RAT RACING has evolved good beginners event probably competitive control-line event its 20 some years existence old days form aircraft acceptable long would take off land winner usually could successfully restart engine couple times race things have changed recent years state-of-the-art has up graded both through technological im provements engines also flying techniques improvements have proven demise event Participation especially new people practically non-existent feel lack participation new blood directly attributable two areas lack available information lack pilots intent article make available potential new comer details get started event Hooptee MK III Model presented article typical modern rat racers represents third basic design change have made rat racer designs past 12 years have using design three years has such consistent performer other top competitors Midwest area now using also include Bill Allen John Ballard Gary Fentress Bob Finely Pat Flinn quite easy construct once have gone through exercise time two first time through may scare bit due un usual construction technique namely fiberglass top future models will become quite easy confidence improves HOOPTE*B MKIIL updde c ro racing John F Kilsdonk first step select engine As writing HP-40 RRV engine popular However enough work being put OS-405R some day should least rank equal better HP Other 40-size engines avail able however passes both qualities absolutely necessary good rat engine high performance fast re start capability Whatever engine select start should fitted Midwest former ly Harters pinto speed pan can obtained through good hobby shop pan will require some grinding mount engine modifications pan should kept minimum structually weaken engine mounted using 4-40 X s requires drilling tapping pan after locating engine next step install landing gear single wheel landing gear shown plans has proven very popular because its ease installation extreme durability An 1/8 hole drilled through inboard side dimple location pan Another /8 hole drilled approximately 1 rear wing mounting boss pan Select 15 18 length of/g piano wire make two right angle bends same plane approximately middle piece center distance bends should correspond exactly center distance two landing gear holes Both holes drilled pan should radiused top accept radius piano wire bends Slip piano wire through two holes lightly tap place until well seated point Above Basic components prior assembly Below Finished wing engine/pen assembly fiberglass fuselage top has cut out match engine wing Leadout tubes covered basswood strips wing tip weight place its special cut-Out 28 Model Aviation take rearward wire bend forward close pan possible make another bend parallel right against back front wire Take length rass tubing gently flatten ID cross-section vise Slip over two pieces piano wire lightly tap position Mark rear wire bottom edge brass tubing Remove tubing cut-off rear wire mark Reinstall tubing bend whole assembly forward wheel axle will approximately 2 inches front front wire exits pan Measure engine mounting surface pan down 4 inches loca tion wheel axle Bend forward /8 piano wire inboard side 900 angle parallel future wing centerline Install l/8 Dons wheel soldering No 4 flat washer both sides trim off excess wire use wheel collars hold wheel tend vibrate loose Next step install fuel shut-off pan located directly behind engine Leave enough clearance fuel lines pass through use W-K shut-off find sim plest effective using shut-off may find can get closer engine notching out extra fuel line clearance Next install fuel tank Either Dons 4 oz rat tank W-K rat tank will work very well Personally use combination both tanks cut off front section Dons tank solder W-K tank gives about apacity 4 oz tank adequate 60-70 laps engines However security pre fer extra apacity fuel tank should securely mounted pan using 020 brass angle brackets soldered both front rear tank held place 4-40 bolts through pan tail skid necessary although will save some wear tear lot top competitors use however prefer use 3/32 piano wire version formed bolt pan preceding steps should complete pan installation except two items prefer round off front end pan conform contour shown plans very simple utilizing disk sander l motor top wing assembly stabilizer assembly bolted pan will done later wing material should selected light basswood select ponderosa pine pinch have used board shipping crate wood should planed sanded 5/16 thickness 5/16 X 4 X 28 blank required Cut out plan form wing configu rapid advances Rat Racing discourage newcomers state-of-the-art article presents valuable unpublicized information ration shown plans leadout tube grooves can cut using little care X-acto gouge easy way use router bought Sears standard router about $3000 sure saves time gives much cleaner finished product using hand gouge grooves need /8 wide /8 deep use router cut grooves 5/32 deep using 1/8 dia blade mill 1/32 X groove top allows 1/32 X wood cap available model railroad supply stores Whichever tube installation method used /8 aluminum tubes should held place small amount fiberglass polyester resin basswood caps installed using same material caps used fill balance grooves plastic balsa surfacing resin mixed micro-balloons outboard wing weight must consistent performance especially windy days Gougeor use routera pocket /8 deep X 1 long X shown near outboard wing tip filled lead solder either two ways can hammer length bar solder /8 thickness cut out piece fit pocket can melting solder dripping pocket Drill about January 1976 29 Wing assembled fiberglass topnote fillets wing joint Engine fuel tank mounted pan Either Dons 4-oz rat tank W-K rat tank work equally wellusually 60-70 laps Complete assembly prior painting Note fuel shut-off just rear needle valve An alter nate top construction shown plan Balsa basswood just take time IIOOPTEE MIcII 0CONTROLEE RAT RACER DeIg9d dDrorw hj Jaw KLSDOAW 0 e BASS WOOD BALSA 7~ MACHINED RECESS ALUMINUM TUBING V32I/4 BASSWOOD LEADOUT DETAILS 4 —X-recrZt~N~t REINFORCE COWL WITH FIBREGLASS ALTERNATE TOP CONSTRUCTION I/35 LEADOUTS LB ALUM TUBING IMBEDDED IN BOTTOM OF WINGVtB32111/2BOLTS .............................. ][b-1-10-1-10]] -iIIit IOPTIONAL FILLETS BASSWOOO-WING YOUR AMA NUMBER IREQO 012345B Inches S BELLCRANK W-K Ho091eMOLOED FIBREGLASS TOP B-32 I-I/V BOLT ID BRASS TUBING SLEEVE ITYP V16 PIANO WIRE WING TIP SJ B B OPEN - ----E3 CLOSED V FABRICATE CONTROL I4ORN FROM VIB PIANO WIRE WRAP WITH SOFT WIRE ANO SOLDER REL S4UT-OFF DETAIL ilNx -N 3/4 OZ COOLING OIJTLET\1/4OS 4OSR OR EQUIVI COOLING BlAT 77/VDIANETER BANTELS PROP OR EGUlVJ MIDWEST PROTO PAN s 6i/4 c 7-\I1 WIRE L G WITH I/BPIANOI5/B DONS WHEEL -FLATTENED V410 BRASS TUBING SLEEVE THREADED H NGES Ca 0 Hooptee MK III six eight holes through weight cross-wise wood about 1/8 deep Remove weight apply generous amount resin pocket Reinstall weight clamp position resin will ooze out holes provide good mechanical bond can also covered patch fiberglass cloth reinforcement resin has set up use sanding block sand both leadout tube area wing weight area bring back perfectly flat plane Turn wing over carve airfoil using small block plane Take time step gouge wood leaving scar cannot sanded out airfoil should conform crosssections shown plans Finish up various grits sandpaper ending up about 200 grit Now part thats probably got scared the upper fuselage top can purchased W-K Hobbies actually quite easy work So dont panic Calmly take top po sition next pan engine sembly Mark off approximate posi tion glow plug engine Drill eter hole position Now carefully file use Dremel tool gradually increase diameter hole until about /8 diameter smaller cylinder head Place top over engine pan occasionally check ing location Now mark off cut-outs engine lugs shut off cut out appropriate notches Now slowly continue open up cylinder head hole until fits exactly way want try use about 1/32 clearance around head Now mark off cut out exhaust opening cooling vent inlet outlet shown plans Locate position wing leading edge top scribe lines e bottom top leading edge location rearward 4 Make paper template wing cross-section center chord position Scribe form both sides fiber glass top using flat scribed lines leading edge locaters Now drill /s hole somewhere near center begin file use Dremel cut openings scribed lines get close try insert wing keep reworking openings until wing will just slip position Now go back wing Take 2 Veco now & L bellcrank bend leadout tabs down 300 angle Using gouge router cut appropriate grooves allow bellcrank swing through 600 arc Drill 9/64 hole through wing bellcrank bolt insert 6-32 blind nut through top Above Top view model after three years flyingnote thread-sewn hinges Right Pushrod belicrank detailnote alligator clip finger contact Bottom Wing tip skid installa donnecessary one-wheel main gear Prop fiberglass fuel 50 70% nitromethane wing epoxy place Remove bellcrank slip wing back position Extreme care must taken assure wing parallel bottom top perpendicular fuselage centerline exact fore aft position shown plans 2/s engine cylinder center Now use 5-minute epoxy glue wing position nerves havent failed now youre set An alternate top construction also shown plan care old fashioned way balsa bass wood construction just functional takes time stabilizer should quite straight forward Use good quality basswood use plywood stab carved same way wing should have flat-bottom airfoil shown prefer home-made control horn shown plans can sub stitute commercial Veco & L other version horn shown plans can easily fabricated using 1/16 piano wire vise little care stab mounted pan using 4-40 X s through bottom pan 4-40 blind nuts through top stab stab should hinged until after painting although prefer drill hinge thread holes prior painting desire good quality RC nylon hinges can substituted thread version Provide hole fiberglass top fuel tank fill cut out slots ihe continued page 79 January 1976 31 new LEADER 500 class sport pylon racing & fun flys FEATURES _____MACHINED BALSA PARTS _____COMPLETE HARDWARE PAC FULL SIZE PLANS AL LANDING GEAR THEPRE-LAM BITSFUSE SIDES CONSTRUCTION PHOTOS mASSY INSTRUCTIONS 0c 3995ius postage dealer inquiries invited ri i5MADISON LJJest PH 602275-8653 Throughout past Contest season have received fine pictures over country Modelers coming up some really outstanding scale models think Stand off Scale has shot arm stimulate imagination modeler wants bird look like full-size aircraft such model J F Alexanders Abilene Texas P-38-the forked-tail devil Japanese WW II called P-38 very distinctive model flying easily recog nizable J Es P-38 unique hand made molds its fiberglass also hand-made own retracts things tires pride joy have seen fine P-38 fly real tribute P-38 Lightning WW II fame Jerry Farr Abilene responsible fine picture sent Bob Strobel Detroit Mich sent very unusual picture ME 262 WW II Ger man jet fighter Bob reports 262 flies fast stable ST 60 all-wood construc tion light 75 lbs Im sure Stand-off Scale 262 would impressive air have also looked long hard several jet aircraft would really adapt Stand-off Scale nothing rules AMA Stand-off Scale rules forbid jet subjects conven tional powerplants remember several years ago World FAI Scale Champion ship won ME 163 Komet rocket motor-powered flying wing aircraft WW II model powered standard model engine same Bobs 262 So some digging see some early jets would make good scale model Also remember day ducted fan almost reality powering scale models Old friend Dave Platt pioneering type powerplant scale models Till next time keep fine black white pictures coming hope use possible address 734 North 6th St Terrace Blue Springs Mo 64015 Hooptee MK III/Kilsdonk continued page 31 stabilizer top location shown can add fillets around wing joint using either plastic balsa micro-bal loons sanding desired contour should also dam up upper fuselage area above wing using either materials will prevent fuel splashing area Now have locate again top pan drill 7/64 hole through top wing assembly through pan indicated positions front hold-down screws Similarly rear top rear hold-down position After drilling 7/64 holes through pan tap three holes 6-32 tap Enlarge 7/64 holes drilled through top 3/16 cut off lengths 3/16 OD X 5/32 ID brass tubing about 11/4 long tubing pushed through holes top top installed pan Run three 6-32 X 2 bolts through brass tubing thread pan Draw three bolts down tight making sure brass tubing seated against pan Now take masking tape rubber bands securely clamp top pan point brass tubing inserts should extending well above top Apply small amount 5-minute epoxy tube top surface will hold tubing its proper position tape rubber bands removed After epoxy set remove top turn over Additional heavy amounts epoxy should applied inside top securely hold tubing place lay /2 strip heavy fiberglass tape over tubes under wing cement well top additional reinforcement can use either epoxy polyester resin cement tape place securely hold tube rear dam up area about 1/4 front tube modeling clay works great pour mixture micro-bal loons resin sets-up can easily sanded flat remove clay before sanding excess tubing original epoxy top side trimmed off use ted end-mill drill press however counter sink Dremel can also used effectively finish have found easiest durable apply two coats surfacing polyester resin wood surfaces fillets sanding generously after coat Also fiberglass top must sanded lightly remove mold release agent present apply Hobby poxy K&B epoxy usually two coats wet sand 400 wet dry sand paper Apply decals desired finish up coat clear epoxy over everything stab must now hinged re-drill hinge holes remove accu mulated resin paint sew hinge using flying line heavy carpet thread Mount 030 brass hot wire pad cowl connect short length #16 wire run through cowl up through top install mini-al ligator clip forms leg pit battery connection pan grounded engine forms other leg brass plate should located comfortable convenient pit man Install bellcrank leadout wires prefer 1/32 piano wire leadouts ever flexible cable 125# test fine also Use small drop Locktite bellcrank mounting screw prevent coming loose use wing tip skid outboard wing Although entirely necessary like tail skid saves lot wear tear tip skid formed 1/16 piano wire held place using 4-40 bolt blind-mounting nut Actually prefer solder small 020 brass plate utilize two such screws hold place Mount stab using 4-40 x 3/4 January 1976 79 aIF7FA5LAL E WWII SCALE AIRCRAFT PLANS Send $100 Catalogue Containing copy Superscale drawing Superscale Box 201 Arlington Texas 76012 Hooptee MK Ill continued bolts blind mounting nuts run 1/16 pushrod outside hole belicrank control horn stab will have experiment different lengths wire get proper movement like 450 up 300 down controls operating prop erly small pushrod must fabricated trip fuel