REMEMBER topical table above new column feature began last months issue idea provide easy lookup scheme readers ow saw somewhere side above ta ble will forewarn whats ahead first open MA month Please give some time let know like idea Electric Connection service also intro duced last issue idea help Electric modelers meet youre loner small group club wants let folks general area know exist looking model ers similar persuasion just let know writ ing Ill list info Since service new will take several months initial offerings appear After will still take few months input ap pear As example what mean just re ceived December-dated issue favorite model magazine prepared write col umn February issue Trainers bring lot reader mail ten dominant model type local flying field well Given interest Id like share some thoughts about instructors trainers general about some Electric trainers par ticular Sometimes Heck its oil time going through model magazine its adver tising cant help get feeling RC trainers account 999999% total model hobby market seems just about everything advertised trainer no matter what configuration size shape etc Well bit exaggeration course sure lot so-called RC trainers types out suspect unwary ginner pilot tempted some flashy ad some pretty picture wound up deep re grets about supposed trainer selection lieve some manufacturers have no consciences Beginning pilots need two things good honest basic trainer 2 good instructor pilot category may reading column let suggest make certain first model really basic trainerbe Electric wet-poweredand have good instructor two combination can make big difference So what basic trainer what makes good instructor Opinions differ some book basic trainer relatively slow stable forgiving model properly set up would capable sustained safe flight landing its own no RC guidance effect could doc ile sport Free Flight RC added say would actually flown way could Probably best examples concept Old-Timers em Such model would typically have high-wing cabin appearance usually flat-bottomed undercambered airfoil perhaps section some Phillips entry slightly raised leading edge entry point no ailerons sufficient exces sive dihedral would constructed mostly balsa its reasonably light thus capable relatively slow flight first tried RC mid-Fifties just such plane Guillows Trixter Beam rudderonly escapement operated time no instructors radios didnt always work Id flown FF several years background plus radio actually worked sometimes allowed self-instruct Nowadays RC beginners have heard term Free Flight its virtually im possible safely self-train immediate grievous consequencesat least opinion Thus besides needing basic trainer begin ning pilot needs good instructor Astros new Model 111 AC/DC Constant Current Charger puts out steady current 45 amps charges up 12 Ni-Cd cells auto matically shuts down full charge via its peak-detection circuitry line four oblong cutouts top panel lets cooling air out Circular trio slots bottom panel air intake integral cooling fan seen mounted below transformer photo right 42 Model Aviation Radio Conoi Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 months topics 1 Electric Connection service 2 Trainers flight instructors 3 Thrust measurements 4 More Futaba Electric receiver Roland Hoop West Chester PA brought Berkeley Brigadier 89 KRC Electric Fly father started build kit 1939 never finisheduntil 50 years later Covering Coverite Micafilm closeup photo note cabin side windows cleverly fashioned effective air scoops original plans arming switch charging jack power system conve niently mounted lower corner windshield Author Bob Kopaki says Astro charging jack best availableand youre using dont know what youre missing Among other things good instructor mod eler relatively accomplished flying kind model described above may sound silly its Ive seen hotshot pilot can readily impress onlooker daz zling high-powered high-speed Aerobatics has virtually no ability maybe no interest flying wing good instructor will have real feel range modelsincluding basic trainers real feel needs beginning pilot good instructor safety conscious will stick closely will very very rarely allow mishapso plane will last much longer just wish could also tell name youll have check out yourself recent years have number socalled Electric trainers introduced market readers inquire about products Ive flown several such planes have own reaction flights always under radio control opinion planes would trimma ble reliable stable not-too-fast Free Flights As such would considered basic trainers personal rule book models Im referring listed no particular order have flown have helped student pilots Great Planes ElectriCUB PT Elec tric Astro Viking Goldberg Electra Mirage Leisure Amptique Playboy general recommend consideration course differences among help make selection some additional notes comments follow assume models equipped rudder elevator motor control speed con trol preferred power system pro vides adequate flight power thats ba sic trainerwet dryshould have three chan nels RME adequate power Ive seen beginners get trouble too-highpowered too-fast so-called trainer ailerons other single reason other good instructor allowing use such trainer model first place average planes preceding list capable slowest flight Vik ing Playboy Amptique planes give time think youre first learn ing flya critical time new pilots life plane seems like its moving very fast impression speed no matter slow model may really wears off after time believe basic trainer will time become totally boring good instruc tor would likely have lots trouble handling such slow plane Viking Playboy Old-Timers gan life Free Flights days old before RC Amptique OT slow flier primarily because equipped per plan lightest being typically about eight ounces less other listed has gen erous wing area moderately thick flatbottomed airfoil combines allow model fly rather slowly Amptique all-time favorite kits consider three planes best choices beginning pilots have modelbuilding backgrounds Please note subtle dis tinction can difference between beginning RC pilot beginning model builder reason comments OTs have lot sticks other tricky things like undercambered airfoils makes em relatively difficult build cover exactly wrong thing beginning builders Continued page 148 PROPELLER SAFETY MESSAGE safety precautions designed enhance enjoyment model flying should part modelers routine both flying site workshop 1 Select correct propeller size following engine manufacutrers recommendations 2 Before using plastic props remove flash along edges propeller scraping pocket knife Install propeller using correct nut washer airfoil side forward securely tighten Recheck after flight 4 Use chicken stick electric starter start engine make adjustments behind engine 5 Keep spectators least 20 feet away out path rotating propeller 6 Wear safety glasses hand protection operating model engines inrAvIA~Lc permit objects touch turning propeller Remain clear propeller arc 7 To stop engine cut off fuel supply accordancewith manufacturers instruc tions case DO NOT stop propeller hand other object 8 Inspect propeller after flight Discard propeller has nicks scratches other visible defect DONOTrepair alter orinanywaymodify propeller 9 We strongly suggest propeller tips painted order increase visibility turning rotating propeller can cause serious personal Injury FOLLOW THESE INSTRUCTIONS CAREFULLY WINDSOR PROPELLER CO Monier Cr ho Cordova CA 95742 3 February 1990 43 TALOG SAVINGS BALSAM *975$575 8575$925 AVAILABLE AT AMERICAS FINEST HOBBY SHOPS $975$525 DISTRIBUTED BY END WDIRZZD 7550 5n Gab,eI 504 codero CA 93422 455-1717 THIRTY-SIXTH ANNUAL RADIO CONTROL EXPOSITION APRIL 6 7 8 1990 FRIDAY9amto6pm SATURDAY9amto6pm SUNDAY9amto43Opm TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO TICKETS can purchased door ADVANCE sending self-addressed stamped business size 41/sx91/s envelope TICKETS 38235 Castle Romulus Ml 48174 orders above 10 tickets must include double postage US orders must include 25 cents per order handling charge foreign orders must include 50 cents per order handling charge need send addressed envelope will provide necessary postage NOTE Registered Express Type Mail Orders Will Acceptedll Include check money order US funds made payable Weak Signals R/C Club Ticket prices $400 per day foradultsandSlOOperdayforchildren 12 under Please specify number Deadline ticket orders March 30 1990 sales final non-refundable Hotel info map area may obtained sending stamped self-addressed envelope ticket address above Any other Exposition information avail able contacting Wayne Yeager co director ticket address phone 313 941-6661 Will Have TraditionalSwap Shop Saturday Night Auction COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE No Jets SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models No Engines HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED