There few very important things should right before attempting high-start winch launch new RC Sail plane author discusses new activity reminder old hands Pancho N Morris New ~iIpIane THIS ARTICLE intended help newcomer trim out first RC Sailplane can also refresher us things dont remember have stolen borrowed material too good writers remem ber should acknowledged will assume ship built covered surfaces should square fuselage rudder should exactly vertical respect stabilizer stab right angles fuselage top front wing stab should aligned perfectly fix Yes airplane will fly somewhat off wont fly well efficiently Besides everyone field will snicker behind back 54Model Aviation author Pancho Morris looks confident begins aunch Saiipiane because has attended preiiminaries recommended herein Photograph Allan Beutier // RUN STRAIGHT INTO THE WIND WITH THE PLANE LEVEL Next importantly wing must have warps best way check look wing trailing edge Looking very center wing look bottom wing slowly rotate leading edge upward glancing side side leading edge should disappear same time both wings large poly hedral wing easiest distance behind sailplane requiring helper plug-on wings plane check both wings have same incidence angle relationship fuselage warps get out old iron heat gun twist warps out reshrink covering Check recheck until get wing perfect little warp makes big turn again nothings worse hearing guys snicker Now have perfectly flat might want warp Im talking about washout mysterious term always hear having trailing edge wing tip slightly higher leading edge Without getting too technical im possible makes wing tips stall stop flying before center wing stalls slow down ship too much makes plane drop straight forward tip stalls first plane does something bad real fast Alright have plane square straight washed-out Now lets balance place indicated plans good spot Add lead nose until balances have never seen Sailplane come out nose-heavy weight always added nose can balance slightly ahead cen \ ter gravity CG point shown plans no means get behind first flight coming AlP dont have CG spot marked plans want know mark came usually about 33% mean aerodynamic chord MAC RC Sailplanes especially beginner types Mean aerodynamic chord theres good term What Mean stands average ornery Chord width wing Aerodynamic means part doing lifting mean aero dynamic chord purposes average average chord root chord average chord wing area divided wing span Both measurements should plans kit box top measure span consult childs math geometry book figure out area rectangles triangles make up wing root chord width wing fuselage So MAC root chord chord 2 MAC will figure 5 12 THROW STRAIGHT OUT NOT UP depending wing Now put MAC plane plane has straight trailing edge leading edge tapers back will trailing edge root forward Oppositely leading edge straight trailing edge tapers forward will leading edge root back both taper evenly will cen tered root chord taper unevenly will off either fore aft Guestimate Calculate 33% MAC mark front MAC will balance first flights Check make sure controls move proper direction Left rudder stick makes rudder go left side plane Back elevator stick makes trail ing edge elevator stab go up Spoilers have going ignored now Rudder throw should about 25 30 degrees side Elevator stab move ment should very little Make adjust ments servo arms control horns get amount Moving out servo arm gives throw Moving out control horn gives less throw Adjust devises rudder centered elevator level transmitter trims center positions Lets go field will first hand launch Sailplane before will just run Turn trans mitter receiver holding plane just over head dead level run wind plane wants pull up Dive Test GOOD FOR TRAINERS GOOD FOR HIGH PERFORMANCE February 198555 dive make trim adjustment transmitter same wants turn severe cant trimmed out transmitter trims make clevis adjustments until feels like just wants lift straight out hand essential run directly wind point nose horizon Now run give good push straight horizon spot well out front throw plane up ward should glide straight level nose comes up wants stall put some down trim dives put some up turns put rudder trim glides straight level ready high-start launch First make sure tow hook secure mounted plans said should slightly ahead balance point first flights never behind Another test like make new plane rest ground pick up wing tip other resting ground Now gently bounce plane should no pops creaks uneven bending along wing wing breaks consider yourself lucky surely would have broken tow much disastrous results Now get high-start Pull back about maximum stretch using have light Two-Meter plane might pull back way have large heavy plane stretch way dont want launch too little pull Turn transmitter receiver Hook up plane wiggle sticks hear see surfaces move Just before launch wiggle sticks again make sure recheck radio times Ask of us have launched receiver off Throw plane Out slightly up should start climb very steeply heading out too flat very gently add lit tle back stick up trim going up too steeply havent popped off stalled yet feed little down might have use little rudder keep straight also very gently launch speeds controls very lively will climb up level off quite ways front may need dip nose pull up sharply get line come off breeze flying Keep nose wind big wide S-turns wind Adjust rudder trim plane flies straight elevator trim flat fairly slow glide later Land out front youway out front Sure looks neat guys come behind bring right feet its lot better walk long way pick up piece walk short way pick up lots pieces get real comfortable rights lefts can land closer transmitter trims set way straight-and-level flight look elevator rudder Through clevis adjustments set positions transmitter trims neutral positions Fly again see flies well trims set neutral adjust some Once flying well trims set neutral look rudder elevator again have lot rudder trimmed check warp wing uneven washout crooked fin banana fuselage theres snickering again tilted stab Fix problems possible have lot up down eleva tor need shim wing stab TO SAILPLANE TOW HOOK 10- TO 12-IN-OIA PARACHUTE assuming fixed stab moving eleva tor An all-flying stab no problem just reset fixed stab such Gentle Lady Windrifter Wanderer Olympic etc easier shim wing have lot up elevator raise leading edge wing have down elevator shim up trailing edge wing Shim small amounts /6 time Use temporary shims now until get Sailplane flying nice slow speed trim neutral elevator flat stab Afterward can make perma nent shim Now have flying fairly slow speed trims neutral surfaces level lets check balance point good amount altitude put plane steep dive about 30 degrees Hold dive until has picked up good speed let go stick What did Did pull up tuck under just stay dive flat-bottom airfoil beginner-type floater should pull out slowly does balance point CG just want means will want recover dive itself yet will start porpoise whenever picks up speed turn wind gust pulls up sharply have too much weight nose have fly lot up elevator keep nose up condition plane will always wanting stall porpoise tucks under need lead nose have fly lot down keep nose down plane will want get ever-steepening dive picks up speed very dan gerous situation will also extremely touchy unmanageable elevator ship semi-symmetrical airfoil other high performance sec tions found Sagitta Metrick Golden Eagle Pantera etc will work best CG set plane does pull up tuck under just continues straight dive allows Continued page 144 300- TO 400-Fr OF 60-LB-TEST MONOFILAMENT OR NYLON LINE 12-IN METAL SPIKE ___________________/ 100 Fr OF 1/4 OR 3/16-IN-OIA SURGICAL RUBBER TUBING / STRETCH UNTIL IT PULLS APPROX 12 LB Diagram shows basics high-start system easiest ieast expensive method iaunching RC Saliplane flat iand Sometimes caiied catapuit iaunching author prefers call kite iaunching because vioient terms catapult wouid suggest Sailplane puiied air much like kite high-start consists stake spike surgicai tubing string monofiiament nyion parachute tow ring may bought compiete units several manufacturers ocal hobby shop included will reel winding up storing high-start line could build own high-start cost will probably higher purchased unit unless have economical source surgical tubing use high-start stretched 31/2 times length tubing using 100 ft surgical tubing means stretching 350 ft pull should about 8 lb lightweight Two-Meter ship up 14 lb Standard Unlimited-class Sailpianes Illustrations Chuck Fisher 56Model Aviation PILOTS TS RIOR TS T THE MOST SUPERIOR PILOT FIGURE ON THE MARKET LIGHTEST WEIGHT MOST REALISTIC AVAILABLE GIVE YOUR PLANE PILOT YOUR NEWEST OLDEST OR NEXT CREATION R YOURS TODAY FULL FIGURES CIVILIANWWII MILITARY 1/3 Scale $19951/5 Navy $1395 1/4 Scale14951/6AAF1195 1/5 Scale1295 L 1/12 Scale895 1/12 Chopper 895 Plus $250 shipping figure KNIGHTS OF THE AIR 7148 Lasting Light Way Columbia MD 21045 301-730-5596 FOAM WING CORES RC Giant Scale/Beckman CLJTOM FOAM CUTTING Continued page 141 Bangers article October 1981 issue MA As mentioned earlier objectives keep cost proj ect downway down As did prelim inary mental preparations keeping eye out anything cheap would useful first thing came across some foam core board friend graphics artist several sheets light firm M6-in-thick material never seen before stuff lying around unused wanted get rid latched onto Now know consider foam core cheap Until recently never paid anything four