Dr D B Mathews STRESS MANAGEMENT HAVE YOU noticed latest hot topic seminars around country stress management hard understand occurs people hobby like better able blow off stresses real world recreational activities nonparticipatory Im talking couch potatoes As matter fact stress management techniques often recommended seminars get hobby certainly excellent solutionas long hobby doesnt become stressful hear flying groups members somehow let themselves get too serious about building flying us make concentrated effort relax have good time Franldy its unfair flier desperately needs stress relief around someone wound up tighter Wakefield After arent flying Fun guess what Im trying say someone obviously stressed remind fun THAT MISSING DRAWING April 1992 column described Brian Ulwins airfoil modifications Goldberg Eagle II promised drawing new airfoil somehow ended up part William McCombss article vertical tail size drawing reprinted issue Raising entry leading edge changed characteristics model attempting show another justification semisymmetrical airfoil set markedly positive angle attack used Whiz 40 project WISH ID THOUGHT OF IT Although 42-page Kit-Builders Guide included abovementioned Ace R/C Whiz 40 kit also available separately carries by-line 26 Model Aviation ccTh 909 N Maize Rd Townhouse 734 Wichita KS 76212 Bill Dunlop Greensburg Pennsylvania built Free Flight electric-powered 44in-span Dornier DO-X HiLine Don Srull drawings Bill Dunlop photo 15/St HINGE TOOL Drawing photograph neat slotting tool Hot Hinges Ace Whiz 40 kit So RimnIA vAt fl nrnctlcal Mary Reese powers 114scale Mooney Mite OS 120 twin other two cylinders dummies plane flies beautifully remarkably aerobatic some hints artwork photos done factory makes neat arrangement reader disagrees suggested techniques can blame Tom Runge staff other hand reader sees something thinks brilliant can take credit really useful suggestions cant take credit designed prevent usual dust-on-everything problem associated sanding model shop Purchase box fan discounter along furnace filter will cover back fan Tape filter onto back run fan sanding fan will draw sawdust filter prevent spreading over room Now wish Id thought Included kit another gadget wish Id invented photo drawing pretty well illustrate use X-Acto blade glued using CyAcyanoacrylate glue between two scraps appropriate wood thickness center thickness surface slotted works amazingly well slotting guide Hot Hinges youve tried freehanding used hinge-slotting tool found slots much too large can appreciate practicality simple little device passing word caution concerning Hot Hinges other fuzzy-surfaced one-piece flexible hinges hinges Continued page 30 August1992 27 Left Side-by-side comparison two Al Mooney-designed airplanes Mark Van Sants Culver Cadet right Craig Williamss Dart left Right Culver Driggs Dart 1/4-scale Craig Williams Overland Park KS Gene Marshall photos canard eita Dan StOCK wing stab motor stick reworked prop hub make pusher Built assistant scoutmaster Joe Utasi Boy Scout competition Modified Leading Edge wing ProfileModified Aileron extended Stock Goldberg Eagle 63 Rib Profile9 Ulwin Drawing showing Brian VIwins airfoil modifications Goldberg Eagle II Raising entry leading edge changed characteristics model Len BlIl Cohen Bob Longstreet 14-foot Taibi Powerhouse Right Jim Saftigs Super Zilch scaled down construction article February 1979 MA recreated photographed Floyd Carter Los Altos California battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will lake through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $275 Cat No 202 Air Cleaner Fine $275 Replacement Inserts Cat No 104 PkI2 Inserts Coarse $239 Cat No 204 PkI2 Inserts Fine $239 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc po Box 3788 Center Line Michigan 48015 Add $250 shipping igan residents add 4% sales taxi Models War/Maxwell Continued page 29 Wisconsin scheduled refurbished displayed near future Ventura Division Northrop Aircraft Inc predecessor Radioplane Company produced target drones 1930s 1940s surprisingly enough owns single wartime drone Its packed away warehouse Although box labeled OQ-2A drone actually OQ-2B since wing ribs have lightening holes fuselage uncovered revealing welded steel tube construction showing receiver servo Fred T Collins Pittsburgh Pennsylvania has built full-scale flying replica OQ-2A Judging both pictures Ive seen Freds description its flying characteristics drone masterpiece people have mistaken real thing Freds model weighs 48 pounds original weighed 108 pounds Fred Collinss address 29 Stewart Avenue Pittsburgh PA 15227 enormous interest recreational RC activities seen today probably stimulated least part servicemens wartime exposure target drones us served wartime drone units have unique distinction grandchildren ask What did war Grandpa can answer flew model alrplanes Send comments anecdotes 413 East 6th Street Clare MI 48617 call 519 386-2574 ng Fun/Mathews Continued page 27 immensely appealing since much easier install yet seem just durable older hinge designs mentioned previous column problems hinge failures Ive found problem slots too thick using mediumviscosity CyA dont work folks slots dont fill completely CyA doesnt flow properly results hinges marginal safety Hot Hinges need fit quite snugly slots should adhered thin CyA Use microapplicator tips such ones PlC will deliver wellcontrolled flow thin CyA allowing wick osmosis along fuzzy hinge layer Just dont overfill enough create hinge block joint Continued page 32 fl RI IV ALOBEE GLOW PLUGS osophy. atureta QuadrasZenoahs AEM Sachs others 5 Aircraft quality 6061 T6 aluninure Mounts sade length require * 5oy degree right doan thrust builtin * HeliArc welded licensed A&P Mechanics * Starting $4995 5tH A1imi-d Qut Memis 2237 tillington Dr HarveyLA 70058 904 7319710 CHECK- MONEY ORDER B&P Associates Gives Total Flight Line FREEDOM SUPER CHEETAHUNBREAKABLE FUSELAGE Span 64 Area 496 sq Weight 34 oz approx Loading 1045 az/sq ft $5295 Plus Tax & Shipping Slope Acrobatic/Combat Gliders CHEETAH MODELSDEALER INQUIRY IN VI TED 14725 Bessemer St B 818 781-4544 Van Nuys CA 91411 30 Model Aviation SM-4 Throttle Opto-isolator no Rx noise High-rate low Motor losses SMPOONOO ifi-Pewer MOSFETs Surface mount reliability Sermos connectors staadard Muazted heatsink case Futaba J lead staasdard Small 10 x z 0 15 ounce Optimized 7 24 cells dip coupon special $99 JOMAR PRODUCTS 8606 Susanview Ln Cinti OH 45244 513474-0985 Pfeaae Inalud $2 Shipping MC & VI8a Accpmdl Renege tedCSA Cent fedAedeien F eNo5p F eNoPenner E26226R25 54Predacts es Only certified checks money orders accepted Minimum order 81400 three paokageuof4Powerpoles $400 per package 0200 shipping end handlingi CT residents add sales tao Prices subject change mithout notice DEALER INQUIRIES INVITED farther information deole prices send SASS Business Card SERMOS RIC SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 0690512031322-6294 Flying Fun Continued page 30 sealed hinge technique mentioned several columns ago used surfaces hinged before covering anyway Controlling runoff nearly critical since CyA isnt going run over covering Use X-Acto tool thin CyA applicator tips youll very satisfied FOURTEEN FEET WITH 12-OUNCE WING LOADING Bill Cohen Paso Robles California constructed double-size Taibi powerhouse 1978 monster models rare Bill suffered disabling injury what refers murder cycle year flying buddy Bob Longstreet suggested build b-i-i-g plane get Bills mind off being confined wheelchair going fly nonstop Ontario California Las Vegas After kicking idea around perusing quite few sets plans decided pal Sal Taibis Powerhouse Bob Sliff Hobby Horn plans blown up double size called Sal told him what mind agreed cut wood Superior Aircraft Materials see ad issue project after first advising us surely certifiably crazy Have ever seen piece /16 x /16 spruce 10 feet long able cut two wing ribs sheet /32 x 4 x 48 balsa wing area came out 4704 sq total weight 25 1/4 lb works out about 12-ounce wing loading 13 ribs wing panel four separate center section two sections joined 1/4 wire rod running brass tubing two large hooks hold six #64 rubberbands tension through cutout center ribs landing gear made 1/4 drill rod Sal bent house wife Nan standing bench hold down early days jumbo models werent big accessories like wheels control horns like largest wheels could buy six-inch Cub types undercarriage weighs nearly five pounds roughly 20% total aircraft weight first used fiberglass pushrods controls changed pull-pull cables eliminate slop surfaces made real believer out Now opt build convert Old-Timer use cable systems took nine large rolls MonoKote cover 20 bottles CyA two large containers white glue remembers what else First flight old Ontario Motor Speedway parking lot attended myself Sal Bob wives monster Bob flying took off about 15 20 feet flew like proverbial baby carriage will fly forever just above idle Quadra 35 Landing another matter literally does want come down took almost entire length parking lot settle onto its wheels wheelchair Bobs knees shaking hard could never have walked Sal ran down retrieve hauled back tail shoulder Quite sight few years ago Sals Powerhouse float drawings blown up double size Since double Powerhouse still flyable Id like build have really big ROW Now project certainly fits description Flying Fun doesnt ENOUGH POWER During emergency phone call above subject asked Bill Cohen Quadra 35 Powerhouse wasnt bit too much power responded chuckle said really dont know Ive never flown over half throttle both agreed that judicious model would very likely wildly unstable probably outside its structural strength limits brings up area does seem well understood modelers new hobbypower-to-weight ratios 14-foot Powerhouse weighed 50 pounds Quadra would likely provide barely enough power propped some sort high-pitch unit would take much longer take off would fly vastly faster once unloaded point power must matched aircraft raw size minor consideration Im reminded experience Air Force days clearly illustrates danger over-powering aircraft Back aerial refueling tanker available TAC Boeing KB-SO few KC-97s belonged SAC set up boom refueling systems KB-SO relatively satisfactory probe-and-drogue configuration refuel F-86 F-84 fighter bombers However North American F-100 Super Sabre came squadron use quickly apparent KB-SO barely fast enough higher altitudes stay above stall speed F-lO0 actually flew along mission really legal dentist lots fun tanker flown 150 dive F-84Fs staggering around nearly stalled trying best get hooked up interim solution send KB-SOs off Hayes aircraft Birmingham Alabama fitted supplemental pair J-47 jet engines modification possible fly QUICK-BUILT SUPER TOUGH 5 AirCore 40 faniPy Trainer Explorer Floats NEW VHS VIDEO CATALOG $695 &h Tessa resalents pleaae add sales tax US Air Core 4576 claire Chennaull Hangar 7 Dallas TX 75248 1-800-336-0602 orders 214 250-1914 info above fighters stall speed other severe problems encountered nearly invalidated KB-50J project startling observations Ive ever made during refueling flight off Texas coast early morning KB-50J jets pair F-lOOs refueling happened glance pilots hands discovered flying airplane trim tabs No use control column recovered composure enough ask advised thatalthough didnt really want known otherwise darned airplane would porpoise badly could held level nearly uncontrollable J-47s running Additionally aithough Hayes Air reinforced some criticai areas Boeing aircraft handle additional speedimposed loads extremely maintenance prone ally verging unsafe flight line fire station right next door dentai clinic used haif-jokingly tease crash crews about spending day flight line whenthe KB-50Js flying safety record frankly very poor numerous accessory failures such loss pressurization blown windows fuel system failures failure electronic gear vibration levels loss access panels flight high-speed flutter stress cracks vibration-associated failures perfectly useful aircraft good safety record admired flying characteristics overpowered overstressed well outside Boeings original design limits result turkey So what does have model airplanes think quite bit really Over last several years us old hands have commented other about ridiculous oversized power plants missized props excess weight fast flying see some newcomers models As way old hands disdainfully dismiss obviously foolhardy choices ignorance shrug shoulders know-it-all way After reflecting problem think can offer explanation total disregard basic aerodynamics wit Theres whole generation modelers have never built trimmed flown Free Flight models consequently dont have foggiest idea thrust settings balance points horizontai verticai fin size prop diameter pitch aircraft speed prop speed structurai air loads etc have dealt model designs Weve seen flying sites fluttering surfaces high-speed stalls wings tails coming off wild structural vibration pitch yaw instability props making terrible noises blade-stall pussycat models becoming wild monsters overweight models dropping like stones 0 RnaJ]y An Engine Mount System Wont Shake Rattle Roll fly model planes dont have tell theres whole lotta shakin goin now theres something cando about Sullivan Flex Mount System Its engine mounting sys tem has specially designed rubber isolators absorb enene vibration reduce noise andi limit wear tear mode thats Flex-Mount comes aluminum adaptor plate