Radio Control Sport Aerobatics Ron Van Putte HERE S scenano try out s contest contestants supposed run end hallway other end penalized time touch wall Sound reasonable Oh almost forgotthey blindfolded cant see walls Does still sound reasonable should contestant penalized touches wall cant see Thats rules Now try scenario Theres RC Pattern event called Turnaround contestants penalized whenever airplane flies out box limits box marked judges can see problem pilots cant see Consequently being penalized flying out box cant see Does above sound ridiculous saw hap pen recent contest out-of-box markers very small placed against backdrop small trees pilots could see unless took eyes off airplanes box judge yes judge sole job determine airplane left box sitting behind pilot Consequently airplane could have according pilots view out judges view Compound fact close encounter box limits judged out have bunch frustrated pilots Im enforcing box Turnaround competition seems limits box must marked both pilots judges can see marginal ap proach box limit should called judge front pilot rules proposal combine Expert Master classes Open class has met uniform acceptance surprisingly representa tives parts country high concentration Master class competitors dont want proposal pass arguments can summarized excerpts article Peter Callas Steve McCann NSRCA District 7 co vice-presidents wrote K-Factor news letter National Society Radio Control Aerobatics NSRCA both Californians lot activity Master class Heres some what say have hashed over reasons AMA Masters Expert classes should joined new Open class pattern simplified pattern put place obviously lot serious Master fliers District 7 little concern powers other parts coun try certain areas country have heard comments about no low ExpertlMasters turn outs contests Does mean should eliminate Expert Masters combine District 7 few years ago very 50 Model Aviation Bob Hanson Niceville FL loads beans cup mounted entry Bean Fly event Eglin Aero Modelers Fun Fly cup still held 10 beans after takeoff loop roll landing completed 4 mean youve never heard about fuel injection Actually Van Putte plugs end fuel tank presurizatlon line onto glow plug confirm has refilled tank engine cant started until pipe-pressure tubing has removed glow plug reattached pressure nipple pipe about having Pattern event ail 0 best Iiers country orthe worlal fly airplaneand theres screen between pilot judges Hobby Shack Supra-Fly would make good candidate forthe plane used Theres discussion about concept Rons column month low turnouts FAI never heard us suggest ing eliminate FAI though low tumouts FAI offered contest run district would really appreciate everybody writing AMA Contest Board member expres sing opinions following paragraph excerpt December issue K-Factor think outlines some points merit concerning rule proposal would combine Expert Master class current class system should stay exactly way progressions vital improvement flying skills flier jump Advanced Master class too large jump Typically Expert class flier learns truly trim airplane fly properly Out West Coast quality Master class flying am sure other areas country second dedication commitment fliers rivals Master flier decides participate FAI team-selection process has trimming flying knowledge make smooth suc cessful transition current top FAI fliers master fliers flew Expert Masters learned about flying trimming classes Some proponents all-FAI-class Pattern think quality FAI flier would improve fliers came up through FAI-type classes None top fliers came IMAC FAI-style flying Id like see Pattern continue grow like has quality flying continue [to improve] way has thats believe elimi nating AMA-type Pattern combining Expert Masters step backwards entire sport Read rules proposals AMA magazine read carefully please take five minutes time 22 cents write Contest Board member names addresses listed AMA magazine First clarify item AMA maga zine called Model Aviation rules pro posals have published discussed sev eral its back issues Rules proposals December 1986 January-February 1987 issues RMcM Second dont agree combination Expert Masters end world isnt step backward am Expert class com petitor dont exactly relish idea being clobbered Master class pilots contests Id probably live through However thing would convince would good idea combine classes would Beginners FAI class also created ease transition between AMA FAI styles flying transition class would provide real competition among competitors new turnaround embar rassment being clobbered initially FAI pros Whether viable option cur rent rules cycle dont know However isnt highlights issues critics current system rules change citelack flexi bility permitted Contest Board members Ive talked extensively about rules change proposals John Fuqua District 5 RC Aerobatics Contest Board member per plexed apathy hes discovering issue combining Expert Master classes has received no written feedback District 5 members subject wrote him letter opposing proposal could say dis trict unanimous its opposition proContinued page 150 SCALE RADIO CONTROL WH CONTROL-UNE FREE-FLIGHT 411000 VINTAGESMOOTHGOLDEN AGENEW sizes21/2CONTOURsizes214BALLOON 31/~%234 343/2 1334134133421441/2 11443/i114311443/2314514 11/2511/241411/25334 1/65/a214514l7/61/2 SCALE PILOTS CYLINDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS [JLLAJ Send $2 fully illustrated catalog other kits accessodes DEPT MA PAWNEE ST SAN MARCOS CA 9 Juiy 1987 51 rSOUTHERN PRO RETRACTS SERVOFormerly ACTUATEDPRO-LINE FORand RELIABILITYSOUTHERN R/C SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON 01-I 45013 513 738-1576 IF THE RADIO WORKS THE LANDING GEAR WORKS IF THE RADIO DOESNT WORK IT DOESNT AlA TTER Send 50g aSASEIo Internationai Rd AIONA%a00vpcr Mt View CA t951tAenOan ns e na00Set el anna0 non-,oaeaeC,n MOW POP PlC em 0a Oa and2oneu0p0O~0 BUMBLE VEE FLYING FUN 2 super little sport plane Bumble Vee designed 05 electric power Fast building different looking great flying Bumble Vee pure fun fl PROIUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 organization called Vintage Sailplane Association dedicated preservation flying antique Gliders national publication called Bungee Cord VSA really good source documentation vin tage Sailplanes have first-class archivist person Mr Lee Buell 13507 Brightfield Lane Hemdon VA 22071 Data available VSA members also nonmembers Builders should check Lee subjects available prices can tell wealth information hand last can document some strange birds have eager try couldnt find proof-of-scale would urge Scale fans contact Lee Jan Scott Scott Airpark Lovettsville VA 22080 get membership information wonderful orga nization Membership very inexpensive efforts quite genuine As said above membership required have access material what nice way say Thank plus receive Bungee Cord guess would too out character mention passing have signed editor Model Soaring column Bungee Cord Since Bungee Cord full-scale publica tion consider quite honor will try very hard keep interesting What means reach Level V following piece Mike Hickman Pikes Peak Soaring Societys newsletter Randy Randy Reynolds clubs newsletter editor resident hyper person Hope enjoy did quite some time now Randy has after write article club newsletter about what means feels like reach Level V League Silent Flights Sodring Ac complishment Program Ive sat down now several different occasions write task much difficult ever imag ined Its sort like trying talk about close friend has just passed away five years goal reaching Level V seemed control move made Soaring day finally reached goal swallowed left huge vacuum left goal properly place perspective need know something about LSF Program help have included copy also includes summary require ments level take moment study requirements quickly obvious start quite simple tasks progres sively increase difficulty started flying Sailplanes August 81 1 like other newcomers sport could get plane up lucky enough stumble thermal might get 10- 15-minute flight wasnt until flew first contest hooked both competition camaraderie same time humbled little knew about didnt take much see rate going sure wouldnt winning contests make long story short found out about LSF program immediately apparent tool needed program didnt have worry about first goal having to win contests would come later now con centrate requirements Level I just make couple five-minute flights learn land reasonably close spot ground Now wasnt too bad Bring Level II Now landings get touch demanding have start flying contests wait dont seem intimidating now Could possibly due Level landing practice sessions point LSF program allows follow well-thought-out series goals leading ever-improving flying skills goal close enough reasonably dedicated individual should able reach result will will start win will eventually find yourself starting work Level V voucher As have already mentioned once com pleted requirements Level V seemed though loss what should next other