Control Line Aerobatics Ted Fancher HI GROUP Probably consistent complaint receive monthly musings material cover too high-tech dont feel CL Stunt column should considered beginners forum nonetheless lot merit complaints response have undertaken aproject first thought would pain neck has proven both enjoyable educational built Sig Twister Most next two columns will fairly detailed coverage experiences deal ing Stunt viewpoint beginner Using commercially available supplies trying limit nearly uncontrollable urge make things better Im going build finish flight-trim profile Stunter appropriate anyone beginning pilot rank novice Intermediate new Advanced flier Ive luck Instamatic several pictures should accompany columns will help illustrate some techniques features Lets get hardware out way first chose Sig Twister kindly donated Mike Pratt Sig used both Merco 35 engine Tom Dixon box-stock OS 4OFP used TatTinder four-ounce profile tank modi fied uniflo hardware package included kit used exception bellcrank substituted Fancher Circular Crank am partial no significant value doing beginner level dont necessarily recommend wasnt going mention except fancy bellcrank caused some problems initial test flights didnt want think fault perfectly adequate Sig bellcrank later August 1987 61 Fancherized big wisser nose iengneneu rnfuselage reshaped rudder top deck Mods add modern aposarance helo define sides square maneuvers stock Sig Twister tor comparison Teds very simple adjustable lead-out guide stolen Bob Gieseke Neat covering flat wing tip obtained covering first before doing top bottom surfaces Continued page 159 Z-bend elevator pushrod 1 allows adjustment pushrod length trim eievasorisiap neusrams arrow pur1I Lu mwiuwury puiuiuu guideit keeps pushrod bending underairloads Guide made half Perfect iine clip wrapped copperwire epoxied place Simpie effective trim scheme R cut MonoKote trim sheets aid thin cardboard templates assure symmetry Uniflow-ized Taffinder profile tank mounts plywood tray bOItI slot scheme allows moving tank up/down get proper engine runs Look atthlckness fuselage evident engine cutout area 1/4-ln sheet balsa tripler has glued inboard side noseto add rigidity strengthen wing-to-fuselage joint Fuselage lenghtened three inches butt-glued balsa sheet ar row Note grain direction restyled fin rudder strength two ends tube meet glue together sure make tubing ends fit properly Ughtly sandpaper entire tire get flat finish wheel now ready painting required installation model writing item up Ithought another possible solution finding suitable tire wheels moderate size Go store sells vacuum cleaner parts suitable tire might fashioned round rubber belts used models vacuum cleaners driving carpet-cleaning brush wheel make three-to-four-inch-diameter size just might find appropriately sized belt Documentation something Scale modelers interested information comes way always welcome Cam Martin Virginia Beach VA sent note about book came across felt might worth mentioning column book called Great Aircraft Collections World author Bob Ogden 1986 publication contents book directly usable Scale documentation purposes does list names museums large aircraft collections around world typical museum collection profile contains name collection its geographic location list planes collection book does give specifics about data services might available various museums appears would have little work pen hand Another approach using resources museum might contact friend acquaint ance city near particular collection ask investigate get data pictures etc subject plane interested Cam indicates book available Walden Books chain $1495 subject books just recently looking through Zenith Aviation Books 1987 catalog discovered original Profile series pamphlets published England out print six years once becoming available Content new pamphlet same originals format text color centeffolds present time Profiles available about 40 popular aircraft too list build models entire series over 300 titles expected reprinted future now available listed Zeniths catalog price $250 wish obtain free copy Zeniths latest catalog write Zenith Aviation Books PO Box 1/MA067 Osceola WI 54020 catalog will sorry sent lists over 3000 books videotapes favorite subjectaviation Please send correspondenceespecially photosrelating CL Scale Bill Boss 7706 269th Street New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 61 covering wing tail Sigs new Supercote fuselage painted Pactra Formula U polyurethane spray can Trim colors Top Flite MonoKote trim sheetssticky MonoKote used Du-Bro 225-in wheels wheel retainers Du-Bro large pinned nylon hinges Carl Goldberg two-inch spinner also made liberal use new product called Fast Threads Ohio Superstar terrific little gadgets threaded brass inserts popular threads use 4 40s project same job blind mounting nuts except inserted visible side can literally inserted anywhere time choose Twister range kits appropriate project narrow