makes easy mount 4060 90 two-cycle engines firewall strap mount beam mounting four-cyde engines So dont jitterbug i~lk dealer Suffivan Flex-Mount engine mount j ing system thought rock roll P PRODUCIS wouLd never dieP0 80X5166 Baltimore MD 21224 Getting Better Ideas Off Ground cleaning out undercarriage sorts other gruesome stuff Ive personally seen Goldberg Ultimate SuperTigre S-2500 Midwest Aero Star OS 90 four-stroke Ace 4-40 powered Enya 45CX builder/pilots actually complained vociferously about lack ground clearance suitable prop least man-carrying vehicles pilots life jeopardy Im too comfortable about spectators model No right mind would weld 350-hp Lycoming onto Cessna 150 major structural strengthening careful recalculation numbers jet fighter flying experience However otherwise-rational modelers seem equivalent time kit plans indicate power range designer means isnt fool know larger engine prop safe hed recommend since power options usable design better will sell wonder sometimes whether unscrupulous dealers arent recommending large engines because sell bucks Whatever causative factor factors behooves us use little common Continued page 35 August 1992 33 Flying Fun Continued page 33 horse sense selecting engines props models favorite saying applies Learn mistakes others youll never live long enough make yourself DRIGGS OR CULVER first saw Craig Williamss model identified Driggs Dart told Culver Dart Having wrong once twice before figured off identification some little voice back head kept asking Are sure Just hunch dug Out well-used copy Underwood Collinge s Lightplane Since 1909 page 158 aircraft identified 1935 Dart Monosport G 90-horsepower Lambert identified Al Mooney design Knowing Al moved Wichita Culver bought out Dart Co clarifies confusion Obviously same basic design built both manufacturers indeed both Dart Culver side-by-side photo clearly displays family resemblance since both Dart Cadet quarter-scale also obvious latter considerably smaller As airplane buffs know Culver closed Mooney went produce line private aircraft Texas What isnt well known developed single-place Mooney Mite Wichita before moving watching 1946 AMA Nationals Wichita buddy started looking hangars around Boeing ramps Control Line events held peeked locked wooden temporary structure see tiny all-metal low-wing aircraft looked bit like miniature Mustang no idea what struck underwing air scoop what appeared inverted Crosley automobile engine now youve guessed spying first prototype Mooney Mite Needless say Crosley engine replaced Continental 65 before flights completed Another aside might find interest plant Culvers built still exists now used manufacture another product might have heard aboutColeman lanterns such THE 1939 DART Craig Williams Kansas City scratchbuilt Culver Dart Golden Era Plans John Eaton all-wood no foam does have fiberglass cowl pants Total weight 14 pounds plane powered 05 120 four-stroke swinging 16 x 8 prop Covering Solartex painted Poly U Red Devil urethanes Needless say quarter-scale project out-of-the-rut very impressed realistically gently flew Tell Control Horn Go Wont Get Bent Out 01 Shape airplane enthusiast know has same problems control horns flex bend break-what else new Introducing Sullivan 555 toughest control horn ever made Craftec[with tempered steel instead plastic nickelplated wear resistance Sullivan Control Horn 555 built exacting specifications eliminate flex flutter Better still comes complete glass-filled nylon bushing prevent metal-to-metal contact radio interference sized fit either devises Sullivans New Ball joint System easy off-axis movement Sullivan 555 Finally control horn F PRODUCLS thats made right stuif P0 Box 5166 Baldmore MD 21224 Getting Better Ideas Off Ground really nice companion project Mark Van Sants Culver Cadet featured earlier column Wouldnt neat somehow get Dart Cadet Marvin Reeces Mite air together Hmrnm * Paper Airplanes Continued page 24 project designed stimulate interest aeronautical engineering motivate students pursue careers engineering science project coordinator Ferdinand W Grosveld Lockheed Engineering Sciences Company commented students learned teamwork engineering overlooked powerfully demonstrated recent capture Intelsat satellite Other participants included AIAA Jim Penland Wilmer H Reed III Mohammed Takallu Edgar G Waggoner Virginia Air Space Harley Caroline Hill Greg Selby Ben Continued page 45 August1992 35
Edition: Model Aviation - 1992/08
Page Numbers: 26, 27, 30, 32, 33, 35
Dr D B Mathews STRESS MANAGEMENT HAVE YOU noticed latest hot topic seminars around country stress management hard understand occurs people hobby like better able blow off stresses real world recreational activities nonparticipatory Im talking couch potatoes As matter fact stress management techniques often recommended seminars get hobby certainly excellent solutionas long hobby doesnt become stressful hear flying groups members somehow let themselves get too serious about building flying us make concentrated effort relax have good time Franldy its unfair flier desperately needs stress relief around someone wound up tighter Wakefield After arent flying Fun guess what Im trying say someone obviously stressed remind fun THAT MISSING DRAWING April 1992 column described Brian Ulwins airfoil modifications Goldberg Eagle II promised drawing new airfoil somehow ended up part William McCombss article vertical tail size drawing reprinted issue Raising entry leading edge changed characteristics model attempting show another justification semisymmetrical airfoil set markedly positive angle attack used Whiz 40 project WISH ID THOUGHT OF IT Although 42-page Kit-Builders Guide included abovementioned Ace R/C Whiz 40 kit also available separately carries by-line 26 Model Aviation ccTh 909 N Maize Rd Townhouse 734 Wichita KS 76212 Bill Dunlop Greensburg Pennsylvania built Free Flight electric-powered 44in-span Dornier DO-X HiLine Don Srull drawings Bill Dunlop photo 15/St HINGE TOOL Drawing photograph neat slotting tool Hot Hinges Ace Whiz 40 kit So RimnIA vAt fl nrnctlcal Mary Reese powers 114scale Mooney Mite OS 120 twin other two cylinders dummies plane flies beautifully remarkably aerobatic some hints artwork photos done factory makes neat arrangement reader disagrees suggested techniques can blame Tom Runge staff other hand reader sees something thinks brilliant can take credit really useful suggestions cant take credit designed prevent usual dust-on-everything problem associated sanding model shop Purchase box fan discounter along furnace filter will cover back fan Tape filter onto back run fan sanding fan will draw sawdust filter prevent spreading over room Now wish Id thought Included kit another gadget wish Id invented photo drawing pretty well illustrate use X-Acto blade glued using CyAcyanoacrylate glue between two scraps appropriate wood thickness center thickness surface slotted works amazingly well slotting guide Hot Hinges youve tried freehanding used hinge-slotting tool found slots much too large can appreciate practicality simple little device passing word caution concerning Hot Hinges other fuzzy-surfaced one-piece flexible hinges hinges Continued page 30 August1992 27 Left Side-by-side comparison two Al Mooney-designed airplanes Mark Van Sants Culver Cadet right Craig Williamss Dart left Right Culver Driggs Dart 1/4-scale Craig Williams Overland Park KS Gene Marshall photos canard eita Dan StOCK wing stab motor stick reworked prop hub make pusher Built assistant scoutmaster Joe Utasi Boy Scout competition Modified Leading Edge wing ProfileModified Aileron extended Stock Goldberg Eagle 63 Rib Profile9 Ulwin Drawing showing Brian VIwins airfoil modifications Goldberg Eagle II Raising entry leading edge changed characteristics model Len BlIl Cohen Bob Longstreet 14-foot Taibi Powerhouse Right Jim Saftigs Super Zilch scaled down construction article February 1979 MA recreated photographed Floyd Carter Los Altos California battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will lake through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $275 Cat No 202 Air Cleaner Fine $275 Replacement Inserts Cat No 104 PkI2 Inserts Coarse $239 Cat No 204 PkI2 Inserts Fine $239 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc po Box 3788 Center Line Michigan 48015 Add $250 shipping igan residents add 4% sales taxi Models War/Maxwell Continued page 29 Wisconsin scheduled refurbished displayed near future Ventura Division Northrop Aircraft Inc predecessor Radioplane Company produced target drones 1930s 1940s surprisingly enough owns single wartime drone Its packed away warehouse Although box labeled OQ-2A drone actually OQ-2B since wing ribs have lightening holes fuselage uncovered revealing welded steel tube construction showing receiver servo Fred T Collins Pittsburgh Pennsylvania has built full-scale flying replica OQ-2A Judging both pictures Ive seen Freds description its flying characteristics drone masterpiece people have mistaken real thing Freds model weighs 48 pounds original weighed 108 pounds Fred Collinss address 29 Stewart Avenue Pittsburgh PA 15227 enormous interest recreational RC activities seen today probably stimulated least part servicemens wartime exposure target drones us served wartime drone units have unique distinction grandchildren ask What did war Grandpa can answer flew model alrplanes Send comments anecdotes 413 East 6th Street Clare MI 48617 call 519 386-2574 ng Fun/Mathews Continued page 27 immensely appealing since much easier install yet seem just durable older hinge designs mentioned previous column problems hinge failures Ive found problem slots too thick using mediumviscosity CyA dont work folks slots dont fill completely CyA doesnt flow properly results hinges marginal safety Hot Hinges need fit quite snugly slots should adhered thin CyA Use microapplicator tips such ones PlC will deliver wellcontrolled flow thin CyA allowing wick osmosis along fuzzy hinge layer Just dont overfill enough create hinge block joint Continued page 32 fl RI IV ALOBEE GLOW PLUGS osophy. atureta QuadrasZenoahs AEM Sachs others 5 Aircraft quality 6061 T6 aluninure Mounts sade length require * 5oy degree right doan thrust builtin * HeliArc welded licensed A&P Mechanics * Starting $4995 5tH A1imi-d Qut Memis 2237 tillington Dr HarveyLA 70058 904 7319710 CHECK- MONEY ORDER B&P Associates Gives Total Flight Line FREEDOM SUPER CHEETAHUNBREAKABLE FUSELAGE Span 64 Area 496 sq Weight 34 oz approx Loading 1045 az/sq ft $5295 Plus Tax & Shipping Slope Acrobatic/Combat Gliders CHEETAH MODELSDEALER INQUIRY IN VI TED 14725 Bessemer St B 818 781-4544 Van Nuys CA 91411 30 Model Aviation SM-4 Throttle Opto-isolator no Rx noise High-rate low Motor losses SMPOONOO ifi-Pewer MOSFETs Surface mount reliability Sermos connectors staadard Muazted heatsink case Futaba J lead staasdard Small 10 x z 0 15 ounce Optimized 7 24 cells dip coupon special $99 JOMAR PRODUCTS 8606 Susanview Ln Cinti OH 45244 513474-0985 Pfeaae Inalud $2 Shipping MC & VI8a Accpmdl Renege tedCSA Cent fedAedeien F eNo5p F eNoPenner E26226R25 54Predacts es Only certified checks money orders accepted Minimum order 81400 three paokageuof4Powerpoles $400 per package 0200 shipping end handlingi CT residents add sales tao Prices subject change mithout notice DEALER INQUIRIES INVITED farther information deole prices send SASS Business Card SERMOS RIC SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 0690512031322-6294 Flying Fun Continued page 30 sealed hinge technique mentioned several columns ago used surfaces hinged before covering anyway Controlling runoff nearly critical since CyA isnt going run over covering Use X-Acto tool thin CyA applicator tips youll very satisfied FOURTEEN FEET WITH 12-OUNCE WING LOADING Bill Cohen Paso Robles California constructed double-size Taibi powerhouse 1978 monster models rare Bill suffered disabling injury what refers murder cycle year flying buddy Bob Longstreet suggested build b-i-i-g plane get Bills mind off being confined wheelchair going fly nonstop Ontario California Las Vegas After kicking idea around perusing quite few sets plans decided pal Sal Taibis Powerhouse Bob Sliff Hobby Horn plans blown up double size called Sal told him what mind agreed cut wood Superior Aircraft Materials see ad issue project after first advising us surely certifiably crazy Have ever seen piece /16 x /16 spruce 10 feet long able cut two wing ribs sheet /32 x 4 x 48 balsa wing area came out 4704 sq total weight 25 1/4 lb works out about 12-ounce wing loading 13 ribs wing panel four separate center section two sections joined 1/4 wire rod running brass tubing two large hooks hold six #64 rubberbands tension through cutout center ribs landing gear made 1/4 drill rod Sal bent house wife Nan standing bench hold down early days jumbo models werent big accessories like wheels control horns like largest wheels could buy six-inch Cub types undercarriage weighs nearly five pounds roughly 20% total aircraft weight first used fiberglass pushrods controls changed pull-pull cables eliminate slop surfaces made real believer out Now opt build convert Old-Timer use cable systems took nine large rolls MonoKote cover 20 bottles CyA two large containers white glue remembers what else First flight old Ontario Motor Speedway parking lot attended myself Sal Bob wives monster Bob flying took off about 15 20 feet flew like proverbial baby carriage will fly forever just above idle Quadra 35 Landing