presented Weak Signals R/C Club Toledo Ohio ma maicnea -errormance ystem TOP PERFORMANCE K&B ENGINES MrrlaieMaine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER FOXY RESIN K&B SUPER FOXY THINNER K&B SUPER FOXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS Doug directly Douglas Aircraft PO Box 92472 Long Beach CA 90809 phone 1213/498-1737 Mad scientists like tinkering unique innovative designs have developed mad scientist reputation other fliers youre alone have faced kind treatment throughout modeling career have others such experimenter Navy Lt Tom Staggs received fantastic letter Tom detailing work has done fly ing wings Having mechanical engineer ing major college currently flying EA-6Bs Navy Tom has practical knowledge ability come up some very unique interesting ideas fellow mad scientist especially flying wings Tom would like trade ideas failures successes like Heres address Lt Tom Staggs VAQ 129 E/W NAS Whidbey Island Oak Harbor WA 98278-6100 RC Electrics/Kopski Continued page 43 Amptique much better respect kit lacks detailed construction/instruction manual choose go very fineflying models have little no previous build ing experience sure can get some experi enced help construction before start easiest build beginners seem Electra Mirage PT Electric Unlike first planes have extensive highly de tailed highly illustrated instruction booklets such good beginning builders aver age models have generally heavier wing loadings thus fly somewhat fasterbut still make pretty good basic trainers folks think fair say fly easily less easily first three ElectriCUB also falls category being semiscale has others ElectriCUB does fly beautifully trainerslow stable forgivingits too pretty purpose What mean CUB has scale details because somewhat complicated fragile reacts less better bumps often associated training recommend next plane models listed Electra differs its Glider also largest model listed Some folks like idea Sailplane would good choice plane best bunch carrying conventional radiosie standard-size servos turn printer airfoil plotter with.. FOILED AGAIN! llljj AIRFOtLS tN ANY CHORD UP TO 24 INCHES o MODIFY THtCKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS o ENTER DATA EASILY VIA INTELLIGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 as onkn plea ,rios aeaeaioeal bask 8n4fas US$50 npa,ad - pleas asepn& pasasn 1, S,d h,k o,,n .le CYGNET Software 24843 Del Prado #141b Dana Point CA 92629 opposed microservos 500-mAh receiver bat tery packs large receivers excels because its large wing area case always rec ommend using micro-sized radio systems planes excess weight saved about five eight ounces definitely shows up better flight performance lighter model slower can made flya worthy goal beginners Also lighter model longer flight time per charge something else very worthwhile some other trainer models mar ket such Midwest Aero-Lectric Guillow Aeronca Ive included because Ive no personal experience some other Electric kits definitely basic trainers include ElectraStreak Electric Hots Skyvolt Micro Racer Etude Race Rat Wasp name some Now back good instructor get quite few letters wherein guys local club wont help new guy Electric seem several reasons given unfamiliarity motors batteries some earlier bad im pression experience fear Electric con viction Electric dont fly kid perhaps macho trip power club run let offer thought two suggestions thought Chances group rejected didnt have good structor club roster anyway sugges tions See can find someone locally likes experienced Sailplanes OTs lack Electric experience chances theyll good job checking out plane getting air 2 Go back beginning column read about Elec tric Connection service Someday future common reaction local field will some thing like dont fly greasy noisy kid stuff fella' So have thoughts offerings instructors trainers general some Elec tric trainers particular Now some wont have write letters about thats help well Thrust measurements propeller pull seem interest Electric modelers get couple letters year readers se riously pursuit thrust study topic par ticular Ive received several lengthy detailed let ters numerous photographs thrust measure ment data collected homemade test setups readers over country have say some test setup fixtures down right impressive 148 Model Aviation h p NEW ELECTRIC Fly . t stand-way-off scale fun ship designed forO5 electric power can per-form take-offs touch goes aerobatics beauty yet enjoy docile slow flight easy landings Quick aid easy build kit includes pre cut fuselage sides tail feathers small parts hardware complete rolled plans step-by-step instructions formed landing gear windshield Electro-combo includes kit DSC 075 Hyperth rust motor fused switch iharness Tamiya connector propeller adaptor 8/4 fiberglass propeller 40 Span 275 Sq area 32 oz flying ht flat bottom airfoil rudder elevator motor add ailerons too rII%r$I795 IIAVEY675 TOWER LANE SPECIAL COMBOYSTEMSWEST CHESTE1 PA 19380 BASIC KIT $29IORPoRATIoN 215430 8045 Typically given homemade test setup will have some way affixing motor/prop combo mechanism ultimately displays thrust propeller pull ounces Some provision al ways made vary measure power input rpm swap motors propellers usual purpose pursuit seems to deter whats best combination motor bat tery prop friends lose cause motors batteries dont develop thrust per se So Im exactly sure mean ing whats best way see given prop given rpm displays given thrust thats spin ning propeller develops thrust whatever thats providing energy spin itbe electric motor steam engine twisted elastic bands motion ocean clockwork dylith ium crystal engines hand crank life form treadmill forgive gas enginedoes matter put different words prop some rpm displays some particular thrust level will display same thrust same rpm no matter what turns Now can certainly understand conve nience using ati electric motor aid evaluation comparison props thrust What have problem impression somehow particular motor/battery makes difference end thrust result What ever prop its rpm/thrust often several motor/battery combos will job turning Now seriously pursue thrust fashion Ive described somehow Ive missed point please let know Ill pass good info along future column everyones benefit might make up some such instrumentation myself Mean thanks have taken time share photos data etc Im sorry blew Im certainly willing try again OK Speed controls have topic covered last few columns now have brief followup coverage As promised last month since asked Futaba Electric re ceiver built-in speed control uses framerate speed control design personally borrowed measured know case Its interesting note receiver has become very popular locality also seems work well Unfortunately its limited sevencell motor battery packs relatively small mo tors feature dont particularly care automatic motor shutdowna built-in fea ture BEC battery eliminator circuit designcan catch surprise rea son prefer separate receiver battery Im hoping Futabas marketing set has significant success well see biggerand-better receiver/speed-control combos come along future sure makes installations sim pler folks Let close noting beginning whole new flying year will scene just about time youre reading Happy Quiet Landings everyone throughout 1990 RC Scale/Tschirgi Continued page 45 approach rotates apply aileron etc remarkably realistic three landing attempts NASA simula tor destroyed orbiter killed myself three times Experiences T-28 have similar Both machines have odd characteris tic After establishing slow glide path run way attempting flare flare term used describe pitch maneuver used slow descent aircraft nears ground landing approachthe pilot pulls back control column raises nose vehicleEd will rotate vehicle ac tion has little effect crafts velocity vector continues unabated ground char acteristic product wings having very low aspect ratio overall design high parasitic drag lots exterior surface area first glance T-28 would seem have reasonable aspect ratio biplane since span-to-chord ratio about 51 interplane gap vertical distance between two wingsEd exceeds chord However deter mining effective aspect ratio multiplane complex question case T-28 ex cessive gap between four wing roots fu selage tends reduce designs aerodynamics two separate biplane cells aspect ration about 21 Thus total config uration has effective aspect ratio little 20 keep T-28s approach speed high manage properly flare troubles far over planes high center-ofgravity narrow-track landing gear poor aerodynamic directional stability combine pro duce inevitable ground loop unless Im flying grass landing directly brisk breeze youve gotten impression Id recommend model card-carrying maso chists youre right T-28 model does corporate few interesting design features have proven number models nay general interest Continued page 1S3 February 1990 149 0
Edition: Model Aviation - 1990/02