shut-off Again use short length / 16 piano wire connect ed inside hole belicrank runs through small angle bracket mount ed inside cowl Experiment length until fuel shut-off will trip just prior full down elevator Now mount top pan youre ready test fly prefer fiberglass prop pitched accord ing details plans Use fuel 50% 70% nitromethane good quality lubricant Several new glow plugs now available Preliminary tests have indicated Gb-Bee Fusite Div Emerson Elec has best dura bility should experiment differ ent props fuels glow plugs deter what suits best take-off mandatory maintain neutral elevator until model FULL-SIZE PLANS No 123 4-Bits 40-powered RC Quickie 500 has winning ways Good sport too No 124 Semi-Pro Contest-winning HLglider has pop-up tail dethermalizer No 125 HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Timer No 126 Hooptee MK III John Kilsdonks CL Rat Racer involves latest state-of-the art No 100Hinnants F-5$450 ultimate maneuverability smoothness 60 Pattern job has No101Short Seamew $300 40-powered class carrier model good prototype lends itself innovations No 102French Wench $225 Free Flight classes 1/2A 049 051a fully tested design No 103Kloud King $400 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF No 104Wiley Post Biplane $225 Petite durable scale design either rubber tail wagger pulse rudder No 105Harold Ruarks Sportsman $450 dream RC cabin iob pretty smooth lines 40 powered full-house No 106Vought Kingfisher $450 semi-scale fully stuntable control Line model Len King IFor 25 35 engines No 107Aeronca K $200 24 wingspan ubber Indoor Scale oldtime lightplane Its done 90 seconds No108Electrgc $375 Couldnt done Dick Sarpolus Astro 25 RC job performs pattern No 109Bill Fuoris Quarter Midget $300 Developed House Balsa design modifications faster times No110The Zipper $175 latest CL Scale Racers John Kils donk job isa must racing fans No111MaxA-Million $375 fleet free flights problem good A/B FAI $400 $100 $175 $175 No 1125neat$275 Sport RC glider simple job can flown engine No113Cessna 150 Aerobat$275 Step up Half-A CL jobs 09-powered semi-profile easy build fly No 114Ernie Violetts DH Comet$900 CL Scale 1974 Nuts first-place winner twin flies beautifully No115Niris$400 An RC pattern job takes advan tage best esisting criteria No116Electro-Lite$150 Hal Covers contest-type free flight VTOs Hytork electric motor No117Novice$150 simple beginners A-t Nordic con structed entirely sheet balsa No 118 GollyGeeWhiz$150 Dan Rutherfords simple Half-A powered Combat job turns dime No119 Four Beginners Too$300 basic RC trainer 09 15s rudder elevator motor controls No 120 Cathexis$450 Dave Parsonr FAI FF has auto-elevator rudder prop brake No 121 Gremlin$300 Sturdy aerobatic RC biplane flies well 35s up 60s No122 HotWood$100 Twice Nats winner Rocket allbalsa Jetes-powered job Circle numbers plans wish order 100 101102103 107108 114115 104 105 106 109110111112113 116117118119 121122123 Enclosed $ 124 120 125126 Please print carefully NAME STREET CITY STATE 71 P Price includes first-class postage Send check money order payable Model Aviation AMA 806 Fifteenth St. NW. Washington DC 20005 airborne will find Hooptee built according plans extremely stable flies easily response con trol may appear somewhat sluggish intended way Too often heat race 150 mph pilot will take eyes off model watch pit crew signals glance other model race hell crash plane cause too sensitive control effort help potentialnew fliers get involved rat race following list whereto get specialty items will find items quite available will help immensely getting started have personally dealt sources can honestly recommend also feature good mail order facilities W-K Hobbies 19 N Main Centerville Ohio 45459 513 433-0752 Fiberglass tops rat tanks fiberglass props fuel shut offs wheels other hobby items Aldrich Products Inc PO Box 1426 Mission Tex 78572 512 585-7681 En gine rework fuel glow plugs chrome plating Joes Hobby Centers Inc 7845 Wyo ming Ave Dearborn Mich 48126 313 9336567 Bartels Props Ucon & Klotz Oil premixed fuel Dons products other standard hobby items Fusite Division Emerson Electric Com pany 6000 Fernview Ave Cincinnati Ohio 45212 513731-2020 Gb -Bee Plugs Randys Model Aeronautics 515 Cole man Blvd Mount Pleasant SC 29464 803884-7411 Fuels distributor Dons Products other hobbr Items ADVERTISERS INDEX Ace Radio Control Inc I Andrews Aircraft Model Co 67 AMAPR 75 Bantam Precision Products Inc leveland Model & Supply Co 73 Coverite 73 Du-Bro Products Inc 69 EK-logictrol77 Carl Goldberg Models 3 Grish Brothers 71 G-S Products Corp Intl 70 Harrys Hobbies Inc 78 JR Sales Company 75 Midwest Products Company66 Models West Inc79 Peck-Polymers76 Polks Hobbies74 Rare Birds73 Satellite City71 Sig Mfg Company25 SPSystems68 Sterling Models Inc68 Sullivan Products Inc72 Superscale79 TeleCraft72 VI Products76 Williams Brothers71 World EnginesBack Cover 80 Modet Aviation
Edition: Model Aviation - 1976/01
Page Numbers: 28, 29, 30, 31, 79, 80
RAT RACING has evolved good beginners event probably competitive control-line event its 20 some years existence old days form aircraft acceptable long would take off land winner usually could successfully restart engine couple times race things have changed recent years state-of-the-art has up graded both through technological im provements engines also flying techniques improvements have proven demise event Participation especially new people practically non-existent feel lack participation new blood directly attributable two areas lack available information lack pilots intent article make available potential new comer details get started event Hooptee MK III Model presented article typical modern rat racers represents third basic design change have made rat racer designs past 12 years have using design three years has such consistent performer other top competitors Midwest area now using also include Bill Allen John Ballard Gary Fentress Bob Finely Pat Flinn quite easy construct once have gone through exercise time two first time through may scare bit due un usual construction technique namely fiberglass top future models will become quite easy confidence improves HOOPTE*B MKIIL updde c ro racing John F Kilsdonk first step select engine As writing HP-40 RRV engine popular However enough work being put OS-405R some day should least rank equal better HP Other 40-size engines avail able however passes both qualities absolutely necessary good rat engine high performance fast re start capability Whatever engine select start should fitted Midwest former ly Harters pinto speed pan can obtained through good hobby shop pan will require some grinding mount engine modifications pan should kept minimum structually weaken engine mounted using 4-40 X s requires drilling tapping pan after locating engine next step install landing gear single wheel landing gear shown plans has proven very popular because its ease installation extreme durability An 1/8 hole drilled through inboard side dimple location pan Another /8 hole drilled approximately 1 rear wing mounting boss pan Select 15 18 length of/g piano wire make two right angle bends same plane approximately middle piece center distance bends should correspond exactly center distance two landing gear holes Both holes drilled pan should radiused top accept radius piano wire bends Slip piano wire through two holes lightly tap place until well seated point Above Basic components prior assembly Below Finished wing engine/pen assembly fiberglass fuselage top has cut out match engine wing Leadout tubes covered basswood strips wing tip weight place its special cut-Out 28 Model Aviation take rearward wire bend forward close pan possible make another bend parallel right against back front wire Take length rass tubing gently flatten ID cross-section vise Slip over two pieces piano wire lightly tap position Mark rear wire bottom edge brass tubing Remove tubing cut-off rear wire mark Reinstall tubing bend whole assembly forward wheel axle will approximately 2 inches front front wire exits pan Measure engine mounting surface pan down 4 inches loca tion wheel axle Bend forward /8 piano wire inboard side 900 angle parallel future wing centerline Install l/8 Dons wheel soldering No 4 flat washer both sides trim off excess wire use wheel collars hold wheel tend vibrate loose Next step install fuel shut-off pan located directly behind engine Leave enough clearance fuel lines pass through use W-K shut-off find sim plest effective using shut-off may find can get closer engine notching out extra fuel line clearance Next install fuel tank Either Dons 4 oz rat tank W-K rat tank will work very well Personally use combination both tanks cut off front section Dons tank solder W-K tank gives about apacity 4 oz tank adequate 60-70 laps engines However security pre fer extra apacity fuel tank should securely mounted pan using 020 brass angle brackets soldered both front rear tank held place 4-40 bolts through pan tail skid necessary although will save some wear tear lot top competitors use however prefer use 3/32 piano wire version formed bolt pan preceding steps should complete pan installation except two items prefer round off front end pan conform contour shown plans very simple utilizing disk sander l motor top wing assembly stabilizer assembly bolted pan will done later wing material should selected light basswood select ponderosa pine pinch have used board shipping crate wood should planed sanded 5/16 thickness 5/16 X 4 X 28 blank required Cut out plan form wing configu rapid advances Rat Racing discourage newcomers state-of-the-art article presents valuable unpublicized information ration shown plans leadout tube grooves can cut using little care X-acto gouge easy way use router bought Sears standard router about $3000 sure saves time gives much cleaner finished product using hand gouge grooves need /8 wide /8 deep use router cut grooves 5/32 deep using 1/8 dia blade mill 1/32 X groove top allows 1/32 X wood cap available model railroad supply stores Whichever tube installation method used /8 aluminum tubes should held place small amount fiberglass polyester resin basswood caps installed using same material caps used fill balance grooves plastic balsa surfacing resin mixed micro-balloons outboard wing weight must consistent performance especially windy days Gougeor use routera pocket /8 deep X 1 long X shown near outboard wing tip filled lead solder either two ways can hammer length bar solder /8 thickness cut out piece fit pocket can melting solder dripping pocket Drill about January 1976 29 Wing assembled fiberglass topnote fillets wing joint Engine fuel tank mounted pan Either Dons 4-oz rat tank W-K rat tank work equally wellusually 60-70 laps Complete assembly prior painting Note fuel shut-off just rear needle valve An alter nate top construction shown plan Balsa basswood just take time IIOOPTEE MIcII 0CONTROLEE RAT RACER DeIg9d dDrorw hj Jaw KLSDOAW 0 e BASS WOOD BALSA 7~ MACHINED RECESS ALUMINUM TUBING V32I/4 BASSWOOD LEADOUT DETAILS 4 —X-recrZt~N~t REINFORCE COWL WITH FIBREGLASS ALTERNATE TOP CONSTRUCTION I/35 LEADOUTS LB ALUM TUBING IMBEDDED IN BOTTOM OF WINGVtB32111/2BOLTS .............................. ][b-1-10-1-10]] -iIIit IOPTIONAL FILLETS BASSWOOO-WING YOUR AMA NUMBER IREQO 012345B Inches S BELLCRANK W-K Ho091eMOLOED FIBREGLASS TOP B-32 I-I/V BOLT ID BRASS TUBING SLEEVE ITYP V16 PIANO WIRE WING TIP SJ B B OPEN - ----E3 CLOSED V FABRICATE CONTROL I4ORN FROM VIB PIANO WIRE WRAP WITH SOFT WIRE ANO SOLDER REL S4UT-OFF DETAIL ilNx -N 3/4 OZ COOLING OIJTLET\1/4OS 4OSR OR EQUIVI COOLING BlAT 77/VDIANETER BANTELS PROP OR EGUlVJ MIDWEST PROTO PAN s 6i/4 c 7-\I1 WIRE L G WITH I/BPIANOI5/B DONS WHEEL -FLATTENED V410 BRASS TUBING SLEEVE THREADED H NGES Ca 0 Hooptee MK III six eight holes through weight cross-wise wood about 1/8 deep Remove weight apply generous amount resin pocket Reinstall weight clamp position resin will ooze out holes provide good mechanical bond can also covered patch fiberglass cloth reinforcement resin has set up use sanding block sand both leadout tube area wing weight area bring back perfectly flat plane Turn wing over carve airfoil using small block plane Take time step gouge wood leaving scar cannot sanded out airfoil should conform crosssections shown plans Finish up various grits sandpaper ending up about 200 grit Now part thats probably got scared the upper fuselage top can purchased W-K Hobbies actually quite easy work So dont panic Calmly take top po sition next pan engine sembly Mark off approximate posi tion glow plug engine Drill eter hole position Now carefully file use Dremel tool gradually increase diameter hole until about /8 diameter smaller cylinder head Place top over engine pan occasionally check ing location Now mark off cut-outs engine lugs shut off cut out appropriate notches Now slowly continue open up cylinder head hole until fits exactly way want try use about 1/32 clearance around head Now mark off cut out exhaust opening cooling vent inlet outlet shown plans Locate position wing leading edge top scribe lines e bottom top leading edge location rearward 4 Make paper template wing cross-section center chord position Scribe form both sides fiber glass top using flat scribed lines leading edge locaters Now drill /s hole somewhere near center begin file use Dremel cut openings scribed lines get close try insert wing keep reworking openings until wing will just slip position Now go back wing Take 2 Veco now & L bellcrank bend leadout tabs down 300 angle Using gouge router cut appropriate grooves allow bellcrank swing through 600 arc Drill 9/64 hole through wing bellcrank bolt insert 6-32 blind nut through top Above Top view model after three years flyingnote thread-sewn hinges Right Pushrod belicrank detailnote alligator clip finger contact Bottom Wing tip skid installa donnecessary one-wheel main gear Prop fiberglass fuel 50 70% nitromethane wing epoxy place Remove bellcrank slip wing back position Extreme care must taken assure wing parallel bottom top perpendicular fuselage centerline exact fore aft position shown plans 2/s engine cylinder center Now use 5-minute epoxy glue wing position nerves havent failed now youre set An alternate top construction also shown plan care old fashioned way balsa bass wood construction just functional takes time stabilizer should quite straight forward Use good quality basswood use plywood stab carved same way wing should have flat-bottom airfoil shown prefer home-made control horn shown plans can sub stitute commercial Veco & L other version horn shown plans can easily fabricated using 1/16 piano wire vise little care stab mounted pan using 4-40 X s through bottom pan 4-40 blind nuts through top stab stab should hinged until after painting although prefer drill hinge thread holes prior painting desire good quality RC nylon hinges can substituted thread version Provide hole fiberglass top fuel