Control Line RA CING Bill Lee PERENNIAL PROBLEM get specialty equipment need fly competi tive racing Since local hobby shops dont understand model airplanes meant fly wires let alone race shouldnt expect carry little things need So great deal pleasure recently got letter product list new source Dick Tyndall Highland Springs VA Dick has few out occasionally send picture two find Out producing some specialty items especially pleasing Listed Tyndalls price sheet number items racing lists venturis Rossi 15 allow larger size hole what get stock venturi normal size sells 312 will make larger smaller demand height venturi listed again Rossi head inserts double-bubble combustion chamber 30 taper squish band Dick cuts inserts long-reach plug 102 insert depth yields 002-003 head clearance Since probably little tight head shims required set clearance desire course Dick has shims available too Another item available Hot Thumb pitting consists piece plastic pair battery contacts attached copper band mounted unit can worn left thumb contacts arranged can grasp top engine thumb holding model pitting plug instantly connected battery Dick sent sample of abovementioned items cant express strongly enough first class quality evidenced Work manship first order recommend send SASE Virginia Craftsman Inc 348 Argyll Circle Highland Springs VA 23075 ask Dick send price list items whole bunch couple t4A Mousers available plan form Jim Ong 8639 Ridgemont Pineville LA 71360 designs Jim sons Tim Rob have used successfully local contests Nats Seguin last year will note drawings flying wing designs Jim seems feel little faster conventional models copying measurement suc cess designs must good seems nearly everyone flying Mouse area onto Jims planes Recently read item specialty newsletters claimed some fantastic gains could made ability o venturi/needle valve draw placing hole side needle valve body particular position relative throat venturi Since some racing events require suction fuel systems decided would see could duplicate numbers given Well couldnt Upon investiga tion talk author item learned numbers printed correct some gain could much order measure effect two test items needed reliable source suction draw air through venturi means accurate ly measuring draw created needle valve first item provided piece rubber hose about 325 id venturi inserted attached shop vacuum portion air inlet shop vac through rubber hose order measure draw needle valve venturi rigged up water manometer simple device high school physics class can explain made length large diameter polyethelene tubing bought hardware store suppose piece fuel line would also work tubing about four ft long mounted board shape U filled tubing about half-full water noted level water same both sides U connected piece fuel line top legs U ran needle valve inlet As drew air through venturi shop vac water attached leg manometer rose certain amount setup can measure effects such things venturi size shape doing effect hole needle valve relation Continued page 126 60 Model Aviation new Rossi L AD 15 Both appearto same size old Rossi new Rossi has different mounting dimensions Virginia Craftsman Dick Tyndall makes ruu1 nurnu ior quic pit stops see text venturi insert also sold Tyndall System Hi-Starts 101 Ceesplwa H- State Kit 15 Mm Aaeebly 14 Pound Pull 100 Feel Black Surgtcal Latex Continuous Piece section Reel Line Chute Stake Tow Rings Flacdwale etcS2400 102 Ceesplata 2Mw Hi-Stan Kit Pound Pull 50 Feet 14 itch Blank Latet Reel Line Chute Stake Ralowate Etc$1700 103 Raplaxeseant Tubing Opet Clue Type 100 Feet Black Sulgical Lutes 14 iS Puli $1600 104 Raplaxeeteet Tabieg 2-Mesa BIb Pull$ 900 105 Nylee Hi-Seen LineTwisteoS 325 55 lx Text White ColorBtadeO $425 106 Steedard Parachute Red Celo Tow Rieg$ 326 109 Reel Kita Fur Hi-Stuns Oujob Wiud-UpLOIRe S 500 Cuwplate Tough Plaatix Wet HdwraStno S 450 System II Winch 111 Pro- Lucnxh Cuetest Witch MIg bn Keen Edge St ate oIl cnmgletnly Oady-IO-use leon hallnnyl 12 unit gonabie w ncn includes wheels handle mdci Inut sw Inn eel Ilinalun Cd eieuliinal wit ng line uhuln Honr-ic nattely end gnu readn hg $29900 $15000 S 625 $1600 $2000 $2600 $3200 112 Pro-Lautch Witch Feaste RaeL Tuetenound nuludes Willed lanle eel luinainind N gunk 107 Witch Chute 16 Itoh Diaseetee 230 lb Teat Heang DuIn Tow Ring Connentng Ring 106 Witub Lies 2000 ft Becidad Nylee 93 lb Tess Choich Full Test White Cold 11$ 5 Text Top Quality Auaiiahle Seecal 153 Ic Tool Otduts Othel Listed 1 hO lb TetI System Ill Power Pod 110 Puwee Pud dasigead Ed Counright Id 2 melel sailganes heiglass ath ca It-n enlla lank allows 1gm n engine Inn tnt ate wIn 049 metal lank enSines$1200 RLF PRODUCTS 812 723-4310 R3 Box 178 Puola IN 47454 THE