activities directed toward completing requirements now sud denly found myself goal What let down Well folks its taken six months now now have new goalF3B also have new enthusiasm knows what may next Lets see now next team selection 7? See field Thanks story Mikea very persuasive testimonial value LSF program deed really no reason Sailplaners should participate League Silent Flight improve flying its fun best its practicallyfree get started send name address also enclose five stamps LSF PO Box 647 Mundelein IL 60060 will get back Level voucher full descrip tion program National Soaring Societys 1987 Soar-In Contests will held around country between June 1 July 26 idea have similar contest clubs roughly same time have fun spread word about NSS Marshall Long Texas taking over Dick Crowley Soar-In Coordinator year time read AMA sanctions should set check Contest Calendar magazine Soar-In closest SOARs Scale Uprising coming up August 1 2 original dates July II 12 switched because near-conflict Nats promises biggest all-Scale Soaring event held country Contest Coor dinator Steve Moskal provided details August 1AMA Sport Scale six classes see AMA rule book August 1-2Thermal Duration six classes Ships must have flown AMA Sport Scale In/out 100-ft-diameter circle 20 landing bonus points Duration will five 10 minutes de pending weatherwith objective seven eight rounds flown two days Straight scoring will used no points Sport Scale Electric-motor Gliders will judged flown same above will no limit motor run number charges Byron Blakeslee 3134 Winnebago Dr Se dalia CO 80135 RC Aerobatics/Van Putte Continued page 51 posal have opinion other rule change proposals get off apathy write district Board member recent contest several us talking Don Lowe about what wed like see way competition among top-level national international group RC Aerobatic Pattern fliers consensus wed have everyone fly same airplane wed prevent judges knowing identity flier Wouldnt great carefully-nurtured halos would worthless everyone would have equal chance win basis flying ability alone possible consider such com petition thought kicked around few ideas about obvious place start airplane must capable performing FAI pattern well hands superior pilots thought Hobby Shack Supra Fly 1 50 Model Aviation excellent candidate especially YS engine flies FAI pattern extremely well Since ARF Almost Ready Fly flying charac teristics likely consistent aircraft aircraft arent cheap event like would need major sponsor obviously things would have considered before fair test piloting ability would possible such setup wouldnt great watch best country/world compete nobody un fair advantage/liability Ron Van Pune 111 Sleepy Oaks Rd Ft Wal ton Beach FL 32548 RC Scale/Wischers Continued page 53 calculations indicated about 236 oz per sq ft model actually 259 Everything indi cated would good flying model always pleasantly surprised after model finished closely agrees mathe matical projection Estimated values quickly acquiredand just quickly discarded fall outside expectations Control weight during design construction difficult tasks scratchbuilder Having made some calculations deter estimated wing loading example builder now faced serious problem selecting material placement strengthening structural members avoid exceeding desired maximum weight choice made has always strict policy choose lighter material grounds crashed model will have come apart badly regardless built-in strengthening Wide variations strength also avoided example strong fuselage can survive bad landing due stall weak wing structure shattered stall occurred result overweight condi tion heavy fuselage may well have contributing factor cant build protection against pilot error As preferred construction method weight reduction ease building Scale mod eling must come conclusion dont have fact no two models have built alike duplicating older model wings open structure com mon framework leading edge trailing edge spars ribs has variations new Douglas Mailplane has solid-balsaplank leading edges partially shaped circular saw minimize carving sanding afterward Advantage No spars near leading edge spar near trailing edge good airfoil shape retention Disadvantage style construction expensive could con tribute heavy weight unless special care taken selecting light balsa solid leading edges wings completely sheet-covered have tried foam well conventional rib construction found no appreciable difference final weight strength building time electronic calculator has taken sweat out plotting airfoils tapered wings dozen rib positions Starting Handbook Airfoil Sections Light Aircraft MS Rice airfoil can plotted drawn size matter minutes repetition tapered wing rib positions may become monotonous no worse cutting later balsa sheet Some older Scale models non-scale airfoils seem fly just well later ones true scale shapes Maintaining true airfoil shape fabric-covered wings partially successful due fabric sag between ribs both models full-size planes good reason use scale airfoil appearance de pends upon critical eye viewer use Scale airfoil shapes probably has greater effect flight larger models flat-bottomed airfoil may acceptable Schoolyard Scale would hesitate use small Pylon Racer Building fuselage meet low weight projec tions becomes less difficult model size creases Its small model suffers too-high wing loading Building excess strength fuselage temptation re sisted After bad landing strong fuselage merely has larger pieces summarize scratch-designer can make some fairly accurate estimates design parame ters doubt concerning engine size choose larger displacement take advantage using larger-diameter propellers engine exhaust will less noisy prop will efficient because its tips will working outside cowl front-face area fuel consumption should reduced have no problems over heating large slow-turning props engines seem wear forever Excessive engine wear can traced overheating due lean needle settings inadequate ventilation conditions can exist regardless prop size larger prop may scale diame ter appearance definitely improved scratch-builder has positive control over center-of-gravity location Light balsa aft fuselage tail surfaces can help move all-important balance point comfortable 25% position wing chord first flights Having early estimate total weight observing nose tail moments can definite aid material selection Bob Dolly Wiseher 5-22 1 Lapham Peak Rd Delafleld WI 53018 RC Old-Timers/Mathews Continued page 55 kitted after war Scorpion rate very attractive design available version difficult wing construction size suitable 25-size two-cycle engines 30/40 four-strokers span 66 thereabouts making anything bigger excessive Although writer has never seen Ben Buckle kit certainly several interesting designs line Id appreciate hearing com ments have built Buckle kits lament lost skills David Evans letter mentions 24-year-old working PhD English literature University Virginia Some favorite RC memories spring building flying both Quaker 54 Air Trails Sportster teenager Both flew beautifully old 05 15 surprises somewhat few young people build fly Old-Timers satisfaction great hottest hotshots seem really love putting around sky Powerhouse some such Perhaps immediate generation last came model aviation directly through Comet Guil lows rubber kitswhich make transition stick-built Oldies pretty easy Bill Northrop Model Builder Maga zine has often expressed same concerns GATOR RIC PRODUCTS TIGER TAIL 45 DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offl balsa kit machined wood parts complete hardware package includes plug-in adjustable stab parts new wing mounts Wing Span -72 inWing Area 860 sq complete Delux KitS 15995 PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass filled nylon adjusters included provide micro screw adjustment smaller front tube Main tube aluminum matching phenolic socket TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick rngle s5ck transmitters Brown ather grain aluminum trim locking clasp S 1895 WING TUBE & SOCKETS Aluminum alloy tubing plug-In wings Included pair special slip-fit phenolic sockets build wing structure Now size models 718 diax2t 895 diax25 995 1 diax352495 feather Ilte glass cloth 7 ozlsq yd est weave Fastest Filling est Finished Weight Big 3 Sq Yard Pkg Detailed Instructions 5895 ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily out damage new 60s 17MM rear bearings Sleeve Puller5 795 Searing Puller5 695 ForS1395 IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure wJfl aileron elevator rudder throw Takes guess work out trimming out airplane quality tool complete instrtatkons log book tarrying caseS 795 NEWI WING MOUTifING SET wing mounting system developed Ron chidgey fast neat accurate stays tight Three nylon brackets screws machined wood wing blocks included 5595 See Dealer Order Direct Include S2 Per item UPS GATOR RIC PRODUCTS 3713 Pompano Dr acola Pt 32514 1 476-8639 July1987 151
Edition: Model Aviation - 1987/07
Page Numbers: 50, 51, 150, 151
