt Partial Ktts P & W Semi-Kilt Cacibined seilh full atripeOOd plan Nose bscl Wire Windose etc Mat Ncles may purchased Just semi kits sr seith plans- serite sr call prices i93f Baceaneerf4$Si 1936 Cilpiser MR i-72-$39 1937 Dollaire SptaertS5$ft 1940 Ravger-40 $27 1939 Mercury72$Sf 1935 MIss Ametitaf4559 1941 Playboy Jr-54-$29 1941 Playbsy Sr-fO$46 iS3f Power Hsasef4--$43 1940 Sailpiane-7f-- $74 1940 So Long-St$2f 1939 Trentsn Terror-72-$32 i939 ZipperS4--$49 i925 Ksrda Wokelield-44 $17 MIDtflAP MODEL CO Sems-kttS Combined u/strip 11311 Flying Qaaker-f4-$49 1937 Qualcer Flssh-07535 1937 Long Cabin79$42 1937 Air Cbieffl$40 STRUCKS 1940 79 Span 935 Sq uiOW ruler SEMI KIT Plan inclj $3300 Combo Pull Kit 56300 SCALE PLANS ond DRAWINGS SSO HEINKEL HEiSSO 02 SOs $1000 SHiPPINO AND HANDLiNO sge TALOGUE Up $900 sdd $150 $290 PP/lsl Class $501 $2990 add $225 copy mill sent $2001 $4509 add $300 free--when requested$45 01 $7009 add $350 order aver $7000 add $400 HOBBY HORN CA Addressees add 6% tax vahobby specialliesac Send 510 visa/MC#Eap 15173 Maran Street tAl Check allow up tO 30 PO Boa 2212 days check clearance Westminster Ca 92693 CDDEsact CharKes 719 893 8311 Fidi Cash OnlyliAll UPS 7t9 8901203 AIRCRAFT OUALITV ALLEN SCREW SETS FOR ALL BRAND ENGINES Screw Sets come complete Allen Wrench available American metric sizes Write Call free price list RJL INDUSTRIES PO BOX 5654 PASADENA CA 91107 213 359-0016 795-9821 30 PACIFIC ACE complete kit includes printwood stripwood wheels rubber propeller real Japanese tissue Price $750 Plus $150 5&H SEAGLEN MODEL CO Box 123 Plympton Ma 02367
Edition: Model Aviation - 1983/07
Page Numbers: 65, 160, 161, 164
Control Line RA CING John Ballard USE 10% NITRO must say response Racing enthusiasts over country subject limiting nitro content fuel has overwhelming received over 50 written responses Racers al state addition received nu merous long-distance phone calls ad ditional input seems areas country 10%-nitro rule has tried great success must admit contest St Louis Racing events will Midwest area has tried how- run 10% nitro furnished conever notice May Control Line Continued page 160 July 1983 65 Bob Kerr set WAM record 50001 recent meet San Jose CA Note circles laid out over speed bumps parking lot site Photo Vic Garner 5-oz-capacity Rat tank available either complete kit form See column details right Harters Proto speed pan altered fit OS 40applecheeks welded exterior machined Out fit crankcase 5-oz Rat tank installed THE MEN TRAINER Discover what thousands MEN TRAINER pilots have learnedthere easy way learn fly RJC Fly trainer specifically designed absolute beginner A/C Years design engineering flight testing updating have given plane its unique flight characteristics Make introduction A/C flying enjoyable experience MEN TRAINERs ultra stability slow flight characteristics will allow hands-off recovery control errors large size gives maximum visibility easy altitude recognition during learning process FEATURES Under-cambered wing ample dihedral slow 5 30 MPH stable flight3 lb flying weight average radio installedLarge roomy fuselage ease radio installation dy plywood-spruce-balsa construction withstand beginners abuse learning landEasy follow plans instructionpre-formed landing gear braceTHRU-CUT die cutting combined TRI SQUARE-LOC construction fast easy assembly Complete hardware packageMonokote cutting guide Building time 12 25 hours THE TWIN TRAINER youve always wanted fly twin have put off cost problems hazards MEN has airplane youve wating MEN TWIN TRAINER Weve taken ultra stable MEN TRAINER has introduced thousands modelers pleasures A/C modeling converted simple twin design can flown trimotori new MEN TWIN TRAINER available two ways complete kit already own MEN TRAINERS ass simple building wing kit nose conversion requires no further modification airplane Just switch wings youre off Model Engineering Norwalks THRU CUT die cutting combined TRI-SOUARE-LOC construc tion plywood balsa spruce make construction fast simple MEN TWIN TRAINER can flown two 09 15 engines three channel radio easy-flying twinengine fun MEN TWIN TRAINER cant beat THE MEN TRAINER Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 1904 476-8639 ENGINE SLEEVE & BEARING PULLER VPull Ihose tight sleeves bearings easily damage Cone grips sleeve bearing 10 cone espanding brass ring new 60s 17MM rear bearing Sleeve Puller $795* SPECIAL * Bearing Puller $695Both tar $1395 New New TUBE & SOCKETS I in dia aluminum alloy tubing plug-in wings Included pair special WING slip- fit phenolic sockets build Ihe wing-structure 2024 alum tube 24 long socket 12 long Iaet TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics its predecessors Especially recommended sportsman advanced pattern also good choice turn around pattern Plans construction hints $995 cowlings four times After get ting cowling shape want next step liberally apply several brushed-on coats Aero Gloss clear dope have found rebuilt fuel-soaked cowlings way get paint adhere repaired places have found necessary using epoxy-type paints repaint cowling After application Aero Gloss clear can switch other types dope epoxy-type paints can probably achieve complete re paintingof Stunt plane about two weeks working time get work day knows may come up ounce two lighter after repaint has done usual over haul least have plane fresh ened up maybe few cosmetic changes might fool flying friends itformation Stunt PAMPA contact Wvnt Paul 1640 Mavwick Dr Lexington KY 40504 CL Racing/Ballard Continued page 65 test management Furthermore find May 31 annual contest held Chi cago Treetown Club Racing events will use 10% nitro supplied