Like AMA members am concerned about future hobby agree AMAs philosophy introducing model aviation young people through education have suggestion another program AMA might pursue spring middle schools high schools around country sponsor science fairs Winners go compete regional state national international levels Local businesses major corporations alike sponsor awards variety categories As Army recruiter judge number fairs have always found number projects use model aviation investigate aeronautical principles suggestion Promote model aviation recognizing outstanding achievements students use model aviation science fair projects Give award recognizes Best Use Model Aviation equivalent prize could AMA youth membership subscription Model Aviation perhaps opportunity learn fly local club see primarily local effort promoted AMA clubs volunteer judge local science fair present award AMA could assist promoting program local clubs aware existed AMA could also create certificate medal create prepaid membership club could buy advance also see AMA providing promoting sort award state national level am sure finding local AMA volunteers participate program would difficult AMA promotes decision significantly lower cost youth membership cost program could remain minimal potential gain exposure hobby would worth Glenn Dean Frederick Maryland Joe Wagners May column struggling explain two-stroke engine doesnt make twice power four-stroke mentions two dissenting letters states neither came model engine manufacturer renowned expert am renowned expert nor am manufacturer am certified National Institute Automotive Service Excellence Master Automobile Technician member Society Automotive Engineers have employed automobile manufacturer Technical Service Department twenty years disagreement began Mr Wagner telling readership twostroke displacement incorrectly calculated wrote letter explaining flaws Mr Wagners argument now tries defend position preposterous notion grinding exhaust port higher comparing power output dont know theory has taken turn idea demonstrates lack understanding regard timing events two-stroke engine Raising exhaust much will course destroy engine fuel charge would expelled out exhaust port instead remaining combustion chamber during compression However have seen engines respond favorably exhaust timing changes port raised up 025 inch does square Mr Wagners explanation Mr Wagner now goes tell us another reason four-stroke can make essentially same power two-stroke says some two-strokes gross energy output has expended compressing fuel mixture crankcase true usually referred pumping loss would like point out pumping losses also occur four-stroke engines additionally fourstrokes have higher internal friction mechanical losses because valve-train requirements real answer has escaped Mr Wagner led readers down path misinformation gas exchange output internal combustion engine governed density fuel mixture combustion chamber After firing episode spent gases must cleared cylinder before fresh charge introduced four-stroke engine complete stroke piston devoted clearing exhaust gases another stroke introduce fresh charge two-stroke Continued page /89 6 Model Aviation ram Suggestion Let ters tc Editor Engine Shop Two Views cost Letters Continued page 6 engine must accomplish power stroke exhaust gases stroke piston introduce fresh charge compress next stroke inefficient results diluted fuel charge lower density spent gases can scavenged Virtually two-stroke development has centered around gaining efficiency gas exchange process port timing has such profound effect two-strokes operation tuned pipe effective An internal combustion engine basically pump volumetric efficiency tells us well pumps fuel mixture spent gases out Higher volumetric efficiency raises Brake Mean Effective Pressure BMEP determines power output Four-strokes capable producing much higher BMEP two-stroke engines reasons cited smaller engine displacements four-strokes suffer higher mechanical losses already described April issue Mr Wagner described air/fuel ratios claims gas engine needs 12 cubic inches air cubic inch fuel true couldnt fit large enough gas tank truck get around block Air/fuel ratios usually described units mass gasoline engine has stoichiometric fuel mixture 147 1 147 pounds air pound gasoline will produce best power mixture 125 1 again 125 pounds air pound fuel Perhaps some renowned experts Mr Wagner refers such Clarence Lee Bill Wisniewski George Aldrich have yet read column doubt subscribe theories Michael] Kuper Darrington Washington would like take opportunity put writing support Joe Wagners column Engine Shop seems have amazing understanding model engines 30s 40s us continue use engines need help can get Doug King Fillmore California Fox 35 Throttle direct letter person wanted put throttle Fox 35 CL engine time Fox made carb fit 35 tried couldnt make work Later made bushing tried 05 40 size airbleed carb