Radio Control Sport Aerobatics Ron Van Putte HERE S scenano try out s contest contestants supposed run end hallway other end penalized time touch wall Sound reasonable Oh almost forgotthey blindfolded cant see walls Does still sound reasonable should contestant penalized touches wall cant see Thats rules Now try scenario Theres RC Pattern event called Turnaround contestants penalized whenever airplane flies out box limits box marked judges can see problem pilots cant see Consequently being penalized flying out box cant see Does above sound ridiculous saw hap pen recent contest out-of-box markers very small placed against backdrop small trees pilots could see unless took eyes off airplanes box judge yes judge sole job determine airplane left box sitting behind pilot Consequently airplane could have according pilots view out judges view Compound fact close encounter box limits judged out have bunch frustrated pilots Im enforcing box Turnaround competition seems limits box must marked both pilots judges can see marginal ap proach box limit should called judge front pilot rules proposal combine Expert Master classes Open class has met uniform acceptance surprisingly representa tives parts country high concentration Master class competitors dont want proposal pass arguments can summarized excerpts article Peter Callas Steve McCann NSRCA District 7 co vice-presidents wrote K-Factor news letter National Society Radio Control Aerobatics NSRCA both Californians lot activity Master class Heres some what say have hashed over reasons AMA Masters Expert classes should joined new Open class pattern simplified pattern put place obviously lot serious Master fliers District 7 little concern powers other parts coun try certain areas country have heard comments about no low ExpertlMasters turn outs contests Does mean should eliminate Expert Masters combine District 7 few years ago very 50 Model Aviation Bob Hanson Niceville FL loads beans cup mounted entry Bean Fly event Eglin Aero Modelers Fun Fly cup still held 10 beans after takeoff loop roll landing completed 4 mean youve never heard about fuel injection Actually Van Putte plugs end fuel tank presurizatlon line onto glow plug confirm has refilled tank engine cant started until pipe-pressure tubing has removed glow plug reattached pressure nipple pipe about having Pattern event ail 0 best Iiers country orthe worlal fly airplaneand theres screen between pilot judges Hobby Shack Supra-Fly would make good candidate forthe plane used Theres discussion about concept Rons column month low turnouts FAI never heard us suggest ing eliminate FAI though low tumouts FAI offered contest run district would really appreciate everybody writing AMA Contest Board member expres sing opinions following paragraph excerpt December issue K-Factor think outlines some points merit concerning rule proposal would combine Expert Master class current class system should stay exactly way progressions vital improvement flying skills flier jump Advanced Master class too large jump Typically Expert class flier learns truly trim airplane fly properly Out West Coast quality Master class flying am sure other areas country second dedication commitment fliers rivals Master flier decides participate FAI team-selection process has trimming flying knowledge make smooth suc cessful transition current top FAI fliers master fliers flew Expert Masters learned about flying trimming classes Some proponents all-FAI-class Pattern think quality FAI flier would improve fliers came up through FAI-type classes None top fliers came IMAC FAI-style flying Id like see Pattern continue grow like has quality flying continue [to improve] way has thats believe elimi nating AMA-type Pattern combining Expert Masters step backwards entire sport Read rules proposals AMA magazine read carefully please take five minutes time 22 cents write Contest Board member names addresses listed AMA magazine First clarify item AMA maga zine called Model Aviation rules pro posals have published discussed sev eral its back issues Rules proposals December 1986 January-February 1987 issues RMcM Second dont agree combination Expert Masters end world isnt step backward am Expert class com petitor dont exactly relish idea being clobbered Master class pilots contests Id probably live through However thing would convince would good idea combine classes would Beginners FAI class also created ease transition between AMA FAI styles flying transition class would provide real competition among competitors new turnaround embar rassment being clobbered initially FAI pros Whether viable option cur rent rules cycle dont know However isnt highlights issues critics current system rules change citelack flexi bility permitted Contest Board members Ive talked extensively about rules change proposals John Fuqua District 5 RC Aerobatics Contest Board member per plexed apathy hes discovering issue combining Expert Master classes has received no written feedback District 5 members subject wrote him letter opposing proposal could say dis trict unanimous its opposition proContinued page 150 SCALE RADIO CONTROL WH CONTROL-UNE FREE-FLIGHT 411000 VINTAGESMOOTHGOLDEN AGENEW sizes21/2CONTOURsizes214BALLOON 31/~%234 343/2 1334134133421441/2 11443/i114311443/2314514 11/2511/241411/25334 1/65/a214514l7/61/2 SCALE PILOTS CYLINDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS [JLLAJ Send $2 fully illustrated catalog other kits accessodes DEPT MA PAWNEE ST SAN MARCOS CA 9 Juiy 1987 51 rSOUTHERN PRO RETRACTS SERVOFormerly ACTUATEDPRO-LINE FORand RELIABILITYSOUTHERN R/C SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON 01-I 45013 513 738-1576 IF THE RADIO WORKS THE LANDING GEAR WORKS IF THE RADIO DOESNT WORK IT DOESNT AlA TTER Send 50g aSASEIo Internationai Rd AIONA%a00vpcr Mt View CA t951tAenOan ns e na00Set el anna0 non-,oaeaeC,n MOW POP PlC em 0a Oa and2oneu0p0O~0 BUMBLE VEE FLYING FUN 2 super little sport plane Bumble Vee designed 05 electric power Fast building different looking great flying Bumble Vee pure fun fl PROIUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 organization called Vintage Sailplane Association dedicated preservation flying antique Gliders national publication called Bungee Cord VSA really good source documentation vin tage Sailplanes have first-class archivist person Mr Lee Buell 13507 Brightfield Lane Hemdon VA 22071 Data available VSA members also nonmembers Builders should check Lee subjects available prices can tell wealth information hand last can document some strange birds have eager try couldnt find proof-of-scale would urge Scale fans contact Lee Jan Scott Scott Airpark Lovettsville VA 22080 get membership information wonderful orga nization Membership very inexpensive efforts quite genuine As said above membership required have access material what nice way say Thank plus receive Bungee Cord guess would too out character mention passing have signed editor Model Soaring column Bungee Cord Since Bungee Cord full-scale publica tion consider quite honor will try very hard keep interesting What means reach Level V following piece Mike Hickman Pikes Peak Soaring Societys newsletter Randy Randy Reynolds clubs newsletter editor resident hyper person Hope enjoy did quite some time now Randy has after write article club newsletter about what means feels like reach Level V League Silent Flights Sodring Ac complishment Program Ive sat down now several different occasions write task much difficult ever imag ined Its sort like trying talk about close friend has just passed away five years goal reaching Level V seemed control move made Soaring day finally reached goal swallowed left huge vacuum left goal properly place perspective need know something about LSF Program help have included copy also includes summary require ments level take moment study requirements quickly obvious start quite simple tasks progres sively increase difficulty started flying Sailplanes August 81 1 like other newcomers sport could get plane up lucky enough stumble thermal might get 10- 15-minute flight wasnt until flew first contest hooked both competition camaraderie same time humbled little knew about didnt take much see rate going sure wouldnt winning contests make long story short found out about LSF program immediately apparent tool needed program didnt have worry about first goal having to win contests would come later now con centrate requirements Level I just make couple five-minute flights learn land reasonably close spot ground Now wasnt too bad Bring Level II Now landings get touch demanding have start flying contests wait dont seem intimidating now Could possibly due Level landing practice sessions point LSF program allows follow well-thought-out series goals leading ever-improving flying skills goal close enough reasonably dedicated individual should able reach result will will start win will eventually find yourself starting work Level V voucher As have already mentioned once com pleted requirements Level V seemed though loss what should