tank fill cut out slots ihe continued page 79 January 1976 31 new LEADER 500 class sport pylon racing & fun flys FEATURES _____MACHINED BALSA PARTS _____COMPLETE HARDWARE PAC FULL SIZE PLANS AL LANDING GEAR THEPRE-LAM BITSFUSE SIDES CONSTRUCTION PHOTOS mASSY INSTRUCTIONS 0c 3995ius postage dealer inquiries invited ri i5MADISON LJJest PH 602275-8653 Throughout past Contest season have received fine pictures over country Modelers coming up some really outstanding scale models think Stand off Scale has shot arm stimulate imagination modeler wants bird look like full-size aircraft such model J F Alexanders Abilene Texas P-38-the forked-tail devil Japanese WW II called P-38 very distinctive model flying easily recog nizable J Es P-38 unique hand made molds its fiberglass also hand-made own retracts things tires pride joy have seen fine P-38 fly real tribute P-38 Lightning WW II fame Jerry Farr Abilene responsible fine picture sent Bob Strobel Detroit Mich sent very unusual picture ME 262 WW II Ger man jet fighter Bob reports 262 flies fast stable ST 60 all-wood construc tion light 75 lbs Im sure Stand-off Scale 262 would impressive air have also looked long hard several jet aircraft would really adapt Stand-off Scale nothing rules AMA Stand-off Scale rules forbid jet subjects conven tional powerplants remember several years ago World FAI Scale Champion ship won ME 163 Komet rocket motor-powered flying wing aircraft WW II model powered standard model engine same Bobs 262 So some digging see some early jets would make good scale model Also remember day ducted fan almost reality powering scale models Old friend Dave Platt pioneering type powerplant scale models Till next time keep fine black white pictures coming hope use possible address 734 North 6th St Terrace Blue Springs Mo 64015 Hooptee MK III/Kilsdonk continued page 31 stabilizer top location shown can add fillets around wing joint using either plastic balsa micro-bal loons sanding desired contour should also dam up upper fuselage area above wing using either materials will prevent fuel splashing area Now have locate again top pan drill 7/64 hole through top wing assembly through pan indicated positions front hold-down screws Similarly rear top rear hold-down position After drilling 7/64 holes through pan tap three holes 6-32 tap Enlarge 7/64 holes drilled through top 3/16 cut off lengths 3/16 OD X 5/32 ID brass tubing about 11/4 long tubing pushed through holes top top installed pan Run three 6-32 X 2 bolts through brass tubing thread pan Draw three bolts down tight making sure brass tubing seated against pan Now take masking tape rubber bands securely clamp top pan point brass tubing inserts should extending well above top Apply small amount 5-minute epoxy tube top surface will hold tubing its proper position tape rubber bands removed After epoxy set remove top turn over Additional heavy amounts epoxy should applied inside top securely hold tubing place lay /2 strip heavy fiberglass tape over tubes under wing cement well top additional reinforcement can use either epoxy polyester resin cement tape place securely hold tube rear dam up area about 1/4 front tube modeling clay works great pour mixture micro-bal loons resin sets-up can easily sanded flat remove clay before sanding excess tubing original epoxy top side trimmed off use ted end-mill drill press however counter sink Dremel can also used effectively finish have found easiest durable apply two coats surfacing polyester resin wood surfaces fillets sanding generously after coat Also fiberglass top must sanded lightly remove mold release agent present apply Hobby poxy K&B epoxy usually two coats wet sand 400 wet dry sand paper Apply decals desired finish up coat clear epoxy over everything stab must now hinged re-drill hinge holes remove accu mulated resin paint sew hinge using flying line heavy carpet thread Mount 030 brass hot wire pad cowl connect short length #16 wire run through cowl up through top install mini-al ligator clip forms leg pit battery connection pan grounded engine forms other leg brass plate should located comfortable convenient pit man Install bellcrank leadout wires prefer 1/32 piano wire leadouts ever flexible cable 125# test fine also Use small drop Locktite bellcrank mounting screw prevent coming loose use wing tip skid outboard wing Although entirely necessary like tail skid saves lot wear tear tip skid formed 1/16 piano wire held place using 4-40 bolt blind-mounting nut Actually prefer solder small 020 brass plate utilize two such screws hold place Mount stab using 4-40 x 3/4 January 1976 79 aIF7FA5LAL E WWII SCALE AIRCRAFT PLANS Send $100 Catalogue Containing copy Superscale drawing Superscale Box 201 Arlington Texas 76012 Hooptee MK Ill continued bolts blind mounting nuts run 1/16 pushrod outside hole belicrank control horn stab will have experiment different lengths wire get proper movement like 450 up 300 down controls operating prop erly small pushrod must fabricated trip fuel shut-off Again use short length / 16 piano wire connect ed inside hole belicrank runs through small angle bracket mount ed inside cowl Experiment length until fuel shut-off will trip just prior full down elevator Now mount top pan youre ready test fly prefer fiberglass prop pitched accord ing details plans Use fuel 50% 70% nitromethane good quality lubricant Several new glow plugs now available Preliminary tests have indicated Gb-Bee Fusite Div Emerson Elec has best dura bility should experiment differ ent props fuels glow plugs deter what suits best take-off mandatory maintain neutral elevator until model FULL-SIZE PLANS No 123 4-Bits 40-powered RC Quickie 500 has winning ways Good sport too No 124 Semi-Pro Contest-winning HLglider has pop-up tail dethermalizer No 125 HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Timer No 126 Hooptee MK III John Kilsdonks CL Rat Racer involves latest state-of-the art No 100Hinnants F-5$450 ultimate maneuverability smoothness 60 Pattern job has No101Short Seamew $300 40-powered class carrier model good prototype lends itself innovations No 102French Wench $225 Free Flight classes 1/2A 049 051a fully tested design No 103Kloud King $400 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF No 104Wiley Post Biplane $225 Petite durable scale design either rubber tail wagger pulse rudder No 105Harold Ruarks Sportsman $450 dream RC cabin iob pretty smooth lines 40 powered full-house No 106Vought Kingfisher $450 semi-scale fully stuntable control Line model Len King IFor 25 35 engines No 107Aeronca K $200 24 wingspan ubber Indoor Scale oldtime lightplane Its done 90 seconds No108Electrgc $375 Couldnt done Dick Sarpolus Astro 25 RC job performs pattern No 109Bill Fuoris Quarter Midget $300 Developed House Balsa design modifications faster times No110The Zipper $175 latest CL Scale Racers John Kils donk job isa must racing fans No111MaxA-Million $375 fleet free flights problem good A/B FAI $400 $100 $175 $175 No 1125neat$275 Sport RC glider simple job can flown engine No113Cessna 150 Aerobat$275 Step up Half-A CL jobs 09-powered semi-profile easy build fly No 114Ernie Violetts DH Comet$900 CL Scale 1974 Nuts first-place winner twin flies beautifully No115Niris$400 An RC pattern job takes advan tage best esisting criteria No116Electro-Lite$150 Hal Covers contest-type free flight VTOs Hytork electric motor No117Novice$150 simple beginners A-t Nordic con structed entirely sheet balsa No 118 GollyGeeWhiz$150 Dan Rutherfords simple Half-A powered Combat job turns dime No119 Four Beginners Too$300 basic RC trainer 09 15s rudder elevator motor controls No 120 Cathexis$450 Dave Parsonr FAI FF has auto-elevator rudder prop brake No 121 Gremlin$300 Sturdy aerobatic RC biplane flies well 35s up 60s No122 HotWood$100 Twice Nats winner Rocket allbalsa Jetes-powered job Circle numbers plans wish order 100 101102103 107108 114115 104 105 106 109110111112113 116117118119 121122123 Enclosed $ 124 120 125126 Please print carefully NAME STREET CITY STATE 71 P Price includes first-class postage Send check money order payable Model Aviation AMA 806 Fifteenth St. NW. Washington DC 20005 airborne will find Hooptee built according plans extremely stable flies easily response con trol may appear somewhat sluggish intended way Too often heat race 150 mph pilot will take eyes off model watch pit crew signals glance other model race hell crash plane cause too sensitive control effort help potentialnew fliers get involved rat race following list whereto get specialty items will find items quite available will help immensely getting started have personally dealt sources can honestly recommend also feature good mail order facilities W-K Hobbies 19 N Main Centerville Ohio 45459 513 433-0752 Fiberglass tops rat tanks fiberglass props fuel shut offs wheels other hobby items Aldrich Products Inc PO Box 1426 Mission Tex 78572 512 585-7681 En gine rework fuel glow plugs chrome plating Joes Hobby Centers Inc 7845 Wyo ming Ave Dearborn Mich 48126 313 9336567 Bartels Props Ucon & Klotz Oil premixed fuel Dons products other standard hobby items Fusite Division Emerson Electric Com pany 6000 Fernview Ave Cincinnati Ohio 45212 513731-2020 Gb -Bee Plugs Randys Model Aeronautics 515 Cole man Blvd Mount Pleasant SC 29464 803884-7411 Fuels distributor Dons Products other hobbr Items ADVERTISERS INDEX Ace Radio Control Inc I Andrews Aircraft Model Co 67 AMAPR 75 Bantam Precision Products Inc leveland Model & Supply Co 73 Coverite 73 Du-Bro Products Inc 69 EK-logictrol77 Carl Goldberg Models 3 Grish Brothers 71 G-S Products Corp Intl 70 Harrys Hobbies Inc 78 JR Sales Company 75 Midwest Products Company66 Models West Inc79 Peck-Polymers76 Polks Hobbies74 Rare Birds73 Satellite City71 Sig Mfg Company25 SPSystems68 Sterling Models Inc68 Sullivan Products Inc72 Superscale79 TeleCraft72 VI Products76 Williams Brothers71 World EnginesBack Cover 80 Modet Aviation
Edition: Model Aviation - 1976/01
Page Numbers: 28, 29, 30, 31, 79, 80
RAT RACING has evolved good beginners event probably competitive control-line event its 20 some years existence old days form aircraft acceptable long would take off land winner usually could successfully restart engine couple times race things have changed recent years state-of-the-art has up graded both through technological im provements engines also flying techniques improvements have proven demise event Participation especially new people practically non-existent feel lack participation new blood directly attributable two areas lack available information lack pilots intent article make available potential new comer details get started event Hooptee MK III Model presented article typical modern rat racers represents third basic design change have made rat racer designs past 12 years have using design three years has such consistent performer other top competitors Midwest area now using also include Bill Allen John Ballard Gary Fentress Bob Finely Pat Flinn quite easy construct once have gone through exercise time two first time through may scare bit due un usual construction technique namely fiberglass top future models will become quite easy confidence improves HOOPTE*B MKIIL updde c ro racing John F Kilsdonk first step select engine As writing HP-40 RRV engine popular However enough work being put OS-405R some day should least rank equal better HP Other 40-size engines avail able however passes both qualities absolutely necessary good rat engine high performance fast re start capability Whatever engine select start should fitted Midwest former ly Harters pinto speed pan can obtained through good hobby shop pan will require some grinding mount engine modifications pan should kept minimum structually weaken engine mounted using 4-40 X s requires drilling tapping pan after locating engine next step install landing gear single wheel landing gear shown plans has proven very popular because its ease installation extreme durability An 1/8 hole drilled through inboard side dimple location pan Another /8 hole drilled approximately 1 rear wing mounting boss pan Select 15 18 length of/g piano wire make two right angle bends same plane approximately middle piece center distance bends should correspond exactly center distance two landing gear holes Both holes drilled pan should radiused top accept radius piano wire bends Slip piano wire through two holes lightly tap place until well seated point Above Basic components prior assembly Below Finished wing engine/pen assembly fiberglass fuselage top has cut out match engine wing Leadout tubes covered basswood strips wing tip weight place its special cut-Out 28 Model Aviation take rearward wire bend forward close pan possible make another bend parallel right against back front wire Take length rass tubing gently flatten ID cross-section vise Slip over two pieces piano wire lightly tap position Mark rear wire bottom edge brass tubing Remove tubing cut-off rear wire mark Reinstall tubing bend whole assembly forward wheel axle will approximately 2 inches front front wire exits pan Measure engine mounting surface pan down 4 inches loca tion wheel axle Bend forward /8 piano wire inboard side 900 angle parallel future wing centerline Install l/8 Dons wheel soldering No 4 flat washer both sides trim off excess wire use wheel collars hold wheel tend vibrate loose Next step install fuel shut-off pan located directly behind engine Leave enough clearance fuel lines pass through use W-K shut-off find sim plest effective using shut-off may find can get closer engine notching out extra fuel line clearance Next install fuel tank Either Dons 4 oz rat tank W-K rat tank will work very well Personally use combination both tanks cut off front section Dons tank solder W-K tank gives about apacity 4 oz tank adequate 60-70 laps engines However security pre fer extra apacity fuel tank should securely mounted pan using 020 brass angle brackets soldered both front rear tank held place 4-40 bolts through pan tail skid necessary although will save some wear tear lot top competitors use however prefer use 3/32 piano wire version formed bolt pan preceding steps should complete pan installation except two items prefer round off front end pan conform contour shown plans very simple utilizing disk sander l motor top wing assembly stabilizer assembly bolted pan will done later wing material should selected light basswood select ponderosa pine pinch have used board shipping crate wood should planed sanded 5/16 thickness 5/16 X 4 X 28 blank required Cut out plan form wing configu rapid advances Rat Racing discourage newcomers state-of-the-art article presents valuable unpublicized information ration shown plans leadout tube grooves can cut using little care X-acto gouge easy way use router bought Sears standard router about $3000 sure saves time gives much cleaner finished product using hand gouge grooves need /8 wide /8 deep use router cut grooves 5/32 deep using 1/8 dia blade