GOOD NEWS/BAD NEWS has con firmed 1990 Indoor Nats will held good site Johnson City TN conjunction 1990 NFFS Indoor Championships bad news Indoor fliers have major Class AAAA contest 1990 instead two New addresses Bill Hannans Runway has relo cated Box 860 Magalia CA 95954 Send him order postcard remain revised mailing list hadnt noticed Lew Gitlows Indoor Model Supply has Box 5311 Salem OR 97304 tel 1-503/370-6350 some time Prop pamphlet Jim Jones has written brief piece jug props available send SASE $1 0 36631 Ledgestone Mt Clem ens MI 48043 includes step-by-step assem bly discussion some design information Winding review Its some time since have reviewed rhe basic process winding door motors have almost perfect match between motor prop wont well competition proper winding tech niques same applies rubber Regardless best available wont able make best use unless properly wound basic tools takes torque meter geared winder properly wind rubber motors Indoor helps have winder low friction can feel pressure motor small cross section Typical gear ra tios Indoor vinders 101 161 201 101 favorite fliers heavier motors such Pennyplane Torque meters available commercially some fliers build own photos shows very popular torque meter design Ce zar Banks plans unit have appeared nu merous club newsletters Neither commercial nor home-built torque ters can depended upon read correctly un less calibrate known standard torque meter calibrated major con sequence cant directly compare notes other fliers However use same torque meter flights relative torque readings uncalibrated torque ter perfectly useful competition exper imentation Calibrating torque meters want cali brate torque meter usable door start acquiring weight precisely 01 oz Make balanced beam 20 long one-inch increments marked along side shown Figure 1 Center beam torque meter hook apply specific torque calibrated weight Attach beam torque meter centered hook Mount torque meter centerline horizontal beam level Mark zero point scale Hang 01oz weight inch hook rotate torque meter beam level again Mark 0 l-in-oz point scale Repeat point scale moving weight successive inch marks beam higher torque range make longer beam use heavier calibration weight Torque wire selection Charlie Sotich computed force vs twist music wire producing data shown table below Note wire overstressed torque scale will linear torque meter does return zero after hard usage wire has overstressed WireWireTorque in-oz diameterlength3600 rotation ininat max torque 0019 0021 002 3 0025 0027 716 792 867 942 1018 2155 2909 3822 4909 6184 Note preliminary full-scale calibration can made new torque meter adjusting length torque wire Select wire 00134900690 00155651060 00176411543Continued page 170 February 1990 63 Free Flight Indoor Bud Tenny Box 545 Richardson TX 75080 Cezar Banks torque meter plans have printed club newsletters model retrieval gadget seen Johnson City beam has hook end steering line attaches other end balloon strong lift gives stable platform Close cooperation between bal loon man someone holding steering string enables hook end beam slide under model lift off beam No-Cal model built Robert Furr Omaha NE plans Aeromodeler Actually plan British Firecracker turboprop presented round-the-pole Electric mod el Robert used McDonalds food-trays 12-in motor stick 6-in prop craft ship LANDER INDUST 1005 19TH ST CT HAVRE MONTANA 59501 406265-6529 BUILDING BOARD 24x72 5ncf 24 X 48 895 mci fri CANADIAN ORDERS ADD 25/o Build straight spending fortune durable high density 1/2' pin surface bonded 3/4 laminated warp free base straight true work surface will last years years SMALL R/C HOBBY DEALERSIIE WE ARE DISTRIBUTOR KEYED TO YOUR PARTICULAR NEEDS information write call Southern Hobby Distributors 256 Madison Blvd Madison TN 37115 615 868-2100 1030 AM 500 PM CST it too late say have Happy New Year FF Indoor/Tenny Continued page 63 full-scale torque ranges greater desired full-scale value adjust length suit desired rotation example Required one ineh-ounce l80 rotation Us ing 0017-dia wire 180/360 x 1543 in-oz l80 1/07715 x 641 Note torque meter has significant margin prevent overstress expense length Using 0015-dia wire 2825-in-long torque wire would give approximately inchounce 1800 rotation very little stress margin Winding theory As rubber motor wound torque will build slowly first more rapidly rubber approaches breaking point Experience will enable feel winding peak torque important rate buildup torque begins build rapidly reduce stretch slowly keep winding practice can keep piling turns holding torque about same Step-by-step winding Before winding mo tor sure properly lubricated motor has used before examine closely evi dence tearing scuffing Mechanically dam aged rubber should used contest flying should fully wound flying sitAFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In uation youre short rubber use dam aged motors test flying discussion sumes using 0-rings preserve torque values after winding I Stretch motor four six times its nor mal length 2 Wind slowly steadily watching torque meter torque level starts rise rapidly few additional turns stop winding 3 Hold motor massage knots watching torque level drop torque stabilized resume winding 4 Wind very slowly reduce stretch Try hold torque regular level re ducing stretch distancc between hooks model 5 Massage knots again helping torque relax stable level torque stabi lizes again turn back prop small incre ments until stabilized required launch torque 6 Hook motor model fly 7 After model flying record launch turns launch torque low ceilings also record time until first ceiling contact 8 After model lands stop prop un winding hook motor torque meter again Record landing torque count out turns left 9 Compute turns used divide flight time seconds Multiply 60 get rpm Record flight time landing torque rpm average What numbers mean given model weight prop/model combination can de duce optimum trim level flight torque same landing torque eval Continued page 173 TEAM INC BOX 338M BRADYVILLE TN 37026 16151 765-5397 170 Model Aviation durable skis made lightweight aluminum feature steel spring holds ski rigid flight also elevates axle above ski no modifications cur rent gear wire needed can go wheels skis seconds side ski also has special edge allows excellent tracking icy surfaces available two sizes can purchased trikes just mains order please send check money order $300 shipping handling Add 6% sales tax Minnesota Allow 2 weeks delivery Telephone inquiries call Ron 612-781-7333 NORTHERN 20 30 Trike $2200 Mains $1600 MODELING 40 60 Trike $2400 Mains $1800 PRODUCTSPrices effective January 11990 PO Box 21181 ColumbIa HeIghts MN 55421 781-7333 wing rubberbands peck S//ver-Streak 035 ELECTRIC MOTOR SUPER LIGHT WEIGHT ONLY 26 OZ USES LESS CURRENT TURNS 6-3 PROP 12000 RPM 65 AMPS IDEAL FOR SMALL RIC & FREE FLIGHT MOTOR ONLY $1995 CATALOG #30 O PHONE6 19 448-1818 PeckPoIpmers BOX 2498-MA ESA CA 92044 Computer Designed3 Axis Control * Part 103 UltralightEasy Construction * Wood Construction Card # Exp date City State Zip Include poatage handling U S $150 Canadian foreign add 15% minimum $300 Make payment U 5 funda Wiaconain reaidenta add 5% aalea tax 0110 uate level flight torque launch model just enough torque climb slightly should