uniformly high quality both materials performance narrowed field down Top Flite Tutor Sigs Banshee Twister Tutor modem three design opted against couple reasons wing smaller would prefer leading-edge planking tapered planform make decidedly complex building project Its certainly within range chance building tapered wing crooked always exists can wreak havoc Stunter Between very similar Banshee Twister chose latter because its simplicity primarily squared versus rounded wing tips its shorter nose build Banshee whack off 1 avoid bunch tail weight frankiy find appealing. Im guy has look time Although Sig wraps its kits clear plastic cant check out contents wouldnt concerned about buying kit sight unseen Sig famous its balsa isnt about risk reputation putting lousy wood kits wood found inappropriate /16 balsa flaps much too soft Flaps should very resistant twisting especially plan cover plastic material wont stiffen picked up sheet firm light Ao buck made both flaps redesigned rudder rudder bit good time mention Sig Ute-Ply used fuselage doublers too soft mounting engine directly will compress mounting bolts tightened resulting occasional loose engine Either substitute regu lar -in birch plywood add 6-in aluminum birch plywood pads top kit doublers didnt wished I also replaced -in-square balsa wing spars spruce intend cover Twister Banshee similar unsheeted openframework wing silkspan paint balsa adequate expect use plastic covering however will find adds almost no rigidity wood framework spruce spars will stiffen things up bit also add little bit extra comes handy should inadvertently land prematurely Modifications Aha knew Fancher couldnt resist didnt Besides youve prob ably noticed Twister looks bit different pictured box Ive incorporated two kinds changes think everyone should make basic kit would appeal fliers demand up-to-date performance area desirable modifications striking change use fastback-styled aft fuselage low-profile rudder rather stock bubble canopy tall rudder canopy style matter taste feel swept rudder profile important beginners modeler must fly off grass tall rudder very vulnerable damage kind inverted incident landing flip over will break off easily itself can also apply leverage break entire fuselage lowering its profile sweeping back nearly eliminate problem still have SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALSCA COMPLETE LINE OF RACING PARTS BEE FIREBALL & KAB PLUGS SID LINES RACING WHEELS QUICK FILLS ETC HE ALSO STOCK CARBON FIBER KLOTZ OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 55 & 7 LOOP RUBBER BANDS KSB SEELIG & IGNITION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNITiON SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLAYBOY SR K 1/2A TEXACO ENGINES & PARTS EVERYTHING YOU NEED FOR OLD TMERINCLUDING REPLICA OR WICK ENGINES August 1987 159 WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON WSA OR MASTERCARD OLD TIMER SUPPLIES ORDER BY NAIL OR PHONE 714 830-5162 SORRY NO CODJ VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER *1000 SHIPPING U HANDLING FEE *150 FOR INSURANCE ADD *100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX Y ROAMIN RESEARCH P0 Box 104 Dept 096-Il Yale MIch 8097 2 Ideal Power Pock Connector electrIC planes cars boats Designed high vibrat ion environment Cycled ten thousand times electrical failure tiEd Anderson Power Products Inc SORRY NO PERSONAL CHECKS OR COD ORDERS Only certified checks money orders accepted Minimum order $1000 tar three packages 4 Powerpoles $300 per package plus $100 ship ping handling CT residents add 750/ sales tax Prices subject change notice Dealer Inquiries Invited turther intormation dealer prices send SASE Bus Card SERMOS RIC SNAP CONNECTORS Cedar Corners Station Box 16787 Stamford CT 06905 attractive airplane Ive landed upside down several times date zero damage Less noticeable equally valuable addition -in balsa tripler inside nose applied over Lite-Ply doubler Profiles notorious being subject engine vibration wing/fuselage joint leading edge provides almost guaranteed stress crack additional area highstress joint pays big dividends Balsa sheet up -in thick actually preferable plans show fairlead flap-toelevator pushrod need dont air loads elevator applying Up control pushing pushrod will likely cause pushrod flex resulting reduction loss control simple fairlead can made either cotter pin half Perfectstyle line connector epoxied fuselage halfway between flaps elevators Performance-improving modifications stock design include following changes have proven successful prototype First tail has moved aft three inches Twister designed some time ago prevailing school thought shortcoupled ships way go tight cornering recent thinking has shown short tails better may fact detrimental Simply stated longer tail powerful since further center gravity CG Since powerful changes attitude airplane positively also stabilizes better level flight results ship maneuvers crisply asked stops turning