Free Flight. Du ration Bob Meu ser OLD-TIMER Month After pre senting two old-timer helicopter models both hold current national AMA records couldnt resist bringing latest thing old-timer hand-launch glid ers Thermic 18 also holds several current national records Between mid-fifties midsixties youngster name Curt Stevens developed timeless Thermic formidable competition machine both indoor outdoor competition During period 1955 1963 Curt co-conspirators took four Nats firsts two seconds least nine na tional AMA records among other things After first taste bloodfourth place 1953 Plymouth Internationals Curt never placed lower second place contest never beaten twice same person Since Curts retirement competi tion about 1965 nothing much has seen heard greatly-modified Thermic glider fact no pass ably accurate drawings model ever published passed around might have little something Meanwhile Curt took unto him self wife begat couple man-kids became normal course events teenagers came pass Nats having nothing better roosted spell Southern California 1977 phenomenon did escape notice Stevens family During official Nats competition clan Stevens did rather well Indoor HLG competition Darryl got first Junior two-flight score 1078 seconds Gary took second place Senior 1190 seconds merely warm-up enthusiastic indulgence event director Bill Vanderbeek help photographer kept shooting off flashbulbs faces keep awake Darryl Gary until midnight results Junior Category II record 1034 sec exceeds Cat III record would have second Bill Blanchards score Open during official competition Senior Cat II record 1526 sec would have topped best ficial Nats score some 14 seconds beat existing Cat III score topped Open Cat II record some 10 seconds boot bad couple Vic Cuiinyjnhams scc1d2Et2 850 K iJi~ 1 -Ikids never flown Indoor HLG except three meets Chicago some years earlier until very day Darryl also holds current outdoor record pod-and-boom fuselage pure Thermic quite likely influenced highly successful Joe Hervat gliders thirties major influences modifications tuning came Oakland Cloud Dusters top bananas HLG early fifties Rob bers Bilgri Foster Rambo Andrade Cole Lenderman Foote Pete Mike Demos Joe Foster spent lot time teaching Curt adjust glider before throwing accuracy models built plate glass surfaces rudders com pletely finished before cutting loose larger sheet wood stab ilizer mount trimmed zero incidence angle after wing fuselage finished assembled aged Jigs used ensure getting proper dihedral angles Joints made cyanoacrylate adhesiveEastman 910 Hot Stuffand skin built-up over joint using Hobby Shacks Quick Tack glue Since Stevens Sal Taibi once partners Competition Models seems unlikely Stevenses make second-grade balsa drawing made Curt measurements actual models might well serve standard textbook moderate-ceiling Indoor HLG Its Nothing new its rattling around Curts head 20 years Confusion Chart especially interest ing says low ceilings needs light gliders bit undercamber everybody knows presents Curts best guesses proper com binations example says flying design 84-ft site can keep weight down 04 oz about 11 grams dont need cant profit undercamber 40 Model Aviation 36 Tom Hutchinsons 1/2A Maverick received coveted Model Year Awards trom National Free Flight Society De luxe kit available RM Enterprises Albany Oregon GI LEv-K C 0 AT RICH ANGLES OF ATTACK 812 050 THICK AT 3 % OTINAL IIRAWIN AVAILABLE STAB SECTIONFOR $150 POSTPAI NFFS 100rPOTENTSAS 1 0 DARRYLS 53 OZ 90 CE SLING GARYS .jl OZ BEST FE 119 \IRDICATES005 010 QLS 00 354045555 - _____ GNFUSIOILXHART BUILT STRAIGHT AS POSSIBLE NOWASHOUT NOWASHIN NOTILT NOOFFSET050 FLYS OK CLIMBS WITH 3/4 TUENTO THE BIGHT VERY STEEP ASGLU NO ROLL OUT RECOVERY IS BY WAY OF SW SLIP TO THE RIGHT SIDE WITHIN 105 INCHES OF THE CEILING GLIDES LEFT ALL GIMI FROM AOU SUL Aj5CC L3ALA 005 400041300 cn CD005005 ____________________01 950DM REQUIRES BIN OF 100 FT DIA GLIDE CIRCLE020 -FOR ECENT FLIGHT TIllER 2300 FT IS BETTER CD SECTIONALL 00 SETTINGS 0__--\ -1 UNNAMED GLIDER FOR 77 HATS -- T59%TOSRTWIT740GARY STEVENS CAT II SR RECORD AT ATS ___________DARRYL STEVENS CAT II Ill RECORD AT 77 HATS -a require near-perfect launches achieve potentially increased flight duration Given hazards Nats competition Curt opted conservative design record setting models no finish other smooth sandingcouldnt af ford weight given druthers Curt would have opted glassy-smooth finish Although Stevenses started out about dozen models close encounters worst kind lamp hangars rafters dwindled down about record-setting models appearance having spent tough winter closet full moths So whats future Cat II scores like Cat III records would seem like cinch possibility Darryl Gary ever getting access Cat III site Nil Besides hot RC gliders nowadays Too bad sort of.. Full-size prints Stevenss original drawing published half size available $150 postpaid NFFS Plans Publications c/o Jack Brown 20267 Northbrook Sq Cupertino CA 95014 Ten Models Year Due circum stances beyond control gives especially great pleasure announce Ten Models Year selected National Free Flight Society 1978 International Classes FlANordic Andres Lepp USSR AL-29 FlBWakefield Kim Dong Sik N Korean team FlCPower Thomas Koster Den mark Speed Cream weight up around 05 oz 14 grams tamed lighter low-undercamber AMA/Outdoor Classes model might profit about 080 combinations Large Power Models Ed Bellinger undercamber course applies Curt also says better times could GYSOB particular design larger smaller made using longer nose tail- Small Power Models Tom Hutchinson models results would differ Curt boom lengths smaller stab Maverick states though best times will ob- model wouldnt stable would Rubber Power George Perryman Great Speckled Bird Special wards Bob Meuser No Non-Cents Pennyplane trade Flying Aces Club Bridgeport Conn Peanut Scale event Indoor Jim Richmond Cat Walker Stan Mike Stoy Coot handlaunch glider Stories about models drawings will appear Report Eleventh Annual NFFS Symposium will frantically published just hairs breadth ahead Nats according custom logistics permit award recipients will give speil models NFFS Sympo takes place Nats Scorcher 850 Vic Cunnyngham Jrs latest biggie classes B C D replaces Copy Cat 900 took __________at least first place major conTable Rubber Motor TurnsContinued page 98 42 Model Aviation Portrait serious HI gliderman Young Gary Stevens brother Darryl set three impressive records last Nats Oldtimers still talk about dad Curt holy terror 1 955-65 decade Like him fly highly developed derivative Thermic 18 STRANDSTURNS PER INCH 25055606570758085 4353389424460495530566601 6289318346375404433462491 8250275300325350375400425 10224246268291313335358380 12204224245265286306327347 14189208227246265283302321 16177194212230247265283301 18167183200217233250267283 20158174190206221237253269 22151166181196211226241256 24144159173188200217231245 $100PmnutNo 7 Curt. XF6C-6 Capt Pages MODERNISTIC MODELS PO BOX 6974 ALBUQ NM 87197 nice have plug fast lasts icing cake fact engine would run very rich dying Ive discouraged some brands plugs Id considered going diesels well maybe just ignition engines Something else really works Brasher/McFadden fuel regulator babies hard come Norm fixed motors installed same time Rather half turn adjust ment needle have about five turns plane holds its speed through turns much better because engine isnt dropping off lean insides slightly rich outsides regulator sometimes available Norm Duke Fox has experimented may possible make avail able commercially motors exactly 10 inches long would 70 turns per inch table go across 2 Number Strands column 70 Turns per inch columns go down 70 column until opposite 16 Strands column read off 247 turns per inch Multiply 42the length motors beand get 1037 turns table based notion turns-per-inch inversely proportional square root cross-sectional area relationship easy come ignore details what happens inside squirrely mess wound-up rub ber seems match exper iments proof pudding first published thirties J P Glass writing Zaics yearbooks appeared also later editions Charles Hampson Grants ModelAirplane Design ran some rather careful tests few years back covering wide range variables confirmed relationship within percent two hold number strands rather merely total cross-section has effect 28 strands Y8 rubber acts differently 14 strands / might true personal opinion effect small under normal circumstances effect small because motors sufficiently well lubricated Rebuttle Blue Ridge Models Alive Well unfortunates wait over four months receive order grumble no Blue Ridge back normal unexpected volume orders delayed shipment balsa move new house put Blue Ridge little behind Phil Shirley Hartman Charlie Johnson 3716 Ingraham St San Diego CA 92109 FF Duration/Mouser continued page 42 test series entered except Nats took second After ten years competi tion flying including thousands flights Copy Cat splattered itself against asphalt Buckeye Arizona last year after Vic added auto surfaces attempt improve its performance Scorcher has higher aspect ratio longer tail mo ment arm