CONTROL LINE AEROBATICS SOME YEARS AGO rare opportunity spend several days Dr RV Jones Winston Churchills Senior Technical Advisor during World War II early 1950s chaired committee examined technology projected what weapons systems should developed England maintain proper defense posture taiked him 30 years since panel Faulldands war over points really wanted probe methodology group used explore technologies options make conclusions looked environment elements could change would remain relatively stable baseline looked what technologies likely available out years So what does have control line Aerobatics ask Well things changing what has relatively static event years Pattern has stable since 1958 although possibility adding inverted triangle exists Maximum line length 70 feet engine limit 10cc likely changed having laid out much has evolved over years would like touch would like look bit future see event may go some new construction techniques evolving proven technologies know balsa-skinned foam-core flying surfaces have improved event allowing fliers access better-flying models Bob Hunt has made improvements foam technology over years has recenfly come up idea already very successful individual applications come Bob calls new technology Lost Foam process end result built-up balsa wing foamhence name Lost Foam basic process generating foam core followed thats new process departs idea use core generate accurate rib sections rib positions marked core core sliced outlines copied doesnt take much thought realize can generate geodetic sections easily fact exactly what done After planform outline plotted ribs cut next neat idea comes saddles used assemble wing providing dead-true wing exceptionally rigid very lighttypically 4-ounce basic wing compared sheet/foam 71/2 8/2 ounces same stage big-time weight savings lot other plusses Accuracy light weight two goals using thin sheet wood base coverings accurate structure Molding exterior components has used years extensively benefits construction question havent people used answer obvious takes mold thats work plans have drawn mold work done etc Its just greater investment time given repeated use component its investment could provide good return because time use mold amortize time Weve talked about couple construction techniques believe will see bigger play future competition planes Obviously idea saving weight attractive just dont get much good wood anymore effective use thinner wood highly desirable attendant feature accuracy extremely important accuracy achieved result efficient design assembly much better again has up-front work puts off people because commitment necessary Lets look far Significant improvements coming along construction techniques balsa both evolutionary revolutionary driven need reduce weight increasing rigidity increasing accuracy can still build using oldfashioned techniques once try some newer technologies probably won t want Next month Im going look some composite materials being used construction improve performance As Ive said times before May1994 121 Bill Richs latest Intrepid SV-12 XL Basic SV-12 stretched Rick Ashford flew Steve Buso design Superkestrel 1993 slightly span tail moment arm 0S 46 VF pipe Nats ST 60 Randy Smith Flies well 80 ounces Dale Derek Barry Tom Dixon Derek Barry working 1994 model Charisma design Derek extremely Randy Smith Vectra OS 46 VF successful national level carbon pipe Caifedeinre AirFarce IMAA Chapter 94 Pmmt GIANT SCALE FLY-IN MAY 12131415 1994 HARTNESS FIELD GREENVILLE SC Mike Gregory-CD W803-232-6424 H803-244-8660 Kirby McKinney Spokesman W 803-242-5567 H 234-7743 Reuben Byrd Spokesman W 803-242-5567 1-1 292-9125 Pat Hartness Host 803-297-1522 Current IMAA AMA required gate SORRY channel 20 cannot fly N2 TAKE 1-85 TO EXIT 34 THEN FOLLOW THE SIGNS column just about time Stunt community figures out particular engine product works extremely well goes out production Most recently piped OS 4OVF went out production word has OS 46VF out production although still generally available know excellent ST 46s 60s still demand will years come Fortunately theres news may overcome some shortfalls considerable amount technology has become available former Soviet Unionthe changes have caused quest hard foreign currency latest situation may benefit community being worked Tom Dixon has just finished negotiating import loopscavenged 10cc 60 ci true Stunt engine cylinder/piston ABC ring projected weight muffler 12 ounces delivered price will $200 range Tom requests interested parties contact him get order list money will due engines available delivery spring 1994 engines being built world-class FM Team Race competitors know what doing fill related need Tom having ABC and/or AAC cylinder/piston made ST 51 Merco 61 possibly ST 60 will made same high standards 10cc engines should also available spring Tom also working several other new engines suitable Stunt work MVVS 40 rear side exhaust will retimed pipe non-pipe work engines similar OS FSR series MVVS 52 Mold 51 also available $180 two engines require no rework Stunt run well right out box Thunderbird 670 T-Bird resized ST 51 similar engines features include wood carbon fiber push rods adjustable leadouts both aluminum gear fuselage mounting wing wire landing gear introductory price $100 plus shipping Box Car Chief 42-inch span highwing Old-Time design Ricks MF6 reintroduced Mike Keville exceptionally good OTS plane 29 40 price $45 information contact Tom Dixon PO Box 671166 Marietta GA 30066 heart good Stunt model sound control system Ive using some components purchased Dan Winship cannot recommend highly enough Dan constructed horns 1 3Aa wire brass tube bearings tAs steel uprights specifications center joint brazed picture perfect Pushrod bushings users option Ive used /s brass tubing before have since turned some phosphor bronze caps Ive soldered place Dan also has bellcranks available complete system Contact Dan Winship Models 5971 Oak Hill East Dr Plainfield IN 46168 Tel 317 839-8316 time read its going time finishing mode theres new product should make job easier No first-class Stunter complete some ink work dress up detail finish know takes bunch time apply ink work Access panels always give trouble because seem take time get right Im prone make mistakes other day purchased sheet dry transfers Dry-Set Model Markings small panels wonderful have shapes sizes perfect modeling Now lets talk about easy apply First base material heavy mylar thats good instructions call prerelease midair rubbing sheet have admit bit skeptical works Next simply apply finger pressure transfer shape desired area transfers advertised fuelproof once transferred simply ink type epoxy also can coated type clear coat great product works advertised Youll like it cheap nearly $12 sheet Contact Dry-Set Model Markings 7029 Sanger Avenue Waco Texas Tel 817 741-0379 Model Aviation --
