THIS IS definitely pretty model wasnt meant designed Thing amabob few simple goals mind model should very easy build rel atively inexpensive fly reasonably well also wanted airplane could flown number different configura tions Though wont fly FAI RC Aerobat ics pattern Thingamabob meets goals Its Dick Jane model will help beginner learn fly vesting large amounts time money project same time building airplanes will teach some basic con struction skills mind important consideration variety almost-ready-to-fly models readily avail able logic suggests individual has genuine interest hobby/sport aero modeling somewhere down road will need know build sides anytime invest something self just money project takes far importance meaning Thingamabob should noted no great marvel engineering wing airfoil example created LAR looks about right system People have commented construction bit flimsy sidea very astute quite correct observation Thingama bob wasnt designed survive crashes brick walls Models designed crash brick walls survive generally fly like brick walls techniques involved building Thingamabob represent basic skills will equip individual future construc tion projects giving him experience some problem areas arise model construction does fly new model question always comes up early game Its safe say trainer Thingamabob flies well Yes will loop Yes will rollassuming youre very pa tient have lot sky around air plane look rudder lack ai lerons youll understand patience comes handy Still Ive flown airplane invertedthough run U 62 Model Aviation Top No Thingamabob will never win beauty contest least its versatility makes tractive can easily converted tail-dragger nose-wheeler vica versa doesnt take great deal skill build fly whatever flight configuration control method choose incorporate Above author/designer/builder/flier Bob Under wood answer easy-to-build inexpensive easy-to-fly do-everything trainer Versatility key 25-size model Its great either engine power geared 05 electric motor airplane can flown free three-channel RC tethered simple RC nd isnt enough its built bellcrank can also flown Control Line also makes great training project model construction EBob Underwood eft Close-up view business end engine K&B 25 fuel tank taped its tray easy Electric conversion simply loosen four mounting bolts pull out tray unplug throttle servo Reverse process seven cells 05 electric motor quiet run Right multipurpose innards RC servos rear tether post sticking out side CL bellcrank next aft main landing gear shown its nose-wheeler position convert tail-dragger simply unbolt move forward remove nose wheel Right Whats name After long careful thought author decided Thing-AMA-Bob Get risk bending stick transmitter search down elevator strongly urge resist jazzing up Thingamabob doesnt need ailerons doesnt need anything powerful 25 glow engine geared 05 electric Construction youve done little build ing past may want throw some ersonal techniques equation ake things easierand thats fine cer ainly claim no particular expertise uilder honesty methods ave borrowed other modelers ver years Dont paint model older style overing painting technique quite ime-consuming usually quite heavy nstead purchase couple rolls plastic film have Just sure dont try make first model prettiest history mankind Invest much time youll probably afraid fly Remember creation member familyjust thing made out wood stuff Typically point magazine con struction article youll find two things happening case model like 10-engined Widget Stealth bomber author will indicate spe cific step-by-step directions unneces sary because project should tempted experienced mod eler often interpreted person built stick model 30 years ago kid folded paper airplane old contract work yesterday other approach juncture go very exact detail steps required build model dilemma approach take decided neither right Thingamabob Since might terested building would either abso lute newcomers no background what amounts scratch-building experi enced modelers want something use club trainer detailed step-by-step di rections didnt seem appropriate addition plans rendered John Hunton quite good Study along following explanations some specific techniques used building model Fuselage sides x 3 x 36-in balsa stock angle sliced off will note April 1990 63 Full-Size Plans AvailableSee Page 196 14 38 L1 IUIA TILE GAUGE dR BALSA 3U30 SHEETI US 3USD -lb -U-II UA-U ______________---____ ____ — T0 —II j IjjjlIU4SAAARE4_________ li _________ II _________ ii _________ _________DIHEDRAL GUSSET PUT PLY UlBFii ___________________ U ______ UL ______ ______ II ______ ______ IUT BALSA TIP 3U35 ALHITSUT PLTifif FIIII I]IIi3Z LEFT______d TO9TTYPCAWINGIIII liii BITBIBGNLT _____ ___ ___ ___02 IN __11____ 11 ____ A____ 5 ____ ___ ___ ii ___________ _____ _____Ufl IIIIHIIIIIIIIF r IIIIIIII I _______UAAU3UIApAtSA CENTERLINE SF WING5UIR HAROWUGO SOWELSIUIATALGAPUSROGO END OUIRSGUT FIRM BALSA SIDESSPAR WETHEUT-SUHINA HINE, SAFETY 41U4UDWD TOWEL NAT UT~1fBB ITAWALOLC bINSSE -Il-WV-ilAL TAOS-2I}--Up UT PLOF0 IApEETAREAFl 083 WIREHHI9lUG FLU083USTOTY IL LT\lBUANY lUGT TA GAIUATALSA ANTENNAlPIN LINE GUIDEIIULAJSERVO WASTER LISTAUTAT UT IJTEPLOUTBRLSAj APPER LIUDTALSA O LOWER BALAN O UPPER BUT BALSA TUE U LOWER SWITGH~TET3E0lUG [v32][b-1-10-1-10]] ATI'___ AEUDIri HOLE STUWOLSI= 1DBNYLON TASTING IRA IUTMWLI POSIT N 58-32BLIND NAY OBLINO NAT CLEARANCE WFAEL LINE CLEARA lUG WHEELA0lUG BUT TOWSlBA nose section has no plywood dou bler makes uncomfortable go ahead add /32 ply piece extending back wing hold-down dowel Another feature may make squirm tad angle break fuse lage sides behind wing wanted elim inate need bend fuselage sides joining tail building experience know what happens take two pieces dissimilar balsa try bend fuselage comes out looking like sideways airfoil leaning either right left once succeeded building fuselage remained straight way tail boy did look weird So technique Thingamabob make partial cut fuselage sides inside cracking inward come together tail exactly center Youll need sand sides former fits point has little V outside edges glue well advantage can draw simple line down building board very easily check whether fuselage straight Theres also less tendency harder wood might exist fuse lage side draw softer piece toward hard landing might separate fuse lage point say Right Just dont land hard nothing magical about tray behind firewall Old-timer modelers will recognize method used throw back old ignition days car ried coil condenser batteries what have get frequently often after flight youre planning alternate between us ing glow electric power build two firewalls trays way can easily switch flying field Use rubberbands strap hold tank place tray Drill mounting holes attach fire wall fuselage sandwiching 64 Model Aviation pieces plywood together before side piece glued fuselage dont chances almost thou sand more-to-one youll never get holes line up properly Its kind like cutting off chair legs last thought fuselage top tether post pictured des built Frank Anderson MAA del Aeronautics Association Cana Canadian equivalent AMA Its stock tree-wheeling swivel large welded plate bottom can easily ballasted concrete bhui simple wire line guide left wing tip two outside holes flying Control Line center hole tor tethered flight close-up shot underside stabilizer/elevator also shows perma nently installed fourth wheel tail wheel greatly simplifying tail-dragger conversion bottom sheeting can placed wood grain running either lengthwise across fuselage Placing crosswise pro vides little rigidity may help use up some scraps youd like save some time have nice big length hand wont hurt run grain long way Whoops point Note some plywood parts listed Lite Ply others nots critical parts used mount bellcrank Control Line flying Use standard fiveply aircraft-grade plywood spots wing can built flat board final stage tilting up panel es tablish dihedral may wish put shear webbing after have removed board Thats no problem Just remember run grain webbing top bottom wing Dont run grain spanwise because wont able its job can sand little angle trailing edge stock make glue joint little wider also makes trailing edge somewhat less blunt wing tips glued bottom edge tip rib tilted upward triangular pieces supporting Care fully sand off excess tips form extension curved top wing airfoil put proper amount dihedral wing pin panel building board raise other off board distance board bottom tip rib should four inches Dont get ex cited after glue sets find amount bit However concerned its much less Understand having no ailerons Thingamabob just wont want turn rudder-only un less youve put right amount dihe dral Trust know first wing built lesser amount dihedral order accommodate Control Line flight configuration Big mis take took country mile turn After covering wing will probably have some flat spots around curved por tion upper surface Such condition will spoil ahem fantastic flight characteristics Thingamabob assum ing someone can disc over Tail surfaces cant figure out what suggest take up golf General thoughts engine used prototype K&B Sportster 25 has worked well Its modest cost fits concept economical modeling project use K&B Id suggest purchasing extra radial mount Thats thing Ive broken model far Electric flight version have used seven-cell battery pack geared 05 mo tor Using throttle optional simply use on/off switch fly charge al Continued page 163 PORTA-Sl16PE AndilTRAXrWXEYZ kits use S/Vs have canopy track Its round sflat flies 30 Flying DISC STOL SUPERIOR SmaN Field FLY Aircraft STABLE PREDICTABLE AGILE $4 hipping TX Res add 7% sales tax VISA MIC Foam & Lite Ply Construction ELEVON Mixer Included 25- 45cid 335lbs Accurate QUALI1Y Materials FRTA-rSlIADEEEATUSES R9QMV ---- No center pole nearly 7 tall Opaque heat reflecting canopy Q0ik rLNU --- 5 Minutes Rell LIGttTMEIOHT ---- 6clO Wenaha 6 1/2 pounds VISAW31IDRESISTANTkolO Tested 40 MPH ADJUSTASLR ---- Level tilted aids 0AlID0LE ---- Two three can joined Econosy foil$3900 $400UPS Sportasan Rail$4395e $400UPS Dsnsng 9w10$5700 $400UPS Sportklng 9w18$9350e $050UPS Mach Tots-Tarp 4c6$ 795e $200UPS Trak-Lok-Kyc Kit TAA2$1000 $200UPS Trak-Lok-Eve Kit TAA3$1450 $200UPS FRE8 1-80042116264MCO13lEfQiJSilPQ~ ORDERS DEALERS 5 DISTRIBOTOR CALLS 209 SW eocv AVE OveR literature available BARThESVILLEOK 74003 4M Coepany products qo-33-9445 f.e Time Bonded Model Products Box 10998 Suite 543 Austin TX 78786 512 250-1420 512444-3368 April 1990 65 OT OLI H STAY COOL PERFECT SHADE AT THE FLYING FIELDTRACEOUT CAMPING OR AT THE LAKE OFF C SHADE TENT AT 1987 RATS FOR S/C FATIERN UDGES SHADE TENT AT 1988 RATS AT S/C PATERN SITES FOR OFF C S HEADQUARTERS TENTS AND TRANSMITTER IMPOUNDS Put Fun Back Fun Fly Got ROUN TUIT Today ONLY Money Back GUARANTEE Business get scale documentation Bell 204 model its work car speak Nonetheless its easy achieve final product detailed Mikes Hucy As can see Mike true craftsman Unfortunately particular model badly damaged Tan gerine Rot Mike bouncing back getting ready Nats right now Mike wish lot luck anxious see Nats model Please keep us posted interested Im contacting Bill Curtis get information various blades products Ill get update recent talk John Gorham brought up speed happenings GMP According John Americanization GMP complete including new main gear tail rotor gear box cooling shroud Thats lot tooling say necessity mother GMP able reach its goals short three months John says UMP kits stock Rebel entertaining large following John also mentioned new 40-size full-house machine make its debut Toledo Tentatively called Viper new Helicopter features light weight full aerobatic performance Im sorry column going short month Ive recently very busy large ducted-fan model Boeing 737-200 movie Im just now getting life back tofor mewhat normal would however like thank reading column have questions photos Helicopt ers dont drop line Ill sure try publish BCNU Dutch/Lehmberg Continued page 61 40A P-38G L F-80A B C Hudson Martin B-b B-lOB B-12 McDon nell F-lO1F North American BT-9B BC-i AT-6 6A through C A-36A B 25C H J P-51B D H Northrop A17 Piasecki H-21 Republic P-47C D N F-84E Severski BT-8 P 35 Supermarine Spitfire Va Vb Stearman PT-17 St Louis C&F PT15 Thomas-Morse O-19B C E Verville PT-bC Vultee BT 13A BTL5 Note some airplanes near Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPtR POSY RESIN K&B SUPER POSY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS duplicates Beech 18 C-45 AT-7 AT-il same basic airplane Cur tiss A-3B 0-16 differ armament rear seat equipment Vultee BT 13A BT-15 have different power plants etc its quite impressive list man career Thingamabob/Underwood Continued page 65 out dont have land deadstick Determining flight time ever will take some practice part Deciding locate on/off switch does present little problem mount fuselage side youll have demount time change elec tric glow back again put switch firewall under electric motor falls under heading dumb since exercise extreme caution keeping fingers out prop Dont flying Control Line use least 50 ft lengths 018 braided lines model will fly 60-ft lines no trouble Seventy-footers would probably stretch ing limits credibility thing must un less want screw yourself ground fill fuel tank 25 engine will run what seems like jillion hours four ounces fuel quite since flown much Control Line test flew Thingamabob version up about three four minutes dawned filled tank wouldnt know got beautiful fast engine run lasted almost 30 minutes mind-numbing dizzying circular flight Get syringe-type filler measure ounce two start Control Line version remove rudder pushrod servo attach rudder post will induce right turn rudder will keep model out end lines found unnecessary put weight out board wing tip right rudder small amount right thrust engine A monthly publication covering International RC Soaring