bucks sheet its still cheap first got stuff really didnt know what go ing itit just looked too good pass up time taking place wasnt much information about Giant Scale available fact term Giant Scale wasnt use just matter making model bit larger general use Actu ally models size werent new since routinely built 7A-ft-span radio-control models back early Fif ties thing new chainsaw-type engine its higher power desirable its higher vibration level undesirable knew right start needed spruce basic struc tural strength fitted financial plans project since balsa would too expensive strong enough things people have ask ing about comment pro cured learned cut spruce did indeed plan tell details what did future column things churning around head trying decide subject first monster effort additional cumshaw item served help selection some time aware fact thin tempered-aluminum sheets used offset printing often available free very little cost windfall similar lighter-gauge material photographer friend tipped scales wanted build Golden Age biplane much alumi num surface possible hadnt found free fabric yet wanted biplane cabane struts pain Spar rowhawk won hands down Sparrowhawk presented challenging problems out lined mentally advance con verted hardware proper time project proceeded first landing gear described May 1980 issue MA intend describe rest fasci nating tale unfolds future columns Well its fascinating Personal note want thank modeling friends across country have phone mall person ex pressed concern column has missing issue combina tion health problems business pres sures has made difficult devote necessary time write month during past year Im happy say health problems seem under control business pressures increasing thats indica tion may soon able afford tube glue need finish Sparrowhawk issue marks end fifth year have doing column hope continue some years come efforts may somewhat spotty See April Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 Setting Up/Morris Continued page 56 experienced flier build up great speed search lift make speed runs having fight hold plane down will stay puts Add remove lead nose retrim before fairly slow flight level elevator Now can play 144Model Aviation Uustom Uut u-iau 1Ut I-use 1W information contact$14995 OCEAN SlATE AEROMODEL ENGINEERING 21 Jaycee Dr West Wermck RI 02893 401 3288813Dealer 8 Kit Manufacturers Inquiries Invited Foam Its Beat Deal Beat Custom Built Models .jieLJD 2036 N Thorn Ave a mFresno CA 93704 6 pmOrder Phone 1209 233-1050lask Bill LOVE fly HATE build Contact ve solution problem Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc. - IF1yWhatIDui1d elevator throw Unless plan aerobatics need very little stage youre probably just trying fly two trim settings need know about minimum sink maxi mum glide angle Minimum sink will very slow flying speed just below stall gilder coming down slowest trim will use lift Maximum glide angle plane covering ground amount altitude lost will fair ly fast flying speed isthe trim used looking lift getting out areas sink gliders can see pick up speed feed down trim suddenly flatten out really move called getting step' want adjust elevator throw full up trim plane just starting stall mush out Minimum sink will just below Max imum glide angle should just below neutral trim setting harder find just have fly fly will flying somewhere between two settings fun part trim settings will change dayto-day depending wind temperature humidity etc talked about mean aerodynamic chord earlier wing loading also good figure know can impress buddies rattling off Wing loading weight plane ounces divided wing area square feet Wing area square feet area square inches divided 144 wing loading will figure oz/ft2 flat-bottom-airfoiled floater like Olym pic Windrifter Wanderer Gentle Lady etc will have wing loading somewhere between 6 8 oz/ft2 higher-per formance plane like Sagitta Metrick Golden Eagle Pantera etc will be tween 8 10 oz/ft2 very high-per formance ship like Bounty Hunter Camaro Fiesta Antares etc will be tween 10 14 oz/ft2 can increased addition lead ballast CG will make plane fly faster very useful windy days other adjustment can make improve performance tow hook position farther back set steeper plane will climb tow moved too far back plane will get very wild tow Move back far dare very small increments Also adding up trim back stick launch will steepen climb Again too much plane will get very violent stall towa very scary situation Add much dare covers basics setting up Sailplane fly well Flying well something different best advice practice practice practice can practice experienced flier can ing beep indicating time up F3B finalists California using clever system time over six minutes could least recorded six-minute Duration task would set one-six-zero-zero thereby starting off 1600 Ignoring first digit 1 still accurate time-remaining read out Flights over six minutes usually few seconds past mark readout say 0954 meant buddy six seconds over time could checked against official scorer watch called Micronta can clipped belt stood upright display desk table can attached small plate ferrous metal attached transmitter means small magnet its back Nice gadget Its history now Soaring Union Los Angeles SULA did magnificent job running F3B team selection finals last Labor Day weekend plus ex tra day lot club folks pitched few showed talents werent just RC field club has everything might want take few notes Ed Depues contributiona transmitter impound rack Photos tell story advantages February 1985145 coach spotting working lift Regardless practice RC Soaring/Pruss Continued page 43
Edition: Model Aviation - 1985/02
Page Numbers: 54, 55, 56, 144, 145
There few very important things should right before attempting high-start winch launch new RC Sail plane author discusses new activity reminder old hands Pancho N Morris New ~iIpIane THIS ARTICLE intended help newcomer trim out first RC Sailplane can also refresher us things dont remember have stolen borrowed material too good writers remem ber should acknowledged will assume ship built covered surfaces should square fuselage rudder should exactly vertical respect stabilizer stab right angles fuselage top front wing stab should aligned perfectly fix Yes airplane will fly somewhat off wont fly well efficiently Besides everyone field will snicker behind back 54Model Aviation author Pancho Morris looks confident begins aunch Saiipiane because has attended preiiminaries recommended herein Photograph Allan Beutier // RUN STRAIGHT INTO THE WIND WITH THE PLANE LEVEL Next importantly wing must have warps best way check look wing trailing edge Looking very center wing look bottom wing slowly rotate leading edge upward glancing side side leading edge should disappear same time both wings large poly hedral wing easiest distance behind sailplane requiring helper plug-on wings plane check both wings have same incidence angle relationship fuselage warps get out old iron heat gun twist warps out reshrink covering Check recheck until get wing perfect little warp makes big turn again nothings worse hearing guys snicker Now have perfectly flat might want warp Im talking about washout mysterious term always hear having trailing edge wing tip slightly higher leading edge Without getting too technical im possible makes wing tips stall stop flying before center wing stalls slow down ship too much makes plane drop straight forward tip stalls first plane does something bad real fast Alright have plane square straight washed-out Now lets balance place indicated plans good spot Add lead nose until balances have never seen Sailplane come out nose-heavy weight always added nose can balance slightly ahead cen \ ter gravity CG point shown plans no means get behind first flight coming AlP dont have CG spot marked plans want know mark came usually about 33% mean aerodynamic chord MAC RC Sailplanes especially beginner types Mean aerodynamic chord theres good term What Mean stands average ornery Chord width wing Aerodynamic means part doing lifting mean aero dynamic chord purposes average average chord root chord average chord wing area divided wing span Both measurements should plans kit box top measure span consult childs math geometry book figure out area rectangles triangles make up wing root chord width wing fuselage So MAC root chord chord 2 MAC will figure 5 12 THROW STRAIGHT OUT NOT UP depending wing Now put MAC plane plane has straight trailing edge leading edge tapers back will trailing edge root forward Oppositely leading edge straight trailing edge tapers forward will leading edge root back both taper evenly will cen tered root chord taper unevenly will off either fore aft Guestimate Calculate 33% MAC mark front MAC will balance first flights Check make sure controls move proper direction Left rudder stick makes rudder go left side plane Back elevator stick makes trail ing edge elevator stab go up Spoilers have going ignored now Rudder throw should about 25 30 degrees side Elevator stab move ment should very little Make adjust ments servo arms control horns get amount Moving out servo arm gives throw Moving out control horn gives less throw Adjust devises rudder centered elevator level transmitter trims center positions Lets go field will first hand launch Sailplane before will just run Turn trans mitter receiver holding plane just over head dead level run wind plane wants pull up Dive Test GOOD FOR TRAINERS GOOD FOR HIGH PERFORMANCE February 198555 