site Racing community whole sup ports use 10% nitro Racing events ran equipment 10% nitro found does reduce air speed am sure whether aircraft has slowed down enough allow aver age intermediate-level modeler ability compete realistically pro fessionals flying same event Considerable rhetoric revolves around classification system Beginner Inter mediate Professionalor just possibly two categories Intermediate Professional know subject has hashed rehashed times Racing-participant meetings Nationals well newsletters has subject discussion various club meetings Im thinking about compiling input probably best procedure would itemize suggestions outline form print future column ask comments Racing competitors themselves As group can initiate meaningful rule changes will benefit majority Racing participants Cobra Rat Racer have several re quests measurements Dick Lamberts recently-designed Cobra racer unveiled 1982 Lincoln Nats Dick has made drawing giving basic measure ments Ive included months column can tell Cobra flew well Nats windy conditions 160 Model Aviation GP THE TWIN TRAINER S Your Dealer Order DIrect Include 75 Per Item UPS OIL BEGINNERS AND NOVICE FLYERS.Are hav ing trouble getting hang controlled RIO flying squirrely trainer Wait till experi ence smooth solid slow flight characteristics GOLDEN FALCON thin will say Now thats like EXPERIENCED FLYERS.ls fast-paced hotdogging trend R/O getting down would like spend really enjoyable relax ing afternoon flying field graceful yet aerobatic capabilities GOLDEN FALCON allow just thatENJOYI COMPLETE KIT.Except radio engine kit contains everything needed build flying model Wheels fuel tank Super Monokotecovering three types glue hardware connectors cowls etc.. nothing left out Compare other kits provide skeleton structure INSTRUCTIONS.The 48 page fully-illustrated stepby-step instruction manual takes guesswork out building radio installation PRE-FORMED PARTS.Wing saddle/windshield vacuum formed ribs formers pre cision die-cut several special parts injection molded added convenience JIG CONSTRUCTION.Six special jigs simplify assem bly holding parts alignment gluing ENGINE MOUNTUnique mounting system allows engine tank removed seconds inspec tion replacement PURE PLEASUREBuilding flying new GOLDEN FALCON sure provide enjoyable satisfying experience FOR MORE FREE INFORMATION WRITE OR CALL TODAY. ST CROIX OF PARK FALLS LTD PO BOX 279 PARK FALLS WI 54552 PHONE 715 762-3226 Dealer Inquiries Invited stopped required half-lap Dick also producing some glass tops will accommodate new OS40 big-block en gine has built-in exit hole minipipe tops building tips required can received Mr Dick Lambert 320 South Ridgewood Port Orange FL 32019 New 5-oz Rat Tank Available As Rat Racing enthusiasts aware problem getting enough fuel new highconsumption racing engines has prob lem past have used typical cylindrical tank homemade version same few years ago Dons Custom Tanks brought out five-oz Rat tank actual volume-measurement approximately 424 oz com petitors took old four-ounce cylindrical Rat Race tank chopped off rear added portion another tank receive full 4 5/4 oz volume required achieve consistent engine run 40-50 laps understand due much prodding Larry Dziak Dons has designed new tank now stock shipment tank has full five-oz volume avail able two modes first mode contains completed tank tubes mounted fill tube rear pressure tube running top stopping about -in rear tank typical Racing setup years second tank mode includes no tubes position merely fill-tube soldered place receive two pieces brass tubing rear end cap left off Racer may install tubes way sees fit certainly makes working tank much easier before tubes removed holes plugged resoldered addition new special freeze-out plug rear tankcap used give rear tank strength addition cap portion heav ier gauge metal reducing vibration point rear attachment pan Reworking Harters Rat pan accept OS 40 1 have several phone calls numerous letters concerning proper way rework Harters proto pan fit new OS Big Block 40 basi cally two methods first method entails very careful grinding pan meet block-width requirements engine elongating engine mounting-lug holes very close block engine can bolted down satisfactorily other method involves welding ap plecheeks pan requires new pan used since fuel-soaked ver sions weld satisfactorily welding extra meat original engine mountinglug bolt holes can used course large amount grinding still required clear engine block large shaft housing however additional meat welded exterior pan smoothed out form applecheek effect have enclosed picture pans doesnt hurt July 1983 161 LOOK AT THESE FEATURES AM4 Order 12 get Club e City State Imprinted AW FREE Quality Sportswear AMA Emblems ADJUSTABLE ONE- SIZE FITS ALL Sport caps in White Royal Blue full color AMA emblem EACH Add $100 per cap br poslage handling SPECIFY Summer Mesh El Winter PolyfoamEl Mail check order Printed Products Co Inc 20 Box 545 Harrisonville MO 64701 1-800-821-7822 MO call collect 1-816-884-3003 VISA and MasterCard Welcome call ior quaniliy discounis performance certainly strengthens frontal area pan considerably California Racing under adverse condi tions just received photograph Cal ifornia showing Bob Kerr just turned new WAM record time 50001 using muffler-equipped Rat Racer Mufflers required WAM rules picture can sec muffler protruding out area mini-pipe usually exits addi tion can see racing circles over lap speed bump parking lot guess can say racing under ad verse conditions' comments suggestions al ways appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 CL Speed/Hempel Continued page 66 