Scene US $17 yr 21/yr 1st class In Canada/Mexico $22/yr US funds AsIa & Paclf Ic $28/yr US funds Europe UK $28/yr US funds Surface Mall ForeIgn $18/yr US funds RO SOARING DIGEST PO Box 1079 Payson AZ 85547 THE LEADE NEW ES 100 THP DESIGN DIAPRICE 15 16 NEW PROPELLERS CYCLE TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOWI PITCH THP 66778 67lvo 8 677 Iz 8 67 678 PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 B334568 845667 9456677 1045667 106W8W 106EW Ii4677/776 115W 11BEW 1167 124W 125W 1256 1356 1456 1556 164N 16678 April 1990 163 Performa TOP PERFO K&B ENGINES AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices RC PYLON RACING SERIES 500 DIAPITCHPRICE 75N 5N SERIES 400C 66677/o7¾ 9777 W WIDE BLADE EW EXTRA WIDE iJADDAW will keep lines taut Just dont try fly strong winds strong strong dont have magic yardstick can tell careful should also pull elevator arm off servo bellcrank doesnt put drag servo coreless servos have little inherent drag just doesnt make sense move unnec essarily fly Thingamabob tethered model youll probably pioneer mode Again rudder pushrod must tached rudder post Watch nose wheel doesnt turn model side circle little outv d turn ac ceptable inside turning isr . Unlike flying Control Line cant backpedal keep lines tight model veers cir cle can chop throttle give down elevatorand crash lower altitude tether goes through center guide wing tip Again recommend no less 50 ft line Use 021 braided line can check AMA Competition Regulations book find out acceptable ways connect control lines tether center post something unknown quantity post pictured article constructed Frank Ander son belongs organization Canadian equivalent AMA beautifully built welded stock freely operating swivel top large plate welded bottom Using two ordinary concrete blocks hold down Ive encountered no problem tip ping operating either grass pave ment Watch magazines since under stand marketing Franks unit may offing certainly has met expectations Other approaches tether center post certainly possible important thing keep mind safety Remember model should come off tether have no means maintaining level flight since despite throttle elevator control rudder locked right name Thingamabob coined good friend St Louis problem describing model just day friend cleverer knew What skipped right rather long stretch time name broke down didnt pick up meaning finally woke up realized said Thing-AMA-Bob Now know spent 30 years fifth gradeteaching Nonmodeler staff members AMA Headquarters have flown trainer have others hope enjoy much have Remembering its nothing fancy keeps things perspective should also noted model now property AMA turning over rights AMA made pro vision Any profits might accrue its use others would channeled promotion support youth activi ties within Academy Would like make kit design CL Aerobatics/McMiIIan Continued page 66 pits give some insight to make plane perform better under varying conditions Now some tips first concerns warps Everyone experiences problem plane plane What going deal few dos help preserve die-straight surface just completed starting cover paint Always paint/cover opposite side sur face quickly possible after doing first side drying process does induce uneven stress structure Store freshly painted plane its pieces after coat paint vertical po sition Out drying/curing pro cess basic plane adjust holding fix ture tail pointed straight up movable surfaces align holding jig hinge lines vertical have fixtures surfaces dont Unfortunately know bad things hap pen occasion warp will creep wayusually bow flap Try following procedure has worked well years What construct simple drying jig CAT NO 106 Proof Switch Retail S995 Add $125 shipping Send $150 catalog Michigan residents add 40/0 sales tax IMPROVE YOUR 1991 SWITCH OVER ej Proof Switch Positive Locking Prevents Arriving field dead batteries Accidental switching off before take-off Will vibrate apart causing loss radio Does require special mounts Works radios Ideal seaplanes completely water proof SEE YOUR LOCAL HOBBY DEALER unavailable locally send Bru Line Industries Inc 4mm PO Box 3786 Center Line MI 48015 Model Hardware iIibIr Worlds Moat Complete Hardware Catalog HOBBY SUPPLY SOUTH 5060 Glade Road Acworth GA 30101 14041 974-0843 164 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 SlOE Arrow Highway San Dimas CA 91773 FEATURING Fully illustrated manufalurers fuN line shown Hard*are tools paints adhesIves engines. invaluable reference pfoduct selection use Unique HSS brand products mn serious modeler$300 ppd
Edition: Model Aviation - 1990/04
Page Numbers: 62, 63, 64, 65, 163, 164
THIS IS definitely pretty model wasnt meant designed Thing amabob few simple goals mind model should very easy build rel atively inexpensive fly reasonably well also wanted airplane could flown number different configura tions Though wont fly FAI RC Aerobat ics pattern Thingamabob meets goals Its Dick Jane model will help beginner learn fly vesting large amounts time money project same time building airplanes will teach some basic con struction skills mind important consideration variety almost-ready-to-fly models readily avail able logic suggests individual has genuine interest hobby/sport aero modeling somewhere down road will need know build sides anytime invest something self just money project takes far importance meaning Thingamabob should noted no great marvel engineering wing airfoil example created LAR looks about right system People have commented construction bit flimsy sidea very astute quite correct observation Thingama bob wasnt designed survive crashes brick walls Models designed crash brick walls survive generally fly like brick walls techniques involved building Thingamabob represent basic skills will equip individual future construc tion projects giving him experience some problem areas arise model construction does fly new model question always comes up early game Its safe say trainer Thingamabob flies well Yes will loop Yes will rollassuming youre very pa tient have lot sky around air plane look rudder lack ai lerons youll understand patience comes handy Still Ive flown airplane invertedthough run U 62 Model Aviation Top No Thingamabob will never win beauty contest least its versatility makes tractive can easily converted tail-dragger nose-wheeler vica versa doesnt take great deal skill build fly whatever flight configuration control method choose incorporate Above author/designer/builder/flier Bob Under wood answer easy-to-build inexpensive easy-to-fly do-everything trainer Versatility key 25-size model Its great either engine power geared 05 electric motor airplane can flown free three-channel RC tethered simple RC nd isnt enough its built bellcrank can also flown Control Line also makes great training project model construction EBob Underwood eft Close-up view business end engine K&B 25 fuel tank taped its tray easy Electric conversion simply loosen four mounting bolts pull out tray unplug throttle servo Reverse process seven cells 05 electric motor quiet run Right multipurpose innards RC servos rear tether post sticking out side CL bellcrank next aft main landing gear shown its nose-wheeler position convert tail-dragger simply unbolt move forward remove nose wheel Right Whats name After long careful thought author decided Thing-AMA-Bob Get risk bending stick transmitter search down elevator strongly urge resist jazzing up Thingamabob doesnt need ailerons doesnt need anything powerful 25 glow engine geared 05 electric Construction youve done little build ing past may want throw some ersonal techniques equation ake things easierand thats fine cer ainly claim no particular expertise uilder honesty methods ave borrowed other modelers ver years Dont paint model older style overing painting technique quite ime-consuming usually quite heavy nstead purchase couple rolls plastic film have Just sure dont try make first model prettiest history mankind Invest much time youll probably afraid fly Remember creation member familyjust thing made out wood stuff Typically point magazine con struction article youll find two things happening case model like 10-engined Widget Stealth bomber author will indicate spe cific step-by-step directions unneces sary because project should tempted experienced mod eler often interpreted person built stick model 30 years ago kid folded paper airplane old contract work yesterday other approach juncture go very exact detail steps required build model dilemma approach take decided neither right Thingamabob Since might terested building would either abso lute newcomers no background what amounts scratch-building experi enced modelers want something use club trainer detailed step-by-step di rections didnt seem appropriate addition plans rendered John Hunton quite good Study along following explanations some specific techniques used building model Fuselage sides x 3 x 36-in balsa stock angle sliced off will note April 1990 63 Full-Size Plans AvailableSee Page 196 14 38 L1 IUIA TILE GAUGE dR BALSA 3U30 SHEETI US 3USD -lb -U-II UA-U ______________---____ ____ — T0 —II j IjjjlIU4SAAARE4_________ li _________ II _________ ii _________ _________DIHEDRAL GUSSET PUT PLY UlBFii ___________________ U ______ UL ______ ______ II ______ ______ IUT BALSA TIP 3U35 ALHITSUT PLTifif FIIII I]IIi3Z LEFT______d TO9TTYPCAWINGIIII liii BITBIBGNLT _____ ___ ___ ___02 IN __11____ 11 ____ A____ 5 ____ ___ ___ ii ___________ _____ _____Ufl IIIIHIIIIIIIIF r IIIIIIII I _______UAAU3UIApAtSA CENTERLINE SF WING5UIR HAROWUGO SOWELSIUIATALGAPUSROGO END OUIRSGUT FIRM BALSA SIDESSPAR WETHEUT-SUHINA HINE, SAFETY 41U4UDWD TOWEL NAT UT~1fBB ITAWALOLC bINSSE -Il-WV-ilAL TAOS-2I}--Up UT PLOF0 IApEETAREAFl 083 WIREHHI9lUG FLU083USTOTY IL LT\lBUANY lUGT TA GAIUATALSA ANTENNAlPIN LINE GUIDEIIULAJSERVO WASTER LISTAUTAT UT IJTEPLOUTBRLSAj APPER LIUDTALSA O LOWER BALAN O UPPER BUT BALSA TUE U LOWER SWITGH~TET3E0lUG [v32][b-1-10-1-10]] ATI'___ AEUDIri HOLE STUWOLSI= 1DBNYLON TASTING IRA IUTMWLI POSIT N 58-32BLIND NAY OBLINO NAT CLEARANCE WFAEL LINE CLEARA lUG WHEELA0lUG BUT TOWSlBA nose section has no plywood dou bler makes uncomfortable go ahead add /32 ply piece extending back wing hold-down dowel Another feature may make squirm tad angle break fuse lage sides behind wing wanted elim inate need bend fuselage sides joining tail building experience know what happens take two pieces dissimilar balsa try bend fuselage comes out looking like sideways airfoil leaning either right left once succeeded building fuselage remained straight way tail boy did look weird So technique Thingamabob make partial cut fuselage sides inside cracking inward come together tail exactly center Youll need sand sides former fits point has little V outside edges glue well advantage can draw simple line down building board very easily check whether fuselage straight Theres also less tendency harder wood might exist fuse lage side draw softer piece toward hard landing might separate fuse lage point say Right Just dont land hard nothing magical about tray behind firewall Old-timer modelers will recognize method used throw back old ignition days car ried coil condenser batteries what have get frequently often after flight youre planning alternate between us ing glow electric power build two firewalls trays way can easily switch flying field Use rubberbands strap hold tank place tray Drill mounting holes attach fire wall fuselage sandwiching 64 Model Aviation pieces plywood together before side piece glued fuselage dont chances almost thou sand more-to-one youll never get holes line up properly Its kind like cutting off chair legs last thought fuselage top tether post pictured des built Frank Anderson MAA del Aeronautics Association Cana Canadian equivalent AMA Its stock tree-wheeling swivel large welded plate bottom can easily ballasted concrete bhui simple wire line guide left wing tip two outside holes flying Control Line center hole tor tethered flight close-up shot underside stabilizer/elevator also shows perma nently installed fourth wheel tail wheel greatly simplifying tail-dragger conversion bottom sheeting can placed wood grain running either lengthwise across fuselage Placing crosswise pro vides little rigidity may help use up some scraps youd like save some time have nice big length hand wont hurt run grain long way Whoops point Note some plywood parts listed Lite Ply others nots critical parts used mount bellcrank Control Line flying Use standard fiveply aircraft-grade plywood spots wing can built flat board final stage tilting up panel es tablish dihedral may wish put shear webbing after have removed board Thats no problem Just remember run grain webbing top bottom wing Dont run grain spanwise because wont able its job can sand little angle trailing edge stock make glue joint little wider also makes trailing edge somewhat less blunt wing tips glued bottom edge tip rib tilted upward triangular pieces supporting Care fully sand off excess tips form extension curved top wing airfoil put proper amount dihedral wing pin panel building board raise other off board distance board bottom tip rib should four inches Dont get ex cited after glue sets find amount bit However concerned its much less Understand having no ailerons Thingamabob just wont want turn rudder-only un less youve put right amount dihe dral Trust know first wing built lesser amount dihedral order accommodate Control Line flight configuration Big mis take took country mile turn After covering wing will probably have some flat spots around curved por tion upper surface Such condition will spoil ahem fantastic flight characteristics Thingamabob assum ing someone can disc over Tail surfaces cant figure out what suggest take up golf General thoughts engine used prototype K&B Sportster 25 has worked well Its modest cost fits concept economical modeling project use K&B Id suggest purchasing extra radial