immediately controls neutralized concise description perfect Stunt corner An added benefit since tail powerful CG can located further forward sacrificing cornering potential im proves line tension stability tracking consecutive maneuvers CG proto type full inch forward shown plans flies very brisk corners Try youll like lengthened tail butt-joining threeinch piece sheet balsa using slow-setting CyA glue resulting joint stronger wood Fill old stabilizer slot scrap cut out new tank-mounting system worthy atten tion As discussed Junes column Stunt engines run little weirdly profiles some means adjusting tank height important system consists cradle tank attached using double-sticky servomounting tape front back cradie vertical grooves about through short 4 -40 bolts attach tank/cradle fuselage using threaded inserts described earlier simply loosening screws tank can raised lowered after screws should retightened system effective simple use sanitary appearance checking out fuel system notice Taffinder tank has modified uniflow feed done opening tank stock fill-tube removed hole covered tin An ice pick used poke hole tank about ard outside rear corner -in copper tube soldered place just enters tank ending about Ii forward fuel pickup tube unfamiliar uniflow principle future column will deal length Suffice say point system described will result engine run remarkably consistent beginning end opposed conventional suction system characteristically runs progressively lean er tank empties function properly overflow tube must sealed flight exterior end uniflow tube must inside tank Note prototype tube solidly epoxied through fuselage flexible line connecting uniflo tube tank proper Notice simple adjustable lead-out guide used -in balsa wing tips inset piece basswood cut two-inch-long groove wide enough lead-out cable pass groove drilled -in holes quarter inch brass guides inserted adjust simply pull out brass tube move lead-out desired location reinsert tube tubes should either snug fit inserted small drop model cement secure wish install lead-outs perma nently location shown plan very close correct used forward CG allowedby longertail building Twister stock tall moment plan using CG shown plans would suggest lengthen forward lead-out holes ribs allow forward lead-out located just aft spar aft lead-out just fine shown olden days considered gospel have front lead-out CG Experience science has proven aint appropriate Proper lead-out location must provide natural sweep lines caused drag Next month well talk about some construc tion techniques make profile look spiffy Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Navy Carrier/Perry Continued page 62 closely control exhaust-gas leakage slide closed interior exhaust stack should slotted receive slide An alternative installing slide exhaust stack construct track slide can bolted exhaust stack using fittings provided attaching muffler plan describe such installation next column Rear-exhaust engines present different prob lem installing exhaust restrictor Because Continued page 162 160 Model Aviation R/c pI4GAZINE IVDEy 198fl I986 At-i INFO CONSTRUCTION REVIEWS HOW TOSc Six Maior Modeling MCgaZIOCS 9 2 Sfld 000K 0 MO Connectors Designed anything electrical requiring quick disconnects
Edition: Model Aviation - 1987/08
Page Numbers: 61, 159, 160
Control Line Aerobatics Ted Fancher HI GROUP Probably consistent complaint receive monthly musings material cover too high-tech dont feel CL Stunt column should considered beginners forum nonetheless lot merit complaints response have undertaken aproject first thought would pain neck has proven both enjoyable educational built Sig Twister Most next two columns will fairly detailed coverage experiences deal ing Stunt viewpoint beginner Using commercially available supplies trying limit nearly uncontrollable urge make things better Im going build finish flight-trim profile Stunter appropriate anyone beginning pilot rank novice Intermediate new Advanced flier Ive luck Instamatic several pictures should accompany columns will help illustrate some techniques features Lets get hardware out way first chose Sig Twister kindly donated Mike Pratt Sig used both Merco 35 engine Tom Dixon box-stock OS 4OFP used TatTinder four-ounce profile tank modi fied uniflo hardware package included kit used exception bellcrank substituted Fancher Circular Crank am partial no significant value doing beginner level dont necessarily recommend wasnt going mention except fancy bellcrank caused some problems initial test flights didnt want think fault perfectly adequate Sig bellcrank later August 1987 61 Fancherized big wisser nose iengneneu rnfuselage reshaped rudder top deck Mods add modern aposarance helo define sides square maneuvers stock Sig Twister tor comparison Teds very simple adjustable lead-out guide stolen Bob Gieseke Neat covering flat wing tip obtained covering first before doing top bottom surfaces Continued page 159 Z-bend elevator pushrod 1 allows adjustment