climb out reach stops climbing catch measure level flight torque other data Number remaining turnsshould less 10% launch turns Use shorter heavier loop same sveight reduce number turns remaining Average rpmsome interaction landing torque general lowest average rpm im plies best trim efficient operation no-touch flight uses 85% launch turns optimum trim demon strated lowest average rpm lowest landing torque Note overelevated models may have tendency mush down landing higher torque Cat Howard Haupt 3860 Ec ochee Ave. San Diego CA 92117 Cottitecticut Glastonburv Indoor flying Glastonbury High School first Sunday month through April 1990 except 2nd Sunday March Jerry Bockius 48 Di vision St. Norwich CT 06360 Florida Next time follow-up showing relationship torque turns rpm flight timeplus what ever else will fit Flying opportunities following listings have updated whenever possible Attention CDs Events late March 90 can listed next time calzft.rnia Santa Ana Santa Ana han gar being refurbished availability will limited uncertain first weekend month will sanctioned just case contact Curt Ste veris 25108 Marguerite Park way Mission Viejo CA 92692 phone 1-714/240-8433 about particular session ~alifrrnia Sat Diego Monthly sessions Iowa Miami Dr John Martin 2180 Tigertail Ave Miami FL 33133 phone 1-305/858-6363 following sessions have scheduled MIAMA Indoor Meet #4 Feb 17-18 1990 Cat II Coast Guard Hangar Meet #5 March 17-18 1990 MacDill AFB Tampa FL April meet schedule MIAMA Proxy Pistachio InterGnats Miami Dade South Col lege available Meet #6 May 12-13 1990 MacDill AFB Tampa Cedar Rapids Approximately weekly flying sessions winter 34-ft ceiling Contact Paul Mcllrath 1524 48th St NE Cedar Rapids IA 52402 I319/393-4677 Kansas Topeka Topeka Model Air crafters Club TOPMAC has regular scheduled events 1990 schedule available Contact Jack Koehlar 3425 SW Arrowhead Rd. Topeka KS 66614-3845 1-913/272-8439 Keuucky Louisville Sessions have held Kentucky Air Na tional Guard Hangar Louis ville Contact Burr Stanton 9210 Darley Dr Louisville KY 40241 further details Massachusetts Cambridge Ray Harlan IS Happy Hollow Rd Wayland MA 01778 1-617/358-4013 Minnesota Burnsville Contests Burnsville Sr High School 35ft ceiling relatively uncluttered three adjacent basketball courts Feb 18 Apr 8 1990 1030 amS pm Contact John OLeary 11425 Kell Circle Bloomington MN 55437 1-612/ 888-0638 Dell Marchant 17110 24th Ave N Plymouth Visit major Model Engine Collectors Association MECA display sale Antique Model Engines during weekend annual WRAM Show White Plains NY MECA activity will Saturday Evening February 24 1990 400 pm mid night Ramada Inn Elmsford NY Ramada Inn 31/2 miles WRAM Show Route 9A mile north Exit #2 off Interstate #287 $500 door donation requested help defray costs February 1990 173 St met Kalmbach Publishing Co PO Box 1612 Waukesha WI 53187 YES Please send me copies RADIO CONTROL BUYERS GUIDE Price per copy SI 295/#I 2066 E Charge credit card Charge E Mastercard CAT NO 106 Proof Switch Retail $995 Add $125 shipping Send $150 catalog Michigan residents add 4% sales tax IMPROVE YOUR 1991 SWITCH OVER f Switch Positive Locking Prevents Arriving field dead batteries Accidental switching off before take-off Will vibrate apart causing loss radio Does require special mounts Works radios Ideal seaplanes completely water proof SEE YOUR LOCAL HOBBY DEALER ej MN 55447 1-612/473-5971 New JerseyGlassboro Doug Barber l46 Stratton House Maple Shade NJ 08052 1-609/235-5318 New YorkQueens Contact Bob Bender I5161248-5118 New York NYC Contact Ed Whitten PO Box 176 Wall St Station New York NY 10005 phone 2l2/785-5327 info about pos sible flying Columbia Univer sity OkIahona Oklahoma City Sessions National Guard Armory Okla homa City Jan 22 Feb 19 1990 plus March date yet set Jim Belson 4933 NW 29th Oklahoma City OK 73l29 I405/946- l093 unavailable locally send Bru Line Industries Inc Box 3786 Center Line MI 48015 Washington Seattle Ed Lamb 159l SE 42nd PI Bellevue WA 98006 CL Aerobatics/Fancher Continued page 68 lington TX 76018 following whets appetite drop line Lets start out Skyray 35 de lightful competent-looking profile unflapped basic Stunt trainer designed Sigs own Mike Pratt Most will recognize Mike designer Sig Magnum suc cessful full-Stunt kit produced last decade Mike also current National Advanced Class Stunt Champion flyingwhat elsea Magnum 44 wingspan 400 sq area Skyray fits squarely niche ruled years venerable Sterling Ring master brief review aerodynamic fea tures including adequate area sound airfoil Kit includes rolled plans cut end sanded pans formed Kleen Sweep lending gear wheel axe steerable tail wheel bracket pusnrod set other basic 55 spanhardware 51 length 4 channel 14Y20 swept wing Symetrical Airfoil Engine 45- 602 cy 525-9074 CrenshawAeroRR 1 Box 121 ManIlla IN 46150 *7995 1*500 P ft HI check MO Visa Mc Other Kits Ave ii Write free cat modern approach moment arms ie long tail moment good stability smooth aerobatic inputs bears witness Skyrays su periority over Ringmaster pure Stunt trainer Reports respected pilots have flown original confirm expectations Powered suggested classic Fox 35 appears perfectly capable good AMA pattern Skyray includes several design innovations worthy note Lite Ply ribs spruce spars provide unusual strength bodes well long life occa sional unexpected landing sturdy properly placed single-wheel main gear should provide good ground handling hard surfaces sur vivability grass fields kit includes good wood especially light well suited Skyrays training mis sion parts either sawn shape die cut fairly complete hardware package features Sigs own very fine nylon bellerank control horns complete sheet decals included al lowing ship finished shown tractive cover picture utilizing base color paint job beneath decals themselves excellent kit well suited its pur pose concept execution would have rate full three stars out four Challenger unique review prototype has flown large number seasoned Stunt aces original last Februarys First Annual Nostalgia Meet flown competitors including George Aldrich Ed Southwick Bart Kiapinaki columnist others concluded excellent intermediate-level Stunter very capable carrying pilot first full pat terns up including Advanced competitions fully flapped profile 565 sq wing area intended 35 46 engines 15% wing area tail some what small relation both wing mod ern design practice good balance ever ship intended develop smooth flying part new Stunt pilot styling modern jet look forward canopy swept rudder wing built-up C-tube-style construc tion includes gear blocks wing-mounted main landing gear fuselage band-sawn shape utilizes good hard-ply doublers solid engine mounting surface fairly com plete hardware package includes bushed con nectors flaps elevators combina tion Sig nylon bellerank horns should make sound durable control sys tem wood good very good manufacturer proudly states wood 174 Model Aviation IULTIMATESPORT RC 255 East Aehlond/PO Boa 727/Sodo Springs Idahe 83276 Aast Reedy t Fly. ReqthesonIyafewJiureoasmmbly. fjjg necessary acceeprlaallhardware cOntvuimen precevered ISIbcHEAOKEE 48 whigujun Speclet 4I6ffAW 4ncwsvd -Ir#emtdrUbugdwhu -11au 60812 Omu Suya% Sport Aerobatic
Edition: Model Aviation - 1990/02
Page Numbers: 63, 170, 173, 174