rately however propellers required particular assumed brake horsepower rpm speed thrust horsepower required standard sea level atmospheric conditions study summaries points out tiny changes diameter pitch affect power requirement speed course propellers must have true helical pitch least 30%-radius point blade tips pitch/diameter ratio should di minish towards hub two-blade pro pellers suffer high tip-speed efficiency-loss requires greater en gine power Ditto one-blader although studied specifically Three bladed props appear provide power required minimum brake horsepower arid tip-speed efficiency-loss Three-blade smoothness circular flight may also plus So study FAI CL Speed airplane warts hope might reveal something useful different per spective o new idea stranger competition class Id happy receive Proxy/Hannan Continued page 69 can also soak up hours almost alarming fashion Allow adequate time shipping too air mail delays can occur models have known miss contests little day account Additional hang ups have encountered via postal strikes over-zealous customs officers hap pily such incidents have infrequent Careful packing must models transported safely unrealistic ex pect Fragile Side Up notices much protecting delicate models Rather should strive bullet-proof con tainer withstand anticipated stresses Small suitcases metal boxes wooden boxes reinforced cardboard cartons have successfully employed Some builders prefer box-within-a-box con cept may help isolate contents outside pressure shocks Continued page 165 comments critique findings best regards Jerry Rautio 18 Highland Ct Fitchburg MA 01420 Well fellow Speed fliers what think can write Jerry directly course Id like know what com ments too Remember Jerrys work based directly proven full-scale propeller-design science very difficult know what correction factors must applied model prac tices use very high rpms propblade airfoils almost microscopic com pared full-scale ones brings kinds air-property effects scaleinduced effects picture Yet various coefficients efficiency correc tion factors still exist us though may different imagined Jerrys investigation Its place start Gene Hempel 301 N Yale Dr. Garland TX 75042 Table 2 ENGINE/PROPELLER SuMMARIEs FOR CLEAN AIRPLANE THP 165 nel No BIadm 3 2 liochosi PlO BI-IP RPM MPH 6169c5667 918 19 39000 165 6895 58658902135000165 THP0 ToTCp 5971135257944980916 9401134257 745770390 FOR CLEAR AIRPLANE THP 170 mph 362 70 5834930 21 35000170 27045 6008852 237 35000170 8991238273047260913 5211236272649670286 FOR AvERAGE AIRPLANE THPr 165 mph 36301 5699904 21 39000165 27081 5801818 239 35000165 9861230279548150928 5151230279550690395 Propulsive efficiency maw elm airspeed THP0 Thesat HP available maw elm aiesoeod Ta Thrast lb available may dee airapead Ta ic thraso Est V 0 C0 Power CanffieientBHP 590 P an3 CT fivieet tftraat P 00239 tao-leeel nRPM/6Q 0Ojam. Pt KTipSpeecl Carrection Poelor 164 Model Aviation HOt*iy H am Wieg Span -789 9mg Area 550 Sq SENSOAR glider HOBBY HORN Eaclasivel HOBBY HORN Kit SENSOAR Glider kit high qaality kit Machine catsanded parts Select quality balsa spruce Detailed plans written restructrons Far THERMAL yr SLOPE yr 115 ELECTRIC POWER VALUE PRICED a1 51600 OLLI TItR ICflS butt Partial Ktts P & W Semi-Kilt Cacibined seilh full atripeOOd plan Nose bscl Wire Windose etc Mat Ncles may purchased Just semi kits sr seith plans- serite sr call prices i93f Baceaneerf4$Si 1936 Cilpiser MR i-72-$39 1937 Dollaire SptaertS5$ft 1940 Ravger-40 $27 1939 Mercury72$Sf 1935 MIss Ametitaf4559 1941 Playboy Jr-54-$29 1941 Playbsy Sr-fO$46 iS3f Power Hsasef4--$43 1940 Sailpiane-7f-- $74 1940 So Long-St$2f 1939 Trentsn Terror-72-$32 i939 ZipperS4--$49 i925 Ksrda Wokelield-44 $17 MIDtflAP MODEL CO Sems-kttS Combined u/strip 11311 Flying Qaaker-f4-$49 1937 Qualcer Flssh-07535 1937 Long Cabin79$42 1937 Air Cbieffl$40 STRUCKS 1940 79 Span 935 Sq uiOW ruler SEMI KIT Plan inclj $3300 Combo Pull Kit 56300 SCALE PLANS ond DRAWINGS SSO HEINKEL HEiSSO 02 SOs $1000 SHiPPINO AND HANDLiNO sge TALOGUE Up $900 sdd $150 $290 PP/lsl Class $501 $2990 add $225 copy mill sent $2001 $4509 add $300 free--when requested$45 01 $7009 add $350 order aver $7000 add $400 HOBBY HORN CA Addressees add 6% tax vahobby specialliesac Send 510 visa/MC#Eap 15173 Maran Street tAl Check allow up tO 30 PO Boa 2212 days check clearance Westminster Ca 92693 CDDEsact CharKes 719 893 8311 Fidi Cash OnlyliAll UPS 7t9 8901203 AIRCRAFT OUALITV ALLEN SCREW SETS FOR ALL BRAND ENGINES Screw Sets come complete Allen Wrench available American metric sizes Write Call free price list RJL INDUSTRIES PO BOX 5654 PASADENA CA 91107 213 359-0016 795-9821 30 PACIFIC ACE complete kit includes printwood stripwood wheels rubber propeller real Japanese tissue Price $750 Plus $150 5&H SEAGLEN MODEL CO Box 123 Plympton Ma 02367
Edition: Model Aviation - 1983/07
Page Numbers: 65, 160, 161, 164