also I I 858 Back Basics$1125 Two-Meter sailplane Kincaid spans 77 3/4 inches 859 Scepter$1125 CL Precision Aerobatics model Bhckhaus 40 engines spans 61 inches No 136Piasaler Otorob PC Scale elton 23-45 5-channel has both slots flapsC No 169Ilennypione PC version famad osbin modal kit trom t037 t5-25C No262Crashmaster CL crash-proof roman Two siaas15-35 35140 powerA No302Mini P-tO PC Sorpolos 049 doctad tan sport fliar 2 channel Balsa wings toil toselage sfroctjreB Na aai1t2A Miss Amerisa PC Old Timar /cA Taoaoo modal tar 540 glow 2 channelsC No001Gee Bee ModelS PC Goldan Aga Pacer Spans 72-in scale ton 60 power 3 plan sheets No702Heinkel BC 10 PP Scala modal 1924 Gaooan monoplane Por HiLine Mini-h geared ebootric motor Spans2fl inA No 714Mad Doak PC osan-fniandly Sport lila tar raiaaed olaw light hoods low slow moneocers 25-35 powen Spans 60 2 plan sheets2 No720Minateman PP Frank Zaios popalar all-balsa-aocarad robbar-pawarad model foken trom Snyolar Sciecce June tPdt Spans 20 inA No7331941 Tapioraraft PC poartar-ooala dasign aaptoras oniqos flying goalities toil-scale Topiororah 100-inch span 2 plan sheets. No739Joaster PC Sailplane has looks pedarmanon t22-inah span inclodes toll constrootion teatS plan sheets No709Arriba PP Hand-hold catapoit glider Jean PandrewsA No766Perbp Tee Osa Sf 5-powarad PC modal spans 20 inchesA Na 776Aersdaetpir Sooond-srap PP robber model spans 15 inches No709Cessna 100-ES Plootria sailplane OS power spans 62 inches Na 800Tease Zephpr EF ton boNPtJ isaaaks spans 56r5 inchesB Na 006Tn Pilfer PC sailplane Christenson oan loonohad three ways span 77 inchesB No007ARCOD Dafender Cbs PC Scale Daration Mathews spans 7h inahas0 Na 000Lsnah Break Olpo Sport biplane tar 1 5-25 two-slnokos spans 36 inohes S No010indicator 6 RC trainer oses molded loam wing spans 45 inchosS No9115B-70 All-shoot CL trainer/spac model need-oaloe S4Ps spans 26 inchosS No91455-35 PC Plectric hying wing msighs 46 ooncos spans 60 inches 2 sheetsP No010Topior Cabr PC Sport Scale tar three ohannols spana 56 inches No010Nibble 300 PP oP raoord haldar Nann Pall spans SSr noses No019Windspantr PC Plootric Rommnder Scam Owing spans 56 inches No021Art Chester Goser PP No-Cal Scale modol Li nstrom spans 15 isohas No022Stephens Abro PC Laser pnedooesoor Sorpolos br 32 powar spans 05 inahas No020Twister Sport PC model Piahsrdson tar 25 power spans 45 inches No026Piper Pamnee Btana PP Robber Scale Pan Stahl spans 30 inches No027Neat Step CL Aerohafios dosrgn Pyalt spans 514 inches Na 020TorSo Sport Sport twin Piectec PC Op Pobelen spans 2912 inches Na 020Piras PC span aerabafia modal 19-35 power spans 46 inches No030Bloodier Record-seflrng CL 21 Prara Spend spans 32 inches No031Strider PC Two-Mater Soaring modal Birdweii spans 707 No032Boshlip RC Trainer br 40-46 paoer spans 61 inches Na 033Peregrine CL SporySiowomoaf Op hiop spans 30 inchas. No034Goblin Piantrin apart model ton geared Speed 400 motors spans 46 inohas No030Genie Pload-gesmerry r5APIJ PP Pallet spans 54 inches No03600 Siam Motion Third lying-wing series Bill Poans spans 06 rnchns No037Preebtean CLroiner Dahikator 19-35 ongines spans 35 inches No030NSP60r Piectric PC Neoor Breaks Pmps spans 65 inches No039Smitf Old Roler PP Old-Timar asian spans 56 inches Na 040PT-3r PC Scale model Prank Ba bar spans 55 inches Na 041KA-lO CL Precision Aerobafros model Tom Sloon spans 65 inches No 042Ryan Sport Trainer PC Scala Phillip K ant asas Mao 40 Sarpass spans 60 inches No043ice Baa 20 PP Coope John Oldenkamp spans 37 inchesA No044Broabipe Assie PC sport modal Cimmino 30 45 twa-strokes spans 53 inchesC No040iransida CL Jet Speed model Jerry Thomas spans 24 inchosC No046Prafassianal Cat Pattern-style model Sarpolos ton Sacho 32 onginos spans 04 inchos 2 sheatsP No047Son Goat PC concansian CL design Cloogh spans 36 inches No004Spire CL Slant UrtnawskcAdamoska tar ST 60 p awar spans 62 inches 2 sheets Na 049Sopor Bag Mathews adaplaron classic Wait Good design 25 35 powan spans 75 inches Ne 000Osprap Wrntocdontan inteeeediate PC model spano 63 inches No001Eagierack CL Scala Prank Boon spans 40 inches No052Josef PC slope/sport glidor Alien spans 72 inahes No003Goastam 30 hats-winning PP indoor HLG Sortees spans 20 inches No004Arrampiano PC Competition Pan-Ply Larsen tar 09 -15 power spans 36 inches No009Lightoin Bolt CL Sport modal Natanband Icr 049 power 36 inchesB No006Ascender PC Sport Canard tar 40 power WinterlHonton spans 5925 inches No057Pit Chagger PP 1/26-Pt J Donflam spans 53 nosesB Full-size plan list available Complete listing piano previously published magazine through no 830 may obtained tree Charge writing enclose 780 stamped pre-addresaed #10 business-size letter envelope ModelAviation 5151 E Memorial Dr Muncie IN 47302 v32][b85318560900]] Price Key C$1125Dm$15OOE$2250 m $375 B Fill blanks below numbers plans wish order best handling please include requests payment some other service plans order order phone call 765 287-1256 order