another matter literally does want come down took almost entire length parking lot settle onto its wheels wheelchair Bobs knees shaking hard could never have walked Sal ran down retrieve hauled back tail shoulder Quite sight few years ago Sals Powerhouse float drawings blown up double size Since double Powerhouse still flyable Id like build have really big ROW Now project certainly fits description Flying Fun doesnt ENOUGH POWER During emergency phone call above subject asked Bill Cohen Quadra 35 Powerhouse wasnt bit too much power responded chuckle said really dont know Ive never flown over half throttle both agreed that judicious model would very likely wildly unstable probably outside its structural strength limits brings up area does seem well understood modelers new hobbypower-to-weight ratios 14-foot Powerhouse weighed 50 pounds Quadra would likely provide barely enough power propped some sort high-pitch unit would take much longer take off would fly vastly faster once unloaded point power must matched aircraft raw size minor consideration Im reminded experience Air Force days clearly illustrates danger over-powering aircraft Back aerial refueling tanker available TAC Boeing KB-SO few KC-97s belonged SAC set up boom refueling systems KB-SO relatively satisfactory probe-and-drogue configuration refuel F-86 F-84 fighter bombers However North American F-100 Super Sabre came squadron use quickly apparent KB-SO barely fast enough higher altitudes stay above stall speed F-lO0 actually flew along mission really legal dentist lots fun tanker flown 150 dive F-84Fs staggering around nearly stalled trying best get hooked up interim solution send KB-SOs off Hayes aircraft Birmingham Alabama fitted supplemental pair J-47 jet engines modification possible fly QUICK-BUILT SUPER TOUGH 5 AirCore 40 faniPy Trainer Explorer Floats NEW VHS VIDEO CATALOG $695 &h Tessa resalents pleaae add sales tax US Air Core 4576 claire Chennaull Hangar 7 Dallas TX 75248 1-800-336-0602 orders 214 250-1914 info above fighters stall speed other severe problems encountered nearly invalidated KB-50J project startling observations Ive ever made during refueling flight off Texas coast early morning KB-50J jets pair F-lOOs refueling happened glance pilots hands discovered flying airplane trim tabs No use control column recovered composure enough ask advised thatalthough didnt really want known otherwise darned airplane would porpoise badly could held level nearly uncontrollable J-47s running Additionally aithough Hayes Air reinforced some criticai areas Boeing aircraft handle additional speedimposed loads extremely maintenance prone ally verging unsafe flight line fire station right next door dentai clinic used haif-jokingly tease crash crews about spending day flight line whenthe KB-50Js flying safety record frankly very poor numerous accessory failures such loss pressurization blown windows fuel system failures failure electronic gear vibration levels loss access panels flight high-speed flutter stress cracks vibration-associated failures perfectly useful aircraft good safety record admired flying characteristics overpowered overstressed well outside Boeings original design limits result turkey So what does have model airplanes think quite bit really Over last several years us old hands have commented other about ridiculous oversized power plants missized props excess weight fast flying see some newcomers models As way old hands disdainfully dismiss obviously foolhardy choices ignorance shrug shoulders know-it-all way After reflecting problem think can offer explanation total disregard basic aerodynamics wit Theres whole generation modelers have never built trimmed flown Free Flight models consequently dont have foggiest idea thrust settings balance points horizontai verticai fin size prop diameter pitch aircraft speed prop speed structurai air loads etc have dealt model designs Weve seen flying sites fluttering surfaces high-speed stalls wings tails coming off wild structural vibration pitch yaw instability props making terrible noises blade-stall pussycat models becoming wild monsters overweight models dropping like stones 0 RnaJ]y An Engine Mount System Wont Shake Rattle Roll fly model planes dont have tell theres whole lotta shakin goin now theres something cando about Sullivan Flex Mount System Its engine mounting sys tem has specially designed rubber isolators absorb enene vibration reduce noise andi limit wear tear mode thats Flex-Mount comes aluminum adaptor plate makes easy mount 4060 90 two-cycle engines firewall strap mount beam mounting four-cyde engines So dont jitterbug i~lk dealer Suffivan Flex-Mount engine mount j ing system thought rock roll P PRODUCIS wouLd never dieP0 80X5166 Baltimore MD 21224 Getting Better Ideas Off Ground cleaning out undercarriage sorts other gruesome stuff Ive personally seen Goldberg Ultimate SuperTigre S-2500 Midwest Aero Star OS 90 four-stroke Ace 4-40 powered Enya 45CX builder/pilots actually complained vociferously about lack ground clearance suitable prop least man-carrying vehicles pilots life jeopardy Im too comfortable about spectators model No right mind would weld 350-hp Lycoming onto Cessna 150 major structural strengthening careful recalculation numbers jet fighter flying experience However otherwise-rational modelers seem equivalent time kit plans indicate power range designer means isnt fool know larger engine prop safe hed recommend since power options usable design better will sell wonder sometimes whether unscrupulous dealers arent recommending large engines because sell bucks Whatever causative factor factors behooves us use little common Continued page 35 August 1992 33 Flying Fun Continued page 33 horse sense selecting engines props models favorite saying applies Learn mistakes others youll never live long enough make yourself DRIGGS OR CULVER first saw Craig Williamss model identified Driggs Dart told Culver Dart Having wrong once twice before figured off identification some little voice back head kept asking Are sure Just hunch dug Out well-used copy Underwood Collinge s Lightplane Since 1909 page 158 aircraft identified 1935 Dart Monosport G 90-horsepower Lambert identified Al Mooney design Knowing Al moved Wichita Culver bought out Dart Co clarifies confusion Obviously same basic design built both manufacturers indeed both Dart Culver side-by-side photo clearly displays family resemblance since both Dart Cadet quarter-scale also obvious latter considerably smaller As airplane buffs know Culver closed Mooney went produce line private aircraft Texas What isnt well known developed single-place Mooney Mite Wichita before moving watching 1946 AMA Nationals Wichita buddy started looking hangars around Boeing ramps Control Line events held peeked locked wooden temporary structure see tiny all-metal low-wing aircraft looked bit like miniature Mustang no idea what struck underwing air scoop what appeared inverted Crosley automobile engine now youve guessed spying first prototype Mooney Mite Needless say Crosley engine replaced Continental 65 before flights completed Another aside might find interest plant Culvers built still exists now used manufacture another product might have heard aboutColeman lanterns such THE 1939 DART Craig Williams Kansas City scratchbuilt Culver Dart Golden Era Plans John Eaton all-wood no foam does have fiberglass cowl pants Total weight 14 pounds plane powered 05 120 four-stroke swinging 16 x 8 prop Covering Solartex painted Poly U Red Devil urethanes Needless say quarter-scale project out-of-the-rut very impressed realistically gently flew Tell Control Horn Go Wont Get Bent Out 01 Shape airplane enthusiast know has same problems control horns flex bend break-what else new Introducing Sullivan 555 toughest control horn ever made Craftec[with tempered steel instead plastic nickelplated wear resistance Sullivan Control Horn 555 built exacting specifications eliminate flex flutter Better still comes complete glass-filled nylon bushing prevent metal-to-metal contact radio interference sized fit either devises Sullivans New Ball joint System easy off-axis movement Sullivan 555 Finally control horn F PRODUCLS thats made right stuif P0 Box 5166 Baldmore MD 21224 Getting Better Ideas Off Ground really nice companion project Mark Van Sants Culver Cadet featured earlier column Wouldnt neat somehow get Dart Cadet Marvin Reeces Mite air together Hmrnm * Paper Airplanes Continued page 24 project designed stimulate interest aeronautical engineering motivate students pursue careers engineering science project coordinator Ferdinand W Grosveld Lockheed Engineering Sciences Company commented students learned teamwork engineering overlooked powerfully demonstrated recent capture Intelsat satellite Other participants included AIAA Jim Penland Wilmer H Reed III Mohammed Takallu Edgar G Waggoner Virginia Air Space Harley Caroline Hill Greg Selby Ben Continued page 45 August1992 35
Edition: Model Aviation - 1992/08
Page Numbers: 26, 27, 30, 32, 33, 35
Dr D B Mathews STRESS MANAGEMENT HAVE YOU noticed latest hot topic seminars around country stress management hard understand occurs people hobby like better able blow off stresses real world recreational activities nonparticipatory Im talking couch potatoes As matter fact stress management techniques often recommended seminars get hobby certainly excellent solutionas long hobby doesnt become stressful hear flying groups members somehow let themselves get too serious about building flying us make concentrated effort relax have good time Franldy its unfair flier desperately needs stress relief around someone wound up tighter Wakefield After arent flying Fun guess what Im trying say someone obviously stressed remind fun THAT MISSING DRAWING April 1992 column described Brian Ulwins airfoil modifications Goldberg Eagle II promised drawing new airfoil somehow ended up part William McCombss article vertical tail size drawing reprinted issue Raising entry leading edge changed characteristics model attempting show another justification semisymmetrical airfoil set markedly positive angle attack used Whiz 40 project WISH ID THOUGHT OF IT Although 42-page Kit-Builders Guide included abovementioned Ace R/C Whiz 40 kit also available separately carries by-line 26 Model Aviation ccTh 909 N Maize Rd Townhouse 734 Wichita KS 76212 Bill Dunlop Greensburg Pennsylvania built Free Flight electric-powered 44in-span Dornier DO-X HiLine Don Srull drawings Bill Dunlop photo 15/St HINGE TOOL Drawing photograph neat slotting tool Hot Hinges Ace Whiz 40 kit So RimnIA vAt fl nrnctlcal Mary Reese powers 114scale Mooney Mite OS 120 twin other two cylinders dummies plane flies beautifully remarkably aerobatic some hints artwork photos done factory makes neat arrangement reader disagrees suggested techniques can blame Tom Runge staff other hand reader sees something thinks brilliant can take credit really useful suggestions cant take credit designed prevent usual dust-on-everything problem associated sanding model shop Purchase box fan discounter along furnace filter will cover back fan Tape filter onto back run fan sanding fan will draw sawdust filter prevent spreading over room Now wish Id thought Included kit another gadget wish Id invented photo drawing pretty well illustrate use X-Acto blade glued using CyAcyanoacrylate glue between two scraps appropriate wood thickness center thickness surface slotted works amazingly well slotting guide Hot Hinges youve tried freehanding used hinge-slotting tool found slots much too large can appreciate practicality simple little device passing word caution concerning Hot Hinges other fuzzy-surfaced one-piece flexible hinges hinges Continued page 30 August1992 27 Left Side-by-side comparison two Al Mooney-designed airplanes Mark Van Sants Culver Cadet right Craig Williamss Dart left Right Culver Driggs Dart 1/4-scale Craig Williams Overland Park KS Gene Marshall photos canard eita Dan StOCK wing stab motor stick reworked prop hub make pusher Built assistant scoutmaster Joe Utasi Boy Scout competition Modified Leading Edge wing ProfileModified Aileron extended Stock Goldberg Eagle 63 Rib Profile9 Ulwin Drawing showing Brian VIwins airfoil modifications Goldberg Eagle II Raising entry leading edge changed characteristics model Len BlIl Cohen Bob Longstreet 14-foot Taibi Powerhouse Right Jim Saftigs Super Zilch scaled down construction article February 1979 MA recreated photographed Floyd Carter Los Altos California battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will lake through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $275 Cat No 202 Air Cleaner Fine $275 Replacement Inserts Cat No 104 PkI2 Inserts Coarse $239 Cat No 204 PkI2 Inserts Fine $239 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc po Box 3788 Center Line Michigan 48015 Add $250 shipping igan residents add 4% sales taxi Models War/Maxwell Continued page 29 Wisconsin scheduled refurbished displayed near future Ventura Division Northrop Aircraft Inc predecessor Radioplane Company produced target drones 1930s 1940s surprisingly enough owns single wartime drone Its packed away warehouse Although box labeled OQ-2A drone actually OQ-2B since wing ribs have lightening holes fuselage uncovered revealing welded steel tube construction showing receiver servo Fred T Collins Pittsburgh Pennsylvania has built full-scale flying replica OQ-2A Judging both pictures Ive seen Freds description its flying characteristics drone masterpiece