mount Thats thing Ive broken model far Electric flight version have used seven-cell battery pack geared 05 mo tor Using throttle optional simply use on/off switch fly charge al Continued page 163 PORTA-Sl16PE AndilTRAXrWXEYZ kits use S/Vs have canopy track Its round sflat flies 30 Flying DISC STOL SUPERIOR SmaN Field FLY Aircraft STABLE PREDICTABLE AGILE $4 hipping TX Res add 7% sales tax VISA MIC Foam & Lite Ply Construction ELEVON Mixer Included 25- 45cid 335lbs Accurate QUALI1Y Materials FRTA-rSlIADEEEATUSES R9QMV ---- No center pole nearly 7 tall Opaque heat reflecting canopy Q0ik rLNU --- 5 Minutes Rell LIGttTMEIOHT ---- 6clO Wenaha 6 1/2 pounds VISAW31IDRESISTANTkolO Tested 40 MPH ADJUSTASLR ---- Level tilted aids 0AlID0LE ---- Two three can joined Econosy foil$3900 $400UPS Sportasan Rail$4395e $400UPS Dsnsng 9w10$5700 $400UPS Sportklng 9w18$9350e $050UPS Mach Tots-Tarp 4c6$ 795e $200UPS Trak-Lok-Kyc Kit TAA2$1000 $200UPS Trak-Lok-Eve Kit TAA3$1450 $200UPS FRE8 1-80042116264MCO13lEfQiJSilPQ~ ORDERS DEALERS 5 DISTRIBOTOR CALLS 209 SW eocv AVE OveR literature available BARThESVILLEOK 74003 4M Coepany products qo-33-9445 f.e Time Bonded Model Products Box 10998 Suite 543 Austin TX 78786 512 250-1420 512444-3368 April 1990 65 OT OLI H STAY COOL PERFECT SHADE AT THE FLYING FIELDTRACEOUT CAMPING OR AT THE LAKE OFF C SHADE TENT AT 1987 RATS FOR S/C FATIERN UDGES SHADE TENT AT 1988 RATS AT S/C PATERN SITES FOR OFF C S HEADQUARTERS TENTS AND TRANSMITTER IMPOUNDS Put Fun Back Fun Fly Got ROUN TUIT Today ONLY Money Back GUARANTEE Business get scale documentation Bell 204 model its work car speak Nonetheless its easy achieve final product detailed Mikes Hucy As can see Mike true craftsman Unfortunately particular model badly damaged Tan gerine Rot Mike bouncing back getting ready Nats right now Mike wish lot luck anxious see Nats model Please keep us posted interested Im contacting Bill Curtis get information various blades products Ill get update recent talk John Gorham brought up speed happenings GMP According John Americanization GMP complete including new main gear tail rotor gear box cooling shroud Thats lot tooling say necessity mother GMP able reach its goals short three months John says UMP kits stock Rebel entertaining large following John also mentioned new 40-size full-house machine make its debut Toledo Tentatively called Viper new Helicopter features light weight full aerobatic performance Im sorry column going short month Ive recently very busy large ducted-fan model Boeing 737-200 movie Im just now getting life back tofor mewhat normal would however like thank reading column have questions photos Helicopt ers dont drop line Ill sure try publish BCNU Dutch/Lehmberg Continued page 61 40A P-38G L F-80A B C Hudson Martin B-b B-lOB B-12 McDon nell F-lO1F North American BT-9B BC-i AT-6 6A through C A-36A B 25C H J P-51B D H Northrop A17 Piasecki H-21 Republic P-47C D N F-84E Severski BT-8 P 35 Supermarine Spitfire Va Vb Stearman PT-17 St Louis C&F PT15 Thomas-Morse O-19B C E Verville PT-bC Vultee BT 13A BTL5 Note some airplanes near Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPtR POSY RESIN K&B SUPER POSY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS duplicates Beech 18 C-45 AT-7 AT-il same basic airplane Cur tiss A-3B 0-16 differ armament rear seat equipment Vultee BT 13A BT-15 have different power plants etc its quite impressive list man career Thingamabob/Underwood Continued page 65 out dont have land deadstick Determining flight time ever will take some practice part Deciding locate on/off switch does present little problem mount fuselage side youll have demount time change elec tric glow back again put switch firewall under electric motor falls under heading dumb since exercise extreme caution keeping fingers out prop Dont flying Control Line use least 50 ft lengths 018 braided lines model will fly 60-ft lines no trouble Seventy-footers would probably stretch ing limits credibility thing must un less want screw yourself ground fill fuel tank 25 engine will run what seems like jillion hours four ounces fuel quite since flown much Control Line test flew Thingamabob version up about three four minutes dawned filled tank wouldnt know got beautiful fast engine run lasted almost 30 minutes mind-numbing dizzying circular flight Get syringe-type filler measure ounce two start Control Line version remove rudder pushrod servo attach rudder post will induce right turn rudder will keep model out end lines found unnecessary put weight out board wing tip right rudder small amount right thrust engine A monthly publication covering International RC Soaring Scene US $17 yr 21/yr 1st class In Canada/Mexico $22/yr US funds AsIa & Paclf Ic $28/yr US funds Europe UK $28/yr US funds Surface Mall ForeIgn $18/yr US funds RO SOARING DIGEST PO Box 1079 Payson AZ 85547 THE LEADE NEW ES 100 THP DESIGN DIAPRICE 15 16 NEW PROPELLERS CYCLE TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOWI PITCH THP 66778 67lvo 8 677 Iz 8 67 678 PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 B334568 845667 9456677 1045667 106W8W 106EW Ii4677/776 115W 11BEW 1167 124W 125W 1256 1356 1456 1556 164N 16678 April 1990 163 Performa TOP PERFO K&B ENGINES AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices RC PYLON RACING SERIES 500 DIAPITCHPRICE 75N 5N SERIES 400C 66677/o7¾ 9777 W WIDE BLADE EW EXTRA WIDE iJADDAW will keep lines taut Just dont try fly strong winds strong strong dont have magic yardstick can tell careful should also pull elevator arm off servo bellcrank doesnt put drag servo coreless servos have little inherent drag just doesnt make sense move unnec essarily fly Thingamabob tethered model youll probably pioneer mode Again rudder pushrod must tached rudder post Watch nose wheel doesnt turn model side circle little outv d turn ac ceptable inside turning isr . Unlike flying Control Line cant backpedal keep lines tight model veers cir cle can chop throttle give down elevatorand crash lower altitude tether goes through center guide wing tip Again recommend no less 50 ft line Use 021 braided line can check AMA Competition Regulations book find out acceptable ways connect control lines tether center post something unknown quantity post pictured article constructed Frank Ander son belongs organization Canadian equivalent AMA beautifully built welded stock freely operating swivel top large plate welded bottom Using two ordinary concrete blocks hold down Ive encountered no problem tip ping operating either grass pave ment Watch magazines since under stand marketing Franks unit may offing certainly has met expectations Other approaches tether center post certainly possible important thing keep mind safety Remember model should come off tether have no means maintaining level flight since despite throttle elevator control rudder locked right name Thingamabob coined good friend St Louis problem describing model just day friend cleverer knew What skipped right rather long stretch time name broke down didnt pick up meaning finally woke up realized said Thing-AMA-Bob Now know spent 30 years fifth gradeteaching Nonmodeler staff members AMA Headquarters have flown trainer have others hope enjoy much have Remembering its nothing fancy keeps things perspective should also noted model now property AMA turning over rights AMA made pro vision Any profits might accrue its use others would channeled promotion support youth activi ties within Academy Would like make kit design CL Aerobatics/McMiIIan Continued page 66 pits give some insight to make plane perform better under varying conditions Now some tips first concerns warps Everyone experiences problem plane plane What going deal few dos help preserve die-straight surface just completed starting cover paint Always paint/cover opposite side sur face quickly possible after doing first side drying process does induce uneven stress structure Store freshly painted plane its pieces after coat paint vertical po sition Out drying/curing pro cess basic plane adjust holding fix ture tail pointed straight up movable surfaces align holding jig hinge lines vertical have fixtures surfaces dont Unfortunately know bad things hap pen occasion warp will creep wayusually bow flap Try following procedure has worked well years What construct simple drying jig CAT NO 106 Proof Switch Retail S995 Add $125 shipping Send $150 catalog Michigan residents add 40/0 sales tax IMPROVE YOUR 1991 SWITCH OVER ej Proof Switch Positive Locking Prevents Arriving field dead batteries Accidental switching off before take-off Will vibrate apart causing loss radio Does require special mounts Works radios Ideal seaplanes completely water proof SEE YOUR LOCAL HOBBY DEALER unavailable locally send Bru Line Industries Inc 4mm PO Box 3786 Center Line MI 48015 Model Hardware iIibIr Worlds Moat Complete Hardware Catalog HOBBY SUPPLY SOUTH 5060 Glade Road Acworth GA 30101 14041 974-0843 164 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 SlOE Arrow Highway San Dimas CA 91773 FEATURING Fully illustrated manufalurers fuN line shown Hard*are tools paints adhesIves engines. invaluable reference pfoduct selection use Unique HSS brand products mn serious modeler$300 ppd
Edition: Model Aviation - 1990/04
Page Numbers: 62, 63, 64, 65, 163, 164
THIS IS definitely pretty model wasnt meant designed Thing amabob few simple goals mind model should very easy build rel atively inexpensive fly reasonably well also wanted airplane could flown number different configura tions Though wont fly FAI RC Aerobat ics pattern Thingamabob meets goals Its Dick Jane model will help beginner learn fly vesting large amounts time money project same time building airplanes will teach some basic con struction skills mind important consideration variety almost-ready-to-fly models readily avail able logic suggests individual has genuine interest hobby/sport aero modeling somewhere down road will need know build sides anytime invest something self just money project takes far importance meaning Thingamabob should noted no great marvel engineering wing airfoil example created LAR looks about right system People have commented construction bit flimsy sidea very astute quite correct observation Thingama bob wasnt designed survive crashes brick walls Models designed crash brick walls survive generally fly like brick walls techniques involved building Thingamabob represent basic skills will equip individual future construc tion projects giving him experience some problem areas arise model construction does fly new model question always comes up early game Its safe say trainer Thingamabob flies well Yes will loop Yes will rollassuming youre very pa tient have lot sky around air plane look rudder lack ai lerons youll understand patience comes handy Still Ive flown airplane invertedthough run U 62 Model Aviation Top No Thingamabob will never win beauty contest least its versatility makes tractive can easily converted tail-dragger nose-wheeler vica versa doesnt take great deal skill build fly whatever flight configuration control method choose incorporate Above author/designer/builder/flier Bob Under wood answer easy-to-build inexpensive easy-to-fly do-everything trainer Versatility key 25-size model Its great either engine power geared 05 electric motor airplane can flown free three-channel RC tethered simple RC nd isnt enough its built bellcrank can also flown Control Line also makes great training project model construction EBob Underwood eft Close-up view business end engine K&B 25 fuel tank taped its tray easy Electric conversion simply loosen four mounting bolts pull out tray unplug throttle servo Reverse process seven cells 05 electric motor quiet run Right multipurpose innards RC servos rear tether post sticking out side CL bellcrank next aft main landing gear shown its nose-wheeler position convert tail-dragger simply unbolt move forward remove nose wheel Right Whats name After long careful thought author decided Thing-AMA-Bob Get risk bending stick transmitter search down elevator strongly urge resist jazzing up Thingamabob doesnt need ailerons doesnt need anything powerful 25 glow engine geared 05 electric Construction youve done little build ing past may want throw some ersonal techniques equation ake things easierand thats fine cer ainly claim no particular expertise uilder honesty methods ave borrowed other modelers ver years Dont paint model older style overing painting technique quite ime-consuming usually quite heavy nstead purchase couple rolls plastic film have Just sure dont try make first model prettiest history mankind Invest much time youll probably afraid fly Remember creation member familyjust thing made out wood stuff Typically point magazine con struction article youll find two things happening case model like 10-engined Widget Stealth bomber author will indicate spe cific step-by-step directions unneces sary because project should tempted experienced mod eler often interpreted person built stick model 30 years ago kid folded paper airplane old contract work yesterday other approach juncture go very exact detail steps required build model dilemma approach take decided neither right Thingamabob Since might terested building would either abso lute newcomers no background what amounts scratch-building experi enced modelers want something use club trainer detailed step-by-step di rections didnt seem appropriate addition plans rendered John Hunton quite good Study along following explanations some specific techniques used building model Fuselage sides x 3 x 36-in balsa stock angle sliced off will note April 1990 63 Full-Size Plans AvailableSee Page 196 14 38 L1 IUIA TILE GAUGE dR BALSA 3U30 SHEETI US 3USD -lb -U-II UA-U ______________---____ ____ — T0 —II j IjjjlIU4SAAARE4_________ li _________ II _________ ii _________ _________DIHEDRAL GUSSET PUT PLY UlBFii ___________________ U ______ UL ______ ______ II ______ ______ IUT BALSA TIP 3U35 ALHITSUT PLTifif FIIII I]IIi3Z LEFT______d TO9TTYPCAWINGIIII liii BITBIBGNLT _____ ___ ___ ___02 IN __11____ 11 ____ A____ 5 ____ ___ ___ ii ___________ _____ _____Ufl IIIIHIIIIIIIIF r IIIIIIII I _______UAAU3UIApAtSA CENTERLINE SF WING5UIR HAROWUGO SOWELSIUIATALGAPUSROGO END OUIRSGUT FIRM BALSA SIDESSPAR WETHEUT-SUHINA HINE, SAFETY 41U4UDWD TOWEL NAT UT~1fBB ITAWALOLC bINSSE -Il-WV-ilAL TAOS-2I}--Up UT PLOF0 IApEETAREAFl 083 WIREHHI9lUG FLU083USTOTY IL LT\lBUANY lUGT TA GAIUATALSA ANTENNAlPIN LINE GUIDEIIULAJSERVO WASTER LISTAUTAT UT IJTEPLOUTBRLSAj APPER LIUDTALSA O LOWER BALAN O UPPER BUT BALSA TUE U LOWER SWITGH~TET3E0lUG [v32][b-1-10-1-10]] ATI'___ AEUDIri HOLE STUWOLSI= 1DBNYLON TASTING IRA IUTMWLI POSIT N 58-32BLIND NAY OBLINO NAT CLEARANCE WFAEL LINE CLEARA lUG WHEELA0lUG BUT TOWSlBA nose section has no plywood dou bler makes uncomfortable go ahead add /32 ply piece extending back wing hold-down dowel Another feature may make squirm tad angle break fuse lage sides behind wing wanted elim inate need bend fuselage sides joining tail building experience know what happens take two pieces dissimilar balsa try bend fuselage comes out looking like sideways airfoil leaning either right left once succeeded building fuselage remained straight way tail boy did look weird So technique Thingamabob make partial cut fuselage sides inside cracking inward come together tail exactly center Youll need sand sides former fits point has little V outside edges glue well advantage can draw simple line down building board very easily check whether fuselage straight Theres also less tendency harder wood might exist fuse lage side draw softer piece toward hard landing might separate fuse lage point say Right Just dont land hard nothing magical about tray behind firewall Old-timer modelers will recognize method used throw back old ignition days car ried coil condenser batteries what have get frequently often after flight youre planning alternate between us ing glow electric power build two firewalls trays way can easily switch flying field Use rubberbands strap hold tank place tray Drill mounting holes attach fire wall fuselage sandwiching 64 Model Aviation pieces plywood together before side piece glued fuselage dont chances almost thou sand more-to-one youll never get holes line up properly Its kind like cutting off chair legs last thought fuselage top tether post pictured des built Frank Anderson MAA del Aeronautics Association Cana Canadian equivalent AMA Its stock tree-wheeling swivel large welded plate bottom can easily ballasted concrete bhui simple wire line guide left wing tip two outside holes flying Control Line center hole tor tethered flight close-up shot underside stabilizer/elevator also shows perma nently installed fourth wheel tail wheel greatly simplifying tail-dragger conversion bottom sheeting can placed wood grain running either lengthwise across fuselage Placing crosswise pro vides little rigidity may help use up some scraps youd like save some time have nice big length hand wont hurt run grain long way Whoops point Note some plywood parts listed Lite Ply others nots critical parts used mount bellcrank Control Line flying Use standard fiveply aircraft-grade plywood spots wing can built flat board final stage tilting up panel es tablish dihedral may wish put shear webbing after have removed board Thats no problem Just remember run grain webbing top bottom wing Dont run grain spanwise because wont able its job can sand little angle trailing edge stock make glue joint little wider also makes trailing edge somewhat less blunt wing tips glued bottom edge tip rib tilted upward triangular pieces supporting Care fully sand off excess tips form extension curved top wing airfoil put proper amount dihedral wing pin panel building board raise other off board distance board bottom tip rib should four inches Dont get ex cited after glue sets find amount bit However concerned its much less Understand having no ailerons Thingamabob just wont want turn rudder-only un less youve put right amount dihe dral Trust know first wing built lesser amount dihedral order accommodate Control Line flight configuration Big mis take took country mile turn After covering wing will probably have some flat spots around curved por tion upper surface Such condition will spoil ahem fantastic flight characteristics Thingamabob assum ing someone can disc over Tail surfaces cant figure out what suggest take up golf General thoughts engine used prototype K&B Sportster 25 has worked well Its modest cost fits concept economical modeling project use K&B Id suggest purchasing extra radial mount Thats thing Ive broken model far Electric flight version have used seven-cell battery pack geared 05 mo tor Using throttle optional simply use on/off switch fly charge al Continued page 163 PORTA-Sl16PE AndilTRAXrWXEYZ kits use S/Vs have canopy track Its round sflat flies 30 Flying DISC STOL SUPERIOR SmaN Field FLY Aircraft STABLE PREDICTABLE AGILE $4 hipping TX Res add 7% sales tax VISA MIC Foam & Lite Ply Construction ELEVON Mixer Included 25- 45cid 335lbs Accurate QUALI1Y Materials FRTA-rSlIADEEEATUSES R9QMV ---- No center pole nearly 7 tall Opaque heat reflecting canopy Q0ik rLNU --- 5 Minutes Rell LIGttTMEIOHT ---- 6clO Wenaha 6 1/2 pounds VISAW31IDRESISTANTkolO Tested 40 MPH ADJUSTASLR ---- Level tilted aids 0AlID0LE ---- Two three can joined Econosy foil$3900 $400UPS Sportasan Rail$4395e $400UPS Dsnsng 9w10$5700 $400UPS Sportklng 9w18$9350e $050UPS Mach Tots-Tarp 4c6$ 795e $200UPS Trak-Lok-Kyc Kit TAA2$1000 $200UPS Trak-Lok-Eve Kit TAA3$1450 $200UPS FRE8 1-80042116264MCO13lEfQiJSilPQ~ ORDERS DEALERS 5 DISTRIBOTOR CALLS 209 SW eocv AVE OveR literature available BARThESVILLEOK 74003 4M Coepany products qo-33-9445 f.e Time Bonded Model Products Box 10998 Suite 543 Austin TX 78786 512 250-1420 512444-3368 April 1990 65 OT OLI H STAY COOL PERFECT SHADE AT THE FLYING FIELDTRACEOUT CAMPING OR AT THE LAKE OFF C SHADE TENT AT 1987 RATS FOR S/C FATIERN UDGES SHADE TENT AT 1988 RATS AT S/C PATERN SITES FOR OFF C S HEADQUARTERS TENTS AND TRANSMITTER IMPOUNDS Put Fun Back Fun Fly Got ROUN TUIT Today ONLY Money Back GUARANTEE Business get scale documentation Bell 204 model its work car speak Nonetheless its easy achieve final product detailed Mikes Hucy As can see Mike true craftsman Unfortunately particular model badly damaged Tan gerine Rot Mike bouncing back getting ready Nats right now Mike wish lot luck anxious see Nats model Please keep us posted interested Im contacting Bill Curtis get information various blades products Ill get update recent talk John Gorham brought up speed happenings GMP According John Americanization GMP complete including new main gear tail rotor gear box cooling shroud Thats lot tooling say necessity mother GMP able reach its goals short three months John says UMP kits stock Rebel entertaining large following John also mentioned new 40-size full-house machine make its debut Toledo Tentatively called Viper new Helicopter features light weight full aerobatic performance Im sorry column going short month Ive recently very busy large ducted-fan model Boeing 737-200 movie Im just now getting life back tofor mewhat normal would however like thank reading column have questions photos Helicopt ers dont drop line Ill sure try publish BCNU Dutch/Lehmberg Continued page 61 40A P-38G L F-80A B C Hudson Martin B-b B-lOB B-12 McDon nell F-lO1F North American BT-9B BC-i AT-6 6A through C A-36A B 25C H J P-51B D H Northrop A17 Piasecki H-21 Republic P-47C D N F-84E Severski BT-8 P 35 Supermarine Spitfire Va Vb Stearman PT-17 St Louis C&F PT15 Thomas-Morse O-19B C E Verville PT-bC Vultee BT 13A BTL5 Note some airplanes near Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPtR POSY RESIN K&B SUPER POSY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS duplicates Beech 18 C-45 AT-7 AT-il same basic airplane Cur tiss A-3B 0-16 differ armament rear seat equipment Vultee BT 13A BT-15 have different power plants etc its quite impressive list man career Thingamabob/Underwood Continued page 65 out dont have land deadstick Determining flight time ever will take some practice part Deciding locate on/off switch does present little problem mount fuselage side youll have demount time change elec tric glow back again put switch firewall under electric motor falls under heading dumb since exercise extreme caution keeping fingers out prop Dont flying Control Line use least 50 ft lengths 018 braided lines model will fly 60-ft lines no trouble Seventy-footers would probably stretch ing limits credibility thing must un less want screw yourself ground fill fuel tank 25 engine will run what seems like jillion hours four ounces fuel quite since flown much Control Line test flew Thingamabob version up about three four minutes dawned filled tank wouldnt know got beautiful fast engine run lasted almost 30 minutes mind-numbing dizzying circular flight Get syringe-type filler measure ounce two start Control Line version remove rudder pushrod servo attach rudder post will induce right turn rudder will keep model out end lines found unnecessary put weight out board wing tip right rudder small amount right thrust engine A monthly publication covering International RC Soaring Scene US $17 yr 21/yr 1st class In Canada/Mexico $22/yr US funds AsIa & Paclf Ic $28/yr US funds Europe UK $28/yr US funds Surface Mall ForeIgn $18/yr US funds RO SOARING DIGEST PO Box 1079 Payson AZ 85547 THE LEADE NEW ES 100 THP DESIGN DIAPRICE 15 16 NEW PROPELLERS CYCLE TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOWI PITCH THP 66778 67lvo 8 677 Iz 8 67 678 PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 B334568 845667 9456677 1045667 106W8W 106EW Ii4677/776 115W 11BEW 1167 124W 125W 1256 1356 1456 1556 164N 16678 April 1990 163 Performa TOP PERFO K&B ENGINES AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices RC PYLON RACING SERIES 500 DIAPITCHPRICE 75N 5N SERIES 400C 66677/o7¾ 9777 W WIDE BLADE EW EXTRA WIDE iJADDAW will keep lines taut Just dont try fly strong winds strong strong dont have magic yardstick can tell careful should also pull elevator arm off servo bellcrank doesnt put drag servo coreless servos have little inherent drag just doesnt make sense move unnec essarily fly Thingamabob tethered model youll probably pioneer mode Again rudder pushrod must tached rudder post Watch nose wheel doesnt turn model side circle little outv d turn ac ceptable inside turning isr . Unlike flying Control Line cant backpedal keep lines tight model veers cir cle can chop throttle give down elevatorand crash lower altitude tether goes through center guide wing tip Again recommend no less 50 ft line Use 021 braided line can check AMA Competition Regulations book find out acceptable ways connect control lines tether center post something unknown quantity post pictured article constructed Frank Ander son belongs organization Canadian equivalent AMA beautifully built welded stock freely operating swivel top large plate welded bottom Using two ordinary concrete blocks hold down Ive encountered no problem tip ping operating either grass pave ment Watch magazines since under stand marketing Franks unit may offing certainly has met expectations Other approaches tether center post certainly possible important thing keep mind safety Remember model should come off tether have no means maintaining level flight since despite throttle elevator control rudder locked right name Thingamabob coined good friend St Louis problem describing model just day friend cleverer knew What skipped right rather long stretch time name broke down didnt pick up meaning finally woke up realized said Thing-AMA-Bob Now know spent 30 years fifth gradeteaching Nonmodeler staff members AMA Headquarters have flown trainer have others hope enjoy much have Remembering its nothing fancy keeps things perspective should also noted model now property AMA turning over rights AMA made pro vision Any profits might accrue its use others would channeled promotion support youth activi ties within Academy Would like make kit design CL Aerobatics/McMiIIan Continued page 66 pits give some insight to make plane perform better under varying conditions Now some tips first concerns warps Everyone experiences problem plane plane What going deal few dos help preserve die-straight surface just completed starting cover paint Always paint/cover opposite side sur face quickly possible after doing first side drying process does induce uneven stress structure Store freshly painted plane its pieces after coat paint vertical po sition Out drying/curing pro cess basic plane adjust holding fix ture tail pointed straight up movable surfaces align holding jig hinge lines vertical have fixtures surfaces dont Unfortunately know bad things hap pen occasion warp will creep wayusually bow flap Try following procedure has worked well years What construct simple drying jig CAT NO 106 Proof Switch Retail S995 Add $125 shipping Send $150 catalog Michigan residents add 40/0 sales tax IMPROVE YOUR 1991 SWITCH OVER ej Proof Switch Positive Locking Prevents Arriving field dead batteries Accidental switching off before take-off Will vibrate apart causing loss radio Does require special mounts Works radios Ideal seaplanes completely water proof SEE YOUR LOCAL HOBBY DEALER unavailable locally send Bru Line Industries Inc 4mm PO Box 3786 Center Line MI 48015 Model Hardware iIibIr Worlds Moat Complete Hardware Catalog HOBBY SUPPLY SOUTH 5060 Glade Road Acworth GA 30101 14041 974-0843 164 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 SlOE Arrow Highway San Dimas CA 91773 FEATURING Fully illustrated manufalurers fuN line shown Hard*are tools paints adhesIves engines. invaluable reference pfoduct selection use Unique HSS brand products mn serious modeler$300 ppd
Edition: Model Aviation - 1990/04
Page Numbers: 62, 63, 64, 65, 163, 164