GOOD NEWS/BAD NEWS has con firmed 1990 Indoor Nats will held good site Johnson City TN conjunction 1990 NFFS Indoor Championships bad news Indoor fliers have major Class AAAA contest 1990 instead two New addresses Bill Hannans Runway has relo cated Box 860 Magalia CA 95954 Send him order postcard remain revised mailing list hadnt noticed Lew Gitlows Indoor Model Supply has Box 5311 Salem OR 97304 tel 1-503/370-6350 some time Prop pamphlet Jim Jones has written brief piece jug props available send SASE $1 0 36631 Ledgestone Mt Clem ens MI 48043 includes step-by-step assem bly discussion some design information Winding review Its some time since have reviewed rhe basic process winding door motors have almost perfect match between motor prop wont well competition proper winding tech niques same applies rubber Regardless best available wont able make best use unless properly wound basic tools takes torque meter geared winder properly wind rubber motors Indoor helps have winder low friction can feel pressure motor small cross section Typical gear ra tios Indoor vinders 101 161 201 101 favorite fliers heavier motors such Pennyplane Torque meters available commercially some fliers build own photos shows very popular torque meter design Ce zar Banks plans unit have appeared nu merous club newsletters Neither commercial nor home-built torque ters can depended upon read correctly un less calibrate known standard torque meter calibrated major con sequence cant directly compare notes other fliers However use same torque meter flights relative torque readings uncalibrated torque ter perfectly useful competition exper imentation Calibrating torque meters want cali brate torque meter usable door start acquiring weight precisely 01 oz Make balanced beam 20 long one-inch increments marked along side shown Figure 1 Center beam torque meter hook apply specific torque calibrated weight Attach beam torque meter centered hook Mount torque meter centerline horizontal beam level Mark zero point scale Hang 01oz weight inch hook rotate torque meter beam level again Mark 0 l-in-oz point scale Repeat point scale moving weight successive inch marks beam higher torque range make longer beam use heavier calibration weight Torque wire selection Charlie Sotich computed force vs twist music wire producing data shown table below Note wire overstressed torque scale will linear torque meter does return zero after hard usage wire has overstressed WireWireTorque in-oz diameterlength3600 rotation ininat max torque 0019 0021 002 3 0025 0027 716 792 867 942 1018 2155 2909 3822 4909 6184 Note preliminary full-scale calibration can made new torque meter adjusting length torque wire Select wire 00134900690 00155651060 00176411543Continued page 170 February 1990 63 Free Flight Indoor Bud Tenny Box 545 Richardson TX 75080 Cezar Banks torque meter plans have printed club newsletters model retrieval gadget seen Johnson City beam has hook end steering line attaches other end balloon strong lift gives stable platform Close cooperation between bal loon man someone holding steering string enables hook end beam slide under model lift off beam No-Cal model built Robert Furr Omaha NE plans Aeromodeler Actually plan British Firecracker turboprop presented round-the-pole Electric mod el Robert used McDonalds food-trays 12-in motor stick 6-in prop craft ship LANDER INDUST 1005 19TH ST CT HAVRE MONTANA 59501 406265-6529 BUILDING BOARD 24x72 5ncf 24 X 48 895 mci fri CANADIAN ORDERS ADD 25/o Build straight spending fortune durable high density 1/2' pin surface bonded 3/4 laminated warp free base straight true work surface will last years years SMALL R/C HOBBY DEALERSIIE WE ARE DISTRIBUTOR KEYED TO YOUR PARTICULAR NEEDS information write call Southern Hobby Distributors 256 Madison Blvd Madison TN 37115 615 868-2100 1030 AM 500 PM CST it too late say have Happy New Year FF Indoor/Tenny Continued page 63 full-scale torque ranges greater desired full-scale value adjust length suit desired rotation example Required one ineh-ounce l80 rotation Us ing 0017-dia wire 180/360 x 1543 in-oz l80 1/07715 x 641 Note torque meter has significant margin prevent overstress expense length Using 0015-dia wire 2825-in-long torque wire would give approximately inchounce 1800 rotation very little stress margin Winding theory As rubber motor wound torque will build slowly first more rapidly rubber approaches breaking point Experience will enable feel winding peak torque important rate buildup torque begins build rapidly reduce stretch slowly keep winding practice can keep piling turns holding torque about same Step-by-step winding Before winding mo tor sure properly lubricated motor has used before examine closely evi dence tearing scuffing Mechanically dam aged rubber should used contest flying should fully wound flying sitAFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In uation youre short rubber use dam aged motors test flying discussion sumes using 0-rings preserve torque values after winding I Stretch motor four six times its nor mal length 2 Wind slowly steadily watching torque meter torque level starts rise rapidly few additional turns stop winding 3 Hold motor massage knots watching torque level drop torque stabilized resume winding 4 Wind very slowly reduce stretch Try hold torque regular level re ducing stretch distancc between hooks model 5 Massage knots again helping torque relax stable level torque stabi lizes again turn back prop small incre ments until stabilized required launch torque 6 Hook motor model fly 7 After model flying record launch turns launch torque low ceilings also record time until first ceiling contact 8 After model lands stop prop un winding hook motor torque meter again Record landing torque count out turns left 9 Compute turns used divide flight time seconds Multiply 60 get rpm Record flight time landing torque rpm average What numbers mean given model weight prop/model combination can de duce optimum trim level flight torque same landing torque eval Continued page 173 TEAM INC BOX 338M BRADYVILLE TN 37026 16151 765-5397 170 Model Aviation durable skis made lightweight aluminum feature steel spring holds ski rigid flight also elevates axle above ski no modifications cur rent gear wire needed can go wheels skis seconds side ski also has special edge allows excellent tracking icy surfaces available two sizes can purchased trikes just mains order please send check money order $300 shipping handling Add 6% sales tax Minnesota Allow 2 weeks delivery Telephone inquiries call Ron 612-781-7333 NORTHERN 20 30 Trike $2200 Mains $1600 MODELING 40 60 Trike $2400 Mains $1800 PRODUCTSPrices effective January 11990 PO Box 21181 ColumbIa HeIghts MN 55421 781-7333 wing rubberbands peck S//ver-Streak 035 ELECTRIC MOTOR SUPER LIGHT WEIGHT ONLY 26 OZ USES LESS CURRENT TURNS 6-3 PROP 12000 RPM 65 AMPS IDEAL FOR SMALL RIC & FREE FLIGHT MOTOR ONLY $1995 CATALOG #30 O PHONE6 19 448-1818 PeckPoIpmers BOX 2498-MA ESA CA 92044 Computer Designed3 Axis Control * Part 103 UltralightEasy Construction * Wood Construction Card # Exp date City State Zip Include poatage handling U S $150 Canadian foreign add 15% minimum $300 Make payment U 5 funda Wiaconain reaidenta add 5% aalea tax 0110 uate level flight torque launch model just enough torque climb slightly should climb out