Radio Control Giant Scale Bob Beckman SPARROWHAWK WINGS letters Ive received response Sparrowhawk articles have compli mentary Im happy able report roses far outnumber brickbats though since people likely take trouble write letter unhappy about some thing figure Im way ahead game brickbats part friendly intent such letter took exception some statements made describing decided build Sparrowhawk commented fact few modelers have taken F9C-2 subject though contemporary ofand just colorful asthe P6-E went say difficult subject both building flying standpoint Gull wingroots extensive complicated strut fairings short nose moment just few factors involved addition made comment about uncertain flight characteristics new modeling friend really objected Im going use some comments help illus trate little what went through selecting Sparrowhawk designing its wing construction First commented fact built rubber-powered models Sparrowhawk Thirties made some rather derisive remarks about modern breed modeler would worry about flight characteristics such fine design comment about strut fairings countered observation respect Sparrowhawk no worse other aircraft whats hard about strut fairings anyway finally pointed out gull center-sections advanta geous since upper wing could built piece attached cabane struts final illuminating comment effect since wasnt Giant Scale builder maybe didnt really appreciate problems having build airplanes come apart can get car Well modicum difference between small lightweight rubberpowered model 20-pound A-scale model both based same aircraft can equally challenging equally rewarding problems involved different example lets look matter fillets 20 strut fairings Sparrowhawk no two identi cal small model some can omitted lack being notice able Others can simply silhouettes maybe carved balsa pieces added side Since model doesnt break apart intentionally whole process relatively simple though tedious Now look quarter-scale version Just because size fillets have finished product wont look right Im talking about museum scale just want mod el reasonably realistic Next fillets have removable Well wings have come off transportation means struts have come off fillets cover attachment points struts case landing gear probably wont take off transportation have able case damage must repaired again fillets cover attachment points Wing structure details Bobs Sparrowhawk left upper wing panel retained spring-loaded watchband pin Note heavy plywood fuselage bulkheads carry loads plus sturdy wing-spar brackets right typical detail wing strut f ting flying-wIre retainer block buried spar aluminum eyeboit threads strut will attach eyeboit other block brass flying wires wIll brazed Machine screws anchor block spar block 48 Model Aviation Giant Scale models structure similar toyet quite unlike ordinary models difference Parts generally bigger must carry larger loads parts top wing Bobs Sparrowhawk left foam-core ribs hardwood spars aluminum-tube leading edge laminated balsa tipsthe balsa wing Ribs top aluminum templates Hawks lower wing R shown jigupside down because required negative dihedral its spars will soon boxed A2ln plywood strength fillets themselves have light weight dont want 20-pound air plane five pounds fillets decided vacuum-form out sheet styrene means Im going have carve 20 plugs since some fillets will have two pieces will easy replace damaged ones later Now see listed fillets possible reason Sparrowhawk common model agree friendly critic about advantages gull wing reasons picked Sparrowhawk first place love biplanes hate cabane struts However never con sidered making upper wing piece though -scale its bit over six feet span Right start planned two panels attached fuselage gull section scale hinge points photos shows solu tion attachment problem springloaded pin like overgrown watchband pin holds wing panel fuselage course struts flying wires have functional since ornithopter lower wing piece though original two panels tached same manner upper wing thinking would need access radio gear anyway might well mount lower wing like conventional low-wing RC model As turns out am going need access through removable skin panels up per center section anyway could have made lower wing two panels Im too far along change now though Construction both wings pretty con ventional some unconventional materials places Six years ago started whole thing hadnt heard read anything about foam core board modeling run across some decided would make good wing ribs some aluminum tubing matched radius airfoil leading edge sheet aluminum used litho plates will cover area leading edge front spar Front rear spars scale locations -in square spruce set notches top bottom ribs made box spar As-in plywood side between ribs Trailing edges three layers Y-in plywood laminated epoxy rigidi ty balsa wings tips laminated A-in strips like build wings Adjusto-Jig Continued page 137 Small Tool opecialists SUMMER SALE CATALOG SAVINGS OF UP TO 50% famous-make tools accessories hard-to-find items FREE GIFTS valued $1495 older direct us mail OVER 1000 ITEMS fully guaranteed MICRO-MARK 5112-79 24 E Main St Clinton NJ 08809 E YES Please RUSH new catalog ordered us before no need mail ~upon Well send new catalog automatically NAME ADDRESS ICITY _______ _____ STATE ____________________ ZIP _____________ m -Fl 2 -I m -Fl C 2 C4 -I m U -I C 2 July1985 49 wing landing gear struts Sparrowhawk will require falrlngs20 no two Identicat Bob plans vacuum-form thin plastic photo taken before upper left wing panel built shows strutlfiylna wire arrangement LEARN TO FLY Beginners start Out right pro fessional comprehensive training foundimentals covered BasictTraint door & Out entire solo much BE INNERS PAC GE OFFER VIDEO PROGRAMS VHS& BETAS oai PROGRAM LISTINGSC 1BASIC CONSTRUCTION FOR BEGINNERS IN RIC107 Mm 4096 .J 2BASIC FUGNTTMAINING FOR BEGINNERS IN RIC65 Mm 4406 esaloasi foigfOIy detailed stspbyetep instruction Z a 3THE WORLD OF MODEL AVIATION90 Mm 4496eZ Expos Scale meets AMA Nets & 4OSHKOSH OVERVIEW56 Mm 3096 Workshops Foroims Tours AerobatIcs Warblrds & MoreAll 5AIRPLANE FIJNNIES Ifl 3006 Rentals MU See friends others goofing wildest video ever 6US SCALE MASTERS CHAMPIONSHIPS60 MIII 3096Si 495 best scale models pilots competIng top honors 7WARBIROS IN ACTIoN75 MIn 49 OBDERDIG INPOUNAflON Please Read CaeAaUv Avosi al Af sales final RENTAL DEPOSIT full purchase price EACH program ordered difference refunded RENTAL DURATION 1 week after delivery Reserved dates reguire 15 day notice PAYMENT Check 10 day clearance money order Sorry no Visa etc CODs available phone SHIPPING 5375Forelgn Canada add 10% TOTAL others add 15% IL res add 8% tea -SEND GUDERS TO ACAOEMY OF AVIATION RESEARCH & DEVELOPMENT OX 426139 AGO IL 60642 call pizi 4440S 10 am4 pm Man thru SaL fourth equation doing arithmetic serious Electric flier will eventually realize value such measurement ca pability will probably wind up owning least such instrument choices varied mini senes continues well see some features available used readers may familiar other terms RC experience such milliamperes Lets stop square away confusion may come about sort thing basic electrical terms given above several prefixes routinely used make life easier example milliampere 1/1000 ampere Its much easier say one-thousandth ampere prefixes may have heard have scale size commonly used prefixes applicable volts amps ohms micro means 1/1000000 of. milli means 1/1000 of. kilo means 1000 times. mega means 1000000 times. other prefixes like pico nano giga etc often show up hobby usage worked power company youd probably hear expressions like kilovolts megawatts mean thousands volts millions watts respectively Thus common power line voltage parts country 12 Ky 12000 volt line Part city may demand some number MW millions watts see what have sort jargon really abbreviated way talking writing Its easier may offer some initial confusion its much better long run use such expressions looked inside common receivers servos transmitters would find essentially resistors used ranged value few tens ohms about megohm Most would fall between few hundred ohms few hundred thousand ohms would find course could read color codes