Control Line: Scale

Control Line Scale Bill Boss NEW WAYS objectives column present ideas possible will help Control Line Scale modeler build fly better Scale model Over past few months have covered building ideas talked about scale documentation rules changes perform various operational functions February March 1984 columns presented electric ser vo system allowed number func tions performed through use electrified control lines modified ser vos electric servo system using three control lines allowed operation two servos addition fourth line permitted use third servo system works dependent use multiple lines going beyond three accustomed us ing becomes cumbersome month would like present electronic system can used standard three-line system insulat ing two lines done Clancy Arnold Lawrence IN two lines system built used Clancy called U/Tronics because combines basic U-Control principles certaln functions employed RC transmitters receivers Clancys system uses two insulated control lines nylon bellcrank elevator opera tion other functions such motor control retracting gear lights throttle control brakes operated via U/Tronics system Before talking about building Clancys system lets cover some principles operation U/Tronics system describe operation typical digital RC system simple terms OVOC AI 1Ik 52 J27 82-SR Kt R4IIJ3jTijjj 211 85-18 RU I 18 2ZIS rCE- 4Thf -4 314C3047CI 228 811-108 z13C4-IIf RI -108 5012 S 0118 14108 J 62 81522 71058OICf 8173008 88 C7-It would probably say following Movement control sticks RC transmitter varies DC voltage input transmitters encoder circuit enS 1815108 OP LINE LINE CONNECT ALLh POINTS TOGETHER ENCODER SCHEMATIC 48 VOC ALL SERVOS ONE CONTROL LINE TO EACH O GROUND TO ALL 6w,, 2 coder generates series pulses spacing directly proportional movement particular control Continued page 167 16 ci C zIS -4 314 0 0 4 z m 812 0 -ci 6OIII z T0 5 9 SLACK -J SI CI-47uf CS 338f RI 82-1K R3-IIK N4 3I~ RB 5dK RB i~5IK 87 TfSsK Hill DCI 4 NICADGI C4IlIt L LINE CONNECT ALL POINTS TOGETHER DECODER SCHEMATIC RC columni However electronics Ciancy Arnolds UIMstic system Identical used modern RC equipment schematics look large theyre merely done way show wiring details unit can mounted PC board about 2-In square Theres iota info column Theres enough spare capacity several control functions October 1984 79 Ciancy Arnold Lawrence IN flew fine Confederate Air Porce P38 lot 1983in cluding Nets PAl team trials Wingspan laSS power two Supertigre 355 However unusual feature model something cant seeits dIgital proportional two-line control system Individual engine throttles flaps retracting gear landing lights brakes addition elevator control via standard belicrank photo below shows Ciancys homemade control handle contains switches poten tiometers 9-volt battery small PC board wIth encoder %-in-thlck nylon cord provides good hand grip Its end-loops hook pull-test scale ec 238 points Second place Ken Ciroves Fike Dream E best flight 147 ec scoring 231 points Bob Bienensteins Fike E scored 177 points best flight f 108 sec AMA Scale Groves Fike Dream E won two maximum flights 96 tatic score McGillivrays 5E5 flew very well scoring two maximum flights Lotal score 185 Third place went Doc Martins Cessna AW score f 1695 points [n retrospect Third US Indoor Championships ran very smoothly because excellent work Con est Directors Tony Italiano Hardy Brodersen Charlie Sotich Gordon Wisniewski thanks round spplause Thanks also go Richard Aelody Doig securing contest site nd Bill Paul Shailor help Ln site preparation final tally showed Lhat 55 contestants entered weather excellent too hot [y thunderstorm interrupted flying Better still years meet proved Lhe good times comradery US Indoor Championships tied West Baden good effect because fliers spectators attend look forward next years US Indoor Cham pionships wherever may CL RacinglBallard Continued page 82 fuselage section Midwest area find Glen Lee titanium landing gear 1 A-inch wheel make sturdy landing gear some rough areas must occasionally fly Slow Rat engine shut-off swingweight assembly Several competitors past have asked simple unit would utilize swing-weight car buretor 05 36 engine well fuel shutoff needle valve assembly have photographed shows detail fairly accurately brass steel tube soldered inlet reardraft carburetor eliminate bends tub ing metal tube used primer exhaust standard inlet mounted side fuel tubing run under fuel shutoff shutoff body itself used mount