THE SNOW should soon swirling over landits beginning building season Hope have xour Giant Scale project ready go lot has happened during past months hi atus Thus months column will pot pourri things have occurred Giant Scale arena interim best news Quadra fans among us Al Scott Scotts Airplane Co Rt #1 Neode sha KS 66757 now US Quadra Al bought out good friend Dario Brisighella now prime source Quadra bits pieces Another good friend Klaus Nowak has ac quired dies facilities people will soon hasnt already manufacturing Quadra engines produc tion Quadra engines very iffy thing manufacturer Canada went bankrupt future popular engine looked dim Things now considerably brighter incidentally Dario 1032 E Manitowoc Ave Oak Creek WI 53154 still selling magnificent Giant Scale drawings Waco ARE Starduster et al Mix match Herb Heaton still providing teresting copy remember discussion Herbs problems Giant model al lost second flight noise filters aileron circuit didnt function cause poor solder connection Two addi tional difficulties have plagued him same photo left 10-year-old Mike Selvenis used family Sopwith Pup trainer learn fly RC dad Dave drew plans built model photo right Fred Wallmans assembled Ryan B-S before recent move Arizona Quarter-scale bird spans 126 Author John de Vries also building about same stage completion Freds dummy engine really looks great Giant Scale models small Golden Age air racers turn out small too Don Neills Folkerts SK-3 L case point spans mere 66 Sachs 32 powers 23-lb craft Dons going Install retracts offer plans sale John Lanes Northville Ml Luscombe R incor porates features several 8A-8E series full-scale aircraft An OS 120 four-stroke powers 85-in-span Giant Plans derived doubling size Cleveland 43-in-span Free Flight kit Model weighs 13 lb uses 2 aileron servos handmade fiberglass cowl 52 Model Aviation Radio Control Giant Scale John de Vries Colonel USAF Ret 4610 Moffat Ln Colorado Springs CO 80915 John Pattons Phoenix AZ beautiful 12-lb Waco Pica kit Power provided Ma loney 125 made model License numbers Vinylwrite Custom Lettering bird airborne very hot day last sum mer iron-on covering began coming off wing talking about big hunks course didnt lot good models aerodynamicswith expected results great skill cunning Herb able get bird ground what found bonechilling Herb used two kinds plastic covering model high-temperature film other low-temperature film used trim hot day caused separate postmortem also revealed eleva tors both full-up position locked way Explanation latter phenomenon easy Hed used servo wheels manu facturer other built ser vos Although wheels apparently fit ser vos perfectly under no-load condition wasnt really case airloads ap plied almost-undetectable misfit tween servos square drive studs square recesses output wheels Airloads during flight allowed studs rotate within recesses jam elevators Moral partic ularly careful mix n match bits pieces building Giant Murphys Law lies wait careless kids taking overand happily About four years ago Dave Selvenis Oly phant PA drew set plans Giant Sopwith Pup son Mike six years old time four years ago interim Mike learned fly RC using Pup trainer Hes sticks 90% time according Dave Now 10 Mike mild aerobatics has talked dad building Bob Nelitzs A-scale Cub sure could use thousands Mike Selvenises Doe again Recently Doe Pepino ac quired Pat Pattisons -scale draw ings 1930 Lincoln Sport biplane birds stick-for-stick re-creation original bird plans magnificent Prices $2795 A-scale $2995 -scale youre interested Doe Pepinos address Scale Plans Photo Service 3209 Madison Ave Greensboro NC 27403 Hes also published new photo-pack drawings listing $4 US $6 overseas Thanks Bob Eson Dawn Patrol Chapter 90 IMAA hear 1989 Rally Giants Odessa TX spectacular success over 400 models 289 fliers big IMAA festival lived up its advance publicity West Texas Magnum Squadron Chapter 172 Odessa Prop Busters RC Club put get-together drew modelers far nearContinued page 157 sSAYAJITIHI ZZIDUDWNZZDD 7sss sin Gsre sod cdero c 422 4561717 December 1989 53 bones Pat Pattisons -scale 1930 Lincoln Sport biplane Drawings avail able Doc Pepino details column LINE METAL SPECIALISTS u LINE OF QUADRA ENGINES PARTS ACCESSORIES UPERTANKS& SUPERMUFFLERS FULLLINEOFZINGER WOOD PROPS oGIANT SCALE R/C PLANS SEND $1 FOR COMPLETE CATALOG TO DEALERALLEN SCOlT QUADRA ]NVLTIEDLUJ RT 1 NEODESHA KS 66757 25-2821 $475 $475AVAILABLE AT AMERICAS a/s TRIBUTED BY FINEST HOBBY SHOPS