smaller 30% horizontal tail FAT-ish might say no auto-tail Other changes primarily cosmetic Construction typical of Vics models have featured Flying Models Rubber Motor Turns Tables giving motor turns various numbers strands motor lengths pop-up literature time time similar presented has published last decade two must have missed tables apply specific kind rubber ap plies kinds works Example just received new batch /4 rubber plan make up 16strand motors 42 inches long wonder turns should expect out such motor could simply make up few such motors test de struction such motors now cost ing $2 might like try alternative Make up two three twostrand motors say 10 inches long break test wind destruction Say break about 700 turns 98 Model Aviation OVER EEO978 CAA 000 SCALE DRAWN Ssoc MORR SON ECH 48500 M KENZ E HWYV IJA OR 9 488 Darryl Stevens demonstrates approved helicopter launching technique Model holds two records does about 4 mm dead air 600 turns four strands rubber youd like explore fringes outer space drawing appeared April issue Curt Stevens pic Blue Ridge Models what used spare time have already sold around 500 fine Coupe dHiver kit find rather amazing considering kit expensive advertising largely word mouth kit sold direct mail estimate num ber competition-oriented Coupe fliers country Id have come conclusion already has two Blue Ridge Coupes Free flight apparently much larger what meets eye still big enough entice Big Boys business market kits some not-all-that-popular competition events Meanwhile fortunate being able obtain high quality kits cottageindustry outfits such Blue Ridge handful others have mentioned time time overlooked Blue Ridges Coupe props rib sets sold separately kits its kits handlaunch gliders sport P-30 models vast assortment free-flight good ies catalog send SASE Blue Ridge Models PO Box 429 Skyland NC 28776 Tell Bob sent receive DT rubberband absolutely free X-Acto Knife Fix Have trouble unleashing blade pet X-Acto knife after cinching tight tough job Try wrap Teflon tape-dope around collet stuff slippery stretchy conforms anything intended sealing pipe threads available plumbing section hardware stores Make Friends influence Free Flighters People Everybody Else decide write total stranger ask him about model someone name appeared magazine contest results listing Since yet first-name basis start out Dear Sir better Dear Mr Smith Cautious formal restrained feeling uncomfort able formality sign letter simply Al being sure put full name address top course Chances reply will come back Dear Al old buddies stantly works Outstanding Performance National Records getting official AMA National Records ever b Senior c month d day record-records would have go C Keith Martin Keiths dad Charlie Martin Bellevue Washing ton must have picked up few pointers along way wound up team representing USA 1977 FAI World Champs As Junior Keith picked up nine re cords during 1971 As Senior during period March 1972 through December 1975 picked up additional 69 re cords grand total 78 During month December 1975 gathered 24 things 27th month set two records three door ceiling-height categories two Outdoor categories record one-day total eight logistics boggle mind Keiths Indoor records set Autogiro Ornithopter Helicopter events easy ones Easy . Ok kiddo lets see six-minutes-plus autogiro Outdoor records slice cross section through Power Rubber Rocket events Can top Keith estab lished nine records Junior surely someone must have topped Linda Randolph Marty Thompson Lets hear about eh Bob Meuser 4200 Gregory St Oak land CA 94619 FF Old Timers/Haught continued page 43 satisfaction Imagine thrill flying own engine Get Straight Im often asked measure wing stabilizer incidence angles particularly undercambered wing sections modelers real ize undercambered wings treated same flat-bottomed cousins straightedge placed across leading trailing edge becomes reference line following excerpt Flight Plug monthly newsletter Southern California Ignition Flyers provides good technique measuring incidence Next checking warps important aspect rigging new ship re-rigging old determining and/or setting incidence thrust angles some huge ships can sticky operation Heres trick try wheels bench prop up tail books until stab platform level Use line levels size fat hexagon pencil about 3 inches long OK stab zero Now lay level along wing mount positioned its base overhangs outer edge mount just bit Place straight piece cardboard against base level Keeping front level against wing mount carefully raise rear level using cardboard until bubble centers Now put pencil mark cardboard indicate much raised center bubble Draw straight line mark point cardboard under front level Measure line protrac tor against base cardboard thats wing incidence Use same technique checking pitch motor mounts Troubleshooting times old engine just doesnt want cooperate Invariably occurs inop portune moment just before official flight example Most us grab screwdriver begin checking wiring shorts opens cold-solder joints time honored arcing test cur rent better way suggested Don Jenkins Indianapolis Don writes have found 3-volt bulb wires soldered contacts makes very good inexpensive test light will also give pretty good September1978 99 course could hasten process starting out Dear Fred first place reply comes back Dear Mr Jones trouble Formality has its place guess seems best reserved use people mad at
Edition: Model Aviation - 1978/09
Page Numbers: 40, 41, 42, 98, 99
Free Flight. Du ration Bob Meu ser OLD-TIMER Month After pre senting two old-timer helicopter models both hold current national AMA records couldnt resist bringing latest thing old-timer hand-launch glid ers Thermic 18 also holds several current national records Between mid-fifties midsixties youngster name Curt Stevens developed timeless Thermic formidable competition machine both indoor outdoor competition During period 1955 1963 Curt co-conspirators took four Nats firsts two seconds least nine na tional AMA records among other things After first taste bloodfourth place 1953 Plymouth Internationals Curt never placed lower second place contest never beaten twice same person Since Curts retirement competi tion about 1965 nothing much has seen heard greatly-modified Thermic glider fact no pass ably accurate drawings model ever published passed around might have little something Meanwhile Curt took unto him self wife begat couple man-kids became normal course events teenagers came pass Nats having nothing better roosted spell Southern California 1977 phenomenon did escape notice Stevens family During official Nats competition clan Stevens did rather well Indoor HLG competition Darryl got first Junior two-flight score 1078 seconds Gary took second place Senior 1190 seconds merely warm-up enthusiastic indulgence event director Bill Vanderbeek help photographer kept shooting off flashbulbs faces keep awake Darryl Gary until midnight results Junior Category II record 1034 sec exceeds Cat III record would have second Bill Blanchards score Open during official competition Senior Cat II record 1526 sec would have topped best ficial Nats score some 14 seconds beat existing Cat III score topped Open Cat II record some 10 seconds boot bad couple Vic Cuiinyjnhams scc1d2Et2 850 K iJi~ 1 -Ikids never flown Indoor HLG except three meets Chicago some years earlier until very day Darryl also holds current outdoor record pod-and-boom fuselage pure Thermic quite likely influenced highly successful Joe Hervat gliders thirties major influences modifications tuning came Oakland Cloud Dusters top bananas HLG early fifties Rob bers Bilgri Foster Rambo Andrade Cole Lenderman Foote Pete Mike Demos Joe Foster spent lot time teaching Curt adjust glider before throwing accuracy models built plate glass surfaces rudders com pletely finished before cutting loose larger sheet wood stab ilizer mount trimmed zero incidence angle after wing fuselage finished assembled aged Jigs used ensure getting proper dihedral angles Joints made cyanoacrylate adhesiveEastman 910 Hot Stuffand skin built-up over joint using Hobby Shacks Quick Tack glue Since Stevens Sal Taibi once partners Competition Models seems unlikely Stevenses make second-grade balsa drawing made Curt measurements actual models might well serve standard textbook moderate-ceiling Indoor HLG Its Nothing new its rattling around Curts head 20 years Confusion Chart especially interest ing says low ceilings needs light gliders bit undercamber everybody knows presents Curts best guesses proper com binations example says flying design 84-ft site can keep weight down 04 oz about 11 grams dont need cant profit undercamber 40 Model Aviation 36 Tom Hutchinsons 1/2A Maverick received coveted Model Year Awards trom National Free Flight Society De luxe kit available RM Enterprises Albany Oregon GI LEv-K C 0 AT RICH ANGLES OF ATTACK 812 050 THICK AT 3 % OTINAL IIRAWIN AVAILABLE STAB SECTIONFOR $150 POSTPAI NFFS 100rPOTENTSAS 1 0 DARRYLS 53 OZ 90 CE SLING GARYS .jl OZ BEST FE 119 \IRDICATES005 010 QLS 00 354045555 - _____ GNFUSIOILXHART BUILT STRAIGHT AS POSSIBLE NOWASHOUT NOWASHIN