reach stops climbing catch measure level flight torque other data Number remaining turnsshould less 10% launch turns Use shorter heavier loop same sveight reduce number turns remaining Average rpmsome interaction landing torque general lowest average rpm im plies best trim efficient operation no-touch flight uses 85% launch turns optimum trim demon strated lowest average rpm lowest landing torque Note overelevated models may have tendency mush down landing higher torque Cat Howard Haupt 3860 Ec ochee Ave. San Diego CA 92117 Cottitecticut Glastonburv Indoor flying Glastonbury High School first Sunday month through April 1990 except 2nd Sunday March Jerry Bockius 48 Di vision St. Norwich CT 06360 Florida Next time follow-up showing relationship torque turns rpm flight timeplus what ever else will fit Flying opportunities following listings have updated whenever possible Attention CDs Events late March 90 can listed next time calzft.rnia Santa Ana Santa Ana han gar being refurbished availability will limited uncertain first weekend month will sanctioned just case contact Curt Ste veris 25108 Marguerite Park way Mission Viejo CA 92692 phone 1-714/240-8433 about particular session ~alifrrnia Sat Diego Monthly sessions Iowa Miami Dr John Martin 2180 Tigertail Ave Miami FL 33133 phone 1-305/858-6363 following sessions have scheduled MIAMA Indoor Meet #4 Feb 17-18 1990 Cat II Coast Guard Hangar Meet #5 March 17-18 1990 MacDill AFB Tampa FL April meet schedule MIAMA Proxy Pistachio InterGnats Miami Dade South Col lege available Meet #6 May 12-13 1990 MacDill AFB Tampa Cedar Rapids Approximately weekly flying sessions winter 34-ft ceiling Contact Paul Mcllrath 1524 48th St NE Cedar Rapids IA 52402 I319/393-4677 Kansas Topeka Topeka Model Air crafters Club TOPMAC has regular scheduled events 1990 schedule available Contact Jack Koehlar 3425 SW Arrowhead Rd. Topeka KS 66614-3845 1-913/272-8439 Keuucky Louisville Sessions have held Kentucky Air Na tional Guard Hangar Louis ville Contact Burr Stanton 9210 Darley Dr Louisville KY 40241 further details Massachusetts Cambridge Ray Harlan IS Happy Hollow Rd Wayland MA 01778 1-617/358-4013 Minnesota Burnsville Contests Burnsville Sr High School 35ft ceiling relatively uncluttered three adjacent basketball courts Feb 18 Apr 8 1990 1030 amS pm Contact John OLeary 11425 Kell Circle Bloomington MN 55437 1-612/ 888-0638 Dell Marchant 17110 24th Ave N Plymouth Visit major Model Engine Collectors Association MECA display sale Antique Model Engines during weekend annual WRAM Show White Plains NY MECA activity will Saturday Evening February 24 1990 400 pm mid night Ramada Inn Elmsford NY Ramada Inn 31/2 miles WRAM Show Route 9A mile north Exit #2 off Interstate #287 $500 door donation requested help defray costs February 1990 173 St met Kalmbach Publishing Co PO Box 1612 Waukesha WI 53187 YES Please send me copies RADIO CONTROL BUYERS GUIDE Price per copy SI 295/#I 2066 E Charge credit card Charge E Mastercard CAT NO 106 Proof Switch Retail $995 Add $125 shipping Send $150 catalog Michigan residents add 4% sales tax IMPROVE YOUR 1991 SWITCH OVER f Switch Positive Locking Prevents Arriving field dead batteries Accidental switching off before take-off Will vibrate apart causing loss radio Does require special mounts Works radios Ideal seaplanes completely water proof SEE YOUR LOCAL HOBBY DEALER ej MN 55447 1-612/473-5971 New JerseyGlassboro Doug Barber l46 Stratton House Maple Shade NJ 08052 1-609/235-5318 New YorkQueens Contact Bob Bender I5161248-5118 New York NYC Contact Ed Whitten PO Box 176 Wall St Station New York NY 10005 phone 2l2/785-5327 info about pos sible flying Columbia Univer sity OkIahona Oklahoma City Sessions National Guard Armory Okla homa City Jan 22 Feb 19 1990 plus March date yet set Jim Belson 4933 NW 29th Oklahoma City OK 73l29 I405/946- l093 unavailable locally send Bru Line Industries Inc Box 3786 Center Line MI 48015 Washington Seattle Ed Lamb 159l SE 42nd PI Bellevue WA 98006 CL Aerobatics/Fancher Continued page 68 lington TX 76018 following whets appetite drop line Lets start out Skyray 35 de lightful competent-looking profile unflapped basic Stunt trainer designed Sigs own Mike Pratt Most will recognize Mike designer Sig Magnum suc cessful full-Stunt kit produced last decade Mike also current National Advanced Class Stunt Champion flyingwhat elsea Magnum 44 wingspan 400 sq area Skyray fits squarely niche ruled years venerable Sterling Ring master brief review aerodynamic fea tures including adequate area sound airfoil Kit includes rolled plans cut end sanded pans formed Kleen Sweep lending gear wheel axe steerable tail wheel bracket pusnrod set other basic 55 spanhardware 51 length 4 channel 14Y20 swept wing Symetrical Airfoil Engine 45- 602 cy 525-9074 CrenshawAeroRR 1 Box 121 ManIlla IN 46150 *7995 1*500 P ft HI check MO Visa Mc Other Kits Ave ii Write free cat modern approach moment arms ie long tail moment good stability smooth aerobatic inputs bears witness Skyrays su periority over Ringmaster pure Stunt trainer Reports respected pilots have flown original confirm expectations Powered suggested classic Fox 35 appears perfectly capable good AMA pattern Skyray includes several design innovations worthy note Lite Ply ribs spruce spars provide unusual strength bodes well long life occa sional unexpected landing sturdy properly placed single-wheel main gear should provide good ground handling hard surfaces sur vivability grass fields kit includes good wood especially light well suited Skyrays training mis sion parts either sawn shape die cut fairly complete hardware package features Sigs own very fine nylon bellerank control horns complete sheet decals included al lowing ship finished shown tractive cover picture utilizing base color paint job beneath decals themselves excellent kit well suited its pur pose concept execution would have rate full three stars out four Challenger unique review prototype has flown large number seasoned Stunt aces original last Februarys First Annual Nostalgia Meet flown competitors including George Aldrich Ed Southwick Bart Kiapinaki columnist others concluded excellent intermediate-level Stunter very capable carrying pilot first full pat terns up including Advanced competitions fully flapped profile 565 sq wing area intended 35 46 engines 15% wing area tail some what small relation both wing mod ern design practice good balance ever ship intended develop smooth flying part new Stunt pilot styling modern jet look forward canopy swept rudder wing built-up C-tube-style construc tion includes gear blocks wing-mounted main landing gear fuselage band-sawn shape utilizes good hard-ply doublers solid engine mounting surface fairly com plete hardware package includes bushed con nectors flaps elevators combina tion Sig nylon bellerank horns should make sound durable control sys tem wood good very good manufacturer proudly states wood 174 Model Aviation IULTIMATESPORT RC 255 East Aehlond/PO Boa 727/Sodo Springs Idahe 83276 Aast Reedy t Fly. ReqthesonIyafewJiureoasmmbly. fjjg necessary acceeprlaallhardware cOntvuimen precevered ISIbcHEAOKEE 48 whigujun Speclet 4I6ffAW 4ncwsvd -Ir#emtdrUbugdwhu -11au 60812 Omu Suya% Sport Aerobatic
Edition: Model Aviation - 1990/02
Page Numbers: 63, 170, 173, 174
