NO OCR TEXT NO OCR TEXT layout work continued keep wingspan small possible still have sufficient wing area reasonable wing loading fuselage centerlines set 16 inches would let usual 18-inch props overlap two inches Seemed reasonable Ive settled six-inch-wide fuselages about narrow practical using gas engines center wing section would constant chord tapered tip panels wanted easy build one-piece wing checked minivan figured would accommodate 104-inch wing too much trouble two fuselages removable center stabilizer section wouldnt problem longer fuselage would about 70 inches overall second fuselage would have four-inch-shorter nose Overall proportions airfoil moments about typical sportlaerobatic aircraft didnt think design represented too much risk usual preferred construction foam core wing foam core fuselage top blocks foam core tail surfaces sheet aluminum landing gear cut two would easy along two tailwheel assemblies Suitable fiberglass cowls wheel pants plastic canopy available Fiberglass Specialties radio gear installation would aileron servo outer wing panel fuselage would have throttle servo elevator servo rudder servo linked extended Y harnesses receiver fuselage would steerable tail wheel fuselage linked its rudder equal elevator loads planned use Y pushrod elevator servo drive two elevator sections fuselage removable center stab section would have its elevator two pieces worked out fine Construction prototype went fairly quickly after building two fuselages tail sections thinking could have two complete aircraft time liked appearance completed Twin Cut few doubts about its flying qualities Comments club members saw airplane before finished encouraging some felt Id lose few fingers starting engines wouldnt able test fly feel engine starting particularly dangerous extreme care called aircraft prime both engines start up rear engine first forward Cheetah 42 engines easy starting starting forward engine its prop positioned vertically against compression fingers definitely within arc other prop also ahead other prop An electric starter would course make procedure safer model completed time January test flight very good planning lucked out some unusually warm breezy weather test flights went December 1998 129 Foam core tail-surface parts cut 3/ thick foam sheets Wing center section full-depth plywood spar glued place Partial plywood ribs also glued plywood wing mounting tongues place Fuselage assemblies foam cores placed top prior sheeting off smoothly quickly apparent Twin Cut flew smooth steady plenty power two new Cheetahs rolls loops responded quickly positively two-fuselage configuration didnt seem hinder aerobatic performance During first two flights put airplane through about everything could think ofloops rolls snaps spins stall turns low inverted passes etc Now Im sure doing competition-class maneuvers days airplane looked good did everything wanted very stable groovy easy fly equivalent single-engine aircraft Twin Cut has twin-engine sound just what Id hoped twin isnt everybody twinengined aircraft exciting funworth bigger investment CONSTRUCTION Theres quite bit foam cutting done wing cores three sections top blocks two fuselages foam sheets tail surfaces receive quite few requests sources foam core cutting number custom cutters advertising model magazines encourage anyone expects scratch-building own foam cutting think its quick easy way build Patterns templates used cutting shown plans templates can made thin plywood Wing There three wing sections deal some work needed center section core before sheeting can applied full depth /s plywood spar center section strengthen reinforce two dihedral joints plywood piece epoxied between front rear parts core two outer sections will epoxied center section after sheeted two slots cut leading edge center section /s plywood partial ribs used support ood wing mounting tongues Epoxy plywood partial ribs place cut slots mounting tongues will glued place after wing sheeting leading edges have added core two outer sections cut slots root