Page Numbers: 42, 43, 148, 149
REMEMBER topical table above new column feature began last months issue idea provide easy lookup scheme readers ow saw somewhere side above ta ble will forewarn whats ahead first open MA month Please give some time let know like idea Electric Connection service also intro duced last issue idea help Electric modelers meet youre loner small group club wants let folks general area know exist looking model ers similar persuasion just let know writ ing Ill list info Since service new will take several months initial offerings appear After will still take few months input ap pear As example what mean just re ceived December-dated issue favorite model magazine prepared write col umn February issue Trainers bring lot reader mail ten dominant model type local flying field well Given interest Id like share some thoughts about instructors trainers general about some Electric trainers par ticular Sometimes Heck its oil time going through model magazine its adver tising cant help get feeling RC trainers account 999999% total model hobby market seems just about everything advertised trainer no matter what configuration size shape etc Well bit exaggeration course sure lot so-called RC trainers types out suspect unwary ginner pilot tempted some flashy ad some pretty picture wound up deep re grets about supposed trainer selection lieve some manufacturers have no consciences Beginning pilots need two things good honest basic trainer 2 good instructor pilot category may reading column let suggest make certain first model really basic trainerbe Electric wet-poweredand have good instructor two combination can make big difference So what basic trainer what makes good instructor Opinions differ some book basic trainer relatively slow stable forgiving model properly set up would capable sustained safe flight landing its own no RC guidance effect could doc ile sport Free Flight RC added say would actually flown way could Probably best examples concept Old-Timers em Such model would typically have high-wing cabin appearance usually flat-bottomed undercambered airfoil perhaps section some Phillips entry slightly raised leading edge entry point no ailerons sufficient exces sive dihedral would constructed mostly balsa its reasonably light thus capable relatively slow flight first tried RC mid-Fifties just such plane Guillows Trixter Beam rudderonly escapement operated time no instructors radios didnt always work Id flown FF several years background plus radio actually worked sometimes allowed self-instruct Nowadays RC beginners have heard term Free Flight its virtually im possible safely self-train immediate grievous consequencesat least opinion Thus besides needing basic trainer begin ning pilot needs good instructor Astros new Model 111 AC/DC Constant Current Charger puts out steady current 45 amps charges up 12 Ni-Cd cells auto matically shuts down full charge via its peak-detection circuitry line four oblong cutouts top panel lets cooling air out Circular trio slots bottom panel air intake integral cooling fan seen mounted below transformer photo right 42 Model Aviation Radio Conoi Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 months topics 1 Electric Connection service 2 Trainers flight instructors 3 Thrust measurements 4 More Futaba Electric receiver Roland Hoop West Chester PA brought Berkeley Brigadier 89 KRC Electric Fly father started build kit 1939 never finisheduntil 50 years later Covering Coverite Micafilm closeup photo note cabin side windows cleverly fashioned effective air scoops original plans arming switch charging jack power system conve niently mounted lower corner windshield Author Bob Kopaki says Astro charging jack best availableand youre using dont know what youre missing Among other things good instructor mod eler relatively accomplished flying kind model described above may sound silly its Ive seen hotshot pilot can readily impress onlooker daz zling high-powered high-speed Aerobatics has virtually no ability maybe no interest flying wing good instructor will have real feel range modelsincluding basic trainers real feel needs beginning pilot good instructor safety conscious will stick closely will very very rarely allow mishapso plane will last much longer just wish could also tell name youll have check out yourself recent years have number socalled Electric trainers introduced market readers inquire about products Ive flown several such planes have own reaction flights always under radio control opinion planes would trimma ble reliable stable not-too-fast Free Flights As such would considered basic trainers personal rule book models Im referring listed no particular order have flown have helped student pilots Great Planes ElectriCUB PT Elec tric Astro Viking Goldberg Electra Mirage Leisure Amptique Playboy general recommend consideration course differences among help make selection some additional notes comments follow assume models equipped rudder elevator motor control speed con trol preferred power system pro vides adequate flight power thats ba sic trainerwet dryshould have three chan nels RME adequate power Ive seen beginners get trouble too-highpowered too-fast so-called trainer ailerons other single reason other good instructor allowing use such trainer model first place average planes preceding list capable slowest flight Vik ing Playboy Amptique planes give time think youre first learn ing flya critical time new pilots life plane seems like its moving very fast impression speed no matter slow model may really wears off after time believe basic trainer will time become totally boring good instruc tor would likely have lots trouble handling such slow plane Viking Playboy Old-Timers gan life Free Flights days old before RC Amptique OT slow flier primarily because equipped per plan lightest being typically about eight ounces less other listed has gen erous wing area moderately thick flatbottomed airfoil combines allow model fly rather slowly Amptique all-time favorite kits consider three planes best choices beginning pilots have modelbuilding backgrounds Please note subtle dis tinction can difference between beginning RC pilot beginning model builder reason comments OTs have lot sticks other tricky things like undercambered airfoils makes em relatively difficult build cover exactly wrong thing beginning builders Continued page 148 PROPELLER SAFETY MESSAGE safety precautions designed enhance enjoyment model flying should part modelers routine both flying site workshop 1 Select correct propeller size following engine manufacutrers recommendations 2 Before using plastic props remove flash along edges propeller scraping pocket knife Install propeller using correct nut washer airfoil side forward securely tighten Recheck after flight 4 Use chicken stick electric starter start engine make adjustments behind engine 5 Keep spectators least 20 feet away out path rotating propeller 6 Wear safety glasses hand protection operating model engines inrAvIA~Lc permit objects touch turning propeller Remain clear propeller arc 7 To stop engine cut off fuel supply accordancewith manufacturers instruc tions case DO NOT stop propeller hand other object 8 Inspect propeller after flight Discard propeller has nicks scratches other visible defect DONOTrepair alter orinanywaymodify propeller 9 We strongly suggest propeller tips painted order increase visibility turning rotating propeller can cause serious personal Injury FOLLOW THESE INSTRUCTIONS CAREFULLY WINDSOR PROPELLER CO Monier Cr ho Cordova CA 95742 3 February 1990 43 TALOG SAVINGS BALSAM *975$575 8575$925 AVAILABLE AT AMERICAS FINEST HOBBY SHOPS $975$525 DISTRIBUTED BY END WDIRZZD 7550 5n Gab,eI 504 codero CA 93422 455-1717 THIRTY-SIXTH ANNUAL RADIO CONTROL EXPOSITION APRIL 6 7 8 1990 FRIDAY9amto6pm SATURDAY9amto6pm SUNDAY9amto43Opm TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO TICKETS can purchased door ADVANCE sending self-addressed stamped business size 41/sx91/s envelope TICKETS 38235 Castle Romulus Ml 48174 orders above 10 tickets must include double postage US orders must include 25 cents per order handling charge foreign orders must include 50 cents per order handling charge need send addressed envelope will provide necessary postage NOTE Registered Express Type Mail Orders Will Acceptedll Include check money order US funds made payable Weak Signals R/C Club Ticket prices $400 per day foradultsandSlOOperdayforchildren 12 under Please specify number Deadline ticket orders March 30 1990 sales final non-refundable Hotel info map area may obtained sending stamped self-addressed envelope ticket address above Any other Exposition information avail able contacting Wayne Yeager co director ticket address phone 313 941-6661 Will Have TraditionalSwap Shop Saturday Night Auction COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE No Jets SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models No Engines HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED