Free Flight Old- Timers Clarence Haught MASTER CRAFTSMAN Herb Wahi know has deeply involved modeling production ignition engines parts services years Since 1965 has involved no less four major engine-building projects first involved Hurleman engines made original parts combined newly-manufactured ones engines identified Herbs serial numbers markings fact Herb makes effort prevent confusion engines originals second project Anniversary Brown Jr engines limited quantity followed Wahi-Brown Jr Clas sic Custom Special Engines change pace pro duced Ohlsson Commemorative engines through period Herb also produced multitude replacement partsincluding spark plugs Herbs engines replicas clearly identifiable composite design special markings point very fussy about Hes just announced new exciting project However time will replica will continuation original production Lykens Brown Bill Brown designer Brown Junior visualized trend toward smaller engines produced 100 Lykens Browns mid Thirties 12 cubic inch dis placement engines advanced time reverse-loop-scavenged design resembling larger Brown Junior ap pearance Since Bill produced 100 original engines new ones will begin serial number 101 concept possible Bill Brown himself assisted son Dave will doing production Herb doing few functions process engine will course made original con struction methods including sand cast ings etc will distinguishable original 100 will officially known Lykens Brown Ltd Engines will shipped spark plugs purchasers will have opportunity fit original Champion V-2 plugs Herb does have Japanese / x 32 plug available well coils condensers etc engine will include booklet pre pared Bill Brown giving history interesting facts about its creation Herbs Model Motors Box 61 Forksville PA 18618 will sole distributor Write him detalls well other items including Brown Jr Hurle man engines Orders will filled order received serious may want call him 717 924-3892 Catalogs stuff Its since included section column devoted fulfilling needs infor mation help Old-Timer enthusiasts First Willamette Modelers Club Inc has few copies new Directory Northwest Area Free Flighters1985 available 21-page directory lists known Free Flighters Pacific North west includes interest areas and/or events flown may seem valuable folks Northwest provides useful contacts vacationers vendors specialized Free Flight products can get copy send ing buck Bob Stalick 5066 NW Picadilly Circle Albany OR 97321 Continued page 146 Nostalgia Gas plane Greg Davis Vancouver BC Edwin Howe-designed Big Stars 1 design published Flying Models magazine 1955 Ship powered old-style OS Max 29 Greg uses atight righthand corkscrew power pattern Bruce Augustus built line example Carl Goldberg Zipper R Power O& R 29 ignition Carl Goldberg gene now contributions Free Flight will live forever innovations include pylon wing mounts pop-up-tail dethermalizers Don Jenkins indiana p oils IN flips p rap Bunch Tiger engine Foo-to-U Pylon model 1 Crafts pink silk covering makes easy spot either air groundlbrush/treelweeds flight box made empty vegetable cans soldered together Bruce Augustus Sun Valley ID built 8-ft.span Lanzo Record Breaker R Onlookers Janet Julia Augustus 58 Model Aviation CLEVELAND GIANTSI NEW FOR GIAMTSALE BUFFS WarMs Largest Gas Plans Assaitme RNATIONALLY FAMOUS CD OUAILTE MASTER MODELS PLANS 54SDDenoinelle 21 Sd 70Connol Cot PEYSA $42 72Cor 0201/4 L&S $46 104 Con Cot PEYSA $56 62 Ronnord Bone Ike $42 96 Wright-Nonytone $48r- 77 Boeing B17G Fern $35 22 WWrnnl2I Red 1 $36 03 50 8170 Fort $25 77 W-Wnrnl2l Red L $48 6$ Dons 046A 06 $32 84 Fobber D7 Ftr 039 108 Sikor S38 Aropir $49 6$ Honnond Pete Ron 032i 60 Roe 100 SpOrt $36 72 Boylen Gee-Bee $32T 90 Boe 100 $901 $49 60 Soperrnorine S6B $24 90 Stinn Lorn Wing 056 89 Soporniorine 068 $32 80 Mortin 74 7dM-I $39 62 Corn Hoonk P-6E $42 7$ ff9ge 2400 Bonrb 542 94 CorHerln P6E Fm DUd 104 89g 0400 Ron $26 62 Loolnfreed V9 $24 60 MCfnino Clipper $55 74 Doolittlen 0-B Il $450 97 MChine Clippen 075 95 Mononeop Sport $36 68 Wentl Wfnirlnniod $32 80 Ho11 Spr Bolidog $43 68 Ryon Nonion $39 107 Aerenno C3 Spi $35 68 BBononno V ToI $29 61 Dooglo 038 Ob $32 77 Lonoonnbn Sedon $25 122 Deoglon 0-3rOb $49 73 N M rnlr Sonib $49 94 Fogen Cort Boner $45 65 MMo node B 26 $49 71 Mortin $10 Bonrb $39 8109 Monqo Rb $42 7g Tornern WW Ron 055 10009 Monqo Bomb $55 R S3 Coo 0ohk 91 1C2 $42 96 Sneo PTl7Koydet $56 r Oonhk F11C2 05499 NBOo Wdooo 901 $69 O6De8enCenretRoo534 71Doog DC3ton $22 * oonMrMollignn 035 95 200$ DC 3 T en 055 94 onnMr Molligon 545 06 Hninlnn Tenoco 13 $32 63 Boeing P26A FIr $36 108 Co 0251 4 t&S 05684 Boeing P-26A 9rr 04R 60 Doing M 2 824 69 Wooo C6 Cobin $36 68 $r ntn Bolldog Ft $30 64 Seech C17B Slog 038 29 BronortoneMnt $54 enIr C17B Stog 049 127 Oroirn teeron 909 $54 nob II Ileorro $30 73 Tronel 0000 $24 85 Look 11 Olentro 040 107 Met MO Ron $44 62 Stinnon T W SR7 016 01 Lindlne Sn tAO 311 $39 81 Stinnon TW 5R7 524 lOg Fo di PT1O T $29 122 Utinnon T W 097 038 90 Wono Toper Wiog $39 ristol FIr F2B $30 75 WentI