RADIO CONTROL HELICOPTERS IM GOING present some ideas regarding subjects people have asked about including techniques adjusting idle needle valve seeing heavy helicopters really fly faster fixing broken tail rotor drive shaft Idle needle valve adjustments have become slightly complicated past few years introduction three-needle carburetor have found continuing use techniques Ive developed two-needle TN carb things stay little less complicated basic idea realize carburetor adjusts amount fuel going engine actually holds small amount fuel can seen easily pulling fuel line off engine its running engine continues run several seconds use quantity fuel carburetor gauge adjusting idle mixture Doing may seem strange first has worked years may find very helpful Now have talked about idle needle valve nv Im going talk about main nv does what its name impliesits main adjustment fuel entering engine Although main idle nv can interact other some carb designs have found its important get main nv adjusted first have determined amount fuel entering carb adjustment critical setting idle nv should adjusted put engine good two-cycle being too lean Once main nv adjusted bring engine idle stop rotor blades hold fmnly keep rotating should unintentionally bump throttle stick pinch fuel line between tank carb Although will stop fuel engine will continue run several seconds should see what happens during short time period Since fuel cut off Im driving engine lean condition would expect rpm increase slightly experience should increase three four seconds before engine starts die lack fuel However release fuel line before engine quits doesnt have restarted time making adjustments engine starts die almost immediately fuel line pinched idle mixture too lean needs fuel However idle nv engines very sensitive open about 1/ turn try pinch test again Continue open idle nv A-turn increments until engine increases rpm three four seconds before showing signs quitting idle mixture too rich perform pinch test rpm will increase three four seconds sounds right since rich condition means too much fuel carb case close idle mixture turn try pinch test again until correct mixture obtained Although have found pinch test work variety carbs throughout years will put ballpark final minor adjustments must made after checking idle performance seeing accelerates idle full speed Large adjustments made idle mixture may have effect main nv would mean another round adjustments refine main idle settings Although takes words write about technique may see its straightforward easy field once become familiar use few times subject heavy helicopters comes up time time some think have certain advantages fly faster correct explanation usually hear heavy helicopters flying faster light ones first can dive better because additional weight therefore pick up additional speed Second appear tilted forward level flight allows main rotor blades provide additional horizontal thrust As first point rock falls faster feather point tme its no reason make rock out helicopter really want pick up speed descending roll helicopter its back use lift rotor blades pull helicopter down will adding thrust weight helicopter will come down hurry As far forward flight concerned excess thrust main rotor system propels helicopter forward illustrate suppose helicopter has just enough power sustain hover Try lower nose get forward 110 Model Aviation Bristol Concept 30 able paint plastic canopy fin set bright red its standard white Picture-perfect day Valkyrie flying field brings L-R Bob Bronson Johnny Walker Bob Goebel Jerry Groves Tom Bristol out enjoy flying flight additional thrust rotor system helicopter has descend have add collective transition forward flightto provide additional lift needed maintain altitude provide extra thrust needed last few years shaft-driven tail rotors have become almost standard higher-priced helicopters replacing wire-driven tail rotors worked well years Although have never convinced shaftdriven variety worth added expense purpose discussion talk about simple inexpensive way fix shafts should break during crash Most shafts have seen made fiberglass some other such material Although metal ones composite material normally used because light rigid lucky modelers because makes relatively easy repair Start removing broken shaft its bearings tailboom may need order new bearings have use awhile can usually reused needed new tailboom relatively inexpensive itself can see looking broken shaft problem fitting two broken pieces together get straight strong use piece wooden outside corner molding available building supply store such Home Depot doesnt Radio Requires 4 Ch 5 Sei Wing span 54 Wing Area 520 sq Flying Wt 52 lbs Radio 4 oh 5 Servos Engine 40 46 2C 48 70 Price $17999 -I Combo wlThunder Tiger Pro-46 Engine 99 w/Tbunder Tiger F-543 4C Engine $32999 Piece Fiberglass cowl$1900 Fair Price Spare Parts Pacific Aeromodel Mfg Inc 15437 Proctor Aye City Industry CA 91745 http//wwwpacaeromodelcom E-mail info@Pacaeromndelcom Tom Bristol painted both Concepts made field boxes Excellent workmanship paint job along functional design makes boxes joy use matter molding looks long inside