NFFS NEWS Free Flight Digest official monthly publication National Free Flight Society NFFS has new editor person Chris Weinrich Bob Meuser Model Aviation s Free Flight Duration columnist years also performing editor Redacteur en Chef Digest some 18 yearsand doing admirable job Bob nounced change editorship formal letter various newsletter editors maga zine columnists think should thank Bob past service NFFS wish him well future endeavors Chris Weinrich will henceforth accepting associated correspondence Digest 905 West 5th Ave Olympia WA 98502 Welcome aboard Chris NFFS also has new Membership Chair man Nat Comfort replaced Sal Fruciano January 1990 Sal served about two years volunteer capacity efforts appreciated well Nat enthusiastic East Coast Free Flighter will receiving new membership applica tions 12324 Percival St Chester VA 23831 appears Nat will quite busy year processing sudden upswing new NFFS memberships Free Flighters showing creasing support recent efforts revi talized NFFS understand 60% increase new memberships 1989 lets see can surpassed 1990 annual mem bership fee $15but $750 un der 18 years age havent done yet join renew today As Irish ancestors would say Free Flight Go Bragh Free Flight Forever sad note Carl Fries cofounder NFFS organization left us December 7 1989 age 74 Uncle Carl fondly called formed NFFS along Dick Black 1966/67 time frame sole purpose promoting Free Flight competition talked congenial friendly man Lawrenceville last summer ecstatic over concept NFFS/USOC resultant re sponse signified tremendous turnout con testants interpreted positive show hands beloved Free Flight hobby Lets keep going its great said Now Free Flight mourns friend Farewell God bless Uncle Carl Free Flight Nats week1990 week-long 1990 USOC/AMA Nats Lawrenceville IL mid-October will include NFFS Nostalgia Gas National Champs well two previous NFFS NosGas champs have staged con junction Society Antique Modelers annual SAM Champs first instigated Bob Larsh 1988 SAM Champs Law renceville IL carried through Ralph Prey 89 SAM Champs Jean NV Meanwhile NFFS-sponsored USOC Unit ed States Outdoor Champs concept evolved separate root different reasons its ini tial competition took place June 1989 Nos talgia Gas events carded six events week-long affair package drew amazing number entrants Due success interest con solidating two NFFS activities parties volved have agreed future home NFFS NosGas Champs should hereafter fall un der umbrella annual NFFS-sponsored United States Outdoor Champs possi ble Whereas 1990 NFFS/USOC mar ried Free Flight portion 1990 AMA Nats scheduled mid-October gathering shall now serve biggie event year 74 Model Aviation Free Flight Duration Harry Murphy 3924 Oakwood Blvd Anderson IN 460 I much-traveled model box Dale Mateer Centerville OH shows what takes serious FAI Power competition made aluminum completely lined foam Egotistic golf ers take ball go play Dale former member US FAI FF Power team Photo below shows what both Dale models look like Mark Sexton Bruce Kimball Taft CA Models V2A NosGas renditions Top Banana Ramrod respectively NosGas activity thriving everywhere S Sexton plc Dennis Phillips immaculate Civy Boy 61 covered red silk trimmed opaque light blue won NosGas Class B against 30 other entrants 89 NFFS/USOC meet Lawrenceville IL modelers have built Civy Boys never learned trim successful flights Others can three factions 1990 NosGas Champs schedule will clude six events hA A B C/D Ignition However popular request events will spread over five days competition rather crammed first two days case initial 89 USOC Another revision note awards will presented down roster event winners far eighth place high-entry events least third place events have tra ditionally shown lower levels participation policy will prevail other Rubber Glider Gas events AMA card well USOC manager Jim OReilly has signed Jim Bennett St Louis overall Contest Director week-long fray official dates ing October 16-20 thats Tuesday through Satur day special proclamation has issued full week Indian Summer ideal flying conditions See Some ponderings FF Gas rules still subject NFFS Nostalgia Gas some pleasing news least its pleasing writer comes pages Satellite newsletter San Valeers club Editor Ralph Prey indi cates club seriously considering chang ing flying rules area closely align NFFS NosGas rulesespecially exclusion Cox Tee Dee engines event eligibility comes pass would signify giant step toward NosGas rules uniform ity nationwide basis writer different publication spoke opposition camp questioned San Valeer proposal because replacing Tee Dee current NosGas model would probably result combo being ineffective use future AMA Gas competition Well should certainly hope did miss something Gee thought whole idea NosGas activ ity support laid-back vintage glowpowered competition contrast current AMA/FAI Power scrambles instance Cox Tee Dee 049 has held modern AMA hA Class itself nearly three decades its origins dating back 1961 Thus still powerful com mercially available engine its class date Tee Dee permissiveness /2A NosGas class paralleled allowing Schnuerles larger NosGas classes certainly vintage con cept would lost Obviously latter wont happen however comparison presented offers something ponder regard merits Tee Dee ing permitted /2A NosGas Continued page 169 HUMP -WRONG SMOOTH L. BALSA FILL \ SMOOTH CORRECT STAB TRAILING EDGES FIGURE 1 CORRECTED WRONG Gil Morris have model flew very well until put powerful engine problem occurs during power portion flight maybe its caused trailing edge stabilizer Gil Morris comments experience shed quite a bit light April 1990 75 Rick Pangell winds rubber motor neatly constructed Twin Fin P-30 great unobstructed flying site used Magnificent Mountain Men near Denver Co Youngsters Josh Pangell L Jeff Renner Rick club president Max-Out newsletter editor Photo Perry Peterson SOFT BALSA BLOCKS Curth Bud Romak have interesting solutions loose --motor peg syndrome ADD MOISTURE IN HOLES --I---LPEGFIGURE 2 - SAW NOTCH -TUBING PEG Otto Curth REAR RUBBER-RUBBER BAND MOTOR PEG RETENTION Bud Rottiak Uncle Carl Fries co-founder NFFS passed away Decemoer stay Free Flight St Louis MO area will sorely missed Rich Sanders 1982 photo shows Carl models John Gard-designed Fl B Wakefield PreBuilt MV-i Typhoon * Designed Ron Chidgey *100% Gator RIG Products Components wing/stab tubes & adjusters canopy & cowl * 100% built up construction precision jigs * b Violetts Magnalite GB 125 used formers * Satisfaction Guaranteed WOODGRAINS INC Rt 9 Box 122 Gumming GA 30130 404-889-4758 Tim Megan Richardson Ga Residents Add 6% Sales Tax HIGH QUALITY ULTRA SWITCH HARNESS Gold contacts inside switch connectors manufactured Futaba Ultra low profile actuator Positive lock Mounting simply requires drill ing 114 inch hole 1000k tested Custom cable lengths availble upon request minimal cost ULTRA SWITCH HARNESS $1995 PLUS $250 SNIPPING & HANDUNG proper alignment mounting out board wing struts dry fitting place Once youre satisfied alignment glue struts place allow thor ough drying center section struts A-in dowels cut pro trude about /8 fuselage wing Paint dowels before gluing place Cut windshield thin plastic epoxy place model uses commer cial 1 -in rubber wheels tic wheels available Sig would considerably lightweight Fi nally install engine check center-of-gravity Flying preflight check make sure controls operate smoothly used Cox gray 5 /2 x 4-in-pitch propeller together Ace 1-in spinner Wait until no wind blowing make first flights use 30-ft lines Because greater wing area higher drag biplanes custom arily cant handle much wind other air planes compensation theres certainly nothing prettier air dont live near well-stocked hobby shop everything youll need build fly Cox Special can purchased di rectly Sig Manufacturing Company 401 South Front Street Montezuma IA 50171 Refer companys catalog costs $3 current prices stock numbers happy landings FF Duration/Murphy Continued page 75 Unless t am mistaken intent original Nostalgia Gas concept utilize engines power equivalents era well its model designs produce representative power flight characteristics associated spec ified time frame hope philosophy theorem does become lost shuffle popularity NosGas events increases time probably good spot com pliment Ralph Prey Bob Larsh maintain ing positions stern disciplinarians capacities guardians NFFS Nostagia Gas rule book Whether game toy aero planes stud poker concessions might permitted loopholer contaminated game might become either case should winnings begin shift di rection nonconformist regular basis dangers possibly some other players could become disenchanted possibly quit game altogether Ralph Bob have continually taken deliber ate steps thwart offbeat rules interpreta tions regard issuing ongoing decisions questionable designs along model con struction guidelines clarifications ac companied official NFFS Design Engine Availability lists latest information accounts avail able cost sending $175 Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Hot off presses January last Book #3 contains latest clarifications design list ings interested Contest Directors contes tants alike may wish order copies com ing contest season Also basic rule change under consid eration time proposal change NosGas Ignition event special event status official event event has around two three flying seasons has en joyed increasing participation especially Midwest NosGas buffs Whereas some have always felt vintage ignition-engine competition should appropriately fall under protective wings Society Antique Modelers SAM SAM folks have repeatedly shown little interest recognizing second half ignitionpowered erathat published kitted ignition-engine-powered designs 1942-50 years rate relatively new NosGas Ignition activity certainly signifying defi nite vital signs interest within vintagemodeling community New rule proposals AMA Gas classes seem have low ebb some time say constructive revisions required likely viable solu tions problems readily apparent Although wish present myself national guru matter observation domestic competition AMA Power classes B C D present mixed bag some geographical areas Using Midwest case point would appear past couple years event par ticipation power classes has generally fall en off considerably some larger contests Often uncontested trophies events left tables after close award ceremonies area regional conApril 1990 169 j 5 PING&HANDLING HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP CE LCE p1 OCO 14VYh p o box 5631Iresno 05 93755 tests other hand participation events once-a-year large championship competi tions held same area such AMA FF Nats 1988 USOC 1989 re sulted exact opposite What does situation imply certainly isnt matter just simple prob lem rather lot different hiccupsand some quite obvious However person ally feel pendulum local contest partic ipation will swing upward again soon comes evident will continue least week-long championship competition scheduled year adequate site within reasonable travel distance would-be contes tants entire country say because feel no urge spend time money construction large Gas mo del put Out bucks latest racing en gine spend time associated engine hopups homemade gadgetry eventual com petition small handful area competi tors However should eventual competition include shot vying award field numerous noted competitors goodly por tion national geography interest would zoom wood chips would begin fly once again agree philosophy scenario might explain seri ous modelers past champions have skipped out domestic competition seek tempt ing prestigious battles less controver sial fields offered FAT programs retrospect wish Free Flight community might have able convince some past Nats Committees recent years ex pected calibre competition directly propor tional individuals interest participation interest turn dependent ade quacy proposed battlefields Let us hope new AMA/NFFS arrange ment championship Free Flight may alleviate past situations Anyhow overdue bury animosities Eighties speed Nineties optimism better times forthcoming Well see have gotten sidetracked onto philosophical tangent felt something should said least once day may eventually come may follow course British encompass Free Flight competition /2A FATand place everything else Unlimited class feel could still light years away re quirement should continue take proper steps prevent Well have pondering too long session lets change subject TE tip tremendous velocity modern Schnuerle-engine-powered Free Flight Gas mod el permits little margin error power turned often results various strange behaviors model screams away launch own experiences have also served up some unexpected surprises have gone through various phases attempting use same ba sic model design year after year periodically installing larger powerful engines up front performance requirements continued increase engine runs became shorter case point 600-sq-in model design started life K&B Greenhead 19 now sports 40-cu-in screamer Obviously did get design accept 40 some difficulties structural revisions Most Power enthusiasts cannot seem find time build new model new engine breakthrough can probably identify example effort remain competitive Should adding power cause model go squirrelly maybe item Gilbert Morris might aid solution Its hard believe after wondering what makes high-performance model sometimes race horizontally go over top begin outside loop occurred trailing edges stabs could likely cause chis eled away top see figure rather ing continuation upper surface contour very rear stab theorized air normally separates over hump faulty trailing edge TE dense airor something causes speed up somewhatthe air attaches bev eled portion producing stab lift ordi narily would have presto diving model un der power Now look models ones have given trouble past incorporate beveled TE fix completed stab add wedge balsa top finish out up per contour stab surface Thanks Gil Coupled wing flex prob lem FF Duration April 1986 might rest problem Continued page 174 q Stock No 0PriceQty Amount Toorder ptionII HANDLING CHARGESub Total IERICAN ordor 01use 5R Card ord Handlingorder TOTAL Eblank -COD Order Name Street Address CityState2ip~ call flMasterCard ElVisa ElAmerExp Exp Date615 Card No EShip CODEMy Check enclosed $I A l Name Street Address City Stabs7in 170 Model Aviation Pedect Paint will cover dopes epoxies metals fiberglass styrofoam plastic smooth hard mar resistant finish will crack chip extremely fuel proof virtually odorless will blush excellent flow properties non PC-57 Extra Dark Sea Grey RAP RCAF Neutral Gray USAAF PC-38 Light Slate Grey RAP RCAF Green Grey-GERMANY PC-Se Dark Slate Grey RAF ROAF Army Green Japan PC4O Dark Green & Extra Dk Sea Green RAP FCAF Dark Green GERMANY PC-41 PC-43 Dead Flat Clear PC-44 Sea Blue Semi-Gloss USN PC-45 Intermediate Blue Semi-Gloss USN PC-46 Duck Egg Blue GERMANY RAF CHIP CHARTS AVAILABLE Navy Green JAPAN PC-42 Olive Drab USAAP perfect psr1fct Al PO Box 2480 usky OhIo 44870 419 797-2208 Original EZ UP% * Sun Shelters 8x8Sturdy St.l Frames Heavy Duty Fade Resistant Nylon alOxlO Canopies RedWhite Blue alOK 15Sets Up less 60 Seconds Authorized E-Z up Corp DealerNo Ropes Nothing Assemble * John Peck Leisure Products Ltd AMA 8580131 Ravenwood Road Other Sizes Colors Accessories Available Plus LJ Versailles KY 40383 Custom Logos LetteringWrite1606 873-5172 Oigao FF Duration/Murphy Continued page 170 Rubber powerrear motor peg anchors di cussion last column retention res rubber motor anchor pins begat some p pin-retention methods popping out posE pouch Otto Curth sent couple tried-and-tm solutions Otto says cements