THEYRE EASY AND FAST make theyll add very little weight airplane Since skis impart degree stability model wheels may find did reduce ground looping tendency takeoff landing plywood skis lighter metal ones have seen also use knee action positioning system closer full-scale torque rod system article describes procedures making ski Double parts making main gear set making nose gear length width measurements will have modified Suggested full-size templates parts included Construction Cut ski blank shown photo sheet A-in thick birch model aircraft plywood Lite Ply door covering making main gear ski 40- 60-size ship appropriate size would order 2 wide 12 long Round point nose liking round sides edges Straight sides sharp edges give ski its good tracking properties Make mold press piece 2 x 4 approximately 18 long Draw two parallel lines extending lengthwise 34 in from top bottom edges Trace 4-in radius arc lower horizontal line upper intersecting about Carefully cut along line band saw separate two pieces leaving slightly exaggerated profile ski see photo Temporarily insert few small A-in scrap plywood spacers along cut line represent thickness ski blank will inserted shaping Clamp two pieces back together drill %-in hole edge-to-edge about 1 forward tip radius arc front end Measuring front end radius arc curve drill another %-in hole exactly length ski blank rear bolt will go through Top Authors 66-in-span 11-lb Big Firecat trucks low approach flaps down skis set light touch down Above Left Shown wood parts skI Gussets 1/a-In-sq spruce balsa shown full-size parts layout Above Right Band saw cut line shown heavy black 18-in-iong 2 x 4 mold Rear bolt stops blank sliding rearward during clamping 52 Model Aviation Left After marking centerline pivot point axle marked about 40% forward trailing edge 12-in ski 5 rear works well Right wood parts assembled except keel Note gentle graceful curve upward skis dont have pug-nosed hole will act stop prevent blank slipping rearward clamp mold Insert 41h-in-long 5A6-indiameter carriage bolt washers end hole tighten nuts mold finished youre ready form ski Note 3A-in hole 546-in bolt intentionally sloppy fit reasons will clear later Bring pan water rapid boil kitchen stove thrust front four inches ski blank three minutes shown photo Have mold ready three minutes up immediately position ski mold rear ski just touches rear bolt Quickly tighten down both bolts ski blank forced curve mold see photo Remember ski will relax spring back bit take out mold bit overcurve excess tension necessary mold Allow dry several hours front fireplace overnight shop Make second ski exactly same way preferably same piece plywood making set trike gear ship shorten narrow dimensions nose gear ski Seven inches long inch-and-a-half wide works well 40- 60-size airplane Mold using method described above same mold can drill second hole rear stop bolt like Cut spine doubler parts again using A-in ply Dont sand anything yet ski will look better sand after parts glued together Mark centerlines top bottom three skis main skis put mark 5 rear will serve locator point axle shaft see photo find point Left fully assembled ski keel glued bottom keel position approximate should generally rear Right hole axle bushing being drilled through diamond-shaped doubler Use care get hole absolutely square February 1989 53 Left Make sure immerse least four inches birch plywood ski blank rapidly boiling water three minutes make pliable Right Clamp ski blank shaped mold let dry thoroughly Preferably should allow overnight photos Ed Barton Left Axle bushing being pressed spine Note use scrap plywood prevent jaw pliers damaging doubler Right Marking intersection landing gear wire %2-in anchor point see text alternate method Wire bends easily annealed first Left Wrap joint bright copper wire solder using hot heavy iron Silver solder 90% tin 4% silver sold hardware stores works well must use flux Right Final assembly showing cable spring attachments Seal paint skis before attaching cables nose gear ski lay flat surface such workbench kitchen counter view side ground level Mark point ski just begins curve up away surface axle point should exactly halfway between point rear edge ski Using slow-setting epoxy carefully glue spines /8-in-sq balsa spruce gussets onto three skis Soft spruce best hard balsa will work nearly well omit gussets add great deal strength handle side loads may necessary sand little curve bottom edge nose gear ski spine make match ski profile certain epoxy sets axle locations remain exactly above respective marks skis spines remain straight respect centerlines dry epoxy diamondshaped doublers spines shown Round front rear ends keels sandpaper epoxy along bottom centerlines skis see photos After determining diameter axle shafts use drill press drill hole 1/16 larger figure through exact center doublers ski Make sure hole square possible relation ski see photo Cut %-in-long piece brass tubing outside diameter same size drill gently tap press hole form bushing see photo Drill /16 hole end spine shown youre ready sand finish ski Sand enough remove fuzz splinters dont overdo Again round bottom edges skisas full-size skis sharper better track snow However neatly rounded edge spine doublers will make nicer looking ski Attaching skis type landing gear ship will determine what kind anchor points will need plane has wire gear legs follow paragraph has dural aluminum gear go paragraph B Whether landing gear legs airplane emerge wing fuselage step basically same Bend small hook about A-in diameter end piece %2-in music wire easiest way to anneal first heating cherry-red propane torch flame letting cool slowly Using wire bending gadgets available will also help Remove wheel gear leg Holding wire hook will call anchor point now about 2 above axle shaft using permanent marker mark both anchor point gear leg meet see photo Bend end anchor point parallel gear leg cut off about inch beyond bend Rough up file Dremel tool bind solder gear leg hook itself 2 above axle shown photo Ualess using 4-in-dia wheels spacing will allow reattach wheels airplane removing anchor points Repeat procedure exactly other gear leg B plane has dural gear youre luck easier two methods Cut two rounded teardrop54 Model Aviation 1-ULL SIZE PARTS TEMPLATES ALL PARTS OF 1/8-IN BIRCH PLYWOOD UNLESS OTHERWISE NOTED MAIN SKI PATTERN N LONG 00 MAIN SKI SPINE MAIN SKINOSE SKI DOUBLERDOUBLE R NOSE SKI SPINE MAIN SKI KEEL N PLYWOOD NOSE SKI KEEL IN PLYWOOD SECTION THROUGH CENTER OF SKI AT AXLE HOLE NOSE SKI PATTERN IL U V Left Alternate anchor point dural gear Pattern drawn 1A6-in aluminum Right Finished alternate anchor point note 2-in centers Left Here alternate anchor point place Slight outward bend places top hole directly over center spine Right Berklcy Steeion excellent material use cables An S-hook easiest way attach forward end spring spine shaped anchor points A6-thick aluminum shown templates see photo Drill A-in-dia hole small end large end drill hole exactly fit axle threads distance center center two holes should 1 / 2 exact length critical long two pieces identical see photo Remove axle shafts insert threaded ends through larger holes reassemble tightening securely anchor points should inside landing gear oriented straight up axle can bend small angle outward near top anchor points put A-in hole directly over ski center isnt necessary see photo Depending type nose gear ship has may have use little ingenuity installing anchor point spring cable look illustrations should give enough ideas work Most sport aircraft use straight nose gear leg short wire loop anchor point soldered two inches above axle will work fine Finish skis according favorite method keep light used Sherwin-Williams Zelon primer red automotive engine paint epoxy finish such K&B Hobby Poxy would probably better keep bottoms glass-smooth wax good automotive wax before first take out couple times year thereafter Mounting adjusting skis Install both main skis using wheel collars both sides necessary keep binding must swivel freely axles Sunbelters curved end goes front curving up Suspend ship its wing tips eyeball angle about 50 nose-up ski Loop piece steel cable Steelon brand nylon-covered fishing leader great anchor point above axle A6 hole rear end spine have angle set crimp using small lengths brass aluminum tubing shown photo sets angle-of-attack ski gentle finger pressure rear edge ski should raise its nose beyond angle Duplicate angle exactly other main ski have dural gear happen get aligmnent off hair can just loosen axle rotate anchor point bit final step youll need find couple identical wire springsapproxi mately 3A6-in dia couple inches long will local hardware store should have assortment junk box doesnt really impatient couple #64 rubberbands will work Err side making springs rubberbands too weak rather too strong make too strong could exert enough leverage nose over lightweight tail-dragger Install springs anchor point above axle front end spine After doing test knee-action skis pressing down front end finger should give easily spring quickly back original position released Make sure tight pulling down couple inches letting go anchor points loose cheated using smaller wire youll find out specified %2-in wire paragraph anything smaller will bend out shape under leverage would ordinarily no problem except two skis return fairly close identical nose-up position will find asymmetrical flight load skisa situation sufficient set heart popping like pacemaker microwave cook-off until get bird ground again tip arrive field set model car hood tailgate several minutes before put down snow set warm skis directly snow will melt little freeze chunks snow ice sticking bottoms Its easy tell youve done takes full power taxi out after snow has disappeared youll find can still fly skis until grass greens up Just sure stay grass similarly cushioned surface Asphalt other hard-surface runways eat up keels first 20 ft ugly things nice Continued page 164 56 Model Aviation everyone seemed have great time special thanks workers made such great race missed missed good always next year TOP 10 FINISHERS NMPRA 0500 Championship Race P1 Racer 1 AlIen 2 Bartle 3 Gates 4 Benezra 5 Eide 6 Johnson 7 Greer 8 Klien 9 Demay 10 Cranfill Plane V-Tail UT-Tail Scat Oat V-Tail 0500 0500 Q500 0500 Q500 Q500 Ricky Eng R R R w R R R R R R Best PtTime 3012141 2811993 2512208 2411956 2312172 2212752 2112101 2012770 1912073 1913064 Engines R i W a know lot things use build models can very toxic very careful handling few things Im sure miss Methyl alcohol thing us use cleaning up engines wiping down plane ore painting cheap some us probably overuse long ago received letter Joe Sulli van Ja-Lea Co Dallas TX Joe brought attention following very interesting informa tion methyl alcohol will skip over de scription go toxicology Methyl alcohol possesses distinct narcotic prop erties also slight irritant mucous membranes Its main toxic effect exerted upon nervous system particularly optic nerves possibly retinae effect upon eyes has attributed optic neuritis sub sides followed atrophy optic nerve Once absorbed methyl alcohol very slowly eliminated Coma resulting massive exposures may last long two four days human body products formed its oxi dation formaldehyde formic acid both toxic Because slowness elimi nated methyl alcohol should regarded cu mulative poison Though single exposures fumes may cause no harmful effect daily expo sure may result accumulation sufficient methyl alcohol body cause illness Severe exposures may cause dizziness uncon sciousness sighing respiration cardiac depres sionand eventually death Stock too Im.dists Shipment zEIVDAH 0-42 37 cu In $24995 New Onedro 40 coi 13bering epine starter $15895 Reg Qoedre 40 *12216 Brieghelle flywheel 96 Reg Qoede 40 Power Aeeenbiy Only points $6895 QUADRA orZENOAH REPAIR $1000 pine panel Jim Meeser ERCOUPE PLANS $2395 FULL-KIT $23995 Jim Mono TOMAHAWK PLANS $2396 FULL-KIT $23995 Jim Meeser J3 KTTSN PLANS $2996 FIJLLKI1 $21995 510 KADET SENIOR KIT $4796 Ineve $20001 SIG KADET SENIORITA KIT $3495 note $15003 ZENOAN G-22 96 ZENOAN 0-38 $15995 FLOATS 48114 noel core $2195 complete kit $4796 10 WWl WHEELS 6 P1K Spring Stertor $2495 PLANS SUPER STEARMAN 114 lliodfreyl $2896 1I3TAYLORCRAFTor1/3CIJS Nelitn $2996 VOLKOPLANE 1/3 Chicken Cherliel $2395 Servo H4$2 42 no $1296 WoId 5-16 Irge models $4495 Poop elI noon ER TOP PUT OYNATHRUST 20% OFF U S Onedro FUEL TANKS16 32 $596 FIBERGLASSARROWSHAFTS 5/16 o32 long $for$11 95 24 Hoor Sow/so 9250 pontoon Senk Check ore o JIM MESSERS QUALITY MODEL PRODUCTS Valley Wow Dr Box 43 Allegany NY 14706 exposure less severe first symptoms may blurring vision photopho bia conjunctivitis followed develop ment definite eye lesions may head ache gastrointestinal disturbances dizziness feeling intoxication visual symp toms may clear temporarily recur later progress actual blindness Irritation mucous membranes throat respiratory tract peripheral neuritis occasionally symptoms referable other lesions ner vous system have reported skin may come dry cracked due solvent action methyl alcohol guess cant too careful think will pay little attention what chemicals use hobby lot new rules proposals up vote district Contest Board members Let people know feel Yes can fluence job support what AMA member wantnot just what feel Communicate Editors note Next month s Competition Newsletter should list rules proposals have survived Initial Vote Contest Boards last vote boards must make before rules proposals become accepted 1990/91 Final Vote votes deadline May 1 want influence district Contest Board member II have before RMcM next issue See races Skis/Hicks Continued page 56 smooth ski bottoms field runway surface synthetic mesh material paper mill dryer belt 11-lb sport ship skis lifts off surface though wheels couple flights seem have done no damage skis make up ski mold yourself pass around buddies Youll find couple evenings spent little project will very rewarding get up nerve touch-and-go local bayou things sure let know might come up whole new contest event About author Graham Hicks Build THORP T18 low-cost foam/wood materials Send $200 latest airplanes plans list Dozens available uts R/C FREE Foam Sources Foam Cutters Ni-Chrome Hard Shell Finishes Giant Foam Wings R/C Skydiver Etc FOAM SCALE MODELS Box 662MA-1 St Croix Falls WI 54024 164 Model Aviation CA MASK CA glue works wonders building models right Unfortunately gives ott enough fumes knock vulture off carcass modelers have suffered medical problems after inhaling CA fumes take chances special vapor respirator filters CA fumes soft face mask adjustable straps comfortably fits face sizes easy breathing valve allows prolonged use providing dependable filtering concentrations up 1000 PPM though rugged industrial mask light weight elimi nate fatigue Dont get gassed CA Get protected Order CA Mask today Just $1247 shipping cheaper hospital visit Money order Master Charge Visa include expiration date check allow 20 days clear Sorry no CODs Pelwan Enterprises 2540 RIDGE ROAD LANSING ILLINOIS 60438 Phone 895-8151 6B 1/5 AEBONCA L16B INe SPAN 2 OR 4 CYCLE60 80 TGfl FEATURED IN MAY 87 SCAlE R/C NOD 1/6 RYAN Ml MAJIPIAIE 72 IN SPAN 2 OR 4 CYClE e60 80 ENCfl FATHER OF THE SPISIT OF ST S 1/4 AERONCA L3 105 IN SPAN 2 OR 4 CYCLE90 15 EBGINFS UeSAeAFe W1II GRASSHOPPER 1/4 DRUISE TURDUIIT 65 IN SPAN 2 OR 4 CYCLE e60 80 tGflIE5 THE MT FAItOUS OF HOMEBUILTS ROLLED PLAN SE & MANUAL $2500 SHPING PREPA NY S TAX FISERGIASS COIlS NEEDED FOR AERONCA L16B & L3--FROM FISERGIASS MASTER AERO PLANS N PARTS PO BOX 939 N NY 14760 i2 UAL PLANS HISTORIC AINCRAFI QUAY BARBER MODELS 2710$ Botternot Rdse AU LOTS $12995Norih 0/meted 00044070 kit prices plus shipping 2161 7776172 credit card Welcome OHIO residents add 1% tax tiCs ooeNeCN"0 Iek u v S 5 1S. TOIE C&T SHOESTRING c1u60 902 aTROi io tas WEIGHT Ery/ouss/sO CONSTRUCTION llTIi DilAWflIGS & DATA FOR FORiRiLL 120 PYLON SPORT OR STANDOFF SCALE RADIO CONTROL SHORT KITS FOR THE SPORT MODELER BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LINE DESIGNED BY THE PROFESSIONAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WING AND TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND FUN TO FLY VISIT OUR OUTLET STORE AT IS MORGAN STREET IN CRYSTAL LAKE IL Phone 815/459-0417 THESE TWINS WERE DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT IS HARD TO BEAT THEY HAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE P-38 LIGHTNING 70 SPAN . 7495 FOR 25 TO 50 ENGINES A-26 INVADER 68 SPAN . 6495 8%iWG MEG MORE SINGLE ENGINE FIGHTERS FOR 25 TO 50 ENGINES AGM2 ZERO 54 SPAN3750 F-AD TOMAHAWK 55 SPAN3750 P-39 AIRACOBRA 55 SPAN3750 F-SlD MUSTANG 54 SPAN3750 C202 FOLGORE 56 SPAN3750 FOCKE WULF 90 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIREWALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD 5750 TO WING MFG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND 5350 FOR PRODUCTS CATALOG native Mississippian active modeling since late 1940s retired Navy officer lives 900 Main Ave La Grande OR 97850 recently published article Chip Net Safety Baffler August 1987 Model Aviation Support/Palko Continued page 59 member people neigh bors friends like support Tell something need want Tell something dont like Speak up always bear mind much have done try express criticisms sug gestions diplomatically can FF Nats/Murphy Continued page 63 fectly constructed logged six maxes top Bob Dunhams Motovator gale force such saw least two flights model went up slight left pattern rather desired righthand groove Catons well-adjusted Hbird seemed impervious distortions its power pattern airplane must un doubtedly regarded finest AMA class model contest Although AMA Gas classes av eraged between 35-40 entries per event Open D Gas drew respectable 17 contend ers pair Texans down Al amo way would carry home top hard ware baffle big uns Lee Camp bell quipped earlier hed like see Nit Wit win Pearl coming sec ond score could simply read Nit Pearl two outcome instead Pearl Pearl two Marvin Maces Pilfered Pearl bested teammate Jim Summersetts similar design mere sev en seconds Third-place winner Bill Dunlops carbon fiber Ex-Cels went OOS out of-sight fourth max Seelig de thermalizer timer failed function model spotted next day air 20 miles north across Wabash River Indiana average Gas flier AMA class events appeared relatively less scien tific Rubber power counterpart regard use exotic thermal detection devices fiberglass pole adorned lar tape served Gas fliers standard di vining rod seemed satisfied keeping eye some other fellows pole other guy always tal ler pole located better posi tion anyway contrast gumband gang came well equipped deci mal-reading Haverhill digital thermometerson-a-stick accompanied assorted ver sions bubble machine contraption rang ing totally commercial custom-made origin something mystery bubble machines could deliver observable thermal detection ground winds streaking along horizontal paths seldom higher 10 ft off turf case often good air above ground gusts boom ers prevalent weekend long Fred Blom captured coveted Wake field trophy Ed Konefes Martin Richardson close behind popular P-30 event saw Frank Heeb eking out onesecond win over relative newcomer Bill Jackson obviously learning fast get maximum energy out rubberband First third places four seconds apart event longtime rubberband expert Gawg Perryman log ging four-second deficit third place Completing first days event card A-i Towline 020 Cargo Bill Schlarb took A-i Towline going away max-out-plus model flown Cargo belonging Robert Nich ols bucked wind lifting respectable 45 oz Nichols Cox 020 must surely suf fering hernia problem after feat No report Free Flight session com plete unless preceded account weather case Saturdays weather however can brief Conditions second day competition ex act replica Fridays sunny windy Ed Kecks model designed Brad Bane well named Windwhip attacked wayward gusts admira ble consistency Keck turned six maxes Charles Caton pulled up 7 sec short 13 sec ahead veteran Sal Taibis Starduster 900 Sal lone Cali fornia entrant motored across US once again seemingly ageless 56 Chevy will have turned over 600000 miles its speedometer trek home 49th consecutive Natsdisre garding course World War II years Nats held Thats some attendance record Keith Fulmer took V3A second year row though thought saw him dork model process Nat Comforts Max Hog missed third max 3 sec puffing him second slot James Thoruberry pulled tugged A-2 Towline first place FlA saw Andrew Barron stumbling around corn stubble field couple times attempting circle tow model occurred time could have moved about 30 ft left onto grass strip lined run way less hazardous situationbut maybe thermals concentrated over corn stubble Oh well what know Anyway Andy chugged third place hind Tennessee dance man 0 C Stewart Coupe dHiver Lawrenceville resi dent Bud Brown led scant six seconds over omnipresent Gawg Perryman George once heard say powers Gas jobs A-in Pirelli Roger Wathen Indianapolis brought down vanload youngsters participate February 1989 165 I-fl FOR 40 TO 60 ENGINE