PEANUT-PEOPLE PRESENT PEANUT SCALE MODELS MUSTANG MILES M-l8ZERO DRUINEPIETENPOL COUGARPIPER CUB GIPSY MOTHANDRESON GANAGOBIELACEY M-t0 Rubber Powered Balsa Tissue Kits $595 SPORT MODELS PRAIRIE BIRD KIT $595 BABY ACE$949 ONE NITE 28$995 ONE NITE 16$595 STRINGLESS WONDER$495 PECK ROG$195 RUBBER OR CO-2 POWERED BUILDING NEEDS 0 PROPS TISSUE RUBBER WINDERS BLADE SIIARPENERS BEARINGS PROP SHAFTS LUBE WASHERS WHEELS FUSE CO-2 MOTORS BOOKS PLANS MORE ADVENTURE MODELS KIT $24900 COMPLETE CATALOG $100 HARD TO FIND ITEMS FOR RUBBER MODELS AND AIRSHIPS PeckaPelymers P 0 BOX 2498-MA LA MESA CALIF 92041 PHONE 714 409-8075 714 2-4636 DEALER/DIRECT INQUIRIES INVITED Full Command Systems Propellers sizes stom-made Propellers6aa8a including homebuiltsultralights or Mounts l Tanks. Quarter Scale Servos. Imported Servos 3 wire $998. Servo Reversers. Glow Plugs. Glow Drivers. Hardware Accessories. Sailplane Accessoriesincluding 100% guaranteed Tow Hook. R/C Devices. Radios. Ready-To-Fly AirplanesTrainer thru Pattern drich Control Line Panels. Expanded Scale Voltmeters48 96 Tachometers LCD stors Dopes OOmah Quarter Scale Batteries Motors Racing ix Boats. Custom Injection Molding. Custom Toolroom Work MUCH MORE. Look Future Kit RadiosS 7995 Full Command Systems 9O8ER osewood Spokane WA 99207 in. 509 487-2122 Hoffelt Group also has some filament control line one-fourth weight braided steel lines supposed much stronger Im sure saying Ill bet lines proved light promised didnt break kink cause problems weight savings tip weight overall line weight means quicker acceleration better tracking through turns drawback seems small amount drag cost around $12 per set Something revolutionary will need lot testing before its ready high zoot market possibly Stunt will benefit Combat smallest diameter 018 dont get excited about using FAI Combat Remember few years ago everyone hot-shot motor sent Nats engines run airplane Some original instigators up againit sounds like great after-hours activity Hopefully details next column Charlie Johnson 3716 Ingraham SL San Diego CA 92109 CL Racing/Lee Continued page 60 throat venturi testing clamped venturi using K&B venturi vise bench could rotate body needle valve shop vac running rotating body could watch suction being created needle valve watching level water manometer rise fall got some interesting results hole body pointed straight downstream observed vacuum manometer As rotated body through about 90d found draw needle valve changed very littleas long hole body anywhere downstream perpendicular venturi throat rotated body hole right 900 air flow found very small area venturi action hole needle valve increased strongly Using K&B venturi 375 throat K&B universal needle valve assembly found increase draw 136% tried K&B venturi 345 throat same needle valve assembly found 162% increase Now what does mean events require suction system might mean difference between being able draw fuel through given venturi might mean being able use larger venturi power case advantage used go about getting advantage believe will have setting needle valve body position venturi same way did testing found additional draw appeared very small rotational angle doubt anybody would able hit free hand Once get needle valve body venturi rotated point maximum draw should tighten down good recheck position leave alone installed engine should getting maximum draw venturi capable produc ing other item found interesting comparison draw 375 vs 345 venturi believe venturi shape same since both factory stock units certainly look same eye 345 venturi has 29% smaller effective crosssectional area K&B needle valve 126 Model Aviation PRC LRUflCH EMS Rugged Simplicity Top Performance Reasonable Price OeeutSaleo Na Middle Mee/ft-StaetaAne KilFunm 19 Minute Anoemhlnl lete lnatnuutuno Included No SgecaI Tunlo Raguiled Send SANE Fur Fudhee Intenmatiun Te Ordee Lisa peuducts atd Total / Add $200 Shipsxie9 / Seed MueaoOedee Check OeCeeditCaedNuetbeeaudEuls Date/COO Add 5150 / Alaska Add $350 / Hawaii Will COO Shippieg / Mail ur Phuta / Witch OtdeesPagtteat Adnueca Will COD Shippieg / Phute Ordars Welcuwa / Mail Order K e Orders Welcome 375 venturi difference drawing ability nearly 45% hadnt made test read answers myself would never have guessed would much increase Learn something new day next effort will try evaluate some venturi shapes anybody out has some pet ideas theory hat would like share let know well give em try Bill Lee 3522 Tamarisk Lane Missouri City TX 77459 Time/Lindley-Stoy Continued page 63 pawi Keep heat wire bury plastic neat strong mechanical joint will result Check clearance arm over star wheel ball cavity Bend required remaining operation gear train removal two ears winding ratchet