people have mistaken real thing Freds model weighs 48 pounds original weighed 108 pounds Fred Collinss address 29 Stewart Avenue Pittsburgh PA 15227 enormous interest recreational RC activities seen today probably stimulated least part servicemens wartime exposure target drones us served wartime drone units have unique distinction grandchildren ask What did war Grandpa can answer flew model alrplanes Send comments anecdotes 413 East 6th Street Clare MI 48617 call 519 386-2574 ng Fun/Mathews Continued page 27 immensely appealing since much easier install yet seem just durable older hinge designs mentioned previous column problems hinge failures Ive found problem slots too thick using mediumviscosity CyA dont work folks slots dont fill completely CyA doesnt flow properly results hinges marginal safety Hot Hinges need fit quite snugly slots should adhered thin CyA Use microapplicator tips such ones PlC will deliver wellcontrolled flow thin CyA allowing wick osmosis along fuzzy hinge layer Just dont overfill enough create hinge block joint Continued page 32 fl RI IV ALOBEE GLOW PLUGS osophy. atureta QuadrasZenoahs AEM Sachs others 5 Aircraft quality 6061 T6 aluninure Mounts sade length require * 5oy degree right doan thrust builtin * HeliArc welded licensed A&P Mechanics * Starting $4995 5tH A1imi-d Qut Memis 2237 tillington Dr HarveyLA 70058 904 7319710 CHECK- MONEY ORDER B&P Associates Gives Total Flight Line FREEDOM SUPER CHEETAHUNBREAKABLE FUSELAGE Span 64 Area 496 sq Weight 34 oz approx Loading 1045 az/sq ft $5295 Plus Tax & Shipping Slope Acrobatic/Combat Gliders CHEETAH MODELSDEALER INQUIRY IN VI TED 14725 Bessemer St B 818 781-4544 Van Nuys CA 91411 30 Model Aviation SM-4 Throttle Opto-isolator no Rx noise High-rate low Motor losses SMPOONOO ifi-Pewer MOSFETs Surface mount reliability Sermos connectors staadard Muazted heatsink case Futaba J lead staasdard Small 10 x z 0 15 ounce Optimized 7 24 cells dip coupon special $99 JOMAR PRODUCTS 8606 Susanview Ln Cinti OH 45244 513474-0985 Pfeaae Inalud $2 Shipping MC & VI8a Accpmdl Renege tedCSA Cent fedAedeien F eNo5p F eNoPenner E26226R25 54Predacts es Only certified checks money orders accepted Minimum order 81400 three paokageuof4Powerpoles $400 per package 0200 shipping end handlingi CT residents add sales tao Prices subject change mithout notice DEALER INQUIRIES INVITED farther information deole prices send SASS Business Card SERMOS RIC SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 0690512031322-6294 Flying Fun Continued page 30 sealed hinge technique mentioned several columns ago used surfaces hinged before covering anyway Controlling runoff nearly critical since CyA isnt going run over covering Use X-Acto tool thin CyA applicator tips youll very satisfied FOURTEEN FEET WITH 12-OUNCE WING LOADING Bill Cohen Paso Robles California constructed double-size Taibi powerhouse 1978 monster models rare Bill suffered disabling injury what refers murder cycle year flying buddy Bob Longstreet suggested build b-i-i-g plane get Bills mind off being confined wheelchair going fly nonstop Ontario California Las Vegas After kicking idea around perusing quite few sets plans decided pal Sal Taibis Powerhouse Bob Sliff Hobby Horn plans blown up double size called Sal told him what mind agreed cut wood Superior Aircraft Materials see ad issue project after first advising us surely certifiably crazy Have ever seen piece /16 x /16 spruce 10 feet long able cut two wing ribs sheet /32 x 4 x 48 balsa wing area came out 4704 sq total weight 25 1/4 lb works out about 12-ounce wing loading 13 ribs wing panel four separate center section two sections joined 1/4 wire rod running brass tubing two large hooks hold six #64 rubberbands tension through cutout center ribs landing gear made 1/4 drill rod Sal bent house wife Nan standing bench hold down early days jumbo models werent big accessories like wheels control horns like largest wheels could buy six-inch Cub types undercarriage weighs nearly five pounds roughly 20% total aircraft weight first used fiberglass pushrods controls changed pull-pull cables eliminate slop surfaces made real believer out Now opt build convert Old-Timer use cable systems took nine large rolls MonoKote cover 20 bottles CyA two large containers white glue remembers what else First flight old Ontario Motor Speedway parking lot attended myself Sal Bob wives monster Bob flying took off about 15 20 feet flew like proverbial baby carriage will fly forever just above idle Quadra 35 Landing another matter literally does want come down took almost entire length parking lot settle onto its wheels wheelchair Bobs knees shaking hard could never have walked Sal ran down retrieve hauled back tail shoulder Quite sight few years ago Sals Powerhouse float drawings blown up double size Since double Powerhouse still flyable Id like build have really big ROW Now project certainly fits description Flying Fun doesnt ENOUGH POWER During emergency phone call above subject asked Bill Cohen Quadra 35 Powerhouse wasnt bit too much power responded chuckle said really dont know Ive never flown over half throttle both agreed that judicious model would very likely wildly unstable probably outside its structural strength limits brings up area does seem well understood modelers new hobbypower-to-weight ratios 14-foot Powerhouse weighed 50 pounds Quadra would likely provide barely enough power propped some sort high-pitch unit would take much longer take off would fly vastly faster once unloaded point power must matched aircraft raw size minor consideration Im reminded experience Air Force days clearly illustrates danger over-powering aircraft Back aerial refueling tanker available TAC Boeing KB-SO few KC-97s belonged SAC set up boom refueling systems KB-SO relatively satisfactory probe-and-drogue configuration refuel F-86 F-84 fighter bombers However North American F-100 Super Sabre came squadron use quickly apparent KB-SO barely fast enough higher altitudes stay above stall speed F-lO0 actually flew along mission really legal dentist lots fun tanker flown 150 dive F-84Fs staggering around nearly stalled trying best get hooked up interim solution send KB-SOs off Hayes aircraft Birmingham Alabama fitted supplemental pair J-47 jet engines modification possible fly QUICK-BUILT SUPER TOUGH 5 AirCore 40 faniPy Trainer Explorer Floats NEW VHS VIDEO CATALOG $695 &h Tessa resalents pleaae add sales tax US Air Core 4576 claire Chennaull Hangar 7 Dallas TX 75248 1-800-336-0602 orders 214 250-1914 info above fighters stall speed other severe problems encountered nearly invalidated KB-50J project startling observations Ive ever made during refueling flight off Texas coast early morning KB-50J jets pair F-lOOs refueling happened glance pilots hands discovered flying airplane trim tabs No use control column recovered composure enough ask advised thatalthough didnt really want known otherwise darned airplane would porpoise badly could held level nearly uncontrollable J-47s running Additionally aithough Hayes Air reinforced some criticai areas Boeing aircraft handle additional speedimposed loads extremely maintenance prone ally verging unsafe flight line fire station right next door dentai clinic used haif-jokingly tease crash crews about spending day flight line whenthe KB-50Js flying safety record frankly very poor numerous accessory failures such loss pressurization blown windows fuel system failures failure electronic gear vibration levels loss access panels flight high-speed flutter stress cracks vibration-associated failures perfectly useful aircraft good safety record admired flying characteristics overpowered overstressed well outside Boeings original design limits result turkey So what does have model airplanes think quite bit really Over last several years us old hands have commented other about ridiculous oversized power plants missized props excess weight fast flying see some newcomers models As way old hands disdainfully dismiss obviously foolhardy choices ignorance shrug shoulders know-it-all way After reflecting problem think can offer explanation total disregard basic aerodynamics wit Theres whole generation modelers have never built trimmed flown Free Flight models consequently dont have foggiest idea thrust settings balance points horizontai verticai fin size prop diameter pitch aircraft speed prop speed structurai air loads etc have dealt model designs Weve seen flying sites fluttering surfaces high-speed stalls wings tails coming off wild structural vibration pitch yaw instability props making terrible noises blade-stall pussycat models becoming wild monsters overweight models dropping like stones 0 RnaJ]y An Engine Mount System Wont Shake Rattle Roll fly model planes dont have tell theres whole lotta shakin goin now theres something cando about Sullivan Flex Mount System Its engine mounting sys tem has specially designed rubber isolators absorb enene vibration reduce noise andi limit wear tear mode thats Flex-Mount comes aluminum adaptor plate makes easy mount 4060 90 two-cycle engines firewall strap mount beam mounting four-cyde engines So dont jitterbug i~lk dealer Suffivan Flex-Mount engine mount j ing system thought rock roll P PRODUCIS wouLd never dieP0 80X5166 Baltimore MD 21224 Getting Better Ideas Off Ground cleaning out undercarriage sorts other gruesome stuff Ive personally seen Goldberg Ultimate SuperTigre S-2500 Midwest Aero Star OS 90 four-stroke Ace 4-40 powered Enya 45CX builder/pilots actually complained vociferously about lack ground clearance suitable prop least man-carrying vehicles pilots life jeopardy Im too comfortable about spectators model No right mind would weld 350-hp Lycoming onto Cessna 150 major structural strengthening careful recalculation numbers jet fighter flying experience However otherwise-rational modelers seem equivalent time kit plans indicate power range designer means isnt fool know larger engine prop safe hed recommend since power options usable design better will sell wonder sometimes whether unscrupulous dealers arent recommending large engines because sell bucks Whatever causative factor factors behooves us use little common Continued page 35 August 1992 33 Flying Fun Continued page 33 horse sense selecting engines props models favorite saying applies Learn mistakes others youll never live long enough make yourself DRIGGS OR CULVER first saw Craig Williamss model identified Driggs Dart told Culver Dart Having wrong once twice before figured off identification some little voice back head kept asking Are sure Just hunch dug Out well-used copy Underwood Collinge s Lightplane Since 1909 page 158 aircraft identified 1935 Dart Monosport G 90-horsepower Lambert identified Al Mooney design Knowing Al moved Wichita Culver bought out Dart Co clarifies confusion Obviously same basic design built both manufacturers indeed both Dart Culver side-by-side photo clearly displays family resemblance since both Dart Cadet quarter-scale also obvious latter considerably smaller As airplane buffs know Culver closed Mooney went produce line private aircraft Texas What isnt well known developed single-place Mooney Mite Wichita before moving watching 1946 AMA Nationals Wichita buddy started looking hangars around Boeing ramps Control Line events held peeked locked wooden temporary structure see tiny all-metal low-wing aircraft looked bit like miniature Mustang no idea what struck underwing air scoop what appeared inverted Crosley automobile engine now youve guessed spying first prototype Mooney Mite Needless say Crosley engine replaced Continental 65 before flights completed Another aside might find interest plant Culvers built still exists now used manufacture another product might have heard aboutColeman lanterns such THE 1939 DART Craig Williams Kansas City scratchbuilt Culver Dart Golden Era Plans John Eaton all-wood no foam does have fiberglass cowl pants Total weight 14 pounds plane powered 05 120 four-stroke swinging 16 x 8 prop Covering Solartex painted Poly U Red Devil urethanes Needless say quarter-scale project out-of-the-rut very impressed realistically gently flew Tell Control Horn Go Wont Get Bent Out 01 Shape airplane enthusiast know has same problems control horns flex bend break-what else new Introducing Sullivan 555 toughest control horn ever made Craftec[with tempered steel instead plastic nickelplated wear resistance Sullivan Control Horn 555 built exacting specifications eliminate flex flutter Better still comes complete glass-filled nylon bushing prevent metal-to-metal contact radio interference sized fit either devises Sullivans New Ball joint System easy off-axis movement Sullivan 555 Finally control horn F PRODUCLS thats made right stuif P0 Box 5166 Baldmore MD 21224 Getting Better Ideas Off Ground really nice companion project Mark Van Sants Culver Cadet featured earlier column Wouldnt neat somehow get Dart Cadet Marvin Reeces Mite air together Hmrnm * Paper Airplanes Continued page 24 project designed stimulate interest aeronautical engineering motivate students pursue careers engineering science project coordinator Ferdinand W Grosveld Lockheed Engineering Sciences Company commented students learned teamwork engineering overlooked powerfully demonstrated recent capture Intelsat satellite Other participants included AIAA Jim Penland Wilmer H Reed III Mohammed Takallu Edgar G Waggoner Virginia Air Space Harley Caroline Hill Greg Selby Ben Continued page 45 August1992 35
Edition: Model Aviation - 1992/08