Edition: Model Aviation - 1989/02
Page Numbers: 52, 53, 54, 55, 56, 164, 165
THEYRE EASY AND FAST make theyll add very little weight airplane Since skis impart degree stability model wheels may find did reduce ground looping tendency takeoff landing plywood skis lighter metal ones have seen also use knee action positioning system closer full-scale torque rod system article describes procedures making ski Double parts making main gear set making nose gear length width measurements will have modified Suggested full-size templates parts included Construction Cut ski blank shown photo sheet A-in thick birch model aircraft plywood Lite Ply door covering making main gear ski 40- 60-size ship appropriate size would order 2 wide 12 long Round point nose liking round sides edges Straight sides sharp edges give ski its good tracking properties Make mold press piece 2 x 4 approximately 18 long Draw two parallel lines extending lengthwise 34 in from top bottom edges Trace 4-in radius arc lower horizontal line upper intersecting about Carefully cut along line band saw separate two pieces leaving slightly exaggerated profile ski see photo Temporarily insert few small A-in scrap plywood spacers along cut line represent thickness ski blank will inserted shaping Clamp two pieces back together drill %-in hole edge-to-edge about 1 forward tip radius arc front end Measuring front end radius arc curve drill another %-in hole exactly length ski blank rear bolt will go through Top Authors 66-in-span 11-lb Big Firecat trucks low approach flaps down skis set light touch down Above Left Shown wood parts skI Gussets 1/a-In-sq spruce balsa shown full-size parts layout Above Right Band saw cut line shown heavy black 18-in-iong 2 x 4 mold Rear bolt stops blank sliding rearward during clamping 52 Model Aviation Left After marking centerline pivot point axle marked about 40% forward trailing edge 12-in ski 5 rear works well Right wood parts assembled except keel Note gentle graceful curve upward skis dont have pug-nosed hole will act stop prevent blank slipping rearward clamp mold Insert 41h-in-long 5A6-indiameter carriage bolt washers end hole tighten nuts mold finished youre ready form ski Note 3A-in hole 546-in bolt intentionally sloppy fit reasons will clear later Bring pan water rapid boil kitchen stove thrust front four inches ski blank three minutes shown photo Have mold ready three minutes up immediately position ski mold rear ski just touches rear bolt Quickly tighten down both bolts ski blank forced curve mold see photo Remember ski will relax spring back bit take out mold bit overcurve excess tension necessary mold Allow dry several hours front fireplace overnight shop Make second ski exactly same way preferably same piece plywood making set trike gear ship shorten narrow dimensions nose gear ski Seven inches long inch-and-a-half wide works well 40- 60-size airplane Mold using method described above same mold can drill second hole rear stop bolt like Cut spine doubler parts again using A-in ply Dont sand anything yet ski will look better sand after parts glued together Mark centerlines top bottom three skis main skis put mark 5 rear will serve locator point axle shaft see photo find point Left fully assembled ski keel glued bottom keel position approximate should generally rear Right hole axle bushing being drilled through diamond-shaped doubler Use care get hole absolutely square February 1989 53 Left Make sure immerse least four inches birch plywood ski blank rapidly boiling water three minutes make pliable Right Clamp ski blank shaped mold let dry thoroughly Preferably should allow overnight photos Ed Barton Left Axle bushing being pressed spine Note use scrap plywood prevent jaw pliers damaging doubler Right Marking intersection landing gear wire %2-in anchor point see text alternate method Wire bends easily annealed first Left Wrap joint bright copper wire solder using hot heavy iron Silver solder 90% tin 4% silver sold hardware stores works well must use flux Right Final assembly showing cable spring attachments Seal paint skis before attaching cables nose gear ski lay flat surface such workbench kitchen counter view side ground level Mark point ski just begins curve up away surface axle point should exactly halfway between point rear edge ski Using slow-setting epoxy carefully glue spines /8-in-sq balsa spruce gussets onto three skis Soft spruce best hard balsa will work nearly well omit gussets add great deal strength handle side loads may necessary sand little curve bottom edge nose gear ski spine make match ski profile certain epoxy sets axle locations remain exactly above respective marks skis spines remain straight respect centerlines dry epoxy diamondshaped doublers spines shown Round front rear ends keels sandpaper epoxy along bottom centerlines skis see photos After determining diameter axle shafts use drill press drill hole 1/16 larger figure through exact center doublers ski Make sure hole square possible relation ski see photo Cut %-in-long piece brass tubing outside diameter same size drill gently tap press hole form bushing see photo Drill /16 hole end spine shown youre ready sand finish ski Sand enough remove fuzz splinters dont overdo Again round bottom edges skisas full-size skis sharper better track snow However neatly rounded edge spine doublers will make nicer looking ski Attaching skis type landing gear ship will determine what kind anchor points will need plane has wire gear legs follow paragraph has dural aluminum gear go paragraph B Whether landing gear legs airplane emerge wing fuselage step basically same Bend small hook about A-in diameter end piece %2-in music wire easiest way to anneal first heating cherry-red propane torch flame letting cool slowly Using wire bending gadgets available will also help Remove wheel gear leg Holding wire hook will call anchor point now about 2 above axle shaft using permanent marker mark both anchor point gear leg meet see photo Bend end anchor point parallel gear leg cut off about inch beyond bend Rough up file Dremel tool bind solder gear leg hook itself 2 above axle shown photo Ualess using 4-in-dia wheels spacing will allow reattach wheels airplane removing anchor points Repeat procedure exactly other gear leg B plane has dural gear youre luck easier two methods Cut two rounded teardrop54 Model Aviation 1-ULL SIZE PARTS TEMPLATES ALL PARTS OF 1/8-IN BIRCH PLYWOOD UNLESS OTHERWISE NOTED MAIN SKI PATTERN N LONG 00 MAIN SKI SPINE MAIN SKINOSE SKI DOUBLERDOUBLE R NOSE SKI SPINE MAIN SKI KEEL N PLYWOOD NOSE SKI KEEL IN PLYWOOD SECTION THROUGH CENTER OF SKI AT AXLE HOLE NOSE SKI PATTERN IL U V Left Alternate anchor point dural gear Pattern drawn 1A6-in aluminum Right Finished alternate anchor point note 2-in centers Left Here alternate anchor point place Slight outward bend places top hole directly over center spine Right Berklcy Steeion excellent material use cables An S-hook easiest way attach forward end spring spine shaped anchor points A6-thick aluminum shown templates see photo Drill A-in-dia hole small end large end drill hole exactly fit axle threads distance center center two holes should 1 / 2 exact length critical long two pieces identical see photo Remove axle shafts insert threaded ends through larger holes reassemble tightening securely anchor points should inside landing gear oriented straight up axle can bend small angle outward near top anchor points put A-in hole directly over ski center isnt necessary see photo Depending type nose gear ship has may have use little ingenuity installing anchor point spring cable look illustrations should give enough ideas work Most sport aircraft use straight nose gear leg short wire loop anchor point soldered two inches above axle will work fine Finish skis according favorite method keep light used Sherwin-Williams Zelon primer red automotive engine paint epoxy finish such K&B Hobby Poxy would probably better keep bottoms glass-smooth wax good automotive wax before first take out couple times year thereafter Mounting adjusting skis Install both main skis using wheel collars both sides necessary keep binding must swivel freely axles Sunbelters curved end goes front curving up Suspend ship its wing tips eyeball angle about 50 nose-up ski Loop piece steel cable Steelon brand nylon-covered fishing leader great anchor point above axle A6 hole rear end spine have angle set crimp using small lengths brass aluminum tubing shown photo sets angle-of-attack ski gentle finger pressure rear edge ski should raise its nose beyond angle Duplicate angle exactly other main ski have dural gear happen get aligmnent off hair can just loosen axle rotate anchor point bit final step youll need find couple identical wire springsapproxi mately 3A6-in dia couple inches long will local hardware store should have assortment junk box doesnt really impatient couple #64 rubberbands will work Err side making springs rubberbands too weak rather too strong make too strong could exert enough leverage nose over lightweight tail-dragger Install springs anchor point above axle front end spine After doing test knee-action skis pressing down front end finger should give easily spring quickly back original position released Make sure tight pulling down couple inches letting go anchor points loose cheated using smaller wire youll find out specified %2-in wire paragraph anything smaller will bend out shape under leverage would ordinarily no problem except two skis return fairly close identical nose-up position will find asymmetrical flight load skisa situation sufficient set heart popping like pacemaker microwave cook-off until get bird ground again tip arrive field set model car hood tailgate several minutes before put down snow set warm skis directly snow will melt little freeze chunks snow ice sticking bottoms Its easy tell youve done takes full power taxi out after snow has disappeared youll find can still fly skis until grass greens up Just sure stay grass similarly cushioned surface Asphalt other hard-surface runways eat up keels first 20 ft ugly things nice Continued page 164 56 Model Aviation everyone seemed have great time special thanks workers made such great race missed missed good always next year TOP 10 FINISHERS NMPRA 0500 Championship Race P1 Racer 1 AlIen 2 Bartle 3 Gates 4 Benezra 5 Eide 6 Johnson 7 Greer 8 Klien 9 Demay 10 Cranfill Plane V-Tail UT-Tail Scat Oat V-Tail 0500 0500 Q500 0500 Q500 Q500 Ricky Eng R R R w R R R R R R Best PtTime 3012141 2811993 2512208 2411956 2312172 2212752 2112101 2012770 1912073 1913064 Engines R i W a know lot things use build models can very toxic very careful handling few things Im sure miss Methyl alcohol thing us use cleaning up engines wiping down plane ore painting cheap some us probably overuse long ago received letter Joe Sulli van Ja-Lea Co Dallas TX Joe brought attention following very interesting informa tion methyl alcohol will skip over de scription go toxicology Methyl alcohol possesses distinct narcotic prop erties also slight irritant mucous membranes Its main toxic effect exerted upon nervous system particularly optic nerves possibly retinae effect upon eyes has attributed optic neuritis sub sides followed atrophy optic nerve Once absorbed methyl alcohol very slowly eliminated Coma resulting massive exposures may last long two four days human body products formed its oxi dation formaldehyde formic acid both toxic Because slowness elimi nated methyl alcohol should regarded cu mulative poison Though single exposures fumes may cause no harmful effect daily expo sure may result accumulation sufficient methyl alcohol body cause illness Severe exposures may cause dizziness uncon sciousness sighing respiration cardiac depres sionand eventually death Stock too Im.dists Shipment zEIVDAH 0-42 37 cu In $24995 New Onedro 40 coi 13bering epine starter $15895 Reg Qoedre 40 *12216 Brieghelle flywheel 96 Reg Qoede 40 Power Aeeenbiy Only points $6895 QUADRA orZENOAH REPAIR $1000 pine panel Jim Meeser ERCOUPE PLANS $2395 FULL-KIT $23995 Jim Mono TOMAHAWK PLANS $2396 FULL-KIT $23995 Jim Meeser J3 KTTSN PLANS $2996 FIJLLKI1 $21995 510 KADET SENIOR KIT $4796 Ineve $20001 SIG KADET SENIORITA KIT $3495 note $15003 ZENOAN G-22 96 ZENOAN 0-38 $15995 FLOATS 48114 noel core $2195 complete kit $4796 10 WWl WHEELS 6 P1K Spring Stertor $2495 PLANS SUPER STEARMAN 114 lliodfreyl $2896 1I3TAYLORCRAFTor1/3CIJS Nelitn $2996 VOLKOPLANE 1/3 Chicken Cherliel $2395 Servo H4$2 42 no $1296 WoId 5-16 Irge models $4495 Poop elI noon ER TOP PUT OYNATHRUST 20% OFF U S Onedro FUEL TANKS16 32 $596 FIBERGLASSARROWSHAFTS 5/16 o32 long $for$11 95 24 Hoor Sow/so 9250 pontoon Senk Check ore o JIM MESSERS QUALITY MODEL PRODUCTS Valley Wow Dr Box 43 Allegany NY 14706 exposure less severe first symptoms may blurring vision photopho bia conjunctivitis followed develop ment definite eye lesions may head ache gastrointestinal disturbances dizziness feeling intoxication visual symp toms may clear temporarily recur later progress actual blindness Irritation mucous membranes throat respiratory tract peripheral neuritis occasionally symptoms referable other lesions ner vous system have reported skin may come dry cracked due solvent action methyl alcohol guess cant too careful think will pay little attention what chemicals use hobby lot new rules proposals up vote district Contest Board members Let people know feel Yes can fluence job support what AMA member wantnot just what feel Communicate Editors note Next month s Competition Newsletter should list rules proposals have survived Initial Vote Contest Boards last vote boards must make before rules proposals become accepted 1990/91 Final Vote votes deadline May 1 want influence district Contest Board member II have before RMcM next issue See races Skis/Hicks Continued page 56 smooth ski bottoms field runway surface synthetic mesh material paper mill dryer belt 11-lb sport ship skis lifts off surface though wheels couple flights seem have done no damage skis make up ski mold yourself pass around buddies Youll find couple evenings spent little project will very rewarding get up nerve touch-and-go local bayou things sure let know might come up whole new contest event About author Graham Hicks Build THORP T18 low-cost foam/wood materials Send $200 latest airplanes plans list Dozens available uts R/C FREE Foam Sources Foam Cutters Ni-Chrome Hard Shell Finishes Giant Foam Wings R/C Skydiver Etc FOAM SCALE MODELS Box 662MA-1 St Croix Falls WI 54024 164 Model Aviation CA MASK CA glue works wonders building models right Unfortunately gives ott enough fumes knock vulture off carcass modelers have suffered medical problems after inhaling CA fumes take chances special vapor respirator filters CA fumes soft face mask adjustable straps comfortably fits face sizes easy breathing valve allows prolonged use providing dependable filtering concentrations up 1000 PPM though rugged industrial mask light weight elimi nate fatigue Dont get gassed CA Get protected Order CA Mask today Just $1247 shipping cheaper hospital visit Money order Master Charge Visa include expiration date check allow 20 days clear Sorry no CODs Pelwan Enterprises 2540 RIDGE ROAD LANSING ILLINOIS 60438 Phone 895-8151 6B 1/5 AEBONCA L16B INe SPAN 2 OR 4 CYCLE60 80 TGfl FEATURED IN MAY 87 SCAlE R/C NOD 1/6 RYAN Ml MAJIPIAIE 72 IN SPAN 2 OR 4 CYClE e60 80 ENCfl FATHER OF THE SPISIT OF ST S 1/4 AERONCA L3 105 IN SPAN 2 OR 4 CYCLE90 15 EBGINFS UeSAeAFe W1II GRASSHOPPER 1/4 DRUISE TURDUIIT 65 IN SPAN 2 OR 4 CYCLE e60 80 tGflIE5 THE MT FAItOUS OF HOMEBUILTS ROLLED PLAN SE & MANUAL $2500 SHPING PREPA NY S TAX FISERGIASS COIlS NEEDED FOR AERONCA L16B & L3--FROM FISERGIASS MASTER AERO PLANS N PARTS PO BOX 939 N NY 14760 i2 UAL PLANS HISTORIC AINCRAFI QUAY BARBER MODELS 2710$ Botternot Rdse AU LOTS $12995Norih 0/meted 00044070 kit prices plus shipping 2161 7776172 credit card Welcome OHIO residents add 1% tax tiCs ooeNeCN"0 Iek u v S 5 1S. TOIE C&T SHOESTRING c1u60 902 aTROi io tas WEIGHT Ery/ouss/sO CONSTRUCTION llTIi DilAWflIGS & DATA FOR FORiRiLL 120 PYLON SPORT OR STANDOFF SCALE RADIO CONTROL SHORT KITS FOR THE SPORT MODELER BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LINE DESIGNED BY THE PROFESSIONAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WING AND TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND FUN TO FLY VISIT OUR OUTLET STORE AT IS MORGAN STREET IN CRYSTAL LAKE IL Phone 815/459-0417 THESE TWINS WERE DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT IS HARD TO BEAT THEY HAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE P-38 LIGHTNING 70 SPAN . 