retained spring cut off flush bottom slot through winding shaft runs using slot bottom guide Carefully reassemble gear train slip intermediate deck place hold everything position problem now bearing hole through winding shaft runs has too much slop solve problem use part original top plate bearing original case snap-retained design drill through alignment pin holes top shell #61 039 drill Cut away skirt around top shell leavingonly 1/32-in thick top Score top razor about 1/16-in beyond winding shaft hole Break off scored line Cut off projections inter mediate deck associated reten tion power spring Leave parts bottom deck serve align deck bottom shell Reassemble intermediate deck bottom shell gear train taking last look see everything positioned properly should last look sure chips shavings gone Slip short piece original top shell have cut down coupon-shaped slab over winding shaft line up alignment pins Push down flush inter mediate deck Hand-twist winding shaft holding case closed make sure everything runs smoothly fingers arent interfering pawl squeezing too tight unit should buzz away offering good resistance high torque because increased inertia pawl Check winding shaft make sure has about 010 end play housing critical end play does exist add paper shims between deck bearing plate until proper play achieved everything looks right cut off alignment pins and/or snaps flush top surface weld remaining stubs deck soldering iron Check unit again have go back point can carefully cut welds snap clips pop welds alignment pins wedging razor slot last chance Get right time everything OK use iron tack-weld intermediate deck bottom shell bearing plate complete timing assembly bearing plate must welded around its whole outside edge piece takes entire force rubberband Cut 5/16-in dia disc 1/64 plywood drill 3/32-in hole middle Insert Continued page 130 Iteut Pwdud Pressurizer al Pressure Without Pump 4 z z 5 LIFETIMEGUARANTEEAGAINST FAILURE DUE TO MANUFACTURING DEFECTS *CALIF RESIDENTS ADD 60/0 TAX * No fuel pump special carburetor needed * Works planes boats cars helicop ters..2 stroke engines Irom 10 90 muffler pipe * No adjustments necessary except simple carburetor adjustments * Extends engine life helping prevent lean engine runs INUCTORY OFFER $1695* PLUS $1 OD FOR SHIPPING $1995 after July 15th SEND CHECK OR MONEY ORDER ro VISTAEDS MODEL PRODUCTS AHERMOSA WALNUT CREEK CA 94596 OR 4830 ZUBE CT CARMICHAEL CA 95608 June 1982 127 RIC PILOT LOGBOOK AND FLIGHT RECORD *AIRCRAFT FLOWN *FLyING FIELDS *FLIGHT INSTRUCTOR *TOTAL HOURS *WEATHER CONDITIONS *FLIGHT DURATION *TRIM ADJUSTMENTS above can entered own personal flight log first time R/G LOGBOOK designed specifically pilot minitiature aircraft Whatever particular skill level may LOGBOOK will add enjoyment R/G flying LOGBOOK has durable hard-bound cover contains sufficient pages record years flying average R/G pilotel 81 Champion Hobbies$695 Postage Paid Dealer/Distributor inquiries welcomeOhio esidents odd 320 sIes tool CHAMPION HOBBIES 3715 Reemelin Cincinnati 01-145211 513 481-6961 ACTUAL SIZE 1/4 INCH LONG
Edition: Model Aviation - 1982/06
Page Numbers: 60, 126, 127
Edition: Model Aviation - 1982/06
Page Numbers: 60, 126, 127
Control Line RA CING Bill Lee PERENNIAL PROBLEM get specialty equipment need fly competi tive racing Since local hobby shops dont understand model airplanes meant fly wires let alone race shouldnt expect carry little things need So great deal pleasure recently got letter product list new source Dick Tyndall Highland Springs VA Dick has few out occasionally send picture two find Out producing some specialty items especially pleasing Listed Tyndalls price sheet number items racing lists venturis Rossi 15 allow larger size hole what get stock venturi normal size sells 312 will make larger smaller demand height venturi listed again Rossi head inserts double-bubble combustion chamber 30 taper squish band Dick cuts inserts long-reach plug 102 insert depth yields 002-003 head clearance Since probably little tight head shims required set clearance desire course Dick has shims available too Another item available Hot Thumb pitting consists piece plastic pair battery contacts attached copper band mounted unit can worn left thumb contacts arranged can grasp top engine thumb holding model pitting plug instantly connected battery Dick sent sample of abovementioned items cant express strongly enough first class quality evidenced Work manship first order recommend send SASE Virginia Craftsman Inc 348 Argyll Circle Highland Springs VA 23075 ask Dick send price list items whole bunch couple t4A Mousers available plan form Jim Ong 8639 Ridgemont Pineville LA 71360 designs Jim sons Tim Rob have used successfully