presented Weak Signals R/C Club Toledo Ohio ma maicnea -errormance ystem TOP PERFORMANCE K&B ENGINES MrrlaieMaine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER FOXY RESIN K&B SUPER FOXY THINNER K&B SUPER FOXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS Doug directly Douglas Aircraft PO Box 92472 Long Beach CA 90809 phone 1213/498-1737 Mad scientists like tinkering unique innovative designs have developed mad scientist reputation other fliers youre alone have faced kind treatment throughout modeling career have others such experimenter Navy Lt Tom Staggs received fantastic letter Tom detailing work has done fly ing wings Having mechanical engineer ing major college currently flying EA-6Bs Navy Tom has practical knowledge ability come up some very unique interesting ideas fellow mad scientist especially flying wings Tom would like trade ideas failures successes like Heres address Lt Tom Staggs VAQ 129 E/W NAS Whidbey Island Oak Harbor WA 98278-6100 RC Electrics/Kopski Continued page 43 Amptique much better respect kit lacks detailed construction/instruction manual choose go very fineflying models have little no previous build ing experience sure can get some experi enced help construction before start easiest build beginners seem Electra Mirage PT Electric Unlike first planes have extensive highly de tailed highly illustrated instruction booklets such good beginning builders aver age models have generally heavier wing loadings thus fly somewhat fasterbut still make pretty good basic trainers folks think fair say fly easily less easily first three ElectriCUB also falls category being semiscale has others ElectriCUB does fly beautifully trainerslow stable forgivingits too pretty purpose What mean CUB has scale details because somewhat complicated fragile reacts less better bumps often associated training recommend next plane models listed Electra differs its Glider also largest model listed Some folks like idea Sailplane would good choice plane best bunch carrying conventional radiosie standard-size servos turn printer airfoil plotter with.. FOILED AGAIN! llljj AIRFOtLS tN ANY CHORD UP TO 24 INCHES o MODIFY THtCKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS o ENTER DATA EASILY VIA INTELLIGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 as onkn plea ,rios aeaeaioeal bask 8n4fas US$50 npa,ad - pleas asepn& pasasn 1, S,d h,k o,,n .le CYGNET Software 24843 Del Prado #141b Dana Point CA 92629 opposed microservos 500-mAh receiver bat tery packs large receivers excels because its large wing area case always rec ommend using micro-sized radio systems planes excess weight saved about five eight ounces definitely shows up better flight performance lighter model slower can made flya worthy goal beginners Also lighter model longer flight time per charge something else very worthwhile some other trainer models mar ket such Midwest Aero-Lectric Guillow Aeronca Ive included because Ive no personal experience some other Electric kits definitely basic trainers include ElectraStreak Electric Hots Skyvolt Micro Racer Etude Race Rat Wasp name some Now back good instructor get quite few letters wherein guys local club wont help new guy Electric seem several reasons given unfamiliarity motors batteries some earlier bad im pression experience fear Electric con viction Electric dont fly kid perhaps macho trip power club run let offer thought two suggestions thought Chances group rejected didnt have good structor club roster anyway sugges tions See can find someone locally likes experienced Sailplanes OTs lack Electric experience chances theyll good job checking out plane getting air 2 Go back beginning column read about Elec tric Connection service Someday future common reaction local field will some thing like dont fly greasy noisy kid stuff fella' So have thoughts offerings instructors trainers general some Elec tric trainers particular Now some wont have write letters about thats help well Thrust measurements propeller pull seem interest Electric modelers get couple letters year readers se riously pursuit thrust study topic par ticular Ive received several lengthy detailed let ters numerous photographs thrust measure ment data collected homemade test setups readers over country have say some test setup fixtures down right impressive 148 Model Aviation h p NEW ELECTRIC Fly . t stand-way-off scale fun ship designed forO5 electric power can per-form take-offs touch goes aerobatics beauty yet enjoy docile slow flight easy landings Quick aid easy build kit includes pre cut fuselage sides tail feathers small parts hardware complete rolled plans step-by-step instructions formed landing gear windshield Electro-combo includes kit DSC 075 Hyperth rust motor fused switch iharness Tamiya connector propeller adaptor 8/4 fiberglass propeller 40 Span 275 Sq area 32 oz flying ht flat bottom airfoil rudder elevator motor add ailerons too rII%r$I795 IIAVEY675 TOWER LANE SPECIAL COMBOYSTEMSWEST CHESTE1 PA 19380 BASIC KIT $29IORPoRATIoN 215430 8045 Typically given homemade test setup will have some way affixing motor/prop combo mechanism ultimately displays thrust propeller pull ounces Some provision al ways made vary measure power input rpm swap motors propellers usual purpose pursuit seems to deter whats best combination motor bat tery prop friends lose cause motors batteries dont develop thrust per se So Im exactly sure mean ing whats best way see given prop given rpm displays given thrust thats spin ning propeller develops thrust whatever thats providing energy spin itbe electric motor steam engine twisted elastic bands motion ocean clockwork dylith ium crystal engines hand crank life form treadmill forgive gas enginedoes matter put different words prop some rpm displays some particular thrust level will display same thrust same rpm no matter what turns Now can certainly understand conve nience using ati electric motor aid evaluation comparison props thrust What have problem impression somehow particular motor/battery makes difference end thrust result What ever prop its rpm/thrust often several motor/battery combos will job turning Now seriously pursue thrust fashion Ive described somehow Ive missed point please let know Ill pass good info along future column everyones benefit might make up some such instrumentation myself Mean thanks have taken time share photos data etc Im sorry blew Im certainly willing try again OK Speed controls have topic covered last few columns now have brief followup coverage As promised last month since asked Futaba Electric re ceiver built-in speed control uses framerate speed control design personally borrowed measured know case Its interesting note receiver has become very popular locality also seems work well Unfortunately its limited sevencell motor battery packs relatively small mo tors feature dont particularly care automatic motor shutdowna built-in fea ture BEC battery eliminator circuit designcan catch surprise rea son prefer separate receiver battery Im hoping Futabas marketing set has significant success well see biggerand-better receiver/speed-control combos come along future sure makes installations sim pler folks Let close noting beginning whole new flying year will scene just about time youre reading Happy Quiet Landings everyone throughout 1990 RC Scale/Tschirgi Continued page 45 approach rotates apply aileron etc remarkably realistic three landing attempts NASA simula tor destroyed orbiter killed myself three times Experiences T-28 have similar Both machines have odd characteris tic After establishing slow glide path run way attempting flare flare term used describe pitch maneuver used slow descent aircraft nears ground landing approachthe pilot pulls back control column raises nose vehicleEd will rotate vehicle ac tion has little effect crafts velocity vector continues unabated ground char acteristic product wings having very low aspect ratio overall design high parasitic drag lots exterior surface area first glance T-28 would seem have reasonable aspect ratio biplane since span-to-chord ratio about 51 interplane gap vertical distance between two wingsEd exceeds chord However deter mining effective aspect ratio multiplane complex question case T-28 ex cessive gap between four wing roots fu selage tends reduce designs aerodynamics two separate biplane cells aspect ration about 21 Thus total config uration has effective aspect ratio little 20 keep T-28s approach speed high manage properly flare troubles far over planes high center-ofgravity narrow-track landing gear poor aerodynamic directional stability combine pro duce inevitable ground loop unless Im flying grass landing directly brisk breeze youve gotten impression Id recommend model card-carrying maso chists youre right T-28 model does corporate few interesting design features have proven number models nay general interest Continued page 1S3 February 1990 149 0
Edition: Model Aviation - 1990/02
