Radio Control: Soaring

Radio Control SOARING Dan Pruss RAN across item just head up theme months column Its called simply Battery Disconnect Switch winch designs include shut off switch between foot pedal sole noid have yet see device kills power directly battery except course youre relies yank ing cable battery on/off switch affects foot pedal provides some element safety allowing winch energized during retrievals example usually no way stop runaway winchwhich occurs solenoid decides weld its insides together have ever tween upwind pulley winch drum has happened have no battle scars show consider yourself lucky RC Soaring probably has best track records safety over past 15 years consider number launches have made Lets see 5000-plus LSF members times average what 100 200 launches Thats between half million launches Granted flights have via other means winches million figure probably still conservative dont know regard winch lines safety CD few fun-flys scribe can attest line whistling along just above ankle height can send chill through bones balmiest thermal-producing days example what winch line could actually happened high-start cident occurred out East about 12 years ago Towards end afternoon flying 52 Model Aviation Another goody Gary Hutchison AI-Tec Products its wing-joiner use Al-I-Spar/Ti-jointer products didnt see February 1983 Soaring column well explain Al-I-Spar rugged wing spar formed I-beam shape 018 aluminum sheet top bottom flanges spar formed holilow boxes Ti-jointer titanium strap slides hollow spar-flange straps also available AI-jointers made 090 aluminum Normally youd use Ti-jointer place plug-in wires plug-in-type wing picture-sequence shown Ti-jointers permanently fixed Al-I-spars C-shaped aluminum block locks jointer-tabs together gripping notches jointers see photo upper left middle photo above gives view looking forward wing-mount area Garys Sagitta 900 Hes removed back box captures C-block can have better look simple structural parts fuselage needed device photo right above Garys about slip C-block placealthough hasnt seated wings place yet view nose looking aft photo left below C-block being inserted its holder wings still seated last photo below right shows spar-joint area fuselage object left C-block box Garys new Motion Transfer Modules two screws will used clamp aileron pushrod ends MTM Dan featured item last months column photos Bruce Cornelius wind shift during launch caused line drift across road drape over barbed wire fence other side road Seconds later car came along line caught over cars hood car coming stop line dragged across hood parachute snarled fence post high-start rubber stretched beyond its limit broke sound like crack bull whip Meanwhile chute still caught fence post nylon line sawed its way through cars hood line 200-ft band saw blade battery disconnect switch wouldnt have prevented incident example does indicate degree danger present runaway tow line source prevention such occurrence Bat tery Disconnect Switch shown photo Designed use motor coaches trucks off-highway vehicles auxiliary gener ators unit just what weve look ing shut winch battery off source units current rating 400 amps con tinuous surge current rating 2000 amps Its also rated 50 volts AC DC New goody guy Gary Hutchison just doesnt stop Now has wing joiner like no other used Al-I-Spar little fitting does neatest job joining two wing halves ever saw Back February 1983 column Al-I-Spar new-item feature showed versatility spar design spars recall formed N single sheet aluminum shape spar resembles beam prin Continued poge 157 NORMAL SECTION J lyj- FLAPERON LINKAGE BY MEYER GUTMAN MONOKOTE-2 oHINGE PLY ROOT I/B HOLE 1/8 TB1/16PLY BLOCK PLYTl 1 A/HOLE 75- 80 HORNS ARE 030 X 1/4 K&S BRASSA B Coulter Watt 19B2 INSERT 1/16 MUSIC WIRE INTO THE 1/16 LD BRASS BEARING TUBENOW BEND THE CENTER TO 60 INSERT THROUGH FUSELAGE THE PLY BLOCK AND THE HORNS EPOXY THE 1/16 tO BRASS BEARING TUBE INTO THE PLY BLOCK INSERT THE 3/32 ID TORQUE TUBES SOLDER ON THE HORNS SOLDER THE 3/4 LONG 1/16 WIRES INTO B HORN NOW SPOT SOLDER B HORNS ONTO THE TORQUETUBESSOTHATHORNS A& B ARE AT 75 TO 80 DEGREES AND EQUAL ON BOTH SIDES USE STAY-BRITE LOW TEMP SOLDER \ PIVOT TUBE 1/16 ID EPOXY TO FLAPERON WIRE 301040 IFUSELAGE 1/163/32 ID BRASS BEARING TUBETORQUE TUBE Meyer Gutmans clever flaperon linkage works well plug-in wings minimum fuss rigging Another feature B horns put no chordwise stress hingesthat little 1/16-in pin