fax complete send form fax number 765 289-4248 Domestic customers please include $300 shipping handling Add $300 have plans mailed tube Please No COD Orders Make check money order payable US funds drawn US bank ModelAviation AMA 5151 East Memorial Dr Muncie IN 47302 Please allow three weeks delivery ENCLOSED $ CARD NO NAME Check Money Order J MasterCardNisa EXP DATE AMA No _____________ STREET ____ CITY __________ STATEZIP Customers outside US add $300 additional shipping handling per plan L a1 August1998189 PRE-FLIGHT Since planning ad Pre Flight Inspection asked Ken Cemy what did check planes Ken south Florida Unlimited IMAC competitor remarkable record competes Masters Full Scale Inspector Commercial Air Liners Kens List Check Following Security Also Check Attaching Screws Spinner & Propeller Cowling Landing Gear & Wheel Pants Both wings Anti Rotation Pins Ailerons Aileron Servos & Linkage Stabilizers & Elevators Elevator Servos & Linkage Vertical Fin & Rudder Tailwheel Assembly Canopy Batteries Proper Voltage Make dam sure have Full Tank Gas Tail Wire Connections Plastic Clevices Trim & Balance Radio Check Ground last four added Ken does have tail wires Precision Aviation Extra 300S hope cut Out put flight box will have reminder hopefully catch lot problems before happen Thanks Ken sharing us Bob Godfreys Precision Aviation Design P0 Box 158 Palmetto FL 34220-01 58 Phone 941-729-2971 Fax 941-729-6761 Exclusive Distributors BME Engines e-mail bobflies@mindspringcom New Web Site Under Construction Home Airplanes Bob Godfrey Designer TOOWinners didnt work Fox three modes high speed midrange off throttled CL Fox would OK hand launch Combat-type airplanes Harold Krysak Waukesha Wisconsin Prejudice prejudice against model airplanes page 146 May issue Model Aviation read Triad Aeromodelers club lost flying site because person complained noise What happened democracy majority rule same situation Carmel Valley north San Diego Palomar RC Flyers lost field because person complained field mile nearest house next Interstate 5 traffic goes roaring 24 hours day helicopters jets fly overhead Now have drive 20 miles fly instead two area full dogs running loose leaving piles against law walk around valley day health weather permitting can hear dozen dogs barking making decibels model airplanes Will dogs outlawed person complains life used fly glider Torrey Pines cost went up $100 $150 year let membership expire can fly Morley Field 10 years same price fly gas Electric now its fun dont have wait wind Francis Smith San Diego California Scale Flight Routines regard article Stan Alexander [April 19981 time Scale event airplane has gear problems its automatic reduction points Ive noticed other publications show airplane gear operating anything pilot should given extra points can get airplane down piece have flying again next round judges think full-scale airplanes dont have mechanical problems After scale events full-scale airplanes have mechanical problems cant models judges think Navy airplane has never landed carrier gear problems Come judges looking scale realism mechanical problems real gets Steve Freitag Oklahoma City Oklahoma BILL EFFINGER SAYS PIann PalternTu Sets RIC Scale Models reol roooe ooOerr 1/4 Scale RYAN STA 9006osrpoo 100023010 9005-23$2495 i/S Scale WACO SRE 83 1/2 roIOOlpOo65 23 OlD ROSS-ic$2495 9050-3512# 1/8 Scale 52 ooiosspoo 19 40 OlD 1/5 Scale LAKE RENEGADE'' AMPHIBIANt- 92 orog opoc 051095 OlD"- RCSS-902495 1/6 Scaleoso 0 russ MOTH DN-BOA 3l12'oOglpoO201040010 1/4 Scale PAGE RACER 94 1/2 ooiosspOo 30 OlD R00S-20 1/4 Scale WWI jCESSNA170 BRITISH SE-BA 1/3 010144 0609 spoc 1/4 Scale 001/4 0005 190019 0 24 OlD 5 49s ~oCURTIS GOSHAWK 01/0 roole 72 oolog 1q00FIIC2 131030010 ROQS-7 $2495 TROS DVA AERONCA c IbI 10/0 50 89 o405 1900 131023 OlD lW"",1 $2495 Onoloes 0 17 FOKKER DvliLA RD SUPER SOLUTION 50 biOs 1900 20 OlD 005i0e1 B O-P 060 90 cooloel 8 90005 5 -n oll Ieoglh NIEUPORT 28MONOCOUPE 90A . 01990 50 1/2 06001900 3 OlD 9005-15 51/3 1000 128 06091900 BRITISH SOPWITN CAMEL P1 9C304 $2995 40 54b05 1900 75 ro 23 OlD 0i0011/5 Scale 77 oI0g 1900 -4 5 001 9C051 1 5 iPIPER TRI PACER 01995 DE HAVILLAND DH-4 1 3100 e 110 1009 1000 127 06081900 31010 9005-22$29901 51000 70oiog 1p00905S301995 POKKERDR 1 FAIRCHILD24 72 060919005 I101000 721/2ooOgSpOO 9005-6024901.I~ojROSSO$1495 AL~.i 000O100Ob00O0001O0 10100 1010~00 FOKKER D-VIII"1 30000 40 1/2 bios 11000 /Vl~.j26 111 PLEASE ADD $400 shipping booIng label 84 06091900 781o23OIDeogloel 003495Send Plan Sets brochure 8105 90001902495GRUMMAN WIDGEON SPAD C-XIII0601/51001e8210051900.r W E TECHNICALSERVICES 791/4oo091900131031 OlD104019i006000r00..335 Hammond Dr. Apt 913 90058$2795SCOS-8 02995Atlanto GA 30328 190 Model Aviation ection Notice plan numbers full-size plans box Ascender LII Chugger incorrect July issue should have read 856 857 respectively
Edition: Model Aviation - 1998/08
Page Numbers: 6, 189, 190