dive make trim adjustment transmitter same wants turn severe cant trimmed out transmitter trims make clevis adjustments until feels like just wants lift straight out hand essential run directly wind point nose horizon Now run give good push straight horizon spot well out front throw plane up ward should glide straight level nose comes up wants stall put some down trim dives put some up turns put rudder trim glides straight level ready high-start launch First make sure tow hook secure mounted plans said should slightly ahead balance point first flights never behind Another test like make new plane rest ground pick up wing tip other resting ground Now gently bounce plane should no pops creaks uneven bending along wing wing breaks consider yourself lucky surely would have broken tow much disastrous results Now get high-start Pull back about maximum stretch using have light Two-Meter plane might pull back way have large heavy plane stretch way dont want launch too little pull Turn transmitter receiver Hook up plane wiggle sticks hear see surfaces move Just before launch wiggle sticks again make sure recheck radio times Ask of us have launched receiver off Throw plane Out slightly up should start climb very steeply heading out too flat very gently add lit tle back stick up trim going up too steeply havent popped off stalled yet feed little down might have use little rudder keep straight also very gently launch speeds controls very lively will climb up level off quite ways front may need dip nose pull up sharply get line come off breeze flying Keep nose wind big wide S-turns wind Adjust rudder trim plane flies straight elevator trim flat fairly slow glide later Land out front youway out front Sure looks neat guys come behind bring right feet its lot better walk long way pick up piece walk short way pick up lots pieces get real comfortable rights lefts can land closer transmitter trims set way straight-and-level flight look elevator rudder Through clevis adjustments set positions transmitter trims neutral positions Fly again see flies well trims set neutral adjust some Once flying well trims set neutral look rudder elevator again have lot rudder trimmed check warp wing uneven washout crooked fin banana fuselage theres snickering again tilted stab Fix problems possible have lot up down eleva tor need shim wing stab TO SAILPLANE TOW HOOK 10- TO 12-IN-OIA PARACHUTE assuming fixed stab moving eleva tor An all-flying stab no problem just reset fixed stab such Gentle Lady Windrifter Wanderer Olympic etc easier shim wing have lot up elevator raise leading edge wing have down elevator shim up trailing edge wing Shim small amounts /6 time Use temporary shims now until get Sailplane flying nice slow speed trim neutral elevator flat stab Afterward can make perma nent shim Now have flying fairly slow speed trims neutral surfaces level lets check balance point good amount altitude put plane steep dive about 30 degrees Hold dive until has picked up good speed let go stick What did Did pull up tuck under just stay dive flat-bottom airfoil beginner-type floater should pull out slowly does balance point CG just want means will want recover dive itself yet will start porpoise whenever picks up speed turn wind gust pulls up sharply have too much weight nose have fly lot up elevator keep nose up condition plane will always wanting stall porpoise tucks under need lead nose have fly lot down keep nose down plane will want get ever-steepening dive picks up speed very dan gerous situation will also extremely touchy unmanageable elevator ship semi-symmetrical airfoil other high performance sec tions found Sagitta Metrick Golden Eagle Pantera etc will work best CG set plane does pull up tuck under just continues straight dive allows Continued page 144 300- TO 400-Fr OF 60-LB-TEST MONOFILAMENT OR NYLON LINE 12-IN METAL SPIKE ___________________/ 100 Fr OF 1/4 OR 3/16-IN-OIA SURGICAL RUBBER TUBING / STRETCH UNTIL IT PULLS APPROX 12 LB Diagram shows basics high-start system easiest ieast expensive method iaunching RC Saliplane flat iand Sometimes caiied catapuit iaunching author prefers call kite iaunching because vioient terms catapult wouid suggest Sailplane puiied air much like kite high-start consists stake spike surgicai tubing string monofiiament nyion parachute tow ring may bought compiete units several manufacturers ocal hobby shop included will reel winding up storing high-start line could build own high-start cost will probably higher purchased unit unless have economical source surgical tubing use high-start stretched 31/2 times length tubing using 100 ft surgical tubing means stretching 350 ft pull should about 8 lb lightweight Two-Meter ship up 14 lb Standard Unlimited-class Sailpianes Illustrations Chuck Fisher 56Model Aviation PILOTS TS RIOR TS T THE MOST SUPERIOR PILOT FIGURE ON THE MARKET LIGHTEST WEIGHT MOST REALISTIC AVAILABLE GIVE YOUR PLANE PILOT YOUR NEWEST OLDEST OR NEXT CREATION R YOURS TODAY FULL FIGURES CIVILIANWWII MILITARY 1/3 Scale $19951/5 Navy $1395 1/4 Scale14951/6AAF1195 1/5 Scale1295 L 1/12 Scale895 1/12 Chopper 895 Plus $250 shipping figure KNIGHTS OF THE AIR 7148 Lasting Light Way Columbia MD 21045 301-730-5596 FOAM WING CORES RC Giant Scale/Beckman CLJTOM FOAM CUTTING Continued page 141 Bangers article October 1981 issue MA As mentioned earlier objectives keep cost proj ect downway down As did prelim inary mental preparations keeping eye out anything cheap would useful first thing came across some foam core board friend graphics artist several sheets light firm M6-in-thick material never seen before stuff lying around unused wanted get rid latched onto Now know consider foam core cheap Until recently never paid anything four bucks sheet its still cheap first got stuff really didnt know what go ing itit just looked too good pass up time taking place wasnt much information about Giant Scale available fact term Giant Scale wasnt use just matter making model bit larger general use Actu ally models size werent new since routinely built 7A-ft-span radio-control models back early Fif ties thing new chainsaw-type engine its higher power desirable its higher vibration level undesirable knew right start needed spruce basic struc tural strength fitted financial plans project since balsa would too expensive strong enough things people have ask ing about comment pro cured learned cut spruce did indeed plan tell details what did future column things churning around head trying decide subject first monster effort additional cumshaw item served help selection some time aware fact thin tempered-aluminum sheets used offset printing often available free very little cost windfall similar lighter-gauge material photographer friend tipped scales wanted build Golden Age biplane much alumi num surface possible hadnt found free fabric yet wanted biplane cabane struts pain Spar rowhawk won hands down Sparrowhawk presented challenging problems out lined mentally advance con verted hardware proper time project proceeded first landing gear described May 1980 issue MA intend describe rest fasci nating tale unfolds future columns Well its fascinating Personal note want thank modeling friends across country have phone mall person ex pressed concern column has missing issue combina tion health problems business pres sures has made difficult devote necessary time write month during past year Im happy say health problems seem under control business pressures increasing thats indica tion may soon able afford tube glue need finish Sparrowhawk issue marks end fifth year have doing column hope continue some years come efforts may somewhat spotty See April Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 Setting Up/Morris Continued page 56 experienced flier build up great speed search lift make speed runs having fight hold plane down will stay puts Add remove lead nose retrim before fairly slow flight level elevator Now can play 144Model Aviation Uustom Uut u-iau 1Ut I-use 1W information contact$14995 OCEAN SlATE AEROMODEL ENGINEERING 21 Jaycee Dr West Wermck RI 02893 401 3288813Dealer 8 Kit Manufacturers Inquiries Invited Foam Its Beat Deal Beat Custom Built Models .jieLJD 2036 N Thorn Ave a mFresno CA 93704 6 pmOrder Phone 1209 233-1050lask Bill LOVE fly HATE build Contact ve solution problem Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc. - IF1yWhatIDui1d elevator throw Unless plan aerobatics need very little stage youre probably just trying fly two trim settings need know about minimum sink maxi mum glide angle Minimum sink will very slow flying speed just below stall gilder coming down slowest trim will use lift Maximum glide angle plane covering ground amount altitude lost will fair ly fast flying speed isthe trim used looking lift getting out areas sink gliders can see pick up speed feed down trim suddenly flatten out really move called getting step' want adjust elevator throw full up trim plane just starting stall mush out Minimum sink will just below Max imum glide angle should just below neutral trim setting harder find just have fly fly will flying somewhere between two settings fun part trim settings will change dayto-day depending wind temperature humidity etc talked about mean aerodynamic chord earlier wing loading also good figure know can impress buddies rattling off Wing loading weight plane ounces divided wing area square feet Wing area square feet area square inches divided 144 wing loading will figure oz/ft2 flat-bottom-airfoiled floater like Olym pic