next other activities directed toward completing requirements now sud denly found myself goal What let down Well folks its taken six months now now have new goalF3B also have new enthusiasm knows what may next Lets see now next team selection 7? See field Thanks story Mikea very persuasive testimonial value LSF program deed really no reason Sailplaners should participate League Silent Flight improve flying its fun best its practicallyfree get started send name address also enclose five stamps LSF PO Box 647 Mundelein IL 60060 will get back Level voucher full descrip tion program National Soaring Societys 1987 Soar-In Contests will held around country between June 1 July 26 idea have similar contest clubs roughly same time have fun spread word about NSS Marshall Long Texas taking over Dick Crowley Soar-In Coordinator year time read AMA sanctions should set check Contest Calendar magazine Soar-In closest SOARs Scale Uprising coming up August 1 2 original dates July II 12 switched because near-conflict Nats promises biggest all-Scale Soaring event held country Contest Coor dinator Steve Moskal provided details August 1AMA Sport Scale six classes see AMA rule book August 1-2Thermal Duration six classes Ships must have flown AMA Sport Scale In/out 100-ft-diameter circle 20 landing bonus points Duration will five 10 minutes de pending weatherwith objective seven eight rounds flown two days Straight scoring will used no points Sport Scale Electric-motor Gliders will judged flown same above will no limit motor run number charges Byron Blakeslee 3134 Winnebago Dr Se dalia CO 80135 RC Aerobatics/Van Putte Continued page 51 posal have opinion other rule change proposals get off apathy write district Board member recent contest several us talking Don Lowe about what wed like see way competition among top-level national international group RC Aerobatic Pattern fliers consensus wed have everyone fly same airplane wed prevent judges knowing identity flier Wouldnt great carefully-nurtured halos would worthless everyone would have equal chance win basis flying ability alone possible consider such com petition thought kicked around few ideas about obvious place start airplane must capable performing FAI pattern well hands superior pilots thought Hobby Shack Supra Fly 1 50 Model Aviation excellent candidate especially YS engine flies FAI pattern extremely well Since ARF Almost Ready Fly flying charac teristics likely consistent aircraft aircraft arent cheap event like would need major sponsor obviously things would have considered before fair test piloting ability would possible such setup wouldnt great watch best country/world compete nobody un fair advantage/liability Ron Van Pune 111 Sleepy Oaks Rd Ft Wal ton Beach FL 32548 RC Scale/Wischers Continued page 53 calculations indicated about 236 oz per sq ft model actually 259 Everything indi cated would good flying model always pleasantly surprised after model finished closely agrees mathe matical projection Estimated values quickly acquiredand just quickly discarded fall outside expectations Control weight during design construction difficult tasks scratchbuilder Having made some calculations deter estimated wing loading example builder now faced serious problem selecting material placement strengthening structural members avoid exceeding desired maximum weight choice made has always strict policy choose lighter material grounds crashed model will have come apart badly regardless built-in strengthening Wide variations strength also avoided example strong fuselage can survive bad landing due stall weak wing structure shattered stall occurred result overweight condi tion heavy fuselage may well have contributing factor cant build protection against pilot error As preferred construction method weight reduction ease building Scale mod eling must come conclusion dont have fact no two models have built alike duplicating older model wings open structure com mon framework leading edge trailing edge spars ribs has variations new Douglas Mailplane has solid-balsaplank leading edges partially shaped circular saw minimize carving sanding afterward Advantage No spars near leading edge spar near trailing edge good airfoil shape retention Disadvantage style construction expensive could con tribute heavy weight unless special care taken selecting light balsa solid leading edges wings completely sheet-covered have tried foam well conventional rib construction found no appreciable difference final weight strength building time electronic calculator has taken sweat out plotting airfoils tapered wings dozen rib positions Starting Handbook Airfoil Sections Light Aircraft MS Rice airfoil can plotted drawn size matter minutes repetition tapered wing rib positions may become monotonous no worse cutting later balsa sheet Some older Scale models non-scale airfoils seem fly just well later ones true scale shapes Maintaining true airfoil shape fabric-covered wings partially successful due fabric sag between ribs both models full-size planes good reason use scale airfoil appearance de pends upon critical eye viewer use Scale airfoil shapes probably has greater effect flight larger models flat-bottomed airfoil may acceptable Schoolyard Scale would hesitate use small Pylon Racer Building fuselage meet low weight projec tions becomes less difficult model size creases Its small model suffers too-high wing loading Building excess strength fuselage temptation re sisted After bad landing strong fuselage merely has larger pieces summarize scratch-designer can make some fairly accurate estimates design parame ters doubt concerning engine size choose larger displacement take advantage using larger-diameter propellers engine exhaust will less noisy prop will efficient because its tips will working outside cowl front-face area fuel consumption should reduced have no problems over heating large slow-turning props engines seem wear forever Excessive engine wear can traced overheating due lean needle settings inadequate ventilation conditions can exist regardless prop size larger prop may scale diame ter appearance definitely improved scratch-builder has positive control over center-of-gravity location Light balsa aft fuselage tail surfaces can help move all-important balance point comfortable 25% position wing chord first flights Having early estimate total weight observing nose tail moments can definite aid material selection Bob Dolly Wiseher 5-22 1 Lapham Peak Rd Delafleld WI 53018 RC Old-Timers/Mathews Continued page 55 kitted after war Scorpion rate very attractive design available version difficult wing construction size suitable 25-size two-cycle engines 30/40 four-strokers span 66 thereabouts making anything bigger excessive Although writer has never seen Ben Buckle kit certainly several interesting designs line Id appreciate hearing com ments have built Buckle kits lament lost skills David Evans letter mentions 24-year-old working PhD English literature University Virginia Some favorite RC memories spring building flying both Quaker 54 Air Trails Sportster teenager Both flew beautifully old 05 15 surprises somewhat few young people build fly Old-Timers satisfaction great hottest hotshots seem really love putting around sky Powerhouse some such Perhaps immediate generation last came model aviation directly through Comet Guil lows rubber kitswhich make transition stick-built Oldies pretty easy Bill Northrop Model Builder Maga zine has often expressed same concerns GATOR RIC PRODUCTS TIGER TAIL 45 DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offl balsa kit machined wood parts complete hardware package includes plug-in adjustable stab parts new wing mounts Wing Span -72 inWing Area 860 sq complete Delux KitS 15995 PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass filled nylon adjusters included provide micro screw adjustment smaller front tube Main tube aluminum matching phenolic socket TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick rngle s5ck transmitters Brown ather grain aluminum trim locking clasp S 1895 WING TUBE & SOCKETS Aluminum alloy tubing plug-In wings Included pair special slip-fit phenolic sockets build wing structure Now size models 718 diax2t 895 diax25 995 1 diax352495 feather Ilte glass cloth 7 ozlsq yd est weave Fastest Filling est Finished Weight Big 3 Sq Yard Pkg Detailed Instructions 5895 ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily out damage new 60s 17MM rear bearings Sleeve Puller5 795 Searing Puller5 695 ForS1395 IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure wJfl aileron elevator rudder throw Takes guess work out trimming out airplane quality tool complete instrtatkons log book tarrying caseS 795 NEWI WING MOUTifING SET wing mounting system developed Ron chidgey fast neat accurate stays tight Three nylon brackets screws machined wood wing blocks included 5595 See Dealer Order Direct Include S2 Per item UPS GATOR RIC PRODUCTS 3713 Pompano Dr acola Pt 32514 1 476-8639 July1987 151
Edition: Model Aviation - 1987/07