mill 1/32 X groove top allows 1/32 X wood cap available model railroad supply stores Whichever tube installation method used /8 aluminum tubes should held place small amount fiberglass polyester resin basswood caps installed using same material caps used fill balance grooves plastic balsa surfacing resin mixed micro-balloons outboard wing weight must consistent performance especially windy days Gougeor use routera pocket /8 deep X 1 long X shown near outboard wing tip filled lead solder either two ways can hammer length bar solder /8 thickness cut out piece fit pocket can melting solder dripping pocket Drill about January 1976 29 Wing assembled fiberglass topnote fillets wing joint Engine fuel tank mounted pan Either Dons 4-oz rat tank W-K rat tank work equally wellusually 60-70 laps Complete assembly prior painting Note fuel shut-off just rear needle valve An alter nate top construction shown plan Balsa basswood just take time IIOOPTEE MIcII 0CONTROLEE RAT RACER DeIg9d dDrorw hj Jaw KLSDOAW 0 e BASS WOOD BALSA 7~ MACHINED RECESS ALUMINUM TUBING V32I/4 BASSWOOD LEADOUT DETAILS 4 —X-recrZt~N~t REINFORCE COWL WITH FIBREGLASS ALTERNATE TOP CONSTRUCTION I/35 LEADOUTS LB ALUM TUBING IMBEDDED IN BOTTOM OF WINGVtB32111/2BOLTS .............................. ][b-1-10-1-10]] -iIIit IOPTIONAL FILLETS BASSWOOO-WING YOUR AMA NUMBER IREQO 012345B Inches S BELLCRANK W-K Ho091eMOLOED FIBREGLASS TOP B-32 I-I/V BOLT ID BRASS TUBING SLEEVE ITYP V16 PIANO WIRE WING TIP SJ B B OPEN - ----E3 CLOSED V FABRICATE CONTROL I4ORN FROM VIB PIANO WIRE WRAP WITH SOFT WIRE ANO SOLDER REL S4UT-OFF DETAIL ilNx -N 3/4 OZ COOLING OIJTLET\1/4OS 4OSR OR EQUIVI COOLING BlAT 77/VDIANETER BANTELS PROP OR EGUlVJ MIDWEST PROTO PAN s 6i/4 c 7-\I1 WIRE L G WITH I/BPIANOI5/B DONS WHEEL -FLATTENED V410 BRASS TUBING SLEEVE THREADED H NGES Ca 0 Hooptee MK III six eight holes through weight cross-wise wood about 1/8 deep Remove weight apply generous amount resin pocket Reinstall weight clamp position resin will ooze out holes provide good mechanical bond can also covered patch fiberglass cloth reinforcement resin has set up use sanding block sand both leadout tube area wing weight area bring back perfectly flat plane Turn wing over carve airfoil using small block plane Take time step gouge wood leaving scar cannot sanded out airfoil should conform crosssections shown plans Finish up various grits sandpaper ending up about 200 grit Now part thats probably got scared the upper fuselage top can purchased W-K Hobbies actually quite easy work So dont panic Calmly take top po sition next pan engine sembly Mark off approximate posi tion glow plug engine Drill eter hole position Now carefully file use Dremel tool gradually increase diameter hole until about /8 diameter smaller cylinder head Place top over engine pan occasionally check ing location Now mark off cut-outs engine lugs shut off cut out appropriate notches Now slowly continue open up cylinder head hole until fits exactly way want try use about 1/32 clearance around head Now mark off cut out exhaust opening cooling vent inlet outlet shown plans Locate position wing leading edge top scribe lines e bottom top leading edge location rearward 4 Make paper template wing cross-section center chord position Scribe form both sides fiber glass top using flat scribed lines leading edge locaters Now drill /s hole somewhere near center begin file use Dremel cut openings scribed lines get close try insert wing keep reworking openings until wing will just slip position Now go back wing Take 2 Veco now & L bellcrank bend leadout tabs down 300 angle Using gouge router cut appropriate grooves allow bellcrank swing through 600 arc Drill 9/64 hole through wing bellcrank bolt insert 6-32 blind nut through top Above Top view model after three years flyingnote thread-sewn hinges Right Pushrod belicrank detailnote alligator clip finger contact Bottom Wing tip skid installa donnecessary one-wheel main gear Prop fiberglass fuel 50 70% nitromethane wing epoxy place Remove bellcrank slip wing back position Extreme care must taken assure wing parallel bottom top perpendicular fuselage centerline exact fore aft position shown plans 2/s engine cylinder center Now use 5-minute epoxy glue wing position nerves havent failed now youre set An alternate top construction also shown plan care old fashioned way balsa bass wood construction just functional takes time stabilizer should quite straight forward Use good quality basswood use plywood stab carved same way wing should have flat-bottom airfoil shown prefer home-made control horn shown plans can sub stitute commercial Veco & L other version horn shown plans can easily fabricated using 1/16 piano wire vise little care stab mounted pan using 4-40 X s through bottom pan 4-40 blind nuts through top stab stab should hinged until after painting although prefer drill hinge thread holes prior painting desire good quality RC nylon hinges can substituted thread version Provide hole fiberglass top fuel tank fill cut out slots ihe continued page 79 January 1976 31 new LEADER 500 class sport pylon racing & fun flys FEATURES _____MACHINED BALSA PARTS _____COMPLETE HARDWARE PAC FULL SIZE PLANS AL LANDING GEAR THEPRE-LAM BITSFUSE SIDES CONSTRUCTION PHOTOS mASSY INSTRUCTIONS 0c 3995ius postage dealer inquiries invited ri i5MADISON LJJest PH 602275-8653 Throughout past Contest season have received fine pictures over country Modelers coming up some really outstanding scale models think Stand off Scale has shot arm stimulate imagination modeler wants bird look like full-size aircraft such model J F Alexanders Abilene Texas P-38-the forked-tail devil Japanese WW II called P-38 very distinctive model flying easily recog nizable J Es P-38 unique hand made molds its fiberglass also hand-made own retracts things tires pride joy have seen fine P-38 fly real tribute P-38 Lightning WW II fame Jerry Farr Abilene responsible fine picture sent Bob Strobel Detroit Mich sent very unusual picture ME 262 WW II Ger man jet fighter Bob reports 262 flies fast stable ST 60 all-wood construc tion light 75 lbs Im sure Stand-off Scale 262 would impressive air have also looked long hard several jet aircraft would really adapt Stand-off Scale nothing rules AMA Stand-off Scale rules forbid jet subjects conven tional powerplants remember several years ago World FAI Scale Champion ship won ME 163 Komet rocket motor-powered flying wing aircraft WW II model powered standard model engine same Bobs 262 So some digging see some early jets would make good scale model Also remember day ducted fan almost reality powering scale models Old friend Dave Platt pioneering type powerplant scale models Till next time keep fine black white pictures coming hope use possible address 734 North 6th St Terrace Blue Springs Mo 64015 Hooptee MK III/Kilsdonk continued page 31 stabilizer top location shown can add fillets around wing joint using either plastic balsa micro-bal loons sanding desired contour should also dam up upper fuselage area above wing using either materials will prevent fuel splashing area Now have locate again top pan drill 7/64 hole through top wing assembly through pan indicated positions front hold-down screws Similarly rear top rear hold-down position After drilling 7/64 holes through pan tap three holes 6-32 tap Enlarge 7/64 holes drilled through top 3/16 cut off lengths 3/16 OD X 5/32 ID brass tubing about 11/4 long tubing pushed through holes top top installed pan Run three 6-32 X 2 bolts through brass tubing thread pan Draw three bolts down tight making sure brass tubing seated against pan Now take masking tape rubber bands securely clamp top pan point brass tubing inserts should extending well above top Apply small amount 5-minute epoxy tube top surface will hold tubing its proper position tape rubber bands removed After epoxy set remove top turn over Additional heavy amounts epoxy should applied inside top securely hold tubing place lay /2 strip heavy fiberglass tape over tubes under wing cement well top additional reinforcement can use either epoxy polyester resin cement tape place securely hold tube rear dam up area about 1/4 front tube modeling clay works great pour mixture micro-bal loons resin sets-up can easily sanded flat remove clay before sanding excess tubing original epoxy top side trimmed off use ted end-mill drill press however counter sink Dremel can also used effectively finish have found easiest durable apply two coats surfacing polyester resin wood surfaces fillets sanding generously after coat Also fiberglass top must sanded lightly remove mold release agent present apply Hobby poxy K&B epoxy usually two coats wet sand 400 wet dry sand paper Apply decals desired finish up coat clear epoxy over everything stab must now hinged re-drill hinge holes remove accu mulated resin paint sew hinge using flying line heavy carpet thread Mount 030 brass hot wire pad cowl connect short length #16 wire run through cowl up through top install mini-al ligator clip forms leg pit battery connection pan grounded engine forms other leg brass plate should located comfortable convenient pit man Install bellcrank leadout wires prefer 1/32 piano wire leadouts ever flexible cable 125# test fine also Use small drop Locktite bellcrank mounting screw prevent coming loose use wing tip skid outboard wing Although entirely necessary like tail skid saves lot wear tear tip skid formed 1/16 piano wire held place using 4-40 bolt blind-mounting nut Actually prefer solder small 020 brass plate utilize two such screws hold place Mount stab using 4-40 x 3/4 January 1976 79 aIF7FA5LAL E WWII SCALE AIRCRAFT PLANS Send $100 Catalogue Containing copy Superscale drawing Superscale Box 201 Arlington Texas 76012 Hooptee MK Ill continued bolts blind mounting nuts run 1/16 pushrod outside hole belicrank control horn stab will have experiment different lengths wire get proper movement like 450 up 300 down controls operating prop erly small pushrod must fabricated trip fuel shut-off Again use short length / 16 piano wire connect ed inside hole belicrank runs through small angle bracket mount ed inside cowl Experiment length until fuel shut-off will trip just prior full down elevator Now mount top pan youre ready test fly prefer fiberglass prop pitched accord ing details plans Use fuel 50% 70% nitromethane good quality lubricant Several new glow plugs now available Preliminary tests have indicated Gb-Bee Fusite Div Emerson Elec has best dura bility should experiment differ ent props fuels glow plugs deter what suits best take-off mandatory maintain neutral elevator until model FULL-SIZE PLANS No 123 4-Bits 40-powered RC Quickie 500 has winning ways Good sport too No 124 Semi-Pro Contest-winning HLglider has pop-up tail dethermalizer No 125 HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Timer No 126 Hooptee MK III John Kilsdonks CL Rat Racer involves latest state-of-the art No 100Hinnants F-5$450 ultimate maneuverability smoothness 60 Pattern job has No101Short Seamew $300 40-powered class carrier model good prototype lends itself innovations No 102French Wench $225 Free Flight classes 1/2A 049 051a fully tested design No 103Kloud King $400 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF No 104Wiley Post Biplane $225 Petite durable scale design either rubber tail wagger pulse rudder No 105Harold Ruarks Sportsman $450 dream RC cabin iob pretty smooth lines 40 powered full-house No 106Vought Kingfisher $450 semi-scale fully stuntable control Line model Len King IFor 25 35 engines No 107Aeronca K $200 24 wingspan ubber Indoor Scale oldtime lightplane Its done 90 seconds No108Electrgc $375 Couldnt done Dick Sarpolus Astro 25 RC job performs pattern No 109Bill Fuoris Quarter Midget $300 Developed House Balsa design modifications faster times No110The Zipper $175 latest CL Scale Racers John Kils donk job isa must racing fans No111MaxA-Million $375 fleet free flights problem good A/B FAI $400 $100 $175 $175 No 1125neat$275 Sport RC glider simple job can flown engine No113Cessna 150 Aerobat$275 Step up Half-A CL jobs 09-powered semi-profile easy build fly No 114Ernie Violetts DH Comet$900 CL Scale 1974 Nuts first-place winner twin flies beautifully No115Niris$400 An RC pattern job takes advan tage best esisting criteria No116Electro-Lite$150 Hal Covers contest-type free flight VTOs Hytork electric motor No117Novice$150 simple beginners A-t Nordic con structed entirely sheet balsa No 118 GollyGeeWhiz$150 Dan Rutherfords simple Half-A powered Combat job turns dime No119 Four Beginners Too$300 basic RC trainer 09 15s rudder elevator motor controls No 120 Cathexis$450 Dave Parsonr FAI FF has auto-elevator rudder prop brake No 121 Gremlin$300 Sturdy aerobatic RC biplane flies well 35s up 60s No122 HotWood$100 Twice Nats winner Rocket allbalsa Jetes-powered job Circle numbers plans wish order 100 101102103 107108 114115 104 105 106 109110111112113 116117118119 121122123 Enclosed $ 124 120 125126 Please print carefully NAME STREET CITY STATE 71 P Price includes first-class postage Send check money order payable Model Aviation AMA 806 Fifteenth St. NW. Washington DC 20005 airborne will find Hooptee built according plans extremely stable flies easily response con trol may appear somewhat sluggish intended way Too often heat race 150 mph pilot will take eyes off model watch pit crew signals glance other model race hell crash plane cause too sensitive control effort help potentialnew fliers get involved rat race following list whereto get specialty items will find items quite available will help immensely getting started have personally dealt sources can honestly recommend also feature good mail order facilities W-K Hobbies 19 N Main Centerville Ohio 45459 513 433-0752 Fiberglass tops rat tanks fiberglass props fuel shut offs wheels other hobby items Aldrich Products Inc PO Box 1426 Mission Tex 78572 512 585-7681 En gine rework fuel glow plugs chrome plating Joes Hobby Centers Inc 7845 Wyo ming Ave Dearborn Mich 48126 313 9336567 Bartels Props Ucon & Klotz Oil premixed fuel Dons products other standard hobby items Fusite Division Emerson Electric Com pany 6000 Fernview Ave Cincinnati Ohio 45212 513731-2020 Gb -Bee Plugs Randys Model Aeronautics 515 Cole man Blvd Mount Pleasant SC 29464 803884-7411 Fuels distributor Dons Products other hobbr Items ADVERTISERS INDEX Ace Radio Control Inc I Andrews Aircraft Model Co 67 AMAPR 75 Bantam Precision Products Inc leveland Model & Supply Co 73 Coverite 73 Du-Bro Products Inc 69 EK-logictrol77 Carl Goldberg Models 3 Grish Brothers 71 G-S Products Corp Intl 70 Harrys Hobbies Inc 78 JR Sales Company 75 Midwest Products Company66 Models West Inc79 Peck-Polymers76 Polks Hobbies74 Rare Birds73 Satellite City71 Sig Mfg Company25 SPSystems68 Sterling Models Inc68 Sullivan Products Inc72 Superscale79 TeleCraft72 VI Products76 Williams Brothers71 World EnginesBack Cover 80 Modet Aviation
Edition: Model Aviation - 1976/01
