Free FIigh Indoor Bud Tenny Secrets or Trim Some indoor fliers havent flying long time simply assume secrets ad justment make winning models fly much better own limited context might true several model adjustments im prove models flight characteristics However three important model adjustments literally no secret since clearly visible model either flight rest Whats Biggest Flight Problem Probably persistent problem indoor models making handle full power launch Marginal models stall spiral down fly straight under high power several combinations weird distressing things Most time owner catches model re-launches find now behaves pretty well key high-torque part power burst pooped off cutting didoes time has launch ed again power level model can handle Three Fixes three adjustments can made workbenchwing twist stab tilt left thrust Normally indoor model designs have inboard wing little longer help control torque also important have wash-in trailing edge low least inboard center panel slight amount wash-out trailing edge high outer center panel Next stabilizer should tilted assist turn tilted toward left viewed front model has normal left turn Finally little bit left thrust may either necessary helpful Inspect very first pre-flight rou tine indoor model either new years old assemble complete model except prop hold arms length nose View head-on checking wing panel stab proper twist tilt Fig shows what should see assuming model has tip dihedral polyhedral except drawing exaggerated bit board center panel leading edge should high outboard center panel leading edge slightly low stab tilt should clearly visible wing tips twist ed should tiny bit same direction adjacent panel Otherwise tip twisted effect about same washed-out tips N***%% VTRAILING EDGE UP FIG p straight wing tends mini mize tip stall Excessive wash-in board tip causes high drag during power burst may also make tip stall crucial time Literally wing weak inboard tip stalls torque might wrap wing around fuselage Excess wash-out outboard tip may cause model lame-duck around circle outboard wing dragging low like wounded bird Fix model fails preflight inspection best plan fix before trying fly braced wings may possible use tiny amount solvent loosen wire shift amount twist unbraced wings best solution gently bend spars slightly making curve just enough restore install proper twist method bending spars safely follows refer also Fig 2 spar must curved down such rear spar inboard panel install wash-in place index finger middle finger top spar center thumb neath fingers Fig 2A Squeeze gent ly spar will bend slightly repeatedly moving fingers bit far ther along spar time make spar curve up place middle finger low spar beside thumb Fig 2b press down index finger Remem ber squeeze gently cracked spar last thing wing needs Stab Tilt Fixing stab tilt simple tail boom solidjust twist gently repeatedly until tilt fhe right amount right direction stab mounted rolled boom usually necessary block up fuselage stab fairly close table fix fuselage wont rotate Fig 3 Use either solvent very thin glue soften glue holds stab boom slide block under stab push proper tip high Watch carefully see ZAILING EDGE DOWN NOTE STAB TILT FIG 2a FIG 2b glue really softened block stab proper tilt let glue hard en again keep trying soften glue extreme cases might neces sary cut stab loose reglue Rubber Twist Flight Loads may model looks perfectly fine dur ing preflight checks moves off flying straight instead making nice climbing turn note stab tilt ed wrong way two things almost certainly wrongweak tail boom stab twist weak motor-stick models motor fully wound torsional forces will twist motor-stick stab tilt less bare model stick twists toomuch stab tilt goes away actually reverses Unfor tunately lot can done continued page 102 42 Model Aviation IR-lA Available 3 SizesAll featuring Hi-Strength EpoxyGlass fuselages super lightweight foam wing cores Formula 19 oz fuselage check cowl canopy joined lightweight wheelpants plywood parts foam wing cores plans 3-views instructions$4995 Quarter Midget6 oz fuselage cheek cowl canopy plywood parts foam wing cores plans 3-views structions Wheel pants available$2995 1/2A2-1/2 oz fuselage molded firewall foam wing cores plywood parts plans 3-views instruc tions$2295 Wheel PantsLightweight already joined Formula 15649 pair Quarter Midget$495 pair Epoxy-Glass 500Complies Club 500 Sport Pylon Rules Super strong epoxy glass fuselage 6-1/2 oz plywood parts foam cores plans instructions $4395 sheeted cores$5595 fuse/age on/y$289S LLS IG RTS 313 287-9320 20620 Emmett Taylor Ml 48180 prices FOB Detroit Dealer inquiries invited Shipping Costs $125 per order SEE US AT TOLEDO FF Indoor/Tenny continued page 42 fieldthe motor-stick must re placed strengthened tail boom too weak stab may wander re verse tilt stab slightly twisted may fly reverse tilt Either way stab twisted flight loads tend increase tilt proper direction model may usable Try warping bending stab spars produce pro per twist Left-Thrust The best way get leftthrust plan model built almost necessary use double thrust bearing bent wire can usually bent change thrust angle during test flying one-piece types made aluminum similar materials must cut looseand re-glued model has single thrust bearing field repairs