Control Line RA CING John Ballard USE 10% NITRO must say response Racing enthusiasts over country subject limiting nitro content fuel has overwhelming received over 50 written responses Racers al state addition received nu merous long-distance phone calls ad ditional input seems areas country 10%-nitro rule has tried great success must admit contest St Louis Racing events will Midwest area has tried how- run 10% nitro furnished conever notice May Control Line Continued page 160 July 1983 65 Bob Kerr set WAM record 50001 recent meet San Jose CA Note circles laid out over speed bumps parking lot site Photo Vic Garner 5-oz-capacity Rat tank available either complete kit form See column details right Harters Proto speed pan altered fit OS 40applecheeks welded exterior machined Out fit crankcase 5-oz Rat tank installed THE MEN TRAINER Discover what thousands MEN TRAINER pilots have learnedthere easy way learn fly RJC Fly trainer specifically designed absolute beginner A/C Years design engineering flight testing updating have given plane its unique flight characteristics Make introduction A/C flying enjoyable experience MEN TRAINERs ultra stability slow flight characteristics will allow hands-off recovery control errors large size gives maximum visibility easy altitude recognition during learning process FEATURES Under-cambered wing ample dihedral slow 5 30 MPH stable flight3 lb flying weight average radio installedLarge roomy fuselage ease radio installation dy plywood-spruce-balsa construction withstand beginners abuse learning landEasy follow plans instructionpre-formed landing gear braceTHRU-CUT die cutting combined TRI SQUARE-LOC construction fast easy assembly Complete hardware packageMonokote cutting guide Building time 12 25 hours THE TWIN TRAINER youve always wanted fly twin have put off cost problems hazards MEN has airplane youve wating MEN TWIN TRAINER Weve taken ultra stable MEN TRAINER has introduced thousands modelers pleasures A/C modeling converted simple twin design can flown trimotori new MEN TWIN TRAINER available two ways complete kit already own MEN TRAINERS ass simple building wing kit nose conversion requires no further modification airplane Just switch wings youre off Model Engineering Norwalks THRU CUT die cutting combined TRI-SOUARE-LOC construc tion plywood balsa spruce make construction fast simple MEN TWIN TRAINER can flown two 09 15 engines three channel radio easy-flying twinengine fun MEN TWIN TRAINER cant beat THE MEN TRAINER Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 1904 476-8639 ENGINE SLEEVE & BEARING PULLER VPull Ihose tight sleeves bearings easily damage Cone grips sleeve bearing 10 cone espanding brass ring new 60s 17MM rear bearing Sleeve Puller $795* SPECIAL * Bearing Puller $695Both tar $1395 New New TUBE & SOCKETS I in dia aluminum alloy tubing plug-in wings Included pair special WING slip- fit phenolic sockets build Ihe wing-structure 2024 alum tube 24 long socket 12 long Iaet TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics its predecessors Especially recommended sportsman advanced pattern also good choice turn around pattern Plans construction hints $995 cowlings four times After get ting cowling shape want next step liberally apply several brushed-on coats Aero Gloss clear dope have found rebuilt fuel-soaked cowlings way get paint adhere repaired places have found necessary using epoxy-type paints repaint cowling After application Aero Gloss clear can switch other types dope epoxy-type paints can probably achieve complete re paintingof Stunt plane about two weeks working time get work day knows may come up ounce two lighter after repaint has done usual over haul least have plane fresh ened up maybe few cosmetic changes might fool flying friends itformation Stunt PAMPA contact Wvnt Paul 1640 Mavwick Dr Lexington KY 40504 CL Racing/Ballard Continued page 65 test management Furthermore find May 31 annual contest held Chi cago Treetown Club Racing events will use 10% nitro supplied site Racing community whole sup ports use 10% nitro Racing events ran equipment 10% nitro found does reduce air speed am sure whether aircraft has slowed down enough allow aver age intermediate-level modeler ability compete realistically pro fessionals flying same event Considerable rhetoric revolves around classification system Beginner Inter mediate Professionalor just possibly two categories Intermediate Professional know subject has hashed rehashed times Racing-participant meetings Nationals well newsletters has subject discussion various club meetings Im thinking about compiling input probably best procedure would itemize suggestions outline form print future column ask comments Racing competitors themselves As group can initiate meaningful rule changes will benefit majority Racing participants Cobra Rat Racer have several re quests measurements Dick Lamberts recently-designed Cobra racer unveiled 1982 Lincoln Nats Dick has made drawing giving basic measure ments Ive included months column can tell Cobra flew well Nats windy conditions 160 Model Aviation GP THE TWIN TRAINER S Your Dealer Order DIrect Include 75 Per Item UPS OIL BEGINNERS AND NOVICE FLYERS.Are hav ing trouble getting hang controlled RIO flying squirrely trainer Wait till experi ence smooth solid slow flight characteristics GOLDEN FALCON thin will say Now thats like EXPERIENCED FLYERS.ls fast-paced hotdogging trend R/O getting down would like spend really enjoyable relax ing afternoon flying field graceful yet aerobatic capabilities GOLDEN FALCON allow just thatENJOYI COMPLETE KIT.Except radio engine kit contains everything needed build flying model Wheels fuel tank Super Monokotecovering three types glue hardware connectors cowls etc.. nothing left out Compare other kits provide skeleton structure INSTRUCTIONS.The 48 page fully-illustrated stepby-step instruction manual takes guesswork out building radio installation PRE-FORMED PARTS.Wing saddle/windshield vacuum formed ribs formers pre cision die-cut several special parts injection molded added convenience JIG CONSTRUCTION.Six special jigs simplify assem bly holding parts alignment gluing ENGINE MOUNTUnique mounting system allows engine tank removed seconds inspec tion replacement PURE PLEASUREBuilding flying new GOLDEN FALCON sure provide enjoyable satisfying experience FOR MORE FREE INFORMATION WRITE OR CALL TODAY. ST CROIX OF PARK FALLS LTD PO BOX 279 PARK