SR Battery Packs Make Clean Sweep 89 KRC Electric Fly! Saturday Sunday September 16 17 10th annual KRC Electric Fly held Quakertown PA year two different types endurance events held Saturday Sunday Although weather miserable Saturday up last down event held 12 contestants participated four top finishers using SR packs First place won using SR 1250 Series Magnum pack second place won using SR 1250 Series Magnum pack third place won using SR 1800 Series Magnum pack fourth place won using SR 900 Series Max pack Sunday weather much better different type endurance event held Instead simply longest possible flight contestant made series 4 minute flights 2 minute period between flights retrieve planes allowed recharge change battery packs between flights contestant logged highest number 4 minute flights plus number seconds last flight won objective minimize affect thermals outcome event again SR Battery packs made clean sweep event First place won using SR 1250 Series Magnum pack second place won using SR 1000 Series Max pack third place won using SR 1250 Series Magnum pack As can see comes Electric Power battery packs SR Packs cant beat Two years ago SR recognized need series cells designed exclusively electric flier new series would have give electric fliers longest possible motor runs lowest possible weight new SR Magnum Series cells outgrowth research development Magnum Series cells pack 40% 50% capacity cell increasing its size weight Magnum cells primarily designed Sport applications maximum current load 12 15 amps intermittent applications SRs EP Max Pack Cells other hand designed lowest possible internal impedance could handle extremely high current loads continuous discharge rates 15 30 amps SR Max Pack cells best choice rather Magnum cells addition Electric Flight battery packs SR now Stop source Electric Flight supplies SR now stocks motors props chargers wire connectors switches just about anything else might need Electric Flight addition everyone SR will too happy answer questions help solve problems might have place order ask question can reach us calling Hotline 516-286-0079 between 9am 5pm Monday through Friday youd like us send literature send self addressed business size envelope 50 cents postage SR Batteries Inc Box 287 Bellport NY 11713 -ADVERTISEMENTsame principle involved Now area mean aerodynamic chord aerodynamic center location weird wing have determined can treated like ordinary wing calculation proper center-of-gravity location equation presented July 1988 column can used distance between aerodynamic centers wing horizontal stabilizer L well half horizontal stabilizer area ST two additional items must com puted order determine center-ofgravity should located aft wing aerody namic center equation used Equation 5 same equation July 1988 column Note Since found area mean aerodynamic chord aerodynamic center wing panel side air plane must use half horizontal sta bilizer area want use total stabilizer area double area wing panel just computed Got Next month plan discuss possible expedi tious way handling competition rule changes guarantee wont boring RC Giant Scale/de Vries Continued page 53 Five flight stations provided well covered pit area As usual safe flying name game werent midairs spectators well behind flight line According Bob lots Cubs P-47s P-51s well exotic models latter included all-metal 32lb beauty several twin-engined gas burners Sorry dont have photos big bash therell extensive coverage IMAAs High Flight sure Don Berliner aviation historian par excellence has advised us new organization devoted air racing history Its Society Air Racing Historians based Ohio correspondent has submitted application membership will pass along appropriate address other data know bit about organi zation What weve seen far looks very prom ising indeed As noted earlier column weve received Bert Thompsons quarter-scale drawings Benny Howards Ike Construction has begun sporty wheel pants Theyre 11 long holds two three-inch wheels along beam mechanism will keep everything aligned both air ground some very tricky wire bending involved comes landing gear struts lower ends soldered together along section big safety pin acts spring streamline pants airflow Next agenda make fiberglass cowl rest bird standard construction should breeze Fred Wallman process moving Minnesota retirement home Mesa AZ Before left northern climes assembled Ryan B-S photo session Hes bit ahead yours trulyhe has scale engine place wing