Windrifter Wanderer Gentle Lady etc will have wing loading somewhere between 6 8 oz/ft2 higher-per formance plane like Sagitta Metrick Golden Eagle Pantera etc will be tween 8 10 oz/ft2 very high-per formance ship like Bounty Hunter Camaro Fiesta Antares etc will be tween 10 14 oz/ft2 can increased addition lead ballast CG will make plane fly faster very useful windy days other adjustment can make improve performance tow hook position farther back set steeper plane will climb tow moved too far back plane will get very wild tow Move back far dare very small increments Also adding up trim back stick launch will steepen climb Again too much plane will get very violent stall towa very scary situation Add much dare covers basics setting up Sailplane fly well Flying well something different best advice practice practice practice can practice experienced flier can ing beep indicating time up F3B finalists California using clever system time over six minutes could least recorded six-minute Duration task would set one-six-zero-zero thereby starting off 1600 Ignoring first digit 1 still accurate time-remaining read out Flights over six minutes usually few seconds past mark readout say 0954 meant buddy six seconds over time could checked against official scorer watch called Micronta can clipped belt stood upright display desk table can attached small plate ferrous metal attached transmitter means small magnet its back Nice gadget Its history now Soaring Union Los Angeles SULA did magnificent job running F3B team selection finals last Labor Day weekend plus ex tra day lot club folks pitched few showed talents werent just RC field club has everything might want take few notes Ed Depues contributiona transmitter impound rack Photos tell story advantages February 1985145 coach spotting working lift Regardless practice RC Soaring/Pruss Continued page 43
Edition: Model Aviation - 1985/02
Page Numbers: 54, 55, 56, 144, 145
There few very important things should right before attempting high-start winch launch new RC Sail plane author discusses new activity reminder old hands Pancho N Morris New ~iIpIane THIS ARTICLE intended help newcomer trim out first RC Sailplane can also refresher us things dont remember have stolen borrowed material too good writers remem ber should acknowledged will assume ship built covered surfaces should square fuselage rudder should exactly vertical respect stabilizer stab right angles fuselage top front wing stab should aligned perfectly fix Yes airplane will fly somewhat off wont fly well efficiently Besides everyone field will snicker behind back 54Model Aviation author Pancho Morris looks confident begins aunch Saiipiane because has attended preiiminaries recommended herein Photograph Allan Beutier // RUN STRAIGHT INTO THE WIND WITH THE PLANE LEVEL Next importantly wing must have warps best way check look wing trailing edge Looking very center wing look bottom wing slowly rotate leading edge upward glancing side side leading edge should disappear same time both wings large poly hedral wing easiest distance behind sailplane requiring helper plug-on wings plane check both wings have same incidence angle relationship fuselage warps get out old iron heat gun twist warps out reshrink covering Check recheck until get wing perfect little warp makes big turn again nothings worse hearing guys snicker Now have perfectly flat might want warp Im talking about washout mysterious term always hear having trailing edge wing tip slightly higher leading edge Without getting too technical im possible makes wing tips stall stop flying before center wing stalls slow down ship too much makes plane drop straight forward tip stalls first plane does something bad real fast Alright have plane square straight washed-out Now lets balance place indicated plans good spot Add lead nose until balances have never seen Sailplane come out nose-heavy weight always added nose can balance slightly ahead cen \ ter gravity CG point shown plans no means get behind first flight coming AlP dont have CG spot marked plans want know mark came usually about 33% mean aerodynamic chord MAC RC Sailplanes especially beginner types Mean aerodynamic chord theres good term What Mean stands average ornery Chord width wing Aerodynamic means part doing lifting mean aero dynamic chord purposes average average chord root chord average chord wing area divided wing span Both measurements should plans kit box top measure span consult childs math geometry book figure out area rectangles triangles make up wing root chord width wing fuselage So MAC root chord chord 2 MAC will figure 5 12 THROW STRAIGHT OUT NOT UP depending wing Now put MAC plane plane has straight trailing edge leading edge tapers back will trailing edge root forward Oppositely leading edge straight trailing edge tapers forward will leading edge root back both taper evenly will cen tered root chord taper unevenly will off either fore aft Guestimate Calculate 33% MAC mark front MAC will balance first flights Check make sure controls move proper direction Left rudder stick makes rudder go left side plane Back elevator stick makes trail ing edge elevator stab go up Spoilers have going ignored now Rudder throw should about 25 30 degrees side Elevator stab move ment should very little Make adjust ments servo arms control horns get amount Moving out servo arm gives throw Moving out control horn gives less throw Adjust devises rudder centered elevator level transmitter trims center positions Lets go field will first hand launch Sailplane before will just run Turn trans mitter receiver holding plane just over head dead level run wind plane wants pull up Dive Test GOOD FOR TRAINERS GOOD FOR HIGH PERFORMANCE February 198555 dive make trim adjustment transmitter same wants turn severe cant trimmed out transmitter trims make clevis adjustments until feels like just wants lift straight out hand essential run directly wind point nose horizon Now run give good push straight horizon spot well out front throw plane up ward should glide straight level nose comes up wants stall put some down trim dives put some up turns put rudder trim glides straight level ready high-start launch First make sure tow hook secure mounted plans said should slightly ahead balance point first flights never behind Another test like make new plane rest ground pick up wing tip other resting ground Now gently bounce plane should no pops creaks uneven bending along wing wing breaks consider yourself lucky surely would have broken tow much disastrous results Now get high-start Pull back about maximum stretch using have light Two-Meter plane might pull back way have large heavy plane stretch way dont want launch too little pull Turn transmitter receiver Hook up plane wiggle sticks hear see surfaces move Just before launch wiggle sticks again make sure recheck radio times Ask of us have launched receiver off Throw plane Out slightly up should start climb very steeply heading out too flat very gently add lit tle back stick up trim going up too steeply havent popped off stalled yet feed little down might have use little rudder keep straight also very gently launch speeds controls very lively will climb up level off quite ways front may need dip nose pull up sharply get line come off breeze flying Keep nose wind big wide S-turns wind Adjust rudder trim plane flies straight elevator trim flat fairly slow glide later Land out front youway out front Sure looks neat guys come behind bring right feet its lot better walk long way pick up piece walk short way pick up lots pieces get real comfortable rights lefts can land closer transmitter trims set way straight-and-level flight look elevator rudder Through clevis adjustments set positions transmitter trims neutral positions Fly again see flies well trims set neutral adjust some Once flying well trims set neutral look rudder elevator again have lot rudder trimmed check warp wing uneven washout crooked fin banana fuselage theres snickering again tilted stab Fix problems possible have lot up down eleva tor need shim wing stab TO SAILPLANE TOW HOOK 10- TO 12-IN-OIA PARACHUTE assuming fixed stab moving eleva tor An all-flying stab no problem just reset fixed stab such Gentle Lady Windrifter Wanderer Olympic etc easier shim wing have lot up elevator raise leading edge wing have down elevator shim up trailing edge wing Shim small amounts /6 time Use temporary shims now until get Sailplane flying nice slow speed trim neutral elevator flat stab Afterward can make perma nent shim Now have flying fairly slow speed trims neutral surfaces level lets check balance point good amount altitude put plane steep dive about 30 degrees Hold dive until has picked up good speed let go stick What did Did pull up tuck under just stay dive flat-bottom airfoil beginner-type floater should pull out slowly does balance point CG just want means will want recover dive itself yet will start porpoise whenever picks up speed turn wind gust pulls up sharply have too much weight nose have fly lot up elevator keep nose up condition plane will always wanting stall porpoise tucks under need lead nose have fly lot down keep nose down plane will want get ever-steepening dive picks up speed very dan gerous situation will also extremely touchy unmanageable elevator ship semi-symmetrical airfoil other high performance sec tions found Sagitta Metrick Golden Eagle Pantera etc will work best CG set plane does pull up tuck under just continues straight dive allows Continued page 144 300- TO 