local contests Nats Seguin last year will note drawings flying wing designs Jim seems feel little faster conventional models copying measurement suc cess designs must good seems nearly everyone flying Mouse area onto Jims planes Recently read item specialty newsletters claimed some fantastic gains could made ability o venturi/needle valve draw placing hole side needle valve body particular position relative throat venturi Since some racing events require suction fuel systems decided would see could duplicate numbers given Well couldnt Upon investiga tion talk author item learned numbers printed correct some gain could much order measure effect two test items needed reliable source suction draw air through venturi means accurate ly measuring draw created needle valve first item provided piece rubber hose about 325 id venturi inserted attached shop vacuum portion air inlet shop vac through rubber hose order measure draw needle valve venturi rigged up water manometer simple device high school physics class can explain made length large diameter polyethelene tubing bought hardware store suppose piece fuel line would also work tubing about four ft long mounted board shape U filled tubing about half-full water noted level water same both sides U connected piece fuel line top legs U ran needle valve inlet As drew air through venturi shop vac water attached leg manometer rose certain amount setup can measure effects such things venturi size shape doing effect hole needle valve relation Continued page 126 60 Model Aviation new Rossi L AD 15 Both appearto same size old Rossi new Rossi has different mounting dimensions Virginia Craftsman Dick Tyndall makes ruu1 nurnu ior quic pit stops see text venturi insert also sold Tyndall System Hi-Starts 101 Ceesplwa H- State Kit 15 Mm Aaeebly 14 Pound Pull 100 Feel Black Surgtcal Latex Continuous Piece section Reel Line Chute Stake Tow Rings Flacdwale etcS2400 102 Ceesplata 2Mw Hi-Stan Kit Pound Pull 50 Feet 14 itch Blank Latet Reel Line Chute Stake Ralowate Etc$1700 103 Raplaxeseant Tubing Opet Clue Type 100 Feet Black Sulgical Lutes 14 iS Puli $1600 104 Raplaxeeteet Tabieg 2-Mesa BIb Pull$ 900 105 Nylee Hi-Seen LineTwisteoS 325 55 lx Text White ColorBtadeO $425 106 Steedard Parachute Red Celo Tow Rieg$ 326 109 Reel Kita Fur Hi-Stuns Oujob Wiud-UpLOIRe S 500 Cuwplate Tough Plaatix Wet HdwraStno S 450 System II Winch 111 Pro- Lucnxh Cuetest Witch MIg bn Keen Edge St ate oIl cnmgletnly Oady-IO-use leon hallnnyl 12 unit gonabie w ncn includes wheels handle mdci Inut sw Inn eel Ilinalun Cd eieuliinal wit ng line uhuln Honr-ic nattely end gnu readn hg $29900 $15000 S 625 $1600 $2000 $2600 $3200 112 Pro-Lautch Witch Feaste RaeL Tuetenound nuludes Willed lanle eel luinainind N gunk 107 Witch Chute 16 Itoh Diaseetee 230 lb Teat Heang DuIn Tow Ring Connentng Ring 106 Witub Lies 2000 ft Becidad Nylee 93 lb Tess Choich Full Test White Cold 11$ 5 Text Top Quality Auaiiahle Seecal 153 Ic Tool Otduts Othel Listed 1 hO lb TetI System Ill Power Pod 110 Puwee Pud dasigead Ed Counright Id 2 melel sailganes heiglass ath ca It-n enlla lank allows 1gm n engine Inn tnt ate wIn 049 metal lank enSines$1200 RLF PRODUCTS 812 723-4310 R3 Box 178 Puola IN 47454 THE PEANUT-PEOPLE PRESENT PEANUT SCALE MODELS MUSTANG MILES M-l8ZERO DRUINEPIETENPOL COUGARPIPER CUB GIPSY MOTHANDRESON GANAGOBIELACEY M-t0 Rubber Powered Balsa Tissue Kits $595 SPORT MODELS PRAIRIE BIRD KIT $595 BABY ACE$949 ONE NITE 28$995 ONE NITE 16$595 STRINGLESS WONDER$495 PECK ROG$195 RUBBER OR CO-2 POWERED BUILDING NEEDS 0 PROPS TISSUE RUBBER WINDERS BLADE SIIARPENERS BEARINGS PROP SHAFTS LUBE WASHERS WHEELS FUSE CO-2 MOTORS BOOKS PLANS MORE ADVENTURE MODELS KIT $24900 COMPLETE CATALOG $100 HARD TO FIND ITEMS FOR RUBBER MODELS AND AIRSHIPS PeckaPelymers P 0 BOX 2498-MA LA MESA CALIF 92041 PHONE 714 409-8075 714 2-4636 DEALER/DIRECT INQUIRIES INVITED Full Command Systems Propellers sizes stom-made Propellers6aa8a including homebuiltsultralights or Mounts l Tanks. Quarter Scale Servos. Imported Servos 3 wire $998. Servo Reversers. Glow Plugs. Glow Drivers. Hardware Accessories. Sailplane Accessoriesincluding 100% guaranteed Tow Hook. R/C Devices. Radios. Ready-To-Fly AirplanesTrainer thru Pattern drich Control Line Panels. Expanded Scale Voltmeters48 96 Tachometers LCD stors Dopes OOmah Quarter Scale Batteries Motors Racing ix Boats. Custom Injection Molding. Custom Toolroom Work MUCH MORE. Look Future Kit RadiosS 7995 Full Command Systems 9O8ER osewood Spokane WA 99207 in. 509 487-2122 Hoffelt Group also has some filament control line one-fourth weight braided steel lines supposed much stronger Im sure saying Ill bet lines proved light promised didnt break kink cause problems weight savings tip