soft balsa blocks bot sides Rubber model fuselages insid model opposite motor peg holes se figure applies moisture hole balsa will swell thereby decreasin hole size retain motor peg snugly Should peg become loose fit hol once again process repeated squirtir moisture holes balsa bloel also tend retain rubber motor near cei ter model better fuselage stress distribt tion motor fully wound Otto also contributed retention method h has seen Bud Romak use First saws notcht outboard ends aluminum-tube motc pegs installs pegs fuselage H hooks rubberband peg notch o side fuselage stretches halfwa around fuselage hooks sa notch other end motor peg lik provides quick visible metho ensure precaution has complete panic launch officis flight what appears thermal formin upwind domino effect workings aton bomb no particular mystery columnist editors can relate specifi instances chain reaction confusioi has followed omission mistake misquote mislabeled photo caption like timi another some scribes may tend ignore sit uations am prefers attempt fol low up corrections soon possiblr intended pointing fingers wh dunnit sleep better night th clocks ticking unison case point report 89 USOC saw print January issue First offand probable cause some u editing confusion followedis tha yers truly inadvertently omitted AMI Class C Gas results box scores th article submitted want fix goof righ now 1989 NFFS/USOC Box Score C GasOpen 1Russ SnyderUniversal City TX 2Ed KeckWebster NY 3 Charles Caton Montgomery AL 4 Marvin Mace Seguin TX 5 Bill Dunlop Greenville PA Seconds 1758 1650 726* 1586 1002 750 apologies aboveand ma certain embarrassment Also note asterisk * following Ed Keck5 flight total Whereas posted 1650-sec score second place before official flying hour closed day went rack up 726 sec onds after deadline establish ney AMA Category III C Gas Open record cap tion beneath photo page 77 Ed hi Class C NosGas-winning Crescendo fi somewha ambiguous indicates record estab Continued page 176 174 Model Aviation CDLt5tRP Sand Tan USAF PC-32 Middlestone USAAF Tan JAPAN Mid Stone RAP ROAF PC-33 Dark Earth USAAF RAF RCAF PC-SI Blue GERMANY PC-u Azure Blue USAAF RAP RCAF GERMANY PC-Se Grey Japan Freedom 207 Proof positii F, lished C NosGas C AMA Gas As know no records kept Nos Gas events am will attempt correct couple other photo captions re ceived hate mail phone calls Obviously Bob Dunhams Motorvator Bill Prenskys Shocer photos caption page 77 eligible Nos talgia Gas designs side-by-side associated photo captions declare statement should ease consternation attentive Nostalgia Gas buffs actuality Dunhams pictured model won AMA Gas event however did win third place NosGas Class scaled-down Taibi-designed Spacer Although Bill Prensky placed fourth NosGas Class C Gas wasnt Shocer displaying particular photograph Finally Bob Schlarb photo caption page 77 would like know son Ralph fatherand other way around Whew hope new Franklin Spelimaster received Christmas present going prevent some glitches future next gather round shall strive get back track beginning end Zeek chronicles Till See ya downwind FF Indoor/Tenny Continued page 76 ing February 1990 motor will have D turns torque will stabilized flight motor will quite repeatable cause energy storage will standardized Torque vs time Figure 2 shows three impor tant torque values Indoor flight Begin ning launch torque model climbs until torque returns level flight torque its downhill proper rubber choice made level flight torque will linear part curve torque unwinding motor continues drop passing through critical torque minimum torque required keep prop ac tively pulling torque drops below critical range model has push prop keep rpm up model comes down faster properly adjusted model optimum prop rubber match will touch down just critical torque reached Rpm vs time Figure 3 shows rpm variations properly wound no-touch Indoor flight has optimal trim optimal match between rub ber prop ceiling height model climbs rate approximately proportional rpm until level flight torque reached point un til touchdown rpm stable unless flight disturbed critical torque reached technically perfect flight though probably wont winners unless ceil ing too rough models touch Another alternative Jim Richmond flies fairly routinely manner just described Jim will ceiling-scrub its necessary win mastery trim design flight strategy hall meteorology study air conditions site usually adequate win touching top 176 Model Aviation Microfilm time experience has mi crofilm should poured wintertime time read will almost too late poured quite lot film during midsummer difficult time based past experience Early session looked yield wouldnt good because several sheets broke shortly after lifting happens solvents havent finished evaporating before lifting film solved problem using small batterypowered fan shown photos agi tate air over poured sheet fan enough blast rippled water film strongly agitated film two three mm2700 p&z2"2121]5000 3view &awings Antique Military CiviIiar HeIicopter Sailpianes color POTO-PAKSIncludino K04UPAU climb Instead wind motor nearly maxi mum stress back turns C using tech niques discussed previous column wind
Edition: Model Aviation - 1990/04
Page Numbers: 74, 75, 169, 170, 174, 176
NFFS NEWS Free Flight Digest official monthly publication National Free Flight Society NFFS has new editor person Chris Weinrich Bob Meuser Model Aviation s Free Flight Duration columnist years also performing editor Redacteur en Chef Digest some 18 yearsand doing admirable job Bob nounced change editorship formal letter various newsletter editors maga zine columnists think should thank Bob past service NFFS wish him well future endeavors Chris Weinrich will henceforth accepting associated correspondence Digest 905 West 5th Ave Olympia WA 98502 Welcome aboard Chris NFFS also has new Membership Chair man Nat Comfort replaced Sal Fruciano January 1990 Sal served about two years volunteer capacity efforts appreciated well Nat enthusiastic East Coast Free Flighter will receiving new membership applica tions 12324 Percival St Chester VA 23831 appears Nat will quite busy year processing sudden upswing new NFFS memberships Free Flighters showing creasing support recent efforts revi talized NFFS understand 60% increase new memberships 1989 lets see can surpassed 1990 annual mem bership fee $15but $750 un der 18 years age havent done yet join renew today As Irish ancestors would say Free Flight Go Bragh Free Flight Forever sad note Carl Fries cofounder NFFS organization left us December 7 1989 age 74 Uncle Carl fondly called formed NFFS along Dick Black 1966/67 time frame sole purpose promoting Free Flight competition talked congenial friendly man Lawrenceville last summer ecstatic over concept NFFS/USOC resultant re sponse signified tremendous turnout con testants interpreted positive show hands beloved Free Flight hobby Lets keep going its great said Now Free Flight mourns friend Farewell God bless Uncle Carl Free Flight Nats week1990 week-long 1990 USOC/AMA Nats Lawrenceville IL mid-October will include NFFS Nostalgia Gas National Champs well two previous NFFS NosGas champs have staged con junction Society Antique Modelers annual SAM Champs first instigated Bob Larsh 1988 SAM Champs Law renceville IL carried through Ralph Prey 89 SAM Champs Jean NV Meanwhile NFFS-sponsored USOC Unit ed States Outdoor Champs concept evolved separate root different reasons its ini tial competition took place June 1989 Nos talgia Gas events carded six events week-long affair package drew amazing number entrants Due success interest con solidating two NFFS activities parties volved have agreed future home NFFS NosGas Champs should hereafter fall un der umbrella annual NFFS-sponsored United States Outdoor Champs possi ble Whereas 1990 NFFS/USOC mar ried Free Flight portion 1990 AMA Nats scheduled mid-October gathering shall now serve biggie event year 74 Model Aviation Free Flight Duration Harry Murphy 3924 Oakwood Blvd Anderson IN 460 I much-traveled model box Dale Mateer Centerville OH shows what takes serious FAI Power competition made aluminum completely lined foam Egotistic golf ers take ball go play Dale former member US FAI FF Power team Photo below shows what both Dale models look like Mark Sexton Bruce Kimball Taft CA Models V2A NosGas renditions Top Banana Ramrod respectively NosGas activity thriving everywhere S Sexton plc Dennis Phillips immaculate Civy Boy 61 covered red silk trimmed opaque light blue won NosGas Class B against 30 other entrants 89 NFFS/USOC meet Lawrenceville IL modelers have built Civy Boys never learned trim successful flights Others can three factions 1990 NosGas Champs schedule will clude six events hA A B C/D Ignition However popular request events will spread over five days competition rather crammed first two days case initial 89 USOC Another revision note awards will presented down roster event winners far eighth place high-entry events least third place events have tra ditionally shown lower levels participation policy will prevail other Rubber Glider Gas events AMA card well USOC manager Jim OReilly has signed Jim Bennett St Louis overall Contest Director week-long fray official dates ing October 16-20 thats Tuesday through Satur day special proclamation has issued full week Indian Summer ideal flying conditions See Some ponderings FF Gas rules still subject NFFS Nostalgia Gas some pleasing news least its pleasing writer comes pages Satellite newsletter San Valeers club Editor Ralph Prey indi cates club seriously considering chang ing flying rules area closely align NFFS NosGas rulesespecially exclusion Cox Tee Dee engines event eligibility comes pass would signify giant step toward NosGas rules uniform ity nationwide basis writer different publication spoke opposition camp questioned San Valeer proposal because replacing Tee Dee current NosGas model would probably result combo being ineffective use future AMA Gas competition Well should certainly hope did miss something Gee thought whole idea NosGas activ ity support laid-back vintage glowpowered competition contrast current AMA/FAI Power scrambles instance Cox Tee Dee 049 has held modern AMA hA Class itself nearly three decades its origins dating back 1961 Thus still powerful com mercially available engine its class date Tee Dee permissiveness /2A NosGas class paralleled allowing Schnuerles larger NosGas classes certainly vintage con cept would lost Obviously latter wont happen however comparison presented offers something ponder regard merits Tee Dee ing permitted /2A NosGas Continued page 169 HUMP -WRONG SMOOTH L. BALSA FILL \ SMOOTH CORRECT STAB TRAILING EDGES FIGURE 1 CORRECTED WRONG Gil Morris have model flew very well until put powerful engine problem occurs during power portion flight maybe its caused trailing edge stabilizer Gil Morris comments experience shed quite a bit light April 1990 75 Rick Pangell winds rubber motor neatly constructed Twin Fin P-30 great unobstructed flying site used Magnificent Mountain Men near Denver Co Youngsters Josh Pangell L Jeff Renner Rick club president Max-Out newsletter editor Photo Perry Peterson SOFT BALSA BLOCKS Curth Bud Romak have interesting solutions loose --motor peg syndrome ADD MOISTURE IN HOLES --I---LPEGFIGURE 2 - SAW NOTCH -TUBING PEG Otto Curth REAR RUBBER-RUBBER BAND MOTOR PEG RETENTION Bud Rottiak Uncle Carl Fries co-founder NFFS passed away Decemoer stay Free Flight St Louis MO area will sorely missed Rich Sanders 1982 photo shows Carl models John Gard-designed Fl B Wakefield PreBuilt MV-i Typhoon * Designed Ron Chidgey *100% Gator RIG Products Components wing/stab tubes & adjusters canopy & cowl * 100% built up construction precision jigs * b Violetts Magnalite GB 125 used formers * Satisfaction Guaranteed WOODGRAINS INC Rt 9 Box 122 Gumming GA 30130 404-889-4758 Tim Megan Richardson Ga Residents Add 6% Sales Tax HIGH QUALITY ULTRA SWITCH HARNESS Gold contacts inside switch connectors manufactured Futaba Ultra low profile actuator Positive lock Mounting simply requires drill ing 114 inch hole 1000k tested Custom cable lengths availble upon request minimal cost ULTRA SWITCH HARNESS $1995 PLUS $250 SNIPPING & HANDUNG proper alignment mounting out board wing struts dry fitting place Once youre satisfied alignment glue struts place allow thor ough drying center section struts A-in dowels cut pro trude about /8 fuselage wing Paint dowels before gluing place Cut windshield thin plastic epoxy place model uses commer cial 1 -in rubber wheels tic wheels available Sig would considerably lightweight Fi nally install engine check center-of-gravity Flying preflight check make sure controls operate smoothly used Cox gray 5 /2 x 4-in-pitch propeller together Ace 1-in spinner Wait until no wind blowing make first flights use 30-ft lines Because greater wing area higher drag biplanes custom arily cant handle much wind other air planes compensation theres certainly nothing prettier air dont live near well-stocked hobby shop everything youll need build fly Cox Special can purchased di rectly Sig Manufacturing Company 401 South Front Street Montezuma IA 50171 Refer companys catalog costs $3 current prices stock numbers happy landings FF Duration/Murphy Continued page 75 Unless t am mistaken intent original Nostalgia Gas concept utilize engines power equivalents era well its model designs produce representative power flight characteristics associated spec ified time frame hope philosophy theorem does become lost shuffle popularity NosGas events increases time probably good spot com pliment Ralph Prey Bob Larsh maintain ing positions stern disciplinarians capacities guardians NFFS Nostagia Gas rule book Whether game toy aero planes stud poker concessions might permitted loopholer contaminated game might become either case should winnings begin shift di rection nonconformist regular basis dangers possibly some other players could become disenchanted possibly quit game altogether Ralph Bob have continually taken deliber ate steps thwart offbeat rules interpreta tions regard issuing ongoing decisions questionable designs along model con struction guidelines clarifications ac companied official NFFS Design Engine Availability lists latest information accounts avail able cost sending $175 Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Hot off presses January last Book #3 contains latest clarifications design list ings interested Contest Directors contes tants alike may wish order copies com ing contest season Also basic rule change under consid eration time proposal change NosGas Ignition event special event status official event event has around two three flying seasons has en joyed increasing participation especially Midwest NosGas buffs Whereas some have always felt vintage ignition-engine competition should appropriately fall under protective wings Society Antique Modelers SAM SAM folks have repeatedly shown little interest recognizing second half ignitionpowered erathat published kitted ignition-engine-powered designs 1942-50 years rate relatively new NosGas Ignition activity certainly signifying defi nite vital signs interest within vintagemodeling community New rule proposals AMA Gas classes seem have low ebb some time say constructive revisions required likely viable solu tions problems readily apparent Although wish present myself national guru matter observation domestic competition AMA Power classes B C D present mixed bag some geographical areas Using Midwest case point would appear past couple years event par ticipation power classes has generally fall en off considerably some larger contests Often uncontested trophies events left tables after close award ceremonies area regional conApril 1990 169 j 