Free Flight: Duration

Free Flight DURA TION Bob Meuser MORE THAN ever wanted know about gussets Gussets teeny-weeny balsa triangles glued corners between Part Part B Without glue joints Free Flight structures weakest parts isnt necesssarily bad gussets glue required hold weigh bit adding full com plement gussets can easily double triple time required build models framework Without gussets often crushing wood joint caused shrinkage force exerted covering promotes unsightly crows-foot wrinkles covering joints Avoiding wrinkles might ensure winning contests might make lot happier about losing typical application gussets otherwise-weak joints between ribs trail ing edge wing Other solutions available see December 1981 issue page 61but gussets popular effective conventional wisdom grain should run parallel diagonal edge gusset shown best sketch although Id argue good bit good best application poor whole lot better no gusset best gussets easy make install others proper tooling argue simple homebrew mini-miter-box razor saw tooling need simplest miter box has merely cut 450 using cut gussets requires flipping stock bottom-up after cut intolerable nuisance find Two cuts opposed 450 angles avoid third cut straight across bound come handy something other Some modelers make distance between guides exactly equal width balsa stock requires different miter box gusset size find no problem groove much wider stock system gives equal-leg 450 gussets some circlesespecially Nordic Glider circles ----it height fashion use gussets unequal legs Whether thats worth trouble weightdepends what expect out poor little gusset its place life merely strengthen rib-to-TE joint making side glued rib longer simply adds useless weight gusset supposed strengthen rib bit thinnest weakest perhaps added weight pays its way Unequalleg gussets can hacked Out miter box guide cuts angled bit still exactly 900 apart Well luck would have after writing above doing first set sketches bumbled another scheme worthy mention shown final sketch heart system metal plate 900 corner used Jim Walson shows off Wild Gooser Gas design frequent winner FF meets Model featured March 82 issue NFFS newsletter Free Flight Plans available NFFS see column 64 Model Aviation II Maestro George X Perryman finally got hang building fuselages straight used Outdoor Helicopter rubber model Outdoor Helicopter official AMA FAI event both Russia Italy currently contend World Records Photo Larry Kruse John Warner launches PeckPolymers Night 28 P30class model Taft CA meet helped him earn trophy A5OUT QUSSE T5 cuts K hIZ BOX ii 24ood fl-v Poor BLock ho1diri viE pattern Ah Gussetts What would Some modelers wonder what ith Bob expounds sub ject month Sketch left shows typical installation pointers right shows nice bit production toolinguse help ease pain guide hobby knife although should work razor saw well metal triangle secured base desired angle thumbscrew unequal-leg gussets no sweat thick should gussets bit thinner thick edge TE gussets glued flush bottom surface wing Must gusset side rib Certainly can say reasonable certainty gussets both sides will make joint twice strong add twice much weight require twice time cut install gusset just side believe Wild Gooser plans available Plans Jim Walstons outstanding Class Gas model featured Ralph Preys story March issue Free Flight NFFS Digest now avail able NFFS Plans Publications 4858 Moorpark Ave San Jose CA 95129 Price S5 plus $1 P H model performs just fine less-expensive 15 cu engines Cox ID 15 Supertigre 15 Fox 15 OS Max 15 Cox ID 09 Cox Medallion 15 will pretty well brand new in-the-box Fox 15 baffle-piston engine will set back mere $1750 plus $3 shipping per order order Ron St Jean 3744 East Nye Lane Carson City NV 89701 might want squeeze some other stuff order take advantage per order shipping charge might pay send SASE first catalog Ribless construction re-re-visited Back February 1980 column described what called ribless wing constnlction have presented variations theme frequently times since has come attention form construction appeared print perhaps first time article Clarence Mather appeared July 1976 issue Model Aviation like think circumstance just