GOOD NEWS/BAD NEWS has con firmed 1990 Indoor Nats will held good site Johnson City TN conjunction 1990 NFFS Indoor Championships bad news Indoor fliers have major Class AAAA contest 1990 instead two New addresses Bill Hannans Runway has relo cated Box 860 Magalia CA 95954 Send him order postcard remain revised mailing list hadnt noticed Lew Gitlows Indoor Model Supply has Box 5311 Salem OR 97304 tel 1-503/370-6350 some time Prop pamphlet Jim Jones has written brief piece jug props available send SASE $1 0 36631 Ledgestone Mt Clem ens MI 48043 includes step-by-step assem bly discussion some design information Winding review Its some time since have reviewed rhe basic process winding door motors have almost perfect match between motor prop wont well competition proper winding tech niques same applies rubber Regardless best available wont able make best use unless properly wound basic tools takes torque meter geared winder properly wind rubber motors Indoor helps have winder low friction can feel pressure motor small cross section Typical gear ra tios Indoor vinders 101 161 201 101 favorite fliers heavier motors such Pennyplane Torque meters available commercially some fliers build own photos shows very popular torque meter design Ce zar Banks plans unit have appeared nu merous club newsletters Neither commercial nor home-built torque ters can depended upon read correctly un less calibrate known standard torque meter calibrated major con sequence cant directly compare notes other fliers However use same torque meter flights relative torque readings uncalibrated torque ter perfectly useful competition exper imentation Calibrating torque meters want cali brate torque meter usable door start acquiring weight precisely 01 oz Make balanced beam 20 long one-inch increments marked along side shown Figure 1 Center beam torque meter hook apply specific torque calibrated weight Attach beam torque meter centered hook Mount torque meter centerline horizontal beam level Mark zero point scale Hang 01oz weight inch hook rotate torque meter beam level again Mark 0 l-in-oz point scale Repeat point scale moving weight successive inch marks beam higher torque range make longer beam use heavier calibration weight Torque wire selection Charlie Sotich computed force vs twist music wire producing data shown table below Note wire overstressed torque scale will linear torque meter does return zero after hard usage wire has overstressed WireWireTorque in-oz diameterlength3600 rotation ininat max torque 0019 0021 002 3 0025 0027 716 792 867 942 1018 2155 2909 3822 4909 6184 Note preliminary full-scale calibration can made new torque meter adjusting length torque wire Select wire 00134900690 00155651060 00176411543Continued page 170 February 1990 63 Free Flight Indoor Bud Tenny Box 545 Richardson TX 75080 Cezar Banks torque meter plans have printed club newsletters model retrieval gadget seen Johnson City beam has hook end steering line attaches other end balloon strong lift gives stable platform Close cooperation between bal loon man someone holding steering string enables hook end beam slide under model lift off beam No-Cal model built Robert Furr Omaha NE plans Aeromodeler Actually plan British Firecracker turboprop presented round-the-pole Electric mod el Robert used McDonalds food-trays 12-in motor stick 6-in prop craft ship LANDER INDUST 1005 19TH ST CT HAVRE MONTANA 59501 406265-6529 BUILDING BOARD 24x72 5ncf 24 X 48 895 mci fri CANADIAN ORDERS ADD 25/o Build straight spending fortune durable high density 1/2' pin surface bonded 3/4 laminated warp free base straight true work surface will last years years SMALL R/C HOBBY DEALERSIIE WE ARE DISTRIBUTOR KEYED TO YOUR PARTICULAR NEEDS information write call Southern Hobby Distributors 256 Madison Blvd Madison TN 37115 615 868-2100 1030 AM 500 PM CST it too late say have Happy New Year FF Indoor/Tenny Continued page 63 full-scale torque ranges greater desired full-scale value adjust length suit desired rotation example Required one ineh-ounce l80 rotation Us ing 0017-dia wire 180/360 x 1543 in-oz l80 1/07715 x 641 Note torque meter has significant margin prevent overstress expense length Using 0015-dia wire 2825-in-long torque wire would give approximately inchounce 1800 rotation very little stress margin Winding theory As rubber motor wound torque will build slowly first more rapidly rubber approaches breaking point Experience will enable feel winding peak torque important rate buildup torque begins build rapidly reduce stretch slowly keep winding practice can keep piling turns holding torque about same Step-by-step winding Before winding mo tor sure properly lubricated motor has used before examine closely evi dence tearing scuffing Mechanically dam aged rubber should used contest flying should fully wound flying sitAFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In uation youre short rubber use dam aged motors test flying discussion sumes using 0-rings preserve torque values after winding I Stretch motor four six times its nor mal length 2 Wind slowly steadily watching torque meter torque level starts rise rapidly few additional turns stop winding 3 Hold motor massage knots watching torque level drop torque stabilized resume winding 4 Wind very slowly reduce stretch Try hold torque regular level re ducing stretch distancc between hooks model 5 Massage knots again helping torque relax stable level torque stabi lizes again turn back prop small incre ments until stabilized required launch torque 6 Hook motor model fly 7 After model flying record launch turns launch torque low ceilings also record time until first ceiling contact 8 After model lands stop prop un winding hook motor torque meter again Record landing torque count out turns left 9 Compute turns used divide flight time seconds Multiply 60 get rpm Record flight time landing torque rpm average What numbers mean given model weight prop/model combination can de duce optimum trim level flight torque same landing torque eval Continued page 173 TEAM INC BOX 338M BRADYVILLE TN 37026 16151 765-5397 170 Model Aviation durable skis made lightweight aluminum feature steel spring holds ski rigid flight also elevates axle above ski no modifications cur rent gear wire needed can go wheels skis seconds side ski also has special edge allows excellent tracking icy surfaces available two sizes can purchased trikes just mains order please send check money order $300 shipping handling Add 6% sales tax Minnesota Allow 2 weeks delivery Telephone inquiries call Ron 612-781-7333 NORTHERN 20 30 Trike $2200 Mains $1600 MODELING 40 60 Trike $2400 Mains $1800 PRODUCTSPrices effective January 11990 PO Box 21181 ColumbIa HeIghts MN 55421 781-7333 wing rubberbands peck S//ver-Streak 035 ELECTRIC MOTOR SUPER LIGHT WEIGHT ONLY 26 OZ USES LESS CURRENT TURNS 6-3 PROP 12000 RPM 65 AMPS IDEAL FOR SMALL RIC & FREE FLIGHT MOTOR ONLY $1995 CATALOG #30 O PHONE6 19 448-1818 PeckPoIpmers BOX 2498-MA ESA CA 92044 Computer Designed3 Axis Control * Part 103 UltralightEasy Construction * Wood Construction Card # Exp date City State Zip Include poatage handling U S $150 Canadian foreign add 15% minimum $300 Make payment U 5 funda Wiaconain reaidenta add 5% aalea tax 0110 uate level flight torque launch model just enough torque climb slightly should climb out reach stops climbing