Like AMA members am concerned about future hobby agree AMAs philosophy introducing model aviation young people through education have suggestion another program AMA might pursue spring middle schools high schools around country sponsor science fairs Winners go compete regional state national international levels Local businesses major corporations alike sponsor awards variety categories As Army recruiter judge number fairs have always found number projects use model aviation investigate aeronautical principles suggestion Promote model aviation recognizing outstanding achievements students use model aviation science fair projects Give award recognizes Best Use Model Aviation equivalent prize could AMA youth membership subscription Model Aviation perhaps opportunity learn fly local club see primarily local effort promoted AMA clubs volunteer judge local science fair present award AMA could assist promoting program local clubs aware existed AMA could also create certificate medal create prepaid membership club could buy advance also see AMA providing promoting sort award state national level am sure finding local AMA volunteers participate program would difficult AMA promotes decision significantly lower cost youth membership cost program could remain minimal potential gain exposure hobby would worth Glenn Dean Frederick Maryland Joe Wagners May column struggling explain two-stroke engine doesnt make twice power four-stroke mentions two dissenting letters states neither came model engine manufacturer renowned expert am renowned expert nor am manufacturer am certified National Institute Automotive Service Excellence Master Automobile Technician member Society Automotive Engineers have employed automobile manufacturer Technical Service Department twenty years disagreement began Mr Wagner telling readership twostroke displacement incorrectly calculated wrote letter explaining flaws Mr Wagners argument now tries defend position preposterous notion grinding exhaust port higher comparing power output dont know theory has taken turn idea demonstrates lack understanding regard timing events two-stroke engine Raising exhaust much will course destroy engine fuel charge would expelled out exhaust port instead remaining combustion chamber during compression However have seen engines respond favorably exhaust timing changes port raised up 025 inch does square Mr Wagners explanation Mr Wagner now goes tell us another reason four-stroke can make essentially same power two-stroke says some two-strokes gross energy output has expended compressing fuel mixture crankcase true usually referred pumping loss would like point out pumping losses also occur four-stroke engines additionally fourstrokes have higher internal friction mechanical losses because valve-train requirements real answer has escaped Mr Wagner led readers down path misinformation gas exchange output internal combustion engine governed density fuel mixture combustion chamber After firing episode spent gases must cleared cylinder before fresh charge introduced four-stroke engine complete stroke piston devoted clearing exhaust gases another stroke introduce fresh charge two-stroke Continued page /89 6 Model Aviation ram Suggestion Let ters tc Editor Engine Shop Two Views cost Letters Continued page 6 engine must accomplish power stroke exhaust gases stroke piston introduce fresh charge compress next stroke inefficient results diluted fuel charge lower density spent gases can scavenged Virtually two-stroke development has centered around gaining efficiency gas exchange process port timing has such profound effect two-strokes operation tuned pipe effective An internal combustion engine basically pump volumetric efficiency tells us well pumps fuel mixture spent gases out Higher volumetric efficiency raises Brake Mean Effective Pressure BMEP determines power output Four-strokes capable producing much higher BMEP two-stroke engines reasons cited smaller engine displacements four-strokes suffer higher mechanical losses already described April issue Mr Wagner described air/fuel ratios claims gas engine needs 12 cubic inches air cubic inch fuel true couldnt fit large enough gas tank truck get around block Air/fuel ratios usually described units mass gasoline engine has stoichiometric fuel mixture 147 1 147 pounds air pound gasoline will produce best power mixture 125 1 again 125 pounds air pound fuel Perhaps some renowned experts Mr Wagner refers such Clarence Lee Bill Wisniewski George Aldrich have yet read column doubt subscribe theories Michael] Kuper Darrington Washington would like take opportunity put writing support Joe Wagners column Engine Shop seems have amazing understanding model engines 30s 40s us continue use engines need help can get Doug King Fillmore California Fox 35 Throttle direct letter person wanted put throttle Fox 35 CL engine time Fox made carb fit 35 tried couldnt make work Later made bushing tried 05 40 size airbleed carb also I I 858 Back Basics$1125 Two-Meter