NOTILT NOOFFSET050 FLYS OK CLIMBS WITH 3/4 TUENTO THE BIGHT VERY STEEP ASGLU NO ROLL OUT RECOVERY IS BY WAY OF SW SLIP TO THE RIGHT SIDE WITHIN 105 INCHES OF THE CEILING GLIDES LEFT ALL GIMI FROM AOU SUL Aj5CC L3ALA 005 400041300 cn CD005005 ____________________01 950DM REQUIRES BIN OF 100 FT DIA GLIDE CIRCLE020 -FOR ECENT FLIGHT TIllER 2300 FT IS BETTER CD SECTIONALL 00 SETTINGS 0__--\ -1 UNNAMED GLIDER FOR 77 HATS -- T59%TOSRTWIT740GARY STEVENS CAT II SR RECORD AT ATS ___________DARRYL STEVENS CAT II Ill RECORD AT 77 HATS -a require near-perfect launches achieve potentially increased flight duration Given hazards Nats competition Curt opted conservative design record setting models no finish other smooth sandingcouldnt af ford weight given druthers Curt would have opted glassy-smooth finish Although Stevenses started out about dozen models close encounters worst kind lamp hangars rafters dwindled down about record-setting models appearance having spent tough winter closet full moths So whats future Cat II scores like Cat III records would seem like cinch possibility Darryl Gary ever getting access Cat III site Nil Besides hot RC gliders nowadays Too bad sort of.. Full-size prints Stevenss original drawing published half size available $150 postpaid NFFS Plans Publications c/o Jack Brown 20267 Northbrook Sq Cupertino CA 95014 Ten Models Year Due circum stances beyond control gives especially great pleasure announce Ten Models Year selected National Free Flight Society 1978 International Classes FlANordic Andres Lepp USSR AL-29 FlBWakefield Kim Dong Sik N Korean team FlCPower Thomas Koster Den mark Speed Cream weight up around 05 oz 14 grams tamed lighter low-undercamber AMA/Outdoor Classes model might profit about 080 combinations Large Power Models Ed Bellinger undercamber course applies Curt also says better times could GYSOB particular design larger smaller made using longer nose tail- Small Power Models Tom Hutchinson models results would differ Curt boom lengths smaller stab Maverick states though best times will ob- model wouldnt stable would Rubber Power George Perryman Great Speckled Bird Special wards Bob Meuser No Non-Cents Pennyplane trade Flying Aces Club Bridgeport Conn Peanut Scale event Indoor Jim Richmond Cat Walker Stan Mike Stoy Coot handlaunch glider Stories about models drawings will appear Report Eleventh Annual NFFS Symposium will frantically published just hairs breadth ahead Nats according custom logistics permit award recipients will give speil models NFFS Sympo takes place Nats Scorcher 850 Vic Cunnyngham Jrs latest biggie classes B C D replaces Copy Cat 900 took __________at least first place major conTable Rubber Motor TurnsContinued page 98 42 Model Aviation Portrait serious HI gliderman Young Gary Stevens brother Darryl set three impressive records last Nats Oldtimers still talk about dad Curt holy terror 1 955-65 decade Like him fly highly developed derivative Thermic 18 STRANDSTURNS PER INCH 25055606570758085 4353389424460495530566601 6289318346375404433462491 8250275300325350375400425 10224246268291313335358380 12204224245265286306327347 14189208227246265283302321 16177194212230247265283301 18167183200217233250267283 20158174190206221237253269 22151166181196211226241256 24144159173188200217231245 $100PmnutNo 7 Curt. XF6C-6 Capt Pages MODERNISTIC MODELS PO BOX 6974 ALBUQ NM 87197 nice have plug fast lasts icing cake fact engine would run very rich dying Ive discouraged some brands plugs Id considered going diesels well maybe just ignition engines Something else really works Brasher/McFadden fuel regulator babies hard come Norm fixed motors installed same time Rather half turn adjust ment needle have about five turns plane holds its speed through turns much better because engine isnt dropping off lean insides slightly rich outsides regulator sometimes available Norm Duke Fox has experimented may possible make avail able commercially motors exactly 10 inches long would 70 turns per inch table go across 2 Number Strands column 70 Turns per inch columns go down 70 column until opposite 16 Strands column read off 247 turns per inch Multiply 42the length motors beand get 1037 turns table based notion turns-per-inch inversely proportional square root cross-sectional area relationship easy come ignore details what happens inside squirrely mess wound-up rub ber seems match exper iments proof pudding first published thirties J P Glass writing Zaics yearbooks appeared also later editions Charles Hampson Grants ModelAirplane Design ran some rather careful tests few years back covering wide range variables confirmed relationship within percent two hold number strands rather merely total cross-section has effect 28 strands Y8 rubber acts differently 14 strands / might true personal opinion effect small under normal circumstances effect small because motors sufficiently well lubricated Rebuttle Blue Ridge Models Alive Well unfortunates wait over four months receive order grumble no Blue Ridge back normal unexpected volume orders delayed shipment balsa move new house put Blue Ridge little behind Phil Shirley Hartman Charlie Johnson 3716 Ingraham St San Diego CA 92109 FF Duration/Mouser continued page 42 test series entered except Nats took second After ten years competi tion flying including thousands flights Copy Cat splattered itself against asphalt Buckeye Arizona last year after Vic added auto surfaces attempt improve its performance Scorcher has higher aspect ratio longer tail mo ment arm smaller 30% horizontal tail FAT-ish might say no auto-tail Other changes primarily cosmetic Construction typical of Vics models have featured Flying Models Rubber Motor Turns Tables giving motor turns various numbers strands motor lengths pop-up literature time time similar presented has published last decade two must have missed tables apply specific kind rubber ap plies kinds works Example just received new batch /4 rubber plan make up 16strand motors 42 inches long wonder turns should expect out such motor could simply make up few such motors test de struction such motors now cost ing $2 might like try alternative Make up two three twostrand motors say 10 inches long break test wind destruction Say break about 700 turns 98 Model Aviation OVER EEO978 CAA 000 SCALE DRAWN Ssoc MORR SON ECH 48500 M KENZ E HWYV IJA OR 9 488 Darryl Stevens demonstrates approved helicopter launching technique Model holds two records does about 4 mm dead air 600 turns four strands rubber youd like explore fringes outer space drawing appeared April issue Curt Stevens pic Blue Ridge Models what used spare time have already sold around 500 fine Coupe dHiver kit find rather amazing considering kit expensive advertising largely word mouth kit sold direct mail estimate num ber competition-oriented Coupe fliers country Id have come conclusion already has two Blue Ridge Coupes Free flight apparently much larger what meets eye still big enough entice Big Boys business market kits some not-all-that-popular competition events Meanwhile fortunate being able obtain high quality kits cottageindustry outfits such Blue Ridge handful others have mentioned time time overlooked Blue Ridges Coupe props rib sets sold separately kits its kits handlaunch gliders sport P-30 models vast assortment free-flight good ies catalog send SASE Blue Ridge Models PO Box 429 Skyland NC 28776 Tell Bob sent receive DT rubberband absolutely free X-Acto Knife Fix Have trouble unleashing blade pet X-Acto knife after cinching tight tough job Try wrap Teflon tape-dope around collet stuff slippery stretchy conforms anything intended sealing pipe threads available plumbing section hardware stores Make Friends influence Free Flighters People Everybody Else decide write total stranger ask him about model someone name appeared magazine contest results listing Since yet first-name basis start out Dear Sir better Dear Mr Smith Cautious formal restrained feeling uncomfort able formality sign letter simply Al being sure put full name address top course Chances reply will come back Dear Al old buddies stantly works Outstanding Performance National Records getting official AMA National Records ever b Senior c month d day record-records would have go C Keith Martin Keiths dad Charlie Martin Bellevue Washing ton must have picked up few pointers along way wound up team representing USA 1977 FAI World Champs As Junior Keith picked up nine re cords during 1971 As Senior during period March 1972 through December 1975 picked up additional 69 re cords grand total 78 During month December 1975 gathered 24 things 27th month set two records three door ceiling-height categories two Outdoor categories record one-day total eight logistics boggle mind Keiths Indoor records set Autogiro Ornithopter Helicopter events easy ones Easy . Ok kiddo lets see six-minutes-plus autogiro Outdoor records slice cross section through Power Rubber Rocket events Can top Keith estab lished nine records Junior surely someone must have topped Linda Randolph Marty Thompson Lets hear about eh Bob Meuser 4200 Gregory St Oak land CA 94619 FF Old Timers/Haught continued page 43 satisfaction Imagine