Page Numbers: 50, 51, 150, 151
Radio Control Sport Aerobatics Ron Van Putte HERE S scenano try out s contest contestants supposed run end hallway other end penalized time touch wall Sound reasonable Oh almost forgotthey blindfolded cant see walls Does still sound reasonable should contestant penalized touches wall cant see Thats rules Now try scenario Theres RC Pattern event called Turnaround contestants penalized whenever airplane flies out box limits box marked judges can see problem pilots cant see Consequently being penalized flying out box cant see Does above sound ridiculous saw hap pen recent contest out-of-box markers very small placed against backdrop small trees pilots could see unless took eyes off airplanes box judge yes judge sole job determine airplane left box sitting behind pilot Consequently airplane could have according pilots view out judges view Compound fact close encounter box limits judged out have bunch frustrated pilots Im enforcing box Turnaround competition seems limits box must marked both pilots judges can see marginal ap proach box limit should called judge front pilot rules proposal combine Expert Master classes Open class has met uniform acceptance surprisingly representa tives parts country high concentration Master class competitors dont want proposal pass arguments can summarized excerpts article Peter Callas Steve McCann NSRCA District 7 co vice-presidents wrote K-Factor news letter National Society Radio Control Aerobatics NSRCA both Californians lot activity Master class Heres some what say have hashed over reasons AMA Masters Expert classes should joined new Open class pattern simplified pattern put place obviously lot serious Master fliers District 7 little concern powers other parts coun try certain areas country have heard comments about no low ExpertlMasters turn outs contests Does mean should eliminate Expert Masters combine District 7 few years ago very 50 Model Aviation Bob Hanson Niceville FL loads beans cup mounted entry Bean Fly event Eglin Aero Modelers Fun Fly cup still held 10 beans after takeoff loop roll landing completed 4 mean youve never heard about fuel injection Actually Van Putte plugs end fuel tank presurizatlon line onto glow plug confirm has refilled tank engine cant started until pipe-pressure tubing has removed glow plug reattached pressure nipple pipe about having Pattern event ail 0 best Iiers country orthe worlal fly airplaneand theres screen between pilot judges Hobby Shack Supra-Fly would make good candidate forthe plane used Theres discussion about concept Rons column month low turnouts FAI never heard us suggest ing eliminate FAI though low tumouts FAI offered contest run district would really appreciate everybody writing AMA Contest Board member expres sing opinions following paragraph excerpt December issue K-Factor think outlines some points merit concerning rule proposal would combine Expert Master class current class system should stay exactly way progressions vital improvement flying skills flier jump Advanced Master class too large jump Typically Expert class flier learns truly trim airplane fly properly Out West Coast quality Master class flying am sure other areas country second dedication commitment fliers rivals Master flier decides participate FAI team-selection process has trimming flying knowledge make smooth suc cessful transition current top FAI fliers master fliers flew Expert Masters learned about flying trimming classes Some proponents all-FAI-class Pattern think quality FAI flier would improve fliers came up through FAI-type classes None top fliers came IMAC FAI-style flying Id like see Pattern continue grow like has quality flying continue [to improve] way has thats believe elimi nating AMA-type Pattern combining Expert Masters step backwards entire sport Read rules proposals AMA magazine read carefully please take five minutes time 22 cents write Contest Board member names addresses listed AMA magazine First clarify item AMA maga zine called Model Aviation rules pro posals have published discussed sev eral its back issues Rules proposals December 1986 January-February 1987 issues RMcM Second dont agree combination Expert Masters end world isnt step backward am Expert class com petitor dont exactly relish idea being clobbered Master class pilots contests Id probably live through However thing would convince would good idea combine classes would Beginners FAI class also created ease transition between AMA FAI styles flying transition class would provide real competition among competitors new turnaround embar rassment being clobbered initially FAI pros Whether viable option cur rent rules cycle dont know However isnt highlights issues critics current system rules change citelack flexi bility permitted Contest Board members Ive talked extensively about rules change proposals John Fuqua District 5 RC Aerobatics Contest Board member per plexed apathy hes discovering issue combining Expert Master classes has received no written feedback District 5 members subject wrote him letter opposing proposal could say dis trict unanimous its opposition proContinued page 150 SCALE RADIO CONTROL WH CONTROL-UNE FREE-FLIGHT 411000 VINTAGESMOOTHGOLDEN AGENEW sizes21/2CONTOURsizes214BALLOON 31/~%234 343/2 1334134133421441/2 11443/i114311443/2314514 11/2511/241411/25334 1/65/a214514l7/61/2 SCALE PILOTS CYLINDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS [JLLAJ Send $2 fully illustrated catalog other kits accessodes DEPT MA PAWNEE ST SAN MARCOS CA 9 Juiy 1987 51 rSOUTHERN PRO RETRACTS SERVOFormerly ACTUATEDPRO-LINE FORand RELIABILITYSOUTHERN R/C SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON 01-I 45013 513 738-1576 IF THE RADIO WORKS THE LANDING GEAR WORKS IF THE RADIO DOESNT WORK IT DOESNT AlA TTER Send 50g aSASEIo Internationai Rd AIONA%a00vpcr Mt View CA t951tAenOan ns e na00Set el anna0 non-,oaeaeC,n MOW POP PlC em 0a Oa and2oneu0p0O~0 BUMBLE VEE FLYING FUN 2 super little sport plane Bumble Vee designed 05 electric power Fast building different looking great flying Bumble Vee pure fun fl PROIUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 organization called Vintage Sailplane Association dedicated preservation flying antique Gliders national publication called Bungee Cord VSA really good source documentation vin tage Sailplanes have first-class archivist person Mr Lee Buell 13507 Brightfield Lane Hemdon VA 22071 Data available VSA members also nonmembers Builders should check Lee subjects available prices can tell wealth information hand last can document some strange birds have eager try couldnt find proof-of-scale would urge Scale fans contact Lee Jan Scott Scott Airpark Lovettsville VA 22080 get membership information wonderful orga nization Membership very inexpensive efforts quite genuine As said above membership required have access material what nice way say Thank plus receive Bungee Cord guess would too out character mention passing have signed editor Model Soaring column Bungee Cord Since Bungee Cord full-scale publica tion consider quite honor will try very hard keep interesting What means reach Level V following piece Mike Hickman Pikes Peak Soaring Societys newsletter Randy Randy Reynolds clubs newsletter editor resident hyper person Hope enjoy did quite some time now Randy has after write article club newsletter about what means feels like reach Level V League Silent Flights Sodring Ac complishment Program Ive sat down now several different occasions write task much difficult ever imag ined Its sort like trying talk about close friend has just passed away five years goal reaching Level V seemed control move made Soaring day finally reached goal swallowed left huge vacuum left goal properly place perspective need know something about LSF Program help have included copy also includes summary require ments level take moment study requirements quickly obvious start quite simple tasks progres sively increase difficulty started flying Sailplanes August 81 1 like other newcomers sport could get plane up lucky enough stumble thermal might get 10- 15-minute flight wasnt until flew first contest hooked both competition camaraderie same time humbled little knew about didnt take much see rate going sure wouldnt winning contests make long story short found out about LSF program immediately apparent tool needed program didnt have worry about first goal having to win contests would come later now con centrate requirements Level I just make couple five-minute flights learn land reasonably close spot ground Now wasnt too bad Bring Level II Now landings get touch demanding have start flying contests wait dont seem intimidating now Could possibly due Level landing practice sessions point LSF program allows follow well-thought-out series goals leading ever-improving flying skills goal close enough reasonably dedicated individual should able reach result will will start win will eventually find yourself starting work Level V voucher As have already mentioned once com pleted requirements Level V seemed though loss