struts assembled Ah wing leading edges finished Prolific model designer Don Neill 1120 So 40th St Lincoln NE 68510 has responded very positive way call Giant version Rudy Klings Folkerts SK-3 Actually Don way ahead comment Hes already fly ing prototype model Span model 66 fuselage 87 long Power new A&M Sachs 32 Don promises draw ings will available hes going install retracts Dennis Crooks has 1990 RC Scale Aircraft calendar ready Its another gemfantastic color photography want keep track days 90 contact DC Aviation PO Box 98 Big Rock IL 60511 Dennis will customize calendars club other organization takes credit cards Heres unabashed plug ViP Publishers Inc Dick Phillips yours trulys company now has Henry Haffkes masterful history Gran yule Brothers Gee Bee airplanes print title book Gee Bee REAL Story Granville Brothers Amazing Air planes Its first time author has co operation Granville family producing book about Thompson Trophy-winning rac ers early Thirties Bob Benjamin provided cover painting three- five-view drawings Gee Bee airplanes included soft-backed book Englands Harry Robinson US s Bill Hannan Henry located host photo graphs published before singu lar epic Henry Vein Clemens Williams Bros have published great Giant Scale drawings Gee Bee line aircraft book will come prime documentation source big-bird modelers Price Haffkes opus $2495 plus $200 P&H ViP Publishers Inc PO Box 16103 Colorado Springs CO 80935 December 1989 157
Edition: Model Aviation - 1989/12
Page Numbers: 52, 53, 157
THE SNOW should soon swirling over landits beginning building season Hope have xour Giant Scale project ready go lot has happened during past months hi atus Thus months column will pot pourri things have occurred Giant Scale arena interim best news Quadra fans among us Al Scott Scotts Airplane Co Rt #1 Neode sha KS 66757 now US Quadra Al bought out good friend Dario Brisighella now prime source Quadra bits pieces Another good friend Klaus Nowak has ac quired dies facilities people will soon hasnt already manufacturing Quadra engines produc tion Quadra engines very iffy thing manufacturer Canada went bankrupt future popular engine looked dim Things now considerably brighter incidentally Dario 1032 E Manitowoc Ave Oak Creek WI 53154 still selling magnificent Giant Scale drawings Waco ARE Starduster et al Mix match Herb Heaton still providing teresting copy remember discussion Herbs problems Giant model al lost second flight noise filters aileron circuit didnt function cause poor solder connection Two addi tional difficulties have plagued him same photo left 10-year-old Mike Selvenis used family Sopwith Pup trainer learn fly RC dad Dave drew plans built model photo right Fred Wallmans assembled Ryan B-S before recent move Arizona Quarter-scale bird spans 126 Author John de Vries also building about same stage completion Freds dummy engine really looks great Giant Scale models small Golden Age air racers turn out small too Don Neills Folkerts SK-3 L case point spans mere 66 Sachs 32 powers 23-lb craft Dons going Install retracts offer plans sale John Lanes Northville Ml Luscombe R incor porates features several 8A-8E series full-scale aircraft An OS 120 four-stroke powers 85-in-span Giant Plans derived doubling size Cleveland 43-in-span Free Flight kit Model weighs 13 lb uses 2 aileron servos handmade fiberglass cowl 52 Model Aviation Radio Control Giant Scale John de Vries Colonel USAF Ret 4610 Moffat Ln Colorado Springs CO 80915 John Pattons Phoenix AZ beautiful 12-lb Waco Pica kit Power provided Ma loney 125 made model License numbers Vinylwrite Custom Lettering bird airborne very hot day last sum mer iron-on covering began coming off wing talking about big hunks course didnt lot good models aerodynamicswith expected results great skill cunning Herb able get bird ground what found bonechilling Herb used two kinds plastic covering model high-temperature film other low-temperature film used trim hot day caused separate postmortem also revealed eleva tors both full-up position locked way Explanation latter phenomenon easy Hed used servo wheels manu facturer other built ser vos Although wheels apparently fit ser vos perfectly under no-load condition wasnt really case airloads ap plied almost-undetectable misfit tween servos square drive studs square recesses output wheels Airloads during flight allowed studs rotate within recesses jam elevators Moral partic ularly careful mix n match bits pieces building Giant Murphys Law lies