ends plywood spar sand ends accommodate dihedral angle cores joined its easier sand angle before sheeting tips should cut off angle before sheeting can easily trimmed later add tip sheeting Before sheeting holes through cores aileron servo leads servo connection leads between two fuselages must put make tunnels heat end piece push heated end through foam core tunnel through wing center section should enlarged accept servo leads going between fuselages wing panels sheeted medium /32 balsa edge-glued necessary width prefer aliphatic-resin type woodworking glues joining think easier sand smooth joint sand inside surface sheeting rough sandpaper speed up work use fine sandpaper finish off outer surface strongly recommend Dave Browns Southern Sorghum contact cement apply sheeting cores cores sheeted top bottom trim off leading edge overhang block-sand square Add oversized balsa leading edge strip use five-minute epoxy speed up work plane sand shape Trim sand sheeting match cut off tip angle add tip sheeting round edges slightly ailerons cut sheeting wing panels trimmed down allow balsa edging glued place sanded shape Hinge ailerons along centerline using large sturdy freely moving hinges type prefer Keep gap between aileron wing tight possible still permitting full movement aileron Dont glue hinges place now will done after covering has applied Recesses cut bottom wing surface aileron servo mounting Epoxy plywood mounting pieces position wing suit servos having servos protrude wing surface just far enough hookup aileron pushrods hole needed through foam core root aileron servo location servo 130 Model Aviation lage top pieces cut shape hot wire over templates block ends Type RC Sport Wingspan 104 inches Engines Cheetah 42s Functions Throttle elevator rudder ailerons Flying Weight 27 pounds Construction Balsa foam Covering Film WIry FIBERGLASS CLOTH FIBERGLASS COWLS WHEEL PANTS FIBERGLASS SPECIAL TIES 51200 MILANO DR SOITE I/O 7 3/0 PLYWOOG I/B PLYWOOD I/B PLYWOOD I/B BALSA OVER FOAM CORE DD I/B BALSA BOLKNEAOS -I/O BALSA I I I/O BALSAVERTICAL F/N COCKPITRIGHT FOSEL AGEEXTENDS THROOGII -LI---I//B PLY DOOBLER N,8 BALSA I/B PLYI/O PLYWOOD B ID WHEEL S I/A PLYWOOD DRILL AND TAP 1/4- 20 3/10 TEMPERED AL GM/NO/A /04 WINGSPAN TO LENGTH 0I2 5 4 5 $P BH /0 II ID TWIN cur SPORT/AEROBATIE AIRCRAFT DESIGNED AND DRAWN BY 0/OK SARPOLOS CD 0 CD 2 CCD 0 CO -L -Il N CD -U n 0 CD CD -o 0 CD Co 1 r m FOAM CORE WINO TEMPLATES WRAP DINEDRAL JOINTS WTN INSTALL AILERON SERVOS INBOTrOM SURFACE DOLE TNROUON FOAM CORE _______FOR ASERON EXTENSION CABLE CROSS SECTION ___ -1-___________________ IDRILL AND TAP FOR ID-Sf NYLON BOLTS0 __-N 1/10 PLYWOOD________ f TOP AND BOTTOM 5/0 1/2________ BALSA -_____I FRAMINDj____o______- -o_____ I/B PLYWOOD WINO CENTER/DIOCORAL JOINTS REINFORCEMENT ____ 7 / ii I I liii III FOAM CORE FUSEL ACE TOP BLOCKS TEMPLATES F-II I__ NS/B TRICK FOAM CORED CA 1% 0 0 0 LrWOOO 1N0 MOUNrS I/B PLYWOOD 7 ,B PlYWOOD SPAR 1ii ___F- _ I- 1-z --ii-I - -- 4TWIN CUT SHEETS OFF AL5A DICK SARPOLUS.. 3/ALSAFOAM 8r\Jo 1RANG ACEJJ JU5T SOME Mo 8ARFOLUS MADNE$ ThE /ING A SHEETED FOAMAND Tf4 FU5ELAbEb AW TURTLE C4K TP TAIL5UFAc AKE AL$A 5hEYuie .SLY3SRFAT U5LAGS AE IFFENT 44 LENGTM5 4 - BM5A 32 SIAEET ALL fAIL SURFACE5 extension cable melt tunnel again use heated end piece l rod plywood wing mounting tongues used wing leading edge position retain fuselages wing Done way contact area fuselage bulkhead retaining wing mount can trimmed shimmed necessary get correct wing-to-fuselage fit adding outer wing panels center section used 1 inches dihedral under wingtip Epoxy wing panels together sliding tip panels over dihedral brace protruding center panel wrap dihedral joints heavy fiberglass cloth epoxy plenty strength used 12-inch-wide length cloth around wing joint probably overkill Ive never wing break type construction also used six-inch-wide strip cloth around leading edge center section between two fuselages insurance brush coat slow-drying epoxy position fiberglass cloth brush epoxy sure cloth saturated get excess