7495 FOR 25 TO 50 ENGINES A-26 INVADER 68 SPAN . 6495 8%iWG MEG MORE SINGLE ENGINE FIGHTERS FOR 25 TO 50 ENGINES AGM2 ZERO 54 SPAN3750 F-AD TOMAHAWK 55 SPAN3750 P-39 AIRACOBRA 55 SPAN3750 F-SlD MUSTANG 54 SPAN3750 C202 FOLGORE 56 SPAN3750 FOCKE WULF 90 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIREWALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD 5750 TO WING MFG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND 5350 FOR PRODUCTS CATALOG native Mississippian active modeling since late 1940s retired Navy officer lives 900 Main Ave La Grande OR 97850 recently published article Chip Net Safety Baffler August 1987 Model Aviation Support/Palko Continued page 59 member people neigh bors friends like support Tell something need want Tell something dont like Speak up always bear mind much have done try express criticisms sug gestions diplomatically can FF Nats/Murphy Continued page 63 fectly constructed logged six maxes top Bob Dunhams Motovator gale force such saw least two flights model went up slight left pattern rather desired righthand groove Catons well-adjusted Hbird seemed impervious distortions its power pattern airplane must un doubtedly regarded finest AMA class model contest Although AMA Gas classes av eraged between 35-40 entries per event Open D Gas drew respectable 17 contend ers pair Texans down Al amo way would carry home top hard ware baffle big uns Lee Camp bell quipped earlier hed like see Nit Wit win Pearl coming sec ond score could simply read Nit Pearl two outcome instead Pearl Pearl two Marvin Maces Pilfered Pearl bested teammate Jim Summersetts similar design mere sev en seconds Third-place winner Bill Dunlops carbon fiber Ex-Cels went OOS out of-sight fourth max Seelig de thermalizer timer failed function model spotted next day air 20 miles north across Wabash River Indiana average Gas flier AMA class events appeared relatively less scien tific Rubber power counterpart regard use exotic thermal detection devices fiberglass pole adorned lar tape served Gas fliers standard di vining rod seemed satisfied keeping eye some other fellows pole other guy always tal ler pole located better posi tion anyway contrast gumband gang came well equipped deci mal-reading Haverhill digital thermometerson-a-stick accompanied assorted ver sions bubble machine contraption rang ing totally commercial custom-made origin something mystery bubble machines could deliver observable thermal detection ground winds streaking along horizontal paths seldom higher 10 ft off turf case often good air above ground gusts boom ers prevalent weekend long Fred Blom captured coveted Wake field trophy Ed Konefes Martin Richardson close behind popular P-30 event saw Frank Heeb eking out onesecond win over relative newcomer Bill Jackson obviously learning fast get maximum energy out rubberband First third places four seconds apart event longtime rubberband expert Gawg Perryman log ging four-second deficit third place Completing first days event card A-i Towline 020 Cargo Bill Schlarb took A-i Towline going away max-out-plus model flown Cargo belonging Robert Nich ols bucked wind lifting respectable 45 oz Nichols Cox 020 must surely suf fering hernia problem after feat No report Free Flight session com plete unless preceded account weather case Saturdays weather however can brief Conditions second day competition ex act replica Fridays sunny windy Ed Kecks model designed Brad Bane well named Windwhip attacked wayward gusts admira ble consistency Keck turned six maxes Charles Caton pulled up 7 sec short 13 sec ahead veteran Sal Taibis Starduster 900 Sal lone Cali fornia entrant motored across US once again seemingly ageless 56 Chevy will have turned over 600000 miles its speedometer trek home 49th consecutive Natsdisre garding course World War II years Nats held Thats some attendance record Keith Fulmer took V3A second year row though thought saw him dork model process Nat Comforts Max Hog missed third max 3 sec puffing him second slot James Thoruberry pulled tugged A-2 Towline first place FlA saw Andrew Barron stumbling around corn stubble field couple times attempting circle tow model occurred time could have moved about 30 ft left onto grass strip lined run way less hazardous situationbut maybe thermals concentrated over corn stubble Oh well what know Anyway Andy chugged third place hind Tennessee dance man 0 C Stewart Coupe dHiver Lawrenceville resi dent Bud Brown led scant six seconds over omnipresent Gawg Perryman George once heard say powers Gas jobs A-in Pirelli Roger Wathen Indianapolis brought down vanload youngsters participate February 1989 165 I-fl FOR 40 TO 60 ENGINE
Edition: Model Aviation - 1989/02
Page Numbers: 52, 53, 54, 55, 56, 164, 165
THEYRE EASY AND FAST make theyll add very little weight airplane Since skis impart degree stability model wheels may find did reduce ground looping tendency takeoff landing plywood skis lighter metal ones have seen also use knee action positioning system closer full-scale torque rod system article describes procedures making ski Double parts making main gear set making nose gear length width measurements will have modified Suggested full-size templates parts included Construction Cut ski blank shown photo sheet A-in thick birch model aircraft plywood Lite Ply door covering making main gear ski 40- 60-size ship appropriate size would order 2 wide 12 long Round point nose liking round sides edges Straight sides sharp edges give ski its good tracking properties Make mold press piece 2 x 4 approximately 18 long Draw two parallel lines extending lengthwise 34 in from top bottom edges Trace 4-in radius arc lower horizontal line upper intersecting about Carefully cut along line band saw separate two pieces leaving slightly exaggerated profile ski see photo Temporarily insert few small A-in scrap plywood spacers along cut line represent thickness ski blank will inserted shaping Clamp two pieces back together drill %-in hole edge-to-edge about 1 forward tip radius arc front end Measuring front end radius arc curve drill another %-in hole exactly length ski blank rear bolt will go through Top Authors 66-in-span 11-lb Big Firecat trucks low approach flaps down skis set light touch down Above Left Shown wood parts skI Gussets 1/a-In-sq spruce balsa shown full-size parts layout Above Right Band saw cut line shown heavy black 18-in-iong 2 x 4 mold Rear bolt stops blank sliding rearward during clamping 52 Model Aviation Left After marking centerline pivot point axle marked about 40% forward trailing edge 12-in ski 5 rear works well Right wood parts assembled except keel Note gentle graceful curve upward skis dont have pug-nosed hole will act stop prevent blank slipping rearward clamp mold Insert 41h-in-long 5A6-indiameter carriage bolt washers end hole tighten nuts mold finished youre ready form ski Note 3A-in hole 546-in bolt intentionally sloppy fit reasons will clear later Bring pan water rapid boil kitchen stove thrust front four inches ski blank three minutes shown photo Have mold ready three minutes up immediately position ski mold rear ski just touches rear bolt Quickly tighten down both bolts ski blank forced curve mold see photo Remember ski will relax spring back bit take out mold bit overcurve excess tension necessary mold Allow dry several hours front fireplace overnight shop Make second ski exactly same way preferably same piece plywood making set trike gear ship shorten narrow dimensions nose gear ski Seven inches long inch-and-a-half wide works well 40- 60-size airplane Mold using method described above same mold can drill second hole rear stop bolt like Cut spine doubler parts again using A-in ply Dont sand anything yet ski will look better sand after parts glued together Mark centerlines top bottom three skis main skis put mark 5 rear will serve locator point axle shaft see photo find point Left fully assembled ski keel glued bottom keel position approximate should generally rear Right hole axle bushing being drilled through diamond-shaped doubler Use care get hole absolutely square February 1989 53 Left Make sure immerse least four inches birch plywood ski blank rapidly boiling water three minutes make pliable Right Clamp ski blank shaped mold let dry thoroughly Preferably should allow overnight photos Ed Barton Left Axle bushing being pressed spine Note use scrap plywood prevent jaw pliers damaging doubler Right Marking intersection landing gear wire %2-in anchor point see text alternate method Wire bends easily annealed first Left Wrap joint bright copper wire solder using hot heavy iron Silver solder 90% tin 4% silver sold hardware stores works well must use flux Right Final assembly showing cable spring attachments Seal paint skis before attaching cables nose gear ski lay flat surface such workbench kitchen counter view side ground level Mark point ski just begins curve up away surface axle point should exactly halfway between point rear edge ski Using slow-setting epoxy carefully glue spines /8-in-sq balsa spruce gussets onto three skis Soft spruce best hard balsa will work nearly well omit gussets add great deal strength handle side loads may necessary sand little curve bottom edge nose gear ski spine make match ski profile certain epoxy sets axle locations remain exactly above respective marks skis spines remain straight respect centerlines dry epoxy diamondshaped doublers spines shown Round front rear ends keels sandpaper epoxy along bottom centerlines skis see photos After determining diameter axle shafts use drill press drill hole 1/16 larger figure through exact center doublers ski Make sure hole square possible relation ski see photo Cut %-in-long piece brass tubing outside diameter same size drill gently tap press hole form bushing see photo Drill /16 hole end spine shown youre ready sand finish ski Sand enough remove fuzz splinters dont overdo Again round bottom edges skisas full-size skis sharper better track snow However neatly rounded edge spine doublers will make nicer looking ski Attaching skis type landing gear ship will determine what kind anchor points will need plane has wire gear legs follow paragraph has dural aluminum gear go paragraph B Whether landing gear legs airplane emerge wing fuselage step basically same Bend small hook about A-in diameter end piece %2-in music wire easiest way to anneal first heating cherry-red propane torch flame letting cool slowly Using wire bending gadgets available will also help Remove wheel gear leg Holding wire hook will call anchor point now about 2 above axle shaft using permanent marker mark both anchor point gear leg meet see photo Bend end anchor point parallel gear leg cut off about inch beyond bend Rough up file Dremel tool bind solder gear leg hook itself 2 above axle shown photo Ualess using 4-in-dia wheels spacing will allow reattach wheels airplane removing anchor points Repeat procedure exactly other gear leg B plane has dural gear youre luck easier two methods Cut two rounded teardrop54 Model Aviation 1-ULL SIZE PARTS TEMPLATES ALL PARTS OF 1/8-IN BIRCH PLYWOOD UNLESS OTHERWISE NOTED MAIN SKI PATTERN N LONG 00 MAIN SKI SPINE MAIN SKINOSE SKI DOUBLERDOUBLE R NOSE SKI SPINE MAIN SKI KEEL N PLYWOOD NOSE SKI KEEL IN PLYWOOD SECTION THROUGH CENTER OF SKI AT AXLE HOLE NOSE SKI PATTERN IL U V Left Alternate anchor point dural gear Pattern drawn 1A6-in aluminum Right Finished alternate anchor point note 2-in centers Left Here alternate anchor point place Slight outward bend places top hole directly over center spine Right Berklcy Steeion excellent material use cables An S-hook easiest way attach forward end spring spine shaped anchor points A6-thick aluminum shown templates see photo Drill A-in-dia hole small end large end drill hole exactly fit axle threads distance center center two holes should 1 / 2 exact length critical long two pieces identical see photo Remove axle shafts insert threaded ends through larger holes reassemble tightening securely anchor points should inside landing gear oriented straight up axle can bend small angle outward near top anchor points put A-in hole directly over ski center isnt necessary see photo Depending type nose gear ship has may have use little ingenuity installing anchor point spring cable look illustrations should give enough ideas work Most sport aircraft use straight nose gear leg short wire loop anchor point soldered two inches above axle will work fine Finish skis according favorite method keep light used Sherwin-Williams Zelon primer red automotive engine paint epoxy finish such K&B Hobby Poxy would probably better keep bottoms glass-smooth wax good automotive wax before first take out couple times year thereafter Mounting adjusting skis Install both main skis using wheel collars both sides necessary keep binding must swivel freely axles Sunbelters curved end goes front curving up Suspend ship its wing tips eyeball angle about 50 nose-up ski Loop piece steel cable Steelon brand nylon-covered fishing leader great anchor point above axle A6 hole rear end spine have angle set crimp using small lengths brass aluminum tubing shown photo sets angle-of-attack ski gentle finger pressure rear edge ski should raise its nose beyond angle Duplicate angle exactly other main ski have dural gear happen get aligmnent off hair can just loosen axle rotate anchor point bit final step youll need find couple identical wire springsapproxi mately 3A6-in dia couple inches long will local hardware store should have assortment junk box doesnt really impatient couple #64 rubberbands will work Err side making springs rubberbands too weak rather too strong make too strong could exert enough leverage nose over lightweight tail-dragger Install springs anchor point above axle front end spine After doing test knee-action skis pressing down front end finger should give easily spring quickly back original position released Make sure tight pulling down couple inches letting go anchor points loose cheated using smaller wire youll find out specified %2-in wire paragraph anything smaller will bend out shape under leverage would ordinarily no problem except two skis return fairly close identical nose-up position will find asymmetrical flight load skisa situation sufficient set heart popping like pacemaker microwave cook-off until get bird ground again tip arrive field set model car hood tailgate several minutes before put down snow set warm skis directly snow will melt little freeze chunks snow ice sticking bottoms Its easy tell youve done takes full power taxi out after snow has disappeared youll find can still fly skis until grass greens up Just sure stay grass similarly cushioned surface Asphalt other hard-surface runways eat up keels first 20 ft ugly things nice Continued page 164 56 Model Aviation everyone seemed have great time special thanks workers made such great race missed missed good always next year TOP 10 FINISHERS NMPRA 0500 Championship Race P1 Racer 1 AlIen 2 Bartle 3 Gates 4 Benezra 5 Eide 6 Johnson 7 Greer 8 Klien 9 Demay 10 Cranfill Plane V-Tail UT-Tail Scat Oat V-Tail 0500 0500 Q500 0500 Q500 Q500 Ricky Eng R R R w R R R R R R Best PtTime 3012141 2811993 2512208 2411956 2312172 2212752 2112101 2012770 1912073 1913064 Engines R i W a know lot things use build models can very toxic very careful handling few things Im sure miss Methyl alcohol thing us use cleaning up engines wiping down plane ore painting cheap some us probably overuse long ago received letter Joe Sulli van Ja-Lea Co Dallas TX Joe brought attention following very interesting informa tion methyl alcohol will skip over de scription go toxicology Methyl alcohol possesses distinct narcotic prop erties also slight irritant mucous membranes Its main toxic effect exerted upon nervous system particularly optic nerves possibly retinae effect upon eyes has attributed optic neuritis sub sides followed atrophy optic nerve Once absorbed methyl alcohol very slowly eliminated Coma resulting massive exposures may last long two four days human body products formed its oxi dation formaldehyde formic acid both toxic Because slowness elimi nated methyl alcohol should regarded cu mulative poison Though single exposures fumes may cause no harmful effect daily expo sure may result accumulation sufficient methyl alcohol body cause illness Severe exposures may cause dizziness uncon sciousness sighing respiration cardiac depres sionand eventually death Stock too Im.dists Shipment zEIVDAH 0-42 37 cu In $24995 New Onedro 40 coi 13bering epine starter $15895 Reg Qoedre 40 *12216 Brieghelle flywheel 96 Reg Qoede 40 Power Aeeenbiy Only points $6895 QUADRA orZENOAH REPAIR $1000 pine panel Jim Meeser ERCOUPE PLANS $2395 FULL-KIT $23995 Jim Mono TOMAHAWK PLANS $2396 FULL-KIT $23995 Jim Meeser J3 KTTSN PLANS $2996 FIJLLKI1 $21995 510 KADET SENIOR KIT $4796 Ineve $20001 SIG KADET SENIORITA KIT $3495 note $15003 ZENOAN G-22 96 ZENOAN 0-38 $15995 FLOATS 48114 noel core $2195 complete kit $4796 10 WWl WHEELS 6 P1K Spring Stertor $2495 PLANS SUPER STEARMAN 114 lliodfreyl $2896 1I3TAYLORCRAFTor1/3CIJS Nelitn $2996 VOLKOPLANE 1/3 Chicken Cherliel $2395 Servo H4$2 42 no $1296 WoId 5-16 Irge models $4495 Poop elI noon ER TOP PUT OYNATHRUST 20% OFF U S Onedro FUEL TANKS16 32 $596 FIBERGLASSARROWSHAFTS 5/16 o32 long $for$11 95 24 Hoor Sow/so 9250 pontoon Senk Check ore o JIM MESSERS QUALITY MODEL PRODUCTS Valley Wow Dr Box 43 Allegany NY 14706 exposure less severe first symptoms may blurring vision photopho bia conjunctivitis followed develop ment definite eye lesions may head ache gastrointestinal disturbances dizziness feeling intoxication visual symp toms may clear temporarily recur later progress actual blindness Irritation mucous membranes throat respiratory tract peripheral neuritis occasionally symptoms referable other lesions ner vous system have reported skin may come dry cracked due solvent action methyl alcohol guess cant too careful think will pay little attention what chemicals use hobby lot new rules proposals up vote district Contest Board members Let people know feel Yes can fluence job support what AMA member wantnot just what feel Communicate Editors note Next month s Competition Newsletter should list rules