wait careless kids taking overand happily About four years ago Dave Selvenis Oly phant PA drew set plans Giant Sopwith Pup son Mike six years old time four years ago interim Mike learned fly RC using Pup trainer Hes sticks 90% time according Dave Now 10 Mike mild aerobatics has talked dad building Bob Nelitzs A-scale Cub sure could use thousands Mike Selvenises Doe again Recently Doe Pepino ac quired Pat Pattisons -scale draw ings 1930 Lincoln Sport biplane birds stick-for-stick re-creation original bird plans magnificent Prices $2795 A-scale $2995 -scale youre interested Doe Pepinos address Scale Plans Photo Service 3209 Madison Ave Greensboro NC 27403 Hes also published new photo-pack drawings listing $4 US $6 overseas Thanks Bob Eson Dawn Patrol Chapter 90 IMAA hear 1989 Rally Giants Odessa TX spectacular success over 400 models 289 fliers big IMAA festival lived up its advance publicity West Texas Magnum Squadron Chapter 172 Odessa Prop Busters RC Club put get-together drew modelers far nearContinued page 157 sSAYAJITIHI ZZIDUDWNZZDD 7sss sin Gsre sod cdero c 422 4561717 December 1989 53 bones Pat Pattisons -scale 1930 Lincoln Sport biplane Drawings avail able Doc Pepino details column LINE METAL SPECIALISTS u LINE OF QUADRA ENGINES PARTS ACCESSORIES UPERTANKS& SUPERMUFFLERS FULLLINEOFZINGER WOOD PROPS oGIANT SCALE R/C PLANS SEND $1 FOR COMPLETE CATALOG TO DEALERALLEN SCOlT QUADRA ]NVLTIEDLUJ RT 1 NEODESHA KS 66757 25-2821 $475 $475AVAILABLE AT AMERICAS a/s TRIBUTED BY FINEST HOBBY SHOPS SR Battery Packs Make Clean Sweep 89 KRC Electric Fly! Saturday Sunday September 16 17 10th annual KRC Electric Fly held Quakertown PA year two different types endurance events held Saturday Sunday Although weather miserable Saturday up last down event held 12 contestants participated four top finishers using SR packs First place won using SR 1250 Series Magnum pack second place won using SR 1250 Series Magnum pack third place won using SR 1800 Series Magnum pack fourth place won using SR 900 Series Max pack Sunday weather much better different type endurance event held Instead simply longest possible flight contestant made series 4 minute flights 2 minute period between flights retrieve planes allowed recharge change battery packs between flights contestant logged highest number 4 minute flights plus number seconds last flight won objective minimize affect thermals outcome event again SR Battery packs made clean sweep event First place won using SR 1250 Series Magnum pack second place won using SR 1000 Series Max pack third place won using SR 1250 Series Magnum pack As can see comes Electric Power battery packs SR Packs cant beat Two years ago SR recognized need series cells designed exclusively electric flier new series would have give electric fliers longest possible motor runs lowest possible weight new SR Magnum Series cells outgrowth research development Magnum Series cells pack 40% 50% capacity cell increasing its size weight Magnum cells primarily designed Sport applications maximum current load 12 15 amps intermittent applications SRs EP Max Pack Cells other hand designed lowest possible internal impedance could handle extremely high current loads continuous discharge rates 15 30 amps SR Max Pack cells best choice rather Magnum cells addition Electric Flight battery packs SR now Stop source Electric Flight supplies SR now stocks motors props chargers wire connectors switches just about anything else might need Electric Flight addition everyone SR will too happy answer questions help solve problems might have place order ask question can reach us calling Hotline 516-286-0079 between 9am 5pm Monday through Friday youd like us send literature send self addressed business size envelope 50 cents postage SR Batteries Inc Box 287 Bellport NY 11713 -ADVERTISEMENTsame principle involved Now area mean aerodynamic chord aerodynamic center location weird wing have determined can treated like ordinary wing calculation proper center-of-gravity location equation presented July 1988 column can used distance between aerodynamic centers wing horizontal stabilizer L well half horizontal stabilizer area ST two additional items must com puted order determine center-ofgravity should located aft wing aerody namic center equation used Equation 5 same equation July 1988 column Note Since found area mean aerodynamic chord aerodynamic center wing panel side air plane must use half horizontal sta bilizer area want use total stabilizer area