d Lynonder $32 78 Brintol Ftr 92-B $32 100 Wont1 d Lynonder 049 118 Brintol Fe 92-B $4957 Fond Tnjnntr 4-AT$28__ 74 T-L Penno Spen 045776 Fond Trintr 4AT$45 63 Skyronbet 09591 $20114 Ford Trjntr 4-AT059 * 56 Cor Werfrb 9-40 02484 Berl-Joyoe TFJ-2$06 78 Lonk Liglrtng pg 02893 Loening C-2Arnplr$69 56 Rep Sen-Bee Ann 07458 GronnJ2-F Donk$39 74 BepSee-8 Ann9b $3978 Oronn12F Donk$56 106 Piper J-3 Cob 039 59 Gone GIV Born022 98 Look Hodnon Enib 838117 Gotfro O1V Bonn039 63 Gron 969 Helloot 02868 Brine-Winkle Bird$45 90 09 02 Tine Moth 039- 54 Cort Sonift 0993402gNot Sold Thro DeolernPrinennobjeot torhonge Anne Pence iwemcoenOrineOeenrnecminSnrt-00-Oner 1200 Otlrern 6 -3 Pottn 50oUp Add lOlL nil orders nhip9ing & inn oreto USA Con & Meo Elneonhere its 15% 25% nirl Pinteriol notnIog 0200 lienloden Prioe Lintl Pnine lint B nenrion eloire $100 nir foreign odd 0100 CLEVELAND MODEL& SUPPLY Co 18387K DRIROIT AVB CLEVELAND OHIO 44182 ytioinSerootO 5Oso 0 0 tO nn ONLY $5995 special issue have heard name before Yep guessed designer famous GOOLs talk 1949 Olathe Nats certainly elaborate accounting Ohisson engine series have ever seen under cover reference libraries Ohlsson lov er would complete copy mailing address Tim Dannel PO Box 15162n Lakewood CO 80215 believe $150 will get back issue Also additional $750 will place mailing list next six issues Money well spent good cause Four-cycle Free Flight Since began session discussion new entry-level Gas event possibility maybe also good spot launch con siderably different pigeon before close door months column thought-starter being possibility Free Flight Gas Endurance event powered neat little four bangers Past critics modern competition Free Flight bless hearts have often stated primary reason whats wrong Free Flight Gas being headlong competitiveness what needed some less-competitive events knowsome fun events such stage RC Fun Flies course therein lies insinuation competition Free Flight isnt fun counters reminding said critics about little-publicized fact RC Fun Fliers also award blasphemous trophies winners etc However shall bite lip point move right along subject hand. may should room laid-back Gas event certainly pushrod-powerplant option offers some very interesting aspects Considering engine equivalent rule formula currently use RC SAM contingent conventional engines given 40% displacement handicap direct competi tion four-cycle cousins would mean 15 two-cycle engine could replaced 21 cubic inch fourcycle 3512 4514 40/2 60/4 etc would concede probability would very romantic hang four-cycle engine business end Satellite Shocer other modern Free Flight design different type model seems likely What might guidelines such model match up engines yet correspond concept fun eventor Slow Free Flight event will Well some additional thoughts come mind resultant pleasant low-keyed sound operation engines certainly lend themselves scalelike concepts antique cabin models Thirties thereby suggesting similar configuration ROG launches slower climb-outs etc Another tempting plus potential flying gas jobs small fields much longer engine runs rather ing condemned seemingly short engine bursts currently situa tion present standard Gas events However since have always re tained personal hangup sup posed purpose RC Old-Timers much advertised opportunity fly OT Free Flight models small fields ismore clinically speakingan RC Endurance event being hidden behind mask Old-Timer movement cer tainly would venture suggest simply dump out radio gear permit new four-cycle engines SAIvI Free Flight events No offense intended OT followers aret should think new event sort affords opportunity break away regulated list approved designs OT era What might fit total purpose concept think should credited Californian Bob Oslan Bob has often made reference what calls Old Ruler event long model meets old AMA rules 1941 modeler free design build compete concept meets such parameters Basically rules clude minimum power loading 80 ounces per cubic inch engine displace ment minimum wing loading eight ounces per square foot projected area ROG requirement fuselage minimum cross-section L2/l00 L length fuselage tip prop shaft end fuselage thereby affording enough fuselage cross-section suggest beammounted cowled engines other romantic design configurations rate combo four-cycle engines model-design controls resem bling Old Ruler concept certainly thought-provoker say least Well whadayathink gang Eh What name lake Okay promise never bring subject up again See ya downwind Harry Murphy 3824 Oakwood Blvd. Anderson IN 46011 FF Old-Timers/Haught Continued page 58 Need parts Woody Bartelt Roy Johnson dba Micro Model Engineering Kirsch Municipal Airport 1301 West Lafayette Sturgis MI 49091 have just released new catalog Listed hard-to-find items such point assem blies spinners fuel tanks other parts long list ignition engines includ ing Arden Anderson Atom Atwood Baby Cyclone Bantam Bullet etc selfaddressed envelope dollar will get list purchased volumes two SAM 35 Yearbook