FALLS WI 54552 PHONE 715 762-3226 Dealer Inquiries Invited stopped required half-lap Dick also producing some glass tops will accommodate new OS40 big-block en gine has built-in exit hole minipipe tops building tips required can received Mr Dick Lambert 320 South Ridgewood Port Orange FL 32019 New 5-oz Rat Tank Available As Rat Racing enthusiasts aware problem getting enough fuel new highconsumption racing engines has prob lem past have used typical cylindrical tank homemade version same few years ago Dons Custom Tanks brought out five-oz Rat tank actual volume-measurement approximately 424 oz com petitors took old four-ounce cylindrical Rat Race tank chopped off rear added portion another tank receive full 4 5/4 oz volume required achieve consistent engine run 40-50 laps understand due much prodding Larry Dziak Dons has designed new tank now stock shipment tank has full five-oz volume avail able two modes first mode contains completed tank tubes mounted fill tube rear pressure tube running top stopping about -in rear tank typical Racing setup years second tank mode includes no tubes position merely fill-tube soldered place receive two pieces brass tubing rear end cap left off Racer may install tubes way sees fit certainly makes working tank much easier before tubes removed holes plugged resoldered addition new special freeze-out plug rear tankcap used give rear tank strength addition cap portion heav ier gauge metal reducing vibration point rear attachment pan Reworking Harters Rat pan accept OS 40 1 have several phone calls numerous letters concerning proper way rework Harters proto pan fit new OS Big Block 40 basi cally two methods first method entails very careful grinding pan meet block-width requirements engine elongating engine mounting-lug holes very close block engine can bolted down satisfactorily other method involves welding ap plecheeks pan requires new pan used since fuel-soaked ver sions weld satisfactorily welding extra meat original engine mountinglug bolt holes can used course large amount grinding still required clear engine block large shaft housing however additional meat welded exterior pan smoothed out form applecheek effect have enclosed picture pans doesnt hurt July 1983 161 LOOK AT THESE FEATURES AM4 Order 12 get Club e City State Imprinted AW FREE Quality Sportswear AMA Emblems ADJUSTABLE ONE- SIZE FITS ALL Sport caps in White Royal Blue full color AMA emblem EACH Add $100 per cap br poslage handling SPECIFY Summer Mesh El Winter PolyfoamEl Mail check order Printed Products Co Inc 20 Box 545 Harrisonville MO 64701 1-800-821-7822 MO call collect 1-816-884-3003 VISA and MasterCard Welcome call ior quaniliy discounis performance certainly strengthens frontal area pan considerably California Racing under adverse condi tions just received photograph Cal ifornia showing Bob Kerr just turned new WAM record time 50001 using muffler-equipped Rat Racer Mufflers required WAM rules picture can sec muffler protruding out area mini-pipe usually exits addi tion can see racing circles over lap speed bump parking lot guess can say racing under ad verse conditions' comments suggestions al ways appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 CL Speed/Hempel Continued page 66 rately however propellers required particular assumed brake horsepower rpm speed thrust horsepower required standard sea level atmospheric conditions study summaries points out tiny changes diameter pitch affect power requirement speed course propellers must have true helical pitch least 30%-radius point blade tips pitch/diameter ratio should di minish towards hub two-blade pro pellers suffer high tip-speed efficiency-loss requires greater en gine power Ditto one-blader although studied specifically Three bladed props appear provide power required minimum brake horsepower arid tip-speed efficiency-loss Three-blade smoothness circular flight may also plus So study FAI CL Speed airplane warts hope might reveal something useful different per spective o new idea stranger competition class Id happy receive Proxy/Hannan Continued page 69 can also soak up hours almost alarming fashion Allow adequate time shipping too air mail delays can occur models have known miss contests little day account Additional hang ups have encountered via postal strikes over-zealous customs officers hap pily such incidents have infrequent Careful packing must models transported safely unrealistic ex pect Fragile Side Up notices much protecting delicate models Rather should strive bullet-proof con tainer withstand anticipated stresses Small suitcases metal boxes wooden boxes reinforced cardboard cartons have successfully employed Some builders prefer box-within-a-box con cept may help isolate contents outside pressure shocks Continued page 165 comments critique findings best regards Jerry Rautio 18 Highland Ct Fitchburg MA 01420 Well fellow Speed fliers what think can write Jerry directly course Id like know what com ments too Remember Jerrys work based directly proven full-scale propeller-design science very difficult know what correction factors must applied model prac tices use very high rpms propblade airfoils almost microscopic com pared full-scale ones brings kinds air-property effects scaleinduced effects picture Yet various coefficients efficiency correc tion factors still exist us though may different imagined Jerrys investigation Its place start Gene Hempel 301 N Yale Dr. Garland TX 75042 Table 2 ENGINE/PROPELLER SuMMARIEs FOR CLEAN AIRPLANE THP 165 nel No BIadm 3 2 liochosi PlO BI-IP RPM MPH 6169c5667 918 19 39000 165 6895 58658902135000165 THP0 ToTCp 5971135257944980916 9401134257 745770390 FOR CLEAR