painted resistor bodies put Electric components ballpark batteries motors fall four 20 volts range motors suitable props draw five 25 amps majority fall six 16 volt 10 15 amp ranges Thus taking limit numbers end find motor input power levels fall between 20 watts very small 500 watts big common ly used ones fall range 60 watts 250 watts Right now everything have flying five planes falls latter range Fornow please forward questions comments SASE please author Happy Electric Landings Parts List parts numbers modifi cation Radio Shack Voltage Inverter described last months column advertantly omitted Refer photo lower riglst corner page 53 June 1985 issue terminal strip cut-down five-lug unit Radio Shack part No 274-688 two 50-volt three amp rectifier diodes Radio Shack part No 276-1141 note direction black-banded end 220 microfarad electrolytic capacitor Radio Shack part No 272-1017 negative lead goes terminal strip Electric event SAM 76s annual Old-Timer meet scheduled July 14 1985 will have added Electric event first time Its no-rules well almost thing wherein requirement model legal Antique Old-Timer design Any electric power system permissible further de tails contact Contest Director Ralph Riddle 2156 Street Rd Warrington PA 18976 Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giht Scale/Beckman Continued page 49 its usually too small Giant Scale models case able build upper panels time complete lower wing just barely fit Sparrowhawk small airplane A-scale lower span less six feet put lower wing jig up side down because has degree negative dihedral As mentioned above wings struts flying wires have removable functional addition struts wires need adjustable struts made aluminum tubing will have spruce strips added bring scale size struts attached machine screws eyebolts wings eyebolts threaded aluminum blocks buried spars running eyebolts out effective length struts can adjusted flying wires made eighth-inch electricians fish tape piece spring steel wire 1-in wide about Y64-in thick available 50- Continued page 140 H ben Old Timer 7ka foam J4o4LL 4/ LMEZOS8 tea Mesa tOot BROOKLYN DODGER 56 Cabin'NEWEST Retail $52 95INTRODUCTORY PRICE $3900 t935 Record Breaker 96 $0956 ls39Zippertf$5356 1938 Kloud KIng 63 $0230 1901 Brigidier 56 $0070 toOl Super Quaker 79 $7276 1940 So Long S0$3036 t$36 Buccaneer 04 $0996 1930 Clipper MKI 72$4156 t937 Dallaire 100 $7516 1035 MIss America 89 $7190 1941 Playboy Sr 50 $5116 1991 Playboy Jr 54 $3116 1938 Powerhouse 54 $53 56 1990 Sailplane 78 $8476 1938 Trenton Terror 12 $4076 1940 Ranger 46$3196 1939 Korda Wake 44 $1916 lO3OAiercury 72 6 kits qualify SAM events FF & R/C feature highest quality machine cut & sanded parts Superior atl Competition sheet strip wood wire & window material Plane orig FE models easily convertible Sch R/C KlTS Sailpianes Electric power Gas Hobby Horn SENSOAR Glidgr 78 5s $1800 Midway Model GNOME R/C Hand Launch Glider$2000 Jolly Models FLINCER R/C HLG 55 Span $2900 Midway Model FAST EDDIE Aerobatic /55 Elec$1900 Jolly Models ELECTRICUS Electric Clider 05a$3250 Leisure PLAYBOY SR 97 Gear 00 Elect $3000 stro ASTRO SPORT 37 Direct 05 Elect$2250 Leisure WASP 37 Direct 05 Electrics $2250 Midway ULTRA MK IV 06 Geared EP $3900 Midway FLYING QUAKER 80 00-454 stroke $6479 4kslMidway DENNY JR 72 Alum Cowel $6396 ptwiTizrNrUFrEErTR1csySTEMWtPIrts Avail SKIPPING & HANDLING 64 Page CATALOGUE Up $800 add $150$200 PP/tat Class $801 $2000 add $225A copy wilt lie sent $2001 $4500 add $300 freewhen requested$4501 $7000 add $350to over $7000 add $400HOBBY HORN CA Addressees add 6% tea15173 Moran St IA Send MO VisaIMCIFEapIPO Box 2212 Check tallow up tO 30Westminster Ca 92600 days CK clearance 1714 8938311 COD Exact Charges plus $150 Hdl iCash OnlylfAft Hrs 1714 89513031 July1985 ii SUPER HAWK FLY MAX relaxing change pace build SUPER HAWK rubber model 1 hour plus glue drying time Show beginner magic thermal flights clubs next picnic funfly try SUPER HAWK contest 15 Wingspan 20 Length Promotional price $1495 plus $165 ahipping US number Write group discount 12 kits Send check money order No COD credit cards Dealers distrib utors please write letterhead standard discount quantities FLY MAX 1i129A Fox Dale ey Ohio 45365 RC Giant Scale/Beckman Continued page 137 100-foot lengths Although exactly scale size its close enough pur poses Pairs wires brazed brass blocks blocks attached wings machine screws same aluminum blocks hold strutattachment eyebolts fuselage ends wires brazed threaded studs secured nuts side metal fuselage fitting Running nuts back forth stud provides adjustment wire tension As uncertain flight characteris tics arent us old fogies around building fly ing models Thirties learned basic design skills relatively inex pensive models Giant Scale aircraft big investment both time money Most todays RC modelers have no real background aerodynamics aeronau tical engineering applied models Theres no reason should excellent kits plans available As result small percentage active modelers actually real design work didnt consider flight charac teristics Sparrowhawk particularly uncertain wouldnt have started first place other hand know no including myself has flown RC version F9C-2 Now Ive said rate Im go ing will dozens air before get finished Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 RC Pylon Racing/Hager Continued page 50 launched fliers airplanes feet firmly planted airplane antenna Thanks go out UPRC clubs races put workers Without wouldnt UPR Circuit Bruce Knox needs mentioned matrix did races bringing out workers cages others too numer ous mention Contestants should always appreciate time efforts contest officials ask nothing return make modeling Racing much enjoyable examples follow North Central Pylon League reports last race 1984 season last race year saw 16 fliers competing honors Grassfield site whole weekend cloudy threat ening rain did Sunday No records broken probably due heavily overcast skies first days race very few record no crashes Sixteen flierswith 16 planesstarted finished way exciting race probably sixth round Bednark Brue shaber up Jerry Bednark right Dougs tail throughout race Doug time 1286 Jerry finished 16 seconds behind 1290 Some new faces appeared racing meet Larry Rosine Larry Riehl Charles Eldridge first days results two classes QSOO Expert class 1 Dennis Hoffman 22 pt1257 2 Doug Brue shaber 20 pt1266 3 Jerry Bednark 19 ptl290 4 Roger Wilson 19 pt1311 5 Jerry Elert 16 pt 1341 Standard class 1 Charles Eldridge 18 pt1435 2 Phil Zuidema 15 pt1334 3 Ronald Edgar 14 pt 1492 4 David Rech 14 pt1535 5 Rick Mercier 11 pt1446 Sunday rains poured poured Contest Director make de cision after some thought made decision race rains finally quit flew Saturday race finished Sunday exactly opposite no-finishes cut outs no-starts crashes second days results two classes Quarter Midget six heats Expert class 1 Dennis Hoffman 20 pt 2 Daniel Norlin 18 pt 3 Roger Wilson 15 pt 4 Richard Steine 11 pt 5 Albert Schwartz 8 Pt Standard class 1 Ronald Gage 17 pt 2 Vic Leerhoff 16 pt 3 Boyd Bowdish 13 pt 4 Del Berryman 13 pt 5 Jerry Elert 12 Pt No times recorded QM races because lack manpower timing CD decided fly off tie between Bowdish Berryman have received several letters about airflow gauge wrote about April issue seems though several have tried some adding various features to improve way another Several suggested monitoring mo tors AC input will vary depending upon time day local usage important AC input main tained known level friend Fred French set up small motor/generator driven small prop end showed Ping Pong ball hooked ammeter worked very well Send hints ideas can pass Support Racing National Miniature Pylon Racing Association group modelers dedicated Pylon Racing NMPRA racing information join write Bruce Richmond 18816 Bilbrook Ln Dallas TX 75252 Annual dues $13 non-flying members $18 flying members See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 140 Model Aviation 4 S Flight TestedContest Proven Rhlnebeclc 82 Results CamelFirst lanes5 awards Scale 2 1 Engine 60 Send 75C latest price list & iiteature VK MODEL AIRCRAFT CO 6866 Transit Rd. Depew NV 14043 716 -684 5555
Edition: Model Aviation - 1985/07