5 PING&HANDLING HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP CE LCE p1 OCO 14VYh p o box 5631Iresno 05 93755 tests other hand participation events once-a-year large championship competi tions held same area such AMA FF Nats 1988 USOC 1989 re sulted exact opposite What does situation imply certainly isnt matter just simple prob lem rather lot different hiccupsand some quite obvious However person ally feel pendulum local contest partic ipation will swing upward again soon comes evident will continue least week-long championship competition scheduled year adequate site within reasonable travel distance would-be contes tants entire country say because feel no urge spend time money construction large Gas mo del put Out bucks latest racing en gine spend time associated engine hopups homemade gadgetry eventual com petition small handful area competi tors However should eventual competition include shot vying award field numerous noted competitors goodly por tion national geography interest would zoom wood chips would begin fly once again agree philosophy scenario might explain seri ous modelers past champions have skipped out domestic competition seek tempt ing prestigious battles less controver sial fields offered FAT programs retrospect wish Free Flight community might have able convince some past Nats Committees recent years ex pected calibre competition directly propor tional individuals interest participation interest turn dependent ade quacy proposed battlefields Let us hope new AMA/NFFS arrange ment championship Free Flight may alleviate past situations Anyhow overdue bury animosities Eighties speed Nineties optimism better times forthcoming Well see have gotten sidetracked onto philosophical tangent felt something should said least once day may eventually come may follow course British encompass Free Flight competition /2A FATand place everything else Unlimited class feel could still light years away re quirement should continue take proper steps prevent Well have pondering too long session lets change subject TE tip tremendous velocity modern Schnuerle-engine-powered Free Flight Gas mod el permits little margin error power turned often results various strange behaviors model screams away launch own experiences have also served up some unexpected surprises have gone through various phases attempting use same ba sic model design year after year periodically installing larger powerful engines up front performance requirements continued increase engine runs became shorter case point 600-sq-in model design started life K&B Greenhead 19 now sports 40-cu-in screamer Obviously did get design accept 40 some difficulties structural revisions Most Power enthusiasts cannot seem find time build new model new engine breakthrough can probably identify example effort remain competitive Should adding power cause model go squirrelly maybe item Gilbert Morris might aid solution Its hard believe after wondering what makes high-performance model sometimes race horizontally go over top begin outside loop occurred trailing edges stabs could likely cause chis eled away top see figure rather ing continuation upper surface contour very rear stab theorized air normally separates over hump faulty trailing edge TE dense airor something causes speed up somewhatthe air attaches bev eled portion producing stab lift ordi narily would have presto diving model un der power Now look models ones have given trouble past incorporate beveled TE fix completed stab add wedge balsa top finish out up per contour stab surface Thanks Gil Coupled wing flex prob lem FF Duration April 1986 might rest problem Continued page 174 q Stock No 0PriceQty Amount Toorder ptionII HANDLING CHARGESub Total IERICAN ordor 01use 5R Card ord Handlingorder TOTAL Eblank -COD Order Name Street Address CityState2ip~ call flMasterCard ElVisa ElAmerExp Exp Date615 Card No EShip CODEMy Check enclosed $I A l Name Street Address City Stabs7in 170 Model Aviation Pedect Paint will cover dopes epoxies metals fiberglass styrofoam plastic smooth hard mar resistant finish will crack chip extremely fuel proof virtually odorless will blush excellent flow properties non PC-57 Extra Dark Sea Grey RAP RCAF Neutral Gray USAAF PC-38 Light Slate Grey RAP RCAF Green Grey-GERMANY PC-Se Dark Slate Grey RAF ROAF Army Green Japan PC4O Dark Green & Extra Dk Sea Green RAP FCAF Dark Green GERMANY PC-41 PC-43 Dead Flat Clear PC-44 Sea Blue Semi-Gloss USN PC-45 Intermediate Blue Semi-Gloss USN PC-46 Duck Egg Blue GERMANY RAF CHIP CHARTS AVAILABLE Navy Green JAPAN PC-42 Olive Drab USAAP perfect psr1fct Al PO Box 2480 usky OhIo 44870 419 797-2208 Original EZ UP% * Sun Shelters 8x8Sturdy St.l Frames Heavy Duty Fade Resistant Nylon alOxlO Canopies RedWhite Blue alOK 15Sets Up less 60 Seconds Authorized E-Z up Corp DealerNo Ropes Nothing Assemble * John Peck Leisure Products Ltd AMA 8580131 Ravenwood Road Other Sizes Colors Accessories Available Plus LJ Versailles KY 40383 Custom Logos LetteringWrite1606 873-5172 Oigao FF Duration/Murphy Continued page 170 Rubber powerrear motor peg anchors di cussion last column retention res rubber motor anchor pins begat some p pin-retention methods popping out posE pouch Otto Curth sent couple tried-and-tm solutions Otto says cements soft balsa blocks bot sides Rubber model fuselages insid model opposite motor peg holes se figure applies moisture hole balsa will swell thereby decreasin hole size retain motor peg snugly Should peg become loose fit hol once again process repeated squirtir moisture holes balsa bloel also tend retain rubber motor near cei ter model better fuselage stress distribt tion motor fully wound Otto also contributed retention method h has seen Bud Romak use First saws notcht outboard ends aluminum-tube motc pegs installs pegs fuselage H hooks rubberband peg notch o side fuselage stretches halfwa around fuselage hooks sa notch other end motor peg lik provides quick visible metho ensure precaution has complete panic launch officis flight what appears thermal formin upwind domino effect workings aton bomb no particular mystery columnist editors can relate specifi instances chain reaction confusioi has followed omission mistake misquote mislabeled photo caption like timi another some scribes may tend ignore sit uations am prefers attempt fol low up corrections soon possiblr intended pointing fingers wh dunnit sleep better night th clocks ticking unison case point report 89 USOC saw print January issue First offand probable cause some u editing confusion followedis tha yers truly inadvertently omitted AMI Class C Gas results box scores th article submitted want fix goof righ now 1989 NFFS/USOC Box Score C GasOpen 1Russ SnyderUniversal City TX 2Ed KeckWebster NY 3 Charles Caton Montgomery AL 4 Marvin Mace Seguin TX 5 Bill Dunlop Greenville PA Seconds 1758 1650 726* 1586 1002 750 apologies aboveand ma certain embarrassment Also note asterisk * following Ed Keck5 flight total Whereas posted 1650-sec score second place before official flying hour closed day went rack up 726 sec onds after deadline establish ney AMA Category III C Gas Open record cap tion beneath photo page 77 Ed hi Class C NosGas-winning Crescendo fi somewha ambiguous indicates record estab Continued page 176 174 Model Aviation CDLt5tRP Sand Tan USAF PC-32 Middlestone USAAF Tan JAPAN Mid Stone RAP ROAF PC-33 Dark Earth USAAF RAF RCAF PC-SI Blue GERMANY PC-u Azure Blue USAAF RAP RCAF GERMANY PC-Se Grey Japan Freedom 207 Proof positii F, lished C NosGas C AMA Gas As know no records kept Nos Gas events am will attempt correct couple other photo captions re ceived hate mail phone calls Obviously Bob Dunhams Motorvator Bill Prenskys Shocer photos caption page 77 eligible Nos talgia Gas designs side-by-side associated photo captions declare statement should ease consternation attentive Nostalgia Gas buffs actuality Dunhams pictured model won AMA Gas event however did win third place NosGas Class scaled-down Taibi-designed Spacer Although Bill Prensky placed fourth NosGas Class C Gas wasnt Shocer displaying particular photograph Finally Bob Schlarb photo caption page 77 would like know son Ralph fatherand other way around Whew hope new Franklin Spelimaster received Christmas present going prevent some glitches future next gather round shall strive get back track beginning end Zeek chronicles Till See ya downwind FF Indoor/Tenny Continued page 76 ing February 1990 motor will have D turns torque will stabilized flight motor will quite repeatable cause energy storage will standardized Torque vs time Figure 2 shows three impor tant torque values Indoor flight Begin ning launch torque model climbs until torque returns level flight torque its downhill proper rubber choice made level flight torque will linear part curve torque unwinding motor continues drop passing through critical torque minimum torque required keep prop ac tively pulling torque drops below critical range model has push prop keep rpm up model comes down faster properly adjusted model optimum prop rubber match will touch down just critical torque reached Rpm vs time Figure 3 shows rpm variations properly wound no-touch Indoor flight has optimal trim optimal match between rub ber prop ceiling height model climbs rate approximately proportional rpm until level flight torque reached point un til touchdown rpm stable unless flight disturbed critical torque reached technically perfect flight though probably wont winners unless ceil ing too rough models touch Another alternative Jim Richmond flies fairly routinely manner just described Jim will ceiling-scrub its necessary win mastery trim design flight strategy hall meteorology study air conditions site usually adequate win touching top 176 Model Aviation Microfilm time experience has mi crofilm should poured wintertime time read will almost too late poured quite lot film during midsummer difficult time based past experience Early session looked yield wouldnt good because several sheets broke shortly after lifting happens solvents havent finished evaporating before lifting film solved problem using small batterypowered fan shown photos agi tate air over poured sheet fan enough blast rippled water film strongly agitated film two three mm2700 p&z2"2121]5000 3view &awings Antique Military CiviIiar HeIicopter Sailpianes color POTO-PAKSIncludino K04UPAU climb Instead wind motor nearly maxi mum stress back turns C using tech niques discussed previous column wind
Edition: Model Aviation - 1990/04
Page Numbers: 74, 75, 169, 170, 174, 176
NFFS NEWS Free Flight Digest official monthly publication National Free Flight Society NFFS has new editor person Chris Weinrich Bob Meuser Model Aviation s Free Flight Duration columnist years also performing editor Redacteur en Chef Digest some 18 yearsand doing admirable job Bob nounced change editorship formal letter various newsletter editors maga zine columnists think should thank Bob past service NFFS wish him well future endeavors Chris Weinrich will henceforth accepting associated correspondence Digest 905 West 5th Ave Olympia WA 98502 Welcome aboard Chris NFFS also has new Membership Chair man Nat Comfort replaced Sal Fruciano January 1990 Sal served about two years volunteer capacity efforts appreciated well Nat enthusiastic East Coast Free Flighter will receiving new membership applica tions 12324 Percival St Chester VA 23831 appears Nat will quite busy year processing sudden upswing new NFFS memberships Free Flighters showing creasing support recent efforts revi talized NFFS understand 60% increase new memberships 1989 lets see can surpassed 1990 annual mem bership fee $15but $750 un der 18 years age havent done yet join renew today As Irish ancestors would say Free Flight Go Bragh Free Flight Forever sad note Carl Fries cofounder NFFS organization left us December 7 1989 age 74 Uncle Carl fondly called formed NFFS along Dick Black 1966/67 time frame sole purpose promoting Free Flight competition talked congenial friendly man Lawrenceville last summer ecstatic over concept NFFS/USOC resultant re sponse signified tremendous turnout con testants interpreted positive show hands beloved Free Flight hobby Lets keep going its great said Now Free Flight mourns friend Farewell God bless Uncle Carl Free Flight Nats week1990 week-long 1990 USOC/AMA Nats Lawrenceville IL mid-October will include NFFS Nostalgia Gas National Champs well two previous NFFS NosGas champs have staged con junction Society Antique Modelers annual SAM Champs first instigated Bob Larsh 1988 SAM Champs Law renceville IL carried through Ralph Prey 89 SAM Champs Jean NV Meanwhile NFFS-sponsored USOC Unit ed States Outdoor Champs concept evolved separate root different reasons its ini tial competition took place June 1989 Nos talgia Gas events carded six events week-long affair package drew amazing number entrants Due success interest con solidating two NFFS activities parties volved have agreed future home NFFS NosGas Champs should hereafter fall un der umbrella annual NFFS-sponsored United States Outdoor Champs possi ble Whereas 1990 NFFS/USOC mar ried Free Flight portion 1990 AMA Nats scheduled mid-October gathering shall now serve biggie event year 74 Model Aviation Free Flight Duration Harry Murphy 3924 Oakwood Blvd Anderson IN 460 I much-traveled model box Dale Mateer Centerville OH shows what takes serious FAI Power competition made aluminum completely lined foam Egotistic golf ers take ball go play Dale former member US FAI FF Power team Photo below shows what both Dale models look like Mark Sexton Bruce Kimball Taft CA Models V2A NosGas renditions Top Banana Ramrod respectively NosGas activity thriving everywhere S Sexton plc Dennis Phillips immaculate Civy Boy 61 covered red silk trimmed opaque light blue won NosGas Class B against 30 other entrants 89 NFFS/USOC meet Lawrenceville IL modelers have built Civy Boys never learned trim successful flights Others can three factions 1990 NosGas Champs schedule will clude six events hA A B C/D Ignition However popular request events will spread over five days competition rather crammed first two days case initial 89 USOC Another revision note awards will presented down roster event winners far eighth place high-entry events least third place events have tra ditionally shown lower levels participation policy will prevail other Rubber Glider Gas events AMA card well USOC manager Jim OReilly has signed Jim Bennett St Louis overall Contest Director week-long fray official dates ing October 16-20 thats Tuesday through Satur day special proclamation has issued full week Indian Summer ideal flying conditions See Some ponderings FF Gas rules still subject NFFS Nostalgia Gas some pleasing news least its pleasing writer comes pages Satellite newsletter San Valeers club Editor Ralph Prey indi cates club seriously considering chang ing flying rules area closely align NFFS NosGas rulesespecially exclusion Cox Tee Dee engines event eligibility comes pass would signify giant step toward NosGas rules uniform ity nationwide basis writer different publication spoke opposition camp questioned San Valeer proposal because replacing Tee Dee current NosGas model would probably result combo being ineffective use future AMA Gas competition Well should certainly hope did miss something Gee thought whole idea NosGas activ ity support laid-back vintage glowpowered competition contrast current AMA/FAI Power scrambles instance Cox Tee Dee 049 has held modern AMA hA Class itself nearly three decades its origins dating back 1961 Thus still powerful com mercially available engine its class date Tee Dee permissiveness /2A NosGas class paralleled allowing Schnuerles larger NosGas classes certainly vintage con cept would lost Obviously latter wont happen