Page Numbers: 26, 27, 30, 32, 33, 35
Dr D B Mathews STRESS MANAGEMENT HAVE YOU noticed latest hot topic seminars around country stress management hard understand occurs people hobby like better able blow off stresses real world recreational activities nonparticipatory Im talking couch potatoes As matter fact stress management techniques often recommended seminars get hobby certainly excellent solutionas long hobby doesnt become stressful hear flying groups members somehow let themselves get too serious about building flying us make concentrated effort relax have good time Franldy its unfair flier desperately needs stress relief around someone wound up tighter Wakefield After arent flying Fun guess what Im trying say someone obviously stressed remind fun THAT MISSING DRAWING April 1992 column described Brian Ulwins airfoil modifications Goldberg Eagle II promised drawing new airfoil somehow ended up part William McCombss article vertical tail size drawing reprinted issue Raising entry leading edge changed characteristics model attempting show another justification semisymmetrical airfoil set markedly positive angle attack used Whiz 40 project WISH ID THOUGHT OF IT Although 42-page Kit-Builders Guide included abovementioned Ace R/C Whiz 40 kit also available separately carries by-line 26 Model Aviation ccTh 909 N Maize Rd Townhouse 734 Wichita KS 76212 Bill Dunlop Greensburg Pennsylvania built Free Flight electric-powered 44in-span Dornier DO-X HiLine Don Srull drawings Bill Dunlop photo 15/St HINGE TOOL Drawing photograph neat slotting tool Hot Hinges Ace Whiz 40 kit So RimnIA vAt fl nrnctlcal Mary Reese powers 114scale Mooney Mite OS 120 twin other two cylinders dummies plane flies beautifully remarkably aerobatic some hints artwork photos done factory makes neat arrangement reader disagrees suggested techniques can blame Tom Runge staff other hand reader sees something thinks brilliant can take credit really useful suggestions cant take credit designed prevent usual dust-on-everything problem associated sanding model shop Purchase box fan discounter along furnace filter will cover back fan Tape filter onto back run fan sanding fan will draw sawdust filter prevent spreading over room Now wish Id thought Included kit another gadget wish Id invented photo drawing pretty well illustrate use X-Acto blade glued using CyAcyanoacrylate glue between two scraps appropriate wood thickness center thickness surface slotted works amazingly well slotting guide Hot Hinges youve tried freehanding used hinge-slotting tool found slots much too large can appreciate practicality simple little device passing word caution concerning Hot Hinges other fuzzy-surfaced one-piece flexible hinges hinges Continued page 30 August1992 27 Left Side-by-side comparison two Al Mooney-designed airplanes Mark Van Sants Culver Cadet right Craig Williamss Dart left Right Culver Driggs Dart 1/4-scale Craig Williams Overland Park KS Gene Marshall photos canard eita Dan StOCK wing stab motor stick reworked prop hub make pusher Built assistant scoutmaster Joe Utasi Boy Scout competition Modified Leading Edge wing ProfileModified Aileron extended Stock Goldberg Eagle 63 Rib Profile9 Ulwin Drawing showing Brian VIwins airfoil modifications Goldberg Eagle II Raising entry leading edge changed characteristics model Len BlIl Cohen Bob Longstreet 14-foot Taibi Powerhouse Right Jim Saftigs Super Zilch scaled down construction article February 1979 MA recreated photographed Floyd Carter Los Altos California battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will lake through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $275 Cat No 202 Air Cleaner Fine $275 Replacement Inserts Cat No 104 PkI2 Inserts Coarse $239 Cat No 204 PkI2 Inserts Fine $239 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc po Box 3788 Center Line Michigan 48015 Add $250 shipping igan residents add 4% sales taxi Models War/Maxwell Continued page 29 Wisconsin scheduled refurbished displayed near future Ventura Division Northrop Aircraft Inc predecessor Radioplane Company produced target drones 1930s 1940s surprisingly enough owns single wartime drone Its packed away warehouse Although box labeled OQ-2A drone actually OQ-2B since wing ribs have lightening holes fuselage uncovered revealing welded steel tube construction showing receiver servo Fred T Collins Pittsburgh Pennsylvania has built full-scale flying replica OQ-2A Judging both pictures Ive seen Freds description its flying characteristics drone masterpiece people have mistaken real thing Freds model weighs 48 pounds original weighed 108 pounds Fred Collinss address 29 Stewart Avenue Pittsburgh PA 15227 enormous interest recreational RC activities seen today probably stimulated least part servicemens wartime exposure target drones us served wartime drone units have unique distinction grandchildren ask What did war Grandpa can answer flew model alrplanes Send comments anecdotes 413 East 6th Street Clare MI 48617 call 519 386-2574 ng Fun/Mathews Continued page 27 immensely appealing since much easier install yet seem just durable older hinge designs mentioned previous column problems hinge failures Ive found problem slots too thick using mediumviscosity CyA dont work folks slots dont fill completely CyA doesnt flow properly results hinges marginal safety Hot Hinges need fit quite snugly slots should adhered thin CyA Use microapplicator tips such ones PlC will deliver wellcontrolled flow thin CyA allowing wick osmosis along fuzzy hinge layer Just dont overfill enough create hinge block joint Continued page 32 fl RI IV ALOBEE GLOW PLUGS osophy. atureta QuadrasZenoahs AEM Sachs others 5 Aircraft quality 6061 T6 aluninure Mounts sade length require * 5oy degree right doan thrust builtin * HeliArc welded licensed A&P Mechanics * Starting $4995 5tH A1imi-d Qut Memis 2237 tillington Dr HarveyLA 70058 904 7319710 CHECK- MONEY ORDER B&P Associates Gives Total Flight Line FREEDOM SUPER CHEETAHUNBREAKABLE FUSELAGE Span 64 Area 496 sq Weight 34 oz approx Loading 1045 az/sq ft $5295 Plus Tax & Shipping Slope Acrobatic/Combat Gliders CHEETAH MODELSDEALER INQUIRY IN VI TED 14725 Bessemer St B 818 781-4544 Van Nuys CA 91411 30 Model Aviation SM-4 Throttle Opto-isolator no Rx noise High-rate low Motor losses SMPOONOO ifi-Pewer MOSFETs Surface mount reliability Sermos connectors staadard Muazted heatsink case Futaba J lead staasdard Small 10 x z 0 15 ounce Optimized 7 24 cells dip coupon special $99 JOMAR PRODUCTS 8606 Susanview Ln Cinti OH 45244 513474-0985 Pfeaae Inalud $2 Shipping MC & VI8a Accpmdl Renege tedCSA Cent fedAedeien F eNo5p F eNoPenner E26226R25 54Predacts es Only certified checks money orders accepted Minimum order 81400 three paokageuof4Powerpoles $400 per package 0200 shipping end handlingi CT residents add sales tao Prices subject change mithout notice DEALER INQUIRIES INVITED farther information deole prices send SASS Business Card SERMOS RIC SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 0690512031322-6294 Flying Fun Continued page 30 sealed hinge technique mentioned several columns ago used surfaces hinged before covering anyway Controlling runoff nearly critical since CyA isnt going run over covering Use X-Acto tool thin CyA applicator tips youll very satisfied FOURTEEN FEET WITH 12-OUNCE WING LOADING Bill Cohen Paso Robles California constructed double-size Taibi powerhouse 1978 monster models rare Bill suffered disabling injury what refers murder cycle year flying buddy Bob Longstreet suggested build b-i-i-g plane get Bills mind off being confined wheelchair going fly nonstop Ontario California Las Vegas After kicking idea around perusing quite few sets plans decided pal Sal Taibis Powerhouse Bob Sliff Hobby Horn plans blown up double size called Sal told him what mind agreed cut wood Superior Aircraft Materials see ad issue project after first advising us surely certifiably crazy Have ever seen piece /16 x /16 spruce 10 feet long able cut two wing ribs sheet /32 x 4 x 48 balsa wing area came out 4704 sq total weight 25 1/4 lb works out about 12-ounce wing loading 13 ribs wing panel four separate center section two sections joined 1/4 wire rod running brass tubing two large hooks hold six #64 rubberbands tension through cutout center ribs landing gear made 1/4 drill rod Sal bent house wife Nan standing bench hold down early days jumbo models werent big accessories like wheels control horns like largest wheels could buy six-inch Cub types undercarriage weighs nearly five pounds roughly 20% total aircraft weight first used fiberglass pushrods controls changed pull-pull cables eliminate slop surfaces made real believer out Now opt build convert Old-Timer use cable systems took nine large rolls MonoKote cover 20 bottles CyA two large containers white glue remembers what else First flight old Ontario Motor Speedway parking lot attended myself Sal Bob wives monster Bob flying took off about 15 20 feet flew like proverbial baby carriage will fly forever just above idle Quadra 35 Landing another matter literally does want come down took almost entire length parking lot settle onto its wheels wheelchair Bobs knees shaking hard could never have walked Sal ran down retrieve hauled back tail shoulder Quite sight few years ago Sals Powerhouse float drawings blown up double size Since double Powerhouse still flyable Id like build have really big ROW Now project certainly fits description Flying Fun doesnt ENOUGH POWER During emergency phone call above subject asked Bill Cohen Quadra 35 Powerhouse wasnt bit too much power responded chuckle said really dont know Ive never flown over half throttle both agreed that judicious model would very likely wildly unstable probably outside its structural strength limits brings up area does seem well understood modelers new hobbypower-to-weight ratios 14-foot Powerhouse weighed 50 pounds Quadra would likely provide barely enough power propped some sort high-pitch unit would take much longer take off would fly vastly faster once unloaded point power must matched aircraft raw size minor consideration Im reminded experience Air Force days clearly illustrates danger over-powering aircraft Back aerial refueling tanker available TAC Boeing KB-SO few KC-97s belonged SAC set up boom refueling systems KB-SO relatively satisfactory probe-and-drogue configuration refuel F-86 F-84 fighter bombers However North American F-100 Super Sabre came squadron use quickly apparent KB-SO barely fast enough higher altitudes stay above stall speed F-lO0 actually flew along mission really legal dentist lots fun tanker flown 150 dive F-84Fs staggering around nearly stalled trying best get hooked up interim solution send KB-SOs off Hayes aircraft Birmingham Alabama fitted supplemental pair J-47 jet engines modification possible fly QUICK-BUILT SUPER TOUGH 5 AirCore 40 faniPy Trainer Explorer Floats NEW VHS VIDEO CATALOG $695 &h Tessa resalents pleaae add sales tax US Air Core 4576 claire Chennaull Hangar 7 Dallas TX 75248 1-800-336-0602 orders 214 250-1914 info above fighters stall speed other severe problems encountered nearly invalidated KB-50J project startling observations Ive ever made during refueling flight off Texas coast early morning KB-50J jets pair F-lOOs refueling happened glance pilots hands discovered flying airplane trim tabs No use control column recovered composure enough ask advised thatalthough didnt really want known otherwise darned airplane would porpoise badly could held level nearly uncontrollable J-47s running Additionally aithough Hayes Air reinforced some criticai areas Boeing aircraft handle additional speedimposed loads extremely maintenance prone ally verging unsafe flight line fire station right next door dentai clinic used haif-jokingly tease crash crews about spending day flight line whenthe KB-50Js flying safety record frankly very poor numerous accessory failures such loss pressurization blown windows fuel system failures failure electronic gear vibration levels loss access panels flight high-speed flutter stress cracks vibration-associated failures perfectly useful aircraft good safety record admired flying characteristics overpowered overstressed well outside Boeings original design limits result turkey So what does have model airplanes think quite bit really Over last several years us old hands have commented other about ridiculous oversized power plants missized props excess weight fast flying see some newcomers models As way old hands disdainfully dismiss obviously foolhardy choices ignorance shrug shoulders know-it-all way After reflecting problem think can offer explanation total disregard basic aerodynamics wit Theres whole generation modelers have never built trimmed flown Free Flight models consequently dont have foggiest idea thrust settings balance points horizontai verticai fin size prop diameter pitch aircraft speed prop speed structurai air loads etc have dealt model designs Weve seen flying sites fluttering surfaces high-speed stalls wings tails coming off wild structural vibration pitch yaw instability props making terrible noises blade-stall pussycat models becoming wild monsters overweight models dropping like stones 0 RnaJ]y An Engine Mount System Wont Shake Rattle Roll fly model planes dont have tell theres whole lotta shakin goin now theres something cando about Sullivan Flex Mount System Its engine mounting sys tem has specially designed rubber isolators absorb enene vibration reduce noise andi limit wear tear mode thats Flex-Mount