Page Numbers: 48, 49, 137, 140
Radio Control Giant Scale Bob Beckman SPARROWHAWK WINGS letters Ive received response Sparrowhawk articles have compli mentary Im happy able report roses far outnumber brickbats though since people likely take trouble write letter unhappy about some thing figure Im way ahead game brickbats part friendly intent such letter took exception some statements made describing decided build Sparrowhawk commented fact few modelers have taken F9C-2 subject though contemporary ofand just colorful asthe P6-E went say difficult subject both building flying standpoint Gull wingroots extensive complicated strut fairings short nose moment just few factors involved addition made comment about uncertain flight characteristics new modeling friend really objected Im going use some comments help illus trate little what went through selecting Sparrowhawk designing its wing construction First commented fact built rubber-powered models Sparrowhawk Thirties made some rather derisive remarks about modern breed modeler would worry about flight characteristics such fine design comment about strut fairings countered observation respect Sparrowhawk no worse other aircraft whats hard about strut fairings anyway finally pointed out gull center-sections advanta geous since upper wing could built piece attached cabane struts final illuminating comment effect since wasnt Giant Scale builder maybe didnt really appreciate problems having build airplanes come apart can get car Well modicum difference between small lightweight rubberpowered model 20-pound A-scale model both based same aircraft can equally challenging equally rewarding problems involved different example lets look matter fillets 20 strut fairings Sparrowhawk no two identi cal small model some can omitted lack being notice able Others can simply silhouettes maybe carved balsa pieces added side Since model doesnt break apart intentionally whole process relatively simple though tedious Now look quarter-scale version Just because size fillets have finished product wont look right Im talking about museum scale just want mod el reasonably realistic Next fillets have removable Well wings have come off transportation means struts have come off fillets cover attachment points struts case landing gear probably wont take off transportation have able case damage must repaired again fillets cover attachment points Wing structure details Bobs Sparrowhawk left upper wing panel retained spring-loaded watchband pin Note heavy plywood fuselage bulkheads carry loads plus sturdy wing-spar brackets right typical detail wing strut f ting flying-wIre retainer block buried spar aluminum eyeboit threads strut will attach eyeboit other block brass flying wires wIll brazed Machine screws anchor block spar block 48 Model Aviation Giant Scale models structure similar toyet quite unlike ordinary models difference Parts generally bigger must carry larger loads parts top wing Bobs Sparrowhawk left foam-core ribs hardwood spars aluminum-tube leading edge laminated balsa tipsthe balsa wing Ribs top aluminum templates Hawks lower wing R shown jigupside down because required negative dihedral its spars will soon boxed A2ln plywood strength fillets themselves have light weight dont want 20-pound air plane five pounds fillets decided vacuum-form out sheet styrene means Im going have carve 20 plugs since some fillets will have two pieces will easy replace damaged ones later Now see listed fillets possible reason Sparrowhawk common model agree friendly critic about advantages gull wing reasons picked Sparrowhawk first place love biplanes hate cabane struts However never con sidered making upper wing piece though -scale its bit over six feet span Right start planned two panels attached fuselage gull section scale hinge points photos shows solu tion attachment problem springloaded pin like overgrown watchband pin holds wing panel fuselage course struts flying wires have functional since ornithopter lower wing piece though original two panels tached same manner upper wing thinking would need access radio gear anyway might well mount lower wing like conventional low-wing RC model As turns out am going need access through removable skin panels up per center section anyway could have made lower wing two panels Im too far along change now though Construction both wings pretty con ventional some unconventional materials places Six years ago started whole thing hadnt heard read anything about foam core board modeling run across some decided would make good wing ribs some aluminum tubing matched radius airfoil leading edge sheet aluminum used litho plates will cover area leading edge front spar Front rear spars scale locations -in square spruce set notches top bottom ribs made box spar As-in plywood side between ribs Trailing edges three layers Y-in plywood laminated epoxy rigidi ty balsa wings tips laminated A-in strips like build wings Adjusto-Jig Continued page 137 Small Tool opecialists SUMMER SALE CATALOG SAVINGS OF UP TO 50% famous-make tools accessories hard-to-find items FREE GIFTS valued $1495 older direct us mail OVER 1000 ITEMS fully guaranteed MICRO-MARK 5112-79 24 E Main St Clinton NJ 08809 E YES Please RUSH new catalog ordered us before no need mail ~upon Well send new catalog automatically NAME ADDRESS ICITY _______ _____ STATE ____________________ ZIP _____________ m -Fl 2 -I m -Fl C 2 C4 -I m U -I C 2 July1985 49 wing landing gear struts Sparrowhawk will require falrlngs20 no two Identicat Bob plans vacuum-form thin plastic photo taken before upper left wing panel built shows strutlfiylna wire arrangement LEARN TO FLY Beginners start Out right pro fessional comprehensive training foundimentals covered BasictTraint door & Out entire solo much BE INNERS PAC GE OFFER VIDEO PROGRAMS VHS& BETAS oai PROGRAM LISTINGSC 1BASIC CONSTRUCTION FOR BEGINNERS IN RIC107 Mm 4096 .J 2BASIC FUGNTTMAINING FOR BEGINNERS IN RIC65 Mm 4406 esaloasi foigfOIy detailed stspbyetep instruction Z a 3THE WORLD OF MODEL AVIATION90 Mm 4496eZ Expos Scale meets AMA Nets & 4OSHKOSH OVERVIEW56 Mm 3096 Workshops Foroims Tours AerobatIcs Warblrds & MoreAll 5AIRPLANE FIJNNIES Ifl 3006 Rentals MU See friends others goofing wildest video ever 6US SCALE MASTERS CHAMPIONSHIPS60 MIII 3096Si 495 best scale models pilots competIng top honors 7WARBIROS IN ACTIoN75 MIn 49 OBDERDIG INPOUNAflON Please Read CaeAaUv Avosi al Af sales final RENTAL DEPOSIT full purchase price EACH program ordered difference refunded RENTAL DURATION 1 week after delivery Reserved dates reguire 15 day notice PAYMENT Check 10 day clearance money order Sorry no Visa etc CODs available phone SHIPPING 5375Forelgn Canada add 10% TOTAL others add 15% IL res add 8% tea -SEND GUDERS TO ACAOEMY OF AVIATION RESEARCH & DEVELOPMENT OX 426139 AGO IL 60642 call pizi 4440S 10 am4 pm Man thru SaL fourth equation doing arithmetic serious Electric flier will eventually realize value such measurement ca pability will probably wind up owning least such instrument choices varied mini senes continues well see some features available used readers may familiar other terms RC experience such milliamperes Lets stop square away confusion may come about sort thing basic electrical terms given above several prefixes routinely used make life easier example milliampere 1/1000 ampere Its much easier say one-thousandth ampere prefixes may have heard have scale size commonly used prefixes applicable volts amps ohms micro means 1/1000000 of. milli means 1/1000 of. kilo means 1000 times. mega means 1000000 times. other prefixes like pico nano giga etc often show up hobby usage worked power company youd probably hear expressions like kilovolts megawatts mean thousands volts millions watts respectively Thus common power line voltage parts country 12 Ky 12000 volt line Part city may demand some number MW millions watts see what have sort jargon really abbreviated way talking writing Its easier may offer some initial confusion its much better long run use such expressions looked inside common receivers servos transmitters would find essentially resistors used ranged value few tens ohms about megohm Most would fall between few hundred ohms few hundred thousand ohms would find course could