demonstrates great mindsmine Matherstend run same rut Id ever delighted someone would point out same idea appeared mid-Thirties edition Zaics Yearbook perhaps paper Bert Einstein along about 1911 New life old decals Ever have old decal boijnued page 130 June 198265 7-/i 4j I Best want diff cult use gussets unequal leg lengths easily-constructed cutting jig makes problem snap Triangle metal Denis Ferrero member French PAl Power team prepares launch distinctive ellip tical-dihedral model Thats KerKorb castle background. some class Atthe US Taft CA site weve got Kitty Litter plant Photo Frugoli OR Propeller new wood blades have phenolic coating extra stiffness makes propeller stiffer stronger yet thinner best efficiency 24 x 9 Propeller $20 HARDER STIFFER Other sizes will soon available AT YOUR DEALER GRISH BROS ST JOHN INO 46373 Perfect AA control line leadout eyelet 3/32in hole cement its flange plywood high-viscosity cyanoacrylates fiveminute epoxy Cut straight pin point length will project about 1/32-in overthe edge disc radial orientation same cement acts DT release Clean roughen winding shaft piece sandpaper needle file slip disc assembly 005 010-in shim single-edge razor blade works between flange eyelet top timer Cement eyelet shaft being sure dont let cement run down bearing use hi-vis cement Push original plastic winding knob down shaft until bottoms end eyelet Cut off protruding shaft file flush top winding knob Remove shim com pletes timer timer powered rubberband remem ber removed spring Typically rubberband made Win loop 030-050 Indoor rubber hooked over projecting end straight pin disc timer rubber stretched about twice its normal length position string DT fastened other end rubberband rubber wound around shaft eyelet twisting winding knob allowing rubber climb shaft time deter mined number turns nature rubberband used reason disc very little torque required run timer lot needed get clean release pin Therefore last half-turn timer made run higher rate torque get clean release life expectancy timer really known point prototype has run over 100 cycles room temperature clean con ditions no apparent wear timing change timers used Texas Nats no temperature problems certainly will least sensitive dust dirt Seelig Tatone dont use lubricants seal welL timer protection mounted pocket airplane sure seal interior balsa dust doesnt find its way gears Scotch Magic Tape can used cover outside face timer piece typing paper should cut fit over part covers ends shafts goo tape wont get bearings now making vacuum-formed cups timers mounted photos show timer mounted nose Mike Stoys Wasp MA plan No 343 Don Lindley prefers mount timer wing using finger rest falring get necessary depth shown picture Max Flyer case have number choices timer consider gadget perfected finished product simply reasonable plateau development program therefore worth noting hoped others will pick up go ahead other improvements mechanics techniques make item usefuL FF Duration/Meuser Con finued page 65 crumble mini-comfiakes put through water-soak routine Thats abso lute disaster irreplaceable rare Old-Timer kit According ModelAviation 130 Model Aviation LARGE Plasticote LIGHTER 1GLOW lireb PLUGS 0 Blow Proof Seal OSix Types in3 Heat Ranges S Longer Life 0 Flash Starting Only $120 SWANSON PO Box 151Since 7948 Wayne NJ 07470 SILK ~" DISCOUNTS ON $ 50 YD ROLLS495/YD RedYellow Royal Ukie Fine Quality Model Building AlyLenghMoii5OYd SILK COVERS 8EST LIGHT- STRONG- ECONOMICAL SHIPPING ADO 50 FOREIGN 150/ ORDER l RES Add 4% 8ROWNSELL FLAG & DECAL CO 121 LAUREL ROAD NEW CITY NY 914-634-850010956 Canada Jack Mertes has solution Brush coat clear urethane varnish over decal first holds decal together fuel-proofs boot Ron throws sponge April 1979 column ran item Ron St Jeans virtually all-foam construction method Since time hes running ad NFFS Digest under name Structureless Foam Composites Ron has worked Out technique viable alternative traditional expensive timeconsuming stick-and-tissue construction methods has proved models built using methods can survive rigors competition flying bring home trophies would think Free Flighters would beating doors down didnt happen Response