THIS IS definitely pretty model wasnt meant designed Thing amabob few simple goals mind model should very easy build rel atively inexpensive fly reasonably well also wanted airplane could flown number different configura tions Though wont fly FAI RC Aerobat ics pattern Thingamabob meets goals Its Dick Jane model will help beginner learn fly vesting large amounts time money project same time building airplanes will teach some basic con struction skills mind important consideration variety almost-ready-to-fly models readily avail able logic suggests individual has genuine interest hobby/sport aero modeling somewhere down road will need know build sides anytime invest something self just money project takes far importance meaning Thingamabob should noted no great marvel engineering wing airfoil example created LAR looks about right system People have commented construction bit flimsy sidea very astute quite correct observation Thingama bob wasnt designed survive crashes brick walls Models designed crash brick walls survive generally fly like brick walls techniques involved building Thingamabob represent basic skills will equip individual future construc tion projects giving him experience some problem areas arise model construction does fly new model question always comes up early game Its safe say trainer Thingamabob flies well Yes will loop Yes will rollassuming youre very pa tient have lot sky around air plane look rudder lack ai lerons youll understand patience comes handy Still Ive flown airplane invertedthough run U 62 Model Aviation Top No Thingamabob will never win beauty contest least its versatility makes tractive can easily converted tail-dragger nose-wheeler vica versa doesnt take great deal skill build fly whatever flight configuration control method choose incorporate Above author/designer/builder/flier Bob Under wood answer easy-to-build inexpensive easy-to-fly do-everything trainer Versatility key 25-size model Its great either engine power geared 05 electric motor airplane can flown free three-channel RC tethered simple RC nd isnt enough its built bellcrank can also flown Control Line also makes great training project model construction EBob Underwood eft Close-up view business end engine K&B 25 fuel tank taped its tray easy Electric conversion simply loosen four mounting bolts pull out tray unplug throttle servo Reverse process seven cells 05 electric motor quiet run Right multipurpose innards RC servos rear tether post sticking out side CL bellcrank next aft main landing gear shown its nose-wheeler position convert tail-dragger simply unbolt move forward remove nose wheel Right Whats name After long careful thought author decided Thing-AMA-Bob Get risk bending stick transmitter search down elevator strongly urge resist jazzing up Thingamabob doesnt need ailerons doesnt need anything powerful 25 glow engine geared 05 electric Construction youve done little build ing past may want throw some ersonal techniques equation ake things easierand thats fine cer ainly claim no particular expertise uilder honesty methods ave borrowed other modelers ver years Dont paint model older style overing painting technique quite ime-consuming usually quite heavy nstead purchase couple rolls plastic film have Just sure dont try make first model prettiest history mankind Invest much time youll probably afraid fly Remember creation member familyjust thing made out wood stuff Typically point magazine con struction article youll find two things happening case model like 10-engined Widget Stealth bomber author will indicate spe cific step-by-step directions unneces sary because project should tempted experienced mod eler often interpreted person built stick model 30 years ago kid folded paper airplane old contract work yesterday other approach juncture go very exact detail steps required build model dilemma approach take decided neither right Thingamabob Since might terested building would either abso lute newcomers no background what amounts scratch-building experi enced modelers want something use club trainer detailed step-by-step di rections didnt seem appropriate addition plans rendered John Hunton quite good Study along following explanations some specific techniques used building model Fuselage sides x 3 x 36-in balsa stock angle sliced off will note April 1990 63 Full-Size Plans AvailableSee Page 196 14 38 L1 IUIA TILE GAUGE dR BALSA 3U30 SHEETI US 3USD -lb -U-II UA-U ______________---____ ____ — T0 —II j IjjjlIU4SAAARE4_________ li _________ II _________ ii _________ _________DIHEDRAL GUSSET PUT PLY UlBFii ___________________ U ______ UL ______ ______ II ______ ______ IUT BALSA TIP 3U35 ALHITSUT PLTifif FIIII I]IIi3Z LEFT______d TO9TTYPCAWINGIIII liii BITBIBGNLT _____ ___ ___ ___02 IN __11____ 11 ____ A____ 5 ____ ___ ___ ii ___________ _____ _____Ufl IIIIHIIIIIIIIF r IIIIIIII I _______UAAU3UIApAtSA CENTERLINE SF WING5UIR HAROWUGO SOWELSIUIATALGAPUSROGO END OUIRSGUT FIRM BALSA SIDESSPAR WETHEUT-SUHINA HINE, SAFETY 41U4UDWD TOWEL NAT UT~1fBB ITAWALOLC bINSSE -Il-WV-ilAL TAOS-2I}--Up UT PLOF0 IApEETAREAFl 083 WIREHHI9lUG FLU083USTOTY IL LT\lBUANY lUGT TA GAIUATALSA ANTENNAlPIN LINE GUIDEIIULAJSERVO WASTER LISTAUTAT UT IJTEPLOUTBRLSAj APPER LIUDTALSA O LOWER BALAN O UPPER BUT BALSA TUE U LOWER SWITGH~TET3E0lUG [v32][b-1-10-1-10]] ATI'___ AEUDIri HOLE STUWOLSI= 1DBNYLON TASTING IRA IUTMWLI POSIT N 58-32BLIND NAY OBLINO NAT CLEARANCE WFAEL LINE CLEARA lUG WHEELA0lUG BUT TOWSlBA nose section has no plywood dou bler makes uncomfortable go ahead add /32 ply piece extending back wing hold-down dowel Another feature may make squirm tad angle break fuse lage sides behind wing wanted elim inate need bend fuselage sides joining tail building experience know what happens take two pieces dissimilar balsa try bend fuselage comes out looking like sideways airfoil leaning either right left once succeeded building fuselage remained straight way tail boy did look weird So technique Thingamabob make partial cut fuselage sides inside cracking inward come together tail exactly center Youll need sand sides former fits point has little V outside edges glue well advantage can draw simple line down building board very easily check whether fuselage straight Theres also less tendency harder wood might exist fuse lage side draw softer piece toward hard landing might separate fuse lage point say Right Just dont land hard nothing magical about tray behind firewall Old-timer modelers will recognize method used throw back old ignition days car ried coil condenser batteries what have get frequently often after flight youre planning alternate between us ing glow electric power build two firewalls trays way can easily switch flying field Use rubberbands strap hold tank place tray Drill mounting holes attach fire wall fuselage sandwiching 64 Model Aviation pieces plywood together before side piece glued fuselage dont chances almost thou sand more-to-one youll never get holes line up properly Its kind like cutting off chair legs last thought fuselage top tether post pictured des built Frank Anderson MAA del Aeronautics Association Cana Canadian equivalent AMA Its stock tree-wheeling swivel large welded plate bottom can easily ballasted concrete bhui simple wire line guide left wing tip two outside holes flying Control Line center hole tor tethered flight close-up shot underside stabilizer/elevator also shows perma nently installed fourth wheel tail wheel greatly simplifying tail-dragger conversion bottom sheeting can placed wood grain running either lengthwise across fuselage Placing crosswise pro vides little rigidity may help use up some scraps youd like save some time have nice big length hand wont hurt run grain long way Whoops point Note some plywood parts listed Lite Ply others nots critical parts used mount bellcrank Control Line flying Use standard fiveply aircraft-grade plywood spots wing can built flat board final stage tilting up panel es tablish dihedral may wish put shear webbing after have removed board Thats no problem Just remember run grain webbing top bottom wing Dont run grain spanwise because wont able its job can sand little angle trailing edge stock make glue joint little wider also makes trailing edge somewhat less blunt wing tips glued bottom edge tip rib tilted upward triangular pieces supporting Care fully sand off excess tips form extension curved top wing airfoil put proper amount dihedral wing pin panel building board raise other off board distance board bottom tip rib should four inches Dont get ex cited after glue sets find amount bit However concerned its much less Understand having no ailerons Thingamabob just wont want turn rudder-only un less youve put right amount dihe dral Trust know first wing built lesser amount dihedral order accommodate Control Line flight configuration Big mis take took country mile turn After covering wing will probably have some flat spots around curved por tion upper surface Such condition will spoil ahem fantastic flight characteristics Thingamabob assum ing someone can disc over Tail surfaces cant figure out what suggest take up golf General thoughts engine used prototype K&B Sportster 25 has worked well Its modest cost fits concept economical modeling project use K&B Id suggest purchasing extra radial mount Thats thing Ive broken model far Electric flight version have used seven-cell battery pack geared 05 mo tor Using throttle optional simply use on/off switch fly charge al Continued page 163 PORTA-Sl16PE AndilTRAXrWXEYZ kits use S/Vs have canopy track Its round sflat flies 30 Flying DISC STOL SUPERIOR SmaN Field FLY Aircraft STABLE PREDICTABLE AGILE $4 hipping TX Res add 7% sales tax VISA MIC Foam & Lite Ply Construction ELEVON Mixer Included 25- 45cid 335lbs Accurate QUALI1Y Materials FRTA-rSlIADEEEATUSES R9QMV ---- No center pole nearly 7 tall Opaque heat reflecting canopy Q0ik rLNU --- 5 Minutes Rell LIGttTMEIOHT ---- 6clO Wenaha 6 1/2 pounds VISAW31IDRESISTANTkolO Tested 40 MPH ADJUSTASLR ---- Level tilted aids 0AlID0LE ---- Two three can joined Econosy foil$3900 $400UPS Sportasan Rail$4395e $400UPS Dsnsng 9w10$5700 $400UPS Sportklng 9w18$9350e $050UPS Mach Tots-Tarp 4c6$ 795e $200UPS Trak-Lok-Kyc Kit TAA2$1000 $200UPS Trak-Lok-Eve Kit TAA3$1450 $200UPS FRE8 1-80042116264MCO13lEfQiJSilPQ~ ORDERS DEALERS 5 DISTRIBOTOR CALLS 209 SW eocv AVE OveR literature available BARThESVILLEOK 74003 4M Coepany products qo-33-9445 f.e Time Bonded Model Products Box 10998 Suite 543 Austin TX 78786 512 250-1420 512444-3368 April 1990 65 OT OLI H STAY COOL PERFECT SHADE AT THE FLYING FIELDTRACEOUT CAMPING OR AT THE LAKE OFF C SHADE TENT AT 1987 RATS FOR S/C FATIERN UDGES SHADE TENT AT 1988 RATS AT S/C PATERN SITES FOR OFF C S HEADQUARTERS TENTS AND TRANSMITTER IMPOUNDS Put Fun Back Fun Fly Got ROUN TUIT Today ONLY Money Back GUARANTEE Business get scale documentation Bell 204 model its work car speak Nonetheless its easy achieve final product detailed Mikes Hucy As can see Mike true craftsman Unfortunately particular model badly damaged Tan gerine Rot Mike bouncing back getting ready Nats right now Mike wish lot luck anxious see Nats model Please keep us posted interested Im contacting Bill Curtis get information various blades products Ill get update recent talk John Gorham brought up speed happenings GMP According John Americanization GMP complete including new main gear tail rotor gear box cooling shroud Thats lot tooling say necessity mother GMP able reach its goals short three months John says UMP kits stock Rebel entertaining large following John also mentioned new 40-size full-house machine make its debut Toledo Tentatively called Viper new Helicopter features light weight full aerobatic performance Im sorry column going short month Ive recently very busy large ducted-fan model Boeing 737-200 movie Im just now getting life back tofor mewhat normal would however like thank reading column have questions photos Helicopt ers dont drop line Ill sure try publish BCNU Dutch/Lehmberg Continued page 61 40A P-38G L F-80A B C Hudson Martin B-b B-lOB B-12 McDon nell F-lO1F North American BT-9B BC-i AT-6 6A through C A-36A B 25C H J P-51B D H Northrop A17 Piasecki H-21 Republic P-47C D N F-84E Severski BT-8 P 35 Supermarine Spitfire Va Vb Stearman PT-17 St Louis C&F PT15 Thomas-Morse O-19B C E Verville PT-bC Vultee BT 13A BTL5 Note some airplanes near Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPtR POSY RESIN K&B SUPER POSY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS duplicates Beech 18 C-45 AT-7 AT-il same basic airplane Cur tiss A-3B 0-16 differ armament rear seat equipment Vultee BT 13A BT-15 have different power plants etc its quite impressive list man career Thingamabob/Underwood Continued page 65 out dont have land deadstick Determining flight time ever will take some practice part Deciding locate on/off switch does present little problem mount fuselage side youll have demount time change elec tric glow back again put switch firewall under electric motor falls under heading dumb since exercise extreme caution keeping fingers out prop Dont flying Control Line use least 50 ft lengths 018 braided lines model will fly 60-ft lines no trouble Seventy-footers would probably stretch ing limits credibility thing must un less want screw yourself ground fill fuel tank 25 engine will run what seems like jillion hours four ounces fuel quite since flown much Control Line test flew Thingamabob version up about three four minutes dawned filled tank wouldnt know got beautiful fast engine run lasted almost 30 minutes mind-numbing dizzying circular flight Get syringe-type filler measure ounce two start Control Line version remove rudder pushrod servo attach rudder post will induce right turn rudder will keep model out end lines found unnecessary put weight out board wing tip right rudder small amount right thrust engine A monthly publication covering International RC Soaring Scene