AIRPLANE THP 170 mph 362 70 5834930 21 35000170 27045 6008852 237 35000170 8991238273047260913 5211236272649670286 FOR AvERAGE AIRPLANE THPr 165 mph 36301 5699904 21 39000165 27081 5801818 239 35000165 9861230279548150928 5151230279550690395 Propulsive efficiency maw elm airspeed THP0 Thesat HP available maw elm aiesoeod Ta Thrast lb available may dee airapead Ta ic thraso Est V 0 C0 Power CanffieientBHP 590 P an3 CT fivieet tftraat P 00239 tao-leeel nRPM/6Q 0Ojam. Pt KTipSpeecl Carrection Poelor 164 Model Aviation HOt*iy H am Wieg Span -789 9mg Area 550 Sq SENSOAR glider HOBBY HORN Eaclasivel HOBBY HORN Kit SENSOAR Glider kit high qaality kit Machine catsanded parts Select quality balsa spruce Detailed plans written restructrons Far THERMAL yr SLOPE yr 115 ELECTRIC POWER VALUE PRICED a1 51600 OLLI TItR ICflS butt Partial Ktts P & W Semi-Kilt Cacibined seilh full atripeOOd plan Nose bscl Wire Windose etc Mat Ncles may purchased Just semi kits sr seith plans- serite sr call prices i93f Baceaneerf4$Si 1936 Cilpiser MR i-72-$39 1937 Dollaire SptaertS5$ft 1940 Ravger-40 $27 1939 Mercury72$Sf 1935 MIss Ametitaf4559 1941 Playboy Jr-54-$29 1941 Playbsy Sr-fO$46 iS3f Power Hsasef4--$43 1940 Sailpiane-7f-- $74 1940 So Long-St$2f 1939 Trentsn Terror-72-$32 i939 ZipperS4--$49 i925 Ksrda Wokelield-44 $17 MIDtflAP MODEL CO Sems-kttS Combined u/strip 11311 Flying Qaaker-f4-$49 1937 Qualcer Flssh-07535 1937 Long Cabin79$42 1937 Air Cbieffl$40 STRUCKS 1940 79 Span 935 Sq uiOW ruler SEMI KIT Plan inclj $3300 Combo Pull Kit 56300 SCALE PLANS ond DRAWINGS SSO HEINKEL HEiSSO 02 SOs $1000 SHiPPINO AND HANDLiNO sge TALOGUE Up $900 sdd $150 $290 PP/lsl Class $501 $2990 add $225 copy mill sent $2001 $4509 add $300 free--when requested$45 01 $7009 add $350 order aver $7000 add $400 HOBBY HORN CA Addressees add 6% tax vahobby specialliesac Send 510 visa/MC#Eap 15173 Maran Street tAl Check allow up tO 30 PO Boa 2212 days check clearance Westminster Ca 92693 CDDEsact CharKes 719 893 8311 Fidi Cash OnlyliAll UPS 7t9 8901203 AIRCRAFT OUALITV ALLEN SCREW SETS FOR ALL BRAND ENGINES Screw Sets come complete Allen Wrench available American metric sizes Write Call free price list RJL INDUSTRIES PO BOX 5654 PASADENA CA 91107 213 359-0016 795-9821 30 PACIFIC ACE complete kit includes printwood stripwood wheels rubber propeller real Japanese tissue Price $750 Plus $150 5&H SEAGLEN MODEL CO Box 123 Plympton Ma 02367
Edition: Model Aviation - 1983/07
Page Numbers: 65, 160, 161, 164
Control Line RA CING John Ballard USE 10% NITRO must say response Racing enthusiasts over country subject limiting nitro content fuel has overwhelming received over 50 written responses Racers al state addition received nu merous long-distance phone calls ad ditional input seems areas country 10%-nitro rule has tried great success must admit contest St Louis Racing events will Midwest area has tried how- run 10% nitro furnished conever notice May Control Line Continued page 160 July 1983 65 Bob Kerr set WAM record 50001 recent meet San Jose CA Note circles laid out over speed bumps parking lot site Photo Vic Garner 5-oz-capacity Rat tank available either complete kit form See column details right Harters Proto speed pan altered fit OS 40applecheeks welded exterior machined Out fit crankcase 5-oz Rat tank installed THE MEN TRAINER Discover what thousands MEN TRAINER pilots have learnedthere easy way learn fly RJC Fly trainer specifically designed absolute beginner A/C Years design engineering flight testing updating have given plane its unique flight characteristics Make introduction A/C flying enjoyable experience MEN TRAINERs ultra stability slow flight characteristics will allow hands-off recovery control errors large size gives maximum visibility easy altitude recognition during learning process FEATURES Under-cambered wing ample dihedral slow 5 30 MPH stable flight3 lb flying weight average radio installedLarge roomy fuselage ease radio installation dy plywood-spruce-balsa construction withstand beginners abuse learning landEasy follow plans instructionpre-formed landing gear braceTHRU-CUT die cutting combined TRI SQUARE-LOC construction fast easy assembly Complete hardware packageMonokote cutting guide Building time 12 25 hours THE TWIN TRAINER youve always wanted fly twin have put off cost problems hazards MEN has airplane youve wating MEN TWIN TRAINER Weve taken ultra stable MEN TRAINER has introduced thousands modelers pleasures A/C modeling converted simple twin design can flown trimotori new MEN TWIN TRAINER available two ways complete kit already own MEN TRAINERS ass simple building wing kit nose conversion requires no further modification airplane Just switch wings youre off Model Engineering Norwalks THRU CUT die cutting combined TRI-SOUARE-LOC construc tion plywood balsa spruce make construction fast simple MEN TWIN TRAINER can flown two 09 15 engines three channel radio easy-flying twinengine fun MEN TWIN TRAINER cant beat THE MEN TRAINER Gator RIC Products 3713 Pompano Dr Pensacola FL 32514 Phone AC 1904 476-8639 ENGINE SLEEVE & BEARING PULLER VPull Ihose tight sleeves bearings easily damage Cone grips sleeve bearing 10 cone espanding brass ring new 60s 17MM rear bearing Sleeve Puller $795* SPECIAL * Bearing Puller $695Both tar $1395 New New TUBE & SOCKETS I in dia aluminum alloy tubing plug-in wings Included pair special WING slip- fit phenolic sockets build Ihe wing-structure 2024 alum tube 24 long socket 12 long Iaet TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics its predecessors Especially recommended sportsman advanced pattern also good choice turn around pattern Plans construction hints $995 cowlings