comes aluminum adaptor plate makes easy mount 4060 90 two-cycle engines firewall strap mount beam mounting four-cyde engines So dont jitterbug i~lk dealer Suffivan Flex-Mount engine mount j ing system thought rock roll P PRODUCIS wouLd never dieP0 80X5166 Baltimore MD 21224 Getting Better Ideas Off Ground cleaning out undercarriage sorts other gruesome stuff Ive personally seen Goldberg Ultimate SuperTigre S-2500 Midwest Aero Star OS 90 four-stroke Ace 4-40 powered Enya 45CX builder/pilots actually complained vociferously about lack ground clearance suitable prop least man-carrying vehicles pilots life jeopardy Im too comfortable about spectators model No right mind would weld 350-hp Lycoming onto Cessna 150 major structural strengthening careful recalculation numbers jet fighter flying experience However otherwise-rational modelers seem equivalent time kit plans indicate power range designer means isnt fool know larger engine prop safe hed recommend since power options usable design better will sell wonder sometimes whether unscrupulous dealers arent recommending large engines because sell bucks Whatever causative factor factors behooves us use little common Continued page 35 August 1992 33 Flying Fun Continued page 33 horse sense selecting engines props models favorite saying applies Learn mistakes others youll never live long enough make yourself DRIGGS OR CULVER first saw Craig Williamss model identified Driggs Dart told Culver Dart Having wrong once twice before figured off identification some little voice back head kept asking Are sure Just hunch dug Out well-used copy Underwood Collinge s Lightplane Since 1909 page 158 aircraft identified 1935 Dart Monosport G 90-horsepower Lambert identified Al Mooney design Knowing Al moved Wichita Culver bought out Dart Co clarifies confusion Obviously same basic design built both manufacturers indeed both Dart Culver side-by-side photo clearly displays family resemblance since both Dart Cadet quarter-scale also obvious latter considerably smaller As airplane buffs know Culver closed Mooney went produce line private aircraft Texas What isnt well known developed single-place Mooney Mite Wichita before moving watching 1946 AMA Nationals Wichita buddy started looking hangars around Boeing ramps Control Line events held peeked locked wooden temporary structure see tiny all-metal low-wing aircraft looked bit like miniature Mustang no idea what struck underwing air scoop what appeared inverted Crosley automobile engine now youve guessed spying first prototype Mooney Mite Needless say Crosley engine replaced Continental 65 before flights completed Another aside might find interest plant Culvers built still exists now used manufacture another product might have heard aboutColeman lanterns such THE 1939 DART Craig Williams Kansas City scratchbuilt Culver Dart Golden Era Plans John Eaton all-wood no foam does have fiberglass cowl pants Total weight 14 pounds plane powered 05 120 four-stroke swinging 16 x 8 prop Covering Solartex painted Poly U Red Devil urethanes Needless say quarter-scale project out-of-the-rut very impressed realistically gently flew Tell Control Horn Go Wont Get Bent Out 01 Shape airplane enthusiast know has same problems control horns flex bend break-what else new Introducing Sullivan 555 toughest control horn ever made Craftec[with tempered steel instead plastic nickelplated wear resistance Sullivan Control Horn 555 built exacting specifications eliminate flex flutter Better still comes complete glass-filled nylon bushing prevent metal-to-metal contact radio interference sized fit either devises Sullivans New Ball joint System easy off-axis movement Sullivan 555 Finally control horn F PRODUCLS thats made right stuif P0 Box 5166 Baldmore MD 21224 Getting Better Ideas Off Ground really nice companion project Mark Van Sants Culver Cadet featured earlier column Wouldnt neat somehow get Dart Cadet Marvin Reeces Mite air together Hmrnm * Paper Airplanes Continued page 24 project designed stimulate interest aeronautical engineering motivate students pursue careers engineering science project coordinator Ferdinand W Grosveld Lockheed Engineering Sciences Company commented students learned teamwork engineering overlooked powerfully demonstrated recent capture Intelsat satellite Other participants included AIAA Jim Penland Wilmer H Reed III Mohammed Takallu Edgar G Waggoner Virginia Air Space Harley Caroline Hill Greg Selby Ben Continued page 45 August1992 35
Edition: Model Aviation - 1992/08
Page Numbers: 26, 27, 30, 32, 33, 35
Dr D B Mathews STRESS MANAGEMENT HAVE YOU noticed latest hot topic seminars around country stress management hard understand occurs people hobby like better able blow off stresses real world recreational activities nonparticipatory Im talking couch potatoes As matter fact stress management techniques often recommended seminars get hobby certainly excellent solutionas long hobby doesnt become stressful hear flying groups members somehow let themselves get too serious about building flying us make concentrated effort relax have good time Franldy its unfair flier desperately needs stress relief around someone wound up tighter Wakefield After arent flying Fun guess what Im trying say someone obviously stressed remind fun THAT MISSING DRAWING April 1992 column described Brian Ulwins airfoil modifications Goldberg Eagle II promised drawing new airfoil somehow ended up part William McCombss article vertical tail size drawing reprinted issue Raising entry leading edge changed characteristics model attempting show another justification semisymmetrical airfoil set markedly positive angle attack used Whiz 40 project WISH ID THOUGHT OF IT Although 42-page Kit-Builders Guide included abovementioned Ace R/C Whiz 40 kit also available separately carries by-line 26 Model Aviation ccTh 909 N Maize Rd Townhouse 734 Wichita KS 76212 Bill Dunlop Greensburg Pennsylvania built Free Flight electric-powered 44in-span Dornier DO-X HiLine Don Srull drawings Bill Dunlop photo 15/St HINGE TOOL Drawing photograph neat slotting tool Hot Hinges Ace Whiz 40 kit So RimnIA vAt fl nrnctlcal Mary Reese powers 114scale Mooney Mite OS 120 twin other two cylinders dummies plane flies beautifully remarkably aerobatic some hints artwork photos done factory makes neat arrangement reader disagrees suggested techniques can blame Tom Runge staff other hand reader sees something thinks brilliant can take credit really useful suggestions cant take credit designed prevent usual dust-on-everything problem associated sanding model shop Purchase box fan discounter along furnace filter will cover back fan Tape filter onto back run fan sanding fan will draw sawdust filter prevent spreading over room Now wish Id thought Included kit another gadget wish Id invented photo drawing pretty well illustrate use X-Acto blade glued using CyAcyanoacrylate glue between two scraps appropriate wood thickness center thickness surface slotted works amazingly well slotting guide Hot Hinges youve tried freehanding used hinge-slotting tool found slots much too large can appreciate practicality simple little device passing word caution concerning Hot Hinges other fuzzy-surfaced one-piece flexible hinges hinges Continued page 30 August1992 27 Left Side-by-side comparison two Al Mooney-designed airplanes Mark Van Sants Culver Cadet right Craig Williamss Dart left Right Culver Driggs Dart 1/4-scale Craig Williams Overland Park KS Gene Marshall photos canard eita Dan StOCK wing stab motor stick reworked prop hub make pusher Built assistant scoutmaster Joe Utasi Boy Scout competition Modified Leading Edge wing ProfileModified Aileron extended Stock Goldberg Eagle 63 Rib Profile9 Ulwin Drawing showing Brian VIwins airfoil modifications Goldberg Eagle II Raising entry leading edge changed characteristics model Len BlIl Cohen Bob Longstreet 14-foot Taibi Powerhouse Right Jim Saftigs Super Zilch scaled down construction article February 1979 MA recreated photographed Floyd Carter Los Altos California battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will lake through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $275 Cat No 202 Air Cleaner Fine $275 Replacement Inserts Cat No 104 PkI2 Inserts Coarse $239 Cat No 204 PkI2 Inserts Fine $239 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc po Box 3788 Center Line Michigan 48015 Add $250 shipping igan residents add 4% sales taxi Models War/Maxwell Continued page 29 Wisconsin scheduled refurbished displayed near future Ventura Division Northrop Aircraft Inc predecessor Radioplane Company produced target drones 1930s 1940s surprisingly enough owns single wartime drone Its packed away warehouse Although box labeled OQ-2A drone actually OQ-2B since wing ribs have lightening holes fuselage uncovered revealing welded steel tube construction showing receiver servo Fred T Collins Pittsburgh Pennsylvania has built full-scale flying replica OQ-2A Judging both pictures Ive seen Freds description its flying characteristics drone masterpiece people have mistaken real thing Freds model weighs 48 pounds original weighed 108 pounds Fred Collinss address 29 Stewart Avenue Pittsburgh PA 15227 enormous interest recreational RC activities seen today probably stimulated least part servicemens wartime exposure target drones us served wartime drone units have unique distinction grandchildren ask What did war Grandpa can answer flew model alrplanes Send comments anecdotes 413 East 6th Street Clare MI 48617 call 519 386-2574 ng Fun/Mathews Continued page 27 immensely appealing since much easier install yet seem just durable older hinge designs mentioned previous column problems hinge failures Ive found problem slots too thick using mediumviscosity CyA dont work folks slots dont fill completely CyA doesnt flow properly results hinges marginal safety Hot Hinges need fit quite snugly slots should adhered thin CyA Use microapplicator tips such ones PlC will deliver wellcontrolled flow thin CyA allowing wick osmosis along fuzzy hinge layer Just dont overfill enough create hinge block joint Continued page 32 fl RI IV ALOBEE GLOW PLUGS osophy. atureta QuadrasZenoahs AEM Sachs others 5 Aircraft quality 6061 T6 aluninure Mounts sade length require * 5oy degree right doan thrust builtin * HeliArc welded licensed A&P Mechanics * Starting $4995 5tH A1imi-d Qut Memis 2237 tillington Dr HarveyLA 70058 904 7319710 CHECK- MONEY ORDER B&P Associates Gives Total Flight Line FREEDOM SUPER CHEETAHUNBREAKABLE FUSELAGE Span 64 Area 496 sq Weight 34 oz approx Loading 1045 az/sq ft $5295 Plus Tax & Shipping Slope Acrobatic/Combat Gliders CHEETAH MODELSDEALER INQUIRY IN VI TED 14725 Bessemer St B 818 781-4544 Van Nuys CA 91411 30 Model Aviation SM-4 Throttle Opto-isolator no Rx noise High-rate low Motor losses SMPOONOO ifi-Pewer MOSFETs Surface mount reliability Sermos connectors staadard Muazted heatsink case Futaba J lead staasdard Small 10 x z 0 15 ounce Optimized 7 24 cells dip coupon special $99 JOMAR PRODUCTS 8606 Susanview Ln Cinti OH 45244 513474-0985 Pfeaae Inalud $2 Shipping MC & VI8a Accpmdl Renege tedCSA Cent fedAedeien F eNo5p F eNoPenner E26226R25 54Predacts es Only certified checks money orders accepted Minimum order 81400 three paokageuof4Powerpoles $400 per package 0200 shipping end handlingi CT residents add sales tao Prices subject change mithout notice DEALER INQUIRIES INVITED farther information deole prices send SASS Business Card SERMOS RIC SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 0690512031322-6294 Flying Fun Continued page 30 sealed hinge technique mentioned several columns ago used surfaces hinged before covering anyway Controlling runoff nearly critical since CyA isnt going run over covering Use X-Acto tool thin CyA applicator tips youll very satisfied FOURTEEN FEET WITH 12-OUNCE WING LOADING Bill Cohen Paso Robles California constructed double-size Taibi powerhouse 1978 monster models rare Bill suffered disabling injury what refers murder cycle year flying buddy Bob Longstreet suggested build b-i-i-g plane get Bills mind off being confined wheelchair going fly nonstop Ontario California Las Vegas After kicking idea around perusing quite few sets plans decided pal Sal Taibis Powerhouse Bob Sliff Hobby Horn plans blown up double size called Sal told him what mind agreed cut wood Superior Aircraft Materials see ad issue project after first advising us surely certifiably crazy Have ever seen piece /16 x /16 spruce 10 feet long able cut two wing ribs sheet /32 x 4 x 48 balsa wing area came out 4704 sq total weight 25 1/4 lb works out about 12-ounce wing loading 13 ribs wing panel four separate center section two sections joined 1/4 wire rod running brass tubing two large hooks hold six #64 rubberbands tension through cutout center ribs landing gear made 1/4 drill rod Sal bent house wife Nan standing bench hold down early days jumbo models werent big accessories like wheels control horns like largest wheels could buy six-inch Cub types undercarriage weighs nearly five pounds roughly 20% total aircraft weight first used fiberglass pushrods controls changed pull-pull cables eliminate slop surfaces made real believer out Now opt build convert Old-Timer use cable systems took nine large rolls MonoKote cover 20 bottles CyA two large containers white glue remembers what else First flight old Ontario Motor Speedway parking lot attended myself Sal Bob wives monster Bob flying took off about 15 20 feet flew like proverbial baby carriage will fly