proposals have survived Initial Vote Contest Boards last vote boards must make before rules proposals become accepted 1990/91 Final Vote votes deadline May 1 want influence district Contest Board member II have before RMcM next issue See races Skis/Hicks Continued page 56 smooth ski bottoms field runway surface synthetic mesh material paper mill dryer belt 11-lb sport ship skis lifts off surface though wheels couple flights seem have done no damage skis make up ski mold yourself pass around buddies Youll find couple evenings spent little project will very rewarding get up nerve touch-and-go local bayou things sure let know might come up whole new contest event About author Graham Hicks Build THORP T18 low-cost foam/wood materials Send $200 latest airplanes plans list Dozens available uts R/C FREE Foam Sources Foam Cutters Ni-Chrome Hard Shell Finishes Giant Foam Wings R/C Skydiver Etc FOAM SCALE MODELS Box 662MA-1 St Croix Falls WI 54024 164 Model Aviation CA MASK CA glue works wonders building models right Unfortunately gives ott enough fumes knock vulture off carcass modelers have suffered medical problems after inhaling CA fumes take chances special vapor respirator filters CA fumes soft face mask adjustable straps comfortably fits face sizes easy breathing valve allows prolonged use providing dependable filtering concentrations up 1000 PPM though rugged industrial mask light weight elimi nate fatigue Dont get gassed CA Get protected Order CA Mask today Just $1247 shipping cheaper hospital visit Money order Master Charge Visa include expiration date check allow 20 days clear Sorry no CODs Pelwan Enterprises 2540 RIDGE ROAD LANSING ILLINOIS 60438 Phone 895-8151 6B 1/5 AEBONCA L16B INe SPAN 2 OR 4 CYCLE60 80 TGfl FEATURED IN MAY 87 SCAlE R/C NOD 1/6 RYAN Ml MAJIPIAIE 72 IN SPAN 2 OR 4 CYClE e60 80 ENCfl FATHER OF THE SPISIT OF ST S 1/4 AERONCA L3 105 IN SPAN 2 OR 4 CYCLE90 15 EBGINFS UeSAeAFe W1II GRASSHOPPER 1/4 DRUISE TURDUIIT 65 IN SPAN 2 OR 4 CYCLE e60 80 tGflIE5 THE MT FAItOUS OF HOMEBUILTS ROLLED PLAN SE & MANUAL $2500 SHPING PREPA NY S TAX FISERGIASS COIlS NEEDED FOR AERONCA L16B & L3--FROM FISERGIASS MASTER AERO PLANS N PARTS PO BOX 939 N NY 14760 i2 UAL PLANS HISTORIC AINCRAFI QUAY BARBER MODELS 2710$ Botternot Rdse AU LOTS $12995Norih 0/meted 00044070 kit prices plus shipping 2161 7776172 credit card Welcome OHIO residents add 1% tax tiCs ooeNeCN"0 Iek u v S 5 1S. TOIE C&T SHOESTRING c1u60 902 aTROi io tas WEIGHT Ery/ouss/sO CONSTRUCTION llTIi DilAWflIGS & DATA FOR FORiRiLL 120 PYLON SPORT OR STANDOFF SCALE RADIO CONTROL SHORT KITS FOR THE SPORT MODELER BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LINE DESIGNED BY THE PROFESSIONAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WING AND TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND FUN TO FLY VISIT OUR OUTLET STORE AT IS MORGAN STREET IN CRYSTAL LAKE IL Phone 815/459-0417 THESE TWINS WERE DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT IS HARD TO BEAT THEY HAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE P-38 LIGHTNING 70 SPAN . 7495 FOR 25 TO 50 ENGINES A-26 INVADER 68 SPAN . 6495 8%iWG MEG MORE SINGLE ENGINE FIGHTERS FOR 25 TO 50 ENGINES AGM2 ZERO 54 SPAN3750 F-AD TOMAHAWK 55 SPAN3750 P-39 AIRACOBRA 55 SPAN3750 F-SlD MUSTANG 54 SPAN3750 C202 FOLGORE 56 SPAN3750 FOCKE WULF 90 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIREWALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD 5750 TO WING MFG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND 5350 FOR PRODUCTS CATALOG native Mississippian active modeling since late 1940s retired Navy officer lives 900 Main Ave La Grande OR 97850 recently published article Chip Net Safety Baffler August 1987 Model Aviation Support/Palko Continued page 59 member people neigh bors friends like support Tell something need want Tell something dont like Speak up always bear mind much have done try express criticisms sug gestions diplomatically can FF Nats/Murphy Continued page 63 fectly constructed logged six maxes top Bob Dunhams Motovator gale force such saw least two flights model went up slight left pattern rather desired righthand groove Catons well-adjusted Hbird seemed impervious distortions its power pattern airplane must un doubtedly regarded finest AMA class model contest Although AMA Gas classes av eraged between 35-40 entries per event Open D Gas drew respectable 17 contend ers pair Texans down Al amo way would carry home top hard ware baffle big uns Lee Camp bell quipped earlier hed like see Nit Wit win Pearl coming sec ond score could simply read Nit Pearl two outcome instead Pearl Pearl two Marvin Maces Pilfered Pearl bested teammate Jim Summersetts similar design mere sev en seconds Third-place winner Bill Dunlops carbon fiber Ex-Cels went OOS out of-sight fourth max Seelig de thermalizer timer failed function model spotted next day air 20 miles north across Wabash River Indiana average Gas flier AMA class events appeared relatively less scien tific Rubber power counterpart regard use exotic thermal detection devices fiberglass pole adorned lar tape served Gas fliers standard di vining rod seemed satisfied keeping eye some other fellows pole other guy always tal ler pole located better posi tion anyway contrast gumband gang came well equipped deci mal-reading Haverhill digital thermometerson-a-stick accompanied assorted ver sions bubble machine contraption rang ing totally commercial custom-made origin something mystery bubble machines could deliver observable thermal detection ground winds streaking along horizontal paths seldom higher 10 ft off turf case often good air above ground gusts boom ers prevalent weekend long Fred Blom captured coveted Wake field trophy Ed Konefes Martin Richardson close behind popular P-30 event saw Frank Heeb eking out onesecond win over relative newcomer Bill Jackson obviously learning fast get maximum energy out rubberband First third places four seconds apart event longtime rubberband expert Gawg Perryman log ging four-second deficit third place Completing first days event card A-i Towline 020 Cargo Bill Schlarb took A-i Towline going away max-out-plus model flown Cargo belonging Robert Nich ols bucked wind lifting respectable 45 oz Nichols Cox 020 must surely suf fering hernia problem after feat No report Free Flight session com plete unless preceded account weather case Saturdays weather however can brief Conditions second day competition ex act replica Fridays sunny windy Ed Kecks model designed Brad Bane well named Windwhip attacked wayward gusts admira ble consistency Keck turned six maxes Charles Caton pulled up 7 sec short 13 sec ahead veteran Sal Taibis Starduster 900 Sal lone Cali fornia entrant motored across US once again seemingly ageless 56 Chevy will have turned over 600000 miles its speedometer trek home 49th consecutive Natsdisre garding course World War II years Nats held Thats some attendance record Keith Fulmer took V3A second year row though thought saw him dork model process Nat Comforts Max Hog missed third max 3 sec puffing him second slot James Thoruberry pulled tugged A-2 Towline first place FlA saw Andrew Barron stumbling around corn stubble field couple times attempting circle tow model occurred time could have moved about 30 ft left onto grass strip lined run way less hazardous situationbut maybe thermals concentrated over corn stubble Oh well what know Anyway Andy chugged third place hind Tennessee dance man 0 C Stewart Coupe dHiver Lawrenceville resi dent Bud Brown led scant six seconds over omnipresent Gawg Perryman George once heard say powers Gas jobs A-in Pirelli Roger Wathen Indianapolis brought down vanload youngsters participate February 1989 165 I-fl FOR 40 TO 60 ENGINE
Edition: Model Aviation - 1989/02
Page Numbers: 52, 53, 54, 55, 56, 164, 165
THEYRE EASY AND FAST make theyll add very little weight airplane Since skis impart degree stability model wheels may find did reduce ground looping tendency takeoff landing plywood skis lighter metal ones have seen also use knee action positioning system closer full-scale torque rod system article describes procedures making ski Double parts making main gear set making nose gear length width measurements will have modified Suggested full-size templates parts included Construction Cut ski blank shown photo sheet A-in thick birch model aircraft plywood Lite Ply door covering making main gear ski 40- 60-size ship appropriate size would order 2 wide 12 long Round point nose liking round sides edges Straight sides sharp edges give ski its good tracking properties Make mold press piece 2 x 4 approximately 18 long Draw two parallel lines extending lengthwise 34 in from top bottom edges Trace 4-in radius arc lower horizontal line upper intersecting about Carefully cut along line band saw separate two pieces leaving slightly exaggerated profile ski see photo Temporarily insert few small A-in scrap plywood spacers along cut line represent thickness ski blank will inserted shaping Clamp two pieces back together drill %-in hole edge-to-edge about 1 forward tip radius arc front end Measuring front end radius arc curve drill another %-in hole exactly length ski blank rear bolt will go through Top Authors 66-in-span 11-lb Big Firecat trucks low approach flaps down skis set light touch down Above Left Shown wood parts skI Gussets 1/a-In-sq spruce balsa shown full-size parts layout Above Right Band saw cut line shown heavy black 18-in-iong 2 x 4 mold Rear bolt stops blank sliding rearward during clamping 52 Model Aviation Left After marking centerline pivot point axle marked about 40% forward trailing edge 12-in ski 5 rear works well Right wood parts assembled except keel Note gentle graceful curve upward skis dont have pug-nosed hole will act stop prevent blank slipping rearward clamp mold Insert 41h-in-long 5A6-indiameter carriage bolt washers end hole tighten nuts mold finished youre ready form ski Note 3A-in hole 546-in bolt intentionally sloppy fit reasons will clear later Bring pan water rapid boil kitchen stove thrust front four inches ski blank three minutes shown photo Have mold ready three minutes up immediately position ski mold rear ski just touches rear bolt Quickly tighten down both bolts ski blank forced curve mold see photo Remember ski will relax spring back bit take out mold bit overcurve excess tension necessary mold Allow dry several hours front fireplace overnight shop Make second ski exactly same way preferably same piece plywood making set trike gear ship shorten narrow dimensions nose gear ski Seven inches long inch-and-a-half wide works well 40- 60-size airplane Mold using method described above same mold can drill second hole rear stop bolt like Cut spine doubler parts again using A-in ply Dont sand anything yet ski will look better sand after parts glued together Mark centerlines top bottom three skis main skis put mark 5 rear will serve locator point axle shaft see photo find point Left fully assembled ski keel glued bottom keel position approximate should generally rear Right hole axle bushing being drilled through diamond-shaped doubler Use care get hole absolutely square February 1989 53 Left Make sure immerse least four inches birch plywood ski blank rapidly boiling water three minutes make pliable Right Clamp ski blank shaped mold let dry thoroughly Preferably should allow overnight photos Ed Barton Left Axle bushing being pressed spine Note use scrap plywood prevent jaw pliers damaging doubler Right Marking intersection landing gear wire %2-in anchor point see text alternate method Wire bends easily annealed first Left Wrap joint bright copper wire solder using hot heavy iron Silver solder 90% tin 4% silver sold hardware stores works well must use flux Right Final assembly showing cable spring attachments Seal paint skis before attaching cables nose gear ski lay flat surface such workbench kitchen counter view side ground level Mark point ski just begins curve up away surface axle point should exactly halfway between point rear edge ski Using slow-setting epoxy carefully glue spines /8-in-sq balsa spruce gussets onto three skis Soft spruce best hard balsa will work nearly well omit gussets add great deal strength handle side loads may necessary sand little curve bottom edge nose gear ski spine make match ski profile certain epoxy sets axle locations remain exactly above respective marks skis spines remain straight respect centerlines dry epoxy diamondshaped doublers spines shown Round front rear ends keels sandpaper epoxy along bottom centerlines skis see photos After determining diameter axle shafts use drill press drill hole 1/16 larger figure through exact center doublers ski Make sure hole square possible relation ski see photo Cut %-in-long piece brass tubing outside diameter same size drill gently tap press hole form bushing see photo Drill /16 hole end spine shown youre ready sand finish ski Sand enough remove fuzz splinters dont overdo Again round bottom edges skisas full-size skis sharper better track snow However neatly rounded edge spine doublers will make nicer looking ski Attaching skis type landing gear ship will determine what kind anchor points will need plane has wire gear legs follow paragraph has dural aluminum gear go paragraph B Whether landing gear legs airplane emerge wing fuselage step basically same Bend small hook about A-in diameter end piece %2-in music wire easiest way to anneal first heating cherry-red propane torch flame letting cool slowly Using wire bending gadgets available will also help Remove wheel gear leg Holding wire hook will call anchor point now about 2 above axle shaft using permanent marker mark both anchor point gear leg meet see photo Bend end anchor point parallel gear leg cut off about inch beyond bend Rough up file Dremel tool bind solder gear leg hook itself 2 above axle shown photo Ualess using 4-in-dia wheels spacing will allow reattach wheels airplane removing anchor points Repeat procedure exactly other gear leg B plane has dural gear youre luck easier two methods Cut two rounded teardrop54 Model Aviation 1-ULL SIZE PARTS TEMPLATES ALL PARTS OF 1/8-IN BIRCH PLYWOOD UNLESS OTHERWISE NOTED MAIN SKI PATTERN N LONG 00 MAIN SKI SPINE MAIN SKINOSE SKI DOUBLERDOUBLE R NOSE SKI SPINE MAIN SKI KEEL N PLYWOOD NOSE SKI KEEL IN PLYWOOD SECTION THROUGH CENTER OF SKI AT AXLE HOLE NOSE SKI PATTERN IL U V Left Alternate anchor point dural gear Pattern drawn 1A6-in aluminum Right Finished alternate anchor point note 2-in centers Left Here alternate anchor point place Slight outward bend places top hole directly over center spine Right Berklcy Steeion excellent material use cables An S-hook easiest way attach forward end spring spine shaped anchor points A6-thick aluminum shown templates see photo Drill A-in-dia hole small end large end drill hole exactly fit axle threads distance center center two holes should 1 / 2 exact length critical long two pieces identical see photo Remove axle shafts insert threaded ends through larger holes reassemble tightening securely anchor points should inside landing gear oriented straight up axle can bend small angle outward near top anchor points put A-in hole directly over ski center isnt necessary see photo Depending type nose gear ship has may have use little ingenuity installing anchor point spring cable look illustrations should give enough ideas work Most sport aircraft use straight nose gear leg short wire loop anchor point soldered two inches above axle will work fine Finish skis according favorite method keep light used Sherwin-Williams Zelon primer red automotive engine paint epoxy finish such K&B Hobby Poxy would probably better keep bottoms glass-smooth wax good automotive wax before first take out couple times year thereafter Mounting adjusting skis Install both main skis using wheel collars both sides necessary keep binding must swivel freely axles Sunbelters curved end goes front curving up Suspend ship its wing tips eyeball angle about 50 nose-up ski Loop piece steel cable Steelon brand nylon-covered fishing leader great anchor point above axle A6 hole rear end spine have angle set crimp using small lengths brass aluminum tubing shown photo sets angle-of-attack ski gentle finger pressure rear edge ski should raise its nose beyond angle Duplicate angle exactly other main ski have dural gear happen get aligmnent off hair can just loosen axle rotate anchor point bit final step youll need find couple identical wire springsapproxi mately 3A6-in dia couple inches long will local hardware store should have assortment junk box doesnt really impatient couple #64 rubberbands will work Err side making springs rubberbands too weak rather too strong make too strong could exert enough leverage nose over lightweight tail-dragger Install springs anchor point above axle front end spine After doing test knee-action skis pressing down front end finger should give easily spring quickly back original position released Make sure tight pulling down couple inches letting go anchor points loose cheated using smaller wire youll find out specified %2-in wire paragraph anything smaller will bend out shape under leverage would ordinarily no problem except two skis return fairly close identical nose-up position will find asymmetrical flight load skisa situation sufficient set heart popping like pacemaker microwave cook-off until get bird ground again tip arrive field set model car hood tailgate several minutes before put down snow set warm skis directly snow will melt little freeze chunks snow ice sticking bottoms Its easy tell youve done takes full power taxi out after snow has disappeared youll find can still fly skis until grass greens up Just sure stay grass similarly cushioned surface Asphalt other hard-surface runways eat up keels first 20 ft ugly things nice Continued page 164 56 Model Aviation everyone seemed have great time special thanks workers made such great race missed missed good always next year TOP 10 FINISHERS NMPRA 0500 Championship Race P1 Racer 1 AlIen 2 Bartle 3 Gates 4 Benezra 5 Eide 6 Johnson 7 Greer 8 Klien 9 Demay 10 Cranfill Plane V-Tail UT-Tail Scat Oat V-Tail 0500 0500 Q500 0500 Q500 Q500 Ricky Eng R R R w R R R R R R Best PtTime 3012141 2811993 2512208 2411956 2312172 2212752 2112101 2012770 1912073 1913064 Engines R i W a know lot things use build models can very toxic very careful handling few things Im sure miss Methyl alcohol thing us use cleaning up engines wiping down plane ore painting cheap some us probably overuse long ago received letter Joe Sulli van Ja-Lea Co Dallas TX Joe brought attention following very interesting informa tion methyl alcohol will skip over de