angle 900 will used keep shaft straight its two pieces being glued together lay piece Saran WrapTM some other thin plastic molding protect glue fit two broken pieces tubing together apply few drops CyA cyanoacrylate glue joint let penetrate place molding keep whole assembly straight may take few applications CyA light sanding between get strong enough hold hand gaps tube material has lost can filled baking soda drop CyA will make hard rock broken joint can wrapped light fiberglass cloth CyA cured should strong new local flying club just south Tampa FL Valkyries home helicopters fixed wings paved runway covered tables protect pilot machine Florida sun its great place spend few hours weekend during week club especially active during winter months snowbirds head south bring helicopters ever area please give call 941 748-6438 can give directions flying field Maybe can get flight two together d fuselage lade piece thin plywood wrapped around plyformers ,, wings 1/16 balsa fully symetrical wood parts pmred real heatshrink polyester Oracover Germany finisnen mien dazzling fuel-resis tant printing blue red Fuel tank wheels axles landing gear spinner canopy cowl decal & hardware package included Fast easy assembly Fully aerobatic hut stable enough novice pilot Please Send SASE veer Free Catalog ORDERS ONLY 800780-0100 Info 626-961-6199 626-330-9351 THE BEST IN EPOXY GLASS SIMI KITS WE USE EPOXY RESIN AND NOT CHEAPER POLYESTER NEW LASER CUTiINO nERVICE FW 1 90A5/AB 1/5TH SCAIE eo span epoxy fuselage Foam Wing stab nail EW 1900-9 115TH 5CALE 80 Span tpoxy Fuselage Foam Wing Stab nail ueat 09 Available F6F-3f F5 Hellcat 80 upon epoxy fuselage Foam wings tin stab F6F Hellcat 64 span Epoxy fuselage built up wing stab TBF AVENGER 1/6TH SCAlE 82 span Epoxy fuselage Eullt up wings slab OH MOSQUITO 124 sPAN Epoxy fuselage Beit pan Cowis upinnera Mt 163 116TH SCAIE 61 span Epoxy Fuselage Foam Wing Cores P51067 SPAN Epoxy FuselageCowi Scoop eule up Wing Tail US AGeNT FO BRIAN TArtaR OtN 55M MICK neEvta CALL FUR MORE IUFUREATIUN BUD PRICES lEST IN SCALE CATALOg SIU US agent tar BrItIsh magazinen DOD HOLMAN PLANS P0 BOX 741 SAN BERNARDINO CA 92402 909 885 3959 FAX 889 9307 IT OWN own machine shop Now can make own repairs build thiTgs youve imagined Easy tseno enperience reqtired Toll-f ree machining Versatileha make anything out ol metal wood plastic quality work Tight away AffordableThree models shading $995 GUARANTEED pay iteetf six months Sr PQYIRHQUSI Dept MA P0 Box 1517 Ann Arior Ml 4E1 06-1517 February 1998 113 Sukhoi 40 Sport Scale ARF Made USA
Edition: Model Aviation - 1998/02
Page Numbers: 110, 113
RADIO CONTROL HELICOPTERS IM GOING present some ideas regarding subjects people have asked about including techniques adjusting idle needle valve seeing heavy helicopters really fly faster fixing broken tail rotor drive shaft Idle needle valve adjustments have become slightly complicated past few years introduction three-needle carburetor have found continuing use techniques Ive developed two-needle TN carb things stay little less complicated basic idea realize carburetor adjusts amount fuel going engine actually holds small amount fuel can seen easily pulling fuel line off engine its running engine continues run several seconds use quantity fuel carburetor gauge adjusting idle mixture Doing may seem strange first has worked years may find very helpful Now have talked about idle needle valve nv Im going talk about main nv does what its name impliesits main adjustment fuel entering engine Although main idle nv can interact other some carb designs have found its important get main nv adjusted first have determined amount fuel entering carb adjustment critical setting idle nv should adjusted put engine good two-cycle being too lean Once main nv adjusted bring engine idle stop rotor blades hold fmnly keep rotating should unintentionally bump throttle stick pinch fuel line between tank carb Although will stop fuel engine will continue run several seconds should see what happens during short time period Since fuel cut off Im driving engine lean condition would expect rpm increase slightly experience should increase three four seconds before engine starts die lack fuel However release fuel line before engine quits doesnt have restarted time making adjustments engine starts die almost immediately fuel line pinched idle mixture too lean needs fuel However idle nv engines very sensitive open about 1/ turn try pinch test again Continue open idle nv A-turn increments until engine increases rpm three four seconds before showing signs quitting idle mixture too rich perform pinch test rpm will increase three four seconds sounds right since rich condition means too much fuel carb case close idle mixture turn try pinch test again until correct mixture obtained Although have found pinch test work variety carbs throughout years will put ballpark final minor adjustments must made after checking idle performance seeing accelerates idle full speed Large adjustments made idle mixture may have effect main nv would mean another round adjustments refine main idle settings Although takes words write about technique may see its straightforward easy field