read color codes painted resistor bodies put Electric components ballpark batteries motors fall four 20 volts range motors suitable props draw five 25 amps majority fall six 16 volt 10 15 amp ranges Thus taking limit numbers end find motor input power levels fall between 20 watts very small 500 watts big common ly used ones fall range 60 watts 250 watts Right now everything have flying five planes falls latter range Fornow please forward questions comments SASE please author Happy Electric Landings Parts List parts numbers modifi cation Radio Shack Voltage Inverter described last months column advertantly omitted Refer photo lower riglst corner page 53 June 1985 issue terminal strip cut-down five-lug unit Radio Shack part No 274-688 two 50-volt three amp rectifier diodes Radio Shack part No 276-1141 note direction black-banded end 220 microfarad electrolytic capacitor Radio Shack part No 272-1017 negative lead goes terminal strip Electric event SAM 76s annual Old-Timer meet scheduled July 14 1985 will have added Electric event first time Its no-rules well almost thing wherein requirement model legal Antique Old-Timer design Any electric power system permissible further de tails contact Contest Director Ralph Riddle 2156 Street Rd Warrington PA 18976 Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giht Scale/Beckman Continued page 49 its usually too small Giant Scale models case able build upper panels time complete lower wing just barely fit Sparrowhawk small airplane A-scale lower span less six feet put lower wing jig up side down because has degree negative dihedral As mentioned above wings struts flying wires have removable functional addition struts wires need adjustable struts made aluminum tubing will have spruce strips added bring scale size struts attached machine screws eyebolts wings eyebolts threaded aluminum blocks buried spars running eyebolts out effective length struts can adjusted flying wires made eighth-inch electricians fish tape piece spring steel wire 1-in wide about Y64-in thick available 50- Continued page 140 H ben Old Timer 7ka foam J4o4LL 4/ LMEZOS8 tea Mesa tOot BROOKLYN DODGER 56 Cabin'NEWEST Retail $52 95INTRODUCTORY PRICE $3900 t935 Record Breaker 96 $0956 ls39Zippertf$5356 1938 Kloud KIng 63 $0230 1901 Brigidier 56 $0070 toOl Super Quaker 79 $7276 1940 So Long S0$3036 t$36 Buccaneer 04 $0996 1930 Clipper MKI 72$4156 t937 Dallaire 100 $7516 1035 MIss America 89 $7190 1941 Playboy Sr 50 $5116 1991 Playboy Jr 54 $3116 1938 Powerhouse 54 $53 56 1990 Sailplane 78 $8476 1938 Trenton Terror 12 $4076 1940 Ranger 46$3196 1939 Korda Wake 44 $1916 lO3OAiercury 72 6 kits qualify SAM events FF & R/C feature highest quality machine cut & sanded parts Superior atl Competition sheet strip wood wire & window material Plane orig FE models easily convertible Sch R/C KlTS Sailpianes Electric power Gas Hobby Horn SENSOAR Glidgr 78 5s $1800 Midway Model GNOME R/C Hand Launch Glider$2000 Jolly Models FLINCER R/C HLG 55 Span $2900 Midway Model FAST EDDIE Aerobatic /55 Elec$1900 Jolly Models ELECTRICUS Electric Clider 05a$3250 Leisure PLAYBOY SR 97 Gear 00 Elect $3000 stro ASTRO SPORT 37 Direct 05 Elect$2250 Leisure WASP 37 Direct 05 Electrics $2250 Midway ULTRA MK IV 06 Geared EP $3900 Midway FLYING QUAKER 80 00-454 stroke $6479 4kslMidway DENNY JR 72 Alum Cowel $6396 ptwiTizrNrUFrEErTR1csySTEMWtPIrts Avail SKIPPING & HANDLING 64 Page CATALOGUE Up $800 add $150$200 PP/tat Class $801 $2000 add $225A copy wilt lie sent $2001 $4500 add $300 freewhen requested$4501 $7000 add $350to over $7000 add $400HOBBY HORN CA Addressees add 6% tea15173 Moran St IA Send MO VisaIMCIFEapIPO Box 2212 Check tallow up tO 30Westminster Ca 92600 days CK clearance 1714 8938311 COD Exact Charges plus $150 Hdl iCash OnlylfAft Hrs 1714 89513031 July1985 ii SUPER HAWK FLY MAX relaxing change pace build SUPER HAWK rubber model 1 hour plus glue drying time Show beginner magic thermal flights clubs next picnic funfly try SUPER HAWK contest 15 Wingspan 20 Length Promotional price $1495 plus $165 ahipping US number Write group discount 12 kits Send check money order No COD credit cards Dealers distrib utors please write letterhead standard discount quantities FLY MAX 1i129A Fox Dale ey Ohio 45365 RC Giant Scale/Beckman Continued page 137 100-foot lengths Although exactly scale size its close enough pur poses Pairs wires brazed brass blocks blocks attached wings machine screws same aluminum blocks hold strutattachment eyebolts fuselage ends wires brazed threaded studs secured nuts side metal fuselage fitting Running nuts back forth stud provides adjustment wire tension As uncertain flight characteris tics arent us old fogies around building fly ing models Thirties learned basic design skills relatively inex pensive models Giant Scale aircraft big investment both time money Most todays RC modelers have no real background aerodynamics aeronau tical engineering applied models Theres no reason should excellent kits plans available As result small percentage active modelers actually real design work didnt consider flight charac teristics Sparrowhawk particularly uncertain wouldnt have started first place other hand know no including myself has flown RC version F9C-2 Now Ive said rate Im go ing will dozens air before get finished Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 RC Pylon Racing/Hager Continued page 50 launched fliers airplanes feet firmly planted airplane antenna Thanks go out UPRC clubs races put workers Without wouldnt UPR Circuit Bruce Knox needs mentioned matrix did races bringing out workers cages others too numer ous mention Contestants should always appreciate time efforts contest officials ask nothing return make modeling Racing much enjoyable examples follow North Central Pylon League reports last race 1984 season last race year saw 16 fliers competing honors Grassfield site whole weekend cloudy threat ening rain did Sunday No records broken probably due heavily overcast skies first days race very few record no crashes Sixteen flierswith 16 planesstarted finished way exciting race probably sixth round Bednark Brue shaber up Jerry Bednark right Dougs tail throughout race Doug time 1286 Jerry finished 16 seconds behind 1290 Some new faces appeared racing meet Larry Rosine Larry Riehl Charles Eldridge first days results two classes QSOO Expert class 1 Dennis Hoffman 22 pt1257 2 Doug Brue shaber 20 pt1266 3 Jerry Bednark 19 ptl290 4 Roger Wilson 19 pt1311 5 Jerry Elert 16 pt 1341 Standard class 1 Charles Eldridge 18 pt1435 2 Phil Zuidema 15 pt1334 3 Ronald Edgar 14 pt 1492 4 David Rech 14 pt1535 5 Rick Mercier 11 pt1446 Sunday rains poured poured Contest Director make de cision after some thought made decision race rains finally quit flew Saturday race finished Sunday exactly opposite no-finishes cut outs no-starts crashes second days results two classes Quarter Midget six heats Expert class 1 Dennis Hoffman 20 pt 2 Daniel Norlin 18 pt 3 Roger Wilson 15 pt 4 Richard Steine 11 pt 5 Albert Schwartz 8 Pt Standard class 1 Ronald Gage 17 pt 2 Vic Leerhoff 16 pt 3 Boyd Bowdish 13 pt 4 Del Berryman 13 pt 5 Jerry Elert 12 Pt No times recorded QM races because lack manpower timing CD decided fly off tie between Bowdish Berryman have received several letters about airflow gauge wrote about April issue seems though several have tried some adding various features to improve way another Several suggested monitoring mo tors AC input will vary depending upon time day local usage important AC input main tained known level friend Fred French set up small motor/generator driven small prop end showed Ping Pong ball hooked ammeter worked very well Send hints ideas can pass Support Racing National Miniature Pylon Racing Association group modelers dedicated Pylon Racing NMPRA racing information join write Bruce Richmond 18816 Bilbrook Ln Dallas TX 75252 Annual dues $13 non-flying members $18 flying members See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 140 Model Aviation 4 S Flight TestedContest Proven Rhlnebeclc 82 Results CamelFirst lanes5 awards Scale 2 1 Engine 60 Send 75C latest price list & iiteature VK MODEL AIRCRAFT CO 6866 Transit Rd. Depew NV 14043 716 -684 5555
Edition: Model Aviation - 1985/07