thrill flying own engine Get Straight Im often asked measure wing stabilizer incidence angles particularly undercambered wing sections modelers real ize undercambered wings treated same flat-bottomed cousins straightedge placed across leading trailing edge becomes reference line following excerpt Flight Plug monthly newsletter Southern California Ignition Flyers provides good technique measuring incidence Next checking warps important aspect rigging new ship re-rigging old determining and/or setting incidence thrust angles some huge ships can sticky operation Heres trick try wheels bench prop up tail books until stab platform level Use line levels size fat hexagon pencil about 3 inches long OK stab zero Now lay level along wing mount positioned its base overhangs outer edge mount just bit Place straight piece cardboard against base level Keeping front level against wing mount carefully raise rear level using cardboard until bubble centers Now put pencil mark cardboard indicate much raised center bubble Draw straight line mark point cardboard under front level Measure line protrac tor against base cardboard thats wing incidence Use same technique checking pitch motor mounts Troubleshooting times old engine just doesnt want cooperate Invariably occurs inop portune moment just before official flight example Most us grab screwdriver begin checking wiring shorts opens cold-solder joints time honored arcing test cur rent better way suggested Don Jenkins Indianapolis Don writes have found 3-volt bulb wires soldered contacts makes very good inexpensive test light will also give pretty good September1978 99 course could hasten process starting out Dear Fred first place reply comes back Dear Mr Jones trouble Formality has its place guess seems best reserved use people mad at
Edition: Model Aviation - 1978/09
Page Numbers: 40, 41, 42, 98, 99
Free Flight. Du ration Bob Meu ser OLD-TIMER Month After pre senting two old-timer helicopter models both hold current national AMA records couldnt resist bringing latest thing old-timer hand-launch glid ers Thermic 18 also holds several current national records Between mid-fifties midsixties youngster name Curt Stevens developed timeless Thermic formidable competition machine both indoor outdoor competition During period 1955 1963 Curt co-conspirators took four Nats firsts two seconds least nine na tional AMA records among other things After first taste bloodfourth place 1953 Plymouth Internationals Curt never placed lower second place contest never beaten twice same person Since Curts retirement competi tion about 1965 nothing much has seen heard greatly-modified Thermic glider fact no pass ably accurate drawings model ever published passed around might have little something Meanwhile Curt took unto him self wife begat couple man-kids became normal course events teenagers came pass Nats having nothing better roosted spell Southern California 1977 phenomenon did escape notice Stevens family During official Nats competition clan Stevens did rather well Indoor HLG competition Darryl got first Junior two-flight score 1078 seconds Gary took second place Senior 1190 seconds merely warm-up enthusiastic indulgence event director Bill Vanderbeek help photographer kept shooting off flashbulbs faces keep awake Darryl Gary until midnight results Junior Category II record 1034 sec exceeds Cat III record would have second Bill Blanchards score Open during official competition Senior Cat II record 1526 sec would have topped best ficial Nats score some 14 seconds beat existing Cat III score topped Open Cat II record some 10 seconds boot bad couple Vic Cuiinyjnhams scc1d2Et2 850 K iJi~ 1 -Ikids never flown Indoor HLG except three meets Chicago some years earlier until very day Darryl also holds current outdoor record pod-and-boom fuselage pure Thermic quite likely influenced highly successful Joe Hervat gliders thirties major influences modifications tuning came Oakland Cloud Dusters top bananas HLG early fifties Rob bers Bilgri Foster Rambo Andrade Cole Lenderman Foote Pete Mike Demos Joe Foster spent lot time teaching Curt adjust glider before throwing accuracy models built plate glass surfaces rudders com pletely finished before cutting loose larger sheet wood stab ilizer mount trimmed zero incidence angle after wing fuselage finished assembled aged Jigs used ensure getting proper dihedral angles Joints made cyanoacrylate adhesiveEastman 910 Hot Stuffand skin built-up over joint using Hobby Shacks Quick Tack glue Since Stevens Sal Taibi once partners Competition Models seems unlikely Stevenses make second-grade balsa drawing made Curt measurements actual models might well serve standard textbook moderate-ceiling Indoor HLG Its Nothing new its rattling around Curts head 20 years Confusion Chart especially interest ing says low ceilings needs light gliders bit undercamber everybody knows presents Curts best guesses proper com binations example says flying design 84-ft site can keep weight down 04 oz about 11 grams dont need cant profit undercamber 40 Model Aviation 36 Tom Hutchinsons 1/2A Maverick received coveted Model Year Awards trom National Free Flight Society De luxe kit available RM Enterprises Albany Oregon GI LEv-K C 0 AT RICH ANGLES OF ATTACK 812 050 THICK AT 3 % OTINAL IIRAWIN AVAILABLE STAB SECTIONFOR $150 POSTPAI NFFS 100rPOTENTSAS 1 0 DARRYLS 53 OZ 90 CE SLING GARYS .jl OZ BEST FE 119 \IRDICATES005 010 QLS 00 354045555 - _____ GNFUSIOILXHART BUILT STRAIGHT AS POSSIBLE NOWASHOUT NOWASHIN NOTILT NOOFFSET050 FLYS OK CLIMBS WITH 3/4 TUENTO THE BIGHT VERY STEEP ASGLU NO ROLL OUT RECOVERY IS BY WAY OF SW SLIP TO THE RIGHT SIDE WITHIN 105 INCHES OF THE CEILING GLIDES LEFT ALL GIMI FROM AOU SUL Aj5CC L3ALA 005 400041300 cn CD005005 ____________________01 950DM REQUIRES BIN OF 100 FT DIA GLIDE CIRCLE020 -FOR ECENT FLIGHT TIllER 2300 FT IS BETTER CD SECTIONALL 00 SETTINGS 0__--\ -1 UNNAMED GLIDER FOR 77 HATS -- T59%TOSRTWIT740GARY STEVENS CAT II SR RECORD AT ATS ___________DARRYL STEVENS CAT II Ill RECORD AT 77 HATS -a require near-perfect launches achieve potentially increased flight duration Given hazards Nats competition Curt opted conservative design record setting models no finish other smooth sandingcouldnt af ford weight given druthers Curt would have opted glassy-smooth finish Although Stevenses started out about dozen models close encounters worst kind lamp hangars rafters dwindled down about record-setting models appearance having spent tough winter closet full moths So whats future Cat II scores like Cat III records would seem like cinch possibility Darryl Gary ever getting access Cat III site Nil Besides hot RC gliders nowadays Too bad sort of.. Full-size prints Stevenss original drawing published half size available $150 postpaid NFFS Plans Publications c/o Jack Brown 20267 Northbrook Sq Cupertino CA 95014 Ten Models Year Due circum stances beyond control gives especially great pleasure announce Ten Models Year selected National Free Flight Society 1978 International Classes FlANordic Andres Lepp USSR AL-29 FlBWakefield Kim Dong Sik N Korean team FlCPower Thomas Koster Den mark Speed Cream weight up around 05 oz 14 grams tamed lighter low-undercamber AMA/Outdoor Classes model might profit about 080 combinations Large Power Models Ed Bellinger undercamber course applies Curt also says better times could GYSOB particular design larger smaller made using longer nose tail- Small Power Models Tom Hutchinson models results would differ Curt boom lengths smaller stab Maverick states though best times will ob- model wouldnt stable would Rubber Power George Perryman Great Speckled Bird Special wards Bob Meuser No Non-Cents Pennyplane trade Flying Aces Club Bridgeport Conn Peanut Scale event Indoor Jim Richmond Cat Walker Stan Mike Stoy Coot handlaunch glider Stories about models drawings will appear Report Eleventh Annual NFFS Symposium will frantically published just hairs breadth ahead Nats according custom logistics permit award recipients will give speil models NFFS Sympo takes place Nats Scorcher 850 Vic Cunnyngham Jrs latest biggie classes B C D replaces Copy Cat 900 took __________at least first place major conTable Rubber Motor TurnsContinued page 98 42 Model Aviation Portrait serious HI gliderman Young Gary Stevens brother Darryl set three impressive records last Nats Oldtimers still talk about dad Curt holy terror 1 955-65 decade Like him fly highly developed derivative Thermic 18 STRANDSTURNS PER INCH 25055606570758085 4353389424460495530566601 6289318346375404433462491 8250275300325350375400425 10224246268291313335358380 12204224245265286306327347 14189208227246265283302321 16177194212230247265283301 18167183200217233250267283 20158174190206221237253269 22151166181196211226241256 24144159173188200217231245 $100PmnutNo 7 Curt. XF6C-6 Capt Pages MODERNISTIC MODELS PO BOX 6974 ALBUQ NM 87197 nice have plug fast lasts icing cake fact engine would run very rich dying Ive discouraged some brands plugs Id considered going diesels well maybe just ignition engines Something else really works Brasher/McFadden fuel regulator babies hard come Norm fixed motors installed same