NEES Digest ad has disappointing Recently Ron told kill ad Digest Ron gave idea fair throw isnt big flogging dead horses Recently ModelAviation April 1982 page 50 Rons full-length article appeared print doesnt stir up some interest within traditionally ultra-conservative community nothing wilL Im going run Rons ad few issues Digest NFFS expense call editors privilege still nothing happens thats end Free Flight doesnt have winners going can afford flush down demonstrably potential through neglect dont have access back issues Model Aviation want copy Rons article send SASE want information Ron write him enclose SASE 3744 East Nye Lane Carson City NV 89701 sub-Nats West Baden now hope youll have seen gory details Competi tion Newsletter catalog item reminder Anyhow Hardy Brodersen NFFS executive director tells three-day events Indoor contest will take place West Baden IN June 14 15 16 immediately pre cedes traditional NIMAS Records Trials immediately precedes nowtraditional Indoor Peanut Scale Gran Prix Events will include standard ones AMA rule book plus ofthe others Formula Manhat tan Bostonian East West Peanut Scale racing etc Coming going amounts solid two weeks Indoor Indoor Scale related activities such getting point point B perhaps dropping good old Aunt Minnie bless black little heart Continued Now Can Watch R/C Helicopter Flying Own Home Club Hobby Store GMP has produced video tape showing aspects R/C Helicopter flying Will See Beginners buying building & flying * Crickets flown beginners experts off land water Flying new GMP Hughes 300C Flying new Competitors fantastic Hirobo Scale Ranger static flying GMP helicopter factory facilitiesmanufacturing product support professionally produced tape full color sound Fixed wing & heli flyers say gives goose pimples Competitor kits available now Hughes 300C available month Discounts 40% off list prices Nearly 1000 titles around world Two Simple requirements 1 A single check covering order 2 One ship-to address Free catalog discount info & detads ZENITH AVIATION BOOKS North Branch MN 55056/61 2 583-2573 JUST PUBLISHED Available Group Discount ThERE ARE NO SECRETS Higlee Model finishing techniques oras tel 314 photos chap tern Iron-On toveriogs Paint Problems tofu Paints Sealein Fillers Primers Brushes & Brush ing FilleD & tunopes Paint Contents & Drying etc 83 pgs softbound 215535$955 SIMPLICITYELECTRIC CONTROL LINE r t AVAILABLE ONLY FROM ELECTROLINE MODELS PO BOX 2503 BEVERLY HILLS CA 90213 June 1982131 Send $3000 tape shipping Please specify VHS Beta format decide return tape simply send undamaged R/C Helicopters cassette us UPS w/in 30 days full prompt refund Overseas inquiries please send $4000 nonrefundable State VHS BetaPAL Secam NTSC format AVIATION BOOKS AT DISCOUNTS New Group Discount Plan Zenith Aviation Books Conveniently slip battery pack onto belt fly just push button control stick Thats easy Fly 20 minutes Re charge battery youre set go again Thats simple free brochure models accessories write us today 4 NOT JUST ANOTHER CATALOG novice tips experts expert thousands products specifica tions photos help decide make hobby enjoyable everybody interested R/C its standard reference book Will Ever Need Available through local hobby shop use coupon [v32][b-1-10-1-10]]I Yes send copy new RADIO CONTROL BUYERS GUIDE K] Enclosed $950 $795 plus $1 55 postage us & canada dians send US funds VA residents add 4% sales tax charge myMastercharge Li visa charge No________________________ Exp Date _________________ Name Street city State Zip Return Boynton & Associates Inc clifton House clifton virginia 22024 II KITTY HAWK MODELS RR 2 PAOLI IN 47454 PH 812 723-3601 723-3488 SENDFOR cOMPLETE CATALOG $100 Wholesale & Dealer Inquiries Invited Die goddamung Flamingo-Profilen revisited name flamingo airfoil must have cobbled up some press agent no flamingo other Gods creatures ever such airfoil Some sketches literature show indentation lower surface just behind LE hawks eagleslong-dead ones per haps live ones leading-edge flap used Les DeWitts Iconoclast Wakefield NEES Symposium Report 1979 might work something like Seredinsky foiL Bill Bogart points out Seredinsky Flamingo Airfoil discussed