US $17 yr 21/yr 1st class In Canada/Mexico $22/yr US funds AsIa & Paclf Ic $28/yr US funds Europe UK $28/yr US funds Surface Mall ForeIgn $18/yr US funds RO SOARING DIGEST PO Box 1079 Payson AZ 85547 THE LEADE NEW ES 100 THP DESIGN DIAPRICE 15 16 NEW PROPELLERS CYCLE TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOWI PITCH THP 66778 67lvo 8 677 Iz 8 67 678 PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 B334568 845667 9456677 1045667 106W8W 106EW Ii4677/776 115W 11BEW 1167 124W 125W 1256 1356 1456 1556 164N 16678 April 1990 163 Performa TOP PERFO K&B ENGINES AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices RC PYLON RACING SERIES 500 DIAPITCHPRICE 75N 5N SERIES 400C 66677/o7¾ 9777 W WIDE BLADE EW EXTRA WIDE iJADDAW will keep lines taut Just dont try fly strong winds strong strong dont have magic yardstick can tell careful should also pull elevator arm off servo bellcrank doesnt put drag servo coreless servos have little inherent drag just doesnt make sense move unnec essarily fly Thingamabob tethered model youll probably pioneer mode Again rudder pushrod must tached rudder post Watch nose wheel doesnt turn model side circle little outv d turn ac ceptable inside turning isr . Unlike flying Control Line cant backpedal keep lines tight model veers cir cle can chop throttle give down elevatorand crash lower altitude tether goes through center guide wing tip Again recommend no less 50 ft line Use 021 braided line can check AMA Competition Regulations book find out acceptable ways connect control lines tether center post something unknown quantity post pictured article constructed Frank Ander son belongs organization Canadian equivalent AMA beautifully built welded stock freely operating swivel top large plate welded bottom Using two ordinary concrete blocks hold down Ive encountered no problem tip ping operating either grass pave ment Watch magazines since under stand marketing Franks unit may offing certainly has met expectations Other approaches tether center post certainly possible important thing keep mind safety Remember model should come off tether have no means maintaining level flight since despite throttle elevator control rudder locked right name Thingamabob coined good friend St Louis problem describing model just day friend cleverer knew What skipped right rather long stretch time name broke down didnt pick up meaning finally woke up realized said Thing-AMA-Bob Now know spent 30 years fifth gradeteaching Nonmodeler staff members AMA Headquarters have flown trainer have others hope enjoy much have Remembering its nothing fancy keeps things perspective should also noted model now property AMA turning over rights AMA made pro vision Any profits might accrue its use others would channeled promotion support youth activi ties within Academy Would like make kit design CL Aerobatics/McMiIIan Continued page 66 pits give some insight to make plane perform better under varying conditions Now some tips first concerns warps Everyone experiences problem plane plane What going deal few dos help preserve die-straight surface just completed starting cover paint Always paint/cover opposite side sur face quickly possible after doing first side drying process does induce uneven stress structure Store freshly painted plane its pieces after coat paint vertical po sition Out drying/curing pro cess basic plane adjust holding fix ture tail pointed straight up movable surfaces align holding jig hinge lines vertical have fixtures surfaces dont Unfortunately know bad things hap pen occasion warp will creep wayusually bow flap Try following procedure has worked well years What construct simple drying jig CAT NO 106 Proof Switch Retail S995 Add $125 shipping Send $150 catalog Michigan residents add 40/0 sales tax IMPROVE YOUR 1991 SWITCH OVER ej Proof Switch Positive Locking Prevents Arriving field dead batteries Accidental switching off before take-off Will vibrate apart causing loss radio Does require special mounts Works radios Ideal seaplanes completely water proof SEE YOUR LOCAL HOBBY DEALER unavailable locally send Bru Line Industries Inc 4mm PO Box 3786 Center Line MI 48015 Model Hardware iIibIr Worlds Moat Complete Hardware Catalog HOBBY SUPPLY SOUTH 5060 Glade Road Acworth GA 30101 14041 974-0843 164 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 SlOE Arrow Highway San Dimas CA 91773 FEATURING Fully illustrated manufalurers fuN line shown Hard*are tools paints adhesIves engines. invaluable reference pfoduct selection use Unique HSS brand products mn serious modeler$300 ppd
Edition: Model Aviation - 1990/04
Page Numbers: 62, 63, 64, 65, 163, 164
THIS IS definitely pretty model wasnt meant designed Thing amabob few simple goals mind model should very easy build rel atively inexpensive fly reasonably well also wanted airplane could flown number different configura tions Though wont fly FAI RC Aerobat ics pattern Thingamabob meets goals Its Dick Jane model will help beginner learn fly vesting large amounts time money project same time building airplanes will teach some basic con struction skills mind important consideration variety almost-ready-to-fly models readily avail able logic suggests individual has genuine interest hobby/sport aero modeling somewhere down road will need know build sides anytime invest something self just money project takes far importance meaning Thingamabob should noted no great marvel engineering wing airfoil example created LAR looks about right system People have commented construction bit flimsy sidea very astute quite correct observation Thingama bob wasnt designed survive crashes brick walls Models designed crash brick walls survive generally fly like brick walls techniques involved building Thingamabob represent basic skills will equip individual future construc tion projects giving him experience some problem areas arise model construction does fly new model question always comes up early game Its safe say trainer Thingamabob flies well Yes will loop Yes will rollassuming youre very pa tient have lot sky around air plane look rudder lack ai lerons youll understand patience comes handy Still Ive flown airplane invertedthough run U 62 Model Aviation Top No Thingamabob will never win beauty contest least its versatility makes tractive can easily converted tail-dragger nose-wheeler vica versa doesnt take great deal skill build fly whatever flight configuration control method choose incorporate Above author/designer/builder/flier Bob Under wood answer easy-to-build inexpensive easy-to-fly do-everything trainer Versatility key 25-size model Its great either engine power geared 05 electric motor airplane can flown free three-channel RC tethered simple RC nd isnt enough its built bellcrank can also flown Control Line also makes great training project model construction EBob Underwood eft Close-up view business end engine K&B 25 fuel tank taped its tray easy Electric conversion simply loosen four mounting bolts pull out tray unplug throttle servo Reverse process seven cells 05 electric motor quiet run Right multipurpose innards RC servos rear tether post sticking out side CL bellcrank next aft main landing gear shown its nose-wheeler position convert tail-dragger simply unbolt move forward remove nose wheel Right Whats name After long careful thought author decided Thing-AMA-Bob Get risk bending stick transmitter search down elevator strongly urge resist jazzing up Thingamabob doesnt need ailerons doesnt need anything powerful 25 glow engine geared 05 electric Construction youve done little build ing past may want throw some ersonal techniques equation ake things easierand thats fine cer ainly claim no particular expertise uilder honesty methods ave borrowed other modelers ver years Dont paint model older style overing painting technique quite ime-consuming usually quite heavy nstead purchase couple rolls plastic film have Just sure dont try make first model prettiest history mankind Invest much time youll probably afraid fly Remember creation member familyjust thing made out wood stuff Typically point magazine con struction article youll find two things happening case model like 10-engined Widget Stealth bomber author will indicate spe cific step-by-step directions unneces sary because project should tempted experienced mod eler often interpreted person built stick model 30 years ago kid folded paper airplane old contract work yesterday other approach juncture go very exact detail steps required build model dilemma approach take decided neither right Thingamabob Since might terested building would either abso lute newcomers no background what amounts scratch-building experi enced modelers want something use club trainer detailed step-by-step di rections didnt seem appropriate addition plans rendered John Hunton quite good Study along following explanations some specific techniques used building model Fuselage sides x 3 x 36-in balsa stock angle sliced off will note April 1990 63 Full-Size Plans AvailableSee Page 196 14 38 L1 IUIA TILE GAUGE dR BALSA 3U30 SHEETI US 3USD -lb -U-II UA-U ______________---____ ____ — T0 —II j IjjjlIU4SAAARE4_________ li _________ II _________ ii _________ _________DIHEDRAL GUSSET PUT PLY UlBFii ___________________ U ______ UL ______ ______ II ______ ______ IUT BALSA TIP 3U35 ALHITSUT PLTifif FIIII I]IIi3Z LEFT______d TO9TTYPCAWINGIIII liii BITBIBGNLT _____ ___ ___ ___02 IN __11____ 11 ____ A____ 5 ____ ___ ___ ii ___________ _____ _____Ufl IIIIHIIIIIIIIF r IIIIIIII I _______UAAU3UIApAtSA CENTERLINE SF WING5UIR HAROWUGO SOWELSIUIATALGAPUSROGO END OUIRSGUT FIRM BALSA SIDESSPAR WETHEUT-SUHINA HINE, SAFETY 41U4UDWD TOWEL NAT UT~1fBB ITAWALOLC bINSSE -Il-WV-ilAL TAOS-2I}--Up UT PLOF0 IApEETAREAFl 083 WIREHHI9lUG FLU083USTOTY IL LT\lBUANY lUGT TA GAIUATALSA ANTENNAlPIN LINE GUIDEIIULAJSERVO WASTER LISTAUTAT UT IJTEPLOUTBRLSAj APPER LIUDTALSA O LOWER BALAN O UPPER BUT BALSA TUE U LOWER SWITGH~TET3E0lUG [v32][b-1-10-1-10]] ATI'___ AEUDIri HOLE STUWOLSI= 1DBNYLON TASTING IRA IUTMWLI POSIT N 58-32BLIND NAY OBLINO NAT CLEARANCE WFAEL LINE CLEARA lUG WHEELA0lUG BUT TOWSlBA nose section has no plywood dou bler makes uncomfortable go ahead add /32 ply piece extending back wing hold-down dowel Another feature may make squirm tad angle break fuse lage sides behind wing wanted elim inate need bend fuselage sides joining tail building experience know what happens take two pieces dissimilar balsa try bend fuselage comes out looking like sideways airfoil leaning either right left once succeeded building fuselage remained straight way tail boy did look weird So technique Thingamabob make partial cut fuselage sides inside cracking inward come together tail exactly center Youll need sand sides former fits point has little V outside edges glue well advantage can draw simple line down building board very easily check whether fuselage straight Theres also less tendency harder wood might exist fuse lage side draw softer piece toward hard landing might separate fuse lage point say Right Just dont land hard nothing magical about tray behind firewall Old-timer modelers will recognize method used throw back old ignition days car ried coil condenser batteries what have get frequently often after flight youre planning alternate between us ing glow electric power build two firewalls trays way can easily switch flying field Use rubberbands strap hold tank place tray Drill mounting holes attach fire wall fuselage sandwiching 64 Model Aviation pieces plywood together before side piece glued fuselage dont chances almost thou sand more-to-one youll never get holes line up properly Its kind like cutting off chair legs last thought fuselage top tether post pictured des built Frank Anderson MAA del Aeronautics Association Cana Canadian equivalent AMA Its stock tree-wheeling swivel large welded plate bottom can easily ballasted concrete bhui simple wire line guide left wing tip two outside holes flying Control Line center hole tor tethered flight close-up shot underside stabilizer/elevator also shows perma nently installed fourth wheel tail wheel greatly simplifying tail-dragger conversion bottom sheeting can placed wood grain running either lengthwise across fuselage Placing crosswise pro vides little rigidity may help use up some scraps youd like save some time have nice big length hand wont hurt run grain long way Whoops point Note some plywood parts listed Lite Ply others nots critical parts used mount bellcrank Control Line flying Use standard fiveply aircraft-grade plywood spots wing can built flat board final stage tilting up panel es tablish dihedral may wish put shear webbing after have removed board Thats no problem Just remember run grain webbing top bottom wing Dont run grain spanwise because wont able its job can sand little angle trailing edge stock make glue joint little wider also makes trailing edge somewhat less blunt wing tips glued bottom edge tip rib tilted upward triangular pieces supporting Care fully sand off excess tips form extension curved top wing airfoil put proper amount dihedral wing pin panel building board raise other off board distance board bottom tip rib should four inches Dont get ex cited after glue sets find amount bit However concerned its much less Understand having no ailerons Thingamabob just wont want turn rudder-only un less youve put right amount dihe dral Trust know first wing built lesser amount dihedral order accommodate Control Line flight configuration Big mis take took country mile turn After covering wing will probably have some flat spots around curved por tion upper surface Such condition will spoil ahem fantastic flight characteristics Thingamabob assum ing someone can disc over Tail surfaces cant figure out what suggest take up golf General thoughts engine used prototype K&B Sportster 25 has worked well Its modest cost fits concept economical modeling project use K&B Id suggest purchasing extra radial mount