time Rather half turn adjust ment needle have about five turns plane holds its speed through turns much better because engine isnt dropping off lean insides slightly rich outsides regulator sometimes available Norm Duke Fox has experimented may possible make avail able commercially motors exactly 10 inches long would 70 turns per inch table go across 2 Number Strands column 70 Turns per inch columns go down 70 column until opposite 16 Strands column read off 247 turns per inch Multiply 42the length motors beand get 1037 turns table based notion turns-per-inch inversely proportional square root cross-sectional area relationship easy come ignore details what happens inside squirrely mess wound-up rub ber seems match exper iments proof pudding first published thirties J P Glass writing Zaics yearbooks appeared also later editions Charles Hampson Grants ModelAirplane Design ran some rather careful tests few years back covering wide range variables confirmed relationship within percent two hold number strands rather merely total cross-section has effect 28 strands Y8 rubber acts differently 14 strands / might true personal opinion effect small under normal circumstances effect small because motors sufficiently well lubricated Rebuttle Blue Ridge Models Alive Well unfortunates wait over four months receive order grumble no Blue Ridge back normal unexpected volume orders delayed shipment balsa move new house put Blue Ridge little behind Phil Shirley Hartman Charlie Johnson 3716 Ingraham St San Diego CA 92109 FF Duration/Mouser continued page 42 test series entered except Nats took second After ten years competi tion flying including thousands flights Copy Cat splattered itself against asphalt Buckeye Arizona last year after Vic added auto surfaces attempt improve its performance Scorcher has higher aspect ratio longer tail mo ment arm smaller 30% horizontal tail FAT-ish might say no auto-tail Other changes primarily cosmetic Construction typical of Vics models have featured Flying Models Rubber Motor Turns Tables giving motor turns various numbers strands motor lengths pop-up literature time time similar presented has published last decade two must have missed tables apply specific kind rubber ap plies kinds works Example just received new batch /4 rubber plan make up 16strand motors 42 inches long wonder turns should expect out such motor could simply make up few such motors test de struction such motors now cost ing $2 might like try alternative Make up two three twostrand motors say 10 inches long break test wind destruction Say break about 700 turns 98 Model Aviation OVER EEO978 CAA 000 SCALE DRAWN Ssoc MORR SON ECH 48500 M KENZ E HWYV IJA OR 9 488 Darryl Stevens demonstrates approved helicopter launching technique Model holds two records does about 4 mm dead air 600 turns four strands rubber youd like explore fringes outer space drawing appeared April issue Curt Stevens pic Blue Ridge Models what used spare time have already sold around 500 fine Coupe dHiver kit find rather amazing considering kit expensive advertising largely word mouth kit sold direct mail estimate num ber competition-oriented Coupe fliers country Id have come conclusion already has two Blue Ridge Coupes Free flight apparently much larger what meets eye still big enough entice Big Boys business market kits some not-all-that-popular competition events Meanwhile fortunate being able obtain high quality kits cottageindustry outfits such Blue Ridge handful others have mentioned time time overlooked Blue Ridges Coupe props rib sets sold separately kits its kits handlaunch gliders sport P-30 models vast assortment free-flight good ies catalog send SASE Blue Ridge Models PO Box 429 Skyland NC 28776 Tell Bob sent receive DT rubberband absolutely free X-Acto Knife Fix Have trouble unleashing blade pet X-Acto knife after cinching tight tough job Try wrap Teflon tape-dope around collet stuff slippery stretchy conforms anything intended sealing pipe threads available plumbing section hardware stores Make Friends influence Free Flighters People Everybody Else decide write total stranger ask him about model someone name appeared magazine contest results listing Since yet first-name basis start out Dear Sir better Dear Mr Smith Cautious formal restrained feeling uncomfort able formality sign letter simply Al being sure put full name address top course Chances reply will come back Dear Al old buddies stantly works Outstanding Performance National Records getting official AMA National Records ever b Senior c month d day record-records would have go C Keith Martin Keiths dad Charlie Martin Bellevue Washing ton must have picked up few pointers along way wound up team representing USA 1977 FAI World Champs As Junior Keith picked up nine re cords during 1971 As Senior during period March 1972 through December 1975 picked up additional 69 re cords grand total 78 During month December 1975 gathered 24 things 27th month set two records three door ceiling-height categories two Outdoor categories record one-day total eight logistics boggle mind Keiths Indoor records set Autogiro Ornithopter Helicopter events easy ones Easy . Ok kiddo lets see six-minutes-plus autogiro Outdoor records slice cross section through Power Rubber Rocket events Can top Keith estab lished nine records Junior surely someone must have topped Linda Randolph Marty Thompson Lets hear about eh Bob Meuser 4200 Gregory St Oak land CA 94619 FF Old Timers/Haught continued page 43 satisfaction Imagine thrill flying own engine Get Straight Im often asked measure wing stabilizer incidence angles particularly undercambered wing sections modelers real ize undercambered wings treated same flat-bottomed cousins straightedge placed across leading trailing edge becomes reference line following excerpt Flight Plug monthly newsletter Southern California Ignition Flyers provides good technique measuring incidence Next checking warps important aspect rigging new ship re-rigging old determining and/or setting incidence thrust angles some huge ships can sticky operation Heres trick try wheels bench prop up tail books until stab platform level Use line levels size fat hexagon pencil about 3 inches long OK stab zero Now lay level along wing mount positioned its base overhangs outer edge mount just bit Place straight piece cardboard against base level Keeping front level against wing mount carefully raise rear level using cardboard until bubble centers Now put pencil mark cardboard indicate much raised center bubble Draw straight line mark point cardboard under front level Measure line protrac tor against base cardboard thats wing incidence Use same technique checking pitch motor mounts Troubleshooting times old engine just doesnt want cooperate Invariably occurs inop portune moment just before official flight example Most us grab screwdriver begin checking wiring shorts opens cold-solder joints time honored arcing test cur rent better way suggested Don Jenkins Indianapolis Don writes have found 3-volt bulb wires soldered contacts makes very good inexpensive test light will also give pretty good September1978 99 course could hasten process starting out Dear Fred first place reply comes back Dear Mr Jones trouble Formality has its place guess seems best reserved use people mad at
Edition: Model Aviation - 1978/09
Page Numbers: 40, 41, 42, 98, 99
Free Flight. Du ration Bob Meu ser OLD-TIMER Month After pre senting two old-timer helicopter models both hold current national AMA records couldnt resist bringing latest thing old-timer hand-launch glid ers Thermic 18 also holds several current national records Between mid-fifties midsixties youngster name Curt Stevens developed timeless Thermic formidable competition machine both indoor outdoor competition During period 1955 1963 Curt co-conspirators took four Nats firsts two seconds least nine na tional AMA records among other things After first taste bloodfourth place 1953 Plymouth Internationals Curt never placed lower second place contest never beaten twice same person Since Curts retirement competi tion about 1965 nothing much has seen heard greatly-modified Thermic glider fact no pass ably accurate drawings model ever published passed around might have little something Meanwhile Curt took unto him self wife begat couple man-kids became normal course events teenagers came pass Nats having nothing better roosted spell Southern California 1977 phenomenon did escape notice Stevens family During official Nats competition clan Stevens did rather well Indoor HLG competition Darryl got first Junior two-flight score 1078 seconds Gary took second place Senior 1190 seconds merely warm-up enthusiastic indulgence event director Bill Vanderbeek help photographer kept shooting off flashbulbs faces keep awake Darryl Gary until midnight results Junior Category II record 1034 sec exceeds Cat III record would have second Bill Blanchards score Open during official competition Senior Cat II record 1526 sec would have topped best ficial Nats score some 14 seconds beat existing Cat III score topped Open Cat II record some 10 seconds boot bad couple Vic Cuiinyjnhams scc1d2Et2 