will 146 Model Aviation DELTA PRIDE 60 SPECIFICATIONS Wing Span 58 Inches Wing Chord 14 Inches Power 60 Engine Radio 4 Channels KIT INCLUDES Full size rolled plans Easy-to-follow instructions Machine cut sanded parts Necessary hardware OLD Rt 1 Box 190 a MS 38754 Telephone 601 247-3578 happy know volume three now available publication SAM Chapter 35 England availa ble SAM Speaks 2538 N Spurgeon Street Santa Ana CA 92706 Price seven dollars postpaid A-J Interceptor As kid growing up southern Idaho didnt know what hobby shop let alone ever see source model supplies local variety store located 10 miles away town 1500 people Imagine ex citement father returned long trip bringing two A-J Intercep tors case dont remember A-J American Junior Army Interceptor catapult-launched all-balsa glider unique folding wing feature rotating wing leading edge down 900 folding two wing halves rearward very streamlined projectile could shot skyward heretofore unat tainable heights rubberband-and stick catapult Upon reaching apex its trajectory thus slowing ac ceptable airspeed wings spread rubberband power model glid ed gracefully earth What thrill Now through efforts A-J Fun Pack PO Box 548 Oregon City OR 97045 may relive days yesteryear flying own A-J Interceptor recently pleasure inspecting newly-produced models dur ing visit Clarence Bull Clarence involved producing thembut Im sure what capacity Never ask sales man leading question Im happy report quality product very high receives special attention insure proper adjustment functioning wing-fold mechanism Clarence Haught 3226 Honeysuckle Dr Coeur dAlene ID 83814 FF Indoor/Tenny Continued page 59 launch torque allowing torque set tle go Test profiles Figure 2 shows typical unwinding torque curve three values marked curve copy lower part Figure 1 Launch torque actual torque developed motor launch very critical number youre flying ceiling isnt safe ceiling-scrubbing rafter-banging given situation same model/prop rubber combo will climb almost exactly same distance time use same launch torque standard wind up Level flight torque torque model maintains same alti tude Another important torque value what call critical torque Critical torque torque level will pull model critical torque reached properly-trimmed model pitches down underpowered glide Since motor cant keep rpm up model pushes prop loses altitude rapidly Figure 3 shows flight profile alti tude vs time model doesnt touch ceiling walls Figure 4 shows typical rpm/time plot Note rpm reaches nearly constant value doesnt change unless critical torque reached Once critical torque reached rpm will change much changes meaningless since flight essen tially finished What new model built existing proven design will probably have CG good location should have good idea about rubber size re quired Really left finetune trim get right site must free major drift turbu lence Without calm air almost impossible make good measurements will want measure level flight torque cruise rpm both same time Make some short test hops low launch torque trying locate torque makes model climb slightly level out real test flights launch model about knee height launch torque makes climb no higher can reach careful avoid generating turbulence move out flight circle after launch model levels out catch measure July1985 147
Edition: Model Aviation - 1985/07
Page Numbers: 58, 146, 147
Free Flight Old- Timers Clarence Haught MASTER CRAFTSMAN Herb Wahi know has deeply involved modeling production ignition engines parts services years Since 1965 has involved no less four major engine-building projects first involved Hurleman engines made original parts combined newly-manufactured ones engines identified Herbs serial numbers markings fact Herb makes effort prevent confusion engines originals second project Anniversary Brown Jr engines limited quantity followed Wahi-Brown Jr Clas sic Custom Special Engines change pace pro duced Ohlsson Commemorative engines through period Herb also produced multitude replacement partsincluding spark plugs Herbs engines replicas clearly identifiable composite design special markings point very fussy about Hes just announced new exciting project However time will replica will continuation original production Lykens Brown Bill Brown designer Brown Junior visualized trend toward smaller engines produced 100 Lykens Browns mid Thirties 12 cubic inch dis placement engines advanced time reverse-loop-scavenged design resembling larger Brown Junior ap pearance Since Bill produced 100 original engines new ones will begin serial number 101 concept possible Bill Brown himself assisted son Dave will doing production Herb doing few functions process engine will course made original con struction methods including sand cast ings etc will distinguishable original 100 will officially known Lykens Brown Ltd Engines will shipped spark plugs purchasers will have opportunity fit original Champion V-2 plugs Herb does have Japanese / x 32 plug available well coils condensers etc engine will include booklet pre