scription go toxicology Methyl alcohol possesses distinct narcotic prop erties also slight irritant mucous membranes Its main toxic effect exerted upon nervous system particularly optic nerves possibly retinae effect upon eyes has attributed optic neuritis sub sides followed atrophy optic nerve Once absorbed methyl alcohol very slowly eliminated Coma resulting massive exposures may last long two four days human body products formed its oxi dation formaldehyde formic acid both toxic Because slowness elimi nated methyl alcohol should regarded cu mulative poison Though single exposures fumes may cause no harmful effect daily expo sure may result accumulation sufficient methyl alcohol body cause illness Severe exposures may cause dizziness uncon sciousness sighing respiration cardiac depres sionand eventually death Stock too Im.dists Shipment zEIVDAH 0-42 37 cu In $24995 New Onedro 40 coi 13bering epine starter $15895 Reg Qoedre 40 *12216 Brieghelle flywheel 96 Reg Qoede 40 Power Aeeenbiy Only points $6895 QUADRA orZENOAH REPAIR $1000 pine panel Jim Meeser ERCOUPE PLANS $2395 FULL-KIT $23995 Jim Mono TOMAHAWK PLANS $2396 FULL-KIT $23995 Jim Meeser J3 KTTSN PLANS $2996 FIJLLKI1 $21995 510 KADET SENIOR KIT $4796 Ineve $20001 SIG KADET SENIORITA KIT $3495 note $15003 ZENOAN G-22 96 ZENOAN 0-38 $15995 FLOATS 48114 noel core $2195 complete kit $4796 10 WWl WHEELS 6 P1K Spring Stertor $2495 PLANS SUPER STEARMAN 114 lliodfreyl $2896 1I3TAYLORCRAFTor1/3CIJS Nelitn $2996 VOLKOPLANE 1/3 Chicken Cherliel $2395 Servo H4$2 42 no $1296 WoId 5-16 Irge models $4495 Poop elI noon ER TOP PUT OYNATHRUST 20% OFF U S Onedro FUEL TANKS16 32 $596 FIBERGLASSARROWSHAFTS 5/16 o32 long $for$11 95 24 Hoor Sow/so 9250 pontoon Senk Check ore o JIM MESSERS QUALITY MODEL PRODUCTS Valley Wow Dr Box 43 Allegany NY 14706 exposure less severe first symptoms may blurring vision photopho bia conjunctivitis followed develop ment definite eye lesions may head ache gastrointestinal disturbances dizziness feeling intoxication visual symp toms may clear temporarily recur later progress actual blindness Irritation mucous membranes throat respiratory tract peripheral neuritis occasionally symptoms referable other lesions ner vous system have reported skin may come dry cracked due solvent action methyl alcohol guess cant too careful think will pay little attention what chemicals use hobby lot new rules proposals up vote district Contest Board members Let people know feel Yes can fluence job support what AMA member wantnot just what feel Communicate Editors note Next month s Competition Newsletter should list rules proposals have survived Initial Vote Contest Boards last vote boards must make before rules proposals become accepted 1990/91 Final Vote votes deadline May 1 want influence district Contest Board member II have before RMcM next issue See races Skis/Hicks Continued page 56 smooth ski bottoms field runway surface synthetic mesh material paper mill dryer belt 11-lb sport ship skis lifts off surface though wheels couple flights seem have done no damage skis make up ski mold yourself pass around buddies Youll find couple evenings spent little project will very rewarding get up nerve touch-and-go local bayou things sure let know might come up whole new contest event About author Graham Hicks Build THORP T18 low-cost foam/wood materials Send $200 latest airplanes plans list Dozens available uts R/C FREE Foam Sources Foam Cutters Ni-Chrome Hard Shell Finishes Giant Foam Wings R/C Skydiver Etc FOAM SCALE MODELS Box 662MA-1 St Croix Falls WI 54024 164 Model Aviation CA MASK CA glue works wonders building models right Unfortunately gives ott enough fumes knock vulture off carcass modelers have suffered medical problems after inhaling CA fumes take chances special vapor respirator filters CA fumes soft face mask adjustable straps comfortably fits face sizes easy breathing valve allows prolonged use providing dependable filtering concentrations up 1000 PPM though rugged industrial mask light weight elimi nate fatigue Dont get gassed CA Get protected Order CA Mask today Just $1247 shipping cheaper hospital visit Money order Master Charge Visa include expiration date check allow 20 days clear Sorry no CODs Pelwan Enterprises 2540 RIDGE ROAD LANSING ILLINOIS 60438 Phone 895-8151 6B 1/5 AEBONCA L16B INe SPAN 2 OR 4 CYCLE60 80 TGfl FEATURED IN MAY 87 SCAlE R/C NOD 1/6 RYAN Ml MAJIPIAIE 72 IN SPAN 2 OR 4 CYClE e60 80 ENCfl FATHER OF THE SPISIT OF ST S 1/4 AERONCA L3 105 IN SPAN 2 OR 4 CYCLE90 15 EBGINFS UeSAeAFe W1II GRASSHOPPER 1/4 DRUISE TURDUIIT 65 IN SPAN 2 OR 4 CYCLE e60 80 tGflIE5 THE MT FAItOUS OF HOMEBUILTS ROLLED PLAN SE & MANUAL $2500 SHPING PREPA NY S TAX FISERGIASS COIlS NEEDED FOR AERONCA L16B & L3--FROM FISERGIASS MASTER AERO PLANS N PARTS PO BOX 939 N NY 14760 i2 UAL PLANS HISTORIC AINCRAFI QUAY BARBER MODELS 2710$ Botternot Rdse AU LOTS $12995Norih 0/meted 00044070 kit prices plus shipping 2161 7776172 credit card Welcome OHIO residents add 1% tax tiCs ooeNeCN"0 Iek u v S 5 1S. TOIE C&T SHOESTRING c1u60 902 aTROi io tas WEIGHT Ery/ouss/sO CONSTRUCTION llTIi DilAWflIGS & DATA FOR FORiRiLL 120 PYLON SPORT OR STANDOFF SCALE RADIO CONTROL SHORT KITS FOR THE SPORT MODELER BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LINE DESIGNED BY THE PROFESSIONAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WING AND TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND FUN TO FLY VISIT OUR OUTLET STORE AT IS MORGAN STREET IN CRYSTAL LAKE IL Phone 815/459-0417 THESE TWINS WERE DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT IS HARD TO BEAT THEY HAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE P-38 LIGHTNING 70 SPAN . 7495 FOR 25 TO 50 ENGINES A-26 INVADER 68 SPAN . 6495 8%iWG MEG MORE SINGLE ENGINE FIGHTERS FOR 25 TO 50 ENGINES AGM2 ZERO 54 SPAN3750 F-AD TOMAHAWK 55 SPAN3750 P-39 AIRACOBRA 55 SPAN3750 F-SlD MUSTANG 54 SPAN3750 C202 FOLGORE 56 SPAN3750 FOCKE WULF 90 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIREWALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD 5750 TO WING MFG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND 5350 FOR PRODUCTS CATALOG native Mississippian active modeling since late 1940s retired Navy officer lives 900 Main Ave La Grande OR 97850 recently published article Chip Net Safety Baffler August 1987 Model Aviation Support/Palko Continued page 59 member people neigh bors friends like support Tell something need want Tell something dont like Speak up always bear mind much have done try express criticisms sug gestions diplomatically can FF Nats/Murphy Continued page 63 fectly constructed logged six maxes top Bob Dunhams Motovator gale force such saw least two flights model went up slight left pattern rather desired righthand groove Catons well-adjusted Hbird seemed impervious distortions its power pattern airplane must un doubtedly regarded finest AMA class model contest Although AMA Gas classes av eraged between 35-40 entries per event Open D Gas drew respectable 17 contend ers pair Texans down Al amo way would carry home top hard ware baffle big uns Lee Camp bell quipped earlier hed like see Nit Wit win Pearl coming sec ond score could simply read Nit Pearl two outcome instead Pearl Pearl two Marvin Maces Pilfered Pearl bested teammate Jim Summersetts similar design mere sev en seconds Third-place winner Bill Dunlops carbon fiber Ex-Cels went OOS out of-sight fourth max Seelig de thermalizer timer failed function model spotted next day air 20 miles north across Wabash River Indiana average Gas flier AMA class events appeared relatively less scien tific Rubber power counterpart regard use exotic thermal detection devices fiberglass pole adorned lar tape served Gas fliers standard di vining rod seemed satisfied keeping eye some other fellows pole other guy always tal ler pole located better posi tion anyway contrast gumband gang came well equipped deci mal-reading Haverhill digital thermometerson-a-stick accompanied assorted ver sions bubble machine contraption rang ing totally commercial custom-made origin something mystery bubble machines could deliver observable thermal detection ground winds streaking along horizontal paths seldom higher 10 ft off turf case often good air above ground gusts boom ers prevalent weekend long Fred Blom captured coveted Wake field trophy Ed Konefes Martin Richardson close behind popular P-30 event saw Frank Heeb eking out onesecond win over relative newcomer Bill Jackson obviously learning fast get maximum energy out rubberband First third places four seconds apart event longtime rubberband expert Gawg Perryman log ging four-second deficit third place Completing first days event card A-i Towline 020 Cargo Bill Schlarb took A-i Towline going away max-out-plus model flown Cargo belonging Robert Nich ols bucked wind lifting respectable 45 oz Nichols Cox 020 must surely suf fering hernia problem after feat No report Free Flight session com plete unless preceded account weather case Saturdays weather however can brief Conditions second day competition ex act replica Fridays sunny windy Ed Kecks model designed Brad Bane well named Windwhip attacked wayward gusts admira ble consistency Keck turned six maxes Charles Caton pulled up 7 sec short 13 sec ahead veteran Sal Taibis Starduster 900 Sal lone Cali fornia entrant motored across US once again seemingly ageless 56 Chevy will have turned over 600000 miles its speedometer trek home 49th consecutive Natsdisre garding course World War II years Nats held Thats some attendance record Keith Fulmer took V3A second year row though thought saw him dork model process Nat Comforts Max Hog missed third max 3 sec puffing him second slot James Thoruberry pulled tugged A-2 Towline first place FlA saw Andrew Barron stumbling around corn stubble field couple times attempting circle tow model occurred time could have moved about 30 ft left onto grass strip lined run way less hazardous situationbut maybe thermals concentrated over corn stubble Oh well what know Anyway Andy chugged third place hind Tennessee dance man 0 C Stewart Coupe dHiver Lawrenceville resi dent Bud Brown led scant six seconds over omnipresent Gawg Perryman George once heard say powers Gas jobs A-in Pirelli Roger Wathen Indianapolis brought down vanload youngsters participate February 1989 165 I-fl FOR 40 TO 60 ENGINE
Edition: Model Aviation - 1989/02
Page Numbers: 52, 53, 54, 55, 56, 164, 165
THEYRE EASY AND FAST make theyll add very little weight airplane Since skis impart degree stability model wheels may find did reduce ground looping tendency takeoff landing plywood skis lighter metal ones have seen also use knee action positioning system closer full-scale torque rod system article describes procedures making ski Double parts making main gear set making nose gear length width measurements will have modified Suggested full-size templates parts included Construction Cut ski blank shown photo sheet A-in thick birch model aircraft plywood Lite Ply door covering making main gear ski 40- 60-size ship appropriate size would order 2 wide 12 long Round point nose liking round sides edges Straight sides sharp edges give ski its good tracking properties Make mold press piece 2 x 4 approximately 18 long Draw two parallel lines extending lengthwise 34 in from top bottom edges Trace 4-in radius arc lower horizontal line upper intersecting about Carefully cut along line band saw separate two pieces leaving slightly exaggerated profile ski see photo Temporarily insert few small A-in scrap plywood spacers along cut line represent thickness ski blank will inserted shaping Clamp two pieces back together drill %-in hole edge-to-edge about 1 forward tip radius arc front end Measuring front end radius arc curve drill another %-in hole exactly length ski blank rear bolt will go through Top Authors 66-in-span 11-lb Big Firecat trucks low approach flaps down skis set light touch down Above Left Shown wood parts skI Gussets 1/a-In-sq spruce balsa shown full-size parts layout Above Right Band saw cut line shown heavy black 18-in-iong 2 x 4 mold Rear bolt stops blank sliding rearward during clamping 52 Model Aviation Left After marking centerline pivot point axle marked about 40% forward trailing edge 12-in ski 5 rear works well Right wood parts assembled except keel Note gentle graceful curve upward skis dont have pug-nosed hole will act stop prevent blank slipping rearward clamp mold Insert 41h-in-long 5A6-indiameter carriage bolt washers end hole tighten nuts mold finished youre ready form ski Note 3A-in hole 546-in bolt intentionally sloppy fit reasons will clear later Bring pan water rapid boil kitchen stove thrust front four inches ski blank three minutes shown photo Have mold ready three minutes up immediately position ski mold rear ski just touches rear bolt Quickly tighten down both bolts ski blank forced curve mold see photo Remember ski will relax spring back bit take out mold bit overcurve excess tension necessary mold Allow dry several hours front fireplace overnight shop Make second ski exactly same way preferably same piece plywood making set trike gear ship shorten narrow dimensions nose gear ski Seven inches long inch-and-a-half wide works well 40- 60-size airplane Mold using method described above same mold can drill second hole rear stop bolt like Cut spine doubler parts again using A-in ply Dont sand anything yet ski will look better sand after parts glued together Mark centerlines top bottom three skis main skis put mark 5 rear will serve locator point axle shaft see photo find point Left fully assembled ski keel glued bottom keel position approximate should generally rear Right hole axle bushing being drilled through diamond-shaped doubler Use care get hole absolutely square February 1989 53 Left Make sure immerse least four inches birch plywood ski blank rapidly boiling water three minutes make pliable Right Clamp ski blank shaped mold let dry thoroughly Preferably should allow overnight photos Ed Barton Left Axle bushing being pressed spine Note use scrap plywood prevent jaw pliers damaging doubler Right Marking intersection landing gear wire %2-in anchor point see text alternate method Wire bends easily annealed first Left Wrap joint bright copper wire solder using hot heavy iron Silver solder 90% tin 4% silver sold hardware stores works well must use flux Right Final assembly showing cable spring attachments Seal paint skis before attaching cables nose gear ski lay flat surface such workbench kitchen counter view side ground level Mark point ski just begins curve up away surface axle point should exactly halfway between point rear edge ski Using slow-setting epoxy carefully glue spines /8-in-sq balsa spruce gussets onto three skis Soft spruce best hard balsa will work nearly well omit gussets add great deal strength handle side loads may necessary sand little curve bottom edge nose gear ski spine make match ski profile certain epoxy sets axle locations remain exactly above respective marks skis spines remain straight respect centerlines dry epoxy diamondshaped doublers spines shown Round front rear ends keels sandpaper epoxy along bottom centerlines skis see photos After determining diameter axle shafts use drill press drill hole 1/16 larger figure through exact center doublers ski Make sure hole square possible relation ski see photo Cut %-in-long piece brass tubing outside diameter same size drill gently tap press hole form bushing see photo Drill /16 hole end spine shown youre ready sand finish ski Sand enough remove fuzz splinters dont overdo Again round bottom edges skisas full-size skis sharper better track snow However neatly rounded edge spine doublers will make nicer looking ski Attaching skis type landing gear ship will determine what kind anchor points will need plane has wire gear legs follow paragraph has dural aluminum gear go paragraph B Whether landing gear legs airplane emerge wing fuselage step basically same Bend small hook about A-in diameter end piece %2-in music wire easiest way to anneal first heating cherry-red propane torch flame letting cool slowly Using wire bending gadgets available will also help Remove wheel gear leg Holding wire hook will call anchor point now about 2 above axle shaft using permanent marker mark both anchor point gear leg meet see photo Bend end anchor point parallel gear leg cut off about inch beyond bend Rough up file Dremel tool bind solder gear leg hook itself 2 above axle shown photo Ualess using 4-in-dia wheels spacing will allow reattach wheels airplane removing anchor points Repeat procedure exactly other gear leg B plane has dural gear youre luck easier two methods Cut two rounded teardrop54 Model Aviation 1-ULL SIZE PARTS TEMPLATES ALL PARTS OF 1/8-IN BIRCH PLYWOOD UNLESS OTHERWISE NOTED MAIN SKI PATTERN N LONG 00 MAIN SKI SPINE MAIN SKINOSE SKI DOUBLERDOUBLE R NOSE SKI SPINE MAIN SKI KEEL N PLYWOOD NOSE SKI KEEL IN PLYWOOD SECTION THROUGH CENTER OF SKI AT AXLE HOLE NOSE SKI PATTERN IL U V Left Alternate anchor point dural gear Pattern drawn 1A6-in aluminum Right Finished alternate anchor point note 2-in centers Left Here alternate anchor point place Slight outward bend places top hole directly over center spine Right Berklcy Steeion excellent material use cables An S-hook easiest way attach forward end spring spine shaped anchor points A6-thick aluminum shown templates see photo Drill A-in-dia hole small end large end drill hole exactly fit axle threads distance center center two holes should 1 / 2 exact length critical long two pieces identical see photo Remove axle shafts insert threaded ends through larger holes reassemble tightening securely anchor points should inside landing gear oriented straight up axle can bend small angle outward near top anchor points put A-in hole directly over ski center isnt necessary see photo Depending type nose gear ship has may have use little ingenuity installing anchor point spring cable look illustrations should give enough ideas work Most sport aircraft use straight nose gear leg short wire loop anchor point soldered two inches above axle will work fine Finish skis according favorite method keep light used Sherwin-Williams Zelon primer red automotive engine paint epoxy finish such K&B Hobby Poxy would probably better keep bottoms glass-smooth wax good automotive wax before first take out couple times year thereafter Mounting adjusting skis Install both main skis using wheel collars both sides necessary keep binding must swivel freely axles Sunbelters curved end goes front curving up Suspend ship its wing tips eyeball angle about 50 nose-up ski Loop piece steel cable Steelon brand nylon-covered fishing leader