however comparison presented offers something ponder regard merits Tee Dee ing permitted /2A NosGas Continued page 169 HUMP -WRONG SMOOTH L. BALSA FILL \ SMOOTH CORRECT STAB TRAILING EDGES FIGURE 1 CORRECTED WRONG Gil Morris have model flew very well until put powerful engine problem occurs during power portion flight maybe its caused trailing edge stabilizer Gil Morris comments experience shed quite a bit light April 1990 75 Rick Pangell winds rubber motor neatly constructed Twin Fin P-30 great unobstructed flying site used Magnificent Mountain Men near Denver Co Youngsters Josh Pangell L Jeff Renner Rick club president Max-Out newsletter editor Photo Perry Peterson SOFT BALSA BLOCKS Curth Bud Romak have interesting solutions loose --motor peg syndrome ADD MOISTURE IN HOLES --I---LPEGFIGURE 2 - SAW NOTCH -TUBING PEG Otto Curth REAR RUBBER-RUBBER BAND MOTOR PEG RETENTION Bud Rottiak Uncle Carl Fries co-founder NFFS passed away Decemoer stay Free Flight St Louis MO area will sorely missed Rich Sanders 1982 photo shows Carl models John Gard-designed Fl B Wakefield PreBuilt MV-i Typhoon * Designed Ron Chidgey *100% Gator RIG Products Components wing/stab tubes & adjusters canopy & cowl * 100% built up construction precision jigs * b Violetts Magnalite GB 125 used formers * Satisfaction Guaranteed WOODGRAINS INC Rt 9 Box 122 Gumming GA 30130 404-889-4758 Tim Megan Richardson Ga Residents Add 6% Sales Tax HIGH QUALITY ULTRA SWITCH HARNESS Gold contacts inside switch connectors manufactured Futaba Ultra low profile actuator Positive lock Mounting simply requires drill ing 114 inch hole 1000k tested Custom cable lengths availble upon request minimal cost ULTRA SWITCH HARNESS $1995 PLUS $250 SNIPPING & HANDUNG proper alignment mounting out board wing struts dry fitting place Once youre satisfied alignment glue struts place allow thor ough drying center section struts A-in dowels cut pro trude about /8 fuselage wing Paint dowels before gluing place Cut windshield thin plastic epoxy place model uses commer cial 1 -in rubber wheels tic wheels available Sig would considerably lightweight Fi nally install engine check center-of-gravity Flying preflight check make sure controls operate smoothly used Cox gray 5 /2 x 4-in-pitch propeller together Ace 1-in spinner Wait until no wind blowing make first flights use 30-ft lines Because greater wing area higher drag biplanes custom arily cant handle much wind other air planes compensation theres certainly nothing prettier air dont live near well-stocked hobby shop everything youll need build fly Cox Special can purchased di rectly Sig Manufacturing Company 401 South Front Street Montezuma IA 50171 Refer companys catalog costs $3 current prices stock numbers happy landings FF Duration/Murphy Continued page 75 Unless t am mistaken intent original Nostalgia Gas concept utilize engines power equivalents era well its model designs produce representative power flight characteristics associated spec ified time frame hope philosophy theorem does become lost shuffle popularity NosGas events increases time probably good spot com pliment Ralph Prey Bob Larsh maintain ing positions stern disciplinarians capacities guardians NFFS Nostagia Gas rule book Whether game toy aero planes stud poker concessions might permitted loopholer contaminated game might become either case should winnings begin shift di rection nonconformist regular basis dangers possibly some other players could become disenchanted possibly quit game altogether Ralph Bob have continually taken deliber ate steps thwart offbeat rules interpreta tions regard issuing ongoing decisions questionable designs along model con struction guidelines clarifications ac companied official NFFS Design Engine Availability lists latest information accounts avail able cost sending $175 Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Hot off presses January last Book #3 contains latest clarifications design list ings interested Contest Directors contes tants alike may wish order copies com ing contest season Also basic rule change under consid eration time proposal change NosGas Ignition event special event status official event event has around two three flying seasons has en joyed increasing participation especially Midwest NosGas buffs Whereas some have always felt vintage ignition-engine competition should appropriately fall under protective wings Society Antique Modelers SAM SAM folks have repeatedly shown little interest recognizing second half ignitionpowered erathat published kitted ignition-engine-powered designs 1942-50 years rate relatively new NosGas Ignition activity certainly signifying defi nite vital signs interest within vintagemodeling community New rule proposals AMA Gas classes seem have low ebb some time say constructive revisions required likely viable solu tions problems readily apparent Although wish present myself national guru matter observation domestic competition AMA Power classes B C D present mixed bag some geographical areas Using Midwest case point would appear past couple years event par ticipation power classes has generally fall en off considerably some larger contests Often uncontested trophies events left tables after close award ceremonies area regional conApril 1990 169 j 5 PING&HANDLING HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP CE LCE p1 OCO 14VYh p o box 5631Iresno 05 93755 tests other hand participation events once-a-year large championship competi tions held same area such AMA FF Nats 1988 USOC 1989 re sulted exact opposite What does situation imply certainly isnt matter just simple prob lem rather lot different hiccupsand some quite obvious However person ally feel pendulum local contest partic ipation will swing upward again soon comes evident will continue least week-long championship competition scheduled year adequate site within reasonable travel distance would-be contes tants entire country say because feel no urge spend time money construction large Gas mo del put Out bucks latest racing en gine spend time associated engine hopups homemade gadgetry eventual com petition small handful area competi tors However should eventual competition include shot vying award field numerous noted competitors goodly por tion national geography interest would zoom wood chips would begin fly once again agree philosophy scenario might explain seri ous modelers past champions have skipped out domestic competition seek tempt ing prestigious battles less controver sial fields offered FAT programs retrospect wish Free Flight community might have able convince some past Nats Committees recent years ex pected calibre competition directly propor tional individuals interest participation interest turn dependent ade quacy proposed battlefields Let us hope new AMA/NFFS arrange ment championship Free Flight may alleviate past situations Anyhow overdue bury animosities Eighties speed Nineties optimism better times forthcoming Well see have gotten sidetracked onto philosophical tangent felt something should said least once day may eventually come may follow course British encompass Free Flight competition /2A FATand place everything else Unlimited class feel could still light years away re quirement should continue take proper steps prevent Well have pondering too long session lets change subject TE tip tremendous velocity modern Schnuerle-engine-powered Free Flight Gas mod el permits little margin error power turned often results various strange behaviors model screams away launch own experiences have also served up some unexpected surprises have gone through various phases attempting use same ba sic model design year after year periodically installing larger powerful engines up front performance requirements continued increase engine runs became shorter case point 600-sq-in model design started life K&B Greenhead 19 now sports 40-cu-in screamer Obviously did get design accept 40 some difficulties structural revisions Most Power enthusiasts cannot seem find time build new model new engine breakthrough can probably identify example effort remain competitive Should adding power cause model go squirrelly maybe item Gilbert Morris might aid solution Its hard believe after wondering what makes high-performance model sometimes race horizontally go over top begin outside loop occurred trailing edges stabs could likely cause chis eled away top see figure rather ing continuation upper surface contour very rear stab theorized air normally separates over hump faulty trailing edge TE dense airor something causes speed up somewhatthe air attaches bev eled portion producing stab lift ordi narily would have presto diving model un der power Now look models ones have given trouble past incorporate beveled TE fix completed stab add wedge balsa top finish out up per contour stab surface Thanks Gil Coupled wing flex prob lem FF Duration April 1986 might rest problem Continued page 174 q Stock No 0PriceQty Amount Toorder ptionII HANDLING CHARGESub Total IERICAN ordor 01use 5R Card ord Handlingorder TOTAL Eblank -COD Order Name Street Address CityState2ip~ call flMasterCard ElVisa ElAmerExp Exp Date615 Card No EShip CODEMy Check enclosed $I A l Name Street Address City Stabs7in 170 Model Aviation Pedect Paint will cover dopes epoxies metals fiberglass styrofoam plastic smooth hard mar resistant finish will crack chip extremely fuel proof virtually odorless will blush excellent flow properties non PC-57 Extra Dark Sea Grey RAP RCAF Neutral Gray USAAF PC-38 Light Slate Grey RAP RCAF Green Grey-GERMANY PC-Se Dark Slate Grey RAF ROAF Army Green Japan PC4O Dark Green & Extra Dk Sea Green RAP FCAF Dark Green GERMANY PC-41 PC-43 Dead Flat Clear PC-44 Sea Blue Semi-Gloss USN PC-45 Intermediate Blue Semi-Gloss USN PC-46 Duck Egg Blue GERMANY RAF CHIP CHARTS AVAILABLE Navy Green JAPAN PC-42 Olive Drab USAAP perfect psr1fct Al PO Box 2480 usky OhIo 44870 419 797-2208 Original EZ UP% * Sun Shelters 8x8Sturdy St.l Frames Heavy Duty Fade Resistant Nylon alOxlO Canopies RedWhite Blue alOK 15Sets Up less 60 Seconds Authorized E-Z up Corp DealerNo Ropes Nothing Assemble * John Peck Leisure Products Ltd AMA 8580131 Ravenwood Road Other Sizes Colors Accessories Available Plus LJ Versailles KY 40383 Custom Logos LetteringWrite1606 873-5172 Oigao FF Duration/Murphy Continued page 170 Rubber powerrear motor peg anchors di cussion last column retention res rubber motor anchor pins begat some p pin-retention methods popping out posE pouch Otto Curth sent couple tried-and-tm solutions Otto says cements soft balsa blocks bot sides Rubber model fuselages insid model opposite motor peg holes se figure applies moisture hole balsa will swell thereby decreasin hole size retain motor peg snugly Should peg become loose fit hol once again process repeated squirtir moisture holes balsa bloel also tend retain rubber motor near cei ter model better fuselage stress distribt tion motor fully wound Otto also contributed retention method h has seen Bud Romak use First saws notcht outboard ends aluminum-tube motc pegs installs pegs fuselage H hooks rubberband peg notch o side fuselage stretches halfwa around fuselage hooks sa notch other end motor peg lik provides quick visible metho ensure precaution has complete panic launch officis flight what appears thermal formin upwind domino effect workings aton bomb no particular mystery columnist editors can relate specifi instances chain reaction confusioi has followed omission mistake misquote mislabeled photo caption like timi another some scribes may tend ignore sit uations am prefers attempt fol low up corrections soon possiblr intended pointing fingers wh dunnit sleep better night th clocks ticking unison case point report 89 USOC saw print January issue First offand probable cause some u editing confusion followedis tha yers truly inadvertently omitted AMI Class C Gas results box scores th article submitted want fix goof righ now 1989 NFFS/USOC Box Score C GasOpen 1Russ SnyderUniversal City TX 2Ed KeckWebster NY 3 Charles Caton Montgomery AL 4 Marvin Mace Seguin TX 5 Bill Dunlop Greenville PA Seconds 1758 1650 726* 1586 1002 750 apologies aboveand ma certain embarrassment Also note asterisk * following Ed Keck5 flight total Whereas posted 1650-sec score second place before official flying hour closed day went rack up 726 sec onds after deadline establish ney AMA Category III C Gas Open record cap tion beneath photo page 77 Ed hi Class C NosGas-winning Crescendo fi somewha ambiguous indicates record estab Continued page 176 174 Model Aviation CDLt5tRP Sand Tan USAF PC-32 Middlestone USAAF Tan JAPAN Mid Stone RAP ROAF PC-33 Dark Earth USAAF RAF RCAF PC-SI Blue GERMANY PC-u Azure Blue USAAF RAP RCAF GERMANY PC-Se Grey Japan Freedom 207 Proof positii F, lished C NosGas C AMA Gas As know no records kept Nos Gas events am will attempt correct couple other photo captions re ceived hate mail phone calls Obviously Bob Dunhams Motorvator Bill Prenskys Shocer photos caption page 77 eligible Nos talgia Gas designs side-by-side associated photo captions declare statement should ease consternation attentive Nostalgia Gas buffs actuality Dunhams pictured model won AMA Gas event however did win third place NosGas Class scaled-down Taibi-designed Spacer Although Bill Prensky placed fourth NosGas Class C Gas wasnt Shocer displaying particular photograph Finally Bob Schlarb photo caption page 77 would like know son Ralph fatherand other way around Whew hope new Franklin Spelimaster received Christmas present going prevent some glitches future next gather round shall strive get back track beginning end Zeek chronicles Till See ya downwind FF Indoor/Tenny Continued page 76 ing February 1990 motor will have D turns torque will stabilized flight motor will quite repeatable cause energy storage will standardized Torque vs time Figure 2 shows three impor tant torque values Indoor flight Begin ning launch torque model climbs until torque returns level flight torque its downhill proper rubber choice made level flight torque will linear part curve torque unwinding motor continues drop passing through critical torque minimum torque required keep prop ac tively pulling torque drops below critical range model has push prop keep rpm up model comes down faster properly adjusted model optimum prop rubber match will touch down just critical torque reached Rpm vs time Figure 3 shows rpm variations properly wound no-touch Indoor flight has optimal trim optimal match between rub ber prop ceiling height model climbs rate approximately proportional rpm until level flight torque reached point un til touchdown rpm stable unless flight disturbed critical torque reached technically perfect flight though probably wont winners unless ceil ing too rough models touch Another alternative Jim Richmond flies fairly routinely manner just described Jim will ceiling-scrub its necessary win mastery trim design flight strategy hall meteorology study air conditions site usually adequate win touching top 176 Model Aviation Microfilm time experience has mi crofilm should poured wintertime time read will almost too late poured quite lot film during midsummer difficult time based past experience Early session looked yield wouldnt good because several sheets broke shortly after lifting happens solvents havent finished evaporating before lifting film solved problem using small batterypowered fan shown photos agi tate air over poured sheet fan enough blast rippled water film strongly agitated film two three mm2700 p&z2"2121]5000 3view &awings Antique Military CiviIiar HeIicopter Sailpianes color POTO-PAKSIncludino K04UPAU climb Instead wind motor nearly maxi mum stress back turns C using tech niques discussed previous column wind
Edition: Model Aviation - 1990/04