December 1981 issue appeared model aviation liter ature least early 1953 ModelAirplane News October 1953 p 17 Herman Andresen fussed around Sere dinsky-type foils back Sixties appli cation Nordic Glider 10-ft span aspect ratio 30 goal aGliderthat would true safe 3 mm still air fell second two short abandoned bad though non-zoom launch AR 30 probably far beyond optimum also used such foil succession low-ceiling Indoor Hand-Launch Gliders final series 28-in span 100 sq wing area weighed ym 27-ft ceiling Phoenixs 1200-ft altitude could tick off 39 sec Outdoors night 42 44 sec bad non-reinforced non-flapper flown oldtimer non-arm says guess Bob Norton Bakersfield CA dredged up some early applications collection Aero Modeller mags Kekkonens Patti A-i Glider January 1965 issue accompanying article included note bird-like section has used considerable success other experts other J M Berthes Super-Flamingo A-2 GliderFebruary 1969 note has employed mixed degrees success years appears have originated Austria though present-day expo nents France Next Ill probably hear Seredinsky actually copped idea twin-pusher model saw 1927 Bob Meuser 4200 Gregory St Oakland CA 94619 FF Scale/Warner Continued page 66 nose length less down side thrust needed change flight characteristics make Sopwith Pup fly wide left turn under power takes about three degrees right thrust added four degrees down Pup alltime champ short-nose-moment depart ment prop just clearing leading edge wing Stinson SM-2 Junior longer nose does same thing two degrees down two degrees right owing greater distance back CG Just make things interesting high-wing plane will need downthrust will low-winger due placement thrust line relation wing Know engine often hear engines hard start Nine times out 10 owner opinion did take trouble benchrun engine before installing plane Always run new engine test stand until know its little tricks believe have will take least 10 minutes running time break parts learn needle valve setting case diesel range compression-bar setting After engine installed plane run again see 1 32 Model Aviation Hobby & Craft M

Free Flight DURA TION Bob Meuser MORE THAN ever wanted know about gussets Gussets teeny-weeny balsa triangles glued corners between Part Part B Without glue joints Free Flight structures weakest parts isnt necesssarily bad gussets glue required hold weigh bit adding full com plement gussets can easily double triple time required build models framework Without gussets often crushing wood joint caused shrinkage force exerted covering promotes unsightly crows-foot wrinkles covering joints Avoiding wrinkles might ensure winning contests might make lot happier about losing typical application gussets otherwise-weak joints between ribs trail ing edge wing Other solutions available see December 1981 issue page 61but gussets popular effective conventional wisdom grain should run parallel diagonal edge gusset shown best sketch although Id argue good bit good best application poor whole lot better no gusset best gussets easy make install others proper tooling argue simple homebrew mini-miter-box razor saw tooling need simplest miter box has merely cut 450 using cut gussets requires flipping stock bottom-up after cut intolerable nuisance find Two cuts opposed 450 angles avoid third cut straight across bound come handy something other Some modelers make distance between guides exactly equal width balsa stock requires different miter box gusset size find no problem groove much wider stock system gives equal-leg 450 gussets some circlesespecially Nordic Glider circles ----it height fashion use gussets unequal legs Whether thats worth trouble weightdepends what expect out poor little gusset its place life merely strengthen rib-to-TE joint making side glued rib longer simply adds useless weight gusset supposed strengthen rib bit thinnest weakest perhaps added weight pays its way Unequalleg gussets can hacked Out miter box guide cuts angled bit still exactly 900 apart Well luck would have after writing above doing first set sketches bumbled another scheme worthy mention shown final sketch heart system metal plate 900 corner used Jim Walson shows off Wild Gooser Gas design