pared Bill Brown giving history interesting facts about its creation Herbs Model Motors Box 61 Forksville PA 18618 will sole distributor Write him detalls well other items including Brown Jr Hurle man engines Orders will filled order received serious may want call him 717 924-3892 Catalogs stuff Its since included section column devoted fulfilling needs infor mation help Old-Timer enthusiasts First Willamette Modelers Club Inc has few copies new Directory Northwest Area Free Flighters1985 available 21-page directory lists known Free Flighters Pacific North west includes interest areas and/or events flown may seem valuable folks Northwest provides useful contacts vacationers vendors specialized Free Flight products can get copy send ing buck Bob Stalick 5066 NW Picadilly Circle Albany OR 97321 Continued page 146 Nostalgia Gas plane Greg Davis Vancouver BC Edwin Howe-designed Big Stars 1 design published Flying Models magazine 1955 Ship powered old-style OS Max 29 Greg uses atight righthand corkscrew power pattern Bruce Augustus built line example Carl Goldberg Zipper R Power O& R 29 ignition Carl Goldberg gene now contributions Free Flight will live forever innovations include pylon wing mounts pop-up-tail dethermalizers Don Jenkins indiana p oils IN flips p rap Bunch Tiger engine Foo-to-U Pylon model 1 Crafts pink silk covering makes easy spot either air groundlbrush/treelweeds flight box made empty vegetable cans soldered together Bruce Augustus Sun Valley ID built 8-ft.span Lanzo Record Breaker R Onlookers Janet Julia Augustus 58 Model Aviation CLEVELAND GIANTSI NEW FOR GIAMTSALE BUFFS WarMs Largest Gas Plans Assaitme RNATIONALLY FAMOUS CD OUAILTE MASTER MODELS PLANS 54SDDenoinelle 21 Sd 70Connol Cot PEYSA $42 72Cor 0201/4 L&S $46 104 Con Cot PEYSA $56 62 Ronnord Bone Ike $42 96 Wright-Nonytone $48r- 77 Boeing B17G Fern $35 22 WWrnnl2I Red 1 $36 03 50 8170 Fort $25 77 W-Wnrnl2l Red L $48 6$ Dons 046A 06 $32 84 Fobber D7 Ftr 039 108 Sikor S38 Aropir $49 6$ Honnond Pete Ron 032i 60 Roe 100 SpOrt $36 72 Boylen Gee-Bee $32T 90 Boe 100 $901 $49 60 Soperrnorine S6B $24 90 Stinn Lorn Wing 056 89 Soporniorine 068 $32 80 Mortin 74 7dM-I $39 62 Corn Hoonk P-6E $42 7$ ff9ge 2400 Bonrb 542 94 CorHerln P6E Fm DUd 104 89g 0400 Ron $26 62 Loolnfreed V9 $24 60 MCfnino Clipper $55 74 Doolittlen 0-B Il $450 97 MChine Clippen 075 95 Mononeop Sport $36 68 Wentl Wfnirlnniod $32 80 Ho11 Spr Bolidog $43 68 Ryon Nonion $39 107 Aerenno C3 Spi $35 68 BBononno V ToI $29 61 Dooglo 038 Ob $32 77 Lonoonnbn Sedon $25 122 Deoglon 0-3rOb $49 73 N M rnlr Sonib $49 94 Fogen Cort Boner $45 65 MMo node B 26 $49 71 Mortin $10 Bonrb $39 8109 Monqo Rb $42 7g Tornern WW Ron 055 10009 Monqo Bomb $55 R S3 Coo 0ohk 91 1C2 $42 96 Sneo PTl7Koydet $56 r Oonhk F11C2 05499 NBOo Wdooo 901 $69 O6De8enCenretRoo534 71Doog DC3ton $22 * oonMrMollignn 035 95 200$ DC 3 T en 055 94 onnMr Molligon 545 06 Hninlnn Tenoco 13 $32 63 Boeing P26A FIr $36 108 Co 0251 4 t&S 05684 Boeing P-26A 9rr 04R 60 Doing M 2 824 69 Wooo C6 Cobin $36 68 $r ntn Bolldog Ft $30 64 Seech C17B Slog 038 29 BronortoneMnt $54 enIr C17B Stog 049 127 Oroirn teeron 909 $54 nob II Ileorro $30 73 Tronel 0000 $24 85 Look 11 Olentro 040 107 Met MO Ron $44 62 Stinnon T W SR7 016 01 Lindlne Sn tAO 311 $39 81 Stinnon TW 5R7 524 lOg Fo di PT1O T $29 122 Utinnon T W 097 038 90 Wono Toper Wiog $39 ristol FIr F2B $30 75 WentI d Lynonder $32 78 Brintol Ftr 92-B $32 100 Wont1 d Lynonder 049 118 Brintol Fe 92-B $4957 Fond Tnjnntr 4-AT$28__ 74 T-L Penno Spen 045776 Fond Trintr 4AT$45 63 Skyronbet 09591 $20114 Ford Trjntr 4-AT059 * 56 Cor Werfrb 9-40 02484 Berl-Joyoe TFJ-2$06 78 Lonk Liglrtng pg 02893 Loening C-2Arnplr$69 56 Rep Sen-Bee Ann 07458 GronnJ2-F Donk$39 74 BepSee-8 Ann9b $3978 Oronn12F Donk$56 106 Piper J-3 Cob 039 59 Gone GIV Born022 98 Look Hodnon Enib 838117 Gotfro O1V Bonn039 63 Gron 969 Helloot 02868 Brine-Winkle Bird$45 90 09 02 Tine Moth 039- 54 Cort Sonift 0993402gNot Sold Thro DeolernPrinennobjeot torhonge Anne Pence iwemcoenOrineOeenrnecminSnrt-00-Oner 1200 Otlrern 6 -3 Pottn 50oUp Add lOlL nil orders nhip9ing & inn oreto USA Con & Meo Elneonhere its 15% 25% nirl Pinteriol notnIog 0200 lienloden Prioe Lintl Pnine lint B nenrion eloire $100 nir foreign odd 0100 CLEVELAND MODEL& SUPPLY Co 18387K DRIROIT AVB CLEVELAND OHIO 44182 ytioinSerootO 5Oso 0 0 tO nn ONLY $5995 special issue have heard name before Yep guessed designer famous GOOLs talk 1949 Olathe Nats certainly elaborate accounting Ohisson engine series have ever seen under cover reference libraries Ohlsson lov er would complete copy mailing address Tim Dannel PO Box 15162n Lakewood CO 80215 believe $150 will get back issue Also additional $750 will place mailing list next six issues Money well spent good cause Four-cycle Free Flight Since began session discussion new entry-level Gas event possibility maybe also good spot launch con siderably different pigeon before close door months column thought-starter being possibility Free Flight Gas Endurance event powered neat little four bangers