Page Numbers: 74, 75, 169, 170, 174, 176
NFFS NEWS Free Flight Digest official monthly publication National Free Flight Society NFFS has new editor person Chris Weinrich Bob Meuser Model Aviation s Free Flight Duration columnist years also performing editor Redacteur en Chef Digest some 18 yearsand doing admirable job Bob nounced change editorship formal letter various newsletter editors maga zine columnists think should thank Bob past service NFFS wish him well future endeavors Chris Weinrich will henceforth accepting associated correspondence Digest 905 West 5th Ave Olympia WA 98502 Welcome aboard Chris NFFS also has new Membership Chair man Nat Comfort replaced Sal Fruciano January 1990 Sal served about two years volunteer capacity efforts appreciated well Nat enthusiastic East Coast Free Flighter will receiving new membership applica tions 12324 Percival St Chester VA 23831 appears Nat will quite busy year processing sudden upswing new NFFS memberships Free Flighters showing creasing support recent efforts revi talized NFFS understand 60% increase new memberships 1989 lets see can surpassed 1990 annual mem bership fee $15but $750 un der 18 years age havent done yet join renew today As Irish ancestors would say Free Flight Go Bragh Free Flight Forever sad note Carl Fries cofounder NFFS organization left us December 7 1989 age 74 Uncle Carl fondly called formed NFFS along Dick Black 1966/67 time frame sole purpose promoting Free Flight competition talked congenial friendly man Lawrenceville last summer ecstatic over concept NFFS/USOC resultant re sponse signified tremendous turnout con testants interpreted positive show hands beloved Free Flight hobby Lets keep going its great said Now Free Flight mourns friend Farewell God bless Uncle Carl Free Flight Nats week1990 week-long 1990 USOC/AMA Nats Lawrenceville IL mid-October will include NFFS Nostalgia Gas National Champs well two previous NFFS NosGas champs have staged con junction Society Antique Modelers annual SAM Champs first instigated Bob Larsh 1988 SAM Champs Law renceville IL carried through Ralph Prey 89 SAM Champs Jean NV Meanwhile NFFS-sponsored USOC Unit ed States Outdoor Champs concept evolved separate root different reasons its ini tial competition took place June 1989 Nos talgia Gas events carded six events week-long affair package drew amazing number entrants Due success interest con solidating two NFFS activities parties volved have agreed future home NFFS NosGas Champs should hereafter fall un der umbrella annual NFFS-sponsored United States Outdoor Champs possi ble Whereas 1990 NFFS/USOC mar ried Free Flight portion 1990 AMA Nats scheduled mid-October gathering shall now serve biggie event year 74 Model Aviation Free Flight Duration Harry Murphy 3924 Oakwood Blvd Anderson IN 460 I much-traveled model box Dale Mateer Centerville OH shows what takes serious FAI Power competition made aluminum completely lined foam Egotistic golf ers take ball go play Dale former member US FAI FF Power team Photo below shows what both Dale models look like Mark Sexton Bruce Kimball Taft CA Models V2A NosGas renditions Top Banana Ramrod respectively NosGas activity thriving everywhere S Sexton plc Dennis Phillips immaculate Civy Boy 61 covered red silk trimmed opaque light blue won NosGas Class B against 30 other entrants 89 NFFS/USOC meet Lawrenceville IL modelers have built Civy Boys never learned trim successful flights Others can three factions 1990 NosGas Champs schedule will clude six events hA A B C/D Ignition However popular request events will spread over five days competition rather crammed first two days case initial 89 USOC Another revision note awards will presented down roster event winners far eighth place high-entry events least third place events have tra ditionally shown lower levels participation policy will prevail other Rubber Glider Gas events AMA card well USOC manager Jim OReilly has signed Jim Bennett St Louis overall Contest Director week-long fray official dates ing October 16-20 thats Tuesday through Satur day special proclamation has issued full week Indian Summer ideal flying conditions See Some ponderings FF Gas rules still subject NFFS Nostalgia Gas some pleasing news least its pleasing writer comes pages Satellite newsletter San Valeers club Editor Ralph Prey indi cates club seriously considering chang ing flying rules area closely align NFFS NosGas rulesespecially exclusion Cox Tee Dee engines event eligibility comes pass would signify giant step toward NosGas rules uniform ity nationwide basis writer different publication spoke opposition camp questioned San Valeer proposal because replacing Tee Dee current NosGas model would probably result combo being ineffective use future AMA Gas competition Well should certainly hope did miss something Gee thought whole idea NosGas activ ity support laid-back vintage glowpowered competition contrast current AMA/FAI Power scrambles instance Cox Tee Dee 049 has held modern AMA hA Class itself nearly three decades its origins dating back 1961 Thus still powerful com mercially available engine its class date Tee Dee permissiveness /2A NosGas class paralleled allowing Schnuerles larger NosGas classes certainly vintage con cept would lost Obviously latter wont happen however comparison presented offers something ponder regard merits Tee Dee ing permitted /2A NosGas Continued page 169 HUMP -WRONG SMOOTH L. BALSA FILL \ SMOOTH CORRECT STAB TRAILING EDGES FIGURE 1 CORRECTED WRONG Gil Morris have model flew very well until put powerful engine problem occurs during power portion flight maybe its caused trailing edge stabilizer Gil Morris comments experience shed quite a bit light April 1990 75 Rick Pangell winds rubber motor neatly constructed Twin Fin P-30 great unobstructed flying site used Magnificent Mountain Men near Denver Co Youngsters Josh Pangell L Jeff Renner Rick club president Max-Out newsletter editor Photo Perry Peterson SOFT BALSA BLOCKS Curth Bud Romak have interesting solutions loose --motor peg syndrome ADD MOISTURE IN HOLES --I---LPEGFIGURE 2 - SAW NOTCH -TUBING PEG Otto Curth REAR RUBBER-RUBBER BAND MOTOR PEG RETENTION Bud Rottiak Uncle Carl Fries co-founder NFFS passed away Decemoer stay Free Flight St Louis MO area will sorely missed Rich Sanders 1982 photo shows Carl models John Gard-designed Fl B Wakefield PreBuilt MV-i Typhoon * Designed Ron Chidgey *100% Gator RIG Products Components wing/stab tubes & adjusters canopy & cowl * 100% built up construction precision jigs * b Violetts Magnalite GB 125 used formers * Satisfaction Guaranteed WOODGRAINS INC Rt 9 Box 122 Gumming GA 30130 404-889-4758 Tim Megan Richardson Ga Residents Add 6% Sales Tax HIGH QUALITY ULTRA SWITCH HARNESS Gold contacts inside switch connectors manufactured Futaba Ultra low profile actuator Positive lock Mounting simply requires drill ing 114 inch hole 1000k tested Custom cable lengths availble upon request minimal cost ULTRA SWITCH HARNESS $1995 PLUS $250 SNIPPING & HANDUNG proper alignment mounting out board wing struts dry fitting place Once youre satisfied alignment glue struts place allow thor ough drying center section struts A-in dowels cut pro trude about /8 fuselage wing Paint dowels before gluing place Cut windshield thin plastic epoxy place model uses commer cial 1 -in rubber wheels tic wheels available Sig would considerably lightweight Fi nally install engine check center-of-gravity Flying preflight check make sure controls operate smoothly used Cox gray 5 /2 x 4-in-pitch propeller together Ace 1-in spinner Wait until no wind blowing make first flights use 30-ft lines Because greater wing area higher drag biplanes custom arily cant handle much wind other air planes compensation theres certainly nothing prettier air dont live near well-stocked hobby shop everything youll need build fly Cox Special can purchased di rectly Sig Manufacturing Company 401 South Front Street Montezuma IA 50171 Refer companys catalog costs $3 current prices stock numbers happy landings FF Duration/Murphy Continued page 75 Unless t am mistaken intent original Nostalgia Gas concept utilize engines power equivalents era well its model designs produce representative power flight characteristics associated spec ified time frame hope philosophy theorem does become lost shuffle popularity NosGas events increases time probably good spot com pliment Ralph Prey Bob Larsh maintain ing positions stern disciplinarians capacities guardians NFFS Nostagia Gas rule book Whether game toy aero planes stud poker concessions might permitted loopholer contaminated game might become either case should winnings begin shift di rection nonconformist regular basis dangers possibly some other players could become disenchanted possibly quit game altogether Ralph Bob have continually taken deliber ate steps thwart offbeat rules interpreta tions regard issuing ongoing decisions questionable designs along model con struction guidelines clarifications ac companied official NFFS Design Engine Availability lists latest information accounts avail able cost sending $175 Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Hot off presses January last Book #3 contains latest clarifications design list ings interested Contest Directors contes tants alike may wish order copies com ing contest season Also basic rule change under consid eration time proposal change NosGas Ignition event special event status official event event has around two three flying seasons has en joyed increasing participation especially Midwest NosGas buffs Whereas some have always felt vintage ignition-engine competition should appropriately fall under protective wings Society Antique Modelers SAM SAM folks have repeatedly shown little interest recognizing second half ignitionpowered erathat published kitted ignition-engine-powered designs 1942-50 years rate relatively new NosGas Ignition activity certainly signifying defi nite vital signs interest within vintagemodeling community New rule proposals AMA Gas classes seem have low ebb some time say constructive revisions required likely viable solu tions problems readily apparent Although wish present myself national guru matter observation domestic competition AMA Power classes B C D present mixed bag some geographical areas Using Midwest case point would appear past couple years event par ticipation power classes has generally fall en off considerably some larger contests Often uncontested trophies events left tables after close award ceremonies area regional conApril 1990 169 j 5 PING&HANDLING HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP CE LCE p1 OCO 14VYh p o box 5631Iresno 05 93755 tests other hand participation events once-a-year large championship competi tions held same area such AMA FF Nats 1988 USOC 1989 re sulted exact opposite What does situation imply certainly isnt matter just simple prob lem rather lot different hiccupsand some quite obvious However person ally feel pendulum local contest partic ipation will swing upward again soon comes evident will continue least week-long championship competition scheduled year adequate site within reasonable travel distance would-be contes tants entire country say because feel no urge spend time money construction large Gas mo del put Out bucks latest racing en gine spend time associated engine hopups homemade gadgetry eventual com petition small handful area competi tors However should eventual competition include shot vying award field numerous noted competitors goodly por tion national geography interest would zoom wood chips would begin fly once again agree philosophy scenario might explain seri ous modelers past champions have skipped out domestic competition seek tempt ing prestigious battles less controver sial fields offered FAT programs retrospect wish Free Flight community might have able convince some past Nats Committees recent years ex pected calibre competition directly propor tional individuals interest participation interest turn dependent ade quacy proposed battlefields Let us hope new AMA/NFFS arrange ment championship Free Flight may alleviate past situations Anyhow overdue bury animosities Eighties speed Nineties optimism better times forthcoming Well see have gotten sidetracked onto philosophical tangent felt something should said least once day may eventually come may follow course British encompass Free Flight competition /2A FATand place everything else Unlimited class feel could still light years away re quirement should continue take proper steps prevent Well have pondering too long session lets change subject TE tip tremendous velocity modern Schnuerle-engine-powered Free Flight Gas mod el permits little margin error power turned often results various strange behaviors model screams away launch own experiences have also served up some unexpected surprises have gone through various phases attempting use same ba sic model design year after year periodically installing larger powerful engines up front performance requirements continued increase engine runs became shorter case point 600-sq-in model design started life K&B Greenhead 19 now sports 40-cu-in screamer Obviously did get design accept 40 some difficulties structural revisions Most Power enthusiasts cannot seem find time build new model new engine breakthrough can probably identify example effort remain competitive Should adding power cause model go squirrelly maybe item Gilbert Morris might aid solution Its hard believe after wondering what makes high-performance model sometimes race horizontally go over top begin outside loop occurred trailing edges stabs could likely cause chis eled away top see figure rather ing continuation upper surface contour very rear stab theorized air normally separates over hump faulty trailing edge TE dense airor something causes speed up somewhatthe air attaches bev eled portion producing stab lift ordi narily would have presto diving model un der power Now look models ones have given trouble past incorporate beveled TE fix completed stab add wedge balsa top finish out up per contour stab surface Thanks Gil Coupled wing flex prob lem FF Duration April 1986 might rest problem Continued page 174 q Stock No 0PriceQty Amount Toorder ptionII HANDLING CHARGESub Total IERICAN ordor 01use 5R Card ord Handlingorder TOTAL Eblank -COD Order Name Street Address CityState2ip~ call flMasterCard ElVisa ElAmerExp Exp Date615 Card No EShip CODEMy Check enclosed $I A l Name Street Address City Stabs7in 170 Model Aviation Pedect Paint will cover dopes epoxies metals fiberglass styrofoam plastic smooth hard mar resistant finish will crack chip extremely fuel proof virtually odorless will blush excellent flow properties non PC-57 Extra Dark Sea Grey RAP RCAF Neutral Gray USAAF PC-38 Light Slate Grey RAP RCAF Green Grey-GERMANY PC-Se Dark Slate Grey RAF ROAF Army Green Japan PC4O Dark Green & Extra Dk Sea Green RAP FCAF Dark Green GERMANY PC-41 PC-43 Dead Flat Clear PC-44 Sea Blue Semi-Gloss USN PC-45 Intermediate Blue Semi-Gloss USN PC-46 Duck Egg Blue GERMANY RAF CHIP CHARTS AVAILABLE Navy Green JAPAN PC-42 Olive Drab USAAP perfect psr1fct Al PO Box 2480 usky OhIo 44870 419 797-2208 Original EZ UP% * Sun Shelters 8x8Sturdy St.l Frames Heavy Duty Fade Resistant Nylon alOxlO Canopies RedWhite Blue alOK 15Sets Up less 60 Seconds Authorized E-Z up Corp DealerNo Ropes Nothing Assemble * John Peck Leisure Products Ltd AMA 8580131 Ravenwood Road Other Sizes Colors Accessories Available Plus LJ Versailles KY 40383 Custom Logos LetteringWrite1606 873-5172 Oigao FF Duration/Murphy Continued page 170 Rubber powerrear motor peg anchors di cussion last column retention res rubber motor anchor pins begat some p pin-retention methods popping out posE pouch Otto Curth sent couple