frequent winner FF meets Model featured March 82 issue NFFS newsletter Free Flight Plans available NFFS see column 64 Model Aviation II Maestro George X Perryman finally got hang building fuselages straight used Outdoor Helicopter rubber model Outdoor Helicopter official AMA FAI event both Russia Italy currently contend World Records Photo Larry Kruse John Warner launches PeckPolymers Night 28 P30class model Taft CA meet helped him earn trophy A5OUT QUSSE T5 cuts K hIZ BOX ii 24ood fl-v Poor BLock ho1diri viE pattern Ah Gussetts What would Some modelers wonder what ith Bob expounds sub ject month Sketch left shows typical installation pointers right shows nice bit production toolinguse help ease pain guide hobby knife although should work razor saw well metal triangle secured base desired angle thumbscrew unequal-leg gussets no sweat thick should gussets bit thinner thick edge TE gussets glued flush bottom surface wing Must gusset side rib Certainly can say reasonable certainty gussets both sides will make joint twice strong add twice much weight require twice time cut install gusset just side believe Wild Gooser plans available Plans Jim Walstons outstanding Class Gas model featured Ralph Preys story March issue Free Flight NFFS Digest now avail able NFFS Plans Publications 4858 Moorpark Ave San Jose CA 95129 Price S5 plus $1 P H model performs just fine less-expensive 15 cu engines Cox ID 15 Supertigre 15 Fox 15 OS Max 15 Cox ID 09 Cox Medallion 15 will pretty well brand new in-the-box Fox 15 baffle-piston engine will set back mere $1750 plus $3 shipping per order order Ron St Jean 3744 East Nye Lane Carson City NV 89701 might want squeeze some other stuff order take advantage per order shipping charge might pay send SASE first catalog Ribless construction re-re-visited Back February 1980 column described what called ribless wing constnlction have presented variations theme frequently times since has come attention form construction appeared print perhaps first time article Clarence Mather appeared July 1976 issue Model Aviation like think circumstance just demonstrates great mindsmine Matherstend run same rut Id ever delighted someone would point out same idea appeared mid-Thirties edition Zaics Yearbook perhaps paper Bert Einstein along about 1911 New life old decals Ever have old decal boijnued page 130 June 198265 7-/i 4j I Best want diff cult use gussets unequal leg lengths easily-constructed cutting jig makes problem snap Triangle metal Denis Ferrero member French PAl Power team prepares launch distinctive ellip tical-dihedral model Thats KerKorb castle background. some class Atthe US Taft CA site weve got Kitty Litter plant Photo Frugoli OR Propeller new wood blades have phenolic coating extra stiffness makes propeller stiffer stronger yet thinner best efficiency 24 x 9 Propeller $20 HARDER STIFFER Other sizes will soon available AT YOUR DEALER GRISH BROS ST JOHN INO 46373 Perfect AA control line leadout eyelet 3/32in hole cement its flange plywood high-viscosity cyanoacrylates fiveminute epoxy Cut straight pin point length will project about 1/32-in overthe edge disc radial orientation same cement acts DT release Clean roughen winding shaft piece sandpaper needle file slip disc assembly 005 010-in shim single-edge razor blade works between flange eyelet top timer Cement eyelet shaft being sure dont let cement run down bearing use hi-vis cement Push original plastic winding knob down shaft until bottoms end eyelet Cut off protruding shaft file flush top winding knob Remove shim com pletes timer timer powered rubberband remem ber removed spring Typically rubberband made Win loop 030-050 Indoor rubber hooked over projecting end straight pin disc timer rubber stretched about twice its normal length position string DT fastened other end rubberband rubber wound around shaft eyelet twisting winding knob allowing rubber climb shaft time deter mined number turns nature rubberband used reason disc very little torque required run timer lot needed get clean release pin Therefore last half-turn timer made run higher rate torque get clean release life expectancy timer really known point prototype has run over 100 cycles room temperature