once become familiar use few times subject heavy helicopters comes up time time some think have certain advantages fly faster correct explanation usually hear heavy helicopters flying faster light ones first can dive better because additional weight therefore pick up additional speed Second appear tilted forward level flight allows main rotor blades provide additional horizontal thrust As first point rock falls faster feather point tme its no reason make rock out helicopter really want pick up speed descending roll helicopter its back use lift rotor blades pull helicopter down will adding thrust weight helicopter will come down hurry As far forward flight concerned excess thrust main rotor system propels helicopter forward illustrate suppose helicopter has just enough power sustain hover Try lower nose get forward 110 Model Aviation Bristol Concept 30 able paint plastic canopy fin set bright red its standard white Picture-perfect day Valkyrie flying field brings L-R Bob Bronson Johnny Walker Bob Goebel Jerry Groves Tom Bristol out enjoy flying flight additional thrust rotor system helicopter has descend have add collective transition forward flightto provide additional lift needed maintain altitude provide extra thrust needed last few years shaft-driven tail rotors have become almost standard higher-priced helicopters replacing wire-driven tail rotors worked well years Although have never convinced shaftdriven variety worth added expense purpose discussion talk about simple inexpensive way fix shafts should break during crash Most shafts have seen made fiberglass some other such material Although metal ones composite material normally used because light rigid lucky modelers because makes relatively easy repair Start removing broken shaft its bearings tailboom may need order new bearings have use awhile can usually reused needed new tailboom relatively inexpensive itself can see looking broken shaft problem fitting two broken pieces together get straight strong use piece wooden outside corner molding available building supply store such Home Depot doesnt Radio Requires 4 Ch 5 Sei Wing span 54 Wing Area 520 sq Flying Wt 52 lbs Radio 4 oh 5 Servos Engine 40 46 2C 48 70 Price $17999 -I Combo wlThunder Tiger Pro-46 Engine 99 w/Tbunder Tiger F-543 4C Engine $32999 Piece Fiberglass cowl$1900 Fair Price Spare Parts Pacific Aeromodel Mfg Inc 15437 Proctor Aye City Industry CA 91745 http//wwwpacaeromodelcom E-mail info@Pacaeromndelcom Tom Bristol painted both Concepts made field boxes Excellent workmanship paint job along functional design makes boxes joy use matter molding looks long inside angle 900 will used keep shaft straight its two pieces being glued together lay piece Saran WrapTM some other thin plastic molding protect glue fit two broken pieces tubing together apply few drops CyA cyanoacrylate glue joint let penetrate place molding keep whole assembly straight may take few applications CyA light sanding between get strong enough hold hand gaps tube material has lost can filled baking soda drop CyA will make hard rock broken joint can wrapped light fiberglass cloth CyA cured should strong new local flying club just south Tampa FL Valkyries home helicopters fixed wings paved runway covered tables protect pilot machine Florida sun its great place spend few hours weekend during week club especially active during winter months snowbirds head south bring helicopters ever area please give call 941 748-6438 can give directions flying field Maybe can get flight two together d fuselage lade piece thin plywood wrapped around plyformers ,, wings 1/16 balsa fully symetrical wood parts pmred real heatshrink polyester Oracover Germany finisnen mien dazzling fuel-resis tant printing blue red Fuel tank wheels axles landing gear spinner canopy cowl decal & hardware package included Fast easy assembly Fully aerobatic hut stable enough novice pilot Please Send SASE veer Free Catalog ORDERS ONLY 800780-0100 Info 626-961-6199 626-330-9351 THE BEST IN EPOXY GLASS SIMI KITS WE USE EPOXY RESIN AND NOT CHEAPER POLYESTER NEW LASER CUTiINO nERVICE FW 1 90A5/AB 1/5TH SCAIE eo span epoxy fuselage Foam Wing stab nail EW 1900-9 115TH 5CALE 80 Span tpoxy Fuselage Foam Wing Stab nail ueat 09 Available F6F-3f F5 Hellcat 80 upon epoxy fuselage Foam wings tin stab F6F Hellcat 64 span Epoxy fuselage built up wing stab TBF AVENGER 1/6TH SCAlE 82 span Epoxy fuselage Eullt up wings slab OH MOSQUITO 124 sPAN Epoxy fuselage Beit pan Cowis upinnera Mt 163 116TH SCAIE 61 span Epoxy Fuselage Foam Wing Cores P51067 SPAN Epoxy FuselageCowi Scoop eule up Wing Tail US AGeNT FO BRIAN TArtaR OtN 55M MICK neEvta CALL FUR MORE IUFUREATIUN BUD PRICES lEST IN SCALE CATALOg SIU US agent tar BrItIsh magazinen DOD HOLMAN PLANS P0 BOX 741 SAN BERNARDINO CA 92402 909 885 3959 FAX 889 9307 IT OWN own machine shop Now can make own repairs build thiTgs youve imagined Easy tseno enperience reqtired Toll-f ree machining Versatileha make anything out ol metal wood plastic quality work Tight away AffordableThree models shading $995 GUARANTEED pay iteetf six months Sr PQYIRHQUSI Dept MA P0 Box 1517 Ann Arior Ml 4E1 06-1517 February 1998 113 Sukhoi 40 Sport Scale ARF Made USA