Page Numbers: 28, 29, 30, 31, 79, 80
RAT RACING has evolved good beginners event probably competitive control-line event its 20 some years existence old days form aircraft acceptable long would take off land winner usually could successfully restart engine couple times race things have changed recent years state-of-the-art has up graded both through technological im provements engines also flying techniques improvements have proven demise event Participation especially new people practically non-existent feel lack participation new blood directly attributable two areas lack available information lack pilots intent article make available potential new comer details get started event Hooptee MK III Model presented article typical modern rat racers represents third basic design change have made rat racer designs past 12 years have using design three years has such consistent performer other top competitors Midwest area now using also include Bill Allen John Ballard Gary Fentress Bob Finely Pat Flinn quite easy construct once have gone through exercise time two first time through may scare bit due un usual construction technique namely fiberglass top future models will become quite easy confidence improves HOOPTE*B MKIIL updde c ro racing John F Kilsdonk first step select engine As writing HP-40 RRV engine popular However enough work being put OS-405R some day should least rank equal better HP Other 40-size engines avail able however passes both qualities absolutely necessary good rat engine high performance fast re start capability Whatever engine select start should fitted Midwest former ly Harters pinto speed pan can obtained through good hobby shop pan will require some grinding mount engine modifications pan should kept minimum structually weaken engine mounted using 4-40 X s requires drilling tapping pan after locating engine next step install landing gear single wheel landing gear shown plans has proven very popular because its ease installation extreme durability An 1/8 hole drilled through inboard side dimple location pan Another /8 hole drilled approximately 1 rear wing mounting boss pan Select 15 18 length of/g piano wire make two right angle bends same plane approximately middle piece center distance bends should correspond exactly center distance two landing gear holes Both holes drilled pan should radiused top accept radius piano wire bends Slip piano wire through two holes lightly tap place until well seated point Above Basic components prior assembly Below Finished wing engine/pen assembly fiberglass fuselage top has cut out match engine wing Leadout tubes covered basswood strips wing tip weight place its special cut-Out 28 Model Aviation take rearward wire bend forward close pan possible make another bend parallel right against back front wire Take length rass tubing gently flatten ID cross-section vise Slip over two pieces piano wire lightly tap position Mark rear wire bottom edge brass tubing Remove tubing cut-off rear wire mark Reinstall tubing bend whole assembly forward wheel axle will approximately 2 inches front front wire exits pan Measure engine mounting surface pan down 4 inches loca tion wheel axle Bend forward /8 piano wire inboard side 900 angle parallel future wing centerline Install l/8 Dons wheel soldering No 4 flat washer both sides trim off excess wire use wheel collars hold wheel tend vibrate loose Next step install fuel shut-off pan located directly behind engine Leave enough clearance fuel lines pass through use W-K shut-off find sim plest effective using shut-off may find can get closer engine notching out extra fuel line clearance Next install fuel tank Either Dons 4 oz rat tank W-K rat tank will work very well Personally use combination both tanks cut off front section Dons tank solder W-K tank gives about apacity 4 oz tank adequate 60-70 laps engines However security pre fer extra apacity fuel tank should securely mounted pan using 020 brass angle brackets soldered both front rear tank held place 4-40 bolts through pan tail skid necessary although will save some wear tear lot top competitors use however prefer use 3/32 piano wire version formed bolt pan preceding steps should complete pan installation except two items prefer round off front end pan conform contour shown plans very simple utilizing disk sander l motor top wing assembly stabilizer assembly bolted pan will done later wing material should selected light basswood select ponderosa pine pinch have used board shipping crate wood should planed sanded 5/16 thickness 5/16 X 4 X 28 blank required Cut out plan form wing configu rapid advances Rat Racing discourage newcomers state-of-the-art article presents valuable unpublicized information ration shown plans leadout tube grooves can cut using little care X-acto gouge easy way use router bought Sears standard router about $3000 sure saves time gives much cleaner finished product using hand gouge grooves need /8 wide /8 deep use router cut grooves 5/32 deep using 1/8 dia blade mill 1/32 X groove top allows 1/32 X wood cap available model railroad supply stores Whichever tube installation method used /8 aluminum tubes should held place small amount fiberglass polyester resin basswood caps installed using same material caps used fill balance grooves plastic balsa surfacing resin mixed micro-balloons outboard wing weight must consistent performance especially windy days Gougeor use routera pocket /8 deep X 1 long X shown near outboard wing tip filled lead solder either two ways can hammer length bar solder /8 thickness cut out piece fit pocket can melting solder dripping pocket Drill about January 1976 29 Wing assembled fiberglass topnote fillets wing joint Engine fuel tank mounted pan Either Dons 4-oz rat tank W-K rat tank work equally wellusually 60-70 laps Complete assembly prior painting Note fuel shut-off just rear needle valve An alter nate top construction shown plan Balsa basswood just take time IIOOPTEE MIcII 0CONTROLEE RAT RACER DeIg9d dDrorw hj Jaw KLSDOAW 0 e BASS WOOD BALSA 7~ MACHINED RECESS ALUMINUM TUBING V32I/4 BASSWOOD LEADOUT DETAILS 4 —X-recrZt~N~t REINFORCE COWL WITH FIBREGLASS ALTERNATE TOP CONSTRUCTION I/35 LEADOUTS LB ALUM TUBING IMBEDDED IN BOTTOM OF WINGVtB32111/2BOLTS .............................. ][b-1-10-1-10]] -iIIit IOPTIONAL FILLETS BASSWOOO-WING YOUR AMA NUMBER IREQO 012345B Inches S BELLCRANK W-K Ho091eMOLOED FIBREGLASS TOP B-32 I-I/V BOLT ID BRASS TUBING SLEEVE ITYP V16 PIANO WIRE WING TIP SJ B B OPEN - ----E3 CLOSED V FABRICATE CONTROL I4ORN FROM VIB PIANO WIRE WRAP WITH SOFT WIRE ANO SOLDER REL S4UT-OFF DETAIL ilNx -N 3/4 OZ COOLING OIJTLET\1/4OS 4OSR OR EQUIVI COOLING BlAT 77/VDIANETER BANTELS PROP OR EGUlVJ MIDWEST PROTO PAN s 6i/4 c 7-\I1 WIRE L G WITH I/BPIANOI5/B DONS WHEEL -FLATTENED V410 BRASS TUBING SLEEVE THREADED H NGES Ca 0 Hooptee MK III six eight holes through weight cross-wise wood about 1/8 deep Remove weight apply generous amount resin pocket Reinstall weight clamp position resin will ooze out holes provide good mechanical bond can also covered patch fiberglass cloth reinforcement resin has set up use sanding block sand both leadout tube area wing weight area bring back perfectly flat plane Turn wing over carve airfoil using small block plane Take time step gouge wood leaving scar cannot sanded out airfoil should conform crosssections shown plans Finish up various grits sandpaper ending up about 200 grit Now part thats probably got scared the upper fuselage top can purchased W-K Hobbies actually quite easy work So dont panic Calmly take top po sition next pan engine sembly Mark off approximate posi tion glow plug engine Drill eter hole position Now carefully file use Dremel tool gradually increase diameter hole until about /8 diameter smaller cylinder head Place top over engine pan occasionally check ing location Now mark off cut-outs engine lugs shut off cut out appropriate notches Now slowly continue open up cylinder head hole until fits exactly way want try use about 1/32 clearance around head Now mark off cut out exhaust opening cooling vent inlet outlet shown plans Locate position wing leading edge top scribe lines e bottom top leading edge location rearward 4 Make paper template wing cross-section center chord position Scribe form both sides fiber glass top using flat scribed lines leading edge locaters Now drill /s hole somewhere near center begin file use Dremel cut openings scribed lines get close try insert wing keep reworking openings until wing will just slip position Now go back wing Take 2 Veco now & L bellcrank bend leadout tabs down 300 angle Using gouge router cut appropriate grooves allow bellcrank swing through 600 arc Drill 9/64 hole through wing bellcrank bolt insert 6-32 blind nut through top Above Top view model after three years flyingnote thread-sewn hinges Right Pushrod belicrank detailnote alligator clip finger contact Bottom Wing tip skid installa donnecessary one-wheel main gear Prop fiberglass fuel 50 70% nitromethane wing epoxy place Remove bellcrank slip wing back position Extreme care must taken assure wing parallel bottom top perpendicular fuselage centerline exact fore aft position shown plans 2/s engine cylinder center Now use 5-minute epoxy glue wing position nerves havent failed now youre set An alternate top construction also shown plan care old fashioned way balsa bass wood construction just functional takes time stabilizer should quite straight forward Use good quality basswood use plywood stab carved same way wing should have flat-bottom airfoil shown prefer home-made control horn shown plans can sub stitute commercial Veco & L other version horn shown plans can easily fabricated using 1/16 piano wire vise little care stab mounted pan using 4-40 X s through bottom pan 4-40 blind nuts through top stab stab should hinged until after painting although prefer drill hinge thread holes prior painting desire good quality RC nylon hinges can substituted thread version Provide hole fiberglass top fuel tank fill cut out slots ihe continued page 79 January 1976 31 new LEADER 500 class sport pylon racing & fun flys FEATURES _____MACHINED BALSA PARTS _____COMPLETE HARDWARE PAC FULL SIZE PLANS AL LANDING GEAR THEPRE-LAM BITSFUSE SIDES CONSTRUCTION PHOTOS mASSY INSTRUCTIONS 0c 3995ius postage dealer inquiries invited ri i5MADISON LJJest PH 602275-8653 Throughout past Contest season have received fine pictures over country Modelers coming up some really outstanding scale models think Stand off Scale has shot arm stimulate imagination modeler wants bird look like full-size aircraft such model J F Alexanders Abilene Texas P-38-the forked-tail devil Japanese WW II called P-38 very distinctive model flying easily recog nizable J Es P-38 unique hand made molds its fiberglass also hand-made own retracts things tires pride joy have seen fine P-38 fly real tribute P-38 Lightning WW II fame Jerry Farr Abilene responsible fine picture sent Bob Strobel Detroit Mich sent very unusual picture ME 262 WW II Ger man jet fighter Bob reports 262 flies fast stable ST 60 all-wood construc tion light 75 lbs Im sure Stand-off Scale 262 would impressive air have also looked long hard several jet aircraft would really adapt Stand-off Scale nothing rules AMA Stand-off Scale rules forbid jet subjects conven tional powerplants remember several years ago World FAI Scale Champion ship won ME 163 Komet rocket motor-powered flying wing aircraft WW II model powered standard model engine same Bobs 262 So some digging see some early jets would make good scale model Also remember day ducted fan almost reality powering scale models Old friend Dave Platt pioneering type powerplant scale models Till next time keep fine black white pictures coming hope use possible address 734 North 6th St Terrace Blue Springs Mo 64015 Hooptee MK III/Kilsdonk continued page 31 stabilizer top location shown can add fillets around wing joint using either plastic balsa micro-bal loons sanding desired contour should also dam up upper fuselage area above wing using either materials will prevent fuel splashing area Now have locate again top pan drill 7/64 hole through top wing assembly through pan indicated positions front hold-down screws Similarly rear top rear hold-down position After drilling 7/64 holes through pan tap three holes 6-32 tap Enlarge 7/64 holes drilled through top 3/16 cut off lengths 3/16 OD X 5/32 ID brass tubing about 11/4 long tubing pushed through holes top top installed pan Run three 6-32 X 2 bolts through brass tubing thread pan Draw three bolts down tight making sure brass tubing seated against pan Now take masking tape rubber bands securely clamp top pan point brass tubing inserts should extending well above top Apply small amount 5-minute epoxy tube top surface will hold tubing its proper position tape rubber bands removed After epoxy set remove top turn over Additional heavy amounts epoxy should applied inside top securely hold tubing place lay /2 strip heavy fiberglass tape over tubes under wing cement well top additional reinforcement can use either epoxy polyester resin cement tape place securely hold tube rear dam up area about 1/4 front tube modeling clay works great pour mixture micro-bal loons resin sets-up can easily sanded flat remove clay before sanding excess tubing original epoxy top side trimmed off use ted end-mill drill press however counter sink Dremel can also used effectively finish have found easiest durable apply two coats surfacing polyester resin wood surfaces fillets sanding generously after coat Also fiberglass top must sanded lightly remove mold release agent present apply Hobby poxy K&B epoxy usually two coats wet sand 400 wet dry sand paper Apply decals desired finish up coat clear epoxy over everything stab must now hinged re-drill hinge holes remove accu mulated resin paint sew hinge using flying line heavy carpet thread Mount 030 brass hot wire pad cowl connect short length #16 wire run through cowl up through top install mini-al ligator clip forms leg pit battery connection pan grounded engine forms other leg brass plate should located comfortable convenient pit man Install bellcrank leadout wires prefer 1/32 piano wire leadouts ever flexible cable 125# test fine also Use small drop Locktite bellcrank mounting screw prevent coming loose use wing tip skid outboard wing Although entirely necessary like tail skid saves lot wear tear tip skid formed 1/16 piano wire held place using 4-40 bolt blind-mounting nut Actually prefer solder small 020 brass plate utilize two such screws hold place Mount stab using 4-40 x 3/4 January 1976 79 aIF7FA5LAL E WWII SCALE AIRCRAFT PLANS Send $100 Catalogue Containing copy Superscale drawing Superscale Box 201 Arlington Texas 76012 Hooptee MK Ill continued bolts blind mounting nuts run 1/16 pushrod outside hole belicrank control horn stab will have experiment different lengths wire get proper movement like 450 up 300 down controls operating prop erly small pushrod