Page Numbers: 42, 43, 148, 149
REMEMBER topical table above new column feature began last months issue idea provide easy lookup scheme readers ow saw somewhere side above ta ble will forewarn whats ahead first open MA month Please give some time let know like idea Electric Connection service also intro duced last issue idea help Electric modelers meet youre loner small group club wants let folks general area know exist looking model ers similar persuasion just let know writ ing Ill list info Since service new will take several months initial offerings appear After will still take few months input ap pear As example what mean just re ceived December-dated issue favorite model magazine prepared write col umn February issue Trainers bring lot reader mail ten dominant model type local flying field well Given interest Id like share some thoughts about instructors trainers general about some Electric trainers par ticular Sometimes Heck its oil time going through model magazine its adver tising cant help get feeling RC trainers account 999999% total model hobby market seems just about everything advertised trainer no matter what configuration size shape etc Well bit exaggeration course sure lot so-called RC trainers types out suspect unwary ginner pilot tempted some flashy ad some pretty picture wound up deep re grets about supposed trainer selection lieve some manufacturers have no consciences Beginning pilots need two things good honest basic trainer 2 good instructor pilot category may reading column let suggest make certain first model really basic trainerbe Electric wet-poweredand have good instructor two combination can make big difference So what basic trainer what makes good instructor Opinions differ some book basic trainer relatively slow stable forgiving model properly set up would capable sustained safe flight landing its own no RC guidance effect could doc ile sport Free Flight RC added say would actually flown way could Probably best examples concept Old-Timers em Such model would typically have high-wing cabin appearance usually flat-bottomed undercambered airfoil perhaps section some Phillips entry slightly raised leading edge entry point no ailerons sufficient exces sive dihedral would constructed mostly balsa its reasonably light thus capable relatively slow flight first tried RC mid-Fifties just such plane Guillows Trixter Beam rudderonly escapement operated time no instructors radios didnt always work Id flown FF several years background plus radio actually worked sometimes allowed self-instruct Nowadays RC beginners have heard term Free Flight its virtually im possible safely self-train immediate grievous consequencesat least opinion Thus besides needing basic trainer begin ning pilot needs good instructor Astros new Model 111 AC/DC Constant Current Charger puts out steady current 45 amps charges up 12 Ni-Cd cells auto matically shuts down full charge via its peak-detection circuitry line four oblong cutouts top panel lets cooling air out Circular trio slots bottom panel air intake integral cooling fan seen mounted below transformer photo right 42 Model Aviation Radio Conoi Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 months topics 1 Electric Connection service 2 Trainers flight instructors 3 Thrust measurements 4 More Futaba Electric receiver Roland Hoop West Chester PA brought Berkeley Brigadier 89 KRC Electric Fly father started build kit 1939 never finisheduntil 50 years later Covering Coverite Micafilm closeup photo note cabin side windows cleverly fashioned effective air scoops original plans arming switch charging jack power system conve niently mounted lower corner windshield Author Bob Kopaki says Astro charging jack best availableand youre using dont know what youre missing Among other things good instructor mod eler relatively accomplished flying kind model described above may sound silly its Ive seen hotshot pilot can readily impress onlooker daz zling high-powered high-speed Aerobatics has virtually no ability maybe no interest flying wing good instructor will have real feel range modelsincluding basic trainers real feel needs beginning pilot good instructor safety conscious will stick closely will very very rarely allow mishapso plane will last much longer just wish could also tell name youll have check out yourself recent years have number socalled Electric trainers introduced market readers inquire about products Ive flown several such planes have own reaction flights always under radio control opinion planes would trimma ble reliable stable not-too-fast Free Flights As such would considered basic trainers personal rule book models Im referring listed no particular order have flown have helped student pilots Great Planes ElectriCUB PT Elec tric Astro Viking Goldberg Electra Mirage Leisure Amptique Playboy general recommend consideration course differences among help make selection some additional notes comments follow assume models equipped rudder elevator motor control speed con trol preferred power system pro vides adequate flight power thats ba sic trainerwet dryshould have three chan nels RME adequate power Ive seen beginners get trouble too-highpowered too-fast so-called trainer ailerons other single reason other good instructor allowing use such trainer model first place average planes preceding list capable slowest flight Vik ing Playboy Amptique planes give time think youre first learn ing flya critical time new pilots life plane seems like its moving very fast impression speed no matter slow model may really wears off after time believe basic trainer will time become totally boring good instruc tor would likely have lots trouble handling such slow plane Viking Playboy Old-Timers gan life Free Flights days old before RC Amptique OT slow flier primarily because equipped per plan lightest being typically about eight ounces less other listed has gen erous wing area moderately thick flatbottomed airfoil combines allow model fly rather slowly Amptique all-time favorite kits consider three planes best choices beginning pilots have modelbuilding backgrounds Please note subtle dis tinction can difference between beginning RC pilot beginning model builder reason comments OTs have lot sticks other tricky things like undercambered airfoils makes em relatively difficult build cover exactly wrong thing beginning builders Continued page 148 PROPELLER SAFETY MESSAGE safety precautions designed enhance enjoyment model flying should part modelers routine both flying site workshop 1 Select correct propeller size following engine manufacutrers recommendations 2 Before using plastic props remove flash along edges propeller scraping pocket knife Install propeller using correct nut washer airfoil side forward securely tighten Recheck after flight 4 Use chicken stick electric starter start engine make adjustments behind engine 5 Keep spectators least 20 feet away out path rotating propeller 6 Wear safety glasses hand protection operating model engines inrAvIA~Lc permit objects touch turning propeller Remain clear propeller arc 7 To stop engine cut off fuel supply accordancewith manufacturers instruc tions case DO NOT stop propeller hand other object 8 Inspect propeller after flight Discard propeller has nicks scratches other visible defect DONOTrepair alter orinanywaymodify propeller 9 We strongly suggest propeller tips painted order increase visibility turning rotating propeller can cause serious personal Injury FOLLOW THESE INSTRUCTIONS CAREFULLY WINDSOR PROPELLER CO Monier Cr ho Cordova CA 95742 3 February 1990 43 TALOG SAVINGS BALSAM *975$575 8575$925 AVAILABLE AT AMERICAS FINEST HOBBY SHOPS $975$525 DISTRIBUTED BY END WDIRZZD 7550 5n Gab,eI 504 codero CA 93422 455-1717 THIRTY-SIXTH ANNUAL RADIO CONTROL EXPOSITION APRIL 6 7 8 1990 FRIDAY9amto6pm SATURDAY9amto6pm SUNDAY9amto43Opm TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO TICKETS can purchased door ADVANCE sending self-addressed stamped business size 41/sx91/s envelope TICKETS 38235 Castle Romulus Ml 48174 orders above 10 tickets must include double postage US orders must include 25 cents per order handling charge foreign orders must include 50 cents per order handling charge need send addressed envelope will provide necessary postage NOTE Registered Express Type Mail Orders Will Acceptedll Include check money order US funds made payable Weak Signals R/C Club Ticket prices $400 per day foradultsandSlOOperdayforchildren 12 under Please specify number Deadline ticket orders March 30 1990 sales final non-refundable Hotel info map area may obtained sending stamped self-addressed envelope ticket address above Any other Exposition information avail able contacting Wayne Yeager co director ticket address phone 313 941-6661 Will Have TraditionalSwap Shop Saturday Night Auction COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE No Jets SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models No Engines HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED presented Weak Signals R/C Club Toledo Ohio ma maicnea -errormance ystem TOP PERFORMANCE K&B ENGINES MrrlaieMaine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER FOXY RESIN K&B SUPER FOXY THINNER K&B SUPER FOXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS Doug directly Douglas Aircraft PO Box 92472 Long Beach CA 90809 phone 1213/498-1737 Mad scientists like tinkering unique innovative designs have developed mad scientist reputation other fliers youre alone have faced kind treatment throughout modeling career have others such experimenter Navy Lt Tom Staggs received fantastic letter Tom detailing work has done fly ing wings Having mechanical engineer ing major college currently flying EA-6Bs Navy Tom has practical knowledge ability come up some very unique interesting ideas fellow mad scientist especially flying wings Tom would like trade ideas failures successes like Heres address Lt Tom Staggs VAQ 129 E/W NAS Whidbey Island Oak Harbor WA 98278-6100 RC Electrics/Kopski Continued page 43 Amptique much better respect kit lacks detailed construction/instruction manual choose go very fineflying models have little no previous build ing experience sure can get some experi enced help construction before start easiest build beginners seem Electra Mirage PT Electric Unlike first planes have extensive highly de tailed highly illustrated instruction booklets such good beginning builders aver age models have generally heavier wing loadings thus fly somewhat fasterbut still make pretty good basic trainers folks think fair say fly easily less easily first three ElectriCUB also falls category being semiscale has others ElectriCUB does fly beautifully trainerslow stable forgivingits too pretty purpose What mean CUB has scale details because somewhat complicated fragile reacts less better bumps often associated training recommend next plane models listed Electra differs its Glider also largest model listed Some folks like idea Sailplane would good choice plane best bunch carrying conventional radiosie standard-size servos turn printer airfoil plotter with.. FOILED AGAIN! llljj AIRFOtLS tN ANY CHORD UP TO 24 INCHES o MODIFY THtCKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS o ENTER DATA EASILY VIA INTELLIGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 as onkn plea ,rios aeaeaioeal bask 8n4fas US$50 npa,ad - pleas asepn& pasasn 1, S,d h,k o,,n .le CYGNET Software 24843 Del Prado #141b Dana Point CA 92629 opposed microservos 500-mAh receiver bat tery packs large receivers excels because its large wing area case always rec ommend using micro-sized radio systems planes excess weight saved about five eight ounces definitely shows up better flight performance lighter model slower can made flya worthy goal beginners Also lighter model longer flight time per charge something else very worthwhile some other trainer models mar ket such Midwest Aero-Lectric Guillow Aeronca Ive included because Ive no personal experience some other Electric kits definitely basic trainers include ElectraStreak Electric Hots Skyvolt Micro Racer Etude Race Rat Wasp name some Now back good instructor get quite few letters wherein guys local club wont help new guy Electric seem several reasons given unfamiliarity motors batteries some earlier bad im pression experience fear Electric con viction Electric dont fly kid perhaps macho trip power club run let offer thought two suggestions thought Chances group rejected didnt have good structor club roster anyway sugges tions See can find someone locally likes experienced Sailplanes OTs lack Electric experience chances theyll good job checking out plane getting air 2 Go back beginning column read about Elec tric Connection service Someday future common reaction local field will some thing like dont fly greasy noisy kid stuff fella' So have thoughts offerings instructors trainers general some Elec tric trainers particular Now some wont have write letters about thats help well Thrust measurements propeller pull seem interest Electric modelers get couple letters year readers se riously pursuit thrust study topic par ticular Ive received several lengthy detailed let ters numerous photographs thrust measure ment data collected homemade test setups readers over country have say some test setup fixtures down right impressive 148 Model Aviation h p NEW ELECTRIC Fly . t stand-way-off scale fun ship designed forO5 electric power can per-form take-offs touch goes aerobatics beauty yet enjoy docile slow flight easy landings Quick aid easy build kit includes pre cut fuselage sides tail feathers small parts hardware complete rolled plans step-by-step instructions formed landing gear windshield Electro-combo includes kit DSC 075 Hyperth rust motor fused switch iharness Tamiya connector propeller adaptor 8/4 fiberglass propeller 40 Span 275 Sq area 32 oz flying ht flat bottom airfoil rudder elevator motor add ailerons too rII%r$I795 IIAVEY675 TOWER LANE SPECIAL COMBOYSTEMSWEST CHESTE1 PA 19380 BASIC KIT $29IORPoRATIoN 215430 8045 Typically given homemade test setup will have some way affixing motor/prop combo mechanism ultimately displays thrust propeller pull ounces Some provision al ways made vary measure power input rpm swap motors propellers usual purpose pursuit seems to deter whats best combination motor bat tery prop friends lose cause motors batteries dont develop thrust per se So Im exactly sure mean ing whats best way see given prop given rpm displays given thrust thats spin ning propeller develops thrust whatever thats providing energy spin itbe electric motor steam engine twisted elastic bands motion ocean clockwork dylith ium crystal engines hand crank life form treadmill forgive gas enginedoes matter put different words prop some rpm displays some particular thrust level will display same thrust same rpm no matter what turns Now can certainly understand conve nience using ati electric motor aid evaluation comparison props thrust What have problem impression somehow particular motor/battery makes difference end thrust result What ever prop its rpm/thrust often several motor/battery combos will job turning Now seriously pursue thrust fashion Ive described somehow Ive missed point please let know Ill pass good info along future column everyones benefit might make up some such instrumentation myself Mean thanks have taken time share photos data etc Im sorry blew Im certainly willing try again OK Speed controls have topic covered last few columns now have brief followup coverage As promised last month since asked Futaba Electric re ceiver built-in speed control uses framerate speed control design personally borrowed measured know case Its interesting note receiver has become very popular locality also seems work well Unfortunately its limited sevencell motor battery packs relatively small mo tors feature dont particularly care automatic motor shutdowna built-in fea ture BEC battery eliminator circuit designcan catch surprise rea son prefer separate receiver battery Im hoping Futabas marketing set has significant success well see biggerand-better receiver/speed-control combos come along future sure makes installations sim pler folks Let close noting beginning whole new flying year will scene just about time youre reading Happy Quiet Landings everyone throughout 1990 RC Scale/Tschirgi Continued page 45 approach rotates apply aileron etc remarkably realistic three landing attempts NASA simula tor destroyed orbiter killed myself three times Experiences T-28 have similar Both machines have odd characteris tic After establishing slow glide path run way attempting flare flare term used describe pitch maneuver used slow descent aircraft nears ground landing approachthe pilot pulls back control column raises nose vehicleEd will rotate vehicle ac tion has little effect crafts velocity vector continues unabated ground char acteristic product wings having very low aspect ratio overall design high parasitic drag lots exterior surface area first glance T-28 would seem have reasonable aspect ratio biplane since span-to-chord ratio about 51 interplane gap vertical distance between two wingsEd exceeds chord However deter mining effective aspect ratio multiplane complex question case T-28 ex cessive gap between four wing roots fu selage tends reduce designs aerodynamics two separate biplane cells aspect ration about 21 Thus total config uration has effective aspect ratio little 20 keep T-28s approach speed high manage properly flare troubles far over planes high center-ofgravity narrow-track landing gear poor aerodynamic directional stability combine pro duce inevitable ground loop unless Im flying grass landing directly brisk breeze youve gotten impression Id recommend model card-carrying maso chists youre right T-28 model does corporate few interesting design features have proven number models nay general interest Continued page 1S3 February 1990 149 0