pushrod length trim eievasorisiap neusrams arrow pur1I Lu mwiuwury puiuiuu guideit keeps pushrod bending underairloads Guide made half Perfect iine clip wrapped copperwire epoxied place Simpie effective trim scheme R cut MonoKote trim sheets aid thin cardboard templates assure symmetry Uniflow-ized Taffinder profile tank mounts plywood tray bOItI slot scheme allows moving tank up/down get proper engine runs Look atthlckness fuselage evident engine cutout area 1/4-ln sheet balsa tripler has glued inboard side noseto add rigidity strengthen wing-to-fuselage joint Fuselage lenghtened three inches butt-glued balsa sheet ar row Note grain direction restyled fin rudder strength two ends tube meet glue together sure make tubing ends fit properly Ughtly sandpaper entire tire get flat finish wheel now ready painting required installation model writing item up Ithought another possible solution finding suitable tire wheels moderate size Go store sells vacuum cleaner parts suitable tire might fashioned round rubber belts used models vacuum cleaners driving carpet-cleaning brush wheel make three-to-four-inch-diameter size just might find appropriately sized belt Documentation something Scale modelers interested information comes way always welcome Cam Martin Virginia Beach VA sent note about book came across felt might worth mentioning column book called Great Aircraft Collections World author Bob Ogden 1986 publication contents book directly usable Scale documentation purposes does list names museums large aircraft collections around world typical museum collection profile contains name collection its geographic location list planes collection book does give specifics about data services might available various museums appears would have little work pen hand Another approach using resources museum might contact friend acquaint ance city near particular collection ask investigate get data pictures etc subject plane interested Cam indicates book available Walden Books chain $1495 subject books just recently looking through Zenith Aviation Books 1987 catalog discovered original Profile series pamphlets published England out print six years once becoming available Content new pamphlet same originals format text color centeffolds present time Profiles available about 40 popular aircraft too list build models entire series over 300 titles expected reprinted future now available listed Zeniths catalog price $250 wish obtain free copy Zeniths latest catalog write Zenith Aviation Books PO Box 1/MA067 Osceola WI 54020 catalog will sorry sent lists over 3000 books videotapes favorite subjectaviation Please send correspondenceespecially photosrelating CL Scale Bill Boss 7706 269th Street New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 61 covering wing tail Sigs new Supercote fuselage painted Pactra Formula U polyurethane spray can Trim colors Top Flite MonoKote trim sheetssticky MonoKote used Du-Bro 225-in wheels wheel retainers Du-Bro large pinned nylon hinges Carl Goldberg two-inch spinner also made liberal use new product called Fast Threads Ohio Superstar terrific little gadgets threaded brass inserts popular threads use 4 40s project same job blind mounting nuts except inserted visible side can literally inserted anywhere time choose Twister range kits appropriate project narrow uniformly high quality both materials performance narrowed field down Top Flite Tutor Sigs Banshee Twister Tutor modem three design opted against couple reasons wing smaller would prefer leading-edge planking tapered planform make decidedly complex building project Its certainly within range chance building tapered wing crooked always exists can wreak havoc Stunter Between very similar Banshee Twister chose latter because its simplicity primarily squared versus rounded wing tips its shorter nose build Banshee whack off 1 avoid bunch tail weight frankiy find appealing. Im guy has look time Although Sig wraps its kits clear plastic cant check out contents wouldnt concerned about buying kit sight unseen Sig famous its balsa isnt about risk reputation putting lousy wood kits wood found inappropriate /16 balsa flaps much too soft Flaps should very resistant twisting especially plan cover plastic material wont stiffen picked up sheet firm light Ao buck made both flaps redesigned rudder rudder bit good time mention Sig Ute-Ply used fuselage doublers too soft mounting engine directly will compress mounting bolts tightened resulting occasional loose engine Either substitute regu lar -in birch plywood add 6-in aluminum birch plywood pads top kit doublers didnt wished I also replaced -in-square balsa wing spars spruce intend cover Twister Banshee similar unsheeted openframework wing silkspan paint balsa adequate expect use plastic covering however will find adds almost no rigidity wood framework spruce spars will stiffen things up bit also add little bit extra comes handy should inadvertently land prematurely Modifications Aha knew Fancher couldnt resist