apex B horn lifts depresses trailing edge surface effect control inputsee little hole near TE ply root rib Now Kit Form Saveteven easy assemble 4 channel kit expandable 7 OnIy$ 7995 service parts available past manu factured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Free servo reversing Hobby Lobby radios included service work Full Command Systems509 487-2122 908 E Rosewood Spokane WA 99207 September 1983 53 GIANT SCALE & SPORT PLANS SETS & KITS ins truction manual bs fselage formers - j already Oho prices parts J B Special MK 4 Convertible 84 Monoplane 78 Biplane Weighs 18 lbs Low Wing Biplane ft Parasol Plans $1700Plans $1700 Partial Kit $8500 EitherBoth Partial Kit $9500 Travel Air 2000 105 Classic Scale Biplane Wt 23 lbs Plans $1700Partial Kit $13000 Travel Air 4000 99 Radial Eng Classic Biplane 23 lbs Plans $1700Partial Kit $13000 Fokker 0-VII 88 German WWI Fighter Biplane 23 lbs Plans $1700Partial Kit $13000 Sopwith Tripehound80 WWI Triplane 17 lbs Plans $1700Partial Kit $14000 Sopwith Pup80 WWI Biplane16-17 lbs Plans $1700Partial Kit $13000 WACO uPF-790 Biplane 23 lbsPlans $1700 Airplanes Landing Gear 2 wire formed $995 hipping Assembled reedy install $1995 hipping IWheel Pants models add $51 Cabanas $995 hipping Fokker Cabanes $1495 hipping Hardware Packageincludes famous Bebrens strut system$1195PP Ordering information orders shipped ups Par cal Post add $3 shipping plans $10 kits Make checks payable Jerry Behrens fastest service send Postal Money Order bank check Sorry no CODs accepted Send mail orders BEHRENS PLAN SERVICE 31-27 Healy Ave. Far Rockaway NY 11691 Phone 12121 337-6987 Allow 4-B weeks delivery FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos 45OmAH battery pack 600mAH 8 1200mAH extra Expandable Y 5 wIth large linear serves 12995 small rotary serves full-size aircraft model 26% full scale making same tad over V4-scale Span 78 length 60 projected weight 17 20 lb Q35 Quadra should pussycatand real barn-burner Q50 Construction similar Waco ways Spruce specified long erons case basic fuselage structure same Cabane struts replace cabin wing mount course Ive said before Darios plans val uable dont intend build particular plane involved can always pick up some useful techniques Two things caught eye case aileron counterbalance/linkage ar rangement other wing con struction jig Both designs use essentially same landing gear arrangement enough information plans make gear Dario also gives source ready-made gear fittings dont feel up bending brazing involved Sources semi-kits fiberglass parts also included heartily recommend both plans Available Dario Brisighella Sr 1032 E Manitowoc Oak Creek WI 53154 Well building season over nowso hope Ill see field Bob Beckman 8248 Holly Grove Ct Manassas VA 22110 ciple unlike /4 x A-in top bottom wooden spar vertical webbing However top bottom flanges Al-I-Spar hollow will recall allows joining spars titanium strip inserted hollow flanges first series four photos titanium strips shown extending wing roots Theyre notched new titanium wing joiner shown place Other photos show narrow space can get withsuch Sagitta wing joiner about slipped small box-like retainer after wing spar extensions fully inserted another shot what little space required solid wing joiner system final photo shows joined wing spar joiner C-shaped unit just behind white cross member fuse lage really neat installation no springs no rubberbands no hooks no robust blade boxes joiner will avail able time read Al-Tee Products through Ace RC Do-it-yourself department East ern Soaring Lines comes idea do-it-yourselfer Its Meyer Gutmans F3B flaperon linkage Thanks Coulter Watt ESL sketch drawing pretty much explains idea No special hardware required materials hobby-shop items Classified section dont usually run re RC Soaring/Prussquests column because un Continued page 53usual requests over years have swered unusual items usually just some aviation designs available top quality line sportswear designs direct printno heat transfer Gee Bee. P-40 Warhawks. Fokker D VII . P-38. AT-6. Christen Eagle. Pitts Special Citabria. P-47 Thunderbolt Steerman . Curtis Jenny. Corsair. will design Com memorative T-Shirt club special event Call write details Coaches Shirt $1205 Ladies Top$S50 ShortsS595 Lined Jacket$2 195 Tote Bag5795 Tire Cover$1495 Hat$595 Wide choice colors sizes Send S 100 new illustrated Brochure Refundable Ffrst Order T-Shirt--$695 Long Sleeve TS795 Basebsll$S95 