sailplane Kincaid spans 77 3/4 inches 859 Scepter$1125 CL Precision Aerobatics model Bhckhaus 40 engines spans 61 inches No 136Piasaler Otorob PC Scale elton 23-45 5-channel has both slots flapsC No 169Ilennypione PC version famad osbin modal kit trom t037 t5-25C No262Crashmaster CL crash-proof roman Two siaas15-35 35140 powerA No302Mini P-tO PC Sorpolos 049 doctad tan sport fliar 2 channel Balsa wings toil toselage sfroctjreB Na aai1t2A Miss Amerisa PC Old Timar /cA Taoaoo modal tar 540 glow 2 channelsC No001Gee Bee ModelS PC Goldan Aga Pacer Spans 72-in scale ton 60 power 3 plan sheets No702Heinkel BC 10 PP Scala modal 1924 Gaooan monoplane Por HiLine Mini-h geared ebootric motor Spans2fl inA No 714Mad Doak PC osan-fniandly Sport lila tar raiaaed olaw light hoods low slow moneocers 25-35 powen Spans 60 2 plan sheets2 No720Minateman PP Frank Zaios popalar all-balsa-aocarad robbar-pawarad model foken trom Snyolar Sciecce June tPdt Spans 20 inA No7331941 Tapioraraft PC poartar-ooala dasign aaptoras oniqos flying goalities toil-scale Topiororah 100-inch span 2 plan sheets. No739Joaster PC Sailplane has looks pedarmanon t22-inah span inclodes toll constrootion teatS plan sheets No709Arriba PP Hand-hold catapoit glider Jean PandrewsA No766Perbp Tee Osa Sf 5-powarad PC modal spans 20 inchesA Na 776Aersdaetpir Sooond-srap PP robber model spans 15 inches No709Cessna 100-ES Plootria sailplane OS power spans 62 inches Na 800Tease Zephpr EF ton boNPtJ isaaaks spans 56r5 inchesB Na 006Tn Pilfer PC sailplane Christenson oan loonohad three ways span 77 inchesB No007ARCOD Dafender Cbs PC Scale Daration Mathews spans 7h inahas0 Na 000Lsnah Break Olpo Sport biplane tar 1 5-25 two-slnokos spans 36 inohes S No010indicator 6 RC trainer oses molded loam wing spans 45 inchosS No9115B-70 All-shoot CL trainer/spac model need-oaloe S4Ps spans 26 inchosS No91455-35 PC Plectric hying wing msighs 46 ooncos spans 60 inches 2 sheetsP No010Topior Cabr PC Sport Scale tar three ohannols spana 56 inches No010Nibble 300 PP oP raoord haldar Nann Pall spans SSr noses No019Windspantr PC Plootric Rommnder Scam Owing spans 56 inches No021Art Chester Goser PP No-Cal Scale modol Li nstrom spans 15 isohas No022Stephens Abro PC Laser pnedooesoor Sorpolos br 32 powar spans 05 inahas No020Twister Sport PC model Piahsrdson tar 25 power spans 45 inches No026Piper Pamnee Btana PP Robber Scale Pan Stahl spans 30 inches No027Neat Step CL Aerohafios dosrgn Pyalt spans 514 inches Na 020TorSo Sport Sport twin Piectec PC Op Pobelen spans 2912 inches Na 020Piras PC span aerabafia modal 19-35 power spans 46 inches No030Bloodier Record-seflrng CL 21 Prara Spend spans 32 inches No031Strider PC Two-Mater Soaring modal Birdweii spans 707 No032Boshlip RC Trainer br 40-46 paoer spans 61 inches Na 033Peregrine CL SporySiowomoaf Op hiop spans 30 inchas. No034Goblin Piantrin apart model ton geared Speed 400 motors spans 46 inohas No030Genie Pload-gesmerry r5APIJ PP Pallet spans 54 inches No03600 Siam Motion Third lying-wing series Bill Poans spans 06 rnchns No037Preebtean CLroiner Dahikator 19-35 ongines spans 35 inches No030NSP60r Piectric PC Neoor Breaks Pmps spans 65 inches No039Smitf Old Roler PP Old-Timar asian spans 56 inches Na 040PT-3r PC Scale model Prank Ba bar spans 55 inches Na 041KA-lO CL Precision Aerobafros model Tom Sloon spans 65 inches No 042Ryan Sport Trainer PC Scala Phillip K ant asas Mao 40 Sarpass spans 60 inches No043ice Baa 20 PP Coope John Oldenkamp spans 37 inchesA No044Broabipe Assie PC sport modal Cimmino 30 45 twa-strokes spans 53 inchesC No040iransida CL Jet Speed model Jerry Thomas spans 24 inchosC No046Prafassianal Cat Pattern-style model Sarpolos ton Sacho 32 onginos spans 04 inchos 2 sheatsP No047Son Goat PC concansian CL design Cloogh spans 36 inches No004Spire CL Slant UrtnawskcAdamoska tar ST 60 p awar spans 62 inches 2 sheets Na 049Sopor Bag Mathews adaplaron classic Wait Good design 25 35 powan spans 75 inches Ne 000Osprap Wrntocdontan inteeeediate PC model spano 63 inches No001Eagierack CL Scala Prank Boon spans 40 inches No052Josef PC slope/sport glidor Alien spans 72 inahes No003Goastam 30 hats-winning PP indoor HLG Sortees spans 20 inches No004Arrampiano PC Competition Pan-Ply Larsen tar 09 -15 power spans 36 inches No009Lightoin Bolt CL Sport modal Natanband Icr 049 power 36 inchesB No006Ascender PC Sport Canard tar 40 power WinterlHonton spans 5925 inches No057Pit Chagger PP 1/26-Pt J Donflam spans 53 nosesB Full-size plan list available Complete listing piano previously published magazine through no 830 may obtained tree Charge writing enclose 780 stamped pre-addresaed #10 business-size letter envelope ModelAviation 5151 E Memorial Dr Muncie IN 47302 v32][b85318560900]] Price Key C$1125Dm$15OOE$2250 m $375 B Fill blanks below numbers plans wish order best handling please include requests payment some other service plans order order phone call 765 287-1256 order fax complete send form fax number 765 