what should next other activities directed toward completing requirements now sud denly found myself goal What let down Well folks its taken six months now now have new goalF3B also have new enthusiasm knows what may next Lets see now next team selection 7? See field Thanks story Mikea very persuasive testimonial value LSF program deed really no reason Sailplaners should participate League Silent Flight improve flying its fun best its practicallyfree get started send name address also enclose five stamps LSF PO Box 647 Mundelein IL 60060 will get back Level voucher full descrip tion program National Soaring Societys 1987 Soar-In Contests will held around country between June 1 July 26 idea have similar contest clubs roughly same time have fun spread word about NSS Marshall Long Texas taking over Dick Crowley Soar-In Coordinator year time read AMA sanctions should set check Contest Calendar magazine Soar-In closest SOARs Scale Uprising coming up August 1 2 original dates July II 12 switched because near-conflict Nats promises biggest all-Scale Soaring event held country Contest Coor dinator Steve Moskal provided details August 1AMA Sport Scale six classes see AMA rule book August 1-2Thermal Duration six classes Ships must have flown AMA Sport Scale In/out 100-ft-diameter circle 20 landing bonus points Duration will five 10 minutes de pending weatherwith objective seven eight rounds flown two days Straight scoring will used no points Sport Scale Electric-motor Gliders will judged flown same above will no limit motor run number charges Byron Blakeslee 3134 Winnebago Dr Se dalia CO 80135 RC Aerobatics/Van Putte Continued page 51 posal have opinion other rule change proposals get off apathy write district Board member recent contest several us talking Don Lowe about what wed like see way competition among top-level national international group RC Aerobatic Pattern fliers consensus wed have everyone fly same airplane wed prevent judges knowing identity flier Wouldnt great carefully-nurtured halos would worthless everyone would have equal chance win basis flying ability alone possible consider such com petition thought kicked around few ideas about obvious place start airplane must capable performing FAI pattern well hands superior pilots thought Hobby Shack Supra Fly 1 50 Model Aviation excellent candidate especially YS engine flies FAI pattern extremely well Since ARF Almost Ready Fly flying charac teristics likely consistent aircraft aircraft arent cheap event like would need major sponsor obviously things would have considered before fair test piloting ability would possible such setup wouldnt great watch best country/world compete nobody un fair advantage/liability Ron Van Pune 111 Sleepy Oaks Rd Ft Wal ton Beach FL 32548 RC Scale/Wischers Continued page 53 calculations indicated about 236 oz per sq ft model actually 259 Everything indi cated would good flying model always pleasantly surprised after model finished closely agrees mathe matical projection Estimated values quickly acquiredand just quickly discarded fall outside expectations Control weight during design construction difficult tasks scratchbuilder Having made some calculations deter estimated wing loading example builder now faced serious problem selecting material placement strengthening structural members avoid exceeding desired maximum weight choice made has always strict policy choose lighter material grounds crashed model will have come apart badly regardless built-in strengthening Wide variations strength also avoided example strong fuselage can survive bad landing due stall weak wing structure shattered stall occurred result overweight condi tion heavy fuselage may well have contributing factor cant build protection against pilot error As preferred construction method weight reduction ease building Scale mod eling must come conclusion dont have fact no two models have built alike duplicating older model wings open structure com mon framework leading edge trailing edge spars ribs has variations new Douglas Mailplane has solid-balsaplank leading edges partially shaped circular saw minimize carving sanding afterward Advantage No spars near leading edge spar near trailing edge good airfoil shape retention Disadvantage style construction expensive could con tribute heavy weight unless special care taken selecting light balsa solid leading edges wings completely sheet-covered have tried foam well conventional rib construction found no appreciable difference final weight strength building time electronic calculator has taken sweat out plotting airfoils tapered wings dozen rib positions Starting Handbook Airfoil Sections Light Aircraft MS Rice airfoil can plotted drawn size matter minutes repetition tapered wing rib positions may become monotonous no worse cutting later balsa sheet Some older Scale models non-scale airfoils seem fly just well later ones true scale shapes Maintaining true airfoil shape fabric-covered wings partially successful due fabric sag between ribs both models full-size planes good reason use scale airfoil appearance de pends upon critical eye viewer use Scale airfoil shapes probably has greater effect flight larger models flat-bottomed airfoil may acceptable Schoolyard Scale would hesitate use small Pylon Racer Building fuselage meet low weight projec tions becomes less difficult model size creases Its small model suffers too-high wing loading Building excess strength fuselage temptation re sisted After bad landing strong fuselage merely has larger pieces summarize scratch-designer can make some fairly accurate estimates design parame ters doubt concerning engine size choose larger displacement take advantage using larger-diameter propellers engine exhaust will less noisy prop will efficient because its tips will working outside cowl front-face area fuel consumption should reduced have no problems over heating large slow-turning props engines seem wear forever Excessive engine wear can traced overheating due lean needle settings inadequate ventilation conditions can exist regardless prop size larger prop may scale diame ter appearance definitely improved scratch-builder has positive control over center-of-gravity location Light balsa aft fuselage tail surfaces can help move all-important balance point comfortable 25% position wing chord first flights Having early estimate total weight observing nose tail moments can definite aid material selection Bob Dolly Wiseher 5-22 1 Lapham Peak Rd Delafleld WI 53018 RC Old-Timers/Mathews Continued page 55 kitted after war Scorpion rate very attractive design available version difficult wing construction size suitable 25-size two-cycle engines 30/40 four-strokers span 66 thereabouts making anything bigger excessive Although writer has never seen Ben Buckle kit certainly several interesting designs line Id appreciate hearing com ments have built Buckle kits lament lost skills David Evans letter mentions 24-year-old working PhD English literature University Virginia Some favorite RC memories spring building flying both Quaker 54 Air Trails Sportster teenager Both flew beautifully old 05 15 surprises somewhat few young people build fly Old-Timers satisfaction great hottest hotshots seem really love putting around sky Powerhouse some such Perhaps immediate generation last came model aviation directly through Comet Guil lows rubber kitswhich make transition stick-built Oldies pretty easy Bill Northrop Model Builder Maga zine has often expressed same concerns GATOR RIC PRODUCTS TIGER TAIL 45 DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offl balsa kit machined wood parts complete hardware package includes plug-in adjustable stab parts new wing mounts Wing Span -72 inWing Area 860 sq complete Delux KitS 15995 PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass filled nylon adjusters included provide micro screw adjustment smaller front tube Main tube aluminum matching phenolic socket TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick rngle s5ck transmitters Brown ather grain aluminum trim locking clasp S 1895 WING TUBE & SOCKETS Aluminum alloy tubing plug-In wings Included pair special slip-fit phenolic sockets build wing structure Now size models 718 diax2t 895 diax25 995 1 diax352495 feather Ilte glass cloth 7 ozlsq yd est weave Fastest Filling est Finished Weight Big 3 Sq Yard Pkg Detailed Instructions 5895 ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily out damage new 60s 17MM rear bearings Sleeve Puller5 795 Searing Puller5 695 ForS1395 IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure wJfl aileron elevator rudder throw Takes guess work out trimming out airplane quality tool complete instrtatkons log book tarrying caseS 795 NEWI WING MOUTifING SET wing mounting system developed Ron chidgey fast neat accurate stays tight Three nylon brackets screws machined wood wing blocks included 5595 See Dealer Order Direct Include S2 Per item UPS GATOR RIC PRODUCTS 3713 Pompano Dr acola Pt 32514 1 476-8639 July1987 151
Edition: Model Aviation - 1987/07