weight overall line weight means quicker acceleration better tracking through turns drawback seems small amount drag cost around $12 per set Something revolutionary will need lot testing before its ready high zoot market possibly Stunt will benefit Combat smallest diameter 018 dont get excited about using FAI Combat Remember few years ago everyone hot-shot motor sent Nats engines run airplane Some original instigators up againit sounds like great after-hours activity Hopefully details next column Charlie Johnson 3716 Ingraham SL San Diego CA 92109 CL Racing/Lee Continued page 60 throat venturi testing clamped venturi using K&B venturi vise bench could rotate body needle valve shop vac running rotating body could watch suction being created needle valve watching level water manometer rise fall got some interesting results hole body pointed straight downstream observed vacuum manometer As rotated body through about 90d found draw needle valve changed very littleas long hole body anywhere downstream perpendicular venturi throat rotated body hole right 900 air flow found very small area venturi action hole needle valve increased strongly Using K&B venturi 375 throat K&B universal needle valve assembly found increase draw 136% tried K&B venturi 345 throat same needle valve assembly found 162% increase Now what does mean events require suction system might mean difference between being able draw fuel through given venturi might mean being able use larger venturi power case advantage used go about getting advantage believe will have setting needle valve body position venturi same way did testing found additional draw appeared very small rotational angle doubt anybody would able hit free hand Once get needle valve body venturi rotated point maximum draw should tighten down good recheck position leave alone installed engine should getting maximum draw venturi capable produc ing other item found interesting comparison draw 375 vs 345 venturi believe venturi shape same since both factory stock units certainly look same eye 345 venturi has 29% smaller effective crosssectional area K&B needle valve 126 Model Aviation PRC LRUflCH EMS Rugged Simplicity Top Performance Reasonable Price OeeutSaleo Na Middle Mee/ft-StaetaAne KilFunm 19 Minute Anoemhlnl lete lnatnuutuno Included No SgecaI Tunlo Raguiled Send SANE Fur Fudhee Intenmatiun Te Ordee Lisa peuducts atd Total / Add $200 Shipsxie9 / Seed MueaoOedee Check OeCeeditCaedNuetbeeaudEuls Date/COO Add 5150 / Alaska Add $350 / Hawaii Will COO Shippieg / Mail ur Phuta / Witch OtdeesPagtteat Adnueca Will COD Shippieg / Phute Ordars Welcuwa / Mail Order K e Orders Welcome 375 venturi difference drawing ability nearly 45% hadnt made test read answers myself would never have guessed would much increase Learn something new day next effort will try evaluate some venturi shapes anybody out has some pet ideas theory hat would like share let know well give em try Bill Lee 3522 Tamarisk Lane Missouri City TX 77459 Time/Lindley-Stoy Continued page 63 pawi Keep heat wire bury plastic neat strong mechanical joint will result Check clearance arm over star wheel ball cavity Bend required remaining operation gear train removal two ears winding ratchet retained spring cut off flush bottom slot through winding shaft runs using slot bottom guide Carefully reassemble gear train slip intermediate deck place hold everything position problem now bearing hole through winding shaft runs has too much slop solve problem use part original top plate bearing original case snap-retained design drill through alignment pin holes top shell #61 039 drill Cut away skirt around top shell leavingonly 1/32-in thick top Score top razor about 1/16-in beyond winding shaft hole Break off scored line Cut off projections inter mediate deck associated reten tion power spring Leave parts bottom deck serve align deck bottom shell Reassemble intermediate deck bottom shell gear train taking last look see everything positioned properly should last look sure chips shavings gone Slip short piece original top shell have cut down coupon-shaped slab over winding shaft line up alignment pins Push down flush inter mediate deck Hand-twist winding shaft holding case closed make sure everything runs smoothly fingers arent interfering pawl squeezing too tight unit should buzz away offering good resistance high torque because increased inertia pawl Check winding shaft make sure has about 010 end play housing critical end play does exist add paper shims between deck bearing plate until proper play achieved everything looks right cut off alignment pins and/or snaps flush top surface weld remaining stubs deck soldering iron Check unit again have go back point can carefully cut welds snap clips pop