tried-and-tm solutions Otto says cements soft balsa blocks bot sides Rubber model fuselages insid model opposite motor peg holes se figure applies moisture hole balsa will swell thereby decreasin hole size retain motor peg snugly Should peg become loose fit hol once again process repeated squirtir moisture holes balsa bloel also tend retain rubber motor near cei ter model better fuselage stress distribt tion motor fully wound Otto also contributed retention method h has seen Bud Romak use First saws notcht outboard ends aluminum-tube motc pegs installs pegs fuselage H hooks rubberband peg notch o side fuselage stretches halfwa around fuselage hooks sa notch other end motor peg lik provides quick visible metho ensure precaution has complete panic launch officis flight what appears thermal formin upwind domino effect workings aton bomb no particular mystery columnist editors can relate specifi instances chain reaction confusioi has followed omission mistake misquote mislabeled photo caption like timi another some scribes may tend ignore sit uations am prefers attempt fol low up corrections soon possiblr intended pointing fingers wh dunnit sleep better night th clocks ticking unison case point report 89 USOC saw print January issue First offand probable cause some u editing confusion followedis tha yers truly inadvertently omitted AMI Class C Gas results box scores th article submitted want fix goof righ now 1989 NFFS/USOC Box Score C GasOpen 1Russ SnyderUniversal City TX 2Ed KeckWebster NY 3 Charles Caton Montgomery AL 4 Marvin Mace Seguin TX 5 Bill Dunlop Greenville PA Seconds 1758 1650 726* 1586 1002 750 apologies aboveand ma certain embarrassment Also note asterisk * following Ed Keck5 flight total Whereas posted 1650-sec score second place before official flying hour closed day went rack up 726 sec onds after deadline establish ney AMA Category III C Gas Open record cap tion beneath photo page 77 Ed hi Class C NosGas-winning Crescendo fi somewha ambiguous indicates record estab Continued page 176 174 Model Aviation CDLt5tRP Sand Tan USAF PC-32 Middlestone USAAF Tan JAPAN Mid Stone RAP ROAF PC-33 Dark Earth USAAF RAF RCAF PC-SI Blue GERMANY PC-u Azure Blue USAAF RAP RCAF GERMANY PC-Se Grey Japan Freedom 207 Proof positii F, lished C NosGas C AMA Gas As know no records kept Nos Gas events am will attempt correct couple other photo captions re ceived hate mail phone calls Obviously Bob Dunhams Motorvator Bill Prenskys Shocer photos caption page 77 eligible Nos talgia Gas designs side-by-side associated photo captions declare statement should ease consternation attentive Nostalgia Gas buffs actuality Dunhams pictured model won AMA Gas event however did win third place NosGas Class scaled-down Taibi-designed Spacer Although Bill Prensky placed fourth NosGas Class C Gas wasnt Shocer displaying particular photograph Finally Bob Schlarb photo caption page 77 would like know son Ralph fatherand other way around Whew hope new Franklin Spelimaster received Christmas present going prevent some glitches future next gather round shall strive get back track beginning end Zeek chronicles Till See ya downwind FF Indoor/Tenny Continued page 76 ing February 1990 motor will have D turns torque will stabilized flight motor will quite repeatable cause energy storage will standardized Torque vs time Figure 2 shows three impor tant torque values Indoor flight Begin ning launch torque model climbs until torque returns level flight torque its downhill proper rubber choice made level flight torque will linear part curve torque unwinding motor continues drop passing through critical torque minimum torque required keep prop ac tively pulling torque drops below critical range model has push prop keep rpm up model comes down faster properly adjusted model optimum prop rubber match will touch down just critical torque reached Rpm vs time Figure 3 shows rpm variations properly wound no-touch Indoor flight has optimal trim optimal match between rub ber prop ceiling height model climbs rate approximately proportional rpm until level flight torque reached point un til touchdown rpm stable unless flight disturbed critical torque reached technically perfect flight though probably wont winners unless ceil ing too rough models touch Another alternative Jim Richmond flies fairly routinely manner just described Jim will ceiling-scrub its necessary win mastery trim design flight strategy hall meteorology study air conditions site usually adequate win touching top 176 Model Aviation Microfilm time experience has mi crofilm should poured wintertime time read will almost too late poured quite lot film during midsummer difficult time based past experience Early session looked yield wouldnt good because several sheets broke shortly after lifting happens solvents havent finished evaporating before lifting film solved problem using small batterypowered fan shown photos agi tate air over poured sheet fan enough blast rippled water film strongly agitated film two three mm2700 p&z2"2121]5000 3view &awings Antique Military CiviIiar HeIicopter Sailpianes color POTO-PAKSIncludino K04UPAU climb Instead wind motor nearly maxi mum stress back turns C using tech niques discussed previous column wind
Edition: Model Aviation - 1990/04
Page Numbers: 74, 75, 169, 170, 174, 176
NFFS NEWS Free Flight Digest official monthly publication National Free Flight Society NFFS has new editor person Chris Weinrich Bob Meuser Model Aviation s Free Flight Duration columnist years also performing editor Redacteur en Chef Digest some 18 yearsand doing admirable job Bob nounced change editorship formal letter various newsletter editors maga zine columnists think should thank Bob past service NFFS wish him well future endeavors Chris Weinrich will henceforth accepting associated correspondence Digest 905 West 5th Ave Olympia WA 98502 Welcome aboard Chris NFFS also has new Membership Chair man Nat Comfort replaced Sal Fruciano January 1990 Sal served about two years volunteer capacity efforts appreciated well Nat enthusiastic East Coast Free Flighter will receiving new membership applica tions 12324 Percival St Chester VA 23831 appears Nat will quite busy year processing sudden upswing new NFFS memberships Free Flighters showing creasing support recent efforts revi talized NFFS understand 60% increase new memberships 1989 lets see can surpassed 1990 annual mem bership fee $15but $750 un der 18 years age havent done yet join renew today As Irish ancestors would say Free Flight Go Bragh Free Flight Forever sad note Carl Fries cofounder NFFS organization left us December 7 1989 age 74 Uncle Carl fondly called formed NFFS along Dick Black 1966/67 time frame sole purpose promoting Free Flight competition talked congenial friendly man Lawrenceville last summer ecstatic over concept NFFS/USOC resultant re sponse signified tremendous turnout con testants interpreted positive show hands beloved Free Flight hobby Lets keep going its great said Now Free Flight mourns friend Farewell God bless Uncle Carl Free Flight Nats week1990 week-long 1990 USOC/AMA Nats Lawrenceville IL mid-October will include NFFS Nostalgia Gas National Champs well two previous NFFS NosGas champs have staged con junction Society Antique Modelers annual SAM Champs first instigated Bob Larsh 1988 SAM Champs Law renceville IL carried through Ralph Prey 89 SAM Champs Jean NV Meanwhile NFFS-sponsored USOC Unit ed States Outdoor Champs concept evolved separate root different reasons its ini tial competition took place June 1989 Nos talgia Gas events carded six events week-long affair package drew amazing number entrants Due success interest con solidating two NFFS activities parties volved have agreed future home NFFS NosGas Champs should hereafter fall un der umbrella annual NFFS-sponsored United States Outdoor Champs possi ble Whereas 1990 NFFS/USOC mar ried Free Flight portion 1990 AMA Nats scheduled mid-October gathering shall now serve biggie event year 74 Model Aviation Free Flight Duration Harry Murphy 3924 Oakwood Blvd Anderson IN 460 I much-traveled model box Dale Mateer Centerville OH shows what takes serious FAI Power competition made aluminum completely lined foam Egotistic golf ers take ball go play Dale former member US FAI FF Power team Photo below shows what both Dale models look like Mark Sexton Bruce Kimball Taft CA Models V2A NosGas renditions Top Banana Ramrod respectively NosGas activity thriving everywhere S Sexton plc Dennis Phillips immaculate Civy Boy 61 covered red silk trimmed opaque light blue won NosGas Class B against 30 other entrants 89 NFFS/USOC meet Lawrenceville IL modelers have built Civy Boys never learned trim successful flights Others can three factions 1990 NosGas Champs schedule will clude six events hA A B C/D Ignition However popular request events will spread over five days competition rather crammed first two days case initial 89 USOC Another revision note awards will presented down roster event winners far eighth place high-entry events least third place events have tra ditionally shown lower levels participation policy will prevail other Rubber Glider Gas events AMA card well USOC manager Jim OReilly has signed Jim Bennett St Louis overall Contest Director week-long fray official dates ing October 16-20 thats Tuesday through Satur day special proclamation has issued full week Indian Summer ideal flying conditions See Some ponderings FF Gas rules still subject NFFS Nostalgia Gas some pleasing news least its pleasing writer comes pages Satellite newsletter San Valeers club Editor Ralph Prey indi cates club seriously considering chang ing flying rules area closely align NFFS NosGas rulesespecially exclusion Cox Tee Dee engines event eligibility comes pass would signify giant step toward NosGas rules uniform ity nationwide basis writer different publication spoke opposition camp questioned San Valeer proposal because replacing Tee Dee current NosGas model would probably result combo being ineffective use future AMA Gas competition Well should certainly hope did miss something Gee thought whole idea NosGas activ ity support laid-back vintage glowpowered competition contrast current AMA/FAI Power scrambles instance Cox Tee Dee 049 has held modern AMA hA Class itself nearly three decades its origins dating back 1961 Thus still powerful com mercially available engine its class date Tee Dee permissiveness /2A NosGas class paralleled allowing Schnuerles larger NosGas classes certainly vintage con cept would lost Obviously latter wont happen however comparison presented offers something ponder regard merits Tee Dee ing permitted /2A NosGas Continued page 169 HUMP -WRONG SMOOTH L. BALSA FILL \ SMOOTH CORRECT STAB TRAILING EDGES FIGURE 1 CORRECTED WRONG Gil Morris have model flew very well until put powerful engine problem occurs during power portion flight maybe its caused trailing edge stabilizer Gil Morris comments experience shed quite a bit light April 1990 75 Rick Pangell winds rubber motor neatly constructed Twin Fin P-30 great unobstructed flying site used Magnificent Mountain Men near Denver Co Youngsters Josh Pangell L Jeff Renner Rick club president Max-Out newsletter editor Photo Perry Peterson SOFT BALSA BLOCKS Curth Bud Romak have interesting solutions loose --motor peg syndrome ADD MOISTURE IN HOLES --I---LPEGFIGURE 2 - SAW NOTCH -TUBING PEG Otto Curth REAR RUBBER-RUBBER BAND MOTOR PEG RETENTION Bud Rottiak Uncle Carl Fries co-founder NFFS passed away Decemoer stay Free Flight St Louis MO area will sorely missed Rich Sanders 1982 photo shows Carl models John Gard-designed Fl B Wakefield PreBuilt MV-i Typhoon * Designed Ron Chidgey *100% Gator RIG Products Components wing/stab tubes & adjusters canopy & cowl * 100% built up construction precision jigs * b Violetts Magnalite GB 125 used formers * Satisfaction Guaranteed WOODGRAINS INC Rt 9 Box 122 Gumming GA 30130 404-889-4758 Tim Megan Richardson Ga Residents Add 6% Sales Tax HIGH QUALITY ULTRA SWITCH HARNESS Gold contacts inside switch connectors manufactured Futaba Ultra low profile actuator Positive lock Mounting simply requires drill ing 114 inch hole 1000k tested Custom cable lengths availble upon request minimal cost ULTRA SWITCH HARNESS $1995 PLUS $250 SNIPPING & HANDUNG proper alignment mounting out board wing struts dry fitting place Once youre satisfied alignment glue struts place allow thor ough drying center section struts A-in dowels cut pro trude about /8 fuselage wing Paint dowels before gluing place Cut windshield thin plastic epoxy place model uses commer cial 1 -in rubber wheels tic wheels available Sig would considerably lightweight Fi nally install engine check center-of-gravity Flying preflight check make sure controls operate smoothly used Cox gray 5 /2 x 4-in-pitch propeller together Ace 1-in spinner Wait until no wind blowing make first flights use 30-ft lines Because greater wing area higher drag biplanes custom arily cant handle much wind other air planes compensation theres certainly nothing prettier air dont live near well-stocked hobby shop everything youll need build fly Cox Special can purchased di rectly Sig Manufacturing Company 401 South Front Street Montezuma IA 50171 Refer companys catalog costs $3 current prices stock numbers happy landings FF Duration/Murphy Continued page 75 Unless t am mistaken intent original Nostalgia Gas concept utilize engines power equivalents era well its model designs produce representative power flight characteristics associated spec ified time frame hope philosophy theorem does become lost shuffle popularity NosGas events increases time probably good spot com pliment Ralph Prey Bob Larsh maintain ing positions stern disciplinarians capacities guardians NFFS Nostagia Gas rule book Whether game toy aero planes stud poker concessions might permitted loopholer contaminated game might become either case should winnings begin shift di rection nonconformist regular basis dangers possibly some other players could become disenchanted possibly quit game altogether Ralph Bob have continually taken deliber ate steps thwart offbeat rules interpreta tions regard issuing ongoing decisions questionable designs along model con struction guidelines clarifications ac companied official NFFS Design Engine Availability lists latest information accounts avail able cost sending $175 Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Hot off presses January last Book #3 contains latest clarifications design list ings interested Contest Directors contes tants alike may wish order copies com ing contest season Also basic rule change under consid eration time proposal change NosGas Ignition event special event status official event event has around two three flying seasons has en joyed increasing participation especially Midwest NosGas buffs Whereas some have always felt vintage ignition-engine competition should appropriately fall under protective wings Society Antique Modelers SAM SAM folks have repeatedly shown little interest recognizing second half ignitionpowered erathat published kitted ignition-engine-powered designs 1942-50 years rate relatively new NosGas Ignition activity certainly signifying defi nite vital signs interest within vintagemodeling community New rule proposals AMA Gas classes seem have low ebb some time say constructive revisions required likely viable solu tions problems readily apparent Although wish present myself national guru matter observation domestic competition AMA Power classes B C D present mixed bag some geographical areas Using Midwest case point would appear past couple years event par ticipation power classes has generally fall en off considerably some larger contests Often uncontested trophies events left tables after close award ceremonies