adjustments can made running short length wire through fuselage prop shaft pushed sideways produce left thrust Fig 4 Later thrust angle can 1 FIG 4 noted duplicated double bearing address PO Box 545 Richard son Tex 75080 Safe Flying No Accident l/2A ships especially wind contend added weight plus increased area additional controls make easier stay out get out trouble Lets talk bit about thing hang front silly thing make go Eighty percent Q-500 racing rules state engine must absolutely stock out box must use carburetor comes engine must RC type Some clubs go far limit engine specific manufacturer such K&B 40 front rotor Perry Carb After purchase hunk alumi num carefully disassemble inspect thoroughly minute chips etc might inside todays method 6f mass production quality control spectors have hard time finding thing wrong engine Clean up burrs nicks find case crank sure piston fits accord ance manufactures specifications Check rod alignment fit rod should straight minimum sloppiness wrist pin crank pin Reassemble engine carefully Use light machine oil during process protect moving parts Never turn dry enginethis will damage lean run Torq head bolts case bolts evenly So same thing carburetor important check carb body rotating barrel foreign material Adjust carb per instructions fine tune after engine running next major item propeller Q-500 cannot modify prop So purchase prop very selec tive Especially notice hub sure flat both front rear surfaces hole center true hub surfaces. finish off front end areas al low spinner no cowls dont use spinner AMA prop nut must used Use spinner can really help Nowgo hobby shop buy Q-500 go race Now have pretty well covered virtues Q-500 would like men tion memo about replacement balsa Thats rightreplacement balsa company called Envoy Corp Phoenix Ariz promoting product called allsa quote memo cost should half less half current balsa prices Product quality should uniform high no flaws such warps knots ir regular density checks spits worn holes Characteristics other just den sity can specified programmed production Formed sheets will hold shape sheets blocks unlimited demension die-cut multicolored printed parts will put crunched stained balsa look shame know sounds too good true want try product get additional information write Envoy Corp PO Box 15917 Phoenix Ariz 85060 Keepem flying go fast turn left address 4477 136th Hawthorne Ca 90250 102 Model Aviation RC Pylon/Lane continued page 77 PYLON RACERS Accu-Boerd40 s 12 s 2 8 easy adjust brack ets hardwood construction perfect fuselage build ing board $3295 extra brackets $395 pair
Edition: Model Aviation - 1976/05
Page Numbers: 42, 102
Edition: Model Aviation - 1976/05
Page Numbers: 42, 102
Free FIigh Indoor Bud Tenny Secrets or Trim Some indoor fliers havent flying long time simply assume secrets ad justment make winning models fly much better own limited context might true several model adjustments im prove models flight characteristics However three important model adjustments literally no secret since clearly visible model either flight rest Whats Biggest Flight Problem Probably persistent problem indoor models making handle full power launch Marginal models stall spiral down fly straight under high power several combinations weird distressing things Most time owner catches model re-launches find now behaves pretty well key high-torque part power burst pooped off cutting didoes time has launch ed again power level model can handle Three Fixes three adjustments can made workbenchwing twist stab tilt left thrust Normally indoor model designs have inboard wing little longer help control torque also important have wash-in trailing edge low least inboard center panel slight amount wash-out trailing edge high outer center panel Next stabilizer should tilted assist turn tilted toward left viewed front model has normal left turn Finally little bit left thrust may either necessary helpful Inspect very first pre-flight rou tine indoor model either new years old assemble complete model except prop hold arms length nose View head-on checking wing panel stab proper twist tilt Fig shows what should see assuming model has tip dihedral polyhedral except drawing exaggerated bit board center panel leading edge should high outboard center panel leading edge slightly low stab tilt should clearly visible wing tips twist ed should tiny bit same direction adjacent panel Otherwise tip twisted effect about same washed-out tips N***%% VTRAILING EDGE UP FIG p straight wing tends mini mize tip stall Excessive wash-in board tip causes high drag during power burst may also make tip stall crucial time Literally wing weak inboard tip stalls torque might wrap wing around fuselage Excess wash-out outboard tip may cause model lame-duck around circle outboard wing dragging low like wounded bird Fix model fails preflight inspection best plan fix before trying fly braced wings may possible use tiny amount solvent loosen wire shift amount twist unbraced wings best solution gently bend spars slightly making curve just enough restore install proper twist method bending spars safely follows refer also Fig 2 spar must curved down such rear spar inboard panel install wash-in place index finger middle finger top spar center thumb neath fingers Fig 2A Squeeze gent ly spar will bend