400-Fr OF 60-LB-TEST MONOFILAMENT OR NYLON LINE 12-IN METAL SPIKE ___________________/ 100 Fr OF 1/4 OR 3/16-IN-OIA SURGICAL RUBBER TUBING / STRETCH UNTIL IT PULLS APPROX 12 LB Diagram shows basics high-start system easiest ieast expensive method iaunching RC Saliplane flat iand Sometimes caiied catapuit iaunching author prefers call kite iaunching because vioient terms catapult wouid suggest Sailplane puiied air much like kite high-start consists stake spike surgicai tubing string monofiiament nyion parachute tow ring may bought compiete units several manufacturers ocal hobby shop included will reel winding up storing high-start line could build own high-start cost will probably higher purchased unit unless have economical source surgical tubing use high-start stretched 31/2 times length tubing using 100 ft surgical tubing means stretching 350 ft pull should about 8 lb lightweight Two-Meter ship up 14 lb Standard Unlimited-class Sailpianes Illustrations Chuck Fisher 56Model Aviation PILOTS TS RIOR TS T THE MOST SUPERIOR PILOT FIGURE ON THE MARKET LIGHTEST WEIGHT MOST REALISTIC AVAILABLE GIVE YOUR PLANE PILOT YOUR NEWEST OLDEST OR NEXT CREATION R YOURS TODAY FULL FIGURES CIVILIANWWII MILITARY 1/3 Scale $19951/5 Navy $1395 1/4 Scale14951/6AAF1195 1/5 Scale1295 L 1/12 Scale895 1/12 Chopper 895 Plus $250 shipping figure KNIGHTS OF THE AIR 7148 Lasting Light Way Columbia MD 21045 301-730-5596 FOAM WING CORES RC Giant Scale/Beckman CLJTOM FOAM CUTTING Continued page 141 Bangers article October 1981 issue MA As mentioned earlier objectives keep cost proj ect downway down As did prelim inary mental preparations keeping eye out anything cheap would useful first thing came across some foam core board friend graphics artist several sheets light firm M6-in-thick material never seen before stuff lying around unused wanted get rid latched onto Now know consider foam core cheap Until recently never paid anything four bucks sheet its still cheap first got stuff really didnt know what go ing itit just looked too good pass up time taking place wasnt much information about Giant Scale available fact term Giant Scale wasnt use just matter making model bit larger general use Actu ally models size werent new since routinely built 7A-ft-span radio-control models back early Fif ties thing new chainsaw-type engine its higher power desirable its higher vibration level undesirable knew right start needed spruce basic struc tural strength fitted financial plans project since balsa would too expensive strong enough things people have ask ing about comment pro cured learned cut spruce did indeed plan tell details what did future column things churning around head trying decide subject first monster effort additional cumshaw item served help selection some time aware fact thin tempered-aluminum sheets used offset printing often available free very little cost windfall similar lighter-gauge material photographer friend tipped scales wanted build Golden Age biplane much alumi num surface possible hadnt found free fabric yet wanted biplane cabane struts pain Spar rowhawk won hands down Sparrowhawk presented challenging problems out lined mentally advance con verted hardware proper time project proceeded first landing gear described May 1980 issue MA intend describe rest fasci nating tale unfolds future columns Well its fascinating Personal note want thank modeling friends across country have phone mall person ex pressed concern column has missing issue combina tion health problems business pres sures has made difficult devote necessary time write month during past year Im happy say health problems seem under control business pressures increasing thats indica tion may soon able afford tube glue need finish Sparrowhawk issue marks end fifth year have doing column hope continue some years come efforts may somewhat spotty See April Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 Setting Up/Morris Continued page 56 experienced flier build up great speed search lift make speed runs having fight hold plane down will stay puts Add remove lead nose retrim before fairly slow flight level elevator Now can play 144Model Aviation Uustom Uut u-iau 1Ut I-use 1W information contact$14995 OCEAN SlATE AEROMODEL ENGINEERING 21 Jaycee Dr West Wermck RI 02893 401 3288813Dealer 8 Kit Manufacturers Inquiries Invited Foam Its Beat Deal Beat Custom Built Models .jieLJD 2036 N Thorn Ave a mFresno CA 93704 6 pmOrder Phone 1209 233-1050lask Bill LOVE fly HATE build Contact ve solution problem Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc. - IF1yWhatIDui1d elevator throw Unless plan aerobatics need very little stage youre probably just trying fly two trim settings need know about minimum sink maxi mum glide angle Minimum sink will very slow flying speed just below stall gilder coming down slowest trim will use lift Maximum glide angle plane covering ground amount altitude lost will fair ly fast flying speed isthe trim used looking lift getting out areas sink gliders can see pick up speed feed down trim suddenly flatten out really move called getting step' want adjust elevator throw full up trim plane just starting stall mush out Minimum sink will just below Max imum glide angle should just below neutral trim setting harder find just have fly fly will flying somewhere between two settings fun part trim settings will change dayto-day depending wind temperature humidity etc talked about mean aerodynamic chord earlier wing loading also good figure know can impress buddies rattling off Wing loading weight plane ounces divided wing area square feet Wing area square feet area square inches divided 144 wing loading will figure oz/ft2 flat-bottom-airfoiled floater like Olym pic Windrifter Wanderer Gentle Lady etc will have wing loading somewhere between 6 8 oz/ft2 higher-per formance plane like Sagitta Metrick Golden Eagle Pantera etc will be tween 8 10 oz/ft2 very high-per formance ship like Bounty Hunter Camaro Fiesta Antares etc will be tween 10 14 oz/ft2 can increased addition lead ballast CG will make plane fly faster very useful windy days other adjustment can make improve performance tow hook position farther back set steeper plane will climb tow moved too far back plane will get very wild tow Move back far dare very small increments Also adding up trim back stick launch will steepen climb Again too much plane will get very violent stall towa very scary situation Add much dare covers basics setting up Sailplane fly well Flying well something different best advice practice practice practice can practice experienced flier can ing beep indicating time up F3B finalists California using clever system time over six minutes could least recorded six-minute Duration task would set one-six-zero-zero thereby starting off 1600 Ignoring first digit 1 still accurate time-remaining read out Flights over six minutes usually few seconds past mark readout say 0954 meant buddy six seconds over time could checked against official scorer watch called Micronta can clipped belt stood upright display desk table can attached small plate ferrous metal attached transmitter means small magnet its back Nice gadget Its history now Soaring Union Los Angeles SULA did magnificent job running F3B team selection finals last Labor Day weekend plus ex tra day lot club folks pitched few showed talents werent just RC field club has everything might want take few notes Ed Depues contributiona transmitter impound rack Photos tell story advantages February 1985145 coach spotting working lift Regardless practice RC Soaring/Pruss Continued page 43
Edition: Model Aviation - 1985/02
Page Numbers: 54, 55, 56, 144, 145
There few very important things should right before attempting high-start winch launch new RC Sail plane author discusses new activity reminder old hands Pancho N Morris New ~iIpIane THIS ARTICLE intended help newcomer trim out first RC Sailplane can also refresher us things dont remember have stolen borrowed material too good writers remem ber should acknowledged will assume ship built covered surfaces should square fuselage rudder should exactly vertical respect stabilizer stab right angles fuselage top front wing stab should aligned perfectly fix Yes airplane will fly somewhat off wont fly well efficiently Besides everyone field will snicker behind back 54Model Aviation author Pancho Morris looks confident begins aunch Saiipiane because has attended preiiminaries recommended herein Photograph Allan Beutier // RUN STRAIGHT INTO THE WIND WITH THE PLANE LEVEL Next importantly wing must have warps best way check look wing trailing edge Looking very center wing look bottom wing slowly rotate leading edge upward glancing side side leading edge should disappear same time both wings large poly hedral wing easiest distance behind sailplane requiring helper plug-on wings plane check both wings have same incidence angle relationship fuselage warps get out old iron heat gun twist warps out reshrink covering Check recheck until get wing perfect little warp makes big turn again nothings worse hearing guys snicker Now have perfectly flat might want warp Im talking about washout mysterious term always hear having trailing edge wing tip slightly higher leading edge Without getting too technical im possible makes wing tips stall stop flying before center wing stalls slow down ship too much makes plane drop straight forward tip stalls first plane does something bad real fast Alright have plane square straight washed-out Now lets balance place indicated