forever just above idle Quadra 35 Landing another matter literally does want come down took almost entire length parking lot settle onto its wheels wheelchair Bobs knees shaking hard could never have walked Sal ran down retrieve hauled back tail shoulder Quite sight few years ago Sals Powerhouse float drawings blown up double size Since double Powerhouse still flyable Id like build have really big ROW Now project certainly fits description Flying Fun doesnt ENOUGH POWER During emergency phone call above subject asked Bill Cohen Quadra 35 Powerhouse wasnt bit too much power responded chuckle said really dont know Ive never flown over half throttle both agreed that judicious model would very likely wildly unstable probably outside its structural strength limits brings up area does seem well understood modelers new hobbypower-to-weight ratios 14-foot Powerhouse weighed 50 pounds Quadra would likely provide barely enough power propped some sort high-pitch unit would take much longer take off would fly vastly faster once unloaded point power must matched aircraft raw size minor consideration Im reminded experience Air Force days clearly illustrates danger over-powering aircraft Back aerial refueling tanker available TAC Boeing KB-SO few KC-97s belonged SAC set up boom refueling systems KB-SO relatively satisfactory probe-and-drogue configuration refuel F-86 F-84 fighter bombers However North American F-100 Super Sabre came squadron use quickly apparent KB-SO barely fast enough higher altitudes stay above stall speed F-lO0 actually flew along mission really legal dentist lots fun tanker flown 150 dive F-84Fs staggering around nearly stalled trying best get hooked up interim solution send KB-SOs off Hayes aircraft Birmingham Alabama fitted supplemental pair J-47 jet engines modification possible fly QUICK-BUILT SUPER TOUGH 5 AirCore 40 faniPy Trainer Explorer Floats NEW VHS VIDEO CATALOG $695 &h Tessa resalents pleaae add sales tax US Air Core 4576 claire Chennaull Hangar 7 Dallas TX 75248 1-800-336-0602 orders 214 250-1914 info above fighters stall speed other severe problems encountered nearly invalidated KB-50J project startling observations Ive ever made during refueling flight off Texas coast early morning KB-50J jets pair F-lOOs refueling happened glance pilots hands discovered flying airplane trim tabs No use control column recovered composure enough ask advised thatalthough didnt really want known otherwise darned airplane would porpoise badly could held level nearly uncontrollable J-47s running Additionally aithough Hayes Air reinforced some criticai areas Boeing aircraft handle additional speedimposed loads extremely maintenance prone ally verging unsafe flight line fire station right next door dentai clinic used haif-jokingly tease crash crews about spending day flight line whenthe KB-50Js flying safety record frankly very poor numerous accessory failures such loss pressurization blown windows fuel system failures failure electronic gear vibration levels loss access panels flight high-speed flutter stress cracks vibration-associated failures perfectly useful aircraft good safety record admired flying characteristics overpowered overstressed well outside Boeings original design limits result turkey So what does have model airplanes think quite bit really Over last several years us old hands have commented other about ridiculous oversized power plants missized props excess weight fast flying see some newcomers models As way old hands disdainfully dismiss obviously foolhardy choices ignorance shrug shoulders know-it-all way After reflecting problem think can offer explanation total disregard basic aerodynamics wit Theres whole generation modelers have never built trimmed flown Free Flight models consequently dont have foggiest idea thrust settings balance points horizontai verticai fin size prop diameter pitch aircraft speed prop speed structurai air loads etc have dealt model designs Weve seen flying sites fluttering surfaces high-speed stalls wings tails coming off wild structural vibration pitch yaw instability props making terrible noises blade-stall pussycat models becoming wild monsters overweight models dropping like stones 0 RnaJ]y An Engine Mount System Wont Shake Rattle Roll fly model planes dont have tell theres whole lotta shakin goin now theres something cando about Sullivan Flex Mount System Its engine mounting sys tem has specially designed rubber isolators absorb enene vibration reduce noise andi limit wear tear mode thats Flex-Mount comes aluminum adaptor plate makes easy mount 4060 90 two-cycle engines firewall strap mount beam mounting four-cyde engines So dont jitterbug i~lk dealer Suffivan Flex-Mount engine mount j ing system thought rock roll P PRODUCIS wouLd never dieP0 80X5166 Baltimore MD 21224 Getting Better Ideas Off Ground cleaning out undercarriage sorts other gruesome stuff Ive personally seen Goldberg Ultimate SuperTigre S-2500 Midwest Aero Star OS 90 four-stroke Ace 4-40 powered Enya 45CX builder/pilots actually complained vociferously about lack ground clearance suitable prop least man-carrying vehicles pilots life jeopardy Im too comfortable about spectators model No right mind would weld 350-hp Lycoming onto Cessna 150 major structural strengthening careful recalculation numbers jet fighter flying experience However otherwise-rational modelers seem equivalent time kit plans indicate power range designer means isnt fool know larger engine prop safe hed recommend since power options usable design better will sell wonder sometimes whether unscrupulous dealers arent recommending large engines because sell bucks Whatever causative factor factors behooves us use little common Continued page 35 August 1992 33 Flying Fun Continued page 33 horse sense selecting engines props models favorite saying applies Learn mistakes others youll never live long enough make yourself DRIGGS OR CULVER first saw Craig Williamss model identified Driggs Dart told Culver Dart Having wrong once twice before figured off identification some little voice back head kept asking Are sure Just hunch dug Out well-used copy Underwood Collinge s Lightplane Since 1909 page 158 aircraft identified 1935 Dart Monosport G 90-horsepower Lambert identified Al Mooney design Knowing Al moved Wichita Culver bought out Dart Co clarifies confusion Obviously same basic design built both manufacturers indeed both Dart Culver side-by-side photo clearly displays family resemblance since both Dart Cadet quarter-scale also obvious latter considerably smaller As airplane buffs know Culver closed Mooney went produce line private aircraft Texas What isnt well known developed single-place Mooney Mite Wichita before moving watching 1946 AMA Nationals Wichita buddy started looking hangars around Boeing ramps Control Line events held peeked locked wooden temporary structure see tiny all-metal low-wing aircraft looked bit like miniature Mustang no idea what struck underwing air scoop what appeared inverted Crosley automobile engine now youve guessed spying first prototype Mooney Mite Needless say Crosley engine replaced Continental 65 before flights completed Another aside might find interest plant Culvers built still exists now used manufacture another product might have heard aboutColeman lanterns such THE 1939 DART Craig Williams Kansas City scratchbuilt Culver Dart Golden Era Plans John Eaton all-wood no foam does have fiberglass cowl pants Total weight 14 pounds plane powered 05 120 four-stroke swinging 16 x 8 prop Covering Solartex painted Poly U Red Devil urethanes Needless say quarter-scale project out-of-the-rut very impressed realistically gently flew Tell Control Horn Go Wont Get Bent Out 01 Shape airplane enthusiast know has same problems control horns flex bend break-what else new Introducing Sullivan 555 toughest control horn ever made Craftec[with tempered steel instead plastic nickelplated wear resistance Sullivan Control Horn 555 built exacting specifications eliminate flex flutter Better still comes complete glass-filled nylon bushing prevent metal-to-metal contact radio interference sized fit either devises Sullivans New Ball joint System easy off-axis movement Sullivan 555 Finally control horn F PRODUCLS thats made right stuif P0 Box 5166 Baldmore MD 21224 Getting Better Ideas Off Ground really nice companion project Mark Van Sants Culver Cadet featured earlier column Wouldnt neat somehow get Dart Cadet Marvin Reeces Mite air together Hmrnm * Paper Airplanes Continued page 24 project designed stimulate interest aeronautical engineering motivate students pursue careers engineering science project coordinator Ferdinand W Grosveld Lockheed Engineering Sciences Company commented students learned teamwork engineering overlooked powerfully demonstrated recent capture Intelsat satellite Other participants included AIAA Jim Penland Wilmer H Reed III Mohammed Takallu Edgar G Waggoner Virginia Air Space Harley Caroline Hill Greg Selby Ben Continued page 45 August1992 35
Edition: Model Aviation - 1992/08
Page Numbers: 26, 27, 30, 32, 33, 35
Dr D B Mathews STRESS MANAGEMENT HAVE YOU noticed latest hot topic seminars around country stress management hard understand occurs people hobby like better able blow off stresses real world recreational activities nonparticipatory Im talking couch potatoes As matter fact stress management techniques often recommended seminars get hobby certainly excellent solutionas long hobby doesnt become stressful hear flying groups members somehow let themselves get too serious about building flying us make concentrated effort relax have good time Franldy its unfair flier desperately needs stress relief around someone wound up tighter Wakefield After arent flying Fun guess what Im trying say someone obviously stressed remind fun THAT MISSING DRAWING April 1992 column described Brian Ulwins airfoil modifications Goldberg Eagle II promised drawing new airfoil somehow ended up part William McCombss article vertical tail size drawing reprinted issue Raising entry leading edge changed characteristics model attempting show another justification semisymmetrical airfoil set markedly positive angle attack used Whiz 40 project WISH ID THOUGHT OF IT Although 42-page Kit-Builders Guide included abovementioned Ace R/C Whiz 40 kit also available separately carries by-line 26 Model Aviation ccTh 909 N Maize Rd Townhouse 734 Wichita KS 76212 Bill Dunlop Greensburg Pennsylvania built Free Flight electric-powered 44in-span Dornier DO-X HiLine Don Srull drawings Bill Dunlop photo 15/St HINGE TOOL Drawing photograph neat slotting tool Hot Hinges Ace Whiz 40 kit So RimnIA vAt fl nrnctlcal Mary Reese powers 114scale Mooney Mite OS 120 twin other two cylinders dummies plane flies beautifully remarkably aerobatic some hints artwork photos done factory makes neat arrangement reader disagrees suggested techniques can blame Tom Runge staff other hand reader sees something thinks brilliant can take credit really useful suggestions cant take credit designed prevent usual dust-on-everything problem associated sanding model shop Purchase box fan discounter along furnace filter will cover back fan Tape filter onto back run fan sanding fan will draw sawdust filter prevent spreading over room Now wish Id thought Included kit another gadget wish Id invented photo drawing pretty well illustrate use X-Acto blade glued using CyAcyanoacrylate glue between two scraps appropriate wood thickness center thickness surface slotted works amazingly well slotting guide Hot Hinges youve tried freehanding used hinge-slotting tool found slots much too large can appreciate practicality simple little device passing word caution concerning Hot Hinges other fuzzy-surfaced one-piece flexible hinges hinges Continued page 30 August1992 27 Left Side-by-side comparison two Al Mooney-designed airplanes Mark Van Sants Culver Cadet right Craig Williamss Dart left Right Culver Driggs Dart 1/4-scale Craig Williams Overland Park KS Gene Marshall photos canard eita Dan StOCK wing stab motor stick reworked prop hub make pusher Built assistant scoutmaster Joe Utasi Boy Scout competition Modified Leading Edge wing ProfileModified Aileron extended Stock Goldberg Eagle 63 Rib Profile9 Ulwin Drawing showing Brian VIwins airfoil modifications Goldberg Eagle II Raising entry leading edge changed characteristics model Len BlIl Cohen Bob Longstreet 14-foot Taibi Powerhouse Right Jim Saftigs Super Zilch scaled down construction article February 1979 MA recreated photographed Floyd Carter Los Altos California battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will lake through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $275 Cat No 202 Air Cleaner Fine $275 Replacement Inserts Cat No 104 PkI2 Inserts Coarse $239 Cat No 204 PkI2 Inserts Fine $239 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc po Box 3788 Center Line Michigan 48015 Add $250 shipping igan residents add 4% sales taxi Models War/Maxwell Continued page 29 Wisconsin scheduled refurbished displayed near future Ventura Division Northrop Aircraft Inc predecessor Radioplane Company produced target drones 1930s 1940s surprisingly enough owns single wartime drone Its packed away warehouse Although box labeled OQ-2A drone actually OQ-2B since wing ribs have lightening holes fuselage uncovered revealing welded steel tube construction showing receiver servo Fred T Collins Pittsburgh Pennsylvania has built full-scale flying replica OQ-2A Judging both pictures Ive seen Freds description its