four times After get ting cowling shape want next step liberally apply several brushed-on coats Aero Gloss clear dope have found rebuilt fuel-soaked cowlings way get paint adhere repaired places have found necessary using epoxy-type paints repaint cowling After application Aero Gloss clear can switch other types dope epoxy-type paints can probably achieve complete re paintingof Stunt plane about two weeks working time get work day knows may come up ounce two lighter after repaint has done usual over haul least have plane fresh ened up maybe few cosmetic changes might fool flying friends itformation Stunt PAMPA contact Wvnt Paul 1640 Mavwick Dr Lexington KY 40504 CL Racing/Ballard Continued page 65 test management Furthermore find May 31 annual contest held Chi cago Treetown Club Racing events will use 10% nitro supplied site Racing community whole sup ports use 10% nitro Racing events ran equipment 10% nitro found does reduce air speed am sure whether aircraft has slowed down enough allow aver age intermediate-level modeler ability compete realistically pro fessionals flying same event Considerable rhetoric revolves around classification system Beginner Inter mediate Professionalor just possibly two categories Intermediate Professional know subject has hashed rehashed times Racing-participant meetings Nationals well newsletters has subject discussion various club meetings Im thinking about compiling input probably best procedure would itemize suggestions outline form print future column ask comments Racing competitors themselves As group can initiate meaningful rule changes will benefit majority Racing participants Cobra Rat Racer have several re quests measurements Dick Lamberts recently-designed Cobra racer unveiled 1982 Lincoln Nats Dick has made drawing giving basic measure ments Ive included months column can tell Cobra flew well Nats windy conditions 160 Model Aviation GP THE TWIN TRAINER S Your Dealer Order DIrect Include 75 Per Item UPS OIL BEGINNERS AND NOVICE FLYERS.Are hav ing trouble getting hang controlled RIO flying squirrely trainer Wait till experi ence smooth solid slow flight characteristics GOLDEN FALCON thin will say Now thats like EXPERIENCED FLYERS.ls fast-paced hotdogging trend R/O getting down would like spend really enjoyable relax ing afternoon flying field graceful yet aerobatic capabilities GOLDEN FALCON allow just thatENJOYI COMPLETE KIT.Except radio engine kit contains everything needed build flying model Wheels fuel tank Super Monokotecovering three types glue hardware connectors cowls etc.. nothing left out Compare other kits provide skeleton structure INSTRUCTIONS.The 48 page fully-illustrated stepby-step instruction manual takes guesswork out building radio installation PRE-FORMED PARTS.Wing saddle/windshield vacuum formed ribs formers pre cision die-cut several special parts injection molded added convenience JIG CONSTRUCTION.Six special jigs simplify assem bly holding parts alignment gluing ENGINE MOUNTUnique mounting system allows engine tank removed seconds inspec tion replacement PURE PLEASUREBuilding flying new GOLDEN FALCON sure provide enjoyable satisfying experience FOR MORE FREE INFORMATION WRITE OR CALL TODAY. ST CROIX OF PARK FALLS LTD PO BOX 279 PARK FALLS WI 54552 PHONE 715 762-3226 Dealer Inquiries Invited stopped required half-lap Dick also producing some glass tops will accommodate new OS40 big-block en gine has built-in exit hole minipipe tops building tips required can received Mr Dick Lambert 320 South Ridgewood Port Orange FL 32019 New 5-oz Rat Tank Available As Rat Racing enthusiasts aware problem getting enough fuel new highconsumption racing engines has prob lem past have used typical cylindrical tank homemade version same few years ago Dons Custom Tanks brought out five-oz Rat tank actual volume-measurement approximately 424 oz com petitors took old four-ounce cylindrical Rat Race tank chopped off rear added portion another tank receive full 4 5/4 oz volume required achieve consistent engine run 40-50 laps understand due much prodding Larry Dziak Dons has designed new tank now stock shipment tank has full five-oz volume avail able two modes first mode contains completed tank tubes mounted fill tube rear pressure tube running top stopping about -in rear tank typical Racing setup years second tank mode includes no tubes position merely fill-tube soldered place receive two pieces brass tubing rear end cap left off Racer may install tubes way sees fit certainly makes working tank much easier before tubes removed holes plugged resoldered addition new special freeze-out plug rear tankcap used give rear tank strength addition cap portion heav ier gauge metal reducing vibration point rear attachment pan Reworking Harters Rat pan accept OS 40 1 have several phone calls numerous letters concerning proper way rework Harters proto pan fit new OS Big Block 40 basi cally two methods first method entails very careful grinding pan meet block-width requirements engine elongating engine mounting-lug holes very close block engine can bolted down satisfactorily other method involves welding ap plecheeks pan requires new pan used since fuel-soaked ver sions weld satisfactorily welding extra meat original engine mountinglug bolt holes can used course large amount grinding still required clear engine block large shaft housing however additional meat welded exterior pan smoothed out form applecheek effect have enclosed picture pans doesnt hurt July 1983 161 LOOK AT THESE FEATURES AM4 Order 12 get Club e City State Imprinted AW FREE Quality Sportswear AMA Emblems ADJUSTABLE ONE- SIZE FITS ALL Sport caps in White Royal Blue full color AMA