didnt Besides youve prob ably noticed Twister looks bit different pictured box Ive incorporated two kinds changes think everyone should make basic kit would appeal fliers demand up-to-date performance area desirable modifications striking change use fastback-styled aft fuselage low-profile rudder rather stock bubble canopy tall rudder canopy style matter taste feel swept rudder profile important beginners modeler must fly off grass tall rudder very vulnerable damage kind inverted incident landing flip over will break off easily itself can also apply leverage break entire fuselage lowering its profile sweeping back nearly eliminate problem still have SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALSCA COMPLETE LINE OF RACING PARTS BEE FIREBALL & KAB PLUGS SID LINES RACING WHEELS QUICK FILLS ETC HE ALSO STOCK CARBON FIBER KLOTZ OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 55 & 7 LOOP RUBBER BANDS KSB SEELIG & IGNITION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNITiON SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLAYBOY SR K 1/2A TEXACO ENGINES & PARTS EVERYTHING YOU NEED FOR OLD TMERINCLUDING REPLICA OR WICK ENGINES August 1987 159 WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON WSA OR MASTERCARD OLD TIMER SUPPLIES ORDER BY NAIL OR PHONE 714 830-5162 SORRY NO CODJ VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER *1000 SHIPPING U HANDLING FEE *150 FOR INSURANCE ADD *100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX Y ROAMIN RESEARCH P0 Box 104 Dept 096-Il Yale MIch 8097 2 Ideal Power Pock Connector electrIC planes cars boats Designed high vibrat ion environment Cycled ten thousand times electrical failure tiEd Anderson Power Products Inc SORRY NO PERSONAL CHECKS OR COD ORDERS Only certified checks money orders accepted Minimum order $1000 tar three packages 4 Powerpoles $300 per package plus $100 ship ping handling CT residents add 750/ sales tax Prices subject change notice Dealer Inquiries Invited turther intormation dealer prices send SASE Bus Card SERMOS RIC SNAP CONNECTORS Cedar Corners Station Box 16787 Stamford CT 06905 attractive airplane Ive landed upside down several times date zero damage Less noticeable equally valuable addition -in balsa tripler inside nose applied over Lite-Ply doubler Profiles notorious being subject engine vibration wing/fuselage joint leading edge provides almost guaranteed stress crack additional area highstress joint pays big dividends Balsa sheet up -in thick actually preferable plans show fairlead flap-toelevator pushrod need dont air loads elevator applying Up control pushing pushrod will likely cause pushrod flex resulting reduction loss control simple fairlead can made either cotter pin half Perfectstyle line connector epoxied fuselage halfway between flaps elevators Performance-improving modifications stock design include following changes have proven successful prototype First tail has moved aft three inches Twister designed some time ago prevailing school thought shortcoupled ships way go tight cornering recent thinking has shown short tails better may fact detrimental Simply stated longer tail powerful since further center gravity CG Since powerful changes attitude airplane positively also stabilizes better level flight results ship maneuvers crisply asked stops turning immediately controls neutralized concise description perfect Stunt corner An added benefit since tail powerful CG can located further forward sacrificing cornering potential im proves line tension stability tracking consecutive maneuvers CG proto type full inch forward shown plans flies very brisk corners Try youll like lengthened tail butt-joining threeinch piece sheet balsa using slow-setting CyA glue resulting joint stronger wood Fill old stabilizer slot scrap cut out new tank-mounting system worthy atten tion As discussed Junes column Stunt engines run little weirdly profiles some means adjusting tank height important system consists cradle tank attached using double-sticky servomounting tape front back cradie vertical grooves about through short 4 -40 bolts attach tank/cradle fuselage using threaded inserts described earlier simply loosening screws tank can raised lowered after screws should retightened system effective simple use sanitary appearance checking out fuel system notice Taffinder tank has modified uniflow feed done opening tank stock fill-tube removed hole covered tin An ice pick used poke hole tank about ard outside rear corner -in copper tube soldered place just enters tank ending about Ii forward fuel pickup tube unfamiliar uniflow principle future column will deal length Suffice say point system described will result engine run remarkably consistent beginning end opposed conventional suction system characteristically runs progressively lean er tank empties function properly overflow tube must sealed flight exterior end uniflow tube must inside tank Note prototype tube solidly epoxied through fuselage flexible line connecting