clean con ditions no apparent wear timing change timers used Texas Nats no temperature problems certainly will least sensitive dust dirt Seelig Tatone dont use lubricants seal welL timer protection mounted pocket airplane sure seal interior balsa dust doesnt find its way gears Scotch Magic Tape can used cover outside face timer piece typing paper should cut fit over part covers ends shafts goo tape wont get bearings now making vacuum-formed cups timers mounted photos show timer mounted nose Mike Stoys Wasp MA plan No 343 Don Lindley prefers mount timer wing using finger rest falring get necessary depth shown picture Max Flyer case have number choices timer consider gadget perfected finished product simply reasonable plateau development program therefore worth noting hoped others will pick up go ahead other improvements mechanics techniques make item usefuL FF Duration/Meuser Con finued page 65 crumble mini-comfiakes put through water-soak routine Thats abso lute disaster irreplaceable rare Old-Timer kit According ModelAviation 130 Model Aviation LARGE Plasticote LIGHTER 1GLOW lireb PLUGS 0 Blow Proof Seal OSix Types in3 Heat Ranges S Longer Life 0 Flash Starting Only $120 SWANSON PO Box 151Since 7948 Wayne NJ 07470 SILK ~" DISCOUNTS ON $ 50 YD ROLLS495/YD RedYellow Royal Ukie Fine Quality Model Building AlyLenghMoii5OYd SILK COVERS 8EST LIGHT- STRONG- ECONOMICAL SHIPPING ADO 50 FOREIGN 150/ ORDER l RES Add 4% 8ROWNSELL FLAG & DECAL CO 121 LAUREL ROAD NEW CITY NY 914-634-850010956 Canada Jack Mertes has solution Brush coat clear urethane varnish over decal first holds decal together fuel-proofs boot Ron throws sponge April 1979 column ran item Ron St Jeans virtually all-foam construction method Since time hes running ad NFFS Digest under name Structureless Foam Composites Ron has worked Out technique viable alternative traditional expensive timeconsuming stick-and-tissue construction methods has proved models built using methods can survive rigors competition flying bring home trophies would think Free Flighters would beating doors down didnt happen Response NEES Digest ad has disappointing Recently Ron told kill ad Digest Ron gave idea fair throw isnt big flogging dead horses Recently ModelAviation April 1982 page 50 Rons full-length article appeared print doesnt stir up some interest within traditionally ultra-conservative community nothing wilL Im going run Rons ad few issues Digest NFFS expense call editors privilege still nothing happens thats end Free Flight doesnt have winners going can afford flush down demonstrably potential through neglect dont have access back issues Model Aviation want copy Rons article send SASE want information Ron write him enclose SASE 3744 East Nye Lane Carson City NV 89701 sub-Nats West Baden now hope youll have seen gory details Competi tion Newsletter catalog item reminder Anyhow Hardy Brodersen NFFS executive director tells three-day events Indoor contest will take place West Baden IN June 14 15 16 immediately pre cedes traditional NIMAS Records Trials immediately precedes nowtraditional Indoor Peanut Scale Gran Prix Events will include standard ones AMA rule book plus ofthe others Formula Manhat tan Bostonian East West Peanut Scale racing etc Coming going amounts solid two weeks Indoor Indoor Scale related activities such getting point point B perhaps dropping good old Aunt Minnie bless black little heart Continued Now Can Watch R/C Helicopter Flying Own Home Club Hobby Store GMP has produced video tape showing aspects R/C Helicopter flying Will See Beginners buying building & flying * Crickets flown beginners experts off land water Flying new GMP Hughes 300C Flying new Competitors fantastic Hirobo Scale Ranger static flying GMP helicopter factory facilitiesmanufacturing product support professionally produced tape full color sound Fixed wing & heli flyers say gives goose pimples Competitor kits available now Hughes 300C available month Discounts 40% off list prices Nearly 1000 titles around world Two Simple requirements 1 A single check covering order 2 One ship-to address Free catalog discount info & detads ZENITH AVIATION BOOKS North Branch MN 55056/61 2 583-2573 JUST PUBLISHED Available Group