289-4248 Domestic customers please include $300 shipping handling Add $300 have plans mailed tube Please No COD Orders Make check money order payable US funds drawn US bank ModelAviation AMA 5151 East Memorial Dr Muncie IN 47302 Please allow three weeks delivery ENCLOSED $ CARD NO NAME Check Money Order J MasterCardNisa EXP DATE AMA No _____________ STREET ____ CITY __________ STATEZIP Customers outside US add $300 additional shipping handling per plan L a1 August1998189 PRE-FLIGHT Since planning ad Pre Flight Inspection asked Ken Cemy what did check planes Ken south Florida Unlimited IMAC competitor remarkable record competes Masters Full Scale Inspector Commercial Air Liners Kens List Check Following Security Also Check Attaching Screws Spinner & Propeller Cowling Landing Gear & Wheel Pants Both wings Anti Rotation Pins Ailerons Aileron Servos & Linkage Stabilizers & Elevators Elevator Servos & Linkage Vertical Fin & Rudder Tailwheel Assembly Canopy Batteries Proper Voltage Make dam sure have Full Tank Gas Tail Wire Connections Plastic Clevices Trim & Balance Radio Check Ground last four added Ken does have tail wires Precision Aviation Extra 300S hope cut Out put flight box will have reminder hopefully catch lot problems before happen Thanks Ken sharing us Bob Godfreys Precision Aviation Design P0 Box 158 Palmetto FL 34220-01 58 Phone 941-729-2971 Fax 941-729-6761 Exclusive Distributors BME Engines e-mail bobflies@mindspringcom New Web Site Under Construction Home Airplanes Bob Godfrey Designer TOOWinners didnt work Fox three modes high speed midrange off throttled CL Fox would OK hand launch Combat-type airplanes Harold Krysak Waukesha Wisconsin Prejudice prejudice against model airplanes page 146 May issue Model Aviation read Triad Aeromodelers club lost flying site because person complained noise What happened democracy majority rule same situation Carmel Valley north San Diego Palomar RC Flyers lost field because person complained field mile nearest house next Interstate 5 traffic goes roaring 24 hours day helicopters jets fly overhead Now have drive 20 miles fly instead two area full dogs running loose leaving piles against law walk around valley day health weather permitting can hear dozen dogs barking making decibels model airplanes Will dogs outlawed person complains life used fly glider Torrey Pines cost went up $100 $150 year let membership expire can fly Morley Field 10 years same price fly gas Electric now its fun dont have wait wind Francis Smith San Diego California Scale Flight Routines regard article Stan Alexander [April 19981 time Scale event airplane has gear problems its automatic reduction points Ive noticed other publications show airplane gear operating anything pilot should given extra points can get airplane down piece have flying again next round judges think full-scale airplanes dont have mechanical problems After scale events full-scale airplanes have mechanical problems cant models judges think Navy airplane has never landed carrier gear problems Come judges looking scale realism mechanical problems real gets Steve Freitag Oklahoma City Oklahoma BILL EFFINGER SAYS PIann PalternTu Sets RIC Scale Models reol roooe ooOerr 1/4 Scale RYAN STA 9006osrpoo 100023010 9005-23$2495 i/S Scale WACO SRE 83 1/2 roIOOlpOo65 23 OlD ROSS-ic$2495 9050-3512# 1/8 Scale 52 ooiosspoo 19 40 OlD 1/5 Scale LAKE RENEGADE'' AMPHIBIANt- 92 orog opoc 051095 OlD"- RCSS-902495 1/6 Scaleoso 0 russ MOTH DN-BOA 3l12'oOglpoO201040010 1/4 Scale PAGE RACER 94 1/2 ooiosspOo 30 OlD R00S-20 1/4 Scale WWI jCESSNA170 BRITISH SE-BA 1/3 010144 0609 spoc 1/4 Scale 001/4 0005 190019 0 24 OlD 5 49s ~oCURTIS GOSHAWK 01/0 roole 72 oolog 1q00FIIC2 131030010 ROQS-7 $2495 TROS DVA AERONCA c IbI 10/0 50 89 o405 1900 131023 OlD lW"",1 $2495 Onoloes 0 17 FOKKER DvliLA RD SUPER SOLUTION 50 biOs 1900 20 OlD 005i0e1 B O-P 060 90 cooloel 8 90005 5 -n oll Ieoglh NIEUPORT 28MONOCOUPE 90A . 01990 50 1/2 06001900 3 OlD 9005-15 51/3 1000 128 06091900 BRITISH SOPWITN CAMEL P1 9C304 $2995 40 54b05 1900 75 ro 23 OlD 0i0011/5 Scale 77 oI0g 1900 -4 5 001 9C051 1 5 iPIPER TRI PACER 01995 DE HAVILLAND DH-4 1 3100 e 110 1009 1000 127 06081900 31010 9005-22$29901 51000 70oiog 1p00905S301995 POKKERDR 1 FAIRCHILD24 72 060919005 I101000 721/2ooOgSpOO 9005-6024901.I~ojROSSO$1495 AL~.i 000O100Ob00O0001O0 10100 1010~00 FOKKER D-VIII"1 30000 40 1/2 bios 11000 /Vl~.j26 111 PLEASE ADD $400 shipping booIng label 84 06091900 781o23OIDeogloel 003495Send Plan Sets brochure 8105 90001902495GRUMMAN WIDGEON SPAD C-XIII0601/51001e8210051900.r W E TECHNICALSERVICES 791/4oo091900131031 OlD104019i006000r00..335 Hammond Dr. Apt 913 90058$2795SCOS-8 02995Atlanto GA 30328 190 Model Aviation ection Notice plan numbers full-size plans box Ascender LII Chugger incorrect July issue should have read 856 857 respectively
Edition: Model Aviation - 1998/08
Page Numbers: 6, 189, 190