Past critics modern competition Free Flight bless hearts have often stated primary reason whats wrong Free Flight Gas being headlong competitiveness what needed some less-competitive events knowsome fun events such stage RC Fun Flies course therein lies insinuation competition Free Flight isnt fun counters reminding said critics about little-publicized fact RC Fun Fliers also award blasphemous trophies winners etc However shall bite lip point move right along subject hand. may should room laid-back Gas event certainly pushrod-powerplant option offers some very interesting aspects Considering engine equivalent rule formula currently use RC SAM contingent conventional engines given 40% displacement handicap direct competi tion four-cycle cousins would mean 15 two-cycle engine could replaced 21 cubic inch fourcycle 3512 4514 40/2 60/4 etc would concede probability would very romantic hang four-cycle engine business end Satellite Shocer other modern Free Flight design different type model seems likely What might guidelines such model match up engines yet correspond concept fun eventor Slow Free Flight event will Well some additional thoughts come mind resultant pleasant low-keyed sound operation engines certainly lend themselves scalelike concepts antique cabin models Thirties thereby suggesting similar configuration ROG launches slower climb-outs etc Another tempting plus potential flying gas jobs small fields much longer engine runs rather ing condemned seemingly short engine bursts currently situa tion present standard Gas events However since have always re tained personal hangup sup posed purpose RC Old-Timers much advertised opportunity fly OT Free Flight models small fields ismore clinically speakingan RC Endurance event being hidden behind mask Old-Timer movement cer tainly would venture suggest simply dump out radio gear permit new four-cycle engines SAIvI Free Flight events No offense intended OT followers aret should think new event sort affords opportunity break away regulated list approved designs OT era What might fit total purpose concept think should credited Californian Bob Oslan Bob has often made reference what calls Old Ruler event long model meets old AMA rules 1941 modeler free design build compete concept meets such parameters Basically rules clude minimum power loading 80 ounces per cubic inch engine displace ment minimum wing loading eight ounces per square foot projected area ROG requirement fuselage minimum cross-section L2/l00 L length fuselage tip prop shaft end fuselage thereby affording enough fuselage cross-section suggest beammounted cowled engines other romantic design configurations rate combo four-cycle engines model-design controls resem bling Old Ruler concept certainly thought-provoker say least Well whadayathink gang Eh What name lake Okay promise never bring subject up again See ya downwind Harry Murphy 3824 Oakwood Blvd. Anderson IN 46011 FF Old-Timers/Haught Continued page 58 Need parts Woody Bartelt Roy Johnson dba Micro Model Engineering Kirsch Municipal Airport 1301 West Lafayette Sturgis MI 49091 have just released new catalog Listed hard-to-find items such point assem blies spinners fuel tanks other parts long list ignition engines includ ing Arden Anderson Atom Atwood Baby Cyclone Bantam Bullet etc selfaddressed envelope dollar will get list purchased volumes two SAM 35 Yearbook will 146 Model Aviation DELTA PRIDE 60 SPECIFICATIONS Wing Span 58 Inches Wing Chord 14 Inches Power 60 Engine Radio 4 Channels KIT INCLUDES Full size rolled plans Easy-to-follow instructions Machine cut sanded parts Necessary hardware OLD Rt 1 Box 190 a MS 38754 Telephone 601 247-3578 happy know volume three now available publication SAM Chapter 35 England availa ble SAM Speaks 2538 N Spurgeon Street Santa Ana CA 92706 Price seven dollars postpaid A-J Interceptor As kid growing up southern Idaho didnt know what hobby shop let alone ever see source model supplies local variety store located 10 miles away town 1500 people Imagine ex citement father returned long trip bringing two A-J Intercep tors case dont remember A-J American Junior Army Interceptor catapult-launched all-balsa glider unique folding wing feature rotating wing leading edge down 900 folding two wing halves rearward very streamlined projectile could shot skyward heretofore unat tainable heights rubberband-and stick catapult Upon reaching apex its trajectory thus slowing ac ceptable airspeed wings spread rubberband power model glid ed gracefully earth What thrill Now through efforts A-J Fun Pack PO Box 548 Oregon City OR 97045 may relive days yesteryear flying own A-J Interceptor recently pleasure inspecting newly-produced models dur ing visit Clarence Bull Clarence involved producing thembut Im sure what capacity Never ask sales man leading question Im happy report quality product very high receives special attention insure proper adjustment functioning wing-fold mechanism Clarence Haught 3226 Honeysuckle Dr Coeur dAlene ID 83814 FF Indoor/Tenny Continued page 59 launch