welds alignment pins wedging razor slot last chance Get right time everything OK use iron tack-weld intermediate deck bottom shell bearing plate complete timing assembly bearing plate must welded around its whole outside edge piece takes entire force rubberband Cut 5/16-in dia disc 1/64 plywood drill 3/32-in hole middle Insert Continued page 130 Iteut Pwdud Pressurizer al Pressure Without Pump 4 z z 5 LIFETIMEGUARANTEEAGAINST FAILURE DUE TO MANUFACTURING DEFECTS *CALIF RESIDENTS ADD 60/0 TAX * No fuel pump special carburetor needed * Works planes boats cars helicop ters..2 stroke engines Irom 10 90 muffler pipe * No adjustments necessary except simple carburetor adjustments * Extends engine life helping prevent lean engine runs INUCTORY OFFER $1695* PLUS $1 OD FOR SHIPPING $1995 after July 15th SEND CHECK OR MONEY ORDER ro VISTAEDS MODEL PRODUCTS AHERMOSA WALNUT CREEK CA 94596 OR 4830 ZUBE CT CARMICHAEL CA 95608 June 1982 127 RIC PILOT LOGBOOK AND FLIGHT RECORD *AIRCRAFT FLOWN *FLyING FIELDS *FLIGHT INSTRUCTOR *TOTAL HOURS *WEATHER CONDITIONS *FLIGHT DURATION *TRIM ADJUSTMENTS above can entered own personal flight log first time R/G LOGBOOK designed specifically pilot minitiature aircraft Whatever particular skill level may LOGBOOK will add enjoyment R/G flying LOGBOOK has durable hard-bound cover contains sufficient pages record years flying average R/G pilotel 81 Champion Hobbies$695 Postage Paid Dealer/Distributor inquiries welcomeOhio esidents odd 320 sIes tool CHAMPION HOBBIES 3715 Reemelin Cincinnati 01-145211 513 481-6961 ACTUAL SIZE 1/4 INCH LONG
Edition: Model Aviation - 1982/06
Page Numbers: 60, 126, 127
Control Line RA CING Bill Lee PERENNIAL PROBLEM get specialty equipment need fly competi tive racing Since local hobby shops dont understand model airplanes meant fly wires let alone race shouldnt expect carry little things need So great deal pleasure recently got letter product list new source Dick Tyndall Highland Springs VA Dick has few out occasionally send picture two find Out producing some specialty items especially pleasing Listed Tyndalls price sheet number items racing lists venturis Rossi 15 allow larger size hole what get stock venturi normal size sells 312 will make larger smaller demand height venturi listed again Rossi head inserts double-bubble combustion chamber 30 taper squish band Dick cuts inserts long-reach plug 102 insert depth yields 002-003 head clearance Since probably little tight head shims required set clearance desire course Dick has shims available too Another item available Hot Thumb pitting consists piece plastic pair battery contacts attached copper band mounted unit can worn left thumb contacts arranged can grasp top engine thumb holding model pitting plug instantly connected battery Dick sent sample of abovementioned items cant express strongly enough first class quality evidenced Work manship first order recommend send SASE Virginia Craftsman Inc 348 Argyll Circle Highland Springs VA 23075 ask Dick send price list items whole bunch couple t4A Mousers available plan form Jim Ong 8639 Ridgemont Pineville LA 71360 designs Jim sons Tim Rob have used successfully local contests Nats Seguin last year will note drawings flying wing designs Jim seems feel little faster conventional models copying measurement suc cess designs must good seems nearly everyone flying Mouse area onto Jims planes Recently read item specialty newsletters claimed some fantastic gains could made ability o venturi/needle valve draw placing hole side needle valve body particular position relative throat venturi Since some racing events require suction fuel systems decided would see could duplicate numbers given Well couldnt Upon investiga tion talk author item learned numbers printed correct some gain could much order measure effect two test items needed reliable source suction draw air through venturi means accurate ly measuring draw created needle valve first item provided piece rubber hose about 325 id venturi inserted attached shop vacuum portion air inlet shop vac through rubber hose order measure draw needle valve venturi rigged up water manometer simple device high school physics class can explain made length large diameter polyethelene tubing bought hardware store suppose piece fuel line would also work tubing about four ft long mounted board shape U filled tubing about half-full water noted level water same both sides U connected piece fuel line top legs U ran needle valve inlet As drew air through venturi shop vac water attached leg manometer rose certain amount setup can measure effects such things venturi size shape doing effect hole needle valve relation Continued page 126 60 Model Aviation new Rossi L AD 15 Both appearto same size old