Page Numbers: 48, 49, 137, 140
Radio Control Giant Scale Bob Beckman SPARROWHAWK WINGS letters Ive received response Sparrowhawk articles have compli mentary Im happy able report roses far outnumber brickbats though since people likely take trouble write letter unhappy about some thing figure Im way ahead game brickbats part friendly intent such letter took exception some statements made describing decided build Sparrowhawk commented fact few modelers have taken F9C-2 subject though contemporary ofand just colorful asthe P6-E went say difficult subject both building flying standpoint Gull wingroots extensive complicated strut fairings short nose moment just few factors involved addition made comment about uncertain flight characteristics new modeling friend really objected Im going use some comments help illus trate little what went through selecting Sparrowhawk designing its wing construction First commented fact built rubber-powered models Sparrowhawk Thirties made some rather derisive remarks about modern breed modeler would worry about flight characteristics such fine design comment about strut fairings countered observation respect Sparrowhawk no worse other aircraft whats hard about strut fairings anyway finally pointed out gull center-sections advanta geous since upper wing could built piece attached cabane struts final illuminating comment effect since wasnt Giant Scale builder maybe didnt really appreciate problems having build airplanes come apart can get car Well modicum difference between small lightweight rubberpowered model 20-pound A-scale model both based same aircraft can equally challenging equally rewarding problems involved different example lets look matter fillets 20 strut fairings Sparrowhawk no two identi cal small model some can omitted lack being notice able Others can simply silhouettes maybe carved balsa pieces added side Since model doesnt break apart intentionally whole process relatively simple though tedious Now look quarter-scale version Just because size fillets have finished product wont look right Im talking about museum scale just want mod el reasonably realistic Next fillets have removable Well wings have come off transportation means struts have come off fillets cover attachment points struts case landing gear probably wont take off transportation have able case damage must repaired again fillets cover attachment points Wing structure details Bobs Sparrowhawk left upper wing panel retained spring-loaded watchband pin Note heavy plywood fuselage bulkheads carry loads plus sturdy wing-spar brackets right typical detail wing strut f ting flying-wIre retainer block buried spar aluminum eyeboit threads strut will attach eyeboit other block brass flying wires wIll brazed Machine screws anchor block spar block 48 Model Aviation Giant Scale models structure similar toyet quite unlike ordinary models difference Parts generally bigger must carry larger loads parts top wing Bobs Sparrowhawk left foam-core ribs hardwood spars aluminum-tube leading edge laminated balsa tipsthe balsa wing Ribs top aluminum templates Hawks lower wing R shown jigupside down because required negative dihedral its spars will soon boxed A2ln plywood strength fillets themselves have light weight dont want 20-pound air plane five pounds fillets decided vacuum-form out sheet styrene means Im going have carve 20 plugs since some fillets will have two pieces will easy replace damaged ones later Now see listed fillets possible reason Sparrowhawk common model agree friendly critic about advantages gull wing reasons picked Sparrowhawk first place love biplanes hate cabane struts However never con sidered making upper wing piece though -scale its bit over six feet span Right start planned two panels attached fuselage gull section scale hinge points photos shows solu tion attachment problem springloaded pin like overgrown watchband pin holds wing panel fuselage course struts flying wires have functional since ornithopter lower wing piece though original two panels tached same manner upper wing thinking would need access radio gear anyway might well mount lower wing like conventional low-wing RC model As turns out am going need access through removable skin panels up per center section anyway could have made lower wing two panels Im too far along change now though Construction both wings pretty con ventional some unconventional materials places Six years ago started whole thing hadnt heard read anything about foam core board modeling run across some decided would make good wing ribs some aluminum tubing matched radius airfoil leading edge sheet aluminum used litho plates will cover area leading edge front spar Front rear spars scale locations -in square spruce set notches top bottom ribs made box spar As-in plywood side between ribs Trailing edges three layers Y-in plywood laminated epoxy rigidi ty balsa wings tips laminated A-in strips like build wings Adjusto-Jig Continued page 137 Small Tool opecialists SUMMER SALE CATALOG SAVINGS OF UP TO 50% famous-make tools accessories hard-to-find items FREE GIFTS valued $1495 older direct us mail OVER 1000 ITEMS fully guaranteed MICRO-MARK 5112-79 24 E Main St Clinton NJ 08809 E YES Please RUSH new catalog ordered us before no need mail ~upon Well send new catalog automatically NAME ADDRESS ICITY _______ _____ STATE ____________________ ZIP _____________ m -Fl 2 -I m -Fl C 2 C4 -I m U -I C 2 July1985 49 wing landing gear struts Sparrowhawk will require falrlngs20 no two Identicat Bob plans vacuum-form thin plastic photo taken before upper left wing panel built shows strutlfiylna wire arrangement LEARN TO FLY Beginners start Out right pro fessional comprehensive training foundimentals covered BasictTraint door & Out entire solo much BE INNERS PAC GE OFFER VIDEO PROGRAMS VHS& BETAS oai PROGRAM LISTINGSC 1BASIC CONSTRUCTION FOR BEGINNERS IN RIC107 Mm 4096 .J 2BASIC FUGNTTMAINING FOR BEGINNERS IN RIC65 Mm 4406 esaloasi foigfOIy detailed stspbyetep instruction Z a 3THE WORLD OF MODEL AVIATION90 Mm 4496eZ Expos Scale meets AMA Nets & 4OSHKOSH OVERVIEW56 Mm 3096 Workshops Foroims Tours AerobatIcs Warblrds & MoreAll 5AIRPLANE FIJNNIES Ifl 3006 Rentals MU See friends others goofing wildest video ever 6US SCALE MASTERS CHAMPIONSHIPS60 MIII 3096Si 495 best scale models pilots competIng top honors 7WARBIROS IN ACTIoN75 MIn 49 OBDERDIG INPOUNAflON Please Read CaeAaUv Avosi al Af sales final RENTAL DEPOSIT full purchase price EACH program ordered difference refunded RENTAL DURATION 1 week after delivery Reserved dates reguire 15 day notice PAYMENT Check 10 day clearance money order Sorry no Visa etc CODs available phone SHIPPING 5375Forelgn Canada add 10% TOTAL others add 15% IL res add 8% tea -SEND GUDERS TO ACAOEMY OF AVIATION RESEARCH & DEVELOPMENT OX 426139 AGO IL 60642 call pizi 4440S 10 am4 pm Man thru SaL fourth equation doing arithmetic serious Electric flier will eventually realize value such measurement ca pability will probably wind up owning least such instrument choices varied mini senes continues well see some features available used readers may familiar other terms RC experience such milliamperes Lets stop square away confusion may come about sort thing basic electrical terms given above several prefixes routinely used make life easier example milliampere 1/1000 ampere Its much easier say one-thousandth ampere prefixes may have heard have scale size commonly used prefixes applicable volts amps ohms micro means 1/1000000 of. milli means 1/1000 of. kilo means 1000 times. mega means 1000000 times. other prefixes like pico nano giga etc often show up hobby usage worked power company youd probably hear expressions like kilovolts megawatts mean thousands volts millions watts respectively Thus common power line voltage parts country 12 Ky 12000 volt line Part city may demand some number MW millions watts see what have sort jargon really abbreviated way talking writing Its easier may offer some initial confusion its much better long run use such expressions looked inside common receivers servos transmitters would find essentially resistors used ranged value few tens ohms about megohm Most would fall between few hundred ohms few hundred thousand ohms would