plans good spot Add lead nose until balances have never seen Sailplane come out nose-heavy weight always added nose can balance slightly ahead cen \ ter gravity CG point shown plans no means get behind first flight coming AlP dont have CG spot marked plans want know mark came usually about 33% mean aerodynamic chord MAC RC Sailplanes especially beginner types Mean aerodynamic chord theres good term What Mean stands average ornery Chord width wing Aerodynamic means part doing lifting mean aero dynamic chord purposes average average chord root chord average chord wing area divided wing span Both measurements should plans kit box top measure span consult childs math geometry book figure out area rectangles triangles make up wing root chord width wing fuselage So MAC root chord chord 2 MAC will figure 5 12 THROW STRAIGHT OUT NOT UP depending wing Now put MAC plane plane has straight trailing edge leading edge tapers back will trailing edge root forward Oppositely leading edge straight trailing edge tapers forward will leading edge root back both taper evenly will cen tered root chord taper unevenly will off either fore aft Guestimate Calculate 33% MAC mark front MAC will balance first flights Check make sure controls move proper direction Left rudder stick makes rudder go left side plane Back elevator stick makes trail ing edge elevator stab go up Spoilers have going ignored now Rudder throw should about 25 30 degrees side Elevator stab move ment should very little Make adjust ments servo arms control horns get amount Moving out servo arm gives throw Moving out control horn gives less throw Adjust devises rudder centered elevator level transmitter trims center positions Lets go field will first hand launch Sailplane before will just run Turn trans mitter receiver holding plane just over head dead level run wind plane wants pull up Dive Test GOOD FOR TRAINERS GOOD FOR HIGH PERFORMANCE February 198555 dive make trim adjustment transmitter same wants turn severe cant trimmed out transmitter trims make clevis adjustments until feels like just wants lift straight out hand essential run directly wind point nose horizon Now run give good push straight horizon spot well out front throw plane up ward should glide straight level nose comes up wants stall put some down trim dives put some up turns put rudder trim glides straight level ready high-start launch First make sure tow hook secure mounted plans said should slightly ahead balance point first flights never behind Another test like make new plane rest ground pick up wing tip other resting ground Now gently bounce plane should no pops creaks uneven bending along wing wing breaks consider yourself lucky surely would have broken tow much disastrous results Now get high-start Pull back about maximum stretch using have light Two-Meter plane might pull back way have large heavy plane stretch way dont want launch too little pull Turn transmitter receiver Hook up plane wiggle sticks hear see surfaces move Just before launch wiggle sticks again make sure recheck radio times Ask of us have launched receiver off Throw plane Out slightly up should start climb very steeply heading out too flat very gently add lit tle back stick up trim going up too steeply havent popped off stalled yet feed little down might have use little rudder keep straight also very gently launch speeds controls very lively will climb up level off quite ways front may need dip nose pull up sharply get line come off breeze flying Keep nose wind big wide S-turns wind Adjust rudder trim plane flies straight elevator trim flat fairly slow glide later Land out front youway out front Sure looks neat guys come behind bring right feet its lot better walk long way pick up piece walk short way pick up lots pieces get real comfortable rights lefts can land closer transmitter trims set way straight-and-level flight look elevator rudder Through clevis adjustments set positions transmitter trims neutral positions Fly again see flies well trims set neutral adjust some Once flying well trims set neutral look rudder elevator again have lot rudder trimmed check warp wing uneven washout crooked fin banana fuselage theres snickering again tilted stab Fix problems possible have lot up down eleva tor need shim wing stab TO SAILPLANE TOW HOOK 10- TO 12-IN-OIA PARACHUTE assuming fixed stab moving eleva tor An all-flying stab no problem just reset fixed stab such Gentle Lady Windrifter Wanderer Olympic etc easier shim wing have lot up elevator raise leading edge wing have down elevator shim up trailing edge wing Shim small amounts /6 time Use temporary shims now until get Sailplane flying nice slow speed trim neutral elevator flat stab Afterward can make perma nent shim Now have flying fairly slow speed trims neutral surfaces level lets check balance point good amount altitude put plane steep dive about 30 degrees Hold dive until has picked up good speed let go stick What did Did pull up tuck under just stay dive flat-bottom airfoil beginner-type floater should pull out slowly does balance point CG just want means will want recover dive itself yet will start porpoise whenever picks up speed turn wind gust pulls up sharply have too much weight nose have fly lot up elevator keep nose up condition plane will always wanting stall porpoise tucks under need lead nose have fly lot down keep nose down plane will want get ever-steepening dive picks up speed very dan gerous situation will also extremely touchy unmanageable elevator ship semi-symmetrical airfoil other high performance sec tions found Sagitta Metrick Golden Eagle Pantera etc will work best CG set plane does pull up tuck under just continues straight dive allows Continued page 144 300- TO 400-Fr OF 60-LB-TEST MONOFILAMENT OR NYLON LINE 12-IN METAL SPIKE ___________________/ 100 Fr OF 1/4 OR 3/16-IN-OIA SURGICAL RUBBER TUBING / STRETCH UNTIL IT PULLS APPROX 12 LB Diagram shows basics high-start system easiest ieast expensive method iaunching RC Saliplane flat iand Sometimes caiied catapuit iaunching author prefers call kite iaunching because vioient terms catapult wouid suggest Sailplane puiied air much like kite high-start consists stake spike surgicai tubing string monofiiament nyion parachute tow ring may bought compiete units several manufacturers ocal hobby shop included will reel winding up storing high-start line could build own high-start cost will probably higher purchased unit unless have economical source surgical tubing use high-start stretched 31/2 times length tubing using 100 ft surgical tubing means stretching 350 ft pull should about 8 lb lightweight Two-Meter ship up 14 lb Standard Unlimited-class Sailpianes Illustrations Chuck Fisher 56Model Aviation PILOTS TS RIOR TS T THE MOST SUPERIOR PILOT FIGURE ON THE MARKET LIGHTEST WEIGHT MOST REALISTIC AVAILABLE GIVE YOUR PLANE PILOT YOUR NEWEST OLDEST OR NEXT CREATION R YOURS TODAY FULL FIGURES CIVILIANWWII MILITARY 1/3 Scale $19951/5 Navy $1395 1/4 Scale14951/6AAF1195 1/5 Scale1295 L 1/12 Scale895 1/12 Chopper 895 Plus $250 shipping figure KNIGHTS OF THE AIR 7148 Lasting Light Way Columbia MD 21045 301-730-5596 FOAM WING CORES RC Giant Scale/Beckman CLJTOM FOAM CUTTING Continued page 141 Bangers article October 1981 issue MA As mentioned earlier objectives keep cost proj ect downway down As did prelim inary mental preparations keeping eye out anything cheap would useful first thing came across some foam core board friend graphics artist several sheets light firm M6-in-thick material never seen before stuff lying around unused wanted get rid latched onto Now know consider foam core cheap Until recently never paid anything four bucks sheet its still cheap first got stuff really didnt know what go ing itit just looked too good pass up time taking place wasnt much information about Giant Scale available fact term Giant Scale wasnt use just matter making model bit larger general use Actu ally models size werent new since routinely built 7A-ft-span radio-control models back early Fif ties thing new chainsaw-type engine its higher power desirable its higher vibration level undesirable knew right start needed spruce basic struc tural strength fitted financial plans project since balsa would too expensive strong enough things people have ask ing about comment pro cured learned cut spruce did indeed plan tell details what did future column things churning around head trying decide subject first monster effort additional cumshaw item served help selection some time aware fact thin tempered-aluminum sheets used offset printing often available free very little cost windfall similar lighter-gauge material photographer friend tipped scales wanted build Golden Age biplane much alumi num surface possible hadnt found free fabric yet wanted biplane cabane struts pain Spar rowhawk won hands down Sparrowhawk presented challenging problems out lined mentally advance con verted hardware proper time project proceeded first landing gear described May 1980 issue MA intend describe rest fasci nating tale unfolds future columns Well its fascinating Personal note want thank modeling friends across country have phone mall person ex pressed concern column has missing issue combina tion health problems business pres sures has made difficult devote necessary time write month during past year Im happy say health problems seem under control business pressures increasing thats indica tion may soon able afford tube glue need finish Sparrowhawk issue marks end fifth year have doing column