torque allowing torque set tle go Test profiles Figure 2 shows typical unwinding torque curve three values marked curve copy lower part Figure 1 Launch torque actual torque developed motor launch very critical number youre flying ceiling isnt safe ceiling-scrubbing rafter-banging given situation same model/prop rubber combo will climb almost exactly same distance time use same launch torque standard wind up Level flight torque torque model maintains same alti tude Another important torque value what call critical torque Critical torque torque level will pull model critical torque reached properly-trimmed model pitches down underpowered glide Since motor cant keep rpm up model pushes prop loses altitude rapidly Figure 3 shows flight profile alti tude vs time model doesnt touch ceiling walls Figure 4 shows typical rpm/time plot Note rpm reaches nearly constant value doesnt change unless critical torque reached Once critical torque reached rpm will change much changes meaningless since flight essen tially finished What new model built existing proven design will probably have CG good location should have good idea about rubber size re quired Really left finetune trim get right site must free major drift turbu lence Without calm air almost impossible make good measurements will want measure level flight torque cruise rpm both same time Make some short test hops low launch torque trying locate torque makes model climb slightly level out real test flights launch model about knee height launch torque makes climb no higher can reach careful avoid generating turbulence move out flight circle after launch model levels out catch measure July1985 147
Edition: Model Aviation - 1985/07
Page Numbers: 58, 146, 147
Free Flight Old- Timers Clarence Haught MASTER CRAFTSMAN Herb Wahi know has deeply involved modeling production ignition engines parts services years Since 1965 has involved no less four major engine-building projects first involved Hurleman engines made original parts combined newly-manufactured ones engines identified Herbs serial numbers markings fact Herb makes effort prevent confusion engines originals second project Anniversary Brown Jr engines limited quantity followed Wahi-Brown Jr Clas sic Custom Special Engines change pace pro duced Ohlsson Commemorative engines through period Herb also produced multitude replacement partsincluding spark plugs Herbs engines replicas clearly identifiable composite design special markings point very fussy about Hes just announced new exciting project However time will replica will continuation original production Lykens Brown Bill Brown designer Brown Junior visualized trend toward smaller engines produced 100 Lykens Browns mid Thirties 12 cubic inch dis placement engines advanced time reverse-loop-scavenged design resembling larger Brown Junior ap pearance Since Bill produced 100 original engines new ones will begin serial number 101 concept possible Bill Brown himself assisted son Dave will doing production Herb doing few functions process engine will course made original con struction methods including sand cast ings etc will distinguishable original 100 will officially known Lykens Brown Ltd Engines will shipped spark plugs purchasers will have opportunity fit original Champion V-2 plugs Herb does have Japanese / x 32 plug available well coils condensers etc engine will include booklet pre pared Bill Brown giving history interesting facts about its creation Herbs Model Motors Box 61 Forksville PA 18618 will sole distributor Write him detalls well other items including Brown Jr Hurle man engines Orders will filled order received serious may want call him 717 924-3892 Catalogs stuff Its since included section column devoted fulfilling needs infor mation help Old-Timer enthusiasts First Willamette Modelers Club Inc has few copies new Directory Northwest Area Free Flighters1985 available 21-page directory lists known Free Flighters Pacific North west includes interest areas and/or events flown may seem valuable folks Northwest provides useful contacts vacationers vendors specialized Free Flight products can get copy send ing buck Bob Stalick 5066 NW Picadilly Circle Albany OR 97321 Continued page 146 Nostalgia Gas plane Greg Davis Vancouver BC Edwin Howe-designed Big Stars 1 design published Flying Models magazine 1955 Ship powered old-style OS Max 29 Greg uses atight righthand corkscrew power pattern Bruce Augustus built line example Carl Goldberg Zipper R Power O& R 29 ignition Carl Goldberg gene now contributions Free Flight will live forever innovations include pylon wing mounts pop-up-tail dethermalizers Don Jenkins indiana p oils IN flips p rap Bunch Tiger engine Foo-to-U Pylon model 1 Crafts pink silk covering makes easy spot either air groundlbrush/treelweeds flight box made empty vegetable cans soldered together Bruce Augustus Sun Valley ID built 8-ft.span Lanzo Record Breaker R Onlookers Janet Julia Augustus 58 Model Aviation CLEVELAND GIANTSI NEW FOR GIAMTSALE BUFFS WarMs Largest Gas Plans Assaitme RNATIONALLY FAMOUS