Like AMA members am concerned about future hobby agree AMAs philosophy introducing model aviation young people through education have suggestion another program AMA might pursue spring middle schools high schools around country sponsor science fairs Winners go compete regional state national international levels Local businesses major corporations alike sponsor awards variety categories As Army recruiter judge number fairs have always found number projects use model aviation investigate aeronautical principles suggestion Promote model aviation recognizing outstanding achievements students use model aviation science fair projects Give award recognizes Best Use Model Aviation equivalent prize could AMA youth membership subscription Model Aviation perhaps opportunity learn fly local club see primarily local effort promoted AMA clubs volunteer judge local science fair present award AMA could assist promoting program local clubs aware existed AMA could also create certificate medal create prepaid membership club could buy advance also see AMA providing promoting sort award state national level am sure finding local AMA volunteers participate program would difficult AMA promotes decision significantly lower cost youth membership cost program could remain minimal potential gain exposure hobby would worth Glenn Dean Frederick Maryland Joe Wagners May column struggling explain two-stroke engine doesnt make twice power four-stroke mentions two dissenting letters states neither came model engine manufacturer renowned expert am renowned expert nor am manufacturer am certified National Institute Automotive Service Excellence Master Automobile Technician member Society Automotive Engineers have employed automobile manufacturer Technical Service Department twenty years disagreement began Mr Wagner telling readership twostroke displacement incorrectly calculated wrote letter explaining flaws Mr Wagners argument now tries defend position preposterous notion grinding exhaust port higher comparing power output dont know theory has taken turn idea demonstrates lack understanding regard timing events two-stroke engine Raising exhaust much will course destroy engine fuel charge would expelled out exhaust port instead remaining combustion chamber during compression However have seen engines respond favorably exhaust timing changes port raised up 025 inch does square Mr Wagners explanation Mr Wagner now goes tell us another reason four-stroke can make essentially same power two-stroke says some two-strokes gross energy output has expended compressing fuel mixture crankcase true usually referred pumping loss would like point out pumping losses also occur four-stroke engines additionally fourstrokes have higher internal friction mechanical losses because valve-train requirements real answer has escaped Mr Wagner led readers down path misinformation gas exchange output internal combustion engine governed density fuel mixture combustion chamber After firing episode spent gases must cleared cylinder before fresh charge introduced four-stroke engine complete stroke piston devoted clearing exhaust gases another stroke introduce fresh charge two-stroke Continued page /89 6 Model Aviation ram Suggestion Let ters tc Editor Engine Shop Two Views cost Letters Continued page 6 engine must accomplish power stroke exhaust gases stroke piston introduce fresh charge compress next stroke inefficient results diluted fuel charge lower density spent gases can scavenged Virtually two-stroke development has centered around gaining efficiency gas exchange process port timing has such profound effect two-strokes operation tuned pipe effective An internal combustion engine basically pump volumetric efficiency tells us well pumps fuel mixture spent gases out Higher volumetric efficiency raises Brake Mean Effective Pressure BMEP determines power output Four-strokes capable producing much higher BMEP two-stroke engines reasons cited smaller engine displacements four-strokes suffer higher mechanical losses already described April issue Mr Wagner described air/fuel ratios claims gas engine needs 12 cubic inches air cubic inch fuel true couldnt fit large enough gas tank truck get around block Air/fuel ratios usually described units mass gasoline engine has stoichiometric fuel mixture 147 1 147 pounds air pound gasoline will produce best power mixture 125 1 again 125 pounds air pound fuel Perhaps some renowned experts Mr Wagner refers such Clarence Lee Bill Wisniewski George Aldrich have yet read column doubt subscribe theories Michael] Kuper Darrington Washington would like take opportunity put writing support Joe Wagners column Engine Shop seems have amazing understanding model engines 30s 40s us continue use engines need help can get Doug King Fillmore California Fox 35 Throttle direct letter person wanted put throttle Fox 35 CL engine time Fox made carb fit 35 tried couldnt make work Later made bushing tried 05 40 size airbleed carb also I I 858 Back 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please