flying characteristics drone masterpiece people have mistaken real thing Freds model weighs 48 pounds original weighed 108 pounds Fred Collinss address 29 Stewart Avenue Pittsburgh PA 15227 enormous interest recreational RC activities seen today probably stimulated least part servicemens wartime exposure target drones us served wartime drone units have unique distinction grandchildren ask What did war Grandpa can answer flew model alrplanes Send comments anecdotes 413 East 6th Street Clare MI 48617 call 519 386-2574 ng Fun/Mathews Continued page 27 immensely appealing since much easier install yet seem just durable older hinge designs mentioned previous column problems hinge failures Ive found problem slots too thick using mediumviscosity CyA dont work folks slots dont fill completely CyA doesnt flow properly results hinges marginal safety Hot Hinges need fit quite snugly slots should adhered thin CyA Use microapplicator tips such ones PlC will deliver wellcontrolled flow thin CyA allowing wick osmosis along fuzzy hinge layer Just dont overfill enough create hinge block joint Continued page 32 fl RI IV ALOBEE GLOW PLUGS osophy. atureta QuadrasZenoahs AEM Sachs others 5 Aircraft quality 6061 T6 aluninure Mounts sade length require * 5oy degree right doan thrust builtin * HeliArc welded licensed A&P Mechanics * Starting $4995 5tH A1imi-d Qut Memis 2237 tillington Dr HarveyLA 70058 904 7319710 CHECK- MONEY ORDER B&P Associates Gives Total Flight Line FREEDOM SUPER CHEETAHUNBREAKABLE FUSELAGE Span 64 Area 496 sq Weight 34 oz approx Loading 1045 az/sq ft $5295 Plus Tax & Shipping Slope Acrobatic/Combat Gliders CHEETAH MODELSDEALER INQUIRY IN VI TED 14725 Bessemer St B 818 781-4544 Van Nuys CA 91411 30 Model Aviation SM-4 Throttle Opto-isolator no Rx noise High-rate low Motor losses SMPOONOO ifi-Pewer MOSFETs Surface mount reliability Sermos connectors staadard Muazted heatsink case Futaba J lead staasdard Small 10 x z 0 15 ounce Optimized 7 24 cells dip coupon special $99 JOMAR PRODUCTS 8606 Susanview Ln Cinti OH 45244 513474-0985 Pfeaae Inalud $2 Shipping MC & VI8a Accpmdl Renege tedCSA Cent fedAedeien F eNo5p F eNoPenner E26226R25 54Predacts es Only certified checks money orders accepted Minimum order 81400 three paokageuof4Powerpoles $400 per package 0200 shipping end handlingi CT residents add sales tao Prices subject change mithout notice DEALER INQUIRIES INVITED farther information deole prices send SASS Business Card SERMOS RIC SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 0690512031322-6294 Flying Fun Continued page 30 sealed hinge technique mentioned several columns ago used surfaces hinged before covering anyway Controlling runoff nearly critical since CyA isnt going run over covering Use X-Acto tool thin CyA applicator tips youll very satisfied FOURTEEN FEET WITH 12-OUNCE WING LOADING Bill Cohen Paso Robles California constructed double-size Taibi powerhouse 1978 monster models rare Bill suffered disabling injury what refers murder cycle year flying buddy Bob Longstreet suggested build b-i-i-g plane get Bills mind off being confined wheelchair going fly nonstop Ontario California Las Vegas After kicking idea around perusing quite few sets plans decided pal Sal Taibis Powerhouse Bob Sliff Hobby Horn plans blown up double size called Sal told him what mind agreed cut wood Superior Aircraft Materials see ad issue project after first advising us surely certifiably crazy Have ever seen piece /16 x /16 spruce 10 feet long able cut two wing ribs sheet /32 x 4 x 48 balsa wing area came out 4704 sq total weight 25 1/4 lb works out about 12-ounce wing loading 13 ribs wing panel four separate center section two sections joined 1/4 wire rod running brass tubing two large hooks hold six #64 rubberbands tension through cutout center ribs landing gear made 1/4 drill rod Sal bent house wife Nan standing bench hold down early days jumbo models werent big accessories like wheels control horns like largest wheels could buy six-inch Cub types undercarriage weighs nearly five pounds roughly 20% total aircraft weight first used fiberglass pushrods controls changed pull-pull cables eliminate slop surfaces made real believer out Now opt build convert Old-Timer use cable systems took nine large rolls MonoKote cover 20 bottles CyA two large containers white glue remembers what else First flight old Ontario Motor Speedway parking lot attended myself Sal Bob wives monster Bob flying took off about 15 20 feet flew like proverbial baby carriage will fly forever just above idle Quadra 35 Landing another matter literally does want come down took almost entire length parking lot settle onto its wheels wheelchair Bobs knees shaking hard could never have walked Sal ran down retrieve hauled back tail shoulder Quite sight few years ago Sals Powerhouse float drawings blown up double size Since double Powerhouse still flyable Id like build have really big ROW Now project certainly fits description Flying Fun doesnt ENOUGH POWER During emergency phone call above subject asked Bill Cohen Quadra 35 Powerhouse wasnt bit too much power responded chuckle said really dont know Ive never flown over half throttle both agreed that judicious model would very likely wildly unstable probably outside its structural strength limits brings up area does seem well understood modelers new hobbypower-to-weight ratios 14-foot Powerhouse weighed 50 pounds Quadra would likely provide barely enough power propped some sort high-pitch unit would take much longer take off would fly vastly faster once unloaded point power must matched aircraft raw size minor consideration Im reminded experience Air Force days clearly illustrates danger over-powering aircraft Back aerial refueling tanker available TAC Boeing KB-SO few KC-97s belonged SAC set up boom refueling systems KB-SO relatively satisfactory probe-and-drogue configuration refuel F-86 F-84 fighter bombers However North American F-100 Super Sabre came squadron use quickly apparent KB-SO barely fast enough higher altitudes stay above stall speed F-lO0 actually flew along mission really legal dentist lots fun tanker flown 150 dive F-84Fs staggering around nearly stalled trying best get hooked up interim solution send KB-SOs off Hayes aircraft Birmingham Alabama fitted supplemental pair J-47 jet engines modification possible fly QUICK-BUILT SUPER TOUGH 5 AirCore 40 faniPy Trainer Explorer Floats NEW VHS VIDEO CATALOG $695 &h Tessa resalents pleaae add sales tax US Air Core 4576 claire Chennaull Hangar 7 Dallas TX 75248 1-800-336-0602 orders 214 250-1914 info above fighters stall speed other severe problems encountered nearly invalidated KB-50J project startling observations Ive ever made during refueling flight off Texas coast early morning KB-50J jets pair F-lOOs refueling happened glance pilots hands discovered flying airplane trim tabs No use control column recovered composure enough ask advised thatalthough didnt really want known otherwise darned airplane would porpoise badly could held level nearly uncontrollable J-47s running Additionally aithough Hayes Air reinforced some criticai areas Boeing aircraft handle additional speedimposed loads extremely maintenance prone ally verging unsafe flight line fire station right next door dentai clinic used haif-jokingly tease crash crews about spending day flight line whenthe KB-50Js flying safety record frankly very poor numerous accessory failures such loss pressurization blown windows fuel system failures failure electronic gear vibration levels loss access panels flight high-speed flutter stress cracks vibration-associated failures perfectly useful aircraft good safety record admired flying characteristics overpowered overstressed well outside Boeings original design limits result turkey So what does have model airplanes think quite bit really Over last several years us old hands have commented other about ridiculous oversized power plants missized props excess weight fast flying see some newcomers models As way old hands disdainfully dismiss obviously foolhardy choices ignorance shrug shoulders know-it-all way After reflecting problem think can offer explanation total disregard basic aerodynamics wit Theres whole generation modelers have never built trimmed flown Free Flight models consequently dont have foggiest idea thrust settings balance points horizontai verticai fin size prop diameter pitch aircraft speed prop speed structurai air loads etc have dealt model designs Weve seen flying sites fluttering surfaces high-speed stalls wings tails coming off wild structural vibration pitch yaw instability props making terrible noises blade-stall pussycat models becoming wild monsters overweight models dropping like stones 0 RnaJ]y An Engine Mount System Wont Shake Rattle Roll fly model planes dont have tell theres whole lotta shakin goin now theres something cando about Sullivan Flex Mount System Its engine mounting sys tem has specially designed rubber isolators absorb enene vibration reduce noise andi limit wear tear mode thats Flex-Mount comes aluminum adaptor plate makes easy mount 4060 90 two-cycle engines firewall strap mount beam mounting four-cyde engines So dont jitterbug i~lk dealer Suffivan Flex-Mount engine mount j ing system thought rock roll P PRODUCIS wouLd never dieP0 80X5166 Baltimore MD 21224 Getting Better Ideas Off Ground cleaning out undercarriage sorts other gruesome stuff Ive personally seen Goldberg Ultimate SuperTigre S-2500 Midwest Aero Star OS 90 four-stroke Ace 4-40 powered Enya 45CX builder/pilots actually complained vociferously about lack ground clearance suitable prop least man-carrying vehicles pilots life jeopardy Im too comfortable about spectators model No right mind would weld 350-hp Lycoming onto Cessna 150 major structural strengthening careful recalculation numbers jet fighter flying experience However otherwise-rational modelers seem equivalent time kit plans indicate power range designer means isnt fool know larger engine prop safe hed recommend since power options usable design better will sell wonder sometimes whether unscrupulous dealers arent recommending large engines because sell bucks Whatever causative factor factors behooves us use little common Continued page 35 August 1992 33 Flying Fun Continued page 33 horse sense selecting engines props models favorite saying applies Learn mistakes others youll never live long enough make yourself DRIGGS OR CULVER first saw Craig Williamss model identified Driggs Dart told Culver Dart Having wrong once twice before figured off identification some little voice back head kept asking Are sure Just hunch dug Out well-used copy Underwood Collinge s Lightplane Since 1909 page 158 aircraft identified 1935 Dart Monosport G 90-horsepower Lambert identified Al Mooney design Knowing Al moved Wichita Culver bought out Dart Co clarifies confusion Obviously same basic design built both manufacturers indeed both Dart Culver side-by-side photo clearly displays family resemblance since both Dart Cadet quarter-scale also obvious latter considerably smaller As airplane buffs know Culver closed Mooney went produce line private aircraft Texas What isnt well known developed single-place Mooney Mite Wichita before moving watching 1946 AMA Nationals Wichita buddy started looking hangars around Boeing ramps Control Line events held peeked locked wooden temporary structure see tiny all-metal low-wing aircraft looked bit like miniature Mustang no idea what struck underwing air scoop what appeared inverted Crosley automobile engine now youve guessed spying first prototype Mooney Mite Needless say Crosley engine replaced Continental 65 before flights completed Another aside might find interest plant Culvers built still exists now used manufacture another product might have heard aboutColeman lanterns such THE 1939 DART Craig Williams Kansas City scratchbuilt Culver Dart Golden Era Plans John Eaton all-wood no foam does have fiberglass cowl pants Total weight 14 pounds plane powered 05 120 four-stroke swinging 16 x 8 prop Covering Solartex painted Poly U Red Devil urethanes Needless say quarter-scale project out-of-the-rut very impressed realistically gently flew Tell Control Horn Go Wont Get Bent Out 01 Shape airplane enthusiast know has same problems control horns flex bend break-what else new Introducing Sullivan 555 toughest control horn ever made Craftec[with tempered steel instead plastic nickelplated wear resistance Sullivan Control Horn 555 built exacting specifications eliminate flex flutter Better still comes complete glass-filled nylon bushing prevent metal-to-metal contact radio interference sized fit either devises Sullivans New Ball joint System easy off-axis movement Sullivan 555 Finally control horn F PRODUCLS thats made right stuif P0 Box 5166 Baldmore MD 21224 Getting Better Ideas Off Ground really nice companion project Mark Van Sants Culver Cadet featured earlier column Wouldnt neat somehow get Dart Cadet Marvin Reeces Mite air together Hmrnm * Paper Airplanes Continued page 24 project designed stimulate interest aeronautical engineering motivate students pursue careers engineering science project coordinator Ferdinand W Grosveld Lockheed Engineering Sciences Company commented students learned teamwork engineering overlooked powerfully demonstrated recent capture Intelsat satellite Other participants included AIAA Jim Penland Wilmer H Reed III Mohammed Takallu Edgar G Waggoner Virginia Air Space Harley Caroline Hill Greg Selby Ben Continued page 45 August1992 35