Edition: Model Aviation - 1990/02
Page Numbers: 42, 43, 148, 149
REMEMBER topical table above new column feature began last months issue idea provide easy lookup scheme readers ow saw somewhere side above ta ble will forewarn whats ahead first open MA month Please give some time let know like idea Electric Connection service also intro duced last issue idea help Electric modelers meet youre loner small group club wants let folks general area know exist looking model ers similar persuasion just let know writ ing Ill list info Since service new will take several months initial offerings appear After will still take few months input ap pear As example what mean just re ceived December-dated issue favorite model magazine prepared write col umn February issue Trainers bring lot reader mail ten dominant model type local flying field well Given interest Id like share some thoughts about instructors trainers general about some Electric trainers par ticular Sometimes Heck its oil time going through model magazine its adver tising cant help get feeling RC trainers account 999999% total model hobby market seems just about everything advertised trainer no matter what configuration size shape etc Well bit exaggeration course sure lot so-called RC trainers types out suspect unwary ginner pilot tempted some flashy ad some pretty picture wound up deep re grets about supposed trainer selection lieve some manufacturers have no consciences Beginning pilots need two things good honest basic trainer 2 good instructor pilot category may reading column let suggest make certain first model really basic trainerbe Electric wet-poweredand have good instructor two combination can make big difference So what basic trainer what makes good instructor Opinions differ some book basic trainer relatively slow stable forgiving model properly set up would capable sustained safe flight landing its own no RC guidance effect could doc ile sport Free Flight RC added say would actually flown way could Probably best examples concept Old-Timers em Such model would typically have high-wing cabin appearance usually flat-bottomed undercambered airfoil perhaps section some Phillips entry slightly raised leading edge entry point no ailerons sufficient exces sive dihedral would constructed mostly balsa its reasonably light thus capable relatively slow flight first tried RC mid-Fifties just such plane Guillows Trixter Beam rudderonly escapement operated time no instructors radios didnt always work Id flown FF several years background plus radio actually worked sometimes allowed self-instruct Nowadays RC beginners have heard term Free Flight its virtually im possible safely self-train immediate grievous consequencesat least opinion Thus besides needing basic trainer begin ning pilot needs good instructor Astros new Model 111 AC/DC Constant Current Charger puts out steady current 45 amps charges up 12 Ni-Cd cells auto matically shuts down full charge via its peak-detection circuitry line four oblong cutouts top panel lets cooling air out Circular trio slots bottom panel air intake integral cooling fan seen mounted below transformer photo right 42 Model Aviation Radio Conoi Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 months topics 1 Electric Connection service 2 Trainers flight instructors 3 Thrust measurements 4 More Futaba Electric receiver Roland Hoop West Chester PA brought Berkeley Brigadier 89 KRC Electric Fly father started build kit 1939 never finisheduntil 50 years later Covering Coverite Micafilm closeup photo note cabin side windows cleverly fashioned effective air scoops original plans arming switch charging jack power system conve niently mounted lower corner windshield Author Bob Kopaki says Astro charging jack best availableand youre using dont know what youre missing Among other things good instructor mod eler relatively accomplished flying kind model described above may sound silly its Ive seen hotshot pilot can readily impress onlooker daz zling high-powered high-speed Aerobatics has virtually no ability maybe no interest flying wing good instructor will have real feel range modelsincluding basic trainers real feel needs beginning pilot good instructor safety conscious will stick closely will very very rarely allow mishapso plane will last much longer just wish could also tell name youll have check out yourself recent years have number socalled Electric trainers introduced market readers inquire about products Ive flown several such planes have own reaction flights always under radio control opinion planes would trimma ble reliable stable not-too-fast Free Flights As such would considered basic trainers personal rule book models Im referring listed no particular order have flown have helped student pilots Great Planes ElectriCUB PT Elec tric Astro Viking Goldberg Electra Mirage Leisure Amptique Playboy general recommend consideration course differences among help make selection some additional notes comments follow assume models equipped rudder elevator motor control speed con trol preferred power system pro vides adequate flight power thats ba sic trainerwet dryshould have three chan nels RME adequate power Ive seen beginners get trouble too-highpowered too-fast so-called trainer ailerons other single reason other good instructor allowing use such trainer model first place average planes preceding list capable slowest flight Vik ing Playboy Amptique planes give time think youre first learn ing flya critical time new pilots life plane seems like its moving very fast impression speed no matter slow model may really wears off after time believe basic trainer will time become totally boring good instruc tor would likely have lots trouble handling such slow plane Viking Playboy Old-Timers gan life Free Flights days old before RC Amptique OT slow flier primarily because equipped per plan lightest being typically about eight ounces less other listed has gen erous wing area moderately thick flatbottomed airfoil combines allow model fly rather slowly Amptique all-time favorite kits consider three planes best choices beginning pilots have modelbuilding backgrounds Please note subtle dis tinction can difference between beginning RC pilot beginning model builder reason comments OTs have lot sticks other tricky things like undercambered airfoils makes em relatively difficult build cover exactly wrong thing beginning builders Continued page 148 PROPELLER SAFETY MESSAGE safety precautions designed enhance enjoyment model flying should part modelers routine both flying site workshop 1 Select correct propeller size following engine manufacutrers recommendations 2 Before using plastic props remove flash along edges propeller scraping pocket knife Install propeller using correct nut washer airfoil side forward securely tighten Recheck after flight 4 Use chicken stick electric starter start engine make adjustments behind engine 5 Keep spectators least 20 feet away out path rotating propeller 6 Wear safety glasses hand protection operating model engines inrAvIA~Lc permit objects touch turning propeller Remain clear propeller arc 7 To stop engine cut off fuel supply accordancewith manufacturers instruc tions case DO NOT stop propeller hand other object 8 Inspect propeller after flight Discard propeller has nicks scratches other visible defect DONOTrepair alter orinanywaymodify propeller 9 We strongly suggest propeller tips painted order increase visibility turning rotating propeller can cause serious personal Injury FOLLOW THESE INSTRUCTIONS CAREFULLY WINDSOR PROPELLER CO Monier Cr ho Cordova CA 95742 3 February 1990 43 TALOG SAVINGS BALSAM *975$575 8575$925 AVAILABLE AT AMERICAS FINEST HOBBY SHOPS $975$525 DISTRIBUTED BY END WDIRZZD 7550 5n Gab,eI 504 codero CA 93422 455-1717 THIRTY-SIXTH ANNUAL RADIO CONTROL EXPOSITION APRIL 6 7 8 1990 FRIDAY9amto6pm SATURDAY9amto6pm SUNDAY9amto43Opm TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO TICKETS can purchased door ADVANCE sending self-addressed stamped business size 41/sx91/s envelope TICKETS 38235 Castle Romulus Ml 48174 orders above 10 tickets must include double postage US orders must include 25 cents per order handling charge foreign orders must include 50 cents per order handling charge need send addressed envelope will provide necessary postage NOTE Registered Express Type Mail Orders Will Acceptedll Include check money order US funds made payable Weak Signals R/C Club Ticket prices $400 per day foradultsandSlOOperdayforchildren 12 under Please specify number Deadline ticket orders March 30 1990 sales final non-refundable Hotel info map area may obtained sending stamped self-addressed envelope ticket address above Any other Exposition information avail able contacting Wayne Yeager co director ticket address phone 313 941-6661 Will Have TraditionalSwap Shop Saturday Night Auction COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE No Jets SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models No Engines HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED presented Weak Signals R/C Club Toledo Ohio ma maicnea -errormance ystem TOP PERFORMANCE K&B ENGINES MrrlaieMaine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER FOXY RESIN K&B SUPER FOXY THINNER K&B SUPER FOXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS Doug directly Douglas Aircraft PO Box 92472 Long Beach CA 90809 phone 1213/498-1737 Mad scientists like tinkering unique innovative designs have developed mad scientist reputation other fliers youre alone have faced kind treatment throughout modeling career have others such experimenter Navy Lt Tom Staggs received fantastic letter Tom detailing work has done fly ing wings Having mechanical engineer ing major college currently flying EA-6Bs Navy Tom has practical knowledge ability come up some very unique interesting ideas fellow mad scientist especially flying wings Tom would like trade ideas failures successes like Heres address Lt Tom Staggs VAQ 129 E/W NAS Whidbey Island Oak Harbor WA 98278-6100 RC Electrics/Kopski Continued page 43 Amptique much better respect kit lacks detailed construction/instruction manual choose go very fineflying models have little no previous build ing experience sure can get some experi enced help construction before start easiest build beginners seem Electra Mirage PT Electric Unlike first planes have extensive highly de tailed highly illustrated instruction booklets such good beginning builders aver age models have generally heavier wing loadings thus fly somewhat fasterbut still make pretty good basic trainers folks think fair say fly easily less easily first three ElectriCUB also falls category being semiscale has others ElectriCUB does fly beautifully trainerslow stable forgivingits too pretty purpose What mean CUB has scale details because somewhat complicated fragile reacts less better bumps often associated training recommend next plane models listed Electra differs its Glider also largest model listed Some folks like idea Sailplane would good choice plane best bunch carrying conventional radiosie standard-size servos turn printer airfoil plotter with.. FOILED AGAIN! llljj AIRFOtLS tN ANY CHORD UP TO 24 INCHES o MODIFY THtCKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS o ENTER DATA EASILY VIA INTELLIGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 as onkn plea ,rios aeaeaioeal bask 8n4fas US$50 npa,ad - pleas asepn& pasasn 1, S,d h,k o,,n .le CYGNET Software 24843 Del Prado #141b Dana Point CA 92629 opposed microservos 500-mAh receiver bat tery packs large receivers excels because its large wing area case always rec ommend using micro-sized radio systems planes excess weight saved about five eight ounces definitely shows up better flight performance lighter model slower can made flya worthy goal beginners Also lighter model longer flight time per charge something else very worthwhile some other trainer models mar ket such Midwest Aero-Lectric Guillow Aeronca Ive included because Ive no personal experience some other Electric kits definitely basic trainers include ElectraStreak Electric Hots Skyvolt Micro Racer Etude Race Rat Wasp name some Now back good instructor get quite few letters wherein guys local club wont help new guy Electric seem several reasons given unfamiliarity motors batteries some earlier bad im pression experience fear Electric con viction Electric dont fly kid perhaps macho trip power club run let offer thought two suggestions thought Chances group rejected didnt have good structor club roster anyway sugges tions See can find someone locally likes experienced Sailplanes OTs lack Electric experience chances theyll good job checking out plane getting air 2 Go back beginning column read about Elec tric Connection service Someday future common reaction local field will some thing like dont fly greasy noisy kid stuff fella' So have thoughts offerings instructors trainers general some Elec tric trainers particular Now some wont have write letters about thats help well Thrust measurements propeller pull seem interest Electric modelers get couple letters year readers se riously pursuit thrust study topic par ticular Ive received several lengthy detailed let ters numerous photographs thrust measure ment data collected homemade test setups readers over country have say some test setup fixtures down right impressive 148 Model Aviation h p NEW ELECTRIC Fly . t stand-way-off scale fun ship designed forO5 electric power can per-form take-offs touch goes aerobatics beauty yet enjoy docile slow flight easy landings Quick aid easy build kit includes pre cut fuselage sides tail feathers small parts hardware complete rolled plans step-by-step instructions formed landing gear windshield Electro-combo includes kit DSC 075 Hyperth rust motor fused switch iharness Tamiya connector propeller adaptor 8/4 fiberglass propeller 40 Span 275 Sq area 32 oz flying ht flat bottom airfoil rudder elevator motor add ailerons too rII%r$I795 IIAVEY675 TOWER LANE SPECIAL COMBOYSTEMSWEST CHESTE1 PA 19380 BASIC KIT $29IORPoRATIoN 215430 8045 Typically given homemade test setup will have some way affixing motor/prop combo mechanism ultimately displays thrust propeller pull ounces Some provision al ways made vary measure power input rpm swap motors propellers usual purpose pursuit seems to deter whats best combination motor bat tery prop friends lose cause motors batteries dont develop thrust per se So Im exactly sure mean ing whats best way see given prop given rpm displays given thrust thats spin ning propeller develops thrust whatever thats providing energy spin itbe electric motor steam engine twisted elastic bands motion ocean clockwork dylith ium crystal engines hand crank life form treadmill forgive gas enginedoes matter put different words prop some rpm displays some particular thrust level will display same thrust same rpm no matter what turns Now can certainly understand conve nience using ati electric motor aid evaluation comparison props thrust What have problem impression somehow particular motor/battery makes difference end thrust result What ever prop its rpm/thrust often several motor/battery combos will job turning Now seriously pursue thrust fashion Ive described somehow Ive missed point please let know Ill pass good info along future column everyones benefit might make up some such instrumentation myself Mean thanks have taken time share photos data etc Im sorry blew Im certainly willing try again OK Speed controls have topic covered last few columns now have brief followup coverage As promised last month since asked Futaba Electric re ceiver built-in speed control uses framerate speed control design personally borrowed measured know case Its interesting note receiver has become very popular locality also seems work well Unfortunately its limited sevencell motor battery packs relatively small mo tors feature dont particularly care automatic motor shutdowna built-in fea ture BEC battery eliminator circuit designcan catch surprise rea son prefer separate receiver battery Im hoping Futabas marketing set has significant success well see biggerand-better receiver/speed-control combos come along future sure makes installations sim pler folks Let close noting beginning whole new flying year will scene just about time youre reading Happy Quiet Landings everyone throughout 1990 RC Scale/Tschirgi Continued page 45 approach rotates apply aileron etc remarkably realistic three landing attempts NASA simula tor destroyed orbiter killed myself three times Experiences T-28 have similar Both machines have odd characteris tic After establishing slow glide path run way attempting flare flare term used describe pitch maneuver used slow descent aircraft nears ground landing approachthe pilot pulls back control column raises nose vehicleEd will rotate vehicle ac tion has little effect crafts velocity vector continues unabated ground char acteristic product wings having very low aspect ratio overall design high parasitic drag lots exterior surface area first glance T-28 would seem have reasonable aspect ratio biplane since span-to-chord ratio about 51 interplane gap vertical distance between two wingsEd exceeds chord However deter mining effective aspect ratio multiplane complex question case T-28 ex cessive gap between four wing roots fu selage tends reduce designs aerodynamics two separate biplane cells aspect ration about 21 Thus total config uration has effective aspect ratio little 20 keep T-28s approach speed high manage properly flare troubles far over planes high center-ofgravity narrow-track landing gear poor aerodynamic directional stability combine pro duce inevitable ground loop unless Im flying grass landing directly brisk breeze youve gotten impression Id recommend model card-carrying maso chists youre right T-28 model does corporate few interesting design features have proven number models nay general interest Continued page 1S3 February 1990 149 0