area regional conApril 1990 169 j 5 PING&HANDLING HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP CE LCE p1 OCO 14VYh p o box 5631Iresno 05 93755 tests other hand participation events once-a-year large championship competi tions held same area such AMA FF Nats 1988 USOC 1989 re sulted exact opposite What does situation imply certainly isnt matter just simple prob lem rather lot different hiccupsand some quite obvious However person ally feel pendulum local contest partic ipation will swing upward again soon comes evident will continue least week-long championship competition scheduled year adequate site within reasonable travel distance would-be contes tants entire country say because feel no urge spend time money construction large Gas mo del put Out bucks latest racing en gine spend time associated engine hopups homemade gadgetry eventual com petition small handful area competi tors However should eventual competition include shot vying award field numerous noted competitors goodly por tion national geography interest would zoom wood chips would begin fly once again agree philosophy scenario might explain seri ous modelers past champions have skipped out domestic competition seek tempt ing prestigious battles less controver sial fields offered FAT programs retrospect wish Free Flight community might have able convince some past Nats Committees recent years ex pected calibre competition directly propor tional individuals interest participation interest turn dependent ade quacy proposed battlefields Let us hope new AMA/NFFS arrange ment championship Free Flight may alleviate past situations Anyhow overdue bury animosities Eighties speed Nineties optimism better times forthcoming Well see have gotten sidetracked onto philosophical tangent felt something should said least once day may eventually come may follow course British encompass Free Flight competition /2A FATand place everything else Unlimited class feel could still light years away re quirement should continue take proper steps prevent Well have pondering too long session lets change subject TE tip tremendous velocity modern Schnuerle-engine-powered Free Flight Gas mod el permits little margin error power turned often results various strange behaviors model screams away launch own experiences have also served up some unexpected surprises have gone through various phases attempting use same ba sic model design year after year periodically installing larger powerful engines up front performance requirements continued increase engine runs became shorter case point 600-sq-in model design started life K&B Greenhead 19 now sports 40-cu-in screamer Obviously did get design accept 40 some difficulties structural revisions Most Power enthusiasts cannot seem find time build new model new engine breakthrough can probably identify example effort remain competitive Should adding power cause model go squirrelly maybe item Gilbert Morris might aid solution Its hard believe after wondering what makes high-performance model sometimes race horizontally go over top begin outside loop occurred trailing edges stabs could likely cause chis eled away top see figure rather ing continuation upper surface contour very rear stab theorized air normally separates over hump faulty trailing edge TE dense airor something causes speed up somewhatthe air attaches bev eled portion producing stab lift ordi narily would have presto diving model un der power Now look models ones have given trouble past incorporate beveled TE fix completed stab add wedge balsa top finish out up per contour stab surface Thanks Gil Coupled wing flex prob lem FF Duration April 1986 might rest problem Continued page 174 q Stock No 0PriceQty Amount Toorder ptionII HANDLING CHARGESub Total IERICAN ordor 01use 5R Card ord Handlingorder TOTAL Eblank -COD Order Name Street Address CityState2ip~ call flMasterCard ElVisa ElAmerExp Exp Date615 Card No EShip CODEMy Check enclosed $I A l Name Street Address City Stabs7in 170 Model Aviation Pedect Paint will cover dopes epoxies metals fiberglass styrofoam plastic smooth hard mar resistant finish will crack chip extremely fuel proof virtually odorless will blush excellent flow properties non PC-57 Extra Dark Sea Grey RAP RCAF Neutral Gray USAAF PC-38 Light Slate Grey RAP RCAF Green Grey-GERMANY PC-Se Dark Slate Grey RAF ROAF Army Green Japan PC4O Dark Green & Extra Dk Sea Green RAP FCAF Dark Green GERMANY PC-41 PC-43 Dead Flat Clear PC-44 Sea Blue Semi-Gloss USN PC-45 Intermediate Blue Semi-Gloss USN PC-46 Duck Egg Blue GERMANY RAF CHIP CHARTS AVAILABLE Navy Green JAPAN PC-42 Olive Drab USAAP perfect psr1fct Al PO Box 2480 usky OhIo 44870 419 797-2208 Original EZ UP% * Sun Shelters 8x8Sturdy St.l Frames Heavy Duty Fade Resistant Nylon alOxlO Canopies RedWhite Blue alOK 15Sets Up less 60 Seconds Authorized E-Z up Corp DealerNo Ropes Nothing Assemble * John Peck Leisure Products Ltd AMA 8580131 Ravenwood Road Other Sizes Colors Accessories Available Plus LJ Versailles KY 40383 Custom Logos LetteringWrite1606 873-5172 Oigao FF Duration/Murphy Continued page 170 Rubber powerrear motor peg anchors di cussion last column retention res rubber motor anchor pins begat some p pin-retention methods popping out posE pouch Otto Curth sent couple tried-and-tm solutions Otto says cements soft balsa blocks bot sides Rubber model fuselages insid model opposite motor peg holes se figure applies moisture hole balsa will swell thereby decreasin hole size retain motor peg snugly Should peg become loose fit hol once again process repeated squirtir moisture holes balsa bloel also tend retain rubber motor near cei ter model better fuselage stress distribt tion motor fully wound Otto also contributed retention method h has seen Bud Romak use First saws notcht outboard ends aluminum-tube motc pegs installs pegs fuselage H hooks rubberband peg notch o side fuselage stretches halfwa around fuselage hooks sa notch other end motor peg lik provides quick visible metho ensure precaution has complete panic launch officis flight what appears thermal formin upwind domino effect workings aton bomb no particular mystery columnist editors can relate specifi instances chain reaction confusioi has followed omission mistake misquote mislabeled photo caption like timi another some scribes may tend ignore sit uations am prefers attempt fol low up corrections soon possiblr intended pointing fingers wh dunnit sleep better night th clocks ticking unison case point report 89 USOC saw print January issue First offand probable cause some u editing confusion followedis tha yers truly inadvertently omitted AMI Class C Gas results box scores th article submitted want fix goof righ now 1989 NFFS/USOC Box Score C GasOpen 1Russ SnyderUniversal City TX 2Ed KeckWebster NY 3 Charles Caton Montgomery AL 4 Marvin Mace Seguin TX 5 Bill Dunlop Greenville PA Seconds 1758 1650 726* 1586 1002 750 apologies aboveand ma certain embarrassment Also note asterisk * following Ed Keck5 flight total Whereas posted 1650-sec score second place before official flying hour closed day went rack up 726 sec onds after deadline establish ney AMA Category III C Gas Open record cap tion beneath photo page 77 Ed hi Class C NosGas-winning Crescendo fi somewha ambiguous indicates record estab Continued page 176 174 Model Aviation CDLt5tRP Sand Tan USAF PC-32 Middlestone USAAF Tan JAPAN Mid Stone RAP ROAF PC-33 Dark Earth USAAF RAF RCAF PC-SI Blue GERMANY PC-u Azure Blue USAAF RAP RCAF GERMANY PC-Se Grey Japan Freedom 207 Proof positii F, lished C NosGas C AMA Gas As know no records kept Nos Gas events am will attempt correct couple other photo captions re ceived hate mail phone calls Obviously Bob Dunhams Motorvator Bill Prenskys Shocer photos caption page 77 eligible Nos talgia Gas designs side-by-side associated photo captions declare statement should ease consternation attentive Nostalgia Gas buffs actuality Dunhams pictured model won AMA Gas event however did win third place NosGas Class scaled-down Taibi-designed Spacer Although Bill Prensky placed fourth NosGas Class C Gas wasnt Shocer displaying particular photograph Finally Bob Schlarb photo caption page 77 would like know son Ralph fatherand other way around Whew hope new Franklin Spelimaster received Christmas present going prevent some glitches future next gather round shall strive get back track beginning end Zeek chronicles Till See ya downwind FF Indoor/Tenny Continued page 76 ing February 1990 motor will have D turns torque will stabilized flight motor will quite repeatable cause energy storage will standardized Torque vs time Figure 2 shows three impor tant torque values Indoor flight Begin ning launch torque model climbs until torque returns level flight torque its downhill proper rubber choice made level flight torque will linear part curve torque unwinding motor continues drop passing through critical torque minimum torque required keep prop ac tively pulling torque drops below critical range model has push prop keep rpm up model comes down faster properly adjusted model optimum prop rubber match will touch down just critical torque reached Rpm vs time Figure 3 shows rpm variations properly wound no-touch Indoor flight has optimal trim optimal match between rub ber prop ceiling height model climbs rate approximately proportional rpm until level flight torque reached point un til touchdown rpm stable unless flight disturbed critical torque reached technically perfect flight though probably wont winners unless ceil ing too rough models touch Another alternative Jim Richmond flies fairly routinely manner just described Jim will ceiling-scrub its necessary win mastery trim design flight strategy hall meteorology study air conditions site usually adequate win touching top 176 Model Aviation Microfilm time experience has mi crofilm should poured wintertime time read will almost too late poured quite lot film during midsummer difficult time based past experience Early session looked yield wouldnt good because several sheets broke shortly after lifting happens solvents havent finished evaporating before lifting film solved problem using small batterypowered fan shown photos agi tate air over poured sheet fan enough blast rippled water film strongly agitated film two three mm2700 p&z2"2121]5000 3view &awings Antique Military CiviIiar HeIicopter Sailpianes color POTO-PAKSIncludino K04UPAU climb Instead wind motor nearly maxi mum stress back turns C using tech niques discussed previous column wind
Edition: Model Aviation - 1990/04
Page Numbers: 74, 75, 169, 170, 174, 176
NFFS NEWS Free Flight Digest official monthly publication National Free Flight Society NFFS has new editor person Chris Weinrich Bob Meuser Model Aviation s Free Flight Duration columnist years also performing editor Redacteur en Chef Digest some 18 yearsand doing admirable job Bob nounced change editorship formal letter various newsletter editors maga zine columnists think should thank Bob past service NFFS wish him well future endeavors Chris Weinrich will henceforth accepting associated correspondence Digest 905 West 5th Ave Olympia WA 98502 Welcome aboard Chris NFFS also has new Membership Chair man Nat Comfort replaced Sal Fruciano January 1990 Sal served about two years volunteer capacity efforts appreciated well Nat enthusiastic East Coast Free Flighter will receiving new membership applica tions 12324 Percival St Chester VA 23831 appears Nat will quite busy year processing sudden upswing new NFFS memberships Free Flighters showing creasing support recent efforts revi talized NFFS understand 60% increase new memberships 1989 lets see can surpassed 1990 annual mem bership fee $15but $750 un der 18 years age havent done yet join renew today As Irish ancestors would say Free Flight Go Bragh Free Flight Forever sad note Carl Fries cofounder NFFS organization left us December 7 1989 age 74 Uncle Carl fondly called formed NFFS along Dick Black 1966/67 time frame sole purpose promoting Free Flight competition talked congenial friendly man Lawrenceville last summer ecstatic over concept NFFS/USOC resultant re sponse signified tremendous turnout con testants interpreted positive show hands beloved Free Flight hobby Lets keep going its great said Now Free Flight mourns friend Farewell God bless Uncle Carl Free Flight Nats week1990 week-long 1990 USOC/AMA Nats Lawrenceville IL mid-October will include NFFS Nostalgia Gas National Champs well two previous NFFS NosGas champs have staged con junction Society Antique Modelers annual SAM Champs first instigated Bob Larsh 1988 SAM Champs Law renceville IL carried through Ralph Prey 89 SAM Champs Jean NV Meanwhile NFFS-sponsored USOC Unit ed States Outdoor Champs concept evolved separate root different reasons its ini tial competition took place June 1989 Nos talgia Gas events carded six events week-long affair package drew amazing number entrants Due success interest con solidating two NFFS activities parties volved have agreed future home NFFS NosGas Champs should hereafter fall un der umbrella annual NFFS-sponsored United States Outdoor Champs possi ble Whereas 1990 NFFS/USOC mar ried Free Flight portion 1990 AMA Nats scheduled mid-October gathering shall now serve biggie event year 74 Model Aviation Free Flight Duration Harry Murphy 3924 Oakwood Blvd Anderson IN 460 I much-traveled model box Dale Mateer Centerville OH shows what takes serious FAI Power competition made aluminum completely lined foam Egotistic golf ers take ball go play Dale former member US FAI FF Power team Photo below shows what both Dale models look like Mark Sexton Bruce Kimball Taft CA Models V2A NosGas renditions Top Banana Ramrod respectively NosGas activity thriving everywhere S Sexton plc Dennis Phillips immaculate Civy Boy 61 covered red silk trimmed opaque light blue won NosGas Class B against 30 other entrants 89 NFFS/USOC meet Lawrenceville IL modelers have built Civy Boys never learned trim successful flights Others can three factions 1990 NosGas Champs schedule will clude six events hA A B C/D Ignition However popular request events will spread over five days competition rather crammed first two days case initial 89 USOC Another revision note awards will presented down roster event winners far eighth place high-entry events least third place events have tra ditionally shown lower levels participation policy will prevail other Rubber Glider Gas events AMA card well USOC manager Jim OReilly has signed Jim Bennett St Louis overall Contest Director week-long fray official dates ing October 16-20 thats Tuesday through Satur day special proclamation has issued full week Indian Summer ideal flying conditions See Some ponderings FF Gas rules still subject NFFS Nostalgia Gas some pleasing news least its pleasing writer comes pages Satellite newsletter San Valeers club Editor Ralph Prey indi cates club seriously considering chang ing flying rules area closely align NFFS NosGas rulesespecially exclusion Cox Tee Dee engines event eligibility comes pass would signify giant step toward NosGas rules uniform ity nationwide basis writer different publication spoke opposition camp questioned San Valeer proposal because replacing Tee Dee current NosGas model would probably result combo being ineffective use future AMA Gas competition Well should certainly hope did miss something Gee thought whole idea NosGas activ ity support laid-back vintage glowpowered competition contrast current AMA/FAI Power scrambles instance Cox Tee Dee 049 has held modern AMA hA Class itself nearly three decades its origins dating back 1961 Thus still powerful com mercially available engine its class date Tee Dee permissiveness /2A NosGas class paralleled allowing Schnuerles larger NosGas classes certainly vintage con cept