uniflo tube tank proper Notice simple adjustable lead-out guide used -in balsa wing tips inset piece basswood cut two-inch-long groove wide enough lead-out cable pass groove drilled -in holes quarter inch brass guides inserted adjust simply pull out brass tube move lead-out desired location reinsert tube tubes should either snug fit inserted small drop model cement secure wish install lead-outs perma nently location shown plan very close correct used forward CG allowedby longertail building Twister stock tall moment plan using CG shown plans would suggest lengthen forward lead-out holes ribs allow forward lead-out located just aft spar aft lead-out just fine shown olden days considered gospel have front lead-out CG Experience science has proven aint appropriate Proper lead-out location must provide natural sweep lines caused drag Next month well talk about some construc tion techniques make profile look spiffy Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Navy Carrier/Perry Continued page 62 closely control exhaust-gas leakage slide closed interior exhaust stack should slotted receive slide An alternative installing slide exhaust stack construct track slide can bolted exhaust stack using fittings provided attaching muffler plan describe such installation next column Rear-exhaust engines present different prob lem installing exhaust restrictor Because Continued page 162 160 Model Aviation R/c pI4GAZINE IVDEy 198fl I986 At-i INFO CONSTRUCTION REVIEWS HOW TOSc Six Maior Modeling MCgaZIOCS 9 2 Sfld 000K 0 MO Connectors Designed anything electrical requiring quick disconnects
Edition: Model Aviation - 1987/08
Page Numbers: 61, 159, 160
Control Line Aerobatics Ted Fancher HI GROUP Probably consistent complaint receive monthly musings material cover too high-tech dont feel CL Stunt column should considered beginners forum nonetheless lot merit complaints response have undertaken aproject first thought would pain neck has proven both enjoyable educational built Sig Twister Most next two columns will fairly detailed coverage experiences deal ing Stunt viewpoint beginner Using commercially available supplies trying limit nearly uncontrollable urge make things better Im going build finish flight-trim profile Stunter appropriate anyone beginning pilot rank novice Intermediate new Advanced flier Ive luck Instamatic several pictures should accompany columns will help illustrate some techniques features Lets get hardware out way first chose Sig Twister kindly donated Mike Pratt Sig used both Merco 35 engine Tom Dixon box-stock OS 4OFP used TatTinder four-ounce profile tank modi fied uniflo hardware package included kit used exception bellcrank substituted Fancher Circular Crank am partial no significant value doing beginner level dont necessarily recommend wasnt going mention except fancy bellcrank caused some problems initial test flights didnt want think fault perfectly adequate Sig bellcrank later August 1987 61 Fancherized big wisser nose iengneneu rnfuselage reshaped rudder top deck Mods add modern aposarance helo define sides square maneuvers stock Sig Twister tor comparison Teds very simple adjustable lead-out guide stolen Bob Gieseke Neat covering flat wing tip obtained covering first before doing top bottom surfaces Continued page 159 Z-bend elevator pushrod 1 allows adjustment pushrod length trim eievasorisiap neusrams arrow pur1I Lu mwiuwury puiuiuu guideit keeps pushrod bending underairloads Guide made half Perfect iine clip wrapped copperwire epoxied place Simpie effective trim scheme R cut MonoKote trim sheets aid thin cardboard templates assure symmetry Uniflow-ized Taffinder profile tank mounts plywood tray bOItI slot scheme allows moving tank up/down get proper engine runs Look atthlckness fuselage evident engine cutout area 1/4-ln sheet balsa tripler has glued inboard side noseto add rigidity strengthen wing-to-fuselage joint Fuselage lenghtened three inches butt-glued balsa sheet ar row Note grain direction restyled fin rudder strength two ends tube meet glue together sure make tubing ends fit properly Ughtly sandpaper entire tire get flat finish wheel now ready painting required installation model writing item up Ithought another possible solution finding suitable tire wheels moderate size Go store sells vacuum cleaner parts suitable tire might fashioned round rubber belts used models vacuum cleaners driving carpet-cleaning brush wheel make three-to-four-inch-diameter size just might find appropriately sized belt Documentation something Scale modelers interested information comes way always welcome Cam Martin Virginia Beach VA sent note about book came across felt might worth mentioning column book called Great Aircraft Collections World author Bob Ogden 1986 publication contents book directly usable Scale documentation purposes does list names museums large aircraft collections around world typical museum collection profile contains name collection its geographic location list planes collection book