find course could read color codes painted resistor bodies put Electric components ballpark batteries motors fall four 20 volts range motors suitable props draw five 25 amps majority fall six 16 volt 10 15 amp ranges Thus taking limit numbers end find motor input power levels fall between 20 watts very small 500 watts big common ly used ones fall range 60 watts 250 watts Right now everything have flying five planes falls latter range Fornow please forward questions comments SASE please author Happy Electric Landings Parts List parts numbers modifi cation Radio Shack Voltage Inverter described last months column advertantly omitted Refer photo lower riglst corner page 53 June 1985 issue terminal strip cut-down five-lug unit Radio Shack part No 274-688 two 50-volt three amp rectifier diodes Radio Shack part No 276-1141 note direction black-banded end 220 microfarad electrolytic capacitor Radio Shack part No 272-1017 negative lead goes terminal strip Electric event SAM 76s annual Old-Timer meet scheduled July 14 1985 will have added Electric event first time Its no-rules well almost thing wherein requirement model legal Antique Old-Timer design Any electric power system permissible further de tails contact Contest Director Ralph Riddle 2156 Street Rd Warrington PA 18976 Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giht Scale/Beckman Continued page 49 its usually too small Giant Scale models case able build upper panels time complete lower wing just barely fit Sparrowhawk small airplane A-scale lower span less six feet put lower wing jig up side down because has degree negative dihedral As mentioned above wings struts flying wires have removable functional addition struts wires need adjustable struts made aluminum tubing will have spruce strips added bring scale size struts attached machine screws eyebolts wings eyebolts threaded aluminum blocks buried spars running eyebolts out effective length struts can adjusted flying wires made eighth-inch electricians fish tape piece spring steel wire 1-in wide about Y64-in thick available 50- Continued page 140 H ben Old Timer 7ka foam J4o4LL 4/ LMEZOS8 tea Mesa tOot BROOKLYN DODGER 56 Cabin'NEWEST Retail $52 95INTRODUCTORY PRICE $3900 t935 Record Breaker 96 $0956 ls39Zippertf$5356 1938 Kloud KIng 63 $0230 1901 Brigidier 56 $0070 toOl Super Quaker 79 $7276 1940 So Long S0$3036 t$36 Buccaneer 04 $0996 1930 Clipper MKI 72$4156 t937 Dallaire 100 $7516 1035 MIss America 89 $7190 1941 Playboy Sr 50 $5116 1991 Playboy Jr 54 $3116 1938 Powerhouse 54 $53 56 1990 Sailplane 78 $8476 1938 Trenton Terror 12 $4076 1940 Ranger 46$3196 1939 Korda Wake 44 $1916 lO3OAiercury 72 6 kits qualify SAM events FF & R/C feature highest quality machine cut & sanded parts Superior atl Competition sheet strip wood wire & window material Plane orig FE models easily convertible Sch R/C KlTS Sailpianes Electric power Gas Hobby Horn SENSOAR Glidgr 78 5s $1800 Midway Model GNOME R/C Hand Launch Glider$2000 Jolly Models FLINCER R/C HLG 55 Span $2900 Midway Model FAST EDDIE Aerobatic /55 Elec$1900 Jolly Models ELECTRICUS Electric Clider 05a$3250 Leisure PLAYBOY SR 97 Gear 00 Elect $3000 stro ASTRO SPORT 37 Direct 05 Elect$2250 Leisure WASP 37 Direct 05 Electrics $2250 Midway ULTRA MK IV 06 Geared EP $3900 Midway FLYING QUAKER 80 00-454 stroke $6479 4kslMidway DENNY JR 72 Alum Cowel $6396 ptwiTizrNrUFrEErTR1csySTEMWtPIrts Avail SKIPPING & HANDLING 64 Page CATALOGUE Up $800 add $150$200 PP/tat Class $801 $2000 add $225A copy wilt lie sent $2001 $4500 add $300 freewhen requested$4501 $7000 add $350to over $7000 add $400HOBBY HORN CA Addressees add 6% tea15173 Moran St IA Send MO VisaIMCIFEapIPO Box 2212 Check tallow up tO 30Westminster Ca 92600 days CK clearance 1714 8938311 COD Exact Charges plus $150 Hdl iCash OnlylfAft Hrs 1714 89513031 July1985 ii SUPER HAWK FLY MAX relaxing change pace build SUPER HAWK rubber model 1 hour plus glue drying time Show beginner magic thermal flights clubs next picnic funfly try SUPER HAWK contest 15 Wingspan 20 Length Promotional price $1495 plus $165 ahipping US number Write group discount 12 kits Send check money order No COD credit cards Dealers distrib utors please write letterhead standard discount quantities FLY MAX 1i129A Fox Dale ey Ohio 45365 RC Giant Scale/Beckman Continued page 137 100-foot lengths Although exactly scale size its close enough pur poses Pairs wires brazed brass blocks blocks attached wings machine screws same aluminum blocks hold strutattachment eyebolts fuselage ends wires brazed threaded studs secured nuts side metal fuselage fitting Running nuts back forth stud provides adjustment wire tension As uncertain flight characteris tics arent us old fogies around building fly ing models Thirties learned basic design skills relatively inex pensive models Giant Scale aircraft big investment both time money Most todays RC modelers have no real background aerodynamics aeronau tical engineering applied models Theres no reason should excellent kits plans available As result small percentage active modelers actually real design work didnt consider flight charac teristics Sparrowhawk particularly uncertain wouldnt have started first place other hand know no including myself has flown RC version F9C-2 Now Ive said rate Im go ing will dozens air before get finished Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 RC Pylon Racing/Hager Continued page 50 launched fliers airplanes feet firmly planted airplane antenna Thanks go out UPRC clubs races put workers Without wouldnt UPR Circuit Bruce Knox needs mentioned matrix did races bringing out workers cages others too numer ous mention Contestants should always appreciate time efforts contest officials ask nothing return make modeling Racing much enjoyable examples follow North Central Pylon League reports last race 1984 season last race year saw 16 fliers competing honors Grassfield site whole weekend cloudy threat ening rain did Sunday No records broken probably due heavily overcast skies first days race very few record no crashes Sixteen flierswith 16 planesstarted finished way exciting race probably sixth round Bednark Brue shaber up Jerry Bednark right Dougs tail throughout race Doug time 1286 Jerry finished 16 seconds behind 1290 Some new faces appeared racing meet Larry Rosine Larry Riehl Charles Eldridge first days results two classes QSOO Expert class 1 Dennis Hoffman 22 pt1257 2 Doug Brue shaber 20 pt1266 3 Jerry Bednark 19 ptl290 4 Roger Wilson 19 pt1311 5 Jerry Elert 16 pt 1341 Standard class 1 Charles Eldridge 18 pt1435 2 Phil Zuidema 15 pt1334 3 Ronald Edgar 14 pt 1492 4 David Rech 14 pt1535 5 Rick Mercier 11 pt1446 Sunday rains poured poured Contest Director make de cision after some thought made decision race rains finally quit flew Saturday race finished Sunday exactly opposite no-finishes cut outs no-starts crashes second days results two classes Quarter Midget six heats Expert class 1 Dennis Hoffman 20 pt 2 Daniel Norlin 18 pt 3 Roger Wilson 15 pt 4 Richard Steine 11 pt 5 Albert Schwartz 8 Pt Standard class 1 Ronald Gage 17 pt 2 Vic Leerhoff 16 pt 3 Boyd Bowdish 13 pt 4 Del Berryman 13 pt 5 Jerry Elert 12 Pt No times recorded QM races because lack manpower timing CD decided fly off tie between Bowdish Berryman have received several letters about airflow gauge wrote about April issue seems though several have tried some adding various features to improve way another Several suggested monitoring mo tors AC input will vary depending upon time day local usage important AC input main tained known level friend Fred French set up small motor/generator driven small prop end showed Ping Pong ball hooked ammeter worked very well Send hints ideas can pass Support Racing National Miniature Pylon Racing Association group modelers dedicated Pylon Racing NMPRA racing information join write Bruce Richmond 18816 Bilbrook Ln Dallas TX 75252 Annual dues $13 non-flying members $18 flying members See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 140 Model Aviation 4 S Flight TestedContest Proven Rhlnebeclc 82 Results CamelFirst lanes5 awards Scale 2 1 Engine 60 Send 75C latest price list & iiteature VK MODEL AIRCRAFT CO 6866 Transit Rd. Depew NV 14043 716 -684 5555