great anchor point above axle A6 hole rear end spine have angle set crimp using small lengths brass aluminum tubing shown photo sets angle-of-attack ski gentle finger pressure rear edge ski should raise its nose beyond angle Duplicate angle exactly other main ski have dural gear happen get aligmnent off hair can just loosen axle rotate anchor point bit final step youll need find couple identical wire springsapproxi mately 3A6-in dia couple inches long will local hardware store should have assortment junk box doesnt really impatient couple #64 rubberbands will work Err side making springs rubberbands too weak rather too strong make too strong could exert enough leverage nose over lightweight tail-dragger Install springs anchor point above axle front end spine After doing test knee-action skis pressing down front end finger should give easily spring quickly back original position released Make sure tight pulling down couple inches letting go anchor points loose cheated using smaller wire youll find out specified %2-in wire paragraph anything smaller will bend out shape under leverage would ordinarily no problem except two skis return fairly close identical nose-up position will find asymmetrical flight load skisa situation sufficient set heart popping like pacemaker microwave cook-off until get bird ground again tip arrive field set model car hood tailgate several minutes before put down snow set warm skis directly snow will melt little freeze chunks snow ice sticking bottoms Its easy tell youve done takes full power taxi out after snow has disappeared youll find can still fly skis until grass greens up Just sure stay grass similarly cushioned surface Asphalt other hard-surface runways eat up keels first 20 ft ugly things nice Continued page 164 56 Model Aviation everyone seemed have great time special thanks workers made such great race missed missed good always next year TOP 10 FINISHERS NMPRA 0500 Championship Race P1 Racer 1 AlIen 2 Bartle 3 Gates 4 Benezra 5 Eide 6 Johnson 7 Greer 8 Klien 9 Demay 10 Cranfill Plane V-Tail UT-Tail Scat Oat V-Tail 0500 0500 Q500 0500 Q500 Q500 Ricky Eng R R R w R R R R R R Best PtTime 3012141 2811993 2512208 2411956 2312172 2212752 2112101 2012770 1912073 1913064 Engines R i W a know lot things use build models can very toxic very careful handling few things Im sure miss Methyl alcohol thing us use cleaning up engines wiping down plane ore painting cheap some us probably overuse long ago received letter Joe Sulli van Ja-Lea Co Dallas TX Joe brought attention following very interesting informa tion methyl alcohol will skip over de scription go toxicology Methyl alcohol possesses distinct narcotic prop erties also slight irritant mucous membranes Its main toxic effect exerted upon nervous system particularly optic nerves possibly retinae effect upon eyes has attributed optic neuritis sub sides followed atrophy optic nerve Once absorbed methyl alcohol very slowly eliminated Coma resulting massive exposures may last long two four days human body products formed its oxi dation formaldehyde formic acid both toxic Because slowness elimi nated methyl alcohol should regarded cu mulative poison Though single exposures fumes may cause no harmful effect daily expo sure may result accumulation sufficient methyl alcohol body cause illness Severe exposures may cause dizziness uncon sciousness sighing respiration cardiac depres sionand eventually death Stock too Im.dists Shipment zEIVDAH 0-42 37 cu In $24995 New Onedro 40 coi 13bering epine starter $15895 Reg Qoedre 40 *12216 Brieghelle flywheel 96 Reg Qoede 40 Power Aeeenbiy Only points $6895 QUADRA orZENOAH REPAIR $1000 pine panel Jim Meeser ERCOUPE PLANS $2395 FULL-KIT $23995 Jim Mono TOMAHAWK PLANS $2396 FULL-KIT $23995 Jim Meeser J3 KTTSN PLANS $2996 FIJLLKI1 $21995 510 KADET SENIOR KIT $4796 Ineve $20001 SIG KADET SENIORITA KIT $3495 note $15003 ZENOAN G-22 96 ZENOAN 0-38 $15995 FLOATS 48114 noel core $2195 complete kit $4796 10 WWl WHEELS 6 P1K Spring Stertor $2495 PLANS SUPER STEARMAN 114 lliodfreyl $2896 1I3TAYLORCRAFTor1/3CIJS Nelitn $2996 VOLKOPLANE 1/3 Chicken Cherliel $2395 Servo H4$2 42 no $1296 WoId 5-16 Irge models $4495 Poop elI noon ER TOP PUT OYNATHRUST 20% OFF U S Onedro FUEL TANKS16 32 $596 FIBERGLASSARROWSHAFTS 5/16 o32 long $for$11 95 24 Hoor Sow/so 9250 pontoon Senk Check ore o JIM MESSERS QUALITY MODEL PRODUCTS Valley Wow Dr Box 43 Allegany NY 14706 exposure less severe first symptoms may blurring vision photopho bia conjunctivitis followed develop ment definite eye lesions may head ache gastrointestinal disturbances dizziness feeling intoxication visual symp toms may clear temporarily recur later progress actual blindness Irritation mucous membranes throat respiratory tract peripheral neuritis occasionally symptoms referable other lesions ner vous system have reported skin may come dry cracked due solvent action methyl alcohol guess cant too careful think will pay little attention what chemicals use hobby lot new rules proposals up vote district Contest Board members Let people know feel Yes can fluence job support what AMA member wantnot just what feel Communicate Editors note Next month s Competition Newsletter should list rules proposals have survived Initial Vote Contest Boards last vote boards must make before rules proposals become accepted 1990/91 Final Vote votes deadline May 1 want influence district Contest Board member II have before RMcM next issue See races Skis/Hicks Continued page 56 smooth ski bottoms field runway surface synthetic mesh material paper mill dryer belt 11-lb sport ship skis lifts off surface though wheels couple flights seem have done no damage skis make up ski mold yourself pass around buddies Youll find couple evenings spent little project will very rewarding get up nerve touch-and-go local bayou things sure let know might come up whole new contest event About author Graham Hicks Build THORP T18 low-cost foam/wood materials Send $200 latest airplanes plans list Dozens available uts R/C FREE Foam Sources Foam Cutters Ni-Chrome Hard Shell Finishes Giant Foam Wings R/C Skydiver Etc FOAM SCALE MODELS Box 662MA-1 St Croix Falls WI 54024 164 Model Aviation CA MASK CA glue works wonders building models right Unfortunately gives ott enough fumes knock vulture off carcass modelers have suffered medical problems after inhaling CA fumes take chances special vapor respirator filters CA fumes soft face mask adjustable straps comfortably fits face sizes easy breathing valve allows prolonged use providing dependable filtering concentrations up 1000 PPM though rugged industrial mask light weight elimi nate fatigue Dont get gassed CA Get protected Order CA Mask today Just $1247 shipping cheaper hospital visit Money order Master Charge Visa include expiration date check allow 20 days clear Sorry no CODs Pelwan Enterprises 2540 RIDGE ROAD LANSING ILLINOIS 60438 Phone 895-8151 6B 1/5 AEBONCA L16B INe SPAN 2 OR 4 CYCLE60 80 TGfl FEATURED IN MAY 87 SCAlE R/C NOD 1/6 RYAN Ml MAJIPIAIE 72 IN SPAN 2 OR 4 CYClE e60 80 ENCfl FATHER OF THE SPISIT OF ST S 1/4 AERONCA L3 105 IN SPAN 2 OR 4 CYCLE90 15 EBGINFS UeSAeAFe W1II GRASSHOPPER 1/4 DRUISE TURDUIIT 65 IN SPAN 2 OR 4 CYCLE e60 80 tGflIE5 THE MT FAItOUS OF HOMEBUILTS ROLLED PLAN SE & MANUAL $2500 SHPING PREPA NY S TAX FISERGIASS COIlS NEEDED FOR AERONCA L16B & L3--FROM FISERGIASS MASTER AERO PLANS N PARTS PO BOX 939 N NY 14760 i2 UAL PLANS HISTORIC AINCRAFI QUAY BARBER MODELS 2710$ Botternot Rdse AU LOTS $12995Norih 0/meted 00044070 kit prices plus shipping 2161 7776172 credit card Welcome OHIO residents add 1% tax tiCs ooeNeCN"0 Iek u v S 5 1S. TOIE C&T SHOESTRING c1u60 902 aTROi io tas WEIGHT Ery/ouss/sO CONSTRUCTION llTIi DilAWflIGS & DATA FOR FORiRiLL 120 PYLON SPORT OR STANDOFF SCALE RADIO CONTROL SHORT KITS FOR THE SPORT MODELER BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LINE DESIGNED BY THE PROFESSIONAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WING AND TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND FUN TO FLY VISIT OUR OUTLET STORE AT IS MORGAN STREET IN CRYSTAL LAKE IL Phone 815/459-0417 THESE TWINS WERE DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT IS HARD TO BEAT THEY HAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE P-38 LIGHTNING 70 SPAN . 7495 FOR 25 TO 50 ENGINES A-26 INVADER 68 SPAN . 6495 8%iWG MEG MORE SINGLE ENGINE FIGHTERS FOR 25 TO 50 ENGINES AGM2 ZERO 54 SPAN3750 F-AD TOMAHAWK 55 SPAN3750 P-39 AIRACOBRA 55 SPAN3750 F-SlD MUSTANG 54 SPAN3750 C202 FOLGORE 56 SPAN3750 FOCKE WULF 90 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIREWALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD 5750 TO WING MFG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND 5350 FOR PRODUCTS CATALOG native Mississippian active modeling since late 1940s retired Navy officer lives 900 Main Ave La Grande OR 97850 recently published article Chip Net Safety Baffler August 1987 Model Aviation Support/Palko Continued page 59 member people neigh bors friends like support Tell something need want Tell something dont like Speak up always bear mind much have done try express criticisms sug gestions diplomatically can FF Nats/Murphy Continued page 63 fectly constructed logged six maxes top Bob Dunhams Motovator gale force such saw least two flights model went up slight left pattern rather desired righthand groove Catons well-adjusted Hbird seemed impervious distortions its power pattern airplane must un doubtedly regarded finest AMA class model contest Although AMA Gas classes av eraged between 35-40 entries per event Open D Gas drew respectable 17 contend ers pair Texans down Al amo way would carry home top hard ware baffle big uns Lee Camp bell quipped earlier hed like see Nit Wit win Pearl coming sec ond score could simply read Nit Pearl two outcome instead Pearl Pearl two Marvin Maces Pilfered Pearl bested teammate Jim Summersetts similar design mere sev en seconds Third-place winner Bill Dunlops carbon fiber Ex-Cels went OOS out of-sight fourth max Seelig de thermalizer timer failed function model spotted next day air 20 miles north across Wabash River Indiana average Gas flier AMA class events appeared relatively less scien tific Rubber power counterpart regard use exotic thermal detection devices fiberglass pole adorned lar tape served Gas fliers standard di vining rod seemed satisfied keeping eye some other fellows pole other guy always tal ler pole located better posi tion anyway contrast gumband gang came well equipped deci mal-reading Haverhill digital thermometerson-a-stick accompanied assorted ver sions bubble machine contraption rang ing totally commercial custom-made origin something mystery bubble machines could deliver observable thermal detection ground winds streaking along horizontal paths seldom higher 10 ft off turf case often good air above ground gusts boom ers prevalent weekend long Fred Blom captured coveted Wake field trophy Ed Konefes Martin Richardson close behind popular P-30 event saw Frank Heeb eking out onesecond win over relative newcomer Bill Jackson obviously learning fast get maximum energy out rubberband First third places four seconds apart event longtime rubberband expert Gawg Perryman log ging four-second deficit third place Completing first days event card A-i Towline 020 Cargo Bill Schlarb took A-i Towline going away max-out-plus model flown Cargo belonging Robert Nich ols bucked wind lifting respectable 45 oz Nichols Cox 020 must surely suf fering hernia problem after feat No report Free Flight session com plete unless preceded account weather case Saturdays weather however can brief Conditions second day competition ex act replica Fridays sunny windy Ed Kecks model designed Brad Bane well named Windwhip attacked wayward gusts admira ble consistency Keck turned six maxes Charles Caton pulled up 7 sec short 13 sec ahead veteran Sal Taibis Starduster 900 Sal lone Cali fornia entrant motored across US once again seemingly ageless 56 Chevy will have turned over 600000 miles its speedometer trek home 49th consecutive Natsdisre garding course World War II years Nats held Thats some attendance record Keith Fulmer took V3A second year row though thought saw him dork model process Nat Comforts Max Hog missed third max 3 sec puffing him second slot James Thoruberry pulled tugged A-2 Towline first place FlA saw Andrew Barron stumbling around corn stubble field couple times attempting circle tow model occurred time could have moved about 30 ft left onto grass strip lined run way less hazardous situationbut maybe thermals concentrated over corn stubble Oh well what know Anyway Andy chugged third place hind Tennessee dance man 0 C Stewart Coupe dHiver Lawrenceville resi dent Bud Brown led scant six seconds over omnipresent Gawg Perryman George once heard say powers Gas jobs A-in Pirelli Roger Wathen Indianapolis brought down vanload youngsters participate February 1989 165 I-fl FOR 40 TO 60 ENGINE
Edition: Model Aviation - 1989/02
Page Numbers: 52, 53, 54, 55, 56, 164, 165
THEYRE EASY AND FAST make theyll add very little weight airplane Since skis impart degree stability model wheels may find did reduce ground looping tendency takeoff landing plywood skis lighter metal ones have seen also use knee action positioning system closer full-scale torque rod system article describes procedures making ski Double parts making main gear set making nose gear length width measurements will have modified Suggested full-size templates parts included Construction Cut ski blank shown photo sheet A-in thick birch model aircraft plywood Lite Ply door covering making main gear ski 40- 60-size ship appropriate size would order 2 wide 12 long Round point nose liking round sides edges Straight sides sharp edges give ski its good tracking properties Make mold press piece 2 x 4 approximately 18 long Draw two parallel lines extending lengthwise 34 in from top bottom edges Trace 4-in radius arc lower horizontal line upper intersecting about Carefully cut along line band saw separate two pieces leaving slightly exaggerated profile ski see photo Temporarily insert few small A-in scrap plywood spacers along cut line represent thickness ski blank will inserted shaping Clamp two pieces back together drill %-in hole edge-to-edge about 1 forward tip radius arc front end Measuring front end radius arc curve drill another %-in hole exactly length ski blank rear bolt will go through Top Authors 66-in-span 11-lb Big Firecat trucks low approach flaps down skis set light touch down Above Left Shown wood parts skI Gussets 1/a-In-sq spruce balsa shown full-size parts layout Above Right Band saw cut line shown heavy black 18-in-iong 2 x 4 mold Rear bolt stops blank sliding rearward during clamping 52 Model Aviation Left After marking centerline pivot point axle marked about 40% forward trailing edge 12-in ski 5 rear works well Right wood parts assembled except keel Note gentle graceful curve upward skis dont have pug-nosed hole will act stop prevent blank slipping rearward clamp mold Insert 41h-in-long 5A6-indiameter carriage bolt washers end hole tighten nuts mold finished youre ready form ski Note 3A-in hole 546-in bolt intentionally sloppy fit reasons will clear later Bring pan water rapid boil kitchen stove thrust front four inches ski blank three minutes shown photo Have mold ready three minutes up immediately position ski mold rear ski just touches rear bolt Quickly tighten down both bolts ski blank forced curve mold see photo Remember ski will relax spring back bit take out mold bit overcurve excess tension necessary mold Allow dry several hours front fireplace overnight shop Make second ski exactly same way preferably same piece plywood making set trike gear ship shorten narrow dimensions nose gear ski Seven inches long inch-and-a-half wide works well 40- 60-size airplane Mold using method described above same mold can drill second hole rear stop bolt like Cut spine doubler parts again using A-in ply Dont sand anything yet ski will look better sand after parts glued together Mark centerlines top bottom three skis main skis put mark 5 rear will serve locator point axle shaft see photo find point Left fully assembled ski keel glued bottom keel position approximate should generally rear Right hole axle bushing being drilled through diamond-shaped doubler Use care get hole absolutely square February 1989 53 Left Make sure immerse least four inches birch plywood ski blank rapidly boiling water three minutes make pliable Right Clamp ski blank shaped mold let dry thoroughly Preferably should allow overnight photos Ed Barton Left Axle bushing being pressed spine Note use scrap plywood prevent jaw pliers damaging doubler Right Marking intersection landing gear wire %2-in anchor point see text alternate method Wire bends easily annealed first Left Wrap joint bright copper wire solder using hot heavy iron Silver solder 90% tin 4% silver sold hardware stores works well must use flux Right Final assembly showing cable spring attachments Seal paint skis before attaching cables nose gear ski lay flat surface such workbench kitchen counter view side ground level Mark point ski just begins curve up away surface axle point should exactly halfway between point rear edge ski Using slow-setting epoxy carefully glue spines /8-in-sq balsa spruce gussets onto three skis Soft spruce best hard balsa will work nearly well omit gussets add great deal strength handle side loads may necessary sand little curve bottom edge nose gear ski spine make match ski profile certain epoxy sets axle locations remain exactly above respective marks skis spines remain straight respect centerlines dry epoxy diamondshaped doublers spines shown Round front rear ends keels sandpaper epoxy along bottom centerlines skis see photos After determining diameter axle shafts use drill press drill hole 1/16 larger figure through exact center doublers ski Make sure hole square possible relation ski see photo Cut %-in-long piece brass tubing outside diameter same size drill gently tap press hole form bushing see photo Drill /16 hole end spine shown youre ready sand finish ski Sand enough remove fuzz splinters dont overdo Again round bottom edges skisas full-size skis sharper better track snow However neatly rounded edge spine doublers will make nicer looking ski Attaching skis type landing gear ship will determine what kind anchor points will need plane has wire gear legs follow paragraph has dural aluminum gear go paragraph B Whether landing gear legs airplane emerge wing fuselage step basically same Bend small hook about A-in diameter end piece %2-in music wire easiest way to anneal first heating cherry-red propane torch