does give specifics about data services might available various museums appears would have little work pen hand Another approach using resources museum might contact friend acquaint ance city near particular collection ask investigate get data pictures etc subject plane interested Cam indicates book available Walden Books chain $1495 subject books just recently looking through Zenith Aviation Books 1987 catalog discovered original Profile series pamphlets published England out print six years once becoming available Content new pamphlet same originals format text color centeffolds present time Profiles available about 40 popular aircraft too list build models entire series over 300 titles expected reprinted future now available listed Zeniths catalog price $250 wish obtain free copy Zeniths latest catalog write Zenith Aviation Books PO Box 1/MA067 Osceola WI 54020 catalog will sorry sent lists over 3000 books videotapes favorite subjectaviation Please send correspondenceespecially photosrelating CL Scale Bill Boss 7706 269th Street New Hyde Park NY 11040 CL Aerobatics/Fancher Continued page 61 covering wing tail Sigs new Supercote fuselage painted Pactra Formula U polyurethane spray can Trim colors Top Flite MonoKote trim sheetssticky MonoKote used Du-Bro 225-in wheels wheel retainers Du-Bro large pinned nylon hinges Carl Goldberg two-inch spinner also made liberal use new product called Fast Threads Ohio Superstar terrific little gadgets threaded brass inserts popular threads use 4 40s project same job blind mounting nuts except inserted visible side can literally inserted anywhere time choose Twister range kits appropriate project narrow uniformly high quality both materials performance narrowed field down Top Flite Tutor Sigs Banshee Twister Tutor modem three design opted against couple reasons wing smaller would prefer leading-edge planking tapered planform make decidedly complex building project Its certainly within range chance building tapered wing crooked always exists can wreak havoc Stunter Between very similar Banshee Twister chose latter because its simplicity primarily squared versus rounded wing tips its shorter nose build Banshee whack off 1 avoid bunch tail weight frankiy find appealing. Im guy has look time Although Sig wraps its kits clear plastic cant check out contents wouldnt concerned about buying kit sight unseen Sig famous its balsa isnt about risk reputation putting lousy wood kits wood found inappropriate /16 balsa flaps much too soft Flaps should very resistant twisting especially plan cover plastic material wont stiffen picked up sheet firm light Ao buck made both flaps redesigned rudder rudder bit good time mention Sig Ute-Ply used fuselage doublers too soft mounting engine directly will compress mounting bolts tightened resulting occasional loose engine Either substitute regu lar -in birch plywood add 6-in aluminum birch plywood pads top kit doublers didnt wished I also replaced -in-square balsa wing spars spruce intend cover Twister Banshee similar unsheeted openframework wing silkspan paint balsa adequate expect use plastic covering however will find adds almost no rigidity wood framework spruce spars will stiffen things up bit also add little bit extra comes handy should inadvertently land prematurely Modifications Aha knew Fancher couldnt resist didnt Besides youve prob ably noticed Twister looks bit different pictured box Ive incorporated two kinds changes think everyone should make basic kit would appeal fliers demand up-to-date performance area desirable modifications striking change use fastback-styled aft fuselage low-profile rudder rather stock bubble canopy tall rudder canopy style matter taste feel swept rudder profile important beginners modeler must fly off grass tall rudder very vulnerable damage kind inverted incident landing flip over will break off easily itself can also apply leverage break entire fuselage lowering its profile sweeping back nearly eliminate problem still have SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALSCA COMPLETE LINE OF RACING PARTS BEE FIREBALL & KAB PLUGS SID LINES RACING WHEELS QUICK FILLS ETC HE ALSO STOCK CARBON FIBER KLOTZ OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 & 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 55 & 7 LOOP RUBBER BANDS KSB SEELIG & IGNITION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNITiON SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLAYBOY SR K 1/2A TEXACO ENGINES & PARTS EVERYTHING YOU NEED FOR OLD TMERINCLUDING REPLICA OR WICK ENGINES August 1987 159 WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON WSA OR MASTERCARD OLD TIMER SUPPLIES ORDER BY NAIL OR PHONE 714 830-5162 SORRY NO CODJ VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER *1000 SHIPPING U HANDLING FEE *150 FOR INSURANCE ADD *100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX Y ROAMIN RESEARCH P0 Box 104 Dept 096-Il Yale MIch 8097 2 Ideal Power Pock Connector electrIC planes cars boats