catch measure level flight torque other data Number remaining turnsshould less 10% launch turns Use shorter heavier loop same sveight reduce number turns remaining Average rpmsome interaction landing torque general lowest average rpm im plies best trim efficient operation no-touch flight uses 85% launch turns optimum trim demon strated lowest average rpm lowest landing torque Note overelevated models may have tendency mush down landing higher torque Cat Howard Haupt 3860 Ec ochee Ave. San Diego CA 92117 Cottitecticut Glastonburv Indoor flying Glastonbury High School first Sunday month through April 1990 except 2nd Sunday March Jerry Bockius 48 Di vision St. Norwich CT 06360 Florida Next time follow-up showing relationship torque turns rpm flight timeplus what ever else will fit Flying opportunities following listings have updated whenever possible Attention CDs Events late March 90 can listed next time calzft.rnia Santa Ana Santa Ana han gar being refurbished availability will limited uncertain first weekend month will sanctioned just case contact Curt Ste veris 25108 Marguerite Park way Mission Viejo CA 92692 phone 1-714/240-8433 about particular session ~alifrrnia Sat Diego Monthly sessions Iowa Miami Dr John Martin 2180 Tigertail Ave Miami FL 33133 phone 1-305/858-6363 following sessions have scheduled MIAMA Indoor Meet #4 Feb 17-18 1990 Cat II Coast Guard Hangar Meet #5 March 17-18 1990 MacDill AFB Tampa FL April meet schedule MIAMA Proxy Pistachio InterGnats Miami Dade South Col lege available Meet #6 May 12-13 1990 MacDill AFB Tampa Cedar Rapids Approximately weekly flying sessions winter 34-ft ceiling Contact Paul Mcllrath 1524 48th St NE Cedar Rapids IA 52402 I319/393-4677 Kansas Topeka Topeka Model Air crafters Club TOPMAC has regular scheduled events 1990 schedule available Contact Jack Koehlar 3425 SW Arrowhead Rd. Topeka KS 66614-3845 1-913/272-8439 Keuucky Louisville Sessions have held Kentucky Air Na tional Guard Hangar Louis ville Contact Burr Stanton 9210 Darley Dr Louisville KY 40241 further details Massachusetts Cambridge Ray Harlan IS Happy Hollow Rd Wayland MA 01778 1-617/358-4013 Minnesota Burnsville Contests Burnsville Sr High School 35ft ceiling relatively uncluttered three adjacent basketball courts Feb 18 Apr 8 1990 1030 amS pm Contact John OLeary 11425 Kell Circle Bloomington MN 55437 1-612/ 888-0638 Dell Marchant 17110 24th Ave N Plymouth Visit major Model Engine Collectors Association MECA display sale Antique Model Engines during weekend annual WRAM Show White Plains NY MECA activity will Saturday Evening February 24 1990 400 pm mid night Ramada Inn Elmsford NY Ramada Inn 31/2 miles WRAM Show Route 9A mile north Exit #2 off Interstate #287 $500 door donation requested help defray costs February 1990 173 St met Kalmbach Publishing Co PO Box 1612 Waukesha WI 53187 YES Please send me copies RADIO CONTROL BUYERS GUIDE Price per copy SI 295/#I 2066 E Charge credit card Charge E Mastercard CAT NO 106 Proof Switch Retail $995 Add $125 shipping Send $150 catalog Michigan residents add 4% sales tax IMPROVE YOUR 1991 SWITCH OVER f Switch Positive Locking Prevents Arriving field dead batteries Accidental switching off before take-off Will vibrate apart causing loss radio Does require special mounts Works radios Ideal seaplanes completely water proof SEE YOUR LOCAL HOBBY DEALER ej MN 55447 1-612/473-5971 New JerseyGlassboro Doug Barber l46 Stratton House Maple Shade NJ 08052 1-609/235-5318 New YorkQueens Contact Bob Bender I5161248-5118 New York NYC Contact Ed Whitten PO Box 176 Wall St Station New York NY 10005 phone 2l2/785-5327 info about pos sible flying Columbia Univer sity OkIahona Oklahoma City Sessions National Guard Armory Okla homa City Jan 22 Feb 19 1990 plus March date yet set Jim Belson 4933 NW 29th Oklahoma City OK 73l29 I405/946- l093 unavailable locally send Bru Line Industries Inc Box 3786 Center Line MI 48015 Washington Seattle Ed Lamb 159l SE 42nd PI Bellevue WA 98006 CL Aerobatics/Fancher Continued page 68 lington TX 76018 following whets appetite drop line Lets start out Skyray 35 de lightful competent-looking profile unflapped basic Stunt trainer designed Sigs own Mike Pratt Most will recognize Mike designer Sig Magnum suc cessful full-Stunt kit produced last decade Mike also current National Advanced Class Stunt Champion flyingwhat elsea Magnum 44 wingspan 400 sq area Skyray fits squarely niche ruled years venerable Sterling Ring master brief review aerodynamic fea tures including adequate area sound airfoil Kit includes rolled plans cut end sanded pans formed Kleen Sweep lending gear wheel axe steerable tail wheel bracket pusnrod set other basic 55 spanhardware 51 length 4 channel 14Y20 swept wing Symetrical Airfoil Engine 45- 602 cy 525-9074 CrenshawAeroRR 1 Box 121 ManIlla IN 46150 *7995 1*500 P ft HI check MO Visa Mc Other Kits Ave ii Write free cat modern approach moment arms ie long tail moment good stability smooth aerobatic inputs bears witness Skyrays su periority over Ringmaster pure Stunt trainer Reports respected pilots have flown original confirm expectations Powered suggested classic Fox 35 appears perfectly capable good AMA pattern Skyray includes several design innovations worthy note Lite Ply ribs spruce spars provide unusual strength bodes well long life occa sional unexpected landing sturdy properly placed single-wheel main gear should provide good ground handling hard surfaces sur vivability grass fields kit includes good wood especially light well suited Skyrays training mis sion parts either sawn shape die cut fairly complete hardware package features Sigs own very fine nylon bellerank control horns complete sheet decals included al lowing ship finished shown tractive cover picture utilizing base color paint job beneath decals themselves excellent kit well suited its pur pose concept execution would have rate full three stars out four Challenger unique review prototype has flown large number seasoned Stunt aces original last Februarys First Annual Nostalgia Meet flown competitors including George Aldrich Ed Southwick Bart Kiapinaki columnist others concluded excellent intermediate-level Stunter very capable carrying pilot first full pat terns up including Advanced competitions fully flapped profile 565 sq wing area intended 35 46 engines 15% wing area tail some what small relation both wing mod ern design practice good balance ever ship intended develop smooth flying part new Stunt pilot styling modern jet look forward canopy swept rudder wing built-up C-tube-style construc tion includes gear blocks wing-mounted main landing gear fuselage band-sawn shape utilizes good hard-ply doublers solid engine mounting surface fairly com plete hardware package includes bushed con nectors flaps elevators combina tion Sig nylon bellerank horns should make sound durable control sys tem wood good very good manufacturer proudly states wood 174 Model Aviation IULTIMATESPORT RC 255 East Aehlond/PO Boa 727/Sodo Springs Idahe 83276 Aast Reedy t Fly. ReqthesonIyafewJiureoasmmbly. fjjg necessary acceeprlaallhardware cOntvuimen precevered ISIbcHEAOKEE 48 whigujun Speclet 4I6ffAW 4ncwsvd -Ir#emtdrUbugdwhu -11au 60812 Omu Suya% Sport Aerobatic
Edition: Model Aviation - 1990/02
Page Numbers: 63, 170, 173, 174