slightly repeatedly moving fingers bit far ther along spar time make spar curve up place middle finger low spar beside thumb Fig 2b press down index finger Remem ber squeeze gently cracked spar last thing wing needs Stab Tilt Fixing stab tilt simple tail boom solidjust twist gently repeatedly until tilt fhe right amount right direction stab mounted rolled boom usually necessary block up fuselage stab fairly close table fix fuselage wont rotate Fig 3 Use either solvent very thin glue soften glue holds stab boom slide block under stab push proper tip high Watch carefully see ZAILING EDGE DOWN NOTE STAB TILT FIG 2a FIG 2b glue really softened block stab proper tilt let glue hard en again keep trying soften glue extreme cases might neces sary cut stab loose reglue Rubber Twist Flight Loads may model looks perfectly fine dur ing preflight checks moves off flying straight instead making nice climbing turn note stab tilt ed wrong way two things almost certainly wrongweak tail boom stab twist weak motor-stick models motor fully wound torsional forces will twist motor-stick stab tilt less bare model stick twists toomuch stab tilt goes away actually reverses Unfor tunately lot can done continued page 102 42 Model Aviation IR-lA Available 3 SizesAll featuring Hi-Strength EpoxyGlass fuselages super lightweight foam wing cores Formula 19 oz fuselage check cowl canopy joined lightweight wheelpants plywood parts foam wing cores plans 3-views instructions$4995 Quarter Midget6 oz fuselage cheek cowl canopy plywood parts foam wing cores plans 3-views structions Wheel pants available$2995 1/2A2-1/2 oz fuselage molded firewall foam wing cores plywood parts plans 3-views instruc tions$2295 Wheel PantsLightweight already joined Formula 15649 pair Quarter Midget$495 pair Epoxy-Glass 500Complies Club 500 Sport Pylon Rules Super strong epoxy glass fuselage 6-1/2 oz plywood parts foam cores plans instructions $4395 sheeted cores$5595 fuse/age on/y$289S LLS IG RTS 313 287-9320 20620 Emmett Taylor Ml 48180 prices FOB Detroit Dealer inquiries invited Shipping Costs $125 per order SEE US AT TOLEDO FF Indoor/Tenny continued page 42 fieldthe motor-stick must re placed strengthened tail boom too weak stab may wander re verse tilt stab slightly twisted may fly reverse tilt Either way stab twisted flight loads tend increase tilt proper direction model may usable Try warping bending stab spars produce pro per twist Left-Thrust The best way get leftthrust plan model built almost necessary use double thrust bearing bent wire can usually bent change thrust angle during test flying one-piece types made aluminum similar materials must cut looseand re-glued model has single thrust bearing field repairs adjustments can made running short length wire through fuselage prop shaft pushed sideways produce left thrust Fig 4 Later thrust angle can 1 FIG 4 noted duplicated double bearing address PO Box 545 Richard son Tex 75080 Safe Flying No Accident l/2A ships especially wind contend added weight plus increased area additional controls make easier stay out get out trouble Lets talk bit about thing hang front silly thing make go Eighty percent Q-500 racing rules state engine must absolutely stock out box must use carburetor comes engine must RC type Some clubs go far limit engine specific manufacturer such K&B 40 front rotor Perry Carb After purchase hunk alumi num carefully disassemble inspect thoroughly minute chips etc might inside todays method 6f mass production quality control spectors have hard time finding thing wrong engine Clean up burrs nicks find case crank sure piston fits accord ance manufactures specifications Check rod alignment fit rod should straight minimum sloppiness wrist pin crank pin Reassemble engine carefully Use light machine oil during process protect moving parts Never turn dry enginethis will damage lean run Torq head bolts case bolts evenly So same thing carburetor important check carb body rotating barrel foreign material Adjust carb per instructions fine tune after engine running next major item propeller Q-500 cannot modify prop So purchase prop very selec tive Especially notice hub sure flat both front rear surfaces hole center true hub surfaces. finish off front end areas al low spinner no cowls dont use spinner AMA prop nut must used Use spinner can really help Nowgo hobby shop buy Q-500 go race Now have pretty well covered virtues Q-500 would like men tion memo about replacement balsa Thats rightreplacement balsa company called Envoy Corp Phoenix Ariz promoting product called allsa quote memo cost should half less half current balsa prices Product quality should uniform high no flaws such warps knots ir regular density checks spits worn holes Characteristics other just den sity can specified programmed production Formed sheets will hold shape sheets blocks unlimited demension die-cut multicolored printed parts will put crunched stained balsa look shame know sounds too good true want try product get additional information write Envoy Corp PO Box 15917 Phoenix Ariz 85060 Keepem flying go fast turn left address 4477 136th Hawthorne Ca 90250 102 Model Aviation RC Pylon/Lane continued page 77 PYLON RACERS Accu-Boerd40 s 12 s 2 8 easy adjust brack ets hardwood construction perfect fuselage build ing board $3295 extra brackets $395 pair