hope continue some years come efforts may somewhat spotty See April Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 Setting Up/Morris Continued page 56 experienced flier build up great speed search lift make speed runs having fight hold plane down will stay puts Add remove lead nose retrim before fairly slow flight level elevator Now can play 144Model Aviation Uustom Uut u-iau 1Ut I-use 1W information contact$14995 OCEAN SlATE AEROMODEL ENGINEERING 21 Jaycee Dr West Wermck RI 02893 401 3288813Dealer 8 Kit Manufacturers Inquiries Invited Foam Its Beat Deal Beat Custom Built Models .jieLJD 2036 N Thorn Ave a mFresno CA 93704 6 pmOrder Phone 1209 233-1050lask Bill LOVE fly HATE build Contact ve solution problem Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc. - IF1yWhatIDui1d elevator throw Unless plan aerobatics need very little stage youre probably just trying fly two trim settings need know about minimum sink maxi mum glide angle Minimum sink will very slow flying speed just below stall gilder coming down slowest trim will use lift Maximum glide angle plane covering ground amount altitude lost will fair ly fast flying speed isthe trim used looking lift getting out areas sink gliders can see pick up speed feed down trim suddenly flatten out really move called getting step' want adjust elevator throw full up trim plane just starting stall mush out Minimum sink will just below Max imum glide angle should just below neutral trim setting harder find just have fly fly will flying somewhere between two settings fun part trim settings will change dayto-day depending wind temperature humidity etc talked about mean aerodynamic chord earlier wing loading also good figure know can impress buddies rattling off Wing loading weight plane ounces divided wing area square feet Wing area square feet area square inches divided 144 wing loading will figure oz/ft2 flat-bottom-airfoiled floater like Olym pic Windrifter Wanderer Gentle Lady etc will have wing loading somewhere between 6 8 oz/ft2 higher-per formance plane like Sagitta Metrick Golden Eagle Pantera etc will be tween 8 10 oz/ft2 very high-per formance ship like Bounty Hunter Camaro Fiesta Antares etc will be tween 10 14 oz/ft2 can increased addition lead ballast CG will make plane fly faster very useful windy days other adjustment can make improve performance tow hook position farther back set steeper plane will climb tow moved too far back plane will get very wild tow Move back far dare very small increments Also adding up trim back stick launch will steepen climb Again too much plane will get very violent stall towa very scary situation Add much dare covers basics setting up Sailplane fly well Flying well something different best advice practice practice practice can practice experienced flier can ing beep indicating time up F3B finalists California using clever system time over six minutes could least recorded six-minute Duration task would set one-six-zero-zero thereby starting off 1600 Ignoring first digit 1 still accurate time-remaining read out Flights over six minutes usually few seconds past mark readout say 0954 meant buddy six seconds over time could checked against official scorer watch called Micronta can clipped belt stood upright display desk table can attached small plate ferrous metal attached transmitter means small magnet its back Nice gadget Its history now Soaring Union Los Angeles SULA did magnificent job running F3B team selection finals last Labor Day weekend plus ex tra day lot club folks pitched few showed talents werent just RC field club has everything might want take few notes Ed Depues contributiona transmitter impound rack Photos tell story advantages February 1985145 coach spotting working lift Regardless practice RC Soaring/Pruss Continued page 43
Edition: Model Aviation - 1985/02
Page Numbers: 54, 55, 56, 144, 145
There few very important things should right before attempting high-start winch launch new RC Sail plane author discusses new activity reminder old hands Pancho N Morris New ~iIpIane THIS ARTICLE intended help newcomer trim out first RC Sailplane can also refresher us things dont remember have stolen borrowed material too good writers remem ber should acknowledged will assume ship built covered surfaces should square fuselage rudder should exactly vertical respect stabilizer stab right angles fuselage top front wing stab should aligned perfectly fix Yes airplane will fly somewhat off wont fly well efficiently Besides everyone field will snicker behind back 54Model Aviation author Pancho Morris looks confident begins aunch Saiipiane because has attended preiiminaries recommended herein Photograph Allan Beutier // RUN STRAIGHT INTO THE WIND WITH THE PLANE LEVEL Next importantly wing must have warps best way check look wing trailing edge Looking very center wing look bottom wing slowly rotate leading edge upward glancing side side leading edge should disappear same time both wings large poly hedral wing easiest distance behind sailplane requiring helper plug-on wings plane check both wings have same incidence angle relationship fuselage warps get out old iron heat gun twist warps out reshrink covering Check recheck until get wing perfect little warp makes big turn again nothings worse hearing guys snicker Now have perfectly flat might want warp Im talking about washout mysterious term always hear having trailing edge wing tip slightly higher leading edge Without getting too technical im possible makes wing tips stall stop flying before center wing stalls slow down ship too much makes plane drop straight forward tip stalls first plane does something bad real fast Alright have plane square straight washed-out Now lets balance place indicated plans good spot Add lead nose until balances have never seen Sailplane come out nose-heavy weight always added nose can balance slightly ahead cen \ ter gravity CG point shown plans no means get behind first flight coming AlP dont have CG spot marked plans want know mark came usually about 33% mean aerodynamic chord MAC RC Sailplanes especially beginner types Mean aerodynamic chord theres good term What Mean stands average ornery Chord width wing Aerodynamic means part doing lifting mean aero dynamic chord purposes average average chord root chord average chord wing area divided wing span Both measurements should plans kit box top measure span consult childs math geometry book figure out area rectangles triangles make up wing root chord width wing fuselage So MAC root chord chord 2 MAC will figure 5 12 THROW STRAIGHT OUT NOT UP depending wing Now put MAC plane plane has straight trailing edge leading edge tapers back will trailing edge root forward Oppositely leading edge straight trailing edge tapers forward will leading edge root back both taper evenly will cen tered root chord taper unevenly will off either fore aft Guestimate Calculate 33% MAC mark front MAC will balance first flights Check make sure controls move proper direction Left rudder stick makes rudder go left side plane Back elevator stick makes trail ing edge elevator stab go up Spoilers have going ignored now Rudder throw should about 25 30 degrees side Elevator stab move ment should very little Make adjust ments servo arms control horns get amount Moving out servo arm gives throw Moving out control horn gives less throw Adjust devises rudder centered elevator level transmitter trims center positions Lets go field will first hand launch Sailplane before will just run Turn trans mitter receiver holding plane just over head dead level run wind plane wants pull up Dive Test GOOD FOR TRAINERS GOOD FOR HIGH PERFORMANCE February 198555 dive make trim adjustment transmitter same wants turn severe cant trimmed out transmitter trims make clevis adjustments until feels like just wants lift straight out hand essential run directly wind point nose horizon Now run give good push straight horizon spot well out front throw plane up ward should glide straight level nose comes up wants stall put some down trim dives put some up turns put rudder trim glides straight level ready high-start launch First make sure tow hook secure mounted plans said should slightly ahead balance point first flights never behind Another test like make new plane rest ground pick up wing tip other resting ground Now gently bounce plane should no pops creaks uneven bending along wing wing breaks consider yourself lucky surely would have broken tow much disastrous results Now get high-start Pull back about maximum stretch using have light Two-Meter plane might pull back way have large heavy plane stretch way dont want launch too little pull Turn transmitter receiver Hook up plane wiggle sticks hear see surfaces move Just before launch wiggle sticks again make sure recheck radio times Ask of us have launched receiver off Throw plane Out slightly up should start climb very steeply heading out too flat very gently add lit tle back stick up trim going up too steeply havent popped off stalled yet feed little down might have use little rudder keep straight also very gently launch speeds controls very lively will climb up level off quite ways front may need dip nose pull up sharply get line come off breeze flying Keep nose wind big wide S-turns wind Adjust rudder trim plane flies straight elevator trim flat fairly slow glide later Land out front youway out front Sure looks neat guys come behind bring right feet its lot better walk long way pick up piece walk short way pick up lots pieces get real comfortable