epoxy off smooth finish save weight squeegee off epoxy piece cardboard leaving enough cloth soaked strength smooth level Fuselages fuselages basically same except shorter nose section left fuselage Select firm-to-hard balsa sides edge-gluing splicing necessary Glue A6 plywood doublers plywood landing gear mount doublers balsa wing saddle pieces stab saddle doublers balsa rear lower edge strips fuselage sides used 3/ plywood firewalls laminating lywood fuselage side flat workbench add firewall next four bulkheads installing perpendicular side Glue second side bulkheads sides parallel firewall wing trailing-edge position Add triangle stock heavy fiberglass cloth behind firewall reinforce its joint sides also put several small screws firewall through fuselage sides 4 CycleED8ON.~a UCMIr UOiUmriiuIpUL M4P $1255M40FC sisss FitsFITS SAITO40 46SAITO OSUAX406OS0OSAIAX EtYA40 60ENYA HP140 60WESRA OTH5R4G 5080OTHERS NO ONIWNO TA Send & SPARE PARTS AVA3E.. --- Makp Check Payehie 1OI DSCOUNT WMI~RS Edson Entermisa 1 Add $4 Gd SiilIng & HwmdtlngOGAWW *Ohbm cmu m0bI~ Balsa Building Board smooth surface is3 SiZes excellent pining parts available place gluing together Pieces cut cross grain end wood gram makes up surface allows multiple cuts surface crumbling Board slightly flexible Price includes S & H MI residents add 6% sales tax will conform table topSorry no orders outside continental U S #24 36so 1#48 48xiSx LYMCODGVF41AtProdigycom PO Box 178Check money Milan MI 45160order onty December 1998 135 Aveox SweeDs Electric NATS F7 LMR motor took top 8 places Class LMR Sa p ane Congratulations Day d E Class B Aeoxtook 6 top 7 places including first p lace tiel Both Only 3 onints pert ect George Joy won Class ff using F7LMR motor 12 cells Call write fax e-mail us FREE catalog Shown new Fl 0 Competition model new lightened version weighs 21 5g wires capable nearly 1 horsepower used 10 cell F5B competition also worlds powerful 7 cell motorl used new Hybridrive L60 controller can get over 700 watts 96 ounce package Aveox Inc 31324 Via Colinas #103 Westake Village CA 91362 Phone 81859 78915 Iax 8185970817 httpIAwiwaveoxcom info@aveoxcom Aveox High Performance Brushess DC Motors D & J ELECTRONICS Marigold St NW Hartville OH 44632 1236330-877-1445 Service & Repairs Most Radio Control Systems Utilizing Calibrated Test Equipment & Spectrum Analyzers Endorsd AMA RCMA Sticker Station #105 Futaba Airtronics JR Ace HiTec Tower Cirrus World Engines & WE USE GENUINE FACTORY REPLACEMENT PARTS Complete 1991 Narrow Banding & Upgrades RCD / HITEC R/C DEALER FCC Licensed Speed Control Repairs Quality Service Fast Turn Around Shipping & Insurance ExtraUPSU S MailCODs Visit home page http//wwwdnlelectronicscom Email david@dntelectronicscom iayne@dnjelectronics AMA #256t23ARRLWBSYSQ FOUR SCALE CATALOGS SPPS 160 Supomcaln Construdion Plais$500 SPPS 12oocO Docunentaeon Ploton aVs$500 ASPsttidion Plain$500 ASPSmraftDraMngs3Vs $5 00 WACO YMF-5 1/4 Scale 90 Plans $3500 Visa/MO Jim Pepinos SCALE PLANS & PHOTO SERVICE 3209 Madison Ave Greonuboro NC 27403 PHONE/FA 910 292-5239 LOOK FOR YOUR LOCAL NRHSA HOBBY SHOP ON SITE EXPERT ADVICE AND INFORMATION QUALITY MODELING PRODUCTS WERE THERE WHEN YOU NEED US WHERE ELSE CAN YOU GET THAT GLOW PLUG ON SATURDAY MORNING AMA FAX APPLICATIONS AVAILABLE LOCAL CLUB NEWS AND HAPPENINGS PART OF NATIONWIDE ORGANIZATION WORKING FOR THE BETTERMENT OF THE HOBBY INDUSTRY HAVE YOU EVER RACED ON MAIL ORDER TRACK REMEMBER WHO GOT YOU STARTED IN RIC F RCJIaZAPprnt FLORIDA JETS 001 Feb 25th thin Feb 20th Flagler County Airport Bunnell Florida REGISTRATION FORM I Name ________________________________ AMA# _________________ I Address I I I TeIRadio Freqs ____________________ D $4000 registers aircraft On-site registration $6000 II Payable FLORIDA JEll Frank Tiano Enterprises 15300 Estancia Lane Wellington FL 33414 Tel 1-561-795-6600 IMoney orders checks cash accepted Sorry no creditcards Map hotel list & itinerary will mailed upon receipt ofI Lregistration fundsMA Add ood wing bolt plate plywood landing gear mount