flame letting cool slowly Using wire bending gadgets available will also help Remove wheel gear leg Holding wire hook will call anchor point now about 2 above axle shaft using permanent marker mark both anchor point gear leg meet see photo Bend end anchor point parallel gear leg cut off about inch beyond bend Rough up file Dremel tool bind solder gear leg hook itself 2 above axle shown photo Ualess using 4-in-dia wheels spacing will allow reattach wheels airplane removing anchor points Repeat procedure exactly other gear leg B plane has dural gear youre luck easier two methods Cut two rounded teardrop54 Model Aviation 1-ULL SIZE PARTS TEMPLATES ALL PARTS OF 1/8-IN BIRCH PLYWOOD UNLESS OTHERWISE NOTED MAIN SKI PATTERN N LONG 00 MAIN SKI SPINE MAIN SKINOSE SKI DOUBLERDOUBLE R NOSE SKI SPINE MAIN SKI KEEL N PLYWOOD NOSE SKI KEEL IN PLYWOOD SECTION THROUGH CENTER OF SKI AT AXLE HOLE NOSE SKI PATTERN IL U V Left Alternate anchor point dural gear Pattern drawn 1A6-in aluminum Right Finished alternate anchor point note 2-in centers Left Here alternate anchor point place Slight outward bend places top hole directly over center spine Right Berklcy Steeion excellent material use cables An S-hook easiest way attach forward end spring spine shaped anchor points A6-thick aluminum shown templates see photo Drill A-in-dia hole small end large end drill hole exactly fit axle threads distance center center two holes should 1 / 2 exact length critical long two pieces identical see photo Remove axle shafts insert threaded ends through larger holes reassemble tightening securely anchor points should inside landing gear oriented straight up axle can bend small angle outward near top anchor points put A-in hole directly over ski center isnt necessary see photo Depending type nose gear ship has may have use little ingenuity installing anchor point spring cable look illustrations should give enough ideas work Most sport aircraft use straight nose gear leg short wire loop anchor point soldered two inches above axle will work fine Finish skis according favorite method keep light used Sherwin-Williams Zelon primer red automotive engine paint epoxy finish such K&B Hobby Poxy would probably better keep bottoms glass-smooth wax good automotive wax before first take out couple times year thereafter Mounting adjusting skis Install both main skis using wheel collars both sides necessary keep binding must swivel freely axles Sunbelters curved end goes front curving up Suspend ship its wing tips eyeball angle about 50 nose-up ski Loop piece steel cable Steelon brand nylon-covered fishing leader great anchor point above axle A6 hole rear end spine have angle set crimp using small lengths brass aluminum tubing shown photo sets angle-of-attack ski gentle finger pressure rear edge ski should raise its nose beyond angle Duplicate angle exactly other main ski have dural gear happen get aligmnent off hair can just loosen axle rotate anchor point bit final step youll need find couple identical wire springsapproxi mately 3A6-in dia couple inches long will local hardware store should have assortment junk box doesnt really impatient couple #64 rubberbands will work Err side making springs rubberbands too weak rather too strong make too strong could exert enough leverage nose over lightweight tail-dragger Install springs anchor point above axle front end spine After doing test knee-action skis pressing down front end finger should give easily spring quickly back original position released Make sure tight pulling down couple inches letting go anchor points loose cheated using smaller wire youll find out specified %2-in wire paragraph anything smaller will bend out shape under leverage would ordinarily no problem except two skis return fairly close identical nose-up position will find asymmetrical flight load skisa situation sufficient set heart popping like pacemaker microwave cook-off until get bird ground again tip arrive field set model car hood tailgate several minutes before put down snow set warm skis directly snow will melt little freeze chunks snow ice sticking bottoms Its easy tell youve done takes full power taxi out after snow has disappeared youll find can still fly skis until grass greens up Just sure stay grass similarly cushioned surface Asphalt other hard-surface runways eat up keels first 20 ft ugly things nice Continued page 164 56 Model Aviation everyone seemed have great time special thanks workers made such great race missed missed good always next year TOP 10 FINISHERS NMPRA 0500 Championship Race P1 Racer 1 AlIen 2 Bartle 3 Gates 4 Benezra 5 Eide 6 Johnson 7 Greer 8 Klien 9 Demay 10 Cranfill Plane V-Tail UT-Tail Scat Oat V-Tail 0500 0500 Q500 0500 Q500 Q500 Ricky Eng R R R w R R R R R R Best PtTime 3012141 2811993 2512208 2411956 2312172 2212752 2112101 2012770 1912073 1913064 Engines R i W a know lot things use build models can very toxic very careful handling few things Im sure miss Methyl alcohol thing us use cleaning up engines wiping down plane ore painting cheap some us probably overuse long ago received letter Joe Sulli van Ja-Lea Co Dallas TX Joe brought attention following very interesting informa tion methyl alcohol will skip over de scription go toxicology Methyl alcohol possesses distinct narcotic prop erties also slight irritant mucous membranes Its main toxic effect exerted upon nervous system particularly optic nerves possibly retinae effect upon eyes has attributed optic neuritis sub sides followed atrophy optic nerve Once absorbed methyl alcohol very slowly eliminated Coma resulting massive exposures may last long two four days human body products formed its oxi dation formaldehyde formic acid both toxic Because slowness elimi nated methyl alcohol should regarded cu mulative poison Though single exposures fumes may cause no harmful effect daily expo sure may result accumulation sufficient methyl alcohol body cause illness Severe exposures may cause dizziness uncon sciousness sighing respiration cardiac depres sionand eventually death Stock too Im.dists Shipment zEIVDAH 0-42 37 cu In $24995 New Onedro 40 coi 13bering epine starter $15895 Reg Qoedre 40 *12216 Brieghelle flywheel 96 Reg Qoede 40 Power Aeeenbiy Only points $6895 QUADRA orZENOAH REPAIR $1000 pine panel Jim Meeser ERCOUPE PLANS $2395 FULL-KIT $23995 Jim Mono TOMAHAWK PLANS $2396 FULL-KIT $23995 Jim Meeser J3 KTTSN PLANS $2996 FIJLLKI1 $21995 510 KADET SENIOR KIT $4796 Ineve $20001 SIG KADET SENIORITA KIT $3495 note $15003 ZENOAN G-22 96 ZENOAN 0-38 $15995 FLOATS 48114 noel core $2195 complete kit $4796 10 WWl WHEELS 6 P1K Spring Stertor $2495 PLANS SUPER STEARMAN 114 lliodfreyl $2896 1I3TAYLORCRAFTor1/3CIJS Nelitn $2996 VOLKOPLANE 1/3 Chicken Cherliel $2395 Servo H4$2 42 no $1296 WoId 5-16 Irge models $4495 Poop elI noon ER TOP PUT OYNATHRUST 20% OFF U S Onedro FUEL TANKS16 32 $596 FIBERGLASSARROWSHAFTS 5/16 o32 long $for$11 95 24 Hoor Sow/so 9250 pontoon Senk Check ore o JIM MESSERS QUALITY MODEL PRODUCTS Valley Wow Dr Box 43 Allegany NY 14706 exposure less severe first symptoms may blurring vision photopho bia conjunctivitis followed develop ment definite eye lesions may head ache gastrointestinal disturbances dizziness feeling intoxication visual symp toms may clear temporarily recur later progress actual blindness Irritation mucous membranes throat respiratory tract peripheral neuritis occasionally symptoms referable other lesions ner vous system have reported skin may come dry cracked due solvent action methyl alcohol guess cant too careful think will pay little attention what chemicals use hobby lot new rules proposals up vote district Contest Board members Let people know feel Yes can fluence job support what AMA member wantnot just what feel Communicate Editors note Next month s Competition Newsletter should list rules proposals have survived Initial Vote Contest Boards last vote boards must make before rules proposals become accepted 1990/91 Final Vote votes deadline May 1 want influence district Contest Board member II have before RMcM next issue See races Skis/Hicks Continued page 56 smooth ski bottoms field runway surface synthetic mesh material paper mill dryer belt 11-lb sport ship skis lifts off surface though wheels couple flights seem have done no damage skis make up ski mold yourself pass around buddies Youll find couple evenings spent little project will very rewarding get up nerve touch-and-go local bayou things sure let know might come up whole new contest event About author Graham Hicks Build THORP T18 low-cost foam/wood materials Send $200 latest airplanes plans list Dozens available uts R/C FREE Foam Sources Foam Cutters Ni-Chrome Hard Shell Finishes Giant Foam Wings R/C Skydiver Etc FOAM SCALE MODELS Box 662MA-1 St Croix Falls WI 54024 164 Model Aviation CA MASK CA glue works wonders building models right Unfortunately gives ott enough fumes knock vulture off carcass modelers have suffered medical problems after inhaling CA fumes take chances special vapor respirator filters CA fumes soft face mask adjustable straps comfortably fits face sizes easy breathing valve allows prolonged use providing dependable filtering concentrations up 1000 PPM though rugged industrial mask light weight elimi nate fatigue Dont get gassed CA Get protected Order CA Mask today Just $1247 shipping cheaper hospital visit Money order Master Charge Visa include expiration date check allow 20 days clear Sorry no CODs Pelwan Enterprises 2540 RIDGE ROAD LANSING ILLINOIS 60438 Phone 895-8151 6B 1/5 AEBONCA L16B INe SPAN 2 OR 4 CYCLE60 80 TGfl FEATURED IN MAY 87 SCAlE R/C NOD 1/6 RYAN Ml MAJIPIAIE 72 IN SPAN 2 OR 4 CYClE e60 80 ENCfl FATHER OF THE SPISIT OF ST S 1/4 AERONCA L3 105 IN SPAN 2 OR 4 CYCLE90 15 EBGINFS UeSAeAFe W1II GRASSHOPPER 1/4 DRUISE TURDUIIT 65 IN SPAN 2 OR 4 CYCLE e60 80 tGflIE5 THE MT FAItOUS OF HOMEBUILTS ROLLED PLAN SE & MANUAL $2500 SHPING PREPA NY S TAX FISERGIASS COIlS NEEDED FOR AERONCA L16B & L3--FROM FISERGIASS MASTER AERO PLANS N PARTS PO BOX 939 N NY 14760 i2 UAL PLANS HISTORIC AINCRAFI QUAY BARBER MODELS 2710$ Botternot Rdse AU LOTS $12995Norih 0/meted 00044070 kit prices plus shipping 2161 7776172 credit card Welcome OHIO residents add 1% tax tiCs ooeNeCN"0 Iek u v S 5 1S. TOIE C&T SHOESTRING c1u60 902 aTROi io tas WEIGHT Ery/ouss/sO CONSTRUCTION llTIi DilAWflIGS & DATA FOR FORiRiLL 120 PYLON SPORT OR STANDOFF SCALE RADIO CONTROL SHORT KITS FOR THE SPORT MODELER BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LINE DESIGNED BY THE PROFESSIONAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WING AND TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND FUN TO FLY VISIT OUR OUTLET STORE AT IS MORGAN STREET IN CRYSTAL LAKE IL Phone 815/459-0417 THESE TWINS WERE DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT IS HARD TO BEAT THEY HAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE P-38 LIGHTNING 70 SPAN . 7495 FOR 25 TO 50 ENGINES A-26 INVADER 68 SPAN . 6495 8%iWG MEG MORE SINGLE ENGINE FIGHTERS FOR 25 TO 50 ENGINES AGM2 ZERO 54 SPAN3750 F-AD TOMAHAWK 55 SPAN3750 P-39 AIRACOBRA 55 SPAN3750 F-SlD MUSTANG 54 SPAN3750 C202 FOLGORE 56 SPAN3750 FOCKE WULF 90 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIREWALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD 5750 TO WING MFG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND 5350 FOR PRODUCTS CATALOG native Mississippian active modeling since late 1940s retired Navy officer lives 900 Main Ave La Grande OR 97850 recently published article Chip Net Safety Baffler August 1987 Model Aviation Support/Palko Continued page 59 member people neigh bors friends like support Tell something need want Tell something dont like Speak up always bear mind much have done try express criticisms sug gestions diplomatically can FF Nats/Murphy Continued page 63 fectly constructed logged six maxes top Bob Dunhams Motovator gale force such saw least two flights model went up slight left pattern rather desired righthand groove Catons well-adjusted Hbird seemed impervious distortions its power pattern airplane must un doubtedly regarded finest AMA class model contest Although AMA Gas classes av eraged between 35-40 entries per event Open D Gas drew respectable 17 contend ers pair Texans down Al amo way would carry home top hard ware baffle big uns Lee Camp bell quipped earlier hed like see Nit Wit win Pearl coming sec ond score could simply read Nit Pearl two outcome instead Pearl Pearl two Marvin Maces Pilfered Pearl bested teammate Jim Summersetts similar design mere sev en seconds Third-place winner Bill Dunlops carbon fiber Ex-Cels went OOS out of-sight fourth max Seelig de thermalizer timer failed function model spotted next day air 20 miles north across Wabash River Indiana average Gas flier AMA class events appeared relatively less scien tific Rubber power counterpart regard use exotic thermal detection devices fiberglass pole adorned lar tape served Gas fliers standard di vining rod seemed satisfied keeping eye some other fellows pole other guy always tal ler pole located better posi tion anyway contrast gumband gang came well equipped deci mal-reading Haverhill digital thermometerson-a-stick accompanied assorted ver sions bubble machine contraption rang ing totally commercial custom-made origin something mystery bubble machines could deliver observable thermal detection ground winds streaking along horizontal paths seldom higher 10 ft off turf case often good air above ground gusts boom ers prevalent weekend long Fred Blom captured coveted Wake field trophy Ed Konefes Martin Richardson close behind popular P-30 event saw Frank Heeb eking out onesecond win over relative newcomer Bill Jackson obviously learning fast get maximum energy out rubberband First third places four seconds apart event longtime rubberband expert Gawg Perryman log ging four-second deficit third place Completing first days event card A-i Towline 020 Cargo Bill Schlarb took A-i Towline going away max-out-plus model flown Cargo belonging Robert Nich ols bucked wind lifting respectable 45 oz Nichols Cox 020 must surely suf fering hernia problem after feat No report Free Flight session com plete unless preceded account weather case Saturdays weather however can brief Conditions second day competition ex act replica Fridays sunny windy Ed Kecks model designed Brad Bane well named Windwhip attacked wayward gusts admira ble consistency Keck turned six maxes Charles Caton pulled up 7 sec short 13 sec ahead veteran Sal Taibis Starduster 900 Sal lone Cali fornia entrant motored across US once again seemingly ageless 56 Chevy will have turned over 600000 miles its speedometer trek home 49th consecutive Natsdisre garding course World War II years Nats held Thats some attendance record Keith Fulmer took V3A second year row though thought saw him dork model process Nat Comforts Max Hog missed third max 3 sec puffing him second slot James Thoruberry pulled tugged A-2 Towline first place FlA saw Andrew Barron stumbling around corn stubble field couple times attempting circle tow model occurred time could have moved about 30 ft left onto grass strip lined run way less hazardous situationbut maybe thermals concentrated over corn stubble Oh well what know Anyway Andy chugged third place hind Tennessee dance man 0 C Stewart Coupe dHiver Lawrenceville resi dent Bud Brown led scant six seconds over omnipresent Gawg Perryman George once heard say powers Gas jobs A-in Pirelli Roger Wathen Indianapolis brought down vanload youngsters participate February 1989 165 I-fl FOR 40 TO 60 ENGINE
Edition: Model Aviation - 1989/02
Page Numbers: 52, 53, 54, 55, 56, 164, 165
THEYRE EASY AND FAST make theyll add very little weight airplane Since skis impart degree stability model wheels may find did reduce ground looping tendency takeoff landing plywood skis lighter metal ones have seen also use knee action positioning system closer full-scale torque rod system article describes procedures making ski Double parts making main gear set making nose gear length width measurements will have modified Suggested full-size templates parts included Construction Cut ski blank shown photo sheet A-in thick birch model aircraft plywood Lite Ply door covering making main gear ski 40- 60-size ship appropriate size would order 2 wide 12 long Round point nose liking round sides edges Straight sides sharp edges give ski its good tracking properties Make mold press piece 2 x 4 approximately 18 long Draw two parallel lines extending lengthwise 34 in from top bottom edges Trace 4-in radius arc lower horizontal line upper intersecting about Carefully cut along line band saw separate two pieces leaving slightly exaggerated profile ski see photo Temporarily insert few small A-in scrap plywood spacers along cut line represent thickness ski blank will inserted shaping Clamp two pieces back together drill %-in hole edge-to-edge about 1 forward tip radius arc front end Measuring front end radius arc curve drill another %-in hole exactly length ski blank rear bolt will go through Top Authors 66-in-span 11-lb Big Firecat trucks low approach flaps down skis set light touch down Above Left Shown wood parts skI Gussets 1/a-In-sq spruce balsa shown full-size parts layout Above Right Band saw cut line shown heavy black 18-in-iong 2 x 4 mold Rear bolt stops blank sliding rearward during clamping 52 Model Aviation Left After marking centerline pivot point axle marked about 40% forward trailing edge 12-in ski 5 rear works well Right wood parts assembled except keel Note gentle graceful curve upward skis dont have pug-nosed hole will act stop prevent blank slipping rearward clamp mold Insert 41h-in-long 5A6-indiameter carriage bolt washers end hole tighten nuts mold finished youre ready form ski Note 3A-in hole 546-in bolt intentionally sloppy fit reasons will clear later Bring pan water rapid boil kitchen stove thrust front four inches ski blank three minutes shown photo Have mold ready three minutes up immediately position ski mold rear ski just touches rear bolt Quickly tighten down both bolts ski blank forced curve mold see photo Remember ski will relax spring back bit take out mold bit overcurve excess tension necessary mold Allow dry several hours front fireplace overnight shop Make second ski exactly same way preferably same piece plywood making set trike gear ship shorten narrow dimensions nose gear ski Seven inches long inch-and-a-half wide works well 40- 60-size airplane Mold using method described above same mold can drill second hole rear stop bolt like Cut spine doubler parts again using A-in ply Dont sand anything yet ski will look better sand after parts glued together Mark centerlines top bottom three