double area wing panel just computed Got Next month plan discuss possible expedi tious way handling competition rule changes guarantee wont boring RC Giant Scale/de Vries Continued page 53 Five flight stations provided well covered pit area As usual safe flying name game werent midairs spectators well behind flight line According Bob lots Cubs P-47s P-51s well exotic models latter included all-metal 32lb beauty several twin-engined gas burners Sorry dont have photos big bash therell extensive coverage IMAAs High Flight sure Don Berliner aviation historian par excellence has advised us new organization devoted air racing history Its Society Air Racing Historians based Ohio correspondent has submitted application membership will pass along appropriate address other data know bit about organi zation What weve seen far looks very prom ising indeed As noted earlier column weve received Bert Thompsons quarter-scale drawings Benny Howards Ike Construction has begun sporty wheel pants Theyre 11 long holds two three-inch wheels along beam mechanism will keep everything aligned both air ground some very tricky wire bending involved comes landing gear struts lower ends soldered together along section big safety pin acts spring streamline pants airflow Next agenda make fiberglass cowl rest bird standard construction should breeze Fred Wallman process moving Minnesota retirement home Mesa AZ Before left northern climes assembled Ryan B-S photo session Hes bit ahead yours trulyhe has scale engine place wing struts assembled Ah wing leading edges finished Prolific model designer Don Neill 1120 So 40th St Lincoln NE 68510 has responded very positive way call Giant version Rudy Klings Folkerts SK-3 Actually Don way ahead comment Hes already fly ing prototype model Span model 66 fuselage 87 long Power new A&M Sachs 32 Don promises draw ings will available hes going install retracts Dennis Crooks has 1990 RC Scale Aircraft calendar ready Its another gemfantastic color photography want keep track days 90 contact DC Aviation PO Box 98 Big Rock IL 60511 Dennis will customize calendars club other organization takes credit cards Heres unabashed plug ViP Publishers Inc Dick Phillips yours trulys company now has Henry Haffkes masterful history Gran yule Brothers Gee Bee airplanes print title book Gee Bee REAL Story Granville Brothers Amazing Air planes Its first time author has co operation Granville family producing book about Thompson Trophy-winning rac ers early Thirties Bob Benjamin provided cover painting three- five-view drawings Gee Bee airplanes included soft-backed book Englands Harry Robinson US s Bill Hannan Henry located host photo graphs published before singu lar epic Henry Vein Clemens Williams Bros have published great Giant Scale drawings Gee Bee line aircraft book will come prime documentation source big-bird modelers Price Haffkes opus $2495 plus $200 P&H ViP Publishers Inc PO Box 16103 Colorado Springs CO 80935 December 1989 157
Edition: Model Aviation - 1989/12
Page Numbers: 52, 53, 157
THE SNOW should soon swirling over landits beginning building season Hope have xour Giant Scale project ready go lot has happened during past months hi atus Thus months column will pot pourri things have occurred Giant Scale arena interim best news Quadra fans among us Al Scott Scotts Airplane Co Rt #1 Neode sha KS 66757 now US Quadra Al bought out good friend Dario Brisighella now prime source Quadra bits pieces Another good friend Klaus Nowak has ac quired dies facilities people will soon hasnt already manufacturing Quadra engines produc tion Quadra engines very iffy thing manufacturer Canada went bankrupt future popular engine looked dim Things now considerably brighter incidentally Dario 1032 E Manitowoc Ave Oak Creek WI 53154 still selling magnificent Giant Scale drawings Waco ARE Starduster et al Mix match Herb Heaton still providing teresting copy remember discussion Herbs problems Giant model al lost second flight noise filters aileron circuit didnt function cause poor solder connection Two addi tional difficulties have plagued him same photo left 10-year-old Mike Selvenis used family Sopwith Pup trainer learn fly RC dad Dave drew plans built model photo right Fred Wallmans assembled Ryan B-S before recent move Arizona Quarter-scale bird spans 126 Author John de Vries also building about same stage completion Freds dummy engine really looks great Giant Scale models small Golden Age air racers turn out small too Don Neills