pull tail end together installing rear bulkheads sure fuselage sides taper straight line rear straight-cut foam rear top blocks will fit correctly Trial-fit rear top block install bulkheads can trimmed moved block fits well foam block can also sanded its edges good fit before sheeted Check see sheeted will line up flush lower fuselage assembly Sheet fuselage top foam blocks done wing cores Trim sheeting glue top blocks place fuselages used high rear top block plastic canopy right fuselage low top block left fuselage asymmetrical appearance plywood landing gear mount epoxied fuselage can add some hardwood blocks inside holes will drilled tapped nylon gear retaining bolts provide wood threaded bolt holes also use aluminum right angle bracket side gear mount bolting gear mount through fuselage sides airplane size weight believe epoxy alone wont hold gear mount place during rough landing want nylon gear retaining bolts break appropriatenot pull out section fuselage mounted engines 3/4 thick plywood spacer ring provide clearance stock Cheetah mufflers use 10-32 Allen bolts through engine mount blind nuts rear side firewall engine can removed front aircraft having get inside fuselage After engine mounting done holes drilled through firewall fuel tubing throttle linkage ignition wiring plywood forward bottom piece can glued fuselage lower front corners rounded fiberglass cowls trimmed fit leave rear fuselage bottom planking off until tail surfaces added can cut holes rear bulkheads elevator rudder pushrods Tail Surfaces tail surfaces built 3/ thick cut sheets foam 3/ 1/2 balsa edging reinforcing added before sheeting cores 3A2 balsa just wing cores horizontal stab made three pieces center section can easily installed removed 6 plywood tabs top bottom fixed stab sections accept removable center section two 10-32 nylon bolts side retain stab center Hardwood blocks installed ends center section nylon bolts will go elevators made four sections two elevators side driven elevator servo 136 Model Aviation r%~ HOBBY STORES ASSOCLN11ON NC www hobbystoresorg 1 Weve got number 11 sizes 11 great colors pressure sensitive & water transfer major decals W MA 01028 TEL 413 525 4110 FAX 413 525 NORTHEAST SCREEN SRAPRII2 PO BOX 304 EAST fuselage Y pushrod Cut slots drill holes along center lines surfaces whatever hinge type youre using notch control surfaces needed permit close fit surfaces main structure allowing proper movement use ood pads control horn mounting recessing epoxying plywood elevators rudders horns mounted self- tapping screws fuselage has leaf spring tailwheel assembly mounted /s plywood fuselage bottom linked coil springs rudder rudder servo fuselage throttle servo fuselage Servo extension cables through wing center section connect two elevator servos two rudder servos two throttle servos via y-harnesses receiver left fuselage fit fuselages wing next adjusting fit wing mounting tongues necessary through fuselage bulkhead drilling tapping wing mount plates two -20 nylon bolts hold fuselage place Adjust fit two fuselages horizontal stab will parallel wing center section wing mounted both fuselages add horizontal stab bolted up piece aligning wing Glue both outer stab sections securely both fuselages done way stab center section will easily removable will go precisely place vertical fins added perpendicular stabilizer use ood servo mounts fuselages fiberglass tube pushrods elevators rudders along 4-40 threaded rods devises Y harnesses extension cables used needed radio hookup color-coded servo leads extensions dots paint make hookup easy assembling aircraft 1200 mAh battery pack used wrapped well foam fiberglass cowl cut clear cylinder carburetor air intake muffler right behind cylinder exits straight down toward ground stock muffler comes Cheetah 42 engine works quite well really need lower noise level Id suggest using higher pitch prop running engine slower interesting ignition system comes Cheetah 42 Jump Start made C&H Electronics electronic module carried aircraft battery pack Jump Start used