Thats thing Ive broken model far Electric flight version have used seven-cell battery pack geared 05 mo tor Using throttle optional simply use on/off switch fly charge al Continued page 163 PORTA-Sl16PE AndilTRAXrWXEYZ kits use S/Vs have canopy track Its round sflat flies 30 Flying DISC STOL SUPERIOR SmaN Field FLY Aircraft STABLE PREDICTABLE AGILE $4 hipping TX Res add 7% sales tax VISA MIC Foam & Lite Ply Construction ELEVON Mixer Included 25- 45cid 335lbs Accurate QUALI1Y Materials FRTA-rSlIADEEEATUSES R9QMV ---- No center pole nearly 7 tall Opaque heat reflecting canopy Q0ik rLNU --- 5 Minutes Rell LIGttTMEIOHT ---- 6clO Wenaha 6 1/2 pounds VISAW31IDRESISTANTkolO Tested 40 MPH ADJUSTASLR ---- Level tilted aids 0AlID0LE ---- Two three can joined Econosy foil$3900 $400UPS Sportasan Rail$4395e $400UPS Dsnsng 9w10$5700 $400UPS Sportklng 9w18$9350e $050UPS Mach Tots-Tarp 4c6$ 795e $200UPS Trak-Lok-Kyc Kit TAA2$1000 $200UPS Trak-Lok-Eve Kit TAA3$1450 $200UPS FRE8 1-80042116264MCO13lEfQiJSilPQ~ ORDERS DEALERS 5 DISTRIBOTOR CALLS 209 SW eocv AVE OveR literature available BARThESVILLEOK 74003 4M Coepany products qo-33-9445 f.e Time Bonded Model Products Box 10998 Suite 543 Austin TX 78786 512 250-1420 512444-3368 April 1990 65 OT OLI H STAY COOL PERFECT SHADE AT THE FLYING FIELDTRACEOUT CAMPING OR AT THE LAKE OFF C SHADE TENT AT 1987 RATS FOR S/C FATIERN UDGES SHADE TENT AT 1988 RATS AT S/C PATERN SITES FOR OFF C S HEADQUARTERS TENTS AND TRANSMITTER IMPOUNDS Put Fun Back Fun Fly Got ROUN TUIT Today ONLY Money Back GUARANTEE Business get scale documentation Bell 204 model its work car speak Nonetheless its easy achieve final product detailed Mikes Hucy As can see Mike true craftsman Unfortunately particular model badly damaged Tan gerine Rot Mike bouncing back getting ready Nats right now Mike wish lot luck anxious see Nats model Please keep us posted interested Im contacting Bill Curtis get information various blades products Ill get update recent talk John Gorham brought up speed happenings GMP According John Americanization GMP complete including new main gear tail rotor gear box cooling shroud Thats lot tooling say necessity mother GMP able reach its goals short three months John says UMP kits stock Rebel entertaining large following John also mentioned new 40-size full-house machine make its debut Toledo Tentatively called Viper new Helicopter features light weight full aerobatic performance Im sorry column going short month Ive recently very busy large ducted-fan model Boeing 737-200 movie Im just now getting life back tofor mewhat normal would however like thank reading column have questions photos Helicopt ers dont drop line Ill sure try publish BCNU Dutch/Lehmberg Continued page 61 40A P-38G L F-80A B C Hudson Martin B-b B-lOB B-12 McDon nell F-lO1F North American BT-9B BC-i AT-6 6A through C A-36A B 25C H J P-51B D H Northrop A17 Piasecki H-21 Republic P-47C D N F-84E Severski BT-8 P 35 Supermarine Spitfire Va Vb Stearman PT-17 St Louis C&F PT15 Thomas-Morse O-19B C E Verville PT-bC Vultee BT 13A BTL5 Note some airplanes near Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPtR POSY RESIN K&B SUPER POSY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS duplicates Beech 18 C-45 AT-7 AT-il same basic airplane Cur tiss A-3B 0-16 differ armament rear seat equipment Vultee BT 13A BT-15 have different power plants etc its quite impressive list man career Thingamabob/Underwood Continued page 65 out dont have land deadstick Determining flight time ever will take some practice part Deciding locate on/off switch does present little problem mount fuselage side youll have demount time change elec tric glow back again put switch firewall under electric motor falls under heading dumb since exercise extreme caution keeping fingers out prop Dont flying Control Line use least 50 ft lengths 018 braided lines model will fly 60-ft lines no trouble Seventy-footers would probably stretch ing limits credibility thing must un less want screw yourself ground fill fuel tank 25 engine will run what seems like jillion hours four ounces fuel quite since flown much Control Line test flew Thingamabob version up about three four minutes dawned filled tank wouldnt know got beautiful fast engine run lasted almost 30 minutes mind-numbing dizzying circular flight Get syringe-type filler measure ounce two start Control Line version remove rudder pushrod servo attach rudder post will induce right turn rudder will keep model out end lines found unnecessary put weight out board wing tip right rudder small amount right thrust engine A monthly publication covering International RC Soaring Scene US $17 yr 21/yr 1st class In Canada/Mexico $22/yr US funds AsIa & Paclf Ic $28/yr US funds Europe UK $28/yr US funds Surface Mall ForeIgn $18/yr US funds RO SOARING DIGEST PO Box 1079 Payson AZ 85547 THE LEADE NEW ES 100 THP DESIGN DIAPRICE 15 16 NEW PROPELLERS CYCLE TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOWI PITCH THP 66778 67lvo 8 677 Iz 8 67 678 PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 B334568 845667 9456677 1045667 106W8W 106EW Ii4677/776 115W 11BEW 1167 124W 125W 1256 1356 1456 1556 164N 16678 April 1990 163 Performa TOP PERFO K&B ENGINES AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices RC PYLON RACING SERIES 500 DIAPITCHPRICE 75N 5N SERIES 400C 66677/o7¾ 9777 W WIDE BLADE EW EXTRA WIDE iJADDAW will keep lines taut Just dont try fly strong winds strong strong dont have magic yardstick can tell careful should also pull elevator arm off servo bellcrank doesnt put drag servo coreless servos have little inherent drag just doesnt make sense move unnec essarily fly Thingamabob tethered model youll probably pioneer mode Again rudder pushrod must tached rudder post Watch nose wheel doesnt turn model side circle little outv d turn ac ceptable inside turning isr . Unlike flying Control Line cant backpedal keep lines tight model veers cir cle can chop throttle give down elevatorand crash lower altitude tether goes through center guide wing tip Again recommend no less 50 ft line Use 021 braided line can check AMA Competition Regulations book find out acceptable ways connect control lines tether center post something unknown quantity post pictured article constructed Frank Ander son belongs organization Canadian equivalent AMA beautifully built welded stock freely operating swivel top large plate welded bottom Using two ordinary concrete blocks hold down Ive encountered no problem tip ping operating either grass pave ment Watch magazines since under stand marketing Franks unit may offing certainly has met expectations Other approaches tether center post certainly possible important thing keep mind safety Remember model should come off tether have no means maintaining level flight since despite throttle elevator control rudder locked right name Thingamabob coined good friend St Louis problem describing model just day friend cleverer knew What skipped right rather long stretch time name broke down didnt pick up meaning finally woke up realized said Thing-AMA-Bob Now know spent 30 years fifth gradeteaching Nonmodeler staff members AMA Headquarters have flown trainer have others hope enjoy much have Remembering its nothing fancy keeps things perspective should also noted model now property AMA turning over rights AMA made pro vision Any profits might accrue its use others would channeled promotion support youth activi ties within Academy Would like make kit design CL Aerobatics/McMiIIan Continued page 66 pits give some insight to make plane perform better under varying conditions Now some tips first concerns warps Everyone experiences problem plane plane What going deal few dos help preserve die-straight surface just completed starting cover paint Always paint/cover opposite side sur face quickly possible after doing first side drying process does induce uneven stress structure Store freshly painted plane its pieces after coat paint vertical po sition Out drying/curing pro cess basic plane adjust holding fix ture tail pointed straight up movable surfaces align holding jig hinge lines vertical have fixtures surfaces dont Unfortunately know bad things hap pen occasion warp will creep wayusually bow flap Try following procedure has worked well years What construct simple drying jig CAT NO 106 Proof Switch Retail S995 Add $125 shipping Send $150 catalog Michigan residents add 40/0 sales tax IMPROVE YOUR 1991 SWITCH OVER ej Proof Switch Positive Locking Prevents Arriving field dead batteries Accidental switching off before take-off Will vibrate apart causing loss radio Does require special mounts Works radios Ideal seaplanes completely water proof SEE YOUR LOCAL HOBBY DEALER unavailable locally send Bru Line Industries Inc 4mm PO Box 3786 Center Line MI 48015 Model Hardware iIibIr Worlds Moat Complete Hardware Catalog HOBBY SUPPLY SOUTH 5060 Glade Road Acworth GA 30101 14041 974-0843 164 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 SlOE Arrow Highway San Dimas CA 91773 FEATURING Fully illustrated manufalurers fuN line shown Hard*are tools paints adhesIves engines. invaluable reference pfoduct selection use Unique HSS brand products mn serious modeler$300 ppd
Edition: Model Aviation - 1990/04
Page Numbers: 62, 63, 64, 65, 163, 164
THIS IS definitely pretty model wasnt meant designed Thing amabob few simple goals mind model should very easy build rel atively inexpensive fly reasonably well also wanted airplane could flown number different configura tions Though wont fly FAI RC Aerobat ics pattern Thingamabob meets goals Its Dick Jane model will help beginner learn fly vesting large amounts time money project same time building airplanes will teach some basic con struction skills mind important consideration variety almost-ready-to-fly models readily avail able logic suggests individual has genuine interest hobby/sport aero modeling somewhere down road will need know build sides anytime invest something self just money project takes far importance meaning Thingamabob should noted no great marvel engineering wing airfoil example created LAR looks about right system People have commented construction bit flimsy sidea very astute quite correct observation Thingama bob wasnt designed survive crashes brick walls Models designed crash brick walls survive generally fly like brick walls techniques involved building Thingamabob represent basic skills will equip individual future construc tion projects giving him experience some problem areas arise model construction does fly new model question always comes up early game Its safe say trainer Thingamabob flies well Yes will loop Yes will rollassuming youre very pa tient have lot sky around air plane look rudder lack ai lerons youll understand patience comes handy Still Ive flown airplane invertedthough run U 62 Model Aviation Top No Thingamabob will never win beauty contest least its versatility makes tractive can easily converted tail-dragger nose-wheeler vica versa doesnt take great deal skill build fly whatever flight configuration control method choose incorporate Above author/designer/builder/flier Bob Under wood answer easy-to-build inexpensive easy-to-fly do-everything trainer Versatility key 25-size model Its great either engine power geared 05 electric motor airplane can flown free three-channel RC tethered simple RC nd isnt enough its built bellcrank can also flown Control Line also makes great training project model construction EBob Underwood eft Close-up view business end engine K&B 25 fuel tank taped its tray easy Electric conversion simply loosen four mounting bolts pull out tray unplug throttle servo Reverse process seven cells 05 electric motor quiet run Right multipurpose innards RC servos rear tether post sticking out side CL bellcrank next aft main landing gear shown its nose-wheeler position convert tail-dragger simply unbolt move forward remove nose wheel Right Whats name After long careful thought author decided Thing-AMA-Bob Get risk bending stick transmitter search down elevator strongly urge resist jazzing up Thingamabob doesnt need ailerons doesnt need anything powerful 25 glow engine geared 05 electric Construction youve done little build ing past may want throw some ersonal techniques equation ake things easierand thats fine cer ainly claim no particular expertise uilder honesty methods ave borrowed other modelers ver years Dont paint model older style overing painting technique quite ime-consuming usually quite heavy nstead purchase couple rolls plastic film have Just sure dont try make first model prettiest history mankind Invest much time youll probably afraid fly Remember creation member familyjust thing made out wood stuff Typically point magazine con struction article youll find two things happening case model like 10-engined Widget Stealth bomber author will indicate spe cific step-by-step directions unneces sary because project should tempted experienced mod eler often interpreted person built stick model 30 years ago kid folded paper airplane old contract work yesterday other approach juncture go very exact detail steps required build model dilemma approach take decided neither right Thingamabob Since might terested building would either abso lute newcomers no background what amounts scratch-building experi enced modelers want something use club trainer detailed step-by-step di rections didnt seem appropriate addition plans rendered John Hunton quite good Study along following explanations some specific techniques used building model Fuselage sides x 3 x 36-in balsa stock angle sliced off will note April 1990 63 Full-Size Plans AvailableSee Page 196 14 38 L1 IUIA TILE GAUGE dR BALSA 3U30 SHEETI US 3USD -lb -U-II UA-U ______________---____ ____ — T0 —II j IjjjlIU4SAAARE4_________ li _________ II _________ ii _________ _________DIHEDRAL GUSSET PUT PLY UlBFii ___________________ U ______ UL ______ ______ II ______ ______ IUT