CD OUAILTE MASTER MODELS PLANS 54SDDenoinelle 21 Sd 70Connol Cot PEYSA $42 72Cor 0201/4 L&S $46 104 Con Cot PEYSA $56 62 Ronnord Bone Ike $42 96 Wright-Nonytone $48r- 77 Boeing B17G Fern $35 22 WWrnnl2I Red 1 $36 03 50 8170 Fort $25 77 W-Wnrnl2l Red L $48 6$ Dons 046A 06 $32 84 Fobber D7 Ftr 039 108 Sikor S38 Aropir $49 6$ Honnond Pete Ron 032i 60 Roe 100 SpOrt $36 72 Boylen Gee-Bee $32T 90 Boe 100 $901 $49 60 Soperrnorine S6B $24 90 Stinn Lorn Wing 056 89 Soporniorine 068 $32 80 Mortin 74 7dM-I $39 62 Corn Hoonk P-6E $42 7$ ff9ge 2400 Bonrb 542 94 CorHerln P6E Fm DUd 104 89g 0400 Ron $26 62 Loolnfreed V9 $24 60 MCfnino Clipper $55 74 Doolittlen 0-B Il $450 97 MChine Clippen 075 95 Mononeop Sport $36 68 Wentl Wfnirlnniod $32 80 Ho11 Spr Bolidog $43 68 Ryon Nonion $39 107 Aerenno C3 Spi $35 68 BBononno V ToI $29 61 Dooglo 038 Ob $32 77 Lonoonnbn Sedon $25 122 Deoglon 0-3rOb $49 73 N M rnlr Sonib $49 94 Fogen Cort Boner $45 65 MMo node B 26 $49 71 Mortin $10 Bonrb $39 8109 Monqo Rb $42 7g Tornern WW Ron 055 10009 Monqo Bomb $55 R S3 Coo 0ohk 91 1C2 $42 96 Sneo PTl7Koydet $56 r Oonhk F11C2 05499 NBOo Wdooo 901 $69 O6De8enCenretRoo534 71Doog DC3ton $22 * oonMrMollignn 035 95 200$ DC 3 T en 055 94 onnMr Molligon 545 06 Hninlnn Tenoco 13 $32 63 Boeing P26A FIr $36 108 Co 0251 4 t&S 05684 Boeing P-26A 9rr 04R 60 Doing M 2 824 69 Wooo C6 Cobin $36 68 $r ntn Bolldog Ft $30 64 Seech C17B Slog 038 29 BronortoneMnt $54 enIr C17B Stog 049 127 Oroirn teeron 909 $54 nob II Ileorro $30 73 Tronel 0000 $24 85 Look 11 Olentro 040 107 Met MO Ron $44 62 Stinnon T W SR7 016 01 Lindlne Sn tAO 311 $39 81 Stinnon TW 5R7 524 lOg Fo di PT1O T $29 122 Utinnon T W 097 038 90 Wono Toper Wiog $39 ristol FIr F2B $30 75 WentI d Lynonder $32 78 Brintol Ftr 92-B $32 100 Wont1 d Lynonder 049 118 Brintol Fe 92-B $4957 Fond Tnjnntr 4-AT$28__ 74 T-L Penno Spen 045776 Fond Trintr 4AT$45 63 Skyronbet 09591 $20114 Ford Trjntr 4-AT059 * 56 Cor Werfrb 9-40 02484 Berl-Joyoe TFJ-2$06 78 Lonk Liglrtng pg 02893 Loening C-2Arnplr$69 56 Rep Sen-Bee Ann 07458 GronnJ2-F Donk$39 74 BepSee-8 Ann9b $3978 Oronn12F Donk$56 106 Piper J-3 Cob 039 59 Gone GIV Born022 98 Look Hodnon Enib 838117 Gotfro O1V Bonn039 63 Gron 969 Helloot 02868 Brine-Winkle Bird$45 90 09 02 Tine Moth 039- 54 Cort Sonift 0993402gNot Sold Thro DeolernPrinennobjeot torhonge Anne Pence iwemcoenOrineOeenrnecminSnrt-00-Oner 1200 Otlrern 6 -3 Pottn 50oUp Add lOlL nil orders nhip9ing & inn oreto USA Con & Meo Elneonhere its 15% 25% nirl Pinteriol notnIog 0200 lienloden Prioe Lintl Pnine lint B nenrion eloire $100 nir foreign odd 0100 CLEVELAND MODEL& SUPPLY Co 18387K DRIROIT AVB CLEVELAND OHIO 44182 ytioinSerootO 5Oso 0 0 tO nn ONLY $5995 special issue have heard name before Yep guessed designer famous GOOLs talk 1949 Olathe Nats certainly elaborate accounting Ohisson engine series have ever seen under cover reference libraries Ohlsson lov er would complete copy mailing address Tim Dannel PO Box 15162n Lakewood CO 80215 believe $150 will get back issue Also additional $750 will place mailing list next six issues Money well spent good cause Four-cycle Free Flight Since began session discussion new entry-level Gas event possibility maybe also good spot launch con siderably different pigeon before close door months column thought-starter being possibility Free Flight Gas Endurance event powered neat little four bangers Past critics modern competition Free Flight bless hearts have often stated primary reason whats wrong Free Flight Gas being headlong competitiveness what needed some less-competitive events knowsome fun events such stage RC Fun Flies course therein lies insinuation competition Free Flight isnt fun counters reminding said critics about little-publicized fact RC Fun Fliers also award blasphemous trophies winners etc However shall bite lip point move right along subject hand. may should room laid-back Gas event certainly pushrod-powerplant option offers some very interesting aspects Considering engine equivalent rule formula currently use RC SAM contingent conventional engines given 40% displacement handicap direct competi tion four-cycle cousins would mean 15 two-cycle engine could replaced 21 cubic inch fourcycle 3512 4514 40/2 60/4 etc would concede probability would very romantic hang four-cycle engine business end Satellite Shocer other modern Free Flight design different type model seems likely What might guidelines such model match up engines yet correspond concept fun eventor Slow Free Flight event will Well some additional thoughts come mind resultant pleasant low-keyed sound operation engines certainly lend themselves scalelike concepts antique cabin models Thirties thereby suggesting similar configuration ROG launches slower climb-outs etc Another tempting plus potential flying gas jobs small fields much longer engine runs rather ing condemned seemingly short engine bursts currently situa tion present standard Gas events However since have always re tained personal hangup sup posed purpose RC Old-Timers much advertised opportunity