arm swing-weight carburetor also hold needle valve assembly securely mounted rear backplate cover engine keeps unit compact vibration-free have found trial error two-man pit crew Slow Rat man datory man fills tank starts engine other man holds aircraft applies battery method just two jobs man eliminates foul-ups pits keeps ground time minimum Fast-fill damage during pit stops Lately have seen several competitors end up extremely sour engine runs forced make shutoff during Racing competi tion culprit rubber fast-fill attached tank type used majority Racing aircraft problem arises extremely large neck fuel-filler bulbs jammed soft rubber quick-fill actually tear puncture small hole fragile rubber holes very difficult observe very possible have poor performance uneven needle setting result small pinhole have watched considerable terest several premier pitmen will slide neck filler bulb quick-fill orifice angle straight down top Obvious ly engine shut off quickfill swelled position pressure still tank bringing filler pipe straight down very easy tear rubber ballooned swelled areas going angle pressure released quickly chance damage rubber minimized addition find fast-fills become embrittled very quickly will hold satisfactory seal under hightank-pressure conditions Under race con ditions obviously certain amount vibration aircraft evident checking-out rub ber fast-fill home another common occurrence involves large-diameter metal stems usually mounted racing tanks fast-fill attached small hairline cracks develop solder joint between stem tank generally make very generous radius out solder point continual engine vibration jolts caused inserting filler tube fast-fill rough landings will crack joint allow tank-pres sure leaks tank pressureleaks using pressuretank will certainly get er ratic engine run As always solicit comments photos appreciated John C Ballard 10102 Kimblewick Dr Louisville KY 40223 CL ScalelBoss Continued page 79 stick pulses sent trans mitters RF section modulate signal being broadcast signal received receiver reverse process takes place signal passes receiver RF section decoder pulse stream broken down directed particular servos operation U/Tronics system simply eliminates transmitter receiver RF sections replaced pair insulated wires between control handle REBEL a/c 061 Isom Road San Antonio IX 78216 512 341-6712 FUTABA 7FGK FM W/4 S-12820995 7FGK W/4 S-2818495 6F6W/4 52815495 4FGW/4 S-2814395 4LW/3 5-2810495 S-28 SERVO1895 PLANES ireal Planes T-606195 Great Planes Cap2I406195 Goldberg Sr Falcon 5095 Goldberg Eagle 63 395 Craft Air Drifter II 1795 Crail Air Piece OCake 1795 EPOXY GLUE Descon 30 Minute 9 Ounce 595 Iescnn 5 Minute 9 Ounce 595 Hobbypuxy 118 Ounce 359 Huhbposy IV 8 Ounce 559 Rebel R/C 30 MinnIe 9 Ounce 575 TOP FLIGHT Monokote Opaque 3 Rolls1695 Monukote Trans 3 Rolls1695 Monokote Met. 3 Rolls2095 Heat un1995 Heal Iron1395 CV ANOACRY LATE Hot Stuff HS-I e149 Hut Staff HST-I e149 Hut Stafi HS4 2 Ounce499 Hot Stuff HST4 2 Ounce499 Hot Shot245 Jet Ounce159 Super Jet Ounce159 Jet 2 Ounce915 Super Jet 2 Ounce 25 PIEASE NOTE Prices subject change mantifacttirers prices change items subject asaitabitit time sate Prices erred until nest Model Asiatitn Issuc Sh,ss room prices mu stightti higher isit ole show room ss hi/c San Antonio 104 discutint price list reftinded first order Shipping & Handling Prepaid orders $318 (II Credit Cord orders $595 Oscrseas orders add estimated shipping 25% dcposit reqitired nest time (II 55%satcs rcqiircd Icsas residcnts lersonal checks dclas shipping 5 doss October1984 167 IN STOCK rues tvitvicuu ir nurmw. 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Add S250 poatage Send Sank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley Vtew Dr gany NY 14706 mymEET PIXr BREAK THE 2-METER PERFORMANCE BARRIER LIGHTWEIGHTSOLID CORE CONSTRUCTIONEPPLER 214 AIRFOIL AILERONS80 OTGREE FLAPS elevator compensatorWINOSONG STYLE FUSELAGECLEAN QUIET SNOOTHTRAC KING AND EFFICIENT Pixy peer multi-task thermal competition pure myna mite fly v slope thermal aerobatic displays will make heart stop 1 hr VHS VIDEO TAPE showing OUR PLANES IN ACTION CONTROL TEMS LINKAGES APPLICATION FIBERGLASS FIN/TURTLE-DECK ano H WING BUILDING SEQUENCE Send $25 $20 deposit/$5 ship/hanaling 2 stamps complete catalog f mar multichannel ghders giving specifications - armance control configurations construction kit/parts price list induong $19995NEW Camano 100 $15995 BR ND NEW Pisy $14995 OBSON DESIGNS