would lost Obviously latter wont happen however comparison presented offers something ponder regard merits Tee Dee ing permitted /2A NosGas Continued page 169 HUMP -WRONG SMOOTH L. BALSA FILL \ SMOOTH CORRECT STAB TRAILING EDGES FIGURE 1 CORRECTED WRONG Gil Morris have model flew very well until put powerful engine problem occurs during power portion flight maybe its caused trailing edge stabilizer Gil Morris comments experience shed quite a bit light April 1990 75 Rick Pangell winds rubber motor neatly constructed Twin Fin P-30 great unobstructed flying site used Magnificent Mountain Men near Denver Co Youngsters Josh Pangell L Jeff Renner Rick club president Max-Out newsletter editor Photo Perry Peterson SOFT BALSA BLOCKS Curth Bud Romak have interesting solutions loose --motor peg syndrome ADD MOISTURE IN HOLES --I---LPEGFIGURE 2 - SAW NOTCH -TUBING PEG Otto Curth REAR RUBBER-RUBBER BAND MOTOR PEG RETENTION Bud Rottiak Uncle Carl Fries co-founder NFFS passed away Decemoer stay Free Flight St Louis MO area will sorely missed Rich Sanders 1982 photo shows Carl models John Gard-designed Fl B Wakefield PreBuilt MV-i Typhoon * Designed Ron Chidgey *100% Gator RIG Products Components wing/stab tubes & adjusters canopy & cowl * 100% built up construction precision jigs * b Violetts Magnalite GB 125 used formers * Satisfaction Guaranteed WOODGRAINS INC Rt 9 Box 122 Gumming GA 30130 404-889-4758 Tim Megan Richardson Ga Residents Add 6% Sales Tax HIGH QUALITY ULTRA SWITCH HARNESS Gold contacts inside switch connectors manufactured Futaba Ultra low profile actuator Positive lock Mounting simply requires drill ing 114 inch hole 1000k tested Custom cable lengths availble upon request minimal cost ULTRA SWITCH HARNESS $1995 PLUS $250 SNIPPING & HANDUNG proper alignment mounting out board wing struts dry fitting place Once youre satisfied alignment glue struts place allow thor ough drying center section struts A-in dowels cut pro trude about /8 fuselage wing Paint dowels before gluing place Cut windshield thin plastic epoxy place model uses commer cial 1 -in rubber wheels tic wheels available Sig would considerably lightweight Fi nally install engine check center-of-gravity Flying preflight check make sure controls operate smoothly used Cox gray 5 /2 x 4-in-pitch propeller together Ace 1-in spinner Wait until no wind blowing make first flights use 30-ft lines Because greater wing area higher drag biplanes custom arily cant handle much wind other air planes compensation theres certainly nothing prettier air dont live near well-stocked hobby shop everything youll need build fly Cox Special can purchased di rectly Sig Manufacturing Company 401 South Front Street Montezuma IA 50171 Refer companys catalog costs $3 current prices stock numbers happy landings FF Duration/Murphy Continued page 75 Unless t am mistaken intent original Nostalgia Gas concept utilize engines power equivalents era well its model designs produce representative power flight characteristics associated spec ified time frame hope philosophy theorem does become lost shuffle popularity NosGas events increases time probably good spot com pliment Ralph Prey Bob Larsh maintain ing positions stern disciplinarians capacities guardians NFFS Nostagia Gas rule book Whether game toy aero planes stud poker concessions might permitted loopholer contaminated game might become either case should winnings begin shift di rection nonconformist regular basis dangers possibly some other players could become disenchanted possibly quit game altogether Ralph Bob have continually taken deliber ate steps thwart offbeat rules interpreta tions regard issuing ongoing decisions questionable designs along model con struction guidelines clarifications ac companied official NFFS Design Engine Availability lists latest information accounts avail able cost sending $175 Bob Larsh 45 South Whitcomb Ave Indianapolis IN 46241 Hot off presses January last Book #3 contains latest clarifications design list ings interested Contest Directors contes tants alike may wish order copies com ing contest season Also basic rule change under consid eration time proposal change NosGas Ignition event special event status official event event has around two three flying seasons has en joyed increasing participation especially Midwest NosGas buffs Whereas some have always felt vintage ignition-engine competition should appropriately fall under protective wings Society Antique Modelers SAM SAM folks have repeatedly shown little interest recognizing second half ignitionpowered erathat published kitted ignition-engine-powered designs 1942-50 years rate relatively new NosGas Ignition activity certainly signifying defi nite vital signs interest within vintagemodeling community New rule proposals AMA Gas classes seem have low ebb some time say constructive revisions required likely viable solu tions problems readily apparent Although wish present myself national guru matter observation domestic competition AMA Power classes B C D present mixed bag some geographical areas Using Midwest case point would appear past couple years event par ticipation power classes has generally fall en off considerably some larger contests Often uncontested trophies events left tables after close award ceremonies area regional conApril 1990 169 j 5 PING&HANDLING HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP CE LCE p1 OCO 14VYh p o box 5631Iresno 05 93755 tests other hand participation events once-a-year large championship competi tions held same area such AMA FF Nats 1988 USOC 1989 re sulted exact opposite What does situation imply certainly isnt matter just simple prob lem rather lot different hiccupsand some quite obvious However person ally feel pendulum local contest partic ipation will swing upward again soon comes evident will continue least week-long championship competition scheduled year adequate site within reasonable travel distance would-be contes tants entire country say because feel no urge spend time money construction large Gas mo del put Out bucks latest racing en gine spend time associated engine hopups homemade gadgetry eventual com petition small handful area competi tors However should eventual competition include shot vying award field numerous noted competitors goodly por tion national geography interest would zoom wood chips would begin fly once again agree philosophy scenario might explain seri ous modelers past champions have skipped out domestic competition seek tempt ing prestigious battles less controver sial fields offered FAT programs retrospect wish Free Flight community might have able convince some past Nats Committees recent years ex pected calibre competition directly propor tional individuals interest participation interest turn dependent ade quacy proposed battlefields Let us hope new AMA/NFFS arrange ment championship Free Flight may alleviate past situations Anyhow overdue bury animosities Eighties speed Nineties optimism better times forthcoming Well see have gotten sidetracked onto philosophical tangent felt something should said least once day may eventually come may follow course British encompass Free Flight competition /2A FATand place everything else Unlimited class feel could still light years away re quirement should continue take proper steps prevent Well have pondering too long session lets change subject TE tip tremendous velocity modern Schnuerle-engine-powered Free Flight Gas mod el permits little margin error power turned often results various strange behaviors model screams away launch own experiences have also served up some unexpected surprises have gone through various phases attempting use same ba sic model design year after year periodically installing larger powerful engines up front performance requirements continued increase engine runs became shorter case point 600-sq-in model design started life K&B Greenhead 19 now sports 40-cu-in screamer Obviously did get design accept 40 some difficulties structural revisions Most Power enthusiasts cannot seem find time build new model new engine breakthrough can probably identify example effort remain competitive Should adding power cause model go squirrelly maybe item Gilbert Morris might aid solution Its hard believe after wondering what makes high-performance model sometimes race horizontally go over top begin outside loop occurred trailing edges stabs could likely cause chis eled away top see figure rather ing continuation upper surface contour very rear stab theorized air normally separates over hump faulty trailing edge TE dense airor something causes speed up somewhatthe air attaches bev eled portion producing stab lift ordi narily would have presto diving model un der power Now look models ones have given trouble past incorporate beveled TE fix completed stab add wedge balsa top finish out up per contour stab surface Thanks Gil Coupled wing flex prob lem FF Duration April 1986 might rest problem Continued page 174 q Stock No 0PriceQty Amount Toorder ptionII HANDLING CHARGESub Total IERICAN ordor 01use 5R Card ord Handlingorder TOTAL Eblank -COD Order Name Street Address CityState2ip~ call flMasterCard ElVisa ElAmerExp Exp Date615 Card No EShip CODEMy Check enclosed $I A l Name Street Address City Stabs7in 170 Model Aviation Pedect Paint will cover dopes epoxies metals fiberglass styrofoam plastic smooth hard mar resistant finish will crack chip extremely fuel proof virtually odorless will blush excellent flow properties non PC-57 Extra Dark Sea Grey RAP RCAF Neutral Gray USAAF PC-38 Light Slate Grey RAP RCAF Green Grey-GERMANY PC-Se Dark Slate Grey RAF ROAF Army Green Japan PC4O Dark Green & Extra Dk Sea Green RAP FCAF Dark Green GERMANY PC-41 PC-43 Dead Flat Clear PC-44 Sea Blue Semi-Gloss USN PC-45 Intermediate Blue Semi-Gloss USN PC-46 Duck Egg Blue GERMANY RAF CHIP CHARTS AVAILABLE Navy Green JAPAN PC-42 Olive Drab USAAP perfect psr1fct Al PO Box 2480 usky OhIo 44870 419 797-2208 Original EZ UP% * Sun Shelters 8x8Sturdy St.l Frames Heavy Duty Fade Resistant Nylon alOxlO Canopies RedWhite Blue alOK 15Sets Up less 60 Seconds Authorized E-Z up Corp DealerNo Ropes Nothing Assemble * John Peck Leisure Products Ltd AMA 8580131 Ravenwood Road Other Sizes Colors Accessories Available Plus LJ Versailles KY 40383 Custom Logos LetteringWrite1606 873-5172 Oigao FF Duration/Murphy Continued page 170 Rubber powerrear motor peg anchors di cussion last column retention res rubber motor anchor pins begat some p pin-retention methods popping out posE pouch Otto Curth sent couple tried-and-tm solutions Otto says cements soft balsa blocks bot sides Rubber model fuselages insid model opposite motor peg holes se figure applies moisture hole balsa will swell thereby decreasin hole size retain motor peg snugly Should peg become loose fit hol once again process repeated squirtir moisture holes balsa bloel also tend retain rubber motor near cei ter model better fuselage stress distribt tion motor fully wound Otto also contributed retention method h has seen Bud Romak use First saws notcht outboard ends aluminum-tube motc pegs installs pegs fuselage H hooks rubberband peg notch o side fuselage stretches halfwa around fuselage hooks sa notch other end motor peg lik provides quick visible metho ensure precaution has complete panic launch officis flight what appears thermal formin upwind domino effect workings aton bomb no particular mystery columnist editors can relate specifi instances chain reaction confusioi has followed omission mistake misquote mislabeled photo caption like timi another some scribes may tend ignore sit uations am prefers attempt fol low up corrections soon possiblr intended pointing fingers wh dunnit sleep better night th clocks ticking unison case point report 89 USOC saw print January issue First offand probable cause some u editing confusion followedis tha yers truly inadvertently omitted AMI Class C Gas results box scores th article submitted want fix goof righ now 1989 NFFS/USOC Box Score C GasOpen 1Russ SnyderUniversal City TX 2Ed KeckWebster NY 3 Charles Caton Montgomery AL 4 Marvin Mace Seguin TX 5 Bill Dunlop Greenville PA Seconds 1758 1650 726* 1586 1002 750 apologies aboveand ma certain embarrassment Also note asterisk * following Ed Keck5 flight total Whereas posted 1650-sec score second place before official flying hour closed day went rack up 726 sec onds after deadline establish ney AMA Category III C Gas Open record cap tion beneath photo page 77 Ed hi Class C NosGas-winning Crescendo fi somewha ambiguous indicates record estab Continued page 176 174 Model Aviation CDLt5tRP Sand Tan USAF PC-32 Middlestone USAAF Tan JAPAN Mid Stone RAP ROAF PC-33 Dark Earth USAAF RAF RCAF PC-SI Blue GERMANY PC-u Azure Blue USAAF RAP RCAF GERMANY PC-Se Grey Japan Freedom 207 Proof positii F, lished C NosGas C AMA Gas As know no records kept Nos Gas events am will attempt correct couple other photo captions re ceived hate mail phone calls Obviously Bob Dunhams Motorvator Bill Prenskys Shocer photos caption page 77 eligible Nos talgia Gas designs side-by-side associated photo captions declare statement should ease consternation attentive Nostalgia Gas buffs actuality Dunhams pictured model won AMA Gas event however did win third place NosGas Class scaled-down Taibi-designed Spacer Although Bill Prensky placed fourth NosGas Class C Gas wasnt Shocer displaying particular photograph Finally Bob Schlarb photo caption page 77 would like know son Ralph fatherand other way around Whew hope new Franklin Spelimaster received Christmas present going prevent some glitches future next gather round shall strive get back track beginning end Zeek chronicles Till See ya downwind FF Indoor/Tenny Continued page 76 ing February 1990 motor will have D turns torque will stabilized flight motor will quite repeatable cause energy storage will standardized Torque vs time Figure 2 shows three impor tant torque values Indoor flight Begin ning launch torque model climbs until torque returns level flight torque its downhill proper rubber choice made level flight torque will linear part curve torque unwinding motor continues drop passing through critical torque minimum torque required keep prop ac tively pulling torque drops below critical range model has push prop keep rpm up model comes down faster properly adjusted model optimum prop rubber match will touch down just critical torque reached Rpm vs time Figure 3 shows rpm variations properly wound no-touch Indoor flight has optimal trim optimal match between rub ber prop ceiling height model climbs rate approximately proportional rpm until level flight torque reached point un til touchdown rpm stable unless flight disturbed critical torque reached technically perfect flight though probably wont winners unless ceil ing too rough models touch Another alternative Jim Richmond flies fairly routinely manner just described Jim will ceiling-scrub its necessary win mastery trim design flight strategy hall meteorology study air conditions site usually adequate win touching top 176 Model Aviation Microfilm time experience has mi crofilm should poured wintertime time read will almost too late poured quite lot film during midsummer difficult time based past experience Early session looked yield wouldnt good because several sheets broke shortly after lifting happens solvents havent finished evaporating before lifting film solved problem using small batterypowered fan shown photos agi tate air over poured sheet fan enough blast rippled water film strongly agitated film two three mm2700 p&z2"2121]5000 3view &awings Antique Military CiviIiar HeIicopter Sailpianes color POTO-PAKSIncludino K04UPAU climb Instead wind motor nearly maxi mum stress back turns C using tech niques discussed previous column wind