fly OT Free Flight models small fields ismore clinically speakingan RC Endurance event being hidden behind mask Old-Timer movement cer tainly would venture suggest simply dump out radio gear permit new four-cycle engines SAIvI Free Flight events No offense intended OT followers aret should think new event sort affords opportunity break away regulated list approved designs OT era What might fit total purpose concept think should credited Californian Bob Oslan Bob has often made reference what calls Old Ruler event long model meets old AMA rules 1941 modeler free design build compete concept meets such parameters Basically rules clude minimum power loading 80 ounces per cubic inch engine displace ment minimum wing loading eight ounces per square foot projected area ROG requirement fuselage minimum cross-section L2/l00 L length fuselage tip prop shaft end fuselage thereby affording enough fuselage cross-section suggest beammounted cowled engines other romantic design configurations rate combo four-cycle engines model-design controls resem bling Old Ruler concept certainly thought-provoker say least Well whadayathink gang Eh What name lake Okay promise never bring subject up again See ya downwind Harry Murphy 3824 Oakwood Blvd. Anderson IN 46011 FF Old-Timers/Haught Continued page 58 Need parts Woody Bartelt Roy Johnson dba Micro Model Engineering Kirsch Municipal Airport 1301 West Lafayette Sturgis MI 49091 have just released new catalog Listed hard-to-find items such point assem blies spinners fuel tanks other parts long list ignition engines includ ing Arden Anderson Atom Atwood Baby Cyclone Bantam Bullet etc selfaddressed envelope dollar will get list purchased volumes two SAM 35 Yearbook will 146 Model Aviation DELTA PRIDE 60 SPECIFICATIONS Wing Span 58 Inches Wing Chord 14 Inches Power 60 Engine Radio 4 Channels KIT INCLUDES Full size rolled plans Easy-to-follow instructions Machine cut sanded parts Necessary hardware OLD Rt 1 Box 190 a MS 38754 Telephone 601 247-3578 happy know volume three now available publication SAM Chapter 35 England availa ble SAM Speaks 2538 N Spurgeon Street Santa Ana CA 92706 Price seven dollars postpaid A-J Interceptor As kid growing up southern Idaho didnt know what hobby shop let alone ever see source model supplies local variety store located 10 miles away town 1500 people Imagine ex citement father returned long trip bringing two A-J Intercep tors case dont remember A-J American Junior Army Interceptor catapult-launched all-balsa glider unique folding wing feature rotating wing leading edge down 900 folding two wing halves rearward very streamlined projectile could shot skyward heretofore unat tainable heights rubberband-and stick catapult Upon reaching apex its trajectory thus slowing ac ceptable airspeed wings spread rubberband power model glid ed gracefully earth What thrill Now through efforts A-J Fun Pack PO Box 548 Oregon City OR 97045 may relive days yesteryear flying own A-J Interceptor recently pleasure inspecting newly-produced models dur ing visit Clarence Bull Clarence involved producing thembut Im sure what capacity Never ask sales man leading question Im happy report quality product very high receives special attention insure proper adjustment functioning wing-fold mechanism Clarence Haught 3226 Honeysuckle Dr Coeur dAlene ID 83814 FF Indoor/Tenny Continued page 59 launch torque allowing torque set tle go Test profiles Figure 2 shows typical unwinding torque curve three values marked curve copy lower part Figure 1 Launch torque actual torque developed motor launch very critical number youre flying ceiling isnt safe ceiling-scrubbing rafter-banging given situation same model/prop rubber combo will climb almost exactly same distance time use same launch torque standard wind up Level flight torque torque model maintains same alti tude Another important torque value what call critical torque Critical torque torque level will pull model critical torque reached properly-trimmed model pitches down underpowered glide Since motor cant keep rpm up model pushes prop loses altitude rapidly Figure 3 shows flight profile alti tude vs time model doesnt touch ceiling walls Figure 4 shows typical rpm/time plot Note rpm reaches nearly constant value doesnt change unless critical torque reached Once critical torque reached rpm will change much changes meaningless since flight essen tially finished What new model built existing proven design will probably have CG good location should have good idea about rubber size re quired Really left finetune trim get right site must free major drift turbu lence Without calm air almost impossible make good measurements will want measure level flight torque cruise rpm both same time Make some short test hops low launch torque trying locate torque makes model climb slightly level out real test flights launch model about knee height launch torque makes climb no higher can reach careful avoid generating turbulence move out flight circle after launch model levels out catch measure July1985 147