Folkerts SK-3 L case point spans mere 66 Sachs 32 powers 23-lb craft Dons going Install retracts offer plans sale John Lanes Northville Ml Luscombe R incor porates features several 8A-8E series full-scale aircraft An OS 120 four-stroke powers 85-in-span Giant Plans derived doubling size Cleveland 43-in-span Free Flight kit Model weighs 13 lb uses 2 aileron servos handmade fiberglass cowl 52 Model Aviation Radio Control Giant Scale John de Vries Colonel USAF Ret 4610 Moffat Ln Colorado Springs CO 80915 John Pattons Phoenix AZ beautiful 12-lb Waco Pica kit Power provided Ma loney 125 made model License numbers Vinylwrite Custom Lettering bird airborne very hot day last sum mer iron-on covering began coming off wing talking about big hunks course didnt lot good models aerodynamicswith expected results great skill cunning Herb able get bird ground what found bonechilling Herb used two kinds plastic covering model high-temperature film other low-temperature film used trim hot day caused separate postmortem also revealed eleva tors both full-up position locked way Explanation latter phenomenon easy Hed used servo wheels manu facturer other built ser vos Although wheels apparently fit ser vos perfectly under no-load condition wasnt really case airloads ap plied almost-undetectable misfit tween servos square drive studs square recesses output wheels Airloads during flight allowed studs rotate within recesses jam elevators Moral partic ularly careful mix n match bits pieces building Giant Murphys Law lies wait careless kids taking overand happily About four years ago Dave Selvenis Oly phant PA drew set plans Giant Sopwith Pup son Mike six years old time four years ago interim Mike learned fly RC using Pup trainer Hes sticks 90% time according Dave Now 10 Mike mild aerobatics has talked dad building Bob Nelitzs A-scale Cub sure could use thousands Mike Selvenises Doe again Recently Doe Pepino ac quired Pat Pattisons -scale draw ings 1930 Lincoln Sport biplane birds stick-for-stick re-creation original bird plans magnificent Prices $2795 A-scale $2995 -scale youre interested Doe Pepinos address Scale Plans Photo Service 3209 Madison Ave Greensboro NC 27403 Hes also published new photo-pack drawings listing $4 US $6 overseas Thanks Bob Eson Dawn Patrol Chapter 90 IMAA hear 1989 Rally Giants Odessa TX spectacular success over 400 models 289 fliers big IMAA festival lived up its advance publicity West Texas Magnum Squadron Chapter 172 Odessa Prop Busters RC Club put get-together drew modelers far nearContinued page 157 sSAYAJITIHI ZZIDUDWNZZDD 7sss sin Gsre sod cdero c 422 4561717 December 1989 53 bones Pat Pattisons -scale 1930 Lincoln Sport biplane Drawings avail able Doc Pepino details column LINE METAL SPECIALISTS u LINE OF QUADRA ENGINES PARTS ACCESSORIES UPERTANKS& SUPERMUFFLERS FULLLINEOFZINGER WOOD PROPS oGIANT SCALE R/C PLANS SEND $1 FOR COMPLETE CATALOG TO DEALERALLEN SCOlT QUADRA ]NVLTIEDLUJ RT 1 NEODESHA KS 66757 25-2821 $475 $475AVAILABLE AT AMERICAS a/s TRIBUTED BY FINEST HOBBY SHOPS SR Battery Packs Make Clean Sweep 89 KRC Electric Fly! Saturday Sunday September 16 17 10th annual KRC Electric Fly held Quakertown PA year two different types endurance events held Saturday Sunday Although weather miserable Saturday up last down event held 12 contestants participated four top finishers using SR packs First place won using SR 1250 Series Magnum pack second place won using SR 1250 Series Magnum pack third place won using SR 1800 Series Magnum pack fourth place won using SR 900 Series Max pack Sunday weather much better different type endurance event held Instead simply longest possible flight contestant made series 4 minute flights 2 minute period between flights retrieve planes allowed recharge change battery packs between flights contestant logged highest number 4 minute flights plus number seconds last flight won objective minimize affect thermals outcome event again SR Battery packs made clean sweep event First place won using SR 1250 Series Magnum pack second place won using SR 1000 Series Max pack third place won using SR 1250 Series Magnum pack As can see comes Electric Power battery packs SR Packs cant beat Two years ago SR recognized need series cells designed exclusively electric flier new series would have give electric fliers longest possible motor runs lowest possible weight new SR Magnum Series cells outgrowth research development Magnum Series cells pack 40% 50% capacity cell increasing its size weight