Discount ThERE ARE NO SECRETS Higlee Model finishing techniques oras tel 314 photos chap tern Iron-On toveriogs Paint Problems tofu Paints Sealein Fillers Primers Brushes & Brush ing FilleD & tunopes Paint Contents & Drying etc 83 pgs softbound 215535$955 SIMPLICITYELECTRIC CONTROL LINE r t AVAILABLE ONLY FROM ELECTROLINE MODELS PO BOX 2503 BEVERLY HILLS CA 90213 June 1982131 Send $3000 tape shipping Please specify VHS Beta format decide return tape simply send undamaged R/C Helicopters cassette us UPS w/in 30 days full prompt refund Overseas inquiries please send $4000 nonrefundable State VHS BetaPAL Secam NTSC format AVIATION BOOKS AT DISCOUNTS New Group Discount Plan Zenith Aviation Books Conveniently slip battery pack onto belt fly just push button control stick Thats easy Fly 20 minutes Re charge battery youre set go again Thats simple free brochure models accessories write us today 4 NOT JUST ANOTHER CATALOG novice tips experts expert thousands products specifica tions photos help decide make hobby enjoyable everybody interested R/C its standard reference book Will Ever Need Available through local hobby shop use coupon [v32][b-1-10-1-10]]I Yes send copy new RADIO CONTROL BUYERS GUIDE K] Enclosed $950 $795 plus $1 55 postage us & canada dians send US funds VA residents add 4% sales tax charge myMastercharge Li visa charge No________________________ Exp Date _________________ Name Street city State Zip Return Boynton & Associates Inc clifton House clifton virginia 22024 II KITTY HAWK MODELS RR 2 PAOLI IN 47454 PH 812 723-3601 723-3488 SENDFOR cOMPLETE CATALOG $100 Wholesale & Dealer Inquiries Invited Die goddamung Flamingo-Profilen revisited name flamingo airfoil must have cobbled up some press agent no flamingo other Gods creatures ever such airfoil Some sketches literature show indentation lower surface just behind LE hawks eagleslong-dead ones per haps live ones leading-edge flap used Les DeWitts Iconoclast Wakefield NEES Symposium Report 1979 might work something like Seredinsky foiL Bill Bogart points out Seredinsky Flamingo Airfoil discussed December 1981 issue appeared model aviation liter ature least early 1953 ModelAirplane News October 1953 p 17 Herman Andresen fussed around Sere dinsky-type foils back Sixties appli cation Nordic Glider 10-ft span aspect ratio 30 goal aGliderthat would true safe 3 mm still air fell second two short abandoned bad though non-zoom launch AR 30 probably far beyond optimum also used such foil succession low-ceiling Indoor Hand-Launch Gliders final series 28-in span 100 sq wing area weighed ym 27-ft ceiling Phoenixs 1200-ft altitude could tick off 39 sec Outdoors night 42 44 sec bad non-reinforced non-flapper flown oldtimer non-arm says guess Bob Norton Bakersfield CA dredged up some early applications collection Aero Modeller mags Kekkonens Patti A-i Glider January 1965 issue accompanying article included note bird-like section has used considerable success other experts other J M Berthes Super-Flamingo A-2 GliderFebruary 1969 note has employed mixed degrees success years appears have originated Austria though present-day expo nents France Next Ill probably hear Seredinsky actually copped idea twin-pusher model saw 1927 Bob Meuser 4200 Gregory St Oakland CA 94619 FF Scale/Warner Continued page 66 nose length less down side thrust needed change flight characteristics make Sopwith Pup fly wide left turn under power takes about three degrees right thrust added four degrees down Pup alltime champ short-nose-moment depart ment prop just clearing leading edge wing Stinson SM-2 Junior longer nose does same thing two degrees down two degrees right owing greater distance back CG Just make things interesting high-wing plane will need downthrust will low-winger due placement thrust line relation wing Know engine often hear engines hard start Nine times out 10 owner opinion did take trouble benchrun engine before installing plane Always run new engine test stand until know its little tricks believe have will take least 10 minutes running time break parts learn needle valve setting case diesel range compression-bar setting After engine installed plane run again see 1 32 Model Aviation Hobby & Craft M