Page Numbers: 50, 51, 150, 151
Radio Control Sport Aerobatics Ron Van Putte HERE S scenano try out s contest contestants supposed run end hallway other end penalized time touch wall Sound reasonable Oh almost forgotthey blindfolded cant see walls Does still sound reasonable should contestant penalized touches wall cant see Thats rules Now try scenario Theres RC Pattern event called Turnaround contestants penalized whenever airplane flies out box limits box marked judges can see problem pilots cant see Consequently being penalized flying out box cant see Does above sound ridiculous saw hap pen recent contest out-of-box markers very small placed against backdrop small trees pilots could see unless took eyes off airplanes box judge yes judge sole job determine airplane left box sitting behind pilot Consequently airplane could have according pilots view out judges view Compound fact close encounter box limits judged out have bunch frustrated pilots Im enforcing box Turnaround competition seems limits box must marked both pilots judges can see marginal ap proach box limit should called judge front pilot rules proposal combine Expert Master classes Open class has met uniform acceptance surprisingly representa tives parts country high concentration Master class competitors dont want proposal pass arguments can summarized excerpts article Peter Callas Steve McCann NSRCA District 7 co vice-presidents wrote K-Factor news letter National Society Radio Control Aerobatics NSRCA both Californians lot activity Master class Heres some what say have hashed over reasons AMA Masters Expert classes should joined new Open class pattern simplified pattern put place obviously lot serious Master fliers District 7 little concern powers other parts coun try certain areas country have heard comments about no low ExpertlMasters turn outs contests Does mean should eliminate Expert Masters combine District 7 few years ago very 50 Model Aviation Bob Hanson Niceville FL loads beans cup mounted entry Bean Fly event Eglin Aero Modelers Fun Fly cup still held 10 beans after takeoff loop roll landing completed 4 mean youve never heard about fuel injection Actually Van Putte plugs end fuel tank presurizatlon line onto glow plug confirm has refilled tank engine cant started until pipe-pressure tubing has removed glow plug reattached pressure nipple pipe about having Pattern event ail 0 best Iiers country orthe worlal fly airplaneand theres screen between pilot judges Hobby Shack Supra-Fly would make good candidate forthe plane used Theres discussion about concept Rons column month low turnouts FAI never heard us suggest ing eliminate FAI though low tumouts FAI offered contest run district would really appreciate everybody writing AMA Contest Board member expres sing opinions following paragraph excerpt December issue K-Factor think outlines some points merit concerning rule proposal would combine Expert Master class current class system should stay exactly way progressions vital improvement flying skills flier jump Advanced Master class too large jump Typically Expert class flier learns truly trim airplane fly properly Out West Coast quality Master class flying am sure other areas country second dedication commitment fliers rivals Master flier decides participate FAI team-selection process has trimming flying knowledge make smooth suc cessful transition current top FAI fliers master fliers flew Expert Masters learned about flying trimming classes Some proponents all-FAI-class Pattern think quality FAI flier would improve fliers came up through FAI-type classes None top fliers came IMAC FAI-style flying Id like see Pattern continue grow like has quality flying continue [to improve] way has thats believe elimi nating AMA-type Pattern combining Expert Masters step backwards entire sport Read rules proposals AMA magazine read carefully please take five minutes time 22 cents write Contest Board member names addresses listed AMA magazine First clarify item AMA maga zine called Model Aviation rules pro posals have published discussed sev eral its back issues Rules proposals December 1986 January-February 1987 issues RMcM Second dont agree combination Expert Masters end world isnt step backward am Expert class com petitor dont exactly relish idea being clobbered Master class pilots contests Id probably live through However thing would convince would good idea combine classes would Beginners FAI class also created ease transition between AMA FAI styles flying transition class would provide real competition among competitors new turnaround embar rassment being clobbered initially FAI pros Whether viable option cur rent rules cycle dont know However isnt highlights issues critics current system rules change citelack flexi bility permitted Contest Board members Ive talked extensively about rules change proposals John Fuqua District 5 RC Aerobatics Contest Board member per plexed apathy hes discovering issue combining Expert Master classes has received no written feedback District 5 members subject wrote him letter opposing proposal could say dis trict unanimous its opposition proContinued page 150 SCALE RADIO CONTROL WH CONTROL-UNE FREE-FLIGHT 411000 VINTAGESMOOTHGOLDEN AGENEW sizes21/2CONTOURsizes214BALLOON 31/~%234 343/2 1334134133421441/2 11443/i114311443/2314514 11/2511/241411/25334 1/65/a214514l7/61/2 SCALE PILOTS CYLINDERS ENGINE KITS MACHINE GUN KITS PLASTIC DISPLAY MODELS [JLLAJ Send $2 fully illustrated catalog other kits accessodes DEPT MA PAWNEE ST SAN MARCOS CA 9 Juiy 1987 51 rSOUTHERN PRO RETRACTS SERVOFormerly ACTUATEDPRO-LINE FORand RELIABILITYSOUTHERN R/C SEE YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 LAYHIGH RD HAMILTON 01-I 45013 513 738-1576 IF THE RADIO WORKS THE LANDING GEAR WORKS IF THE RADIO DOESNT WORK IT DOESNT AlA TTER Send 50g aSASEIo Internationai Rd AIONA%a00vpcr Mt View CA t951tAenOan ns e na00Set el anna0 non-,oaeaeC,n MOW POP PlC em 0a Oa and2oneu0p0O~0 BUMBLE VEE FLYING FUN 2 super little sport plane Bumble Vee designed 05 electric power Fast building different looking great flying Bumble Vee pure fun fl PROIUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 organization called Vintage Sailplane Association dedicated preservation flying antique Gliders national publication called Bungee Cord VSA really good source documentation vin tage Sailplanes have first-class archivist person Mr Lee Buell 13507 Brightfield Lane Hemdon VA 22071 Data available VSA members also nonmembers Builders should check Lee subjects available prices can tell wealth information hand last can document some strange birds have eager try couldnt find proof-of-scale would urge Scale fans contact Lee Jan Scott Scott Airpark Lovettsville VA 22080 get membership information wonderful orga nization Membership very inexpensive efforts quite genuine As said above membership required have access material what nice way say Thank plus receive Bungee Cord guess would too out character mention passing have signed editor Model Soaring column Bungee Cord Since Bungee Cord full-scale publica tion consider quite honor will try very hard keep interesting What means reach Level V following piece Mike Hickman Pikes Peak Soaring Societys newsletter Randy Randy Reynolds clubs newsletter editor resident hyper person Hope enjoy did quite some time now Randy has after write article club newsletter about what means feels like reach Level V League Silent Flights Sodring Ac complishment Program Ive sat down now several different occasions write task much difficult ever imag ined Its sort like trying talk about close friend has just passed away five years goal reaching Level V seemed control move made Soaring day finally reached goal swallowed left huge vacuum left goal properly place perspective need know something about LSF Program help have included copy also includes summary require ments level take moment study requirements quickly obvious start quite simple tasks progres sively increase difficulty started flying Sailplanes August 81 1 like other newcomers sport could get plane up lucky enough stumble thermal might get 10- 15-minute flight wasnt until flew first contest hooked both competition camaraderie same time humbled little knew about didnt take much see rate going sure wouldnt winning contests make long story short found out about LSF program immediately apparent tool needed program didnt have worry about first goal having to win contests would come later now con centrate requirements Level I just make couple five-minute flights learn land reasonably close spot ground Now wasnt too bad Bring Level II Now landings get touch demanding have start flying contests wait dont seem intimidating now Could possibly due Level landing practice sessions point LSF program allows follow well-thought-out series goals leading ever-improving flying skills goal close enough reasonably dedicated individual should able reach result will will start win will eventually find yourself starting work Level V voucher As have already mentioned once com pleted requirements