Football$895 Sweatshirt$950 Hooded SweatS1495 Name Address CityStateZip DesignSize Color now accept MasterCard & Visa TO ORDER Send check money order add 10% postagelhandling MD res 5% tax OR CALL COLLECT after 4pm write Phase Art 17102 Earlham Ct. Upper Marlboro MD 20772 301 843-3050 GIANT R/ SCALE PLANS U7&uRTIss R-6 i 37 SPAN 12195 AERONCA C-3 3 8 SPAN LEAR FAN 13 1 72 SPAN S21 O0 $1930 VOOEL AVIATION RC DEPT BOX 54 RESEDA CA 91335 September 1983 157 The Best Custom Screen Sportswear Latest Design On-Off switch electric winch typically Controls solenoid switches heavy current battery winch motor What solenoid welds itself shut Only way kill motor severing battery cablesor pulling cable clamps off battery post runaway winch can vey dangerous Dan thinks winch should have Battery Disconnect Switches installed safety measure will handle 200 amp loads safely Dan has about column DA*C have found hit stumper month though Tony Fiocentino Pensacola FL looking 10-ft Hobie Hawk wing Yep few made back midseventies least set seen back 1976 SOAR Nats anyone has set sale contact Tony 105 South Navy Blvd Pensacola FL 32507 Oops department Last months Sno-Fli photo credits went Dave Corven Mich igan should have gone Warren Tiahrt gotta remember Warrens moustache Theres still time pport USA F3B team Good Lift Dan Pruss 131 E Penninglon Ln Plainfield IL 60544 RC Pylon Racing/Hager Continued tram page 57 tail mark out vertical horizontal lines cut out squares being careful cut through paint Remove ones get painted Im getting ahead myself After have paint scheme worked out like draw three-view pin wall Look few days putting base color doing color sanding still looks good use However will probably want change after staring few days spray equiment important surface preparation good spray gun proper working order wont save poorlyprepared surface will really lay down smooth coat paint properlyprepared wing fuselage use pro fessional painters touch-up gun eight-oz cup compressor Sears -horsepower model good quality water trap regulator trim paint ing Binks air brush equipped B tip Get out alcohol clean plane clean again Take old tooth brush get hinge lines Next blow off whole plane inside out highest pressure compressor will pump go over plane again good epoxycompatible tack rag base color should shot sprayed two stages light first tack coat 15 minutes later good wet coat cover entire plane color No trans parent spots should showing point trick painting good lightweight base color know stop Its easy keep loading paintbut pass spray gun weight yOure putting airplane So paint good light stop cannot see through color exposed fiberglass primer under Clean gun walk away plane day two Let dry out sun painting gloss hobby paint going use clear coat over ready trim layout now use flattening additive base color seems cover better less paint also dries bit faster high gloss Now paint has cured day two its time color-sand Using 500 grit wet paper soapy water sand whole airplane Use sanding block dust runs Watch edges high 0 Inc Migh performance model engine connecting rods Dealer inquIrIes invIted Richardson Precision Machining Inc 5070 Golden Dr. San Jose CA 96129t4oel 257-7050 points cheek cowl wheel pants can sand through color layer few strokes Now have whole plane sanded down smooth again get threeview down off wall still looks good start laying out airplane recom mend Scotch Fineline Masking Tape Its light green color flexible leaves clean line can get good auto paint store widths out whole trim scheme soft pencil before put tape plane Some people can eye ball trim job cant should able lay out entire trim scheme spacing between colors planned have remask color /x-in line between colors looks good provides contrast well making trim job go faster After have trim masking down take good-quality art eraser get pencil lines off area painted trim color cheap paper masking tape good quality paper butchers paper works well mask off base color Pick color going shoot first mask again other areas tape YOUR CoVapEaecE iS REASSuaii / - L4Vga4 158 Model Aviation storrner.1 1/I Scale @1/3 Scale See Dealer add Dollar direct order handliflq NYS RflidfltS add 7% Safl tax connecting rods made beat materials available designed give long service eliminate rod breakage modern high-Petior mance model engines used leading aircraft boat car racers hobbyists Rods available popular model engines Look RPM new innovative products proven performance records