Magnum cells primarily designed Sport applications maximum current load 12 15 amps intermittent applications SRs EP Max Pack Cells other hand designed lowest possible internal impedance could handle extremely high current loads continuous discharge rates 15 30 amps SR Max Pack cells best choice rather Magnum cells addition Electric Flight battery packs SR now Stop source Electric Flight supplies SR now stocks motors props chargers wire connectors switches just about anything else might need Electric Flight addition everyone SR will too happy answer questions help solve problems might have place order ask question can reach us calling Hotline 516-286-0079 between 9am 5pm Monday through Friday youd like us send literature send self addressed business size envelope 50 cents postage SR Batteries Inc Box 287 Bellport NY 11713 -ADVERTISEMENTsame principle involved Now area mean aerodynamic chord aerodynamic center location weird wing have determined can treated like ordinary wing calculation proper center-of-gravity location equation presented July 1988 column can used distance between aerodynamic centers wing horizontal stabilizer L well half horizontal stabilizer area ST two additional items must com puted order determine center-ofgravity should located aft wing aerody namic center equation used Equation 5 same equation July 1988 column Note Since found area mean aerodynamic chord aerodynamic center wing panel side air plane must use half horizontal sta bilizer area want use total stabilizer area double area wing panel just computed Got Next month plan discuss possible expedi tious way handling competition rule changes guarantee wont boring RC Giant Scale/de Vries Continued page 53 Five flight stations provided well covered pit area As usual safe flying name game werent midairs spectators well behind flight line According Bob lots Cubs P-47s P-51s well exotic models latter included all-metal 32lb beauty several twin-engined gas burners Sorry dont have photos big bash therell extensive coverage IMAAs High Flight sure Don Berliner aviation historian par excellence has advised us new organization devoted air racing history Its Society Air Racing Historians based Ohio correspondent has submitted application membership will pass along appropriate address other data know bit about organi zation What weve seen far looks very prom ising indeed As noted earlier column weve received Bert Thompsons quarter-scale drawings Benny Howards Ike Construction has begun sporty wheel pants Theyre 11 long holds two three-inch wheels along beam mechanism will keep everything aligned both air ground some very tricky wire bending involved comes landing gear struts lower ends soldered together along section big safety pin acts spring streamline pants airflow Next agenda make fiberglass cowl rest bird standard construction should breeze Fred Wallman process moving Minnesota retirement home Mesa AZ Before left northern climes assembled Ryan B-S photo session Hes bit ahead yours trulyhe has scale engine place wing struts assembled Ah wing leading edges finished Prolific model designer Don Neill 1120 So 40th St Lincoln NE 68510 has responded very positive way call Giant version Rudy Klings Folkerts SK-3 Actually Don way ahead comment Hes already fly ing prototype model Span model 66 fuselage 87 long Power new A&M Sachs 32 Don promises draw ings will available hes going install retracts Dennis Crooks has 1990 RC Scale Aircraft calendar ready Its another gemfantastic color photography want keep track days 90 contact DC Aviation PO Box 98 Big Rock IL 60511 Dennis will customize calendars club other organization takes credit cards Heres unabashed plug ViP Publishers Inc Dick Phillips yours trulys company now has Henry Haffkes masterful history Gran yule Brothers Gee Bee airplanes print title book Gee Bee REAL Story Granville Brothers Amazing Air planes Its first time author has co operation Granville family producing book about Thompson Trophy-winning rac ers early Thirties Bob Benjamin provided cover painting three- five-view drawings Gee Bee airplanes included soft-backed book Englands Harry Robinson US s Bill Hannan Henry located host photo graphs published before singu lar epic Henry Vein Clemens Williams Bros have published great Giant Scale drawings Gee Bee line aircraft book will come prime documentation source big-bird modelers Price Haffkes opus $2495 plus $200 P&H ViP Publishers Inc PO Box 16103 Colorado Springs CO 80935 December 1989 157