Designed high vibrat ion environment Cycled ten thousand times electrical failure tiEd Anderson Power Products Inc SORRY NO PERSONAL CHECKS OR COD ORDERS Only certified checks money orders accepted Minimum order $1000 tar three packages 4 Powerpoles $300 per package plus $100 ship ping handling CT residents add 750/ sales tax Prices subject change notice Dealer Inquiries Invited turther intormation dealer prices send SASE Bus Card SERMOS RIC SNAP CONNECTORS Cedar Corners Station Box 16787 Stamford CT 06905 attractive airplane Ive landed upside down several times date zero damage Less noticeable equally valuable addition -in balsa tripler inside nose applied over Lite-Ply doubler Profiles notorious being subject engine vibration wing/fuselage joint leading edge provides almost guaranteed stress crack additional area highstress joint pays big dividends Balsa sheet up -in thick actually preferable plans show fairlead flap-toelevator pushrod need dont air loads elevator applying Up control pushing pushrod will likely cause pushrod flex resulting reduction loss control simple fairlead can made either cotter pin half Perfectstyle line connector epoxied fuselage halfway between flaps elevators Performance-improving modifications stock design include following changes have proven successful prototype First tail has moved aft three inches Twister designed some time ago prevailing school thought shortcoupled ships way go tight cornering recent thinking has shown short tails better may fact detrimental Simply stated longer tail powerful since further center gravity CG Since powerful changes attitude airplane positively also stabilizes better level flight results ship maneuvers crisply asked stops turning immediately controls neutralized concise description perfect Stunt corner An added benefit since tail powerful CG can located further forward sacrificing cornering potential im proves line tension stability tracking consecutive maneuvers CG proto type full inch forward shown plans flies very brisk corners Try youll like lengthened tail butt-joining threeinch piece sheet balsa using slow-setting CyA glue resulting joint stronger wood Fill old stabilizer slot scrap cut out new tank-mounting system worthy atten tion As discussed Junes column Stunt engines run little weirdly profiles some means adjusting tank height important system consists cradle tank attached using double-sticky servomounting tape front back cradie vertical grooves about through short 4 -40 bolts attach tank/cradle fuselage using threaded inserts described earlier simply loosening screws tank can raised lowered after screws should retightened system effective simple use sanitary appearance checking out fuel system notice Taffinder tank has modified uniflow feed done opening tank stock fill-tube removed hole covered tin An ice pick used poke hole tank about ard outside rear corner -in copper tube soldered place just enters tank ending about Ii forward fuel pickup tube unfamiliar uniflow principle future column will deal length Suffice say point system described will result engine run remarkably consistent beginning end opposed conventional suction system characteristically runs progressively lean er tank empties function properly overflow tube must sealed flight exterior end uniflow tube must inside tank Note prototype tube solidly epoxied through fuselage flexible line connecting uniflo tube tank proper Notice simple adjustable lead-out guide used -in balsa wing tips inset piece basswood cut two-inch-long groove wide enough lead-out cable pass groove drilled -in holes quarter inch brass guides inserted adjust simply pull out brass tube move lead-out desired location reinsert tube tubes should either snug fit inserted small drop model cement secure wish install lead-outs perma nently location shown plan very close correct used forward CG allowedby longertail building Twister stock tall moment plan using CG shown plans would suggest lengthen forward lead-out holes ribs allow forward lead-out located just aft spar aft lead-out just fine shown olden days considered gospel have front lead-out CG Experience science has proven aint appropriate Proper lead-out location must provide natural sweep lines caused drag Next month well talk about some construc tion techniques make profile look spiffy Ted Fancher 158 Flying Cloud Isle Foster City CA 94404 CL Navy Carrier/Perry Continued page 62 closely control exhaust-gas leakage slide closed interior exhaust stack should slotted receive slide An alternative installing slide exhaust stack construct track slide can bolted exhaust stack using fittings provided attaching muffler plan describe such installation next column Rear-exhaust engines present different prob lem installing exhaust restrictor Because Continued page 162 160 Model Aviation R/c pI4GAZINE IVDEy 198fl I986 At-i INFO CONSTRUCTION REVIEWS HOW TOSc Six Maior Modeling MCgaZIOCS 9 2 Sfld 000K 0 MO Connectors Designed anything electrical requiring quick disconnects