BALSA TIP 3U35 ALHITSUT PLTifif FIIII I]IIi3Z LEFT______d TO9TTYPCAWINGIIII liii BITBIBGNLT _____ ___ ___ ___02 IN __11____ 11 ____ A____ 5 ____ ___ ___ ii ___________ _____ _____Ufl IIIIHIIIIIIIIF r IIIIIIII I _______UAAU3UIApAtSA CENTERLINE SF WING5UIR HAROWUGO SOWELSIUIATALGAPUSROGO END OUIRSGUT FIRM BALSA SIDESSPAR WETHEUT-SUHINA HINE, SAFETY 41U4UDWD TOWEL NAT UT~1fBB ITAWALOLC bINSSE -Il-WV-ilAL TAOS-2I}--Up UT PLOF0 IApEETAREAFl 083 WIREHHI9lUG FLU083USTOTY IL LT\lBUANY lUGT TA GAIUATALSA ANTENNAlPIN LINE GUIDEIIULAJSERVO WASTER LISTAUTAT UT IJTEPLOUTBRLSAj APPER LIUDTALSA O LOWER BALAN O UPPER BUT BALSA TUE U LOWER SWITGH~TET3E0lUG [v32][b-1-10-1-10]] ATI'___ AEUDIri HOLE STUWOLSI= 1DBNYLON TASTING IRA IUTMWLI POSIT N 58-32BLIND NAY OBLINO NAT CLEARANCE WFAEL LINE CLEARA lUG WHEELA0lUG BUT TOWSlBA nose section has no plywood dou bler makes uncomfortable go ahead add /32 ply piece extending back wing hold-down dowel Another feature may make squirm tad angle break fuse lage sides behind wing wanted elim inate need bend fuselage sides joining tail building experience know what happens take two pieces dissimilar balsa try bend fuselage comes out looking like sideways airfoil leaning either right left once succeeded building fuselage remained straight way tail boy did look weird So technique Thingamabob make partial cut fuselage sides inside cracking inward come together tail exactly center Youll need sand sides former fits point has little V outside edges glue well advantage can draw simple line down building board very easily check whether fuselage straight Theres also less tendency harder wood might exist fuse lage side draw softer piece toward hard landing might separate fuse lage point say Right Just dont land hard nothing magical about tray behind firewall Old-timer modelers will recognize method used throw back old ignition days car ried coil condenser batteries what have get frequently often after flight youre planning alternate between us ing glow electric power build two firewalls trays way can easily switch flying field Use rubberbands strap hold tank place tray Drill mounting holes attach fire wall fuselage sandwiching 64 Model Aviation pieces plywood together before side piece glued fuselage dont chances almost thou sand more-to-one youll never get holes line up properly Its kind like cutting off chair legs last thought fuselage top tether post pictured des built Frank Anderson MAA del Aeronautics Association Cana Canadian equivalent AMA Its stock tree-wheeling swivel large welded plate bottom can easily ballasted concrete bhui simple wire line guide left wing tip two outside holes flying Control Line center hole tor tethered flight close-up shot underside stabilizer/elevator also shows perma nently installed fourth wheel tail wheel greatly simplifying tail-dragger conversion bottom sheeting can placed wood grain running either lengthwise across fuselage Placing crosswise pro vides little rigidity may help use up some scraps youd like save some time have nice big length hand wont hurt run grain long way Whoops point Note some plywood parts listed Lite Ply others nots critical parts used mount bellcrank Control Line flying Use standard fiveply aircraft-grade plywood spots wing can built flat board final stage tilting up panel es tablish dihedral may wish put shear webbing after have removed board Thats no problem Just remember run grain webbing top bottom wing Dont run grain spanwise because wont able its job can sand little angle trailing edge stock make glue joint little wider also makes trailing edge somewhat less blunt wing tips glued bottom edge tip rib tilted upward triangular pieces supporting Care fully sand off excess tips form extension curved top wing airfoil put proper amount dihedral wing pin panel building board raise other off board distance board bottom tip rib should four inches Dont get ex cited after glue sets find amount bit However concerned its much less Understand having no ailerons Thingamabob just wont want turn rudder-only un less youve put right amount dihe dral Trust know first wing built lesser amount dihedral order accommodate Control Line flight configuration Big mis take took country mile turn After covering wing will probably have some flat spots around curved por tion upper surface Such condition will spoil ahem fantastic flight characteristics Thingamabob assum ing someone can disc over Tail surfaces cant figure out what suggest take up golf General thoughts engine used prototype K&B Sportster 25 has worked well Its modest cost fits concept economical modeling project use K&B Id suggest purchasing extra radial mount Thats thing Ive broken model far Electric flight version have used seven-cell battery pack geared 05 mo tor Using throttle optional simply use on/off switch fly charge al Continued page 163 PORTA-Sl16PE AndilTRAXrWXEYZ kits use S/Vs have canopy track Its round sflat flies 30 Flying DISC STOL SUPERIOR SmaN Field FLY Aircraft STABLE PREDICTABLE AGILE $4 hipping TX Res add 7% sales tax VISA MIC Foam & Lite Ply Construction ELEVON Mixer Included 25- 45cid 335lbs Accurate QUALI1Y Materials FRTA-rSlIADEEEATUSES R9QMV ---- No center pole nearly 7 tall Opaque heat reflecting canopy Q0ik rLNU --- 5 Minutes Rell LIGttTMEIOHT ---- 6clO Wenaha 6 1/2 pounds VISAW31IDRESISTANTkolO Tested 40 MPH ADJUSTASLR ---- Level tilted aids 0AlID0LE ---- Two three can joined Econosy foil$3900 $400UPS Sportasan Rail$4395e $400UPS Dsnsng 9w10$5700 $400UPS Sportklng 9w18$9350e $050UPS Mach Tots-Tarp 4c6$ 795e $200UPS Trak-Lok-Kyc Kit TAA2$1000 $200UPS Trak-Lok-Eve Kit TAA3$1450 $200UPS FRE8 1-80042116264MCO13lEfQiJSilPQ~ ORDERS DEALERS 5 DISTRIBOTOR CALLS 209 SW eocv AVE OveR literature available BARThESVILLEOK 74003 4M Coepany products qo-33-9445 f.e Time Bonded Model Products Box 10998 Suite 543 Austin TX 78786 512 250-1420 512444-3368 April 1990 65 OT OLI H STAY COOL PERFECT SHADE AT THE FLYING FIELDTRACEOUT CAMPING OR AT THE LAKE OFF C SHADE TENT AT 1987 RATS FOR S/C FATIERN UDGES SHADE TENT AT 1988 RATS AT S/C PATERN SITES FOR OFF C S HEADQUARTERS TENTS AND TRANSMITTER IMPOUNDS Put Fun Back Fun Fly Got ROUN TUIT Today ONLY Money Back GUARANTEE Business get scale documentation Bell 204 model its work car speak Nonetheless its easy achieve final product detailed Mikes Hucy As can see Mike true craftsman Unfortunately particular model badly damaged Tan gerine Rot Mike bouncing back getting ready Nats right now Mike wish lot luck anxious see Nats model Please keep us posted interested Im contacting Bill Curtis get information various blades products Ill get update recent talk John Gorham brought up speed happenings GMP According John Americanization GMP complete including new main gear tail rotor gear box cooling shroud Thats lot tooling say necessity mother GMP able reach its goals short three months John says UMP kits stock Rebel entertaining large following John also mentioned new 40-size full-house machine make its debut Toledo Tentatively called Viper new Helicopter features light weight full aerobatic performance Im sorry column going short month Ive recently very busy large ducted-fan model Boeing 737-200 movie Im just now getting life back tofor mewhat normal would however like thank reading column have questions photos Helicopt ers dont drop line Ill sure try publish BCNU Dutch/Lehmberg Continued page 61 40A P-38G L F-80A B C Hudson Martin B-b B-lOB B-12 McDon nell F-lO1F North American BT-9B BC-i AT-6 6A through C A-36A B 25C H J P-51B D H Northrop A17 Piasecki H-21 Republic P-47C D N F-84E Severski BT-8 P 35 Supermarine Spitfire Va Vb Stearman PT-17 St Louis C&F PT15 Thomas-Morse O-19B C E Verville PT-bC Vultee BT 13A BTL5 Note some airplanes near Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPtR POSY RESIN K&B SUPER POSY THINNER K&B SUPER POXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS duplicates Beech 18 C-45 AT-7 AT-il same basic airplane Cur tiss A-3B 0-16 differ armament rear seat equipment Vultee BT 13A BT-15 have different power plants etc its quite impressive list man career Thingamabob/Underwood Continued page 65 out dont have land deadstick Determining flight time ever will take some practice part Deciding locate on/off switch does present little problem mount fuselage side youll have demount time change elec tric glow back again put switch firewall under electric motor falls under heading dumb since exercise extreme caution keeping fingers out prop Dont flying Control Line use least 50 ft lengths 018 braided lines model will fly 60-ft lines no trouble Seventy-footers would probably stretch ing limits credibility thing must un less want screw yourself ground fill fuel tank 25 engine will run what seems like jillion hours four ounces fuel quite since flown much Control Line test flew Thingamabob version up about three four minutes dawned filled tank wouldnt know got beautiful fast engine run lasted almost 30 minutes mind-numbing dizzying circular flight Get syringe-type filler measure ounce two start Control Line version remove rudder pushrod servo attach rudder post will induce right turn rudder will keep model out end lines found unnecessary put weight out board wing tip right rudder small amount right thrust engine A monthly publication covering International RC Soaring Scene US $17 yr 21/yr 1st class In Canada/Mexico $22/yr US funds AsIa & Paclf Ic $28/yr US funds Europe UK $28/yr US funds Surface Mall ForeIgn $18/yr US funds RO SOARING DIGEST PO Box 1079 Payson AZ 85547 THE LEADE NEW ES 100 THP DESIGN DIAPRICE 15 16 NEW PROPELLERS CYCLE TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOWI PITCH THP 66778 67lvo 8 677 Iz 8 67 678 PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUELPROOFHIGH LUSTER FINISH DIAPITCH PRICE 534 634 72633456 B334568 845667 9456677 1045667 106W8W 106EW Ii4677/776 115W 11BEW 1167 124W 125W 1256 1356 1456 1556 164N 16678 April 1990 163 Performa TOP PERFO K&B ENGINES AirplaneMarine K&B FUELSK&B GLOW PLUGS 9 Blends4 Choices RC PYLON RACING SERIES 500 DIAPITCHPRICE 75N 5N SERIES 400C 66677/o7¾ 9777 W WIDE BLADE EW EXTRA WIDE iJADDAW will keep lines taut Just dont try fly strong winds strong strong dont have magic yardstick can tell careful should also pull elevator arm off servo bellcrank doesnt put drag servo coreless servos have little inherent drag just doesnt make sense move unnec essarily fly Thingamabob tethered model youll probably pioneer mode Again rudder pushrod must tached rudder post Watch nose wheel doesnt turn model side circle little outv d turn ac ceptable inside turning isr . Unlike flying Control Line cant backpedal keep lines tight model veers cir cle can chop throttle give down elevatorand crash lower altitude tether goes through center guide wing tip Again recommend no less 50 ft line Use 021 braided line can check AMA Competition Regulations book find out acceptable ways connect control lines tether center post something unknown quantity post pictured article constructed Frank Ander son belongs organization Canadian equivalent AMA beautifully built welded stock freely operating swivel top large plate welded bottom Using two ordinary concrete blocks hold down Ive encountered no problem tip ping operating either grass pave ment Watch magazines since under stand marketing Franks unit may offing certainly has met expectations Other approaches tether center post certainly possible important thing keep mind safety Remember model should come off tether have no means maintaining level flight since despite throttle elevator control rudder locked right name Thingamabob coined good friend St Louis problem describing model just day friend cleverer knew What skipped right rather long stretch time name broke down didnt pick up meaning finally woke up realized said Thing-AMA-Bob Now know spent 30 years fifth gradeteaching Nonmodeler staff members AMA Headquarters have flown trainer have others hope enjoy much have Remembering its nothing fancy keeps things perspective should also noted model now property AMA turning over rights AMA made pro vision Any profits might accrue its use others would channeled promotion support youth activi ties within Academy Would like make kit design CL Aerobatics/McMiIIan Continued page 66 pits give some insight to make plane perform better under varying conditions Now some tips first concerns warps Everyone experiences problem plane plane What going deal few dos help preserve die-straight surface just completed starting cover paint Always paint/cover opposite side sur face quickly possible after doing first side drying process does induce uneven stress structure Store freshly painted plane its pieces after coat paint vertical po sition Out drying/curing pro cess basic plane adjust holding fix ture tail pointed straight up movable surfaces align holding jig hinge lines vertical have fixtures surfaces dont Unfortunately know bad things hap pen occasion warp will creep wayusually bow flap Try following procedure has worked well years What construct simple drying jig CAT NO 106 Proof Switch Retail S995 Add $125 shipping Send $150 catalog Michigan residents add 40/0 sales tax IMPROVE YOUR 1991 SWITCH OVER ej Proof Switch Positive Locking Prevents Arriving field dead batteries Accidental switching off before take-off Will vibrate apart causing loss radio Does require special mounts Works radios Ideal seaplanes completely water proof SEE YOUR LOCAL HOBBY DEALER unavailable locally send Bru Line Industries Inc 4mm PO Box 3786 Center Line MI 48015 Model Hardware iIibIr Worlds Moat Complete Hardware Catalog HOBBY SUPPLY SOUTH 5060 Glade Road Acworth GA 30101 14041 974-0843 164 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 SlOE Arrow Highway San Dimas CA 91773 FEATURING Fully illustrated manufalurers fuN line shown Hard*are tools paints adhesIves engines. invaluable reference pfoduct selection use Unique HSS brand products mn serious modeler$300 ppd