emblem EACH Add $100 per cap br poslage handling SPECIFY Summer Mesh El Winter PolyfoamEl Mail check order Printed Products Co Inc 20 Box 545 Harrisonville MO 64701 1-800-821-7822 MO call collect 1-816-884-3003 VISA and MasterCard Welcome call ior quaniliy discounis performance certainly strengthens frontal area pan considerably California Racing under adverse condi tions just received photograph Cal ifornia showing Bob Kerr just turned new WAM record time 50001 using muffler-equipped Rat Racer Mufflers required WAM rules picture can sec muffler protruding out area mini-pipe usually exits addi tion can see racing circles over lap speed bump parking lot guess can say racing under ad verse conditions' comments suggestions al ways appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 CL Speed/Hempel Continued page 66 rately however propellers required particular assumed brake horsepower rpm speed thrust horsepower required standard sea level atmospheric conditions study summaries points out tiny changes diameter pitch affect power requirement speed course propellers must have true helical pitch least 30%-radius point blade tips pitch/diameter ratio should di minish towards hub two-blade pro pellers suffer high tip-speed efficiency-loss requires greater en gine power Ditto one-blader although studied specifically Three bladed props appear provide power required minimum brake horsepower arid tip-speed efficiency-loss Three-blade smoothness circular flight may also plus So study FAI CL Speed airplane warts hope might reveal something useful different per spective o new idea stranger competition class Id happy receive Proxy/Hannan Continued page 69 can also soak up hours almost alarming fashion Allow adequate time shipping too air mail delays can occur models have known miss contests little day account Additional hang ups have encountered via postal strikes over-zealous customs officers hap pily such incidents have infrequent Careful packing must models transported safely unrealistic ex pect Fragile Side Up notices much protecting delicate models Rather should strive bullet-proof con tainer withstand anticipated stresses Small suitcases metal boxes wooden boxes reinforced cardboard cartons have successfully employed Some builders prefer box-within-a-box con cept may help isolate contents outside pressure shocks Continued page 165 comments critique findings best regards Jerry Rautio 18 Highland Ct Fitchburg MA 01420 Well fellow Speed fliers what think can write Jerry directly course Id like know what com ments too Remember Jerrys work based directly proven full-scale propeller-design science very difficult know what correction factors must applied model prac tices use very high rpms propblade airfoils almost microscopic com pared full-scale ones brings kinds air-property effects scaleinduced effects picture Yet various coefficients efficiency correc tion factors still exist us though may different imagined Jerrys investigation Its place start Gene Hempel 301 N Yale Dr. Garland TX 75042 Table 2 ENGINE/PROPELLER SuMMARIEs FOR CLEAN AIRPLANE THP 165 nel No BIadm 3 2 liochosi PlO BI-IP RPM MPH 6169c5667 918 19 39000 165 6895 58658902135000165 THP0 ToTCp 5971135257944980916 9401134257 745770390 FOR CLEAR AIRPLANE THP 170 mph 362 70 5834930 21 35000170 27045 6008852 237 35000170 8991238273047260913 5211236272649670286 FOR AvERAGE AIRPLANE THPr 165 mph 36301 5699904 21 39000165 27081 5801818 239 35000165 9861230279548150928 5151230279550690395 Propulsive efficiency maw elm airspeed THP0 Thesat HP available maw elm aiesoeod Ta Thrast lb available may dee airapead Ta ic thraso Est V 0 C0 Power CanffieientBHP 590 P an3 CT fivieet tftraat P 00239 tao-leeel nRPM/6Q 0Ojam. Pt KTipSpeecl Carrection Poelor 164 Model Aviation HOt*iy H am Wieg Span -789 9mg Area 550 Sq SENSOAR glider HOBBY HORN Eaclasivel HOBBY HORN Kit SENSOAR Glider kit high qaality kit Machine catsanded parts Select quality balsa spruce Detailed plans written restructrons Far THERMAL yr SLOPE yr 115 ELECTRIC POWER VALUE PRICED a1 51600 OLLI TItR ICflS butt Partial Ktts P & W Semi-Kilt Cacibined seilh full atripeOOd plan Nose bscl Wire Windose etc Mat Ncles may purchased Just semi kits sr seith plans- serite sr call prices i93f Baceaneerf4$Si 1936 Cilpiser MR i-72-$39 1937 Dollaire SptaertS5$ft 1940 Ravger-40 $27 1939 Mercury72$Sf 1935 MIss Ametitaf4559 1941 Playboy Jr-54-$29 1941 Playbsy Sr-fO$46 iS3f Power Hsasef4--$43 1940 Sailpiane-7f-- $74 1940 So Long-St$2f 1939 Trentsn Terror-72-$32 i939 ZipperS4--$49 i925 Ksrda Wokelield-44 $17 MIDtflAP MODEL CO Sems-kttS Combined u/strip 11311 Flying Qaaker-f4-$49 1937 Qualcer Flssh-07535 1937 Long Cabin79$42 1937 Air Cbieffl$40 STRUCKS 1940 79 Span 935 Sq uiOW ruler SEMI KIT Plan inclj $3300 Combo Pull Kit 56300 SCALE PLANS ond DRAWINGS SSO HEINKEL HEiSSO 02 SOs $1000 SHiPPINO AND HANDLiNO sge TALOGUE Up $900 sdd $150 $290 PP/lsl Class $501 $2990 add $225 copy mill sent $2001 $4509 add $300 free--when requested$45 01 $7009 add $350 order aver $7000 add $400 HOBBY HORN CA Addressees add 6% tax vahobby specialliesac Send 510 visa/MC#Eap 15173 Maran Street tAl Check allow up tO 30 PO Boa 2212 days check clearance Westminster Ca 92693 CDDEsact CharKes 719 893 8311 Fidi Cash OnlyliAll UPS 7t9 8901203 AIRCRAFT OUALITV ALLEN SCREW SETS FOR ALL BRAND ENGINES Screw Sets come complete Allen Wrench available American metric sizes Write Call free price list RJL INDUSTRIES PO BOX 5654 PASADENA CA 91107 213 359-0016 795-9821 30 PACIFIC ACE complete kit includes printwood stripwood wheels rubber propeller real Japanese tissue Price $750 Plus $150 5&H SEAGLEN MODEL CO Box 123 Plympton Ma 02367