850 K iJi~ 1 -Ikids never flown Indoor HLG except three meets Chicago some years earlier until very day Darryl also holds current outdoor record pod-and-boom fuselage pure Thermic quite likely influenced highly successful Joe Hervat gliders thirties major influences modifications tuning came Oakland Cloud Dusters top bananas HLG early fifties Rob bers Bilgri Foster Rambo Andrade Cole Lenderman Foote Pete Mike Demos Joe Foster spent lot time teaching Curt adjust glider before throwing accuracy models built plate glass surfaces rudders com pletely finished before cutting loose larger sheet wood stab ilizer mount trimmed zero incidence angle after wing fuselage finished assembled aged Jigs used ensure getting proper dihedral angles Joints made cyanoacrylate adhesiveEastman 910 Hot Stuffand skin built-up over joint using Hobby Shacks Quick Tack glue Since Stevens Sal Taibi once partners Competition Models seems unlikely Stevenses make second-grade balsa drawing made Curt measurements actual models might well serve standard textbook moderate-ceiling Indoor HLG Its Nothing new its rattling around Curts head 20 years Confusion Chart especially interest ing says low ceilings needs light gliders bit undercamber everybody knows presents Curts best guesses proper com binations example says flying design 84-ft site can keep weight down 04 oz about 11 grams dont need cant profit undercamber 40 Model Aviation 36 Tom Hutchinsons 1/2A Maverick received coveted Model Year Awards trom National Free Flight Society De luxe kit available RM Enterprises Albany Oregon GI LEv-K C 0 AT RICH ANGLES OF ATTACK 812 050 THICK AT 3 % OTINAL IIRAWIN AVAILABLE STAB SECTIONFOR $150 POSTPAI NFFS 100rPOTENTSAS 1 0 DARRYLS 53 OZ 90 CE SLING GARYS .jl OZ BEST FE 119 \IRDICATES005 010 QLS 00 354045555 - _____ GNFUSIOILXHART BUILT STRAIGHT AS POSSIBLE NOWASHOUT NOWASHIN NOTILT NOOFFSET050 FLYS OK CLIMBS WITH 3/4 TUENTO THE BIGHT VERY STEEP ASGLU NO ROLL OUT RECOVERY IS BY WAY OF SW SLIP TO THE RIGHT SIDE WITHIN 105 INCHES OF THE CEILING GLIDES LEFT ALL GIMI FROM AOU SUL Aj5CC L3ALA 005 400041300 cn CD005005 ____________________01 950DM REQUIRES BIN OF 100 FT DIA GLIDE CIRCLE020 -FOR ECENT FLIGHT TIllER 2300 FT IS BETTER CD SECTIONALL 00 SETTINGS 0__--\ -1 UNNAMED GLIDER FOR 77 HATS -- T59%TOSRTWIT740GARY STEVENS CAT II SR RECORD AT ATS ___________DARRYL STEVENS CAT II Ill RECORD AT 77 HATS -a require near-perfect launches achieve potentially increased flight duration Given hazards Nats competition Curt opted conservative design record setting models no finish other smooth sandingcouldnt af ford weight given druthers Curt would have opted glassy-smooth finish Although Stevenses started out about dozen models close encounters worst kind lamp hangars rafters dwindled down about record-setting models appearance having spent tough winter closet full moths So whats future Cat II scores like Cat III records would seem like cinch possibility Darryl Gary ever getting access Cat III site Nil Besides hot RC gliders nowadays Too bad sort of.. Full-size prints Stevenss original drawing published half size available $150 postpaid NFFS Plans Publications c/o Jack Brown 20267 Northbrook Sq Cupertino CA 95014 Ten Models Year Due circum stances beyond control gives especially great pleasure announce Ten Models Year selected National Free Flight Society 1978 International Classes FlANordic Andres Lepp USSR AL-29 FlBWakefield Kim Dong Sik N Korean team FlCPower Thomas Koster Den mark Speed Cream weight up around 05 oz 14 grams tamed lighter low-undercamber AMA/Outdoor Classes model might profit about 080 combinations Large Power Models Ed Bellinger undercamber course applies Curt also says better times could GYSOB particular design larger smaller made using longer nose tail- Small Power Models Tom Hutchinson models results would differ Curt boom lengths smaller stab Maverick states though best times will ob- model wouldnt stable would Rubber Power George Perryman Great Speckled Bird Special wards Bob Meuser No Non-Cents Pennyplane trade Flying Aces Club Bridgeport Conn Peanut Scale event Indoor Jim Richmond Cat Walker Stan Mike Stoy Coot handlaunch glider Stories about models drawings will appear Report Eleventh Annual NFFS Symposium will frantically published just hairs breadth ahead Nats according custom logistics permit award recipients will give speil models NFFS Sympo takes place Nats Scorcher 850 Vic Cunnyngham Jrs latest biggie classes B C D replaces Copy Cat 900 took __________at least first place major conTable Rubber Motor TurnsContinued page 98 42 Model Aviation Portrait serious HI gliderman Young Gary Stevens brother Darryl set three impressive records last Nats Oldtimers still talk about dad Curt holy terror 1 955-65 decade Like him fly highly developed derivative Thermic 18 STRANDSTURNS PER INCH 25055606570758085 4353389424460495530566601 6289318346375404433462491 8250275300325350375400425 10224246268291313335358380 12204224245265286306327347 14189208227246265283302321 16177194212230247265283301 18167183200217233250267283 20158174190206221237253269 22151166181196211226241256 24144159173188200217231245 $100PmnutNo 7 Curt. XF6C-6 Capt Pages MODERNISTIC MODELS PO BOX 6974 ALBUQ NM 87197 nice have plug fast lasts icing cake fact engine would run very rich dying Ive discouraged some brands plugs Id considered going diesels well maybe just ignition engines Something else really works Brasher/McFadden fuel regulator babies hard come Norm fixed motors installed same time Rather half turn adjust ment needle have about five turns plane holds its speed through turns much better because engine isnt dropping off lean insides slightly rich outsides regulator sometimes available Norm Duke Fox has experimented may possible make avail able commercially motors exactly 10 inches long would 70 turns per inch table go across 2 Number Strands column 70 Turns per inch columns go down 70 column until opposite 16 Strands column read off 247 turns per inch Multiply 42the length motors beand get 1037 turns table based notion turns-per-inch inversely proportional square root cross-sectional area relationship easy come ignore details what happens inside squirrely mess wound-up rub ber seems match exper iments proof pudding first published thirties J P Glass writing Zaics yearbooks appeared also later editions Charles Hampson Grants ModelAirplane Design ran some rather careful tests few years back covering wide range variables confirmed relationship within percent two hold number strands rather merely total cross-section has effect 28 strands Y8 rubber acts differently 14 strands / might true personal opinion effect small under normal circumstances effect small because motors sufficiently well lubricated Rebuttle Blue Ridge Models Alive Well unfortunates wait over four months receive order grumble no Blue Ridge back normal unexpected volume orders delayed shipment balsa move new house put Blue Ridge little behind Phil Shirley Hartman Charlie Johnson 3716 Ingraham St San Diego CA 92109 FF Duration/Mouser continued page 42 test series entered except Nats took second After ten years competi tion flying including thousands flights Copy Cat splattered itself against asphalt Buckeye Arizona last year after Vic added auto surfaces attempt improve its performance Scorcher has higher aspect ratio longer tail mo ment arm smaller 30% horizontal tail FAT-ish might say no auto-tail Other changes primarily cosmetic Construction typical of Vics models have featured Flying Models Rubber Motor Turns Tables giving motor turns various numbers strands motor lengths pop-up literature time time similar presented has published last decade two must have missed tables apply specific kind rubber ap plies kinds works Example just received new batch /4 rubber plan make up 16strand motors 42 inches long wonder turns should expect out such motor could simply make up few such motors test de struction such motors now cost ing $2 might like try alternative Make up two three twostrand motors say 10 inches long break test wind destruction Say break about 700 turns 98 Model Aviation OVER EEO978 CAA 000 SCALE DRAWN Ssoc MORR SON ECH 48500 M KENZ E HWYV IJA OR 9 488 Darryl Stevens demonstrates approved helicopter launching technique Model holds two records does about 4 mm dead air 600 turns four strands rubber youd like explore fringes outer space drawing appeared April issue Curt Stevens pic Blue Ridge Models what used spare time have already sold around 500 fine Coupe dHiver kit find rather amazing considering kit expensive advertising largely word mouth kit sold direct mail estimate num ber competition-oriented Coupe fliers country Id have come conclusion already has two Blue Ridge Coupes Free flight apparently much larger what meets eye still big enough entice Big Boys business market kits some not-all-that-popular competition events Meanwhile fortunate being able obtain high quality kits cottageindustry outfits such Blue Ridge handful others have mentioned time time overlooked Blue Ridges Coupe props rib sets sold separately kits its kits handlaunch gliders sport P-30 models vast assortment free-flight