GOOD NEWS/BAD NEWS has con firmed 1990 Indoor Nats will held good site Johnson City TN conjunction 1990 NFFS Indoor Championships bad news Indoor fliers have major Class AAAA contest 1990 instead two New addresses Bill Hannans Runway has relo cated Box 860 Magalia CA 95954 Send him order postcard remain revised mailing list hadnt noticed Lew Gitlows Indoor Model Supply has Box 5311 Salem OR 97304 tel 1-503/370-6350 some time Prop pamphlet Jim Jones has written brief piece jug props available send SASE $1 0 36631 Ledgestone Mt Clem ens MI 48043 includes step-by-step assem bly discussion some design information Winding review Its some time since have reviewed rhe basic process winding door motors have almost perfect match between motor prop wont well competition proper winding tech niques same applies rubber Regardless best available wont able make best use unless properly wound basic tools takes torque meter geared winder properly wind rubber motors Indoor helps have winder low friction can feel pressure motor small cross section Typical gear ra tios Indoor vinders 101 161 201 101 favorite fliers heavier motors such Pennyplane Torque meters available commercially some fliers build own photos shows very popular torque meter design Ce zar Banks plans unit have appeared nu merous club newsletters Neither commercial nor home-built torque ters can depended upon read correctly un less calibrate known standard torque meter calibrated major con sequence cant directly compare notes other fliers However use same torque meter flights relative torque readings uncalibrated torque ter perfectly useful competition exper imentation Calibrating torque meters want cali brate torque meter usable door start acquiring weight precisely 01 oz Make balanced beam 20 long one-inch increments marked along side shown Figure 1 Center beam torque meter hook apply specific torque calibrated weight Attach beam torque meter centered hook Mount torque meter centerline horizontal beam level Mark zero point scale Hang 01oz weight inch hook rotate torque meter beam level again Mark 0 l-in-oz point scale Repeat point scale moving weight successive inch marks beam higher torque range make longer beam use heavier calibration weight Torque wire selection Charlie Sotich computed force vs twist music wire producing data shown table below Note wire overstressed torque scale will linear torque meter does return zero after hard usage wire has overstressed WireWireTorque in-oz diameterlength3600 rotation ininat max torque 0019 0021 002 3 0025 0027 716 792 867 942 1018 2155 2909 3822 4909 6184 Note preliminary full-scale calibration can made new torque meter adjusting length torque wire Select wire 00134900690 00155651060 00176411543Continued page 170 February 1990 63 Free Flight Indoor Bud Tenny Box 545 Richardson TX 75080 Cezar Banks torque meter plans have printed club newsletters model retrieval gadget seen Johnson City beam has hook end steering line attaches other end balloon strong lift gives stable platform Close cooperation between bal loon man someone holding steering string enables hook end beam slide under model lift off beam No-Cal model built Robert Furr Omaha NE plans Aeromodeler Actually plan British Firecracker turboprop presented round-the-pole Electric mod el Robert used McDonalds food-trays 12-in motor stick 6-in prop craft ship LANDER INDUST 1005 19TH ST CT HAVRE MONTANA 59501 406265-6529 BUILDING BOARD 24x72 5ncf 24 X 48 895 mci fri CANADIAN ORDERS ADD 25/o Build straight spending fortune durable high density 1/2' pin surface bonded 3/4 laminated warp free base straight true work surface will last years years SMALL R/C HOBBY DEALERSIIE WE ARE DISTRIBUTOR KEYED TO YOUR PARTICULAR NEEDS information write call Southern Hobby Distributors 256 Madison Blvd Madison TN 37115 615 868-2100 1030 AM 500 PM CST it too late say have Happy New Year FF Indoor/Tenny Continued page 63 full-scale torque ranges greater desired full-scale value adjust length suit desired rotation example Required one ineh-ounce l80 rotation Us ing 0017-dia wire 180/360 x 1543 in-oz l80 1/07715 x 641 Note torque meter has significant margin prevent overstress expense length Using 0015-dia wire 2825-in-long torque wire would give approximately inchounce 1800 rotation very little stress margin Winding theory As rubber motor wound torque will build slowly first more rapidly rubber approaches breaking point Experience will enable feel winding peak torque important rate buildup torque begins build rapidly reduce stretch slowly keep winding practice can keep piling turns holding torque about same Step-by-step winding Before winding mo tor sure properly lubricated motor has used before examine closely evi dence tearing scuffing Mechanically dam aged rubber should used contest flying should fully wound flying sitAFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING INFO $300BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion Reserve Grand Champion Ultralight 1989 Sun-N-Fun Fly-In uation youre short rubber use dam aged motors test flying discussion sumes using 0-rings preserve torque values after winding I Stretch motor four six times its nor mal length 2 Wind slowly steadily watching torque meter torque level starts rise rapidly few additional turns stop winding 3 Hold motor massage knots watching torque level drop torque stabilized resume winding 4 Wind very slowly reduce stretch Try hold torque regular level re ducing stretch distancc between hooks model 5 Massage knots again helping torque relax stable level torque stabi lizes again turn back prop small incre ments until stabilized required launch torque 6 Hook motor model fly 7 After model flying record launch turns launch torque low ceilings also record time until first ceiling contact 8 After model lands stop prop un winding hook motor torque meter again Record landing torque count out turns left 9 Compute turns used divide flight time seconds Multiply 60 get rpm Record flight time landing torque rpm average What numbers mean given model weight prop/model combination can de duce optimum trim level flight torque same landing torque eval Continued page 173 TEAM INC BOX 338M BRADYVILLE TN 37026 16151 765-5397 170 Model Aviation durable skis made lightweight aluminum feature steel spring holds ski rigid flight also elevates axle above ski no modifications cur rent gear wire needed can go wheels skis seconds side ski also has special edge allows excellent tracking icy surfaces available two sizes can purchased trikes just mains order please send check money order $300 shipping handling Add 6% sales tax Minnesota Allow 2 weeks delivery Telephone inquiries call Ron 612-781-7333 NORTHERN 20 30 Trike $2200 Mains $1600 MODELING 40 60 Trike $2400 Mains $1800 PRODUCTSPrices effective January 11990 PO Box 21181 ColumbIa HeIghts MN 55421 781-7333 wing rubberbands peck S//ver-Streak 035 ELECTRIC MOTOR SUPER LIGHT WEIGHT ONLY 26 OZ USES LESS CURRENT TURNS 6-3 PROP 12000 RPM 65 AMPS IDEAL FOR SMALL RIC & FREE FLIGHT MOTOR ONLY $1995 CATALOG #30 O PHONE6 19 448-1818 PeckPoIpmers BOX 2498-MA ESA CA 92044 Computer Designed3 Axis Control * Part 103 UltralightEasy Construction * Wood Construction Card # Exp date City State Zip Include poatage handling U S $150 Canadian foreign add 15% minimum $300 Make payment U 5 funda Wiaconain reaidenta add 5% aalea tax 