skis main skis put mark 5 rear will serve locator point axle shaft see photo find point Left fully assembled ski keel glued bottom keel position approximate should generally rear Right hole axle bushing being drilled through diamond-shaped doubler Use care get hole absolutely square February 1989 53 Left Make sure immerse least four inches birch plywood ski blank rapidly boiling water three minutes make pliable Right Clamp ski blank shaped mold let dry thoroughly Preferably should allow overnight photos Ed Barton Left Axle bushing being pressed spine Note use scrap plywood prevent jaw pliers damaging doubler Right Marking intersection landing gear wire %2-in anchor point see text alternate method Wire bends easily annealed first Left Wrap joint bright copper wire solder using hot heavy iron Silver solder 90% tin 4% silver sold hardware stores works well must use flux Right Final assembly showing cable spring attachments Seal paint skis before attaching cables nose gear ski lay flat surface such workbench kitchen counter view side ground level Mark point ski just begins curve up away surface axle point should exactly halfway between point rear edge ski Using slow-setting epoxy carefully glue spines /8-in-sq balsa spruce gussets onto three skis Soft spruce best hard balsa will work nearly well omit gussets add great deal strength handle side loads may necessary sand little curve bottom edge nose gear ski spine make match ski profile certain epoxy sets axle locations remain exactly above respective marks skis spines remain straight respect centerlines dry epoxy diamondshaped doublers spines shown Round front rear ends keels sandpaper epoxy along bottom centerlines skis see photos After determining diameter axle shafts use drill press drill hole 1/16 larger figure through exact center doublers ski Make sure hole square possible relation ski see photo Cut %-in-long piece brass tubing outside diameter same size drill gently tap press hole form bushing see photo Drill /16 hole end spine shown youre ready sand finish ski Sand enough remove fuzz splinters dont overdo Again round bottom edges skisas full-size skis sharper better track snow However neatly rounded edge spine doublers will make nicer looking ski Attaching skis type landing gear ship will determine what kind anchor points will need plane has wire gear legs follow paragraph has dural aluminum gear go paragraph B Whether landing gear legs airplane emerge wing fuselage step basically same Bend small hook about A-in diameter end piece %2-in music wire easiest way to anneal first heating cherry-red propane torch flame letting cool slowly Using wire bending gadgets available will also help Remove wheel gear leg Holding wire hook will call anchor point now about 2 above axle shaft using permanent marker mark both anchor point gear leg meet see photo Bend end anchor point parallel gear leg cut off about inch beyond bend Rough up file Dremel tool bind solder gear leg hook itself 2 above axle shown photo Ualess using 4-in-dia wheels spacing will allow reattach wheels airplane removing anchor points Repeat procedure exactly other gear leg B plane has dural gear youre luck easier two methods Cut two rounded teardrop54 Model Aviation 1-ULL SIZE PARTS TEMPLATES ALL PARTS OF 1/8-IN BIRCH PLYWOOD UNLESS OTHERWISE NOTED MAIN SKI PATTERN N LONG 00 MAIN SKI SPINE MAIN SKINOSE SKI DOUBLERDOUBLE R NOSE SKI SPINE MAIN SKI KEEL N PLYWOOD NOSE SKI KEEL IN PLYWOOD SECTION THROUGH CENTER OF SKI AT AXLE HOLE NOSE SKI PATTERN IL U V Left Alternate anchor point dural gear Pattern drawn 1A6-in aluminum Right Finished alternate anchor point note 2-in centers Left Here alternate anchor point place Slight outward bend places top hole directly over center spine Right Berklcy Steeion excellent material use cables An S-hook easiest way attach forward end spring spine shaped anchor points A6-thick aluminum shown templates see photo Drill A-in-dia hole small end large end drill hole exactly fit axle threads distance center center two holes should 1 / 2 exact length critical long two pieces identical see photo Remove axle shafts insert threaded ends through larger holes reassemble tightening securely anchor points should inside landing gear oriented straight up axle can bend small angle outward near top anchor points put A-in hole directly over ski center isnt necessary see photo Depending type nose gear ship has may have use little ingenuity installing anchor point spring cable look illustrations should give enough ideas work Most sport aircraft use straight nose gear leg short wire loop anchor point soldered two inches above axle will work fine Finish skis according favorite method keep light used Sherwin-Williams Zelon primer red automotive engine paint epoxy finish such K&B Hobby Poxy would probably better keep bottoms glass-smooth wax good automotive wax before first take out couple times year thereafter Mounting adjusting skis Install both main skis using wheel collars both sides necessary keep binding must swivel freely axles Sunbelters curved end goes front curving up Suspend ship its wing tips eyeball angle about 50 nose-up ski Loop piece steel cable Steelon brand nylon-covered fishing leader great anchor point above axle A6 hole rear end spine have angle set crimp using small lengths brass aluminum tubing shown photo sets angle-of-attack ski gentle finger pressure rear edge ski should raise its nose beyond angle Duplicate angle exactly other main ski have dural gear happen get aligmnent off hair can just loosen axle rotate anchor point bit final step youll need find couple identical wire springsapproxi mately 3A6-in dia couple inches long will local hardware store should have assortment junk box doesnt really impatient couple #64 rubberbands will work Err side making springs rubberbands too weak rather too strong make too strong could exert enough leverage nose over lightweight tail-dragger Install springs anchor point above axle front end spine After doing test knee-action skis pressing down front end finger should give easily spring quickly back original position released Make sure tight pulling down couple inches letting go anchor points loose cheated using smaller wire youll find out specified %2-in wire paragraph anything smaller will bend out shape under leverage would ordinarily no problem except two skis return fairly close identical nose-up position will find asymmetrical flight load skisa situation sufficient set heart popping like pacemaker microwave cook-off until get bird ground again tip arrive field set model car hood tailgate several minutes before put down snow set warm skis directly snow will melt little freeze chunks snow ice sticking bottoms Its easy tell youve done takes full power taxi out after snow has disappeared youll find can still fly skis until grass greens up Just sure stay grass similarly cushioned surface Asphalt other hard-surface runways eat up keels first 20 ft ugly things nice Continued page 164 56 Model Aviation everyone seemed have great time special thanks workers made such great race missed missed good always next year TOP 10 FINISHERS NMPRA 0500 Championship Race P1 Racer 1 AlIen 2 Bartle 3 Gates 4 Benezra 5 Eide 6 Johnson 7 Greer 8 Klien 9 Demay 10 Cranfill Plane V-Tail UT-Tail Scat Oat V-Tail 0500 0500 Q500 0500 Q500 Q500 Ricky Eng R R R w R R R R R R Best PtTime 3012141 2811993 2512208 2411956 2312172 2212752 2112101 2012770 1912073 1913064 Engines R i W a know lot things use build models can very toxic very careful handling few things Im sure miss Methyl alcohol thing us use cleaning up engines wiping down plane ore painting cheap some us probably overuse long ago received letter Joe Sulli van Ja-Lea Co Dallas TX Joe brought attention following very interesting informa tion methyl alcohol will skip over de scription go toxicology Methyl alcohol possesses distinct narcotic prop erties also slight irritant mucous membranes Its main toxic effect exerted upon nervous system particularly optic nerves possibly retinae effect upon eyes has attributed optic neuritis sub sides followed atrophy optic nerve Once absorbed methyl alcohol very slowly eliminated Coma resulting massive exposures may last long two four days human body products formed its oxi dation formaldehyde formic acid both toxic Because slowness elimi nated methyl alcohol should regarded cu mulative poison Though single exposures fumes may cause no harmful effect daily expo sure may result accumulation sufficient methyl alcohol body cause illness Severe exposures may cause dizziness uncon sciousness sighing respiration cardiac depres sionand eventually death Stock too Im.dists Shipment zEIVDAH 0-42 37 cu In $24995 New Onedro 40 coi 13bering epine starter $15895 Reg Qoedre 40 *12216 Brieghelle flywheel 96 Reg Qoede 40 Power Aeeenbiy Only points $6895 QUADRA orZENOAH REPAIR $1000 pine panel Jim Meeser ERCOUPE PLANS $2395 FULL-KIT $23995 Jim Mono TOMAHAWK PLANS $2396 FULL-KIT $23995 Jim Meeser J3 KTTSN PLANS $2996 FIJLLKI1 $21995 510 KADET SENIOR KIT $4796 Ineve $20001 SIG KADET SENIORITA KIT $3495 note $15003 ZENOAN G-22 96 ZENOAN 0-38 $15995 FLOATS 48114 noel core $2195 complete kit $4796 10 WWl WHEELS 6 P1K Spring Stertor $2495 PLANS SUPER STEARMAN 114 lliodfreyl $2896 1I3TAYLORCRAFTor1/3CIJS Nelitn $2996 VOLKOPLANE 1/3 Chicken Cherliel $2395 Servo H4$2 42 no $1296 WoId 5-16 Irge models $4495 Poop elI noon ER TOP PUT OYNATHRUST 20% OFF U S Onedro FUEL TANKS16 32 $596 FIBERGLASSARROWSHAFTS 5/16 o32 long $for$11 95 24 Hoor Sow/so 9250 pontoon Senk Check ore o JIM MESSERS QUALITY MODEL PRODUCTS Valley Wow Dr Box 43 Allegany NY 14706 exposure less severe first symptoms may blurring vision photopho bia conjunctivitis followed develop ment definite eye lesions may head ache gastrointestinal disturbances dizziness feeling intoxication visual symp toms may clear temporarily recur later progress actual blindness Irritation mucous membranes throat respiratory tract peripheral neuritis occasionally symptoms referable other lesions ner vous system have reported skin may come dry cracked due solvent action methyl alcohol guess cant too careful think will pay little attention what chemicals use hobby lot new rules proposals up vote district Contest Board members Let people know feel Yes can fluence job support what AMA member wantnot just what feel Communicate Editors note Next month s Competition Newsletter should list rules proposals have survived Initial Vote Contest Boards last vote boards must make before rules proposals become accepted 1990/91 Final Vote votes deadline May 1 want influence district Contest Board member II have before RMcM next issue See races Skis/Hicks Continued page 56 smooth ski bottoms field runway surface synthetic mesh material paper mill dryer belt 11-lb sport ship skis lifts off surface though wheels couple flights seem have done no damage skis make up ski mold yourself pass around buddies Youll find couple evenings spent little project will very rewarding get up nerve touch-and-go local bayou things sure let know might come up whole new contest event About author Graham Hicks Build THORP T18 low-cost foam/wood materials Send $200 latest airplanes plans list Dozens available uts R/C FREE Foam Sources Foam Cutters Ni-Chrome Hard Shell Finishes Giant Foam Wings R/C Skydiver Etc FOAM SCALE MODELS Box 662MA-1 St Croix Falls WI 54024 164 Model Aviation CA MASK CA glue works wonders building models right Unfortunately gives ott enough fumes knock vulture off carcass modelers have suffered medical problems after inhaling CA fumes take chances special vapor respirator filters CA fumes soft face mask adjustable straps comfortably fits face sizes easy breathing valve allows prolonged use providing dependable filtering concentrations up 1000 PPM though rugged industrial mask light weight elimi nate fatigue Dont get gassed CA Get protected Order CA Mask today Just $1247 shipping cheaper hospital visit Money order Master Charge Visa include expiration date check allow 20 days clear Sorry no CODs Pelwan Enterprises 2540 RIDGE ROAD LANSING ILLINOIS 60438 Phone 895-8151 6B 1/5 AEBONCA L16B INe SPAN 2 OR 4 CYCLE60 80 TGfl FEATURED IN MAY 87 SCAlE R/C NOD 1/6 RYAN Ml MAJIPIAIE 72 IN SPAN 2 OR 4 CYClE e60 80 ENCfl FATHER OF THE SPISIT OF ST S 1/4 AERONCA L3 105 IN SPAN 2 OR 4 CYCLE90 15 EBGINFS UeSAeAFe W1II GRASSHOPPER 1/4 DRUISE TURDUIIT 65 IN SPAN 2 OR 4 CYCLE e60 80 tGflIE5 THE MT FAItOUS OF HOMEBUILTS ROLLED PLAN SE & MANUAL $2500 SHPING PREPA NY S TAX FISERGIASS COIlS NEEDED FOR AERONCA L16B & L3--FROM FISERGIASS MASTER AERO PLANS N PARTS PO BOX 939 N NY 14760 i2 UAL PLANS HISTORIC AINCRAFI QUAY BARBER MODELS 2710$ Botternot Rdse AU LOTS $12995Norih 0/meted 00044070 kit prices plus shipping 2161 7776172 credit card Welcome OHIO residents add 1% tax tiCs ooeNeCN"0 Iek u v S 5 1S. TOIE C&T SHOESTRING c1u60 902 aTROi io tas WEIGHT Ery/ouss/sO CONSTRUCTION llTIi DilAWflIGS & DATA FOR FORiRiLL 120 PYLON SPORT OR STANDOFF SCALE RADIO CONTROL SHORT KITS FOR THE SPORT MODELER BY POPULAR REQUEST WE HAVE ADDED THE CORSAIR TO OUR SHORT KIT LINE DESIGNED BY THE PROFESSIONAL R/C BUILDER AND FLIER LEMAR ALEXANDER THE CORSAIR IS BUILT AROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION IT IS VERY STABLE IN FLIGHT WITH NO TIP STALL HABITS THE CORSAIR HAS PLENTY OF WING AND TAIL AREA FOR THOSE SMOOTH FLARE OUT LANDINGS THE IDEA BEHIND OUR SHORT KIT LINE IS TO OFFER INEXPENSIVE WAY FOR MODELERS TO STEP UP INTO GOOD LOOKING SCALE WAR BIRD THAT IS EASY TO BUILD AND FUN TO FLY VISIT OUR OUTLET STORE AT IS MORGAN STREET IN CRYSTAL LAKE IL Phone 815/459-0417 THESE TWINS WERE DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT IS HARD TO BEAT THEY HAVE OUTSTANDING FLIGHT PERFORMANCE THROUGHOUT THE ENTIRE SPEED RANGE P-38 LIGHTNING 70 SPAN . 7495 FOR 25 TO 50 ENGINES A-26 INVADER 68 SPAN . 6495 8%iWG MEG MORE SINGLE ENGINE FIGHTERS FOR 25 TO 50 ENGINES AGM2 ZERO 54 SPAN3750 F-AD TOMAHAWK 55 SPAN3750 P-39 AIRACOBRA 55 SPAN3750 F-SlD MUSTANG 54 SPAN3750 C202 FOLGORE 56 SPAN3750 FOCKE WULF 90 54 SPAN3750 SHORT KITS INCLUDE STYROFOAM WING CORES CANOPIES COWLS PLANS ENGINE MOUNTS FIREWALLS MOLDED MISC PARTS SOME HARDWARE AND MATERIALS LIST FOR BALSA AND ADDITIONAL OFF THE SHELF ITEMS NEEDED ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS $450 PER KIT CANADIANS ADD 5750 TO WING MFG PO BOX 33 CRYSTAL LAKE IL 60014 ILLINOIS RESIDENTS ADD 6% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND 5350 FOR PRODUCTS CATALOG native Mississippian active modeling since late 1940s retired Navy officer lives 900 Main Ave La Grande OR 97850 recently published article Chip Net Safety Baffler August 1987 Model Aviation Support/Palko Continued page 59 member people neigh bors friends like support Tell something need want Tell something dont like Speak up always bear mind much have done try express criticisms sug gestions diplomatically can FF Nats/Murphy Continued page 63 fectly constructed logged six maxes top Bob Dunhams Motovator gale force such saw least two flights model went up slight left pattern rather desired righthand groove Catons well-adjusted Hbird seemed impervious distortions its power pattern airplane must un doubtedly regarded finest AMA class model contest Although AMA Gas classes av eraged between 35-40 entries per event Open D Gas drew respectable 17 contend ers pair Texans down Al amo way would carry home top hard ware baffle big uns Lee Camp bell quipped earlier hed like see Nit Wit win Pearl coming sec ond score could simply read Nit Pearl two outcome instead Pearl Pearl two Marvin Maces Pilfered Pearl bested teammate Jim Summersetts similar design mere sev en seconds Third-place winner Bill Dunlops carbon fiber Ex-Cels went OOS out of-sight fourth max Seelig de thermalizer timer failed function model spotted next day air 20 miles north across Wabash River Indiana average Gas flier AMA class events appeared relatively less scien tific Rubber power counterpart regard use exotic thermal detection devices fiberglass pole adorned lar tape served Gas fliers standard di vining rod seemed satisfied keeping eye some other fellows pole other guy always tal ler pole located better posi tion anyway contrast gumband gang came well equipped deci mal-reading Haverhill digital thermometerson-a-stick accompanied assorted ver sions bubble machine contraption rang ing totally commercial custom-made origin something mystery bubble machines could deliver observable thermal detection ground winds streaking along horizontal paths seldom higher 10 ft off turf case often good air above ground gusts boom ers prevalent weekend long Fred Blom captured coveted Wake field trophy Ed Konefes Martin Richardson close behind popular P-30 event saw Frank Heeb eking out onesecond win over relative newcomer Bill Jackson obviously learning fast get maximum energy out rubberband First third places four seconds apart event longtime rubberband expert Gawg Perryman log ging four-second deficit third place Completing first days event card A-i Towline 020 Cargo Bill Schlarb took A-i Towline going away max-out-plus model flown Cargo belonging Robert Nich ols bucked wind lifting respectable 45 oz Nichols Cox 020 must surely suf fering hernia problem after feat No report Free Flight session com plete unless preceded account weather case Saturdays weather however can brief Conditions second day competition ex act replica Fridays sunny windy Ed Kecks model designed Brad Bane well named Windwhip attacked wayward gusts admira ble consistency Keck turned six maxes Charles Caton pulled up 7 sec short 13 sec ahead veteran Sal Taibis Starduster 900 Sal lone Cali fornia entrant motored across US once again seemingly ageless 56 Chevy will have turned over 600000 miles its speedometer trek home 49th consecutive Natsdisre garding course World War II years Nats held Thats some attendance record Keith Fulmer took V3A second year row though thought saw him dork model process Nat Comforts Max Hog missed third max 3 sec puffing him second slot James Thoruberry pulled tugged A-2 Towline first place FlA saw Andrew Barron stumbling around corn stubble field couple times attempting circle tow model occurred time could have moved about 30 ft left onto grass strip lined run way less hazardous situationbut maybe thermals concentrated over corn stubble Oh well what know Anyway Andy chugged third place hind Tennessee dance man 0 C Stewart Coupe dHiver Lawrenceville resi dent Bud Brown led scant six seconds over omnipresent Gawg Perryman George once heard say powers Gas jobs A-in Pirelli Roger Wathen Indianapolis brought down vanload youngsters participate February 1989 165 I-fl FOR 40 TO 60 ENGINE