good ies catalog send SASE Blue Ridge Models PO Box 429 Skyland NC 28776 Tell Bob sent receive DT rubberband absolutely free X-Acto Knife Fix Have trouble unleashing blade pet X-Acto knife after cinching tight tough job Try wrap Teflon tape-dope around collet stuff slippery stretchy conforms anything intended sealing pipe threads available plumbing section hardware stores Make Friends influence Free Flighters People Everybody Else decide write total stranger ask him about model someone name appeared magazine contest results listing Since yet first-name basis start out Dear Sir better Dear Mr Smith Cautious formal restrained feeling uncomfort able formality sign letter simply Al being sure put full name address top course Chances reply will come back Dear Al old buddies stantly works Outstanding Performance National Records getting official AMA National Records ever b Senior c month d day record-records would have go C Keith Martin Keiths dad Charlie Martin Bellevue Washing ton must have picked up few pointers along way wound up team representing USA 1977 FAI World Champs As Junior Keith picked up nine re cords during 1971 As Senior during period March 1972 through December 1975 picked up additional 69 re cords grand total 78 During month December 1975 gathered 24 things 27th month set two records three door ceiling-height categories two Outdoor categories record one-day total eight logistics boggle mind Keiths Indoor records set Autogiro Ornithopter Helicopter events easy ones Easy . Ok kiddo lets see six-minutes-plus autogiro Outdoor records slice cross section through Power Rubber Rocket events Can top Keith estab lished nine records Junior surely someone must have topped Linda Randolph Marty Thompson Lets hear about eh Bob Meuser 4200 Gregory St Oak land CA 94619 FF Old Timers/Haught continued page 43 satisfaction Imagine thrill flying own engine Get Straight Im often asked measure wing stabilizer incidence angles particularly undercambered wing sections modelers real ize undercambered wings treated same flat-bottomed cousins straightedge placed across leading trailing edge becomes reference line following excerpt Flight Plug monthly newsletter Southern California Ignition Flyers provides good technique measuring incidence Next checking warps important aspect rigging new ship re-rigging old determining and/or setting incidence thrust angles some huge ships can sticky operation Heres trick try wheels bench prop up tail books until stab platform level Use line levels size fat hexagon pencil about 3 inches long OK stab zero Now lay level along wing mount positioned its base overhangs outer edge mount just bit Place straight piece cardboard against base level Keeping front level against wing mount carefully raise rear level using cardboard until bubble centers Now put pencil mark cardboard indicate much raised center bubble Draw straight line mark point cardboard under front level Measure line protrac tor against base cardboard thats wing incidence Use same technique checking pitch motor mounts Troubleshooting times old engine just doesnt want cooperate Invariably occurs inop portune moment just before official flight example Most us grab screwdriver begin checking wiring shorts opens cold-solder joints time honored arcing test cur rent better way suggested Don Jenkins Indianapolis Don writes have found 3-volt bulb wires soldered contacts makes very good inexpensive test light will also give pretty good September1978 99 course could hasten process starting out Dear Fred first place reply comes back Dear Mr Jones trouble Formality has its place guess seems best reserved use people mad at
Edition: Model Aviation - 1978/09
Page Numbers: 40, 41, 42, 98, 99
Free Flight. Du ration Bob Meu ser OLD-TIMER Month After pre senting two old-timer helicopter models both hold current national AMA records couldnt resist bringing latest thing old-timer hand-launch glid ers Thermic 18 also holds several current national records Between mid-fifties midsixties youngster name Curt Stevens developed timeless Thermic formidable competition machine both indoor outdoor competition During period 1955 1963 Curt co-conspirators took four Nats firsts two seconds least nine na tional AMA records among other things After first taste bloodfourth place 1953 Plymouth Internationals Curt never placed lower second place contest never beaten twice same person Since Curts retirement competi tion about 1965 nothing much has seen heard greatly-modified Thermic glider fact no pass ably accurate drawings model ever published passed around might have little something Meanwhile Curt took unto him self wife begat couple man-kids became normal course events teenagers came pass Nats having nothing better roosted spell Southern California 1977 phenomenon did escape notice Stevens family During official Nats competition clan Stevens did rather well Indoor HLG competition Darryl got first Junior two-flight score 1078 seconds Gary took second place Senior 1190 seconds merely warm-up enthusiastic indulgence event director Bill Vanderbeek help photographer kept shooting off flashbulbs faces keep awake Darryl Gary until midnight results Junior Category II record 1034 sec exceeds Cat III record would have second Bill Blanchards score Open during official competition Senior Cat II record 1526 sec would have topped best ficial Nats score some 14 seconds beat existing Cat III score topped Open Cat II record some 10 seconds boot bad couple Vic Cuiinyjnhams scc1d2Et2 850 K iJi~ 1 -Ikids never flown Indoor HLG except three meets Chicago some years earlier until very day Darryl also holds current outdoor record pod-and-boom fuselage pure Thermic quite likely influenced highly successful Joe Hervat gliders thirties major influences modifications tuning came Oakland Cloud Dusters top bananas HLG early fifties Rob bers Bilgri Foster Rambo Andrade Cole Lenderman Foote Pete Mike Demos Joe Foster spent lot time teaching Curt adjust glider before throwing accuracy models built plate glass surfaces rudders com pletely finished before cutting loose larger sheet wood stab ilizer mount trimmed zero incidence angle after wing fuselage finished assembled aged Jigs used ensure getting proper dihedral angles Joints made cyanoacrylate adhesiveEastman 910 Hot Stuffand skin built-up over joint using Hobby Shacks Quick Tack glue Since Stevens Sal Taibi once partners Competition Models seems unlikely Stevenses make second-grade balsa drawing made Curt measurements actual models might well serve standard textbook moderate-ceiling Indoor HLG Its Nothing new its rattling around Curts head 20 years Confusion Chart especially interest ing says low ceilings needs light gliders bit undercamber everybody knows presents Curts best guesses proper com binations example says flying design 84-ft site can keep weight down 04 oz about 11 grams dont need cant profit undercamber 40 Model Aviation 36 Tom Hutchinsons 1/2A Maverick received coveted Model Year Awards trom National Free Flight Society De luxe kit available RM Enterprises Albany Oregon GI LEv-K C 0 AT RICH ANGLES OF ATTACK 812 050 THICK AT 3 % OTINAL IIRAWIN AVAILABLE STAB SECTIONFOR $150 POSTPAI NFFS 100rPOTENTSAS 1 0 DARRYLS 53 OZ 90 CE SLING GARYS .jl OZ BEST FE 119 \IRDICATES005 010 QLS 00 354045555 - _____ GNFUSIOILXHART BUILT STRAIGHT AS POSSIBLE NOWASHOUT NOWASHIN NOTILT NOOFFSET050 FLYS OK CLIMBS WITH 3/4 TUENTO THE BIGHT VERY STEEP ASGLU NO ROLL OUT RECOVERY IS BY WAY OF SW SLIP TO THE RIGHT SIDE WITHIN 105 INCHES OF THE CEILING GLIDES LEFT ALL GIMI FROM AOU SUL Aj5CC L3ALA 005 400041300 cn CD005005 ____________________01 950DM REQUIRES BIN OF 100 FT DIA GLIDE CIRCLE020 -FOR ECENT FLIGHT TIllER 2300 FT IS BETTER CD SECTIONALL 00 SETTINGS 0__--\ -1 UNNAMED GLIDER FOR 77 HATS -- T59%TOSRTWIT740GARY STEVENS CAT II SR RECORD AT ATS ___________DARRYL STEVENS CAT II Ill RECORD AT 77 HATS -a require near-perfect launches achieve potentially increased flight duration Given hazards Nats competition Curt opted conservative design record setting models no finish other smooth sandingcouldnt af ford weight given druthers Curt would have opted glassy-smooth finish Although Stevenses started out about dozen models close encounters worst kind lamp hangars rafters dwindled down about record-setting models appearance having spent tough winter closet full moths So whats future Cat II scores like Cat III records would seem like cinch possibility Darryl Gary ever getting access Cat III site Nil Besides hot RC gliders nowadays Too bad sort of.. Full-size prints Stevenss original drawing published half size available $150 postpaid NFFS Plans Publications c/o Jack Brown 20267 Northbrook Sq Cupertino CA 95014 Ten Models Year Due circum stances beyond control gives especially great pleasure announce Ten Models Year selected National Free Flight Society 1978 International Classes FlANordic Andres Lepp USSR AL-29 FlBWakefield Kim Dong Sik N Korean team FlCPower Thomas Koster Den mark Speed Cream weight up around 05 oz 14 grams tamed lighter low-undercamber AMA/Outdoor Classes model might profit about 080 combinations Large Power Models Ed Bellinger