0110 uate level flight torque launch model just enough torque climb slightly should climb out reach stops climbing catch measure level flight torque other data Number remaining turnsshould less 10% launch turns Use shorter heavier loop same sveight reduce number turns remaining Average rpmsome interaction landing torque general lowest average rpm im plies best trim efficient operation no-touch flight uses 85% launch turns optimum trim demon strated lowest average rpm lowest landing torque Note overelevated models may have tendency mush down landing higher torque Cat Howard Haupt 3860 Ec ochee Ave. San Diego CA 92117 Cottitecticut Glastonburv Indoor flying Glastonbury High School first Sunday month through April 1990 except 2nd Sunday March Jerry Bockius 48 Di vision St. Norwich CT 06360 Florida Next time follow-up showing relationship torque turns rpm flight timeplus what ever else will fit Flying opportunities following listings have updated whenever possible Attention CDs Events late March 90 can listed next time calzft.rnia Santa Ana Santa Ana han gar being refurbished availability will limited uncertain first weekend month will sanctioned just case contact Curt Ste veris 25108 Marguerite Park way Mission Viejo CA 92692 phone 1-714/240-8433 about particular session ~alifrrnia Sat Diego Monthly sessions Iowa Miami Dr John Martin 2180 Tigertail Ave Miami FL 33133 phone 1-305/858-6363 following sessions have scheduled MIAMA Indoor Meet #4 Feb 17-18 1990 Cat II Coast Guard Hangar Meet #5 March 17-18 1990 MacDill AFB Tampa FL April meet schedule MIAMA Proxy Pistachio InterGnats Miami Dade South Col lege available Meet #6 May 12-13 1990 MacDill AFB Tampa Cedar Rapids Approximately weekly flying sessions winter 34-ft ceiling Contact Paul Mcllrath 1524 48th St NE Cedar Rapids IA 52402 I319/393-4677 Kansas Topeka Topeka Model Air crafters Club TOPMAC has regular scheduled events 1990 schedule available Contact Jack Koehlar 3425 SW Arrowhead Rd. Topeka KS 66614-3845 1-913/272-8439 Keuucky Louisville Sessions have held Kentucky Air Na tional Guard Hangar Louis ville Contact Burr Stanton 9210 Darley Dr Louisville KY 40241 further details Massachusetts Cambridge Ray Harlan IS Happy Hollow Rd Wayland MA 01778 1-617/358-4013 Minnesota Burnsville Contests Burnsville Sr High School 35ft ceiling relatively uncluttered three adjacent basketball courts Feb 18 Apr 8 1990 1030 amS pm Contact John OLeary 11425 Kell Circle Bloomington MN 55437 1-612/ 888-0638 Dell Marchant 17110 24th Ave N Plymouth Visit major Model Engine Collectors Association MECA display sale Antique Model Engines during weekend annual WRAM Show White Plains NY MECA activity will Saturday Evening February 24 1990 400 pm mid night Ramada Inn Elmsford NY Ramada Inn 31/2 miles WRAM Show Route 9A mile north Exit #2 off Interstate #287 $500 door donation requested help defray costs February 1990 173 St met Kalmbach Publishing Co PO Box 1612 Waukesha WI 53187 YES Please send me copies RADIO CONTROL BUYERS GUIDE Price per copy SI 295/#I 2066 E Charge credit card Charge E Mastercard CAT NO 106 Proof Switch Retail $995 Add $125 shipping Send $150 catalog Michigan residents add 4% sales tax IMPROVE YOUR 1991 SWITCH OVER f Switch Positive Locking Prevents Arriving field dead batteries Accidental switching off before take-off Will vibrate apart causing loss radio Does require special mounts Works radios Ideal seaplanes completely water proof SEE YOUR LOCAL HOBBY DEALER ej MN 55447 1-612/473-5971 New JerseyGlassboro Doug Barber l46 Stratton House Maple Shade NJ 08052 1-609/235-5318 New YorkQueens Contact Bob Bender I5161248-5118 New York NYC Contact Ed Whitten PO Box 176 Wall St Station New York NY 10005 phone 2l2/785-5327 info about pos sible flying Columbia Univer sity OkIahona Oklahoma City Sessions National Guard Armory Okla homa City Jan 22 Feb 19 1990 plus March date yet set Jim Belson 4933 NW 29th Oklahoma City OK 73l29 I405/946- l093 unavailable locally send Bru Line Industries Inc Box 3786 Center Line MI 48015 Washington Seattle Ed Lamb 159l SE 42nd PI Bellevue WA 98006 CL Aerobatics/Fancher Continued page 68 lington TX 76018 following whets appetite drop line Lets start out Skyray 35 de lightful competent-looking profile unflapped basic Stunt trainer designed Sigs own Mike Pratt Most will recognize Mike designer Sig Magnum suc cessful full-Stunt kit produced last decade Mike also current National Advanced Class Stunt Champion flyingwhat elsea Magnum 44 wingspan 400 sq area Skyray fits squarely niche ruled years venerable Sterling Ring master brief review aerodynamic fea tures including adequate area sound airfoil Kit includes rolled plans cut end sanded pans formed Kleen Sweep lending gear wheel axe steerable tail wheel bracket pusnrod set other basic 55 spanhardware 51 length 4 channel 14Y20 swept wing Symetrical Airfoil Engine 45- 602 cy 525-9074 CrenshawAeroRR 1 Box 121 ManIlla IN 46150 *7995 1*500 P ft HI check MO Visa Mc Other Kits Ave ii Write free cat modern approach moment arms ie long tail moment good stability smooth aerobatic inputs bears witness Skyrays su periority over Ringmaster pure Stunt trainer Reports respected pilots have flown original confirm expectations Powered suggested classic Fox 35 appears perfectly capable good AMA pattern Skyray includes several design innovations worthy note Lite Ply ribs spruce spars provide unusual strength bodes well long life occa sional unexpected landing sturdy properly placed single-wheel main gear should provide good ground handling hard surfaces sur vivability grass fields kit includes good wood especially light well suited Skyrays training mis sion parts either sawn shape die cut fairly complete hardware package features Sigs own very fine nylon bellerank control horns complete sheet decals included al lowing ship finished shown tractive cover picture utilizing base color paint job beneath decals themselves excellent kit well suited its pur pose concept execution would have rate full three stars out four Challenger unique review prototype has flown large number seasoned Stunt aces original last Februarys First Annual Nostalgia Meet flown competitors including George Aldrich Ed Southwick Bart Kiapinaki columnist others concluded excellent intermediate-level Stunter very capable carrying pilot first full pat terns up including Advanced competitions fully flapped profile 565 sq wing area intended 35 46 engines 15% wing area tail some what small relation both wing mod ern design practice good balance ever ship intended develop smooth flying part new Stunt pilot styling modern jet look forward canopy swept rudder wing built-up C-tube-style construc tion includes gear blocks wing-mounted main landing gear fuselage band-sawn shape utilizes good hard-ply doublers solid engine mounting surface fairly com plete hardware package includes bushed con nectors flaps elevators combina tion Sig nylon bellerank horns should make sound durable control sys tem wood good very good manufacturer proudly states wood 174 Model Aviation IULTIMATESPORT RC 255 East Aehlond/PO Boa 727/Sodo Springs Idahe 83276 Aast Reedy t Fly. ReqthesonIyafewJiureoasmmbly. fjjg necessary acceeprlaallhardware cOntvuimen precevered ISIbcHEAOKEE 48 whigujun Speclet 4I6ffAW 4ncwsvd -Ir#emtdrUbugdwhu -11au 60812 Omu Suya% Sport Aerobatic