SW Cainano Drive Camano Island WA 98292 plane system no RF signal used transmitted series en coded electrical pulses sent up lines model article will detailing step-by-step construction system units rather will give overview put together operates will have assume anyone tempting project either familiar electronic component wiring use printed circuit boards knows someone does can help accompanying schematics show wiring encoder decoder units four types input circuitry used Clancy P-38 shown accompa nying photo first input th en coder Pin-l represented R-l 5K pot used fully-proportional control desired could models throttle control operating cooler doors etc S-2 SPDT switch arrange ment Input 2 used desire set fixed position item after its operation such flaps 5-2 position shown schematic flaps would up adjustment R-2 5K pot used define posi tion 5-2 operated its other position flaps down position determined adjusting R-3 5K pot third input Pin 3 controlled set fixed resistors S-3 singlepole push-button switch used Clancy operating brakes case operation 5-3 used applying brakes open position allows servo return fixed position leases brakes final fourth input shown 5-4 single-pole three-position rotary-type switch used combination fixed resistors R-7 R-9 1K pot R-8 operating landing gear landing lights schematic shows S-4 posi tion would have landing gear fully retracted center position allows landing gear operate fulldown position point retract servo has traveled something less its full travel point servo travel controlled R-l pot adjustment 5-4 operated its third position left schematic retract servo allowed move its maximum travel point used trip switch turns planes landing lights inputs shown examples types can used en coder can design own inputs long voltage-divider circuit least 5000 ohms between Pin 15 regu lated lts Pin 8 return side battery provides volts input pins number through seven encoder parts required construc tion system generally available electronic parts supply shops fixed resistors /4-watt size pots R-l 2 3 8 miniature size have adjusting shafts R-l 14 can PC printed circuit type capacitors ceramic type need have voltage ratings much higher 12 volts decide build system will need printed circuit board about four-inch square two 16-pin chip sockets some light hookup wire switches activate encoder inputs functions wish perform model case Clancys system en coder parts mounted piece PC board measuring 1 x 15 inches mounted inside control handle along pot controls switches nine-volt transistor battery used powering encoder will note accompanying photo Clancys homemade control handle has two lines because chose control throt tles model electronically rather use normal three-line bellcrank system Using two lines permitted him use heavy nylon bellcrank elevator control same time provide insulation control lines model end control lines handle end insulated another being attached insulating material such piece heavy nylon fiberglass fastened rear handle Control lines used Clancy made Berkley Co 120-lb-test nylon-covered salt water leader called Steelon 027-in thick constructing decoder size PC board critical will mounted somewhere model will have provide appropriate space servos 48 volt 55OmAh Ni-Cd power supply S6me last thoughts After units built powered up couple minor adjustments made Start measuring voltage encoder pin 13 Adjust pot R-14 until voltage pin 12 /2 voltage mesured pin 13 Next adjust pot R-l Ito center servos R-14 may changed slightly R-l readjusted center servos less servo travel desired Please note positive-pulse servos should used system Clancy has indicated will pro vide help can anyone builds system encounters prob lems requests send SASE self addressed stamped envelope questions Send letters Clancy Arnold 5434 Purpura Dr Lawrence IN 46236 Good Luck system Please send items CL Scale Bill Boss 77-06 269th St New Hyde Park NY 11040 CL SpeedlHem psi Continued page 80 stepped damn plane said Id turn ya over knee tell parents Well gave model cou ple dirty looks said Yeah would almost worth End story Gene dont know what percent kids like shock quite some time Anyway kind happening indication youngsters attitudes today no wonder sport serious danger also feel Control Line should publicized pro motioncarried out Another problem needs dealt RC can young people get information CL magazines print 3/4 RC / CL may much Lets face Control Line becoming spe cialized sport what 20-25 168 Model Aviation