rights lefts can land closer transmitter trims set way straight-and-level flight look elevator rudder Through clevis adjustments set positions transmitter trims neutral positions Fly again see flies well trims set neutral adjust some Once flying well trims set neutral look rudder elevator again have lot rudder trimmed check warp wing uneven washout crooked fin banana fuselage theres snickering again tilted stab Fix problems possible have lot up down eleva tor need shim wing stab TO SAILPLANE TOW HOOK 10- TO 12-IN-OIA PARACHUTE assuming fixed stab moving eleva tor An all-flying stab no problem just reset fixed stab such Gentle Lady Windrifter Wanderer Olympic etc easier shim wing have lot up elevator raise leading edge wing have down elevator shim up trailing edge wing Shim small amounts /6 time Use temporary shims now until get Sailplane flying nice slow speed trim neutral elevator flat stab Afterward can make perma nent shim Now have flying fairly slow speed trims neutral surfaces level lets check balance point good amount altitude put plane steep dive about 30 degrees Hold dive until has picked up good speed let go stick What did Did pull up tuck under just stay dive flat-bottom airfoil beginner-type floater should pull out slowly does balance point CG just want means will want recover dive itself yet will start porpoise whenever picks up speed turn wind gust pulls up sharply have too much weight nose have fly lot up elevator keep nose up condition plane will always wanting stall porpoise tucks under need lead nose have fly lot down keep nose down plane will want get ever-steepening dive picks up speed very dan gerous situation will also extremely touchy unmanageable elevator ship semi-symmetrical airfoil other high performance sec tions found Sagitta Metrick Golden Eagle Pantera etc will work best CG set plane does pull up tuck under just continues straight dive allows Continued page 144 300- TO 400-Fr OF 60-LB-TEST MONOFILAMENT OR NYLON LINE 12-IN METAL SPIKE ___________________/ 100 Fr OF 1/4 OR 3/16-IN-OIA SURGICAL RUBBER TUBING / STRETCH UNTIL IT PULLS APPROX 12 LB Diagram shows basics high-start system easiest ieast expensive method iaunching RC Saliplane flat iand Sometimes caiied catapuit iaunching author prefers call kite iaunching because vioient terms catapult wouid suggest Sailplane puiied air much like kite high-start consists stake spike surgicai tubing string monofiiament nyion parachute tow ring may bought compiete units several manufacturers ocal hobby shop included will reel winding up storing high-start line could build own high-start cost will probably higher purchased unit unless have economical source surgical tubing use high-start stretched 31/2 times length tubing using 100 ft surgical tubing means stretching 350 ft pull should about 8 lb lightweight Two-Meter ship up 14 lb Standard Unlimited-class Sailpianes Illustrations Chuck Fisher 56Model Aviation PILOTS TS RIOR TS T THE MOST SUPERIOR PILOT FIGURE ON THE MARKET LIGHTEST WEIGHT MOST REALISTIC AVAILABLE GIVE YOUR PLANE PILOT YOUR NEWEST OLDEST OR NEXT CREATION R YOURS TODAY FULL FIGURES CIVILIANWWII MILITARY 1/3 Scale $19951/5 Navy $1395 1/4 Scale14951/6AAF1195 1/5 Scale1295 L 1/12 Scale895 1/12 Chopper 895 Plus $250 shipping figure KNIGHTS OF THE AIR 7148 Lasting Light Way Columbia MD 21045 301-730-5596 FOAM WING CORES RC Giant Scale/Beckman CLJTOM FOAM CUTTING Continued page 141 Bangers article October 1981 issue MA As mentioned earlier objectives keep cost proj ect downway down As did prelim inary mental preparations keeping eye out anything cheap would useful first thing came across some foam core board friend graphics artist several sheets light firm M6-in-thick material never seen before stuff lying around unused wanted get rid latched onto Now know consider foam core cheap Until recently never paid anything four bucks sheet its still cheap first got stuff really didnt know what go ing itit just looked too good pass up time taking place wasnt much information about Giant Scale available fact term Giant Scale wasnt use just matter making model bit larger general use Actu ally models size werent new since routinely built 7A-ft-span radio-control models back early Fif ties thing new chainsaw-type engine its higher power desirable its higher vibration level undesirable knew right start needed spruce basic struc tural strength fitted financial plans project since balsa would too expensive strong enough things people have ask ing about comment pro cured learned cut spruce did indeed plan tell details what did future column things churning around head trying decide subject first monster effort additional cumshaw item served help selection some time aware fact thin tempered-aluminum sheets used offset printing often available free very little cost windfall similar lighter-gauge material photographer friend tipped scales wanted build Golden Age biplane much alumi num surface possible hadnt found free fabric yet wanted biplane cabane struts pain Spar rowhawk won hands down Sparrowhawk presented challenging problems out lined mentally advance con verted hardware proper time project proceeded first landing gear described May 1980 issue MA intend describe rest fasci nating tale unfolds future columns Well its fascinating Personal note want thank modeling friends across country have phone mall person ex pressed concern column has missing issue combina tion health problems business pres sures has made difficult devote necessary time write month during past year Im happy say health problems seem under control business pressures increasing thats indica tion may soon able afford tube glue need finish Sparrowhawk issue marks end fifth year have doing column hope continue some years come efforts may somewhat spotty See April Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 Setting Up/Morris Continued page 56 experienced flier build up great speed search lift make speed runs having fight hold plane down will stay puts Add remove lead nose retrim before fairly slow flight level elevator Now can play 144Model Aviation Uustom Uut u-iau 1Ut I-use 1W information contact$14995 OCEAN SlATE AEROMODEL ENGINEERING 21 Jaycee Dr West Wermck RI 02893 401 3288813Dealer 8 Kit Manufacturers Inquiries Invited Foam Its Beat Deal Beat Custom Built Models .jieLJD 2036 N Thorn Ave a mFresno CA 93704 6 pmOrder Phone 1209 233-1050lask Bill LOVE fly HATE build Contact ve solution problem Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc. - IF1yWhatIDui1d elevator throw Unless plan aerobatics need very little stage youre probably just trying fly two trim settings need know about minimum sink maxi mum glide angle Minimum sink will very slow flying speed just below stall gilder coming down slowest trim will use lift Maximum glide angle plane covering ground amount altitude lost will fair ly fast flying speed isthe trim used looking lift getting out areas sink gliders can see pick up speed feed down trim suddenly flatten out really move called getting step' want adjust elevator throw full up trim plane just starting stall mush out Minimum sink will just below Max imum glide angle should just below neutral trim setting harder find just have fly fly will flying somewhere between two settings fun part trim settings will change dayto-day depending wind temperature humidity etc talked about mean aerodynamic chord earlier wing loading also good figure know can impress buddies rattling off Wing loading weight plane ounces divided wing area square feet Wing area square feet area square inches divided 144 wing loading will figure oz/ft2 flat-bottom-airfoiled floater like Olym pic Windrifter Wanderer Gentle Lady etc will have wing loading somewhere between 6 8 oz/ft2 higher-per formance plane like Sagitta Metrick Golden Eagle Pantera etc will be tween 8 10 oz/ft2 very high-per formance ship like Bounty Hunter Camaro Fiesta Antares etc will be tween 10 14 oz/ft2 can increased addition lead ballast CG will make plane fly faster very useful windy days other adjustment can make improve performance tow hook position farther back set steeper plane will climb tow moved too far back plane will get very wild tow Move back far dare very small increments Also adding up trim back stick launch will steepen climb Again too much plane will get very violent stall towa very scary situation Add much dare covers basics setting up Sailplane fly well Flying well something different best advice practice practice practice can practice experienced flier can ing beep indicating time up F3B finalists California using clever system time over six minutes could least recorded six-minute Duration task would set one-six-zero-zero thereby starting off 1600 Ignoring first digit 1 still accurate time-remaining read out Flights over six minutes usually few seconds past mark readout say 0954 meant buddy six seconds over time could checked against official scorer watch called Micronta can clipped belt stood upright display desk table can attached small plate ferrous metal attached transmitter means small magnet its back Nice gadget Its history now Soaring Union Los Angeles SULA did magnificent job running F3B team selection finals last Labor Day weekend plus ex tra day lot club folks pitched few showed talents werent just RC field club has everything might want take few notes Ed Depues contributiona transmitter impound rack Photos tell story advantages February 1985145 coach spotting working lift Regardless practice RC Soaring/Pruss Continued page 43