Level V seemed though loss what should next other activities directed toward completing requirements now sud denly found myself goal What let down Well folks its taken six months now now have new goalF3B also have new enthusiasm knows what may next Lets see now next team selection 7? See field Thanks story Mikea very persuasive testimonial value LSF program deed really no reason Sailplaners should participate League Silent Flight improve flying its fun best its practicallyfree get started send name address also enclose five stamps LSF PO Box 647 Mundelein IL 60060 will get back Level voucher full descrip tion program National Soaring Societys 1987 Soar-In Contests will held around country between June 1 July 26 idea have similar contest clubs roughly same time have fun spread word about NSS Marshall Long Texas taking over Dick Crowley Soar-In Coordinator year time read AMA sanctions should set check Contest Calendar magazine Soar-In closest SOARs Scale Uprising coming up August 1 2 original dates July II 12 switched because near-conflict Nats promises biggest all-Scale Soaring event held country Contest Coor dinator Steve Moskal provided details August 1AMA Sport Scale six classes see AMA rule book August 1-2Thermal Duration six classes Ships must have flown AMA Sport Scale In/out 100-ft-diameter circle 20 landing bonus points Duration will five 10 minutes de pending weatherwith objective seven eight rounds flown two days Straight scoring will used no points Sport Scale Electric-motor Gliders will judged flown same above will no limit motor run number charges Byron Blakeslee 3134 Winnebago Dr Se dalia CO 80135 RC Aerobatics/Van Putte Continued page 51 posal have opinion other rule change proposals get off apathy write district Board member recent contest several us talking Don Lowe about what wed like see way competition among top-level national international group RC Aerobatic Pattern fliers consensus wed have everyone fly same airplane wed prevent judges knowing identity flier Wouldnt great carefully-nurtured halos would worthless everyone would have equal chance win basis flying ability alone possible consider such com petition thought kicked around few ideas about obvious place start airplane must capable performing FAI pattern well hands superior pilots thought Hobby Shack Supra Fly 1 50 Model Aviation excellent candidate especially YS engine flies FAI pattern extremely well Since ARF Almost Ready Fly flying charac teristics likely consistent aircraft aircraft arent cheap event like would need major sponsor obviously things would have considered before fair test piloting ability would possible such setup wouldnt great watch best country/world compete nobody un fair advantage/liability Ron Van Pune 111 Sleepy Oaks Rd Ft Wal ton Beach FL 32548 RC Scale/Wischers Continued page 53 calculations indicated about 236 oz per sq ft model actually 259 Everything indi cated would good flying model always pleasantly surprised after model finished closely agrees mathe matical projection Estimated values quickly acquiredand just quickly discarded fall outside expectations Control weight during design construction difficult tasks scratchbuilder Having made some calculations deter estimated wing loading example builder now faced serious problem selecting material placement strengthening structural members avoid exceeding desired maximum weight choice made has always strict policy choose lighter material grounds crashed model will have come apart badly regardless built-in strengthening Wide variations strength also avoided example strong fuselage can survive bad landing due stall weak wing structure shattered stall occurred result overweight condi tion heavy fuselage may well have contributing factor cant build protection against pilot error As preferred construction method weight reduction ease building Scale mod eling must come conclusion dont have fact no two models have built alike duplicating older model wings open structure com mon framework leading edge trailing edge spars ribs has variations new Douglas Mailplane has solid-balsaplank leading edges partially shaped circular saw minimize carving sanding afterward Advantage No spars near leading edge spar near trailing edge good airfoil shape retention Disadvantage style construction expensive could con tribute heavy weight unless special care taken selecting light balsa solid leading edges wings completely sheet-covered have tried foam well conventional rib construction found no appreciable difference final weight strength building time electronic calculator has taken sweat out plotting airfoils tapered wings dozen rib positions Starting Handbook Airfoil Sections Light Aircraft MS Rice airfoil can plotted drawn size matter minutes repetition tapered wing rib positions may become monotonous no worse cutting later balsa sheet Some older Scale models non-scale airfoils seem fly just well later ones true scale shapes Maintaining true airfoil shape fabric-covered wings partially successful due fabric sag between ribs both models full-size planes good reason use scale airfoil appearance de pends upon critical eye viewer use Scale airfoil shapes probably has greater effect flight larger models flat-bottomed airfoil may acceptable Schoolyard Scale would hesitate use small Pylon Racer Building fuselage meet low weight projec tions becomes less difficult model size creases Its small model suffers too-high wing loading Building excess strength fuselage temptation re sisted After bad landing strong fuselage merely has larger pieces summarize scratch-designer can make some fairly accurate estimates design parame ters doubt concerning engine size choose larger displacement take advantage using larger-diameter propellers engine exhaust will less noisy prop will efficient because its tips will working outside cowl front-face area fuel consumption should reduced have no problems over heating large slow-turning props engines seem wear forever Excessive engine wear can traced overheating due lean needle settings inadequate ventilation conditions can exist regardless prop size larger prop may scale diame ter appearance definitely improved scratch-builder has positive control over center-of-gravity location Light balsa aft fuselage tail surfaces can help move all-important balance point comfortable 25% position wing chord first flights Having early estimate total weight observing nose tail moments can definite aid material selection Bob Dolly Wiseher 5-22 1 Lapham Peak Rd Delafleld WI 53018 RC Old-Timers/Mathews Continued page 55 kitted after war Scorpion rate very attractive design available version difficult wing construction size suitable 25-size two-cycle engines 30/40 four-strokers span 66 thereabouts making anything bigger excessive Although writer has never seen Ben Buckle kit certainly several interesting designs line Id appreciate hearing com ments have built Buckle kits lament lost skills David Evans letter mentions 24-year-old working PhD English literature University Virginia Some favorite RC memories spring building flying both Quaker 54 Air Trails Sportster teenager Both flew beautifully old 05 15 surprises somewhat few young people build fly Old-Timers satisfaction great hottest hotshots seem really love putting around sky Powerhouse some such Perhaps immediate generation last came model aviation directly through Comet Guil lows rubber kitswhich make transition stick-built Oldies pretty easy Bill Northrop Model Builder Maga zine has often expressed same concerns GATOR RIC PRODUCTS TIGER TAIL 45 DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offl balsa kit machined wood parts complete hardware package includes plug-in adjustable stab parts new wing mounts Wing Span -72 inWing Area 860 sq complete Delux KitS 15995 PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass filled nylon adjusters included provide micro screw adjustment smaller front tube Main tube aluminum matching phenolic socket TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick rngle s5ck transmitters Brown ather grain aluminum trim locking clasp S 1895 WING TUBE & SOCKETS Aluminum alloy tubing plug-In wings Included pair special slip-fit phenolic sockets build wing structure Now size models 718 diax2t 895 diax25 995 1 diax352495 feather Ilte glass cloth 7 ozlsq yd est weave Fastest Filling est Finished Weight Big 3 Sq Yard Pkg Detailed Instructions 5895 ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily out damage new 60s 17MM rear bearings Sleeve Puller5 795 Searing Puller5 695 ForS1395 IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure wJfl aileron elevator rudder throw Takes guess work out trimming out airplane quality tool complete instrtatkons log book tarrying caseS 795 NEWI WING MOUTifING SET wing mounting system developed Ron chidgey fast neat accurate stays tight Three nylon brackets screws machined wood wing blocks included 5595 See Dealer Order Direct Include S2 Per item UPS GATOR RIC PRODUCTS 3713 Pompano Dr acola Pt 32514 1 476-8639 July1987 151