Rossi new Rossi has different mounting dimensions Virginia Craftsman Dick Tyndall makes ruu1 nurnu ior quic pit stops see text venturi insert also sold Tyndall System Hi-Starts 101 Ceesplwa H- State Kit 15 Mm Aaeebly 14 Pound Pull 100 Feel Black Surgtcal Latex Continuous Piece section Reel Line Chute Stake Tow Rings Flacdwale etcS2400 102 Ceesplata 2Mw Hi-Stan Kit Pound Pull 50 Feet 14 itch Blank Latet Reel Line Chute Stake Ralowate Etc$1700 103 Raplaxeseant Tubing Opet Clue Type 100 Feet Black Sulgical Lutes 14 iS Puli $1600 104 Raplaxeeteet Tabieg 2-Mesa BIb Pull$ 900 105 Nylee Hi-Seen LineTwisteoS 325 55 lx Text White ColorBtadeO $425 106 Steedard Parachute Red Celo Tow Rieg$ 326 109 Reel Kita Fur Hi-Stuns Oujob Wiud-UpLOIRe S 500 Cuwplate Tough Plaatix Wet HdwraStno S 450 System II Winch 111 Pro- Lucnxh Cuetest Witch MIg bn Keen Edge St ate oIl cnmgletnly Oady-IO-use leon hallnnyl 12 unit gonabie w ncn includes wheels handle mdci Inut sw Inn eel Ilinalun Cd eieuliinal wit ng line uhuln Honr-ic nattely end gnu readn hg $29900 $15000 S 625 $1600 $2000 $2600 $3200 112 Pro-Lautch Witch Feaste RaeL Tuetenound nuludes Willed lanle eel luinainind N gunk 107 Witch Chute 16 Itoh Diaseetee 230 lb Teat Heang DuIn Tow Ring Connentng Ring 106 Witub Lies 2000 ft Becidad Nylee 93 lb Tess Choich Full Test White Cold 11$ 5 Text Top Quality Auaiiahle Seecal 153 Ic Tool Otduts Othel Listed 1 hO lb TetI System Ill Power Pod 110 Puwee Pud dasigead Ed Counright Id 2 melel sailganes heiglass ath ca It-n enlla lank allows 1gm n engine Inn tnt ate wIn 049 metal lank enSines$1200 RLF PRODUCTS 812 723-4310 R3 Box 178 Puola IN 47454 THE PEANUT-PEOPLE PRESENT PEANUT SCALE MODELS MUSTANG MILES M-l8ZERO DRUINEPIETENPOL COUGARPIPER CUB GIPSY MOTHANDRESON GANAGOBIELACEY M-t0 Rubber Powered Balsa Tissue Kits $595 SPORT MODELS PRAIRIE BIRD KIT $595 BABY ACE$949 ONE NITE 28$995 ONE NITE 16$595 STRINGLESS WONDER$495 PECK ROG$195 RUBBER OR CO-2 POWERED BUILDING NEEDS 0 PROPS TISSUE RUBBER WINDERS BLADE SIIARPENERS BEARINGS PROP SHAFTS LUBE WASHERS WHEELS FUSE CO-2 MOTORS BOOKS PLANS MORE ADVENTURE MODELS KIT $24900 COMPLETE CATALOG $100 HARD TO FIND ITEMS FOR RUBBER MODELS AND AIRSHIPS PeckaPelymers P 0 BOX 2498-MA LA MESA CALIF 92041 PHONE 714 409-8075 714 2-4636 DEALER/DIRECT INQUIRIES INVITED Full Command Systems Propellers sizes stom-made Propellers6aa8a including homebuiltsultralights or Mounts l Tanks. Quarter Scale Servos. Imported Servos 3 wire $998. Servo Reversers. Glow Plugs. Glow Drivers. Hardware Accessories. Sailplane Accessoriesincluding 100% guaranteed Tow Hook. R/C Devices. Radios. Ready-To-Fly AirplanesTrainer thru Pattern drich Control Line Panels. Expanded Scale Voltmeters48 96 Tachometers LCD stors Dopes OOmah Quarter Scale Batteries Motors Racing ix Boats. Custom Injection Molding. Custom Toolroom Work MUCH MORE. Look Future Kit RadiosS 7995 Full Command Systems 9O8ER osewood Spokane WA 99207 in. 509 487-2122 Hoffelt Group also has some filament control line one-fourth weight braided steel lines supposed much stronger Im sure saying Ill bet lines proved light promised didnt break kink cause problems weight savings tip weight overall line weight means quicker acceleration better tracking through turns drawback seems small amount drag cost around $12 per set Something revolutionary will need lot testing before its ready high zoot market possibly Stunt will benefit Combat smallest diameter 018 dont get excited about using FAI Combat Remember few years ago everyone hot-shot motor sent Nats engines run airplane Some original instigators up againit sounds like great after-hours activity Hopefully details next column Charlie Johnson 3716 Ingraham SL San Diego CA 92109 CL Racing/Lee Continued page 60 throat venturi testing clamped venturi using K&B venturi vise bench could rotate body needle valve shop vac running rotating body could watch suction being created needle valve watching level water manometer rise fall got some interesting results hole body pointed straight downstream observed vacuum manometer As rotated body through about 90d found draw needle valve changed very littleas long hole body anywhere downstream perpendicular venturi throat rotated body hole right 900 air flow found very small area venturi action hole needle valve increased strongly Using K&B venturi 375 throat K&B universal needle valve assembly found increase draw 136% tried K&B venturi 345 throat same needle valve assembly found 162% increase Now what does mean events require suction system might mean difference between being able draw fuel through given venturi might mean being able use larger venturi power case advantage used go about getting advantage believe will have setting needle valve body position