Edition: Model Aviation - 1985/07
Page Numbers: 48, 49, 137, 140
Radio Control Giant Scale Bob Beckman SPARROWHAWK WINGS letters Ive received response Sparrowhawk articles have compli mentary Im happy able report roses far outnumber brickbats though since people likely take trouble write letter unhappy about some thing figure Im way ahead game brickbats part friendly intent such letter took exception some statements made describing decided build Sparrowhawk commented fact few modelers have taken F9C-2 subject though contemporary ofand just colorful asthe P6-E went say difficult subject both building flying standpoint Gull wingroots extensive complicated strut fairings short nose moment just few factors involved addition made comment about uncertain flight characteristics new modeling friend really objected Im going use some comments help illus trate little what went through selecting Sparrowhawk designing its wing construction First commented fact built rubber-powered models Sparrowhawk Thirties made some rather derisive remarks about modern breed modeler would worry about flight characteristics such fine design comment about strut fairings countered observation respect Sparrowhawk no worse other aircraft whats hard about strut fairings anyway finally pointed out gull center-sections advanta geous since upper wing could built piece attached cabane struts final illuminating comment effect since wasnt Giant Scale builder maybe didnt really appreciate problems having build airplanes come apart can get car Well modicum difference between small lightweight rubberpowered model 20-pound A-scale model both based same aircraft can equally challenging equally rewarding problems involved different example lets look matter fillets 20 strut fairings Sparrowhawk no two identi cal small model some can omitted lack being notice able Others can simply silhouettes maybe carved balsa pieces added side Since model doesnt break apart intentionally whole process relatively simple though tedious Now look quarter-scale version Just because size fillets have finished product wont look right Im talking about museum scale just want mod el reasonably realistic Next fillets have removable Well wings have come off transportation means struts have come off fillets cover attachment points struts case landing gear probably wont take off transportation have able case damage must repaired again fillets cover attachment points Wing structure details Bobs Sparrowhawk left upper wing panel retained spring-loaded watchband pin Note heavy plywood fuselage bulkheads carry loads plus sturdy wing-spar brackets right typical detail wing strut f ting flying-wIre retainer block buried spar aluminum eyeboit threads strut will attach eyeboit other block brass flying wires wIll brazed Machine screws anchor block spar block 48 Model Aviation Giant Scale models structure similar toyet quite unlike ordinary models difference Parts generally bigger must carry larger loads parts top wing Bobs Sparrowhawk left foam-core ribs hardwood spars aluminum-tube leading edge laminated balsa tipsthe balsa wing Ribs top aluminum templates Hawks lower wing R shown jigupside down because required negative dihedral its spars will soon boxed A2ln plywood strength fillets themselves have light weight dont want 20-pound air plane five pounds fillets decided vacuum-form out sheet styrene means Im going have carve 20 plugs since some fillets will have two pieces will easy replace damaged ones later Now see listed fillets possible reason Sparrowhawk common model agree friendly critic about advantages gull wing reasons picked Sparrowhawk first place love biplanes hate cabane struts However never con sidered making upper wing piece though -scale its bit over six feet span Right start planned two panels attached fuselage gull section scale hinge points photos shows solu tion attachment problem springloaded pin like overgrown watchband pin holds wing panel fuselage course struts flying wires have functional since ornithopter lower wing piece though original two panels tached same manner upper wing thinking would need access radio gear anyway might well mount lower wing like conventional low-wing RC model As turns out am going need access through removable skin panels up per center section anyway could have made lower wing two panels Im too far along change now though Construction both wings pretty con ventional some unconventional materials places Six years ago started whole thing hadnt heard read anything about foam core board modeling run across some decided would make good wing ribs some aluminum tubing matched radius airfoil leading edge sheet aluminum used litho plates will cover area leading edge front spar Front rear spars scale locations -in square spruce set notches top bottom ribs made box spar As-in plywood side between ribs Trailing edges three layers Y-in plywood laminated epoxy rigidi ty balsa wings tips laminated A-in strips like build wings Adjusto-Jig Continued page 137 Small Tool opecialists SUMMER SALE CATALOG SAVINGS OF UP TO 50% famous-make tools accessories hard-to-find items FREE GIFTS valued $1495 older direct us mail OVER 1000 ITEMS fully guaranteed MICRO-MARK 5112-79 24 E Main St Clinton NJ 08809 E YES Please RUSH new catalog ordered us before no need mail ~upon Well send new catalog automatically NAME ADDRESS ICITY _______ _____ STATE ____________________ ZIP _____________ m -Fl 2 -I m -Fl C 2 C4 -I m U -I C 2 July1985 49 wing landing gear struts Sparrowhawk will require falrlngs20 no two Identicat Bob plans vacuum-form thin plastic photo taken before upper left wing panel built shows strutlfiylna wire arrangement LEARN TO FLY Beginners start Out right pro fessional comprehensive training foundimentals covered BasictTraint door & Out entire solo much BE INNERS PAC GE OFFER VIDEO PROGRAMS VHS& BETAS oai PROGRAM LISTINGSC 1BASIC CONSTRUCTION FOR BEGINNERS IN RIC107 Mm 4096 .J 2BASIC FUGNTTMAINING FOR BEGINNERS IN RIC65 Mm 4406 esaloasi foigfOIy detailed stspbyetep instruction Z a 3THE WORLD OF MODEL AVIATION90 Mm 4496eZ Expos Scale meets AMA Nets & 4OSHKOSH OVERVIEW56 Mm 3096 Workshops Foroims Tours AerobatIcs Warblrds & MoreAll 5AIRPLANE FIJNNIES Ifl 3006 Rentals MU See friends others goofing wildest video ever 6US SCALE MASTERS CHAMPIONSHIPS60 MIII 3096Si 495 best scale models pilots competIng top honors 7WARBIROS IN ACTIoN75 MIn 49 OBDERDIG INPOUNAflON Please Read CaeAaUv Avosi al Af sales final RENTAL DEPOSIT full purchase price EACH program ordered difference refunded RENTAL DURATION 1 week after delivery Reserved dates reguire 15 day notice PAYMENT Check 10 day clearance money order Sorry no Visa etc CODs available phone SHIPPING 5375Forelgn Canada add 10% TOTAL others add 15% IL res add 8% tea -SEND GUDERS TO ACAOEMY OF AVIATION RESEARCH & DEVELOPMENT OX 426139 AGO IL 60642 call pizi 4440S 10 am4 pm Man thru SaL fourth equation doing arithmetic serious Electric flier will eventually realize value such measurement ca pability will probably wind up owning least such instrument choices varied mini senes continues well see some features available used readers may familiar other terms RC experience such milliamperes Lets stop square away confusion may come about sort thing basic electrical terms given above several prefixes routinely used make life easier example milliampere 1/1000 ampere Its much easier say one-thousandth ampere prefixes may have heard have scale size commonly used prefixes applicable volts amps ohms micro means 1/1000000 of. milli means 1/1000 of. kilo means 1000 times. mega means 1000000 times. other prefixes like pico nano giga etc often show up hobby usage worked power company youd probably hear expressions like kilovolts megawatts mean thousands volts millions watts respectively Thus common power line voltage parts country 12 Ky 12000 volt line Part city may demand some number MW millions watts see what have sort jargon really abbreviated way talking writing Its easier may offer some initial confusion its much better long run use such expressions looked inside common receivers servos transmitters would find essentially resistors used ranged value few tens ohms about megohm Most would fall between few hundred ohms few hundred thousand