starting engine external battery pack plugged jack mounted side fuselage switch put start position ignition module retards spark timing easy safe starting engine running switch flipped run position battery pack unplugged engine continues run its own magneto ever NEW HIGH THRUST NOZZLE IMPROVED PERFORMANCE EST GINE -Boost Fuel Pellets ire Power er Runs IAL INTRODUCTORY STARTER KIT add Vt Sterling Mode 1295 H Street Penrose CO 8124 TA LWA 2 LW N NS December 1998 139 Available Favorite Model & Hobby Store ignition setup engines start quite easily never kick back starting Four-inch spinners required use CB units fiberglass wheel pants mounted axles landing gear Sigs nylon brackets conventional sheet aluminum landing gear could cut half half mounted fuselages opportunity try molded epoxy composite landing gear Twin Cut gear made fellow modeler Bill Koster Lake Havasu City AZ made conventional gear cut half use Twin Cut holding gear leg place four lh20 nylon bolts covered model usual iron-on plastic film finish trimmed aircraft name AMA number computer-cut vinyl Vinylwrite Custom Lettering fiberglass cowl wheel pants painted spray cans quick easy Flying Before first flight took time starting adjusting engine separately adjusted carburetor setting engine reliable idle adjusted top end slightly rich engines brand new After considerable experience twin- engined aircraft set up engine tach about same speedand dont touch either engine after both running theyre perfect sync Its much important engine running well reliably dont have exactly same rpm two Cheetah 42s turning 18 x 10 prop figured would plenty power slightly rich setting 27-pound aircraft twin-engine sound made worthwhile like different aircraft perform well practical Twin Cut does job Sarpolus 32 Alameda Ct Shrewsbury NJ 07702 L I41 I [] n Antiques Military Civilian Helicopters Sailplanes2 have lb wodds largest aircraft documentation collection 7000 different full color photo studies 1903-1997 35000 3-view line drawings 998 Catalog/Guide 200 pages OnIyuca ooo nods/Mexico $100 Oversees $1500 Bob Banka s Scale Model Research 114 Yukon Avenue a Mesa CA 92626 714 979-8058 http //www imt net/ims/scoie html 1120 Wrigley Way Milpitas California 95035 Voice/Fax 408 946-4751 408 WINGS-5l d LOOK no further fuily molded sailplane needs RnR offer selection high performance sailpianes will address specific requirements F3BThermal Duration Slope Cross Country Mark Alien designed World Championship F3B EAGLE now being produced RnR its new lower price RnR sailplane enjoys design construction enhancements 1997 RnRs composite molded technology provides unique blend strength weight optimization Noticeable results found through increased durability torsional stability stiffness incorporated wing fuselage tail section also offer selection parts joiner systems scratch builders out catch latest visuals specifications competitive pricing RnRs sailpianes contact RnR RnR skys limit. December 1998 141 FAI MODEL SUPPLY EXPANDED CATALOG IPOLYSPAN AIRSPAN LITESPAN STARSPAN MYLAR TEXAS TIMERS FAITANIIRUBBER 1A 3/i6 /8 3/32111/1611 042 THICK 1 lb box $1 8 UPS delivered US 10 lb boX $135 UPS delivered Made USA PA res add 6% saies tax KSB fuei timers 1900 eiectric ighters $600 Front ends winders stooges Books Czech P30 props Suck Lube CROCKETT hooks huge bunch great FF kitsZONA SAWS CatalogFAI Model Supply $200 fiR P 0 Box 366 Sayre PA 18840-0366 PhonelFax 717-882-9873 HOT NEW VIDEOS FROM INCAB-RCTM IF YOURE INTO R/C AERIAL PHOTOGRAPHY OR VIDEOGRAPHY YOU MUST CHECK OUT THESE HOT NEW HIGH-QUALITY VIDEOS THE EXCELLENT INSTRUCTIONAL GUIDES SHOW YOU HOW TO DO THE VARIOUS INSTALLATIONS PROPERLY AND THEYRE ENTERTAINING AND ACTION-PACKED TOO INCAB-RC PHOTOGRAPHY INCAB-RC VIDEOGRAPHY $2495 S&H INCAB-RC VIDEOLINK $2995 S&H PAL AND C-CAM ADD $500 PER TAPE RC PROVU flON INC I7J~JXCELLENCE IN INFORMATION AND ENTERTAINMENT TM ORDERS 541 -683-5445 FAX & INFO 541-689-5667 DAVE UPTON PRODUCTIONS 4487 KNOOP AVE EUGENE OREGON 97402 THERES GREAT SAMPLES ON OUR WEBSITE httpllwwwINCAB-RCcom