must fabricated trip fuel shut-off Again use short length / 16 piano wire connect ed inside hole belicrank runs through small angle bracket mount ed inside cowl Experiment length until fuel shut-off will trip just prior full down elevator Now mount top pan youre ready test fly prefer fiberglass prop pitched accord ing details plans Use fuel 50% 70% nitromethane good quality lubricant Several new glow plugs now available Preliminary tests have indicated Gb-Bee Fusite Div Emerson Elec has best dura bility should experiment differ ent props fuels glow plugs deter what suits best take-off mandatory maintain neutral elevator until model FULL-SIZE PLANS No 123 4-Bits 40-powered RC Quickie 500 has winning ways Good sport too No 124 Semi-Pro Contest-winning HLglider has pop-up tail dethermalizer No 125 HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Timer No 126 Hooptee MK III John Kilsdonks CL Rat Racer involves latest state-of-the art No 100Hinnants F-5$450 ultimate maneuverability smoothness 60 Pattern job has No101Short Seamew $300 40-powered class carrier model good prototype lends itself innovations No 102French Wench $225 Free Flight classes 1/2A 049 051a fully tested design No 103Kloud King $400 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF No 104Wiley Post Biplane $225 Petite durable scale design either rubber tail wagger pulse rudder No 105Harold Ruarks Sportsman $450 dream RC cabin iob pretty smooth lines 40 powered full-house No 106Vought Kingfisher $450 semi-scale fully stuntable control Line model Len King IFor 25 35 engines No 107Aeronca K $200 24 wingspan ubber Indoor Scale oldtime lightplane Its done 90 seconds No108Electrgc $375 Couldnt done Dick Sarpolus Astro 25 RC job performs pattern No 109Bill Fuoris Quarter Midget $300 Developed House Balsa design modifications faster times No110The Zipper $175 latest CL Scale Racers John Kils donk job isa must racing fans No111MaxA-Million $375 fleet free flights problem good A/B FAI $400 $100 $175 $175 No 1125neat$275 Sport RC glider simple job can flown engine No113Cessna 150 Aerobat$275 Step up Half-A CL jobs 09-powered semi-profile easy build fly No 114Ernie Violetts DH Comet$900 CL Scale 1974 Nuts first-place winner twin flies beautifully No115Niris$400 An RC pattern job takes advan tage best esisting criteria No116Electro-Lite$150 Hal Covers contest-type free flight VTOs Hytork electric motor No117Novice$150 simple beginners A-t Nordic con structed entirely sheet balsa No 118 GollyGeeWhiz$150 Dan Rutherfords simple Half-A powered Combat job turns dime No119 Four Beginners Too$300 basic RC trainer 09 15s rudder elevator motor controls No 120 Cathexis$450 Dave Parsonr FAI FF has auto-elevator rudder prop brake No 121 Gremlin$300 Sturdy aerobatic RC biplane flies well 35s up 60s No122 HotWood$100 Twice Nats winner Rocket allbalsa Jetes-powered job Circle numbers plans wish order 100 101102103 107108 114115 104 105 106 109110111112113 116117118119 121122123 Enclosed $ 124 120 125126 Please print carefully NAME STREET CITY STATE 71 P Price includes first-class postage Send check money order payable Model Aviation AMA 806 Fifteenth St. NW. Washington DC 20005 airborne will find Hooptee built according plans extremely stable flies easily response con trol may appear somewhat sluggish intended way Too often heat race 150 mph pilot will take eyes off model watch pit crew signals glance other model race hell crash plane cause too sensitive control effort help potentialnew fliers get involved rat race following list whereto get specialty items will find items quite available will help immensely getting started have personally dealt sources can honestly recommend also feature good mail order facilities W-K Hobbies 19 N Main Centerville Ohio 45459 513 433-0752 Fiberglass tops rat tanks fiberglass props fuel shut offs wheels other hobby items Aldrich Products Inc PO Box 1426 Mission Tex 78572 512 585-7681 En gine rework fuel glow plugs chrome plating Joes Hobby Centers Inc 7845 Wyo ming Ave Dearborn Mich 48126 313 9336567 Bartels Props Ucon & Klotz Oil premixed fuel Dons products other standard hobby items Fusite Division Emerson Electric Com pany 6000 Fernview Ave Cincinnati Ohio 45212 513731-2020 Gb -Bee Plugs Randys Model Aeronautics 515 Cole man Blvd Mount Pleasant SC 29464 803884-7411 Fuels distributor Dons Products other hobbr Items ADVERTISERS INDEX Ace Radio Control Inc I Andrews Aircraft Model Co 67 AMAPR 75 Bantam Precision Products Inc leveland Model & Supply Co 73 Coverite 73 Du-Bro Products Inc 69 EK-logictrol77 Carl Goldberg Models 3 Grish Brothers 71 G-S Products Corp Intl 70 Harrys Hobbies Inc 78 JR Sales Company 75 Midwest Products Company66 Models West Inc79 Peck-Polymers76 Polks Hobbies74 Rare Birds73 Satellite City71 Sig Mfg Company25 SPSystems68 Sterling Models Inc68 Sullivan Products Inc72 Superscale79 TeleCraft72 VI Products76 Williams Brothers71 World EnginesBack Cover 80 Modet Aviation
Edition: Model Aviation - 1976/01
Page Numbers: 28, 29, 30, 31, 79, 80
RAT RACING has evolved good beginners event probably competitive control-line event its 20 some years existence old days form aircraft acceptable long would take off land winner usually could successfully restart engine couple times race things have changed recent years state-of-the-art has up graded both through technological im provements engines also flying techniques improvements have proven demise event Participation especially new people practically non-existent feel lack participation new blood directly attributable two areas lack available information lack pilots intent article make available potential new comer details get started event Hooptee MK III Model presented article typical modern rat racers represents third basic design change have made rat racer designs past 12 years have using design three years has such consistent performer other top competitors Midwest area now using also include Bill Allen John Ballard Gary Fentress Bob Finely Pat Flinn quite easy construct once have gone through exercise time two first time through may scare bit due un usual construction technique namely fiberglass top future models will become quite easy confidence improves HOOPTE*B MKIIL updde c ro racing John F Kilsdonk first step select engine As writing HP-40 RRV engine popular However enough work being put OS-405R some day should least rank equal better HP Other 40-size engines avail able however passes both qualities absolutely necessary good rat engine high performance fast re start capability Whatever engine select start should fitted Midwest former ly Harters pinto speed pan can obtained through good hobby shop pan will require some grinding mount engine modifications pan should kept minimum structually weaken engine mounted using 4-40 X s requires drilling tapping pan after locating engine next step install landing gear single wheel landing gear shown plans has proven very popular because its ease installation extreme durability An 1/8 hole drilled through inboard side dimple location pan Another /8 hole drilled approximately 1 rear wing mounting boss pan Select 15 18 length of/g piano wire make two right angle bends same plane approximately middle piece center distance bends should correspond exactly center distance two landing gear holes Both holes drilled pan should radiused top accept radius piano wire bends Slip piano wire through two holes lightly tap place until well seated point Above Basic components prior assembly Below Finished wing engine/pen assembly fiberglass fuselage top has cut out match engine wing Leadout tubes covered basswood strips wing tip weight place its special cut-Out 28 Model Aviation take rearward wire bend forward close pan possible make another bend parallel right against back front wire Take length rass tubing gently flatten ID cross-section vise Slip over two pieces piano wire lightly tap position Mark rear wire bottom edge brass tubing Remove tubing cut-off rear wire mark Reinstall tubing bend whole assembly forward wheel axle will approximately 2 inches front front wire exits pan Measure engine mounting surface pan down 4 inches loca tion wheel axle Bend forward /8 piano wire inboard side 900 angle parallel future wing centerline Install l/8 Dons wheel soldering No 4 flat washer both sides trim off excess wire use wheel collars hold wheel tend vibrate loose Next step install fuel shut-off pan located directly behind engine Leave enough clearance fuel lines pass through use W-K shut-off find sim plest effective using shut-off may find can get closer engine notching out extra fuel line clearance Next install fuel tank Either Dons 4 oz rat tank W-K rat tank will work very well Personally use combination both tanks cut off front section Dons tank solder W-K tank gives about apacity 4 oz tank adequate 60-70 laps engines However security pre fer extra apacity fuel tank should securely mounted pan using 020 brass angle brackets soldered both front rear tank held place 4-40 bolts through pan tail skid necessary although will save some wear tear lot top competitors use however prefer use 3/32 piano wire version formed bolt pan preceding steps should complete pan installation except two items prefer round off front end pan conform contour shown plans very simple utilizing disk sander l motor top wing assembly stabilizer assembly bolted pan will done later wing material should selected light basswood select ponderosa pine pinch have used board shipping crate wood should planed sanded 5/16 thickness 5/16 X 4 X 28 blank required Cut out plan form wing configu rapid advances Rat Racing discourage newcomers state-of-the-art article presents valuable unpublicized information ration shown plans leadout tube grooves can cut using little care X-acto gouge easy way use router bought Sears standard router about $3000 sure saves time gives much cleaner finished product using hand gouge grooves need /8 wide /8 deep use router cut grooves 5/32 deep using 1/8 dia blade mill 1/32 X groove top allows 1/32 X wood cap available model railroad supply stores Whichever tube installation method used /8 aluminum tubes should held place small amount fiberglass polyester resin basswood caps installed using same material caps used fill balance grooves plastic balsa surfacing resin mixed micro-balloons outboard wing weight must consistent performance especially windy days Gougeor use routera pocket /8 deep X 1 long X shown near outboard wing tip filled lead solder either two ways can hammer length bar solder /8 thickness cut out piece fit pocket can melting solder dripping pocket Drill about January 1976 29 Wing assembled fiberglass topnote fillets wing joint Engine fuel tank mounted pan Either Dons 4-oz rat tank W-K rat tank work equally wellusually 60-70 laps Complete assembly prior painting Note fuel shut-off just rear needle valve An alter nate top construction shown plan Balsa basswood just take time IIOOPTEE MIcII 0CONTROLEE RAT RACER DeIg9d dDrorw hj Jaw KLSDOAW 0 e BASS WOOD BALSA 7~ MACHINED RECESS ALUMINUM TUBING V32I/4 BASSWOOD LEADOUT DETAILS 4 —X-recrZt~N~t REINFORCE COWL WITH FIBREGLASS ALTERNATE TOP CONSTRUCTION I/35 LEADOUTS LB ALUM TUBING IMBEDDED IN BOTTOM OF WINGVtB32111/2BOLTS .............................. ][b-1-10-1-10]] -iIIit IOPTIONAL FILLETS BASSWOOO-WING YOUR AMA NUMBER IREQO 012345B Inches S BELLCRANK W-K Ho091eMOLOED FIBREGLASS TOP B-32 I-I/V BOLT ID BRASS TUBING SLEEVE ITYP V16 PIANO WIRE WING TIP SJ B B OPEN - ----E3 CLOSED V FABRICATE CONTROL I4ORN FROM VIB PIANO WIRE WRAP WITH SOFT WIRE ANO SOLDER REL S4UT-OFF DETAIL ilNx -N 3/4 OZ COOLING OIJTLET\1/4OS 4OSR OR EQUIVI COOLING BlAT 77/VDIANETER BANTELS PROP OR EGUlVJ MIDWEST PROTO PAN s 6i/4 c 7-\I1 WIRE L G WITH I/BPIANOI5/B DONS WHEEL -FLATTENED V410 BRASS TUBING SLEEVE THREADED H NGES Ca 0 Hooptee MK III six eight holes through weight cross-wise wood about 1/8 deep Remove weight apply generous amount resin pocket Reinstall weight clamp position resin will ooze out holes provide good mechanical bond can also covered patch fiberglass cloth reinforcement resin has set up use sanding block sand both leadout tube area wing weight area bring back perfectly flat plane Turn wing over carve airfoil using small block plane Take time step gouge wood leaving scar cannot sanded out airfoil should conform crosssections shown plans Finish up various grits sandpaper ending up about 200 grit Now part thats probably got scared the upper fuselage top can purchased W-K Hobbies actually quite easy work So dont panic Calmly take top po sition next pan engine sembly Mark off approximate posi tion glow plug engine Drill eter hole position Now carefully file use Dremel tool gradually increase diameter hole until about /8 diameter smaller cylinder head Place top over engine pan occasionally check ing location Now mark off cut-outs engine lugs shut off cut out appropriate notches Now slowly continue open up cylinder head hole until fits exactly way want try use about 1/32 clearance around head Now mark off cut out exhaust opening cooling vent inlet outlet shown plans Locate position wing leading edge top scribe lines e bottom top leading edge location rearward 4 Make paper template wing cross-section center chord position Scribe form both sides fiber glass top using flat scribed lines leading edge locaters Now drill /s hole somewhere near center begin file use Dremel cut openings scribed lines get close try insert wing keep reworking openings until wing will just slip position Now go back wing Take 2 Veco now & L bellcrank bend leadout tabs down 300 angle Using gouge router cut appropriate grooves allow bellcrank swing through 600 arc Drill 9/64 hole through wing bellcrank bolt insert 6-32 blind nut through top Above Top view model after three years flyingnote thread-sewn hinges Right Pushrod belicrank detailnote alligator clip finger contact Bottom Wing tip skid installa donnecessary one-wheel main gear Prop fiberglass fuel 50 70% nitromethane wing epoxy place Remove bellcrank slip wing back position Extreme care must taken assure wing parallel bottom top perpendicular fuselage centerline exact fore aft position shown plans 2/s engine cylinder center Now use 5-minute epoxy glue wing position nerves havent failed now youre set An alternate top construction also shown plan care old fashioned way balsa bass wood construction just functional takes time stabilizer should quite straight forward Use good quality basswood use plywood stab carved same way wing should have flat-bottom airfoil shown prefer home-made control horn shown plans can sub stitute commercial Veco & L other version horn shown plans can easily fabricated using 1/16 piano wire vise little care stab mounted pan using 4-40 X s through bottom pan 4-40 blind nuts through top stab stab should hinged until after painting although prefer drill hinge thread holes prior painting desire good quality RC nylon hinges can substituted thread version Provide