undercamber course applies Curt also says better times could GYSOB particular design larger smaller made using longer nose tail- Small Power Models Tom Hutchinson models results would differ Curt boom lengths smaller stab Maverick states though best times will ob- model wouldnt stable would Rubber Power George Perryman Great Speckled Bird Special wards Bob Meuser No Non-Cents Pennyplane trade Flying Aces Club Bridgeport Conn Peanut Scale event Indoor Jim Richmond Cat Walker Stan Mike Stoy Coot handlaunch glider Stories about models drawings will appear Report Eleventh Annual NFFS Symposium will frantically published just hairs breadth ahead Nats according custom logistics permit award recipients will give speil models NFFS Sympo takes place Nats Scorcher 850 Vic Cunnyngham Jrs latest biggie classes B C D replaces Copy Cat 900 took __________at least first place major conTable Rubber Motor TurnsContinued page 98 42 Model Aviation Portrait serious HI gliderman Young Gary Stevens brother Darryl set three impressive records last Nats Oldtimers still talk about dad Curt holy terror 1 955-65 decade Like him fly highly developed derivative Thermic 18 STRANDSTURNS PER INCH 25055606570758085 4353389424460495530566601 6289318346375404433462491 8250275300325350375400425 10224246268291313335358380 12204224245265286306327347 14189208227246265283302321 16177194212230247265283301 18167183200217233250267283 20158174190206221237253269 22151166181196211226241256 24144159173188200217231245 $100PmnutNo 7 Curt. XF6C-6 Capt Pages MODERNISTIC MODELS PO BOX 6974 ALBUQ NM 87197 nice have plug fast lasts icing cake fact engine would run very rich dying Ive discouraged some brands plugs Id considered going diesels well maybe just ignition engines Something else really works Brasher/McFadden fuel regulator babies hard come Norm fixed motors installed same time Rather half turn adjust ment needle have about five turns plane holds its speed through turns much better because engine isnt dropping off lean insides slightly rich outsides regulator sometimes available Norm Duke Fox has experimented may possible make avail able commercially motors exactly 10 inches long would 70 turns per inch table go across 2 Number Strands column 70 Turns per inch columns go down 70 column until opposite 16 Strands column read off 247 turns per inch Multiply 42the length motors beand get 1037 turns table based notion turns-per-inch inversely proportional square root cross-sectional area relationship easy come ignore details what happens inside squirrely mess wound-up rub ber seems match exper iments proof pudding first published thirties J P Glass writing Zaics yearbooks appeared also later editions Charles Hampson Grants ModelAirplane Design ran some rather careful tests few years back covering wide range variables confirmed relationship within percent two hold number strands rather merely total cross-section has effect 28 strands Y8 rubber acts differently 14 strands / might true personal opinion effect small under normal circumstances effect small because motors sufficiently well lubricated Rebuttle Blue Ridge Models Alive Well unfortunates wait over four months receive order grumble no Blue Ridge back normal unexpected volume orders delayed shipment balsa move new house put Blue Ridge little behind Phil Shirley Hartman Charlie Johnson 3716 Ingraham St San Diego CA 92109 FF Duration/Mouser continued page 42 test series entered except Nats took second After ten years competi tion flying including thousands flights Copy Cat splattered itself against asphalt Buckeye Arizona last year after Vic added auto surfaces attempt improve its performance Scorcher has higher aspect ratio longer tail mo ment arm smaller 30% horizontal tail FAT-ish might say no auto-tail Other changes primarily cosmetic Construction typical of Vics models have featured Flying Models Rubber Motor Turns Tables giving motor turns various numbers strands motor lengths pop-up literature time time similar presented has published last decade two must have missed tables apply specific kind rubber ap plies kinds works Example just received new batch /4 rubber plan make up 16strand motors 42 inches long wonder turns should expect out such motor could simply make up few such motors test de struction such motors now cost ing $2 might like try alternative Make up two three twostrand motors say 10 inches long break test wind destruction Say break about 700 turns 98 Model Aviation OVER EEO978 CAA 000 SCALE DRAWN Ssoc MORR SON ECH 48500 M KENZ E HWYV IJA OR 9 488 Darryl Stevens demonstrates approved helicopter launching technique Model holds two records does about 4 mm dead air 600 turns four strands rubber youd like explore fringes outer space drawing appeared April issue Curt Stevens pic Blue Ridge Models what used spare time have already sold around 500 fine Coupe dHiver kit find rather amazing considering kit expensive advertising largely word mouth kit sold direct mail estimate num ber competition-oriented Coupe fliers country Id have come conclusion already has two Blue Ridge Coupes Free flight apparently much larger what meets eye still big enough entice Big Boys business market kits some not-all-that-popular competition events Meanwhile fortunate being able obtain high quality kits cottageindustry outfits such Blue Ridge handful others have mentioned time time overlooked Blue Ridges Coupe props rib sets sold separately kits its kits handlaunch gliders sport P-30 models vast assortment free-flight good ies catalog send SASE Blue Ridge Models PO Box 429 Skyland NC 28776 Tell Bob sent receive DT rubberband absolutely free X-Acto Knife Fix Have trouble unleashing blade pet X-Acto knife after cinching tight tough job Try wrap Teflon tape-dope around collet stuff slippery stretchy conforms anything intended sealing pipe threads available plumbing section hardware stores Make Friends influence Free Flighters People Everybody Else decide write total stranger ask him about model someone name appeared magazine contest results listing Since yet first-name basis start out Dear Sir better Dear Mr Smith Cautious formal restrained feeling uncomfort able formality sign letter simply Al being sure put full name address top course Chances reply will come back Dear Al old buddies stantly works Outstanding Performance National Records getting official AMA National Records ever b Senior c month d day record-records would have go C Keith Martin Keiths dad Charlie Martin Bellevue Washing ton must have picked up few pointers along way wound up team representing USA 1977 FAI World Champs As Junior Keith picked up nine re cords during 1971 As Senior during period March 1972 through December 1975 picked up additional 69 re cords grand total 78 During month December 1975 gathered 24 things 27th month set two records three door ceiling-height categories two Outdoor categories record one-day total eight logistics boggle mind Keiths Indoor records set Autogiro Ornithopter Helicopter events easy ones Easy . Ok kiddo lets see six-minutes-plus autogiro Outdoor records slice cross section through Power Rubber Rocket events Can top Keith estab lished nine records Junior surely someone must have topped Linda Randolph Marty Thompson Lets hear about eh Bob Meuser 4200 Gregory St Oak land CA 94619 FF Old Timers/Haught continued page 43 satisfaction Imagine thrill flying own engine Get Straight Im often asked measure wing stabilizer incidence angles particularly undercambered wing sections modelers real ize undercambered wings treated same flat-bottomed cousins straightedge placed across leading trailing edge becomes reference line following excerpt Flight Plug monthly newsletter Southern California Ignition Flyers provides good technique measuring incidence Next checking warps important aspect rigging new ship re-rigging old determining and/or setting incidence thrust angles some huge ships can sticky operation Heres trick try wheels bench prop up tail books until stab platform level Use line levels size fat hexagon pencil about 3 inches long OK stab zero Now lay level along wing mount positioned its base overhangs outer edge mount just bit Place straight piece cardboard against base level Keeping front level against wing mount carefully raise rear level using cardboard until bubble centers Now put pencil mark cardboard indicate much raised center bubble Draw straight line mark point cardboard under front level Measure line protrac tor against base cardboard thats wing incidence Use same technique checking pitch motor mounts Troubleshooting times old engine just doesnt want cooperate Invariably occurs inop portune moment just before official flight example Most us grab screwdriver begin checking wiring shorts opens cold-solder joints time honored arcing test cur rent better way suggested Don Jenkins Indianapolis Don writes have found 3-volt bulb wires soldered contacts makes very good inexpensive test light will also give pretty good September1978 99 course could hasten process starting out Dear Fred first place reply comes back Dear Mr Jones trouble Formality has its place guess seems best reserved use people mad at