ohms would find course could read color codes painted resistor bodies put Electric components ballpark batteries motors fall four 20 volts range motors suitable props draw five 25 amps majority fall six 16 volt 10 15 amp ranges Thus taking limit numbers end find motor input power levels fall between 20 watts very small 500 watts big common ly used ones fall range 60 watts 250 watts Right now everything have flying five planes falls latter range Fornow please forward questions comments SASE please author Happy Electric Landings Parts List parts numbers modifi cation Radio Shack Voltage Inverter described last months column advertantly omitted Refer photo lower riglst corner page 53 June 1985 issue terminal strip cut-down five-lug unit Radio Shack part No 274-688 two 50-volt three amp rectifier diodes Radio Shack part No 276-1141 note direction black-banded end 220 microfarad electrolytic capacitor Radio Shack part No 272-1017 negative lead goes terminal strip Electric event SAM 76s annual Old-Timer meet scheduled July 14 1985 will have added Electric event first time Its no-rules well almost thing wherein requirement model legal Antique Old-Timer design Any electric power system permissible further de tails contact Contest Director Ralph Riddle 2156 Street Rd Warrington PA 18976 Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giht Scale/Beckman Continued page 49 its usually too small Giant Scale models case able build upper panels time complete lower wing just barely fit Sparrowhawk small airplane A-scale lower span less six feet put lower wing jig up side down because has degree negative dihedral As mentioned above wings struts flying wires have removable functional addition struts wires need adjustable struts made aluminum tubing will have spruce strips added bring scale size struts attached machine screws eyebolts wings eyebolts threaded aluminum blocks buried spars running eyebolts out effective length struts can adjusted flying wires made eighth-inch electricians fish tape piece spring steel wire 1-in wide about Y64-in thick available 50- Continued page 140 H ben Old Timer 7ka foam J4o4LL 4/ LMEZOS8 tea Mesa tOot BROOKLYN DODGER 56 Cabin'NEWEST Retail $52 95INTRODUCTORY PRICE $3900 t935 Record Breaker 96 $0956 ls39Zippertf$5356 1938 Kloud KIng 63 $0230 1901 Brigidier 56 $0070 toOl Super Quaker 79 $7276 1940 So Long S0$3036 t$36 Buccaneer 04 $0996 1930 Clipper MKI 72$4156 t937 Dallaire 100 $7516 1035 MIss America 89 $7190 1941 Playboy Sr 50 $5116 1991 Playboy Jr 54 $3116 1938 Powerhouse 54 $53 56 1990 Sailplane 78 $8476 1938 Trenton Terror 12 $4076 1940 Ranger 46$3196 1939 Korda Wake 44 $1916 lO3OAiercury 72 6 kits qualify SAM events FF & R/C feature highest quality machine cut & sanded parts Superior atl Competition sheet strip wood wire & window material Plane orig FE models easily convertible Sch R/C KlTS Sailpianes Electric power Gas Hobby Horn SENSOAR Glidgr 78 5s $1800 Midway Model GNOME R/C Hand Launch Glider$2000 Jolly Models FLINCER R/C HLG 55 Span $2900 Midway Model FAST EDDIE Aerobatic /55 Elec$1900 Jolly Models ELECTRICUS Electric Clider 05a$3250 Leisure PLAYBOY SR 97 Gear 00 Elect $3000 stro ASTRO SPORT 37 Direct 05 Elect$2250 Leisure WASP 37 Direct 05 Electrics $2250 Midway ULTRA MK IV 06 Geared EP $3900 Midway FLYING QUAKER 80 00-454 stroke $6479 4kslMidway DENNY JR 72 Alum Cowel $6396 ptwiTizrNrUFrEErTR1csySTEMWtPIrts Avail SKIPPING & HANDLING 64 Page CATALOGUE Up $800 add $150$200 PP/tat Class $801 $2000 add $225A copy wilt lie sent $2001 $4500 add $300 freewhen requested$4501 $7000 add $350to over $7000 add $400HOBBY HORN CA Addressees add 6% tea15173 Moran St IA Send MO VisaIMCIFEapIPO Box 2212 Check tallow up tO 30Westminster Ca 92600 days CK clearance 1714 8938311 COD Exact Charges plus $150 Hdl iCash OnlylfAft Hrs 1714 89513031 July1985 ii SUPER HAWK FLY MAX relaxing change pace build SUPER HAWK rubber model 1 hour plus glue drying time Show beginner magic thermal flights clubs next picnic funfly try SUPER HAWK contest 15 Wingspan 20 Length Promotional price $1495 plus $165 ahipping US number Write group discount 12 kits Send check money order No COD credit cards Dealers distrib utors please write letterhead standard discount quantities FLY MAX 1i129A Fox Dale ey Ohio 45365 RC Giant Scale/Beckman Continued page 137 100-foot lengths Although exactly scale size its close enough pur poses Pairs wires brazed brass blocks blocks attached wings machine screws same aluminum blocks hold strutattachment eyebolts fuselage ends wires brazed threaded studs secured nuts side metal fuselage fitting Running nuts back forth stud provides adjustment wire tension As uncertain flight characteris tics arent us old fogies around building fly ing models Thirties learned basic design skills relatively inex pensive models Giant Scale aircraft big investment both time money Most todays RC modelers have no real background aerodynamics aeronau tical engineering applied models Theres no reason should excellent kits plans available As result small percentage active modelers actually real design work didnt consider flight charac teristics Sparrowhawk particularly uncertain wouldnt have started first place other hand know no including myself has flown RC version F9C-2 Now Ive said rate Im go ing will dozens air before get finished Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 RC Pylon Racing/Hager Continued page 50 launched fliers airplanes feet firmly planted airplane antenna Thanks go out UPRC clubs races put workers Without wouldnt UPR Circuit Bruce Knox needs mentioned matrix did races bringing out workers cages others too numer ous mention Contestants should always appreciate time efforts contest officials ask nothing return make modeling Racing much enjoyable examples follow North Central Pylon League reports last race 1984 season last race year saw 16 fliers competing honors Grassfield site whole weekend cloudy threat ening rain did Sunday No records broken probably due heavily overcast skies first days race very few record no crashes Sixteen flierswith 16 planesstarted finished way exciting race probably sixth round Bednark Brue shaber up Jerry Bednark right Dougs tail throughout race Doug time 1286 Jerry finished 16 seconds behind 1290 Some new faces appeared racing meet Larry Rosine Larry Riehl Charles Eldridge first days results two classes QSOO Expert class 1 Dennis Hoffman 22 pt1257 2 Doug Brue shaber 20 pt1266 3 Jerry Bednark 19 ptl290 4 Roger Wilson 19 pt1311 5 Jerry Elert 16 pt 1341 Standard class 1 Charles Eldridge 18 pt1435 2 Phil Zuidema 15 pt1334 3 Ronald Edgar 14 pt 1492 4 David Rech 14 pt1535 5 Rick Mercier 11 pt1446 Sunday rains poured poured Contest Director make de cision after some thought made decision race rains finally quit flew Saturday race finished Sunday exactly opposite no-finishes cut outs no-starts crashes second days results two classes Quarter Midget six heats Expert class 1 Dennis Hoffman 20 pt 2 Daniel Norlin 18 pt 3 Roger Wilson 15 pt 4 Richard Steine 11 pt 5 Albert Schwartz 8 Pt Standard class 1 Ronald Gage 17 pt 2 Vic Leerhoff 16 pt 3 Boyd Bowdish 13 pt 4 Del Berryman 13 pt 5 Jerry Elert 12 Pt No times recorded QM races because lack manpower timing CD decided fly off tie between Bowdish Berryman have received several letters about airflow gauge wrote about April issue seems though several have tried some adding various features to improve way another Several suggested monitoring mo tors AC input will vary depending upon time day local usage important AC input main tained known level friend Fred French set up small motor/generator driven small prop end showed Ping Pong ball hooked ammeter worked very well Send hints ideas can pass Support Racing National Miniature Pylon Racing Association group modelers dedicated Pylon Racing NMPRA racing information join write Bruce Richmond 18816 Bilbrook Ln Dallas TX 75252 Annual dues $13 non-flying members $18 flying members See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 140 Model Aviation 4 S Flight TestedContest Proven Rhlnebeclc 82 Results CamelFirst lanes5 awards Scale 2 1 Engine 60 Send 75C latest price list & iiteature VK MODEL AIRCRAFT CO 6866 Transit Rd. Depew NV 14043 716 -684 5555