hole fiberglass top fuel tank fill cut out slots ihe continued page 79 January 1976 31 new LEADER 500 class sport pylon racing & fun flys FEATURES _____MACHINED BALSA PARTS _____COMPLETE HARDWARE PAC FULL SIZE PLANS AL LANDING GEAR THEPRE-LAM BITSFUSE SIDES CONSTRUCTION PHOTOS mASSY INSTRUCTIONS 0c 3995ius postage dealer inquiries invited ri i5MADISON LJJest PH 602275-8653 Throughout past Contest season have received fine pictures over country Modelers coming up some really outstanding scale models think Stand off Scale has shot arm stimulate imagination modeler wants bird look like full-size aircraft such model J F Alexanders Abilene Texas P-38-the forked-tail devil Japanese WW II called P-38 very distinctive model flying easily recog nizable J Es P-38 unique hand made molds its fiberglass also hand-made own retracts things tires pride joy have seen fine P-38 fly real tribute P-38 Lightning WW II fame Jerry Farr Abilene responsible fine picture sent Bob Strobel Detroit Mich sent very unusual picture ME 262 WW II Ger man jet fighter Bob reports 262 flies fast stable ST 60 all-wood construc tion light 75 lbs Im sure Stand-off Scale 262 would impressive air have also looked long hard several jet aircraft would really adapt Stand-off Scale nothing rules AMA Stand-off Scale rules forbid jet subjects conven tional powerplants remember several years ago World FAI Scale Champion ship won ME 163 Komet rocket motor-powered flying wing aircraft WW II model powered standard model engine same Bobs 262 So some digging see some early jets would make good scale model Also remember day ducted fan almost reality powering scale models Old friend Dave Platt pioneering type powerplant scale models Till next time keep fine black white pictures coming hope use possible address 734 North 6th St Terrace Blue Springs Mo 64015 Hooptee MK III/Kilsdonk continued page 31 stabilizer top location shown can add fillets around wing joint using either plastic balsa micro-bal loons sanding desired contour should also dam up upper fuselage area above wing using either materials will prevent fuel splashing area Now have locate again top pan drill 7/64 hole through top wing assembly through pan indicated positions front hold-down screws Similarly rear top rear hold-down position After drilling 7/64 holes through pan tap three holes 6-32 tap Enlarge 7/64 holes drilled through top 3/16 cut off lengths 3/16 OD X 5/32 ID brass tubing about 11/4 long tubing pushed through holes top top installed pan Run three 6-32 X 2 bolts through brass tubing thread pan Draw three bolts down tight making sure brass tubing seated against pan Now take masking tape rubber bands securely clamp top pan point brass tubing inserts should extending well above top Apply small amount 5-minute epoxy tube top surface will hold tubing its proper position tape rubber bands removed After epoxy set remove top turn over Additional heavy amounts epoxy should applied inside top securely hold tubing place lay /2 strip heavy fiberglass tape over tubes under wing cement well top additional reinforcement can use either epoxy polyester resin cement tape place securely hold tube rear dam up area about 1/4 front tube modeling clay works great pour mixture micro-bal loons resin sets-up can easily sanded flat remove clay before sanding excess tubing original epoxy top side trimmed off use ted end-mill drill press however counter sink Dremel can also used effectively finish have found easiest durable apply two coats surfacing polyester resin wood surfaces fillets sanding generously after coat Also fiberglass top must sanded lightly remove mold release agent present apply Hobby poxy K&B epoxy usually two coats wet sand 400 wet dry sand paper Apply decals desired finish up coat clear epoxy over everything stab must now hinged re-drill hinge holes remove accu mulated resin paint sew hinge using flying line heavy carpet thread Mount 030 brass hot wire pad cowl connect short length #16 wire run through cowl up through top install mini-al ligator clip forms leg pit battery connection pan grounded engine forms other leg brass plate should located comfortable convenient pit man Install bellcrank leadout wires prefer 1/32 piano wire leadouts ever flexible cable 125# test fine also Use small drop Locktite bellcrank mounting screw prevent coming loose use wing tip skid outboard wing Although entirely necessary like tail skid saves lot wear tear tip skid formed 1/16 piano wire held place using 4-40 bolt blind-mounting nut Actually prefer solder small 020 brass plate utilize two such screws hold place Mount stab using 4-40 x 3/4 January 1976 79 aIF7FA5LAL E WWII SCALE AIRCRAFT PLANS Send $100 Catalogue Containing copy Superscale drawing Superscale Box 201 Arlington Texas 76012 Hooptee MK Ill continued bolts blind mounting nuts run 1/16 pushrod outside hole belicrank control horn stab will have experiment different lengths wire get proper movement like 450 up 300 down controls operating prop erly small pushrod must fabricated trip fuel shut-off Again use short length / 16 piano wire connect ed inside hole belicrank runs through small angle bracket mount ed inside cowl Experiment length until fuel shut-off will trip just prior full down elevator Now mount top pan youre ready test fly prefer fiberglass prop pitched accord ing details plans Use fuel 50% 70% nitromethane good quality lubricant Several new glow plugs now available Preliminary tests have indicated Gb-Bee Fusite Div Emerson Elec has best dura bility should experiment differ ent props fuels glow plugs deter what suits best take-off mandatory maintain neutral elevator until model FULL-SIZE PLANS No 123 4-Bits 40-powered RC Quickie 500 has winning ways Good sport too No 124 Semi-Pro Contest-winning HLglider has pop-up tail dethermalizer No 125 HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Timer No 126 Hooptee MK III John Kilsdonks CL Rat Racer involves latest state-of-the art No 100Hinnants F-5$450 ultimate maneuverability smoothness 60 Pattern job has No101Short Seamew $300 40-powered class carrier model good prototype lends itself innovations No 102French Wench $225 Free Flight classes 1/2A 049 051a fully tested design No 103Kloud King $400 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF No 104Wiley Post Biplane $225 Petite durable scale design either rubber tail wagger pulse rudder No 105Harold Ruarks Sportsman $450 dream RC cabin iob pretty smooth lines 40 powered full-house No 106Vought Kingfisher $450 semi-scale fully stuntable control Line model Len King IFor 25 35 engines No 107Aeronca K $200 24 wingspan ubber Indoor Scale oldtime lightplane Its done 90 seconds No108Electrgc $375 Couldnt done Dick Sarpolus Astro 25 RC job performs pattern No 109Bill Fuoris Quarter Midget $300 Developed House Balsa design modifications faster times No110The Zipper $175 latest CL Scale Racers John Kils donk job isa must racing fans No111MaxA-Million $375 fleet free flights problem good A/B FAI $400 $100 $175 $175 No 1125neat$275 Sport RC glider simple job can flown engine No113Cessna 150 Aerobat$275 Step up Half-A CL jobs 09-powered semi-profile easy build fly No 114Ernie Violetts DH Comet$900 CL Scale 1974 Nuts first-place winner twin flies beautifully No115Niris$400 An RC pattern job takes advan tage best esisting criteria No116Electro-Lite$150 Hal Covers contest-type free flight VTOs Hytork electric motor No117Novice$150 simple beginners A-t Nordic con structed entirely sheet balsa No 118 GollyGeeWhiz$150 Dan Rutherfords simple Half-A powered Combat job turns dime No119 Four Beginners Too$300 basic RC trainer 09 15s rudder elevator motor controls No 120 Cathexis$450 Dave Parsonr FAI FF has auto-elevator rudder prop brake No 121 Gremlin$300 Sturdy aerobatic RC biplane flies well 35s up 60s No122 HotWood$100 Twice Nats winner Rocket allbalsa Jetes-powered job Circle numbers plans wish order 100 101102103 107108 114115 104 105 106 109110111112113 116117118119 121122123 Enclosed $ 124 120 125126 Please print carefully NAME STREET CITY STATE 71 P Price includes first-class postage Send check money order payable Model Aviation AMA 806 Fifteenth St. NW. Washington DC 20005 airborne will find Hooptee built according plans extremely stable flies easily response con trol may appear somewhat sluggish intended way Too often heat race 150 mph pilot will take eyes off model watch pit crew signals glance other model race hell crash plane cause too sensitive control effort help potentialnew fliers get involved rat race following list whereto get specialty items will find items quite available will help immensely getting started have personally dealt sources can honestly recommend also feature good mail order facilities W-K Hobbies 19 N Main Centerville Ohio 45459 513 433-0752 Fiberglass tops rat tanks fiberglass props fuel shut offs wheels other hobby items Aldrich Products Inc PO Box 1426 Mission Tex 78572 512 585-7681 En gine rework fuel glow plugs chrome plating Joes Hobby Centers Inc 7845 Wyo ming Ave Dearborn Mich 48126 313 9336567 Bartels Props Ucon & Klotz Oil premixed fuel Dons products other standard hobby items Fusite Division Emerson Electric Com pany 6000 Fernview Ave Cincinnati Ohio 45212 513731-2020 Gb -Bee Plugs Randys Model Aeronautics 515 Cole man Blvd Mount Pleasant SC 29464 803884-7411 Fuels distributor Dons Products other hobbr Items ADVERTISERS INDEX Ace Radio Control Inc I Andrews Aircraft Model Co 67 AMAPR 75 Bantam Precision Products Inc leveland Model & Supply Co 73 Coverite 73 Du-Bro Products Inc 69 EK-logictrol77 Carl Goldberg Models 3 Grish Brothers 71 G-S Products Corp Intl 70 Harrys Hobbies Inc 78 JR Sales Company 75 Midwest Products Company66 Models West Inc79 Peck-Polymers76 Polks Hobbies74 Rare Birds73 Satellite City71 Sig Mfg Company25 SPSystems68 Sterling Models Inc68 Sullivan Products Inc72 Superscale79 TeleCraft72 VI Products76 Williams Brothers71 World EnginesBack Cover 80 Modet Aviation
Edition: Model Aviation - 1976/01
Page Numbers: 28, 29, 30, 31, 79, 80
RAT RACING has evolved good beginners event probably competitive control-line event its 20 some years existence old days form aircraft acceptable long would take off land winner usually could successfully restart engine couple times race things have changed recent years state-of-the-art has up graded both through technological im provements engines also flying techniques improvements have proven demise event Participation especially new people practically non-existent feel lack participation new blood directly attributable two areas lack available information lack pilots intent article make available potential new comer details get started event Hooptee MK III Model presented article typical modern rat racers represents third basic design change have made rat racer designs past 12 years have using design three years has such consistent performer other top competitors Midwest area now using also include Bill Allen John Ballard Gary Fentress Bob Finely Pat Flinn quite easy construct once have gone through exercise time two first time through may scare bit due un usual construction technique namely fiberglass top future models will become quite easy confidence improves HOOPTE*B MKIIL updde c ro racing John F Kilsdonk first step select engine As writing HP-40 RRV engine popular However enough work being put OS-405R some day should least rank equal better HP Other 40-size engines avail able however passes both qualities absolutely necessary good rat engine high performance fast re start capability Whatever engine select start should fitted Midwest former ly Harters pinto speed pan can obtained through good hobby shop pan will require some grinding mount engine modifications pan should kept minimum structually weaken engine mounted using 4-40 X s requires drilling tapping pan after locating engine next step install landing gear single wheel landing gear shown plans has proven very popular because its ease installation extreme durability An 1/8 hole drilled through inboard side dimple location pan Another /8 hole drilled approximately 1 rear wing mounting boss pan Select 15 18 length of/g piano wire make two right angle bends same plane approximately middle piece center distance bends should correspond exactly center distance two landing gear holes Both holes drilled pan should radiused top accept radius piano wire bends Slip piano wire through two holes lightly tap place until well seated point Above Basic components prior assembly Below Finished wing engine/pen assembly fiberglass fuselage top has cut out match engine wing Leadout tubes covered basswood strips wing tip weight place its special cut-Out 28 Model Aviation take rearward wire bend forward close pan possible make another bend parallel right against back front wire Take length rass tubing gently flatten ID cross-section vise Slip over two pieces piano wire lightly tap position Mark rear wire bottom edge brass tubing Remove tubing cut-off rear wire mark Reinstall tubing bend whole assembly forward wheel axle will approximately 2 inches front front wire exits pan Measure engine mounting surface pan down 4 inches loca tion wheel axle Bend forward /8 piano wire inboard side 900 angle parallel future wing centerline Install l/8 Dons wheel soldering No 4 flat washer both sides trim off excess wire use wheel collars hold wheel tend vibrate loose Next step install fuel shut-off pan located directly behind engine Leave enough clearance fuel lines pass through use W-K shut-off find sim plest effective using shut-off may find can get closer engine notching out extra fuel line clearance Next install fuel tank Either Dons 4 oz rat tank W-K rat tank will work very well Personally use combination both tanks cut off front section Dons tank solder W-K tank gives about apacity 4 oz tank adequate 60-70 laps engines However security pre fer extra apacity fuel tank should securely mounted pan using 020 brass angle brackets soldered both front rear tank held place 4-40 bolts through pan tail skid necessary although will save some wear tear lot top competitors use however prefer use 3/32 piano wire version formed bolt pan preceding steps should complete pan installation except two items prefer round off front end pan conform contour shown plans very simple utilizing disk sander l motor top wing assembly stabilizer assembly bolted pan will done later wing material should selected light basswood select ponderosa pine pinch have used board shipping crate wood should planed sanded 5/16 thickness 5/16 X 4 X 28 blank required Cut out plan form wing configu rapid advances Rat Racing discourage newcomers state-of-the-art article presents valuable unpublicized information ration shown plans leadout tube grooves can cut using little care X-acto gouge easy way use router bought Sears standard router about $3000 sure saves time gives much cleaner finished product using hand gouge grooves need /8 wide /8 deep use router cut grooves 5/32 