include requests payment some other service plans order order phone call 765 287-1256 order fax complete send form fax number 765 289-4248 Domestic customers please include $300 shipping handling Add $300 have plans mailed tube Please No COD Orders Make check money order payable US funds drawn US bank ModelAviation AMA 5151 East Memorial Dr Muncie IN 47302 Please allow three weeks delivery ENCLOSED $ CARD NO NAME Check Money Order J MasterCardNisa EXP DATE AMA No _____________ STREET ____ CITY __________ STATEZIP Customers outside US add $300 additional shipping handling per plan L a1 August1998189 PRE-FLIGHT Since planning ad Pre Flight Inspection asked Ken Cemy what did check planes Ken south Florida Unlimited IMAC competitor remarkable record competes Masters Full Scale Inspector Commercial Air Liners Kens List Check Following Security Also Check Attaching Screws Spinner & Propeller Cowling Landing Gear & Wheel Pants Both wings Anti Rotation Pins Ailerons Aileron Servos & Linkage Stabilizers & Elevators Elevator Servos & Linkage Vertical Fin & Rudder Tailwheel Assembly Canopy Batteries Proper Voltage Make dam sure have Full Tank Gas Tail Wire Connections Plastic Clevices Trim & Balance Radio Check Ground last four added Ken does have tail wires Precision Aviation Extra 300S hope cut Out put flight box will have reminder hopefully catch lot problems before happen Thanks Ken sharing us Bob Godfreys Precision Aviation Design P0 Box 158 Palmetto FL 34220-01 58 Phone 941-729-2971 Fax 941-729-6761 Exclusive Distributors BME Engines e-mail bobflies@mindspringcom New Web Site Under Construction Home Airplanes Bob Godfrey Designer TOOWinners didnt work Fox three modes high speed midrange off throttled CL Fox would OK hand launch Combat-type airplanes Harold Krysak Waukesha Wisconsin Prejudice prejudice against model airplanes page 146 May issue Model Aviation read Triad Aeromodelers club lost flying site because person complained noise What happened democracy majority rule same situation Carmel Valley north San Diego Palomar RC Flyers lost field because person complained field mile nearest house next Interstate 5 traffic goes roaring 24 hours day helicopters jets fly overhead Now have drive 20 miles fly instead two area full dogs running loose leaving piles against law walk around valley day health weather permitting can hear dozen dogs barking making decibels model airplanes Will dogs outlawed person complains life used fly glider Torrey Pines cost went up $100 $150 year let membership expire can fly Morley Field 10 years same price fly gas Electric now its fun dont have wait wind Francis Smith San Diego California Scale Flight Routines regard article Stan Alexander [April 19981 time Scale event airplane has gear problems its automatic reduction points Ive noticed other publications show airplane gear operating anything pilot should given extra points can get airplane down piece have flying again next round judges think full-scale airplanes dont have mechanical problems After scale events full-scale airplanes have mechanical problems cant models judges think Navy airplane has never landed carrier gear problems Come judges looking scale realism mechanical problems real gets Steve Freitag Oklahoma City Oklahoma BILL EFFINGER SAYS PIann PalternTu Sets RIC Scale Models reol roooe ooOerr 1/4 Scale RYAN STA 9006osrpoo 100023010 9005-23$2495 i/S Scale WACO SRE 83 1/2 roIOOlpOo65 23 OlD ROSS-ic$2495 9050-3512# 1/8 Scale 52 ooiosspoo 19 40 OlD 1/5 Scale LAKE RENEGADE'' AMPHIBIANt- 92 orog opoc 051095 OlD"- RCSS-902495 1/6 Scaleoso 0 russ MOTH DN-BOA 3l12'oOglpoO201040010 1/4 Scale PAGE RACER 94 1/2 ooiosspOo 30 OlD R00S-20 1/4 Scale WWI jCESSNA170 BRITISH SE-BA 1/3 010144 0609 spoc 1/4 Scale 001/4 0005 190019 0 24 OlD 5 49s ~oCURTIS GOSHAWK 01/0 roole 72 oolog 1q00FIIC2 131030010 ROQS-7 $2495 TROS DVA AERONCA c IbI 10/0 50 89 o405 1900 131023 OlD lW"",1 $2495 Onoloes 0 17 FOKKER DvliLA RD SUPER SOLUTION 50 biOs 1900 20 OlD 005i0e1 B O-P 060 90 cooloel 8 90005 5 -n oll Ieoglh NIEUPORT 28MONOCOUPE 90A . 01990 50 1/2 06001900 3 OlD 9005-15 51/3 1000 128 06091900 BRITISH SOPWITN CAMEL P1 9C304 $2995 40 54b05 1900 75 ro 23 OlD 0i0011/5 Scale 77 oI0g 1900 -4 5 001 9C051 1 5 iPIPER TRI PACER 01995 DE HAVILLAND DH-4 1 3100 e 110 1009 1000 127 06081900 31010 9005-22$29901 51000 70oiog 1p00905S301995 POKKERDR 1 FAIRCHILD24 72 060919005 I101000 721/2ooOgSpOO 9005-6024901.I~ojROSSO$1495 AL~.i 000O100Ob00O0001O0 10100 1010~00 FOKKER D-VIII"1 30000 40 1/2 bios 11000 /Vl~.j26 111 PLEASE ADD $400 shipping booIng label 84 06091900 781o23OIDeogloel 003495Send Plan Sets brochure 8105 90001902495GRUMMAN WIDGEON SPAD C-XIII0601/51001e8210051900.r W E TECHNICALSERVICES 791/4oo091900131031 OlD104019i006000r00..335 Hammond Dr. Apt 913 90058$2795SCOS-8 02995Atlanto GA 30328 190 Model Aviation ection Notice plan numbers full-size plans box Ascender LII Chugger incorrect July issue should have read 856 857 respectively