venturi same way did testing found additional draw appeared very small rotational angle doubt anybody would able hit free hand Once get needle valve body venturi rotated point maximum draw should tighten down good recheck position leave alone installed engine should getting maximum draw venturi capable produc ing other item found interesting comparison draw 375 vs 345 venturi believe venturi shape same since both factory stock units certainly look same eye 345 venturi has 29% smaller effective crosssectional area K&B needle valve 126 Model Aviation PRC LRUflCH EMS Rugged Simplicity Top Performance Reasonable Price OeeutSaleo Na Middle Mee/ft-StaetaAne KilFunm 19 Minute Anoemhlnl lete lnatnuutuno Included No SgecaI Tunlo Raguiled Send SANE Fur Fudhee Intenmatiun Te Ordee Lisa peuducts atd Total / Add $200 Shipsxie9 / Seed MueaoOedee Check OeCeeditCaedNuetbeeaudEuls Date/COO Add 5150 / Alaska Add $350 / Hawaii Will COO Shippieg / Mail ur Phuta / Witch OtdeesPagtteat Adnueca Will COD Shippieg / Phute Ordars Welcuwa / Mail Order K e Orders Welcome 375 venturi difference drawing ability nearly 45% hadnt made test read answers myself would never have guessed would much increase Learn something new day next effort will try evaluate some venturi shapes anybody out has some pet ideas theory hat would like share let know well give em try Bill Lee 3522 Tamarisk Lane Missouri City TX 77459 Time/Lindley-Stoy Continued page 63 pawi Keep heat wire bury plastic neat strong mechanical joint will result Check clearance arm over star wheel ball cavity Bend required remaining operation gear train removal two ears winding ratchet retained spring cut off flush bottom slot through winding shaft runs using slot bottom guide Carefully reassemble gear train slip intermediate deck place hold everything position problem now bearing hole through winding shaft runs has too much slop solve problem use part original top plate bearing original case snap-retained design drill through alignment pin holes top shell #61 039 drill Cut away skirt around top shell leavingonly 1/32-in thick top Score top razor about 1/16-in beyond winding shaft hole Break off scored line Cut off projections inter mediate deck associated reten tion power spring Leave parts bottom deck serve align deck bottom shell Reassemble intermediate deck bottom shell gear train taking last look see everything positioned properly should last look sure chips shavings gone Slip short piece original top shell have cut down coupon-shaped slab over winding shaft line up alignment pins Push down flush inter mediate deck Hand-twist winding shaft holding case closed make sure everything runs smoothly fingers arent interfering pawl squeezing too tight unit should buzz away offering good resistance high torque because increased inertia pawl Check winding shaft make sure has about 010 end play housing critical end play does exist add paper shims between deck bearing plate until proper play achieved everything looks right cut off alignment pins and/or snaps flush top surface weld remaining stubs deck soldering iron Check unit again have go back point can carefully cut welds snap clips pop welds alignment pins wedging razor slot last chance Get right time everything OK use iron tack-weld intermediate deck bottom shell bearing plate complete timing assembly bearing plate must welded around its whole outside edge piece takes entire force rubberband Cut 5/16-in dia disc 1/64 plywood drill 3/32-in hole middle Insert Continued page 130 Iteut Pwdud Pressurizer al Pressure Without Pump 4 z z 5 LIFETIMEGUARANTEEAGAINST FAILURE DUE TO MANUFACTURING DEFECTS *CALIF RESIDENTS ADD 60/0 TAX * No fuel pump special carburetor needed * Works planes boats cars helicop ters..2 stroke engines Irom 10 90 muffler pipe * No adjustments necessary except simple carburetor adjustments * Extends engine life helping prevent lean engine runs INUCTORY OFFER $1695* PLUS $1 OD FOR SHIPPING $1995 after July 15th SEND CHECK OR MONEY ORDER ro VISTAEDS MODEL PRODUCTS AHERMOSA WALNUT CREEK CA 94596 OR 4830 ZUBE CT CARMICHAEL CA 95608 June 1982 127 RIC PILOT LOGBOOK AND FLIGHT RECORD *AIRCRAFT FLOWN *FLyING FIELDS *FLIGHT INSTRUCTOR *TOTAL HOURS *WEATHER CONDITIONS *FLIGHT DURATION *TRIM ADJUSTMENTS above can entered own personal flight log first time R/G LOGBOOK designed specifically pilot minitiature aircraft Whatever particular skill level may LOGBOOK will add enjoyment R/G flying LOGBOOK has durable hard-bound cover contains sufficient pages record years flying average R/G pilotel 81 Champion Hobbies$695 Postage Paid Dealer/Distributor inquiries welcomeOhio esidents odd 320 sIes tool CHAMPION HOBBIES 3715 Reemelin Cincinnati 01-145211 513 481-6961 ACTUAL SIZE 1/4 INCH LONG