deep using 1/8 dia blade mill 1/32 X groove top allows 1/32 X wood cap available model railroad supply stores Whichever tube installation method used /8 aluminum tubes should held place small amount fiberglass polyester resin basswood caps installed using same material caps used fill balance grooves plastic balsa surfacing resin mixed micro-balloons outboard wing weight must consistent performance especially windy days Gougeor use routera pocket /8 deep X 1 long X shown near outboard wing tip filled lead solder either two ways can hammer length bar solder /8 thickness cut out piece fit pocket can melting solder dripping pocket Drill about January 1976 29 Wing assembled fiberglass topnote fillets wing joint Engine fuel tank mounted pan Either Dons 4-oz rat tank W-K rat tank work equally wellusually 60-70 laps Complete assembly prior painting Note fuel shut-off just rear needle valve An alter nate top construction shown plan Balsa basswood just take time IIOOPTEE MIcII 0CONTROLEE RAT RACER DeIg9d dDrorw hj Jaw KLSDOAW 0 e BASS WOOD BALSA 7~ MACHINED RECESS ALUMINUM TUBING V32I/4 BASSWOOD LEADOUT DETAILS 4 —X-recrZt~N~t REINFORCE COWL WITH FIBREGLASS ALTERNATE TOP CONSTRUCTION I/35 LEADOUTS LB ALUM TUBING IMBEDDED IN BOTTOM OF WINGVtB32111/2BOLTS .............................. ][b-1-10-1-10]] -iIIit IOPTIONAL FILLETS BASSWOOO-WING YOUR AMA NUMBER IREQO 012345B Inches S BELLCRANK W-K Ho091eMOLOED FIBREGLASS TOP B-32 I-I/V BOLT ID BRASS TUBING SLEEVE ITYP V16 PIANO WIRE WING TIP SJ B B OPEN - ----E3 CLOSED V FABRICATE CONTROL I4ORN FROM VIB PIANO WIRE WRAP WITH SOFT WIRE ANO SOLDER REL S4UT-OFF DETAIL ilNx -N 3/4 OZ COOLING OIJTLET\1/4OS 4OSR OR EQUIVI COOLING BlAT 77/VDIANETER BANTELS PROP OR EGUlVJ MIDWEST PROTO PAN s 6i/4 c 7-\I1 WIRE L G WITH I/BPIANOI5/B DONS WHEEL -FLATTENED V410 BRASS TUBING SLEEVE THREADED H NGES Ca 0 Hooptee MK III six eight holes through weight cross-wise wood about 1/8 deep Remove weight apply generous amount resin pocket Reinstall weight clamp position resin will ooze out holes provide good mechanical bond can also covered patch fiberglass cloth reinforcement resin has set up use sanding block sand both leadout tube area wing weight area bring back perfectly flat plane Turn wing over carve airfoil using small block plane Take time step gouge wood leaving scar cannot sanded out airfoil should conform crosssections shown plans Finish up various grits sandpaper ending up about 200 grit Now part thats probably got scared the upper fuselage top can purchased W-K Hobbies actually quite easy work So dont panic Calmly take top po sition next pan engine sembly Mark off approximate posi tion glow plug engine Drill eter hole position Now carefully file use Dremel tool gradually increase diameter hole until about /8 diameter smaller cylinder head Place top over engine pan occasionally check ing location Now mark off cut-outs engine lugs shut off cut out appropriate notches Now slowly continue open up cylinder head hole until fits exactly way want try use about 1/32 clearance around head Now mark off cut out exhaust opening cooling vent inlet outlet shown plans Locate position wing leading edge top scribe lines e bottom top leading edge location rearward 4 Make paper template wing cross-section center chord position Scribe form both sides fiber glass top using flat scribed lines leading edge locaters Now drill /s hole somewhere near center begin file use Dremel cut openings scribed lines get close try insert wing keep reworking openings until wing will just slip position Now go back wing Take 2 Veco now & L bellcrank bend leadout tabs down 300 angle Using gouge router cut appropriate grooves allow bellcrank swing through 600 arc Drill 9/64 hole through wing bellcrank bolt insert 6-32 blind nut through top Above Top view model after three years flyingnote thread-sewn hinges Right Pushrod belicrank detailnote alligator clip finger contact Bottom Wing tip skid installa donnecessary one-wheel main gear Prop fiberglass fuel 50 70% nitromethane wing epoxy place Remove bellcrank slip wing back position Extreme care must taken assure wing parallel bottom top perpendicular fuselage centerline exact fore aft position shown plans 2/s engine cylinder center Now use 5-minute epoxy glue wing position nerves havent failed now youre set An alternate top construction also shown plan care old fashioned way balsa bass wood construction just functional takes time stabilizer should quite straight forward Use good quality basswood use plywood stab carved same way wing should have flat-bottom airfoil shown prefer home-made control horn shown plans can sub stitute commercial Veco & L other version horn shown plans can easily fabricated using 1/16 piano wire vise little care stab mounted pan using 4-40 X s through bottom pan 4-40 blind nuts through top stab stab should hinged until after painting although prefer drill hinge thread holes prior painting desire good quality RC nylon hinges can substituted thread version Provide hole fiberglass top fuel tank fill cut out slots ihe continued page 79 January 1976 31 new LEADER 500 class sport pylon racing & fun flys FEATURES _____MACHINED BALSA PARTS _____COMPLETE HARDWARE PAC FULL SIZE PLANS AL LANDING GEAR THEPRE-LAM BITSFUSE SIDES CONSTRUCTION PHOTOS mASSY INSTRUCTIONS 0c 3995ius postage dealer inquiries invited ri i5MADISON LJJest PH 602275-8653 Throughout past Contest season have received fine pictures over country Modelers coming up some really outstanding scale models think Stand off Scale has shot arm stimulate imagination modeler wants bird look like full-size aircraft such model J F Alexanders Abilene Texas P-38-the forked-tail devil Japanese WW II called P-38 very distinctive model flying easily recog nizable J Es P-38 unique hand made molds its fiberglass also hand-made own retracts things tires pride joy have seen fine P-38 fly real tribute P-38 Lightning WW II fame Jerry Farr Abilene responsible fine picture sent Bob Strobel Detroit Mich sent very unusual picture ME 262 WW II Ger man jet fighter Bob reports 262 flies fast stable ST 60 all-wood construc tion light 75 lbs Im sure Stand-off Scale 262 would impressive air have also looked long hard several jet aircraft would really adapt Stand-off Scale nothing rules AMA Stand-off Scale rules forbid jet subjects conven tional powerplants remember several years ago World FAI Scale Champion ship won ME 163 Komet rocket motor-powered flying wing aircraft WW II model powered standard model engine same Bobs 262 So some digging see some early jets would make good scale model Also remember day ducted fan almost reality powering scale models Old friend Dave Platt pioneering type powerplant scale models Till next time keep fine black white pictures coming hope use possible address 734 North 6th St Terrace Blue Springs Mo 64015 Hooptee MK III/Kilsdonk continued page 31 stabilizer top location shown can add fillets around wing joint using either plastic balsa micro-bal loons sanding desired contour should also dam up upper fuselage area above wing using either materials will prevent fuel splashing area Now have locate again top pan drill 7/64 hole through top wing assembly through pan indicated positions front hold-down screws Similarly rear top rear hold-down position After drilling 7/64 holes through pan tap three holes 6-32 tap Enlarge 7/64 holes drilled through top 3/16 cut off lengths 3/16 OD X 5/32 ID brass tubing about 11/4 long tubing pushed through holes top top installed pan Run three 6-32 X 2 bolts through brass tubing thread pan Draw three bolts down tight making sure brass tubing seated against pan Now take masking tape rubber bands securely clamp top pan point brass tubing inserts should extending well above top Apply small amount 5-minute epoxy tube top surface will hold tubing its proper position tape rubber bands removed After epoxy set remove top turn over Additional heavy amounts epoxy should applied inside top securely hold tubing place lay /2 strip heavy fiberglass tape over tubes under wing cement well top additional reinforcement can use either epoxy polyester resin cement tape place securely hold tube rear dam up area about 1/4 front tube modeling clay works great pour mixture micro-bal loons resin sets-up can easily sanded flat remove clay before sanding excess tubing original epoxy top side trimmed off use ted end-mill drill press however counter sink Dremel can also used effectively finish have found easiest durable apply two coats surfacing polyester resin wood surfaces fillets sanding generously after coat Also fiberglass top must sanded lightly remove mold release agent present apply Hobby poxy K&B epoxy usually two coats wet sand 400 wet dry sand paper Apply decals desired finish up coat clear epoxy over everything stab must now hinged re-drill hinge holes remove accu mulated resin paint sew hinge using flying line heavy carpet thread Mount 030 brass hot wire pad cowl connect short length #16 wire run through cowl up through top install mini-al ligator clip forms leg pit battery connection pan grounded engine forms other leg brass plate should located comfortable convenient pit man Install bellcrank leadout wires prefer 1/32 piano wire leadouts ever flexible cable 125# test fine also Use small drop Locktite bellcrank mounting screw prevent coming loose use wing tip skid outboard wing Although entirely necessary like tail skid saves lot wear tear tip skid formed 1/16 piano wire held place using 4-40 bolt blind-mounting nut Actually prefer solder small 020 brass plate utilize two such screws hold place Mount stab using 4-40 x 3/4 January 1976 79 aIF7FA5LAL E WWII SCALE AIRCRAFT PLANS Send $100 Catalogue Containing copy Superscale drawing Superscale Box 201 Arlington Texas 76012 Hooptee MK Ill continued bolts blind mounting nuts run 1/16 pushrod outside hole belicrank control horn stab will have experiment different lengths wire get proper movement like 450 up 300 down controls operating prop erly small pushrod must fabricated trip fuel shut-off Again use short length / 16 piano wire connect ed inside hole belicrank runs through small angle bracket mount ed inside cowl Experiment length until fuel shut-off will trip just prior full down elevator Now mount top pan youre ready test fly prefer fiberglass prop pitched accord ing details plans Use fuel 50% 70% nitromethane good quality lubricant Several new glow plugs now available Preliminary tests have indicated Gb-Bee Fusite Div Emerson Elec has best dura bility should experiment differ ent props fuels glow plugs deter what suits best take-off mandatory maintain neutral elevator until model FULL-SIZE PLANS No 123 4-Bits 40-powered RC Quickie 500 has winning ways Good sport too No 124 Semi-Pro Contest-winning HLglider has pop-up tail dethermalizer No 125 HaIf-Korda rubber John Oldenkamps 1/2-size all-balsa Old-Timer No 126 Hooptee MK III John Kilsdonks CL Rat Racer involves latest state-of-the art No 100Hinnants F-5$450 ultimate maneuverability smoothness 60 Pattern job has No101Short Seamew $300 40-powered class carrier model good prototype lends itself innovations No 102French Wench $225 Free Flight classes 1/2A 049 051a fully tested design No 103Kloud King $400 15- 19 RC Old-Timer Free Flight based upon 1938 record breaker FF No 104Wiley Post Biplane $225 Petite durable scale design either rubber tail wagger pulse rudder No 105Harold Ruarks Sportsman $450 dream RC cabin iob pretty smooth lines 40 powered full-house No 106Vought Kingfisher $450 semi-scale fully stuntable control Line model Len King IFor 25 35 engines No 107Aeronca K $200 24 wingspan ubber Indoor Scale oldtime lightplane Its done 90 seconds No108Electrgc $375 Couldnt done Dick Sarpolus Astro 25 RC job performs pattern No 109Bill Fuoris Quarter Midget $300 Developed House Balsa design modifications faster times No110The Zipper $175 latest CL Scale Racers John Kils donk job isa must racing fans No111MaxA-Million $375 fleet free flights problem good A/B FAI $400 $100 $175 $175 No 1125neat$275 Sport RC glider simple job can flown engine No113Cessna 150 Aerobat$275 Step up Half-A CL jobs 09-powered semi-profile easy build fly No 114Ernie Violetts DH Comet$900 CL Scale 1974 Nuts first-place winner twin flies beautifully No115Niris$400 An RC pattern job takes advan tage best esisting criteria No116Electro-Lite$150 Hal Covers contest-type free flight VTOs Hytork electric motor No117Novice$150 simple beginners A-t Nordic con structed entirely sheet balsa No 118 GollyGeeWhiz$150 Dan Rutherfords simple Half-A powered Combat job turns dime No119 Four Beginners Too$300 basic RC trainer 09 15s rudder elevator motor controls No 120 Cathexis$450 Dave Parsonr FAI FF has auto-elevator rudder prop brake No 121 Gremlin$300 Sturdy aerobatic RC biplane flies well 35s up 60s No122 HotWood$100 Twice Nats winner Rocket allbalsa Jetes-powered job Circle numbers plans wish order 100 101102103 107108 114115 104 105 106 109110111112113 116117118119 121122123 Enclosed $ 124 120 125126 Please print carefully NAME STREET CITY STATE 71 P Price includes first-class postage Send check money order payable Model Aviation AMA 806 Fifteenth St. NW. Washington DC 20005 airborne will find Hooptee built according plans extremely stable flies easily response con trol may appear somewhat sluggish intended way Too often heat race 150 mph pilot will take eyes off model watch pit crew signals glance other model race hell crash plane cause too sensitive control effort help potentialnew fliers get involved rat race following list whereto get specialty items will find items quite available will help immensely getting started have personally dealt sources can honestly recommend also feature good mail order facilities W-K Hobbies 19 N Main Centerville Ohio 45459 513 433-0752 Fiberglass tops rat tanks fiberglass props fuel shut offs wheels other hobby items Aldrich Products Inc PO Box 1426 Mission Tex 78572 512 585-7681 En gine rework fuel glow plugs chrome plating Joes Hobby Centers Inc 7845 Wyo ming Ave Dearborn Mich 48126 313 9336567 Bartels Props Ucon & Klotz Oil premixed fuel Dons products other standard hobby items Fusite Division Emerson Electric Com pany 6000 Fernview Ave Cincinnati Ohio 45212 513731-2020 Gb -Bee Plugs Randys Model Aeronautics 515 Cole man Blvd Mount Pleasant SC 29464 803884-7411 Fuels distributor Dons Products other hobbr Items ADVERTISERS INDEX Ace Radio Control Inc I Andrews Aircraft Model Co 67 AMAPR 75 Bantam Precision Products Inc leveland Model & Supply Co 73 Coverite 73 Du-Bro Products Inc 69 EK-logictrol77 Carl Goldberg Models 3 Grish Brothers 71 G-S Products Corp Intl 70 Harrys Hobbies Inc 78 JR Sales Company 75 Midwest Products Company66 Models West Inc79 Peck-Polymers76 Polks Hobbies74 Rare Birds73 Satellite City71 Sig Mfg Company25 SPSystems68 Sterling Models Inc68 Sullivan Products Inc72 Superscale79 TeleCraft72 VI Products76 Williams Brothers71 World EnginesBack Cover 80 Modet Aviation