Gary Shaw SHORT ANTENNA lived Tennessee several years ago spent Saturday afternoons flying group guys Millington Barnstormers RIC Flying Club active club members loved fly several liked build fly some oddest creations could ever imagine Anyway loved get involved heckle cajole whenever new model brought out field its first flight Being good modelers fun gather around lend few constructive comments take few pictures offer check trim etc stand hack watch aircrafts first flight time great fun good memones Arriving remind of fun letter Jim antennas An airplane two lost destroyed because receiver antennas snapping off exit fuselage Jim indicated problem stems vibrating whipping action antenna takes place airplane flies through air Eventually antenna gets cut two model goes out controlnot good thing So whats fix Jim wrote that should drill hole fuselage want antenna exit should big enough accommodate two-inch piece fuel tubing retract tubing Once inserted hole run antenna through tubing secure tail rubber band Jims knowledge no knows has ever damaged antenna lost airplane using configuration Better safe sorry Safely Buy Used Equipment what seems endless sea new used Radio Control RC products market thought necessary provide few tips regarding what look decide go cheaper route buy used equipment buy used stuff bet Does work Most time safe Almost always youre concerned about what look before plopping down green perhaps review few tips hardworking crew Flight Line Newsletter Bryan Jones editor order Have ever presented deal too good nije Sometimes good deals other times . well thing have benefit living Houston area very large group RC airplane fliers several outlets buying trading model airplanes related accessories Regardless go find used equipment desire few tips have learned may want consider Airframes easiest items inspect first easiest items check covering paint Having wellapplied thoroughly sealed covering coating important keeping oil other materials underlying wood fiberglass Water oil-soaked structures will eventually weaken fail Look engine compartment sealing have mentioned Exposed wood easy spot Another area critical airplanes structural integrity wing saddle attachment structure Look cracks evidence previous repairs Generally joint having repaired will weaker originally constructed joint shows sign repair indicates design crash damage Assume crash damage inspect tail feathers other exposed inner surfaces fuselage Wings little mystery fuselage Without breaking wing place over knee apply bending pressure Listen cracking noises Stop Look splinters falling out openings Check control surface tightness proper operation Look wingtip damage Wingtip damage comes two forms First underside scrapes caused ground loops hard landings Second crunching effect end wingtip caused cartwheels Cartwheels will trash model quicker almost anything . . . . . . 7 Engines Purchasing used engine quite easy purchasing empty airframe first item concern external damage Look dirt particularly packed between forward cooling fins around carburetor pretty good indicator crash Dont forget look en cooling fins bent needle valves Once have checked engine externally look cylinder head Assure head bolts present Check crankshaft Look buggered threads thing strongly recommend checking shaft runout dial indicator similar instrument wouldnt accept 002-inch TIR total indicated runout 60 smaller engines 003-inch TIR others Bear mind measurement should weighed relation rest engine runout measurements pretty high Look exhaust port cylinder muffler attached remove Slowly turn over engine feeling condition bearings piston/cylinder liner fit Look down port piston liner Look gouging 68 Model Aviation laman wrote describe problem encountered receiver excessive scraping scratches Feel engine turned over Notice grinding gritty feel bearings Try find out engine has ball bearings sleeve bearings shaft ball bearing engine good bearings valuable Hang onto dial indicator used earlier set up check shaft looseness get indicator set up pull shaft opposite direction being pulled set up indicator engines 60 smaller 001 002 inches reasonable Larger engines can withstand 003-005 looseness Finally check thrust shaft holding engine hand push pull shaft turning Note noises unusual feels such metal-onmetal rubbing gritty feel particularly problem inactive reverse thrust direction may real problem indicator active normal thrust direction have purposely skipped four-stroke engines couple reasons First subject deserved space available second would have research issue before writing Radio Gear challenging area previous two Bear mind consequences complete radio failure . pretty Keep mind about make killer deal have few easy items look buying used radio gear items typically indicate actual condition internals very representative indicator First general external appearance transmitter receiver servos important Look dirt glue fuel residue None good important check switch harness end another must use used item dont recommend use switches have purchased new failed switch switch lead game over external condition transmitter good indicator entire system treated its previous owner Check bottom back transmitter case excessive scratches indicates amount use system has Less scratches less use good good Check feel gimbals Smooth tight Check trim switches auxiliary switches Extend antenna checking bends damage Turn transmitter check output/power needle response Obviously batteries may dead undercharged Look receiver antenna good shape kinked stressed antenna indicates rough use possible damage Look cracks case Check narrowband certification Check bent pins open sockets servos least important items dont forget takes well-placed servo failure wreck airplane First check outward appearance leads important well Look see wires damaged attached plug Look plug damage Carefully check gear train rotating servo head strip servo may have buy wrecked servo Dont step dont feel sure what doing feel listen broken gear teeth Flight battery packbe very careful wouldnt recommend using flight pack dont have cycler/charger verify capacity health battery Dont forget look lead Its just important battery switch Finally connect components system operate transmitter Check channel individually check dual rates check programmability applicable check servo response noise chatter dragging speed etc possible perform range checkcollapsed antenna 200 feet minimum fully operational just few items keep mind purchasing used equipment everything checked out described possibility equipment near breaking down someone trying sell away hidden problem Until next month play safe h 1998 69 H RO KEN ~POEM5 b-uSC Aero & Marine Engines Rebuilt ired ted K&B can make engine like new again need send us K&B engine will repaired original parts Labor charge $7 50 $12 50 520-4533579 2100 College Drive Lake Havasu City AZ 06403 NOTE Sone engine mey nol sedoceobie doe oge onoondoton sopteose coil Wane send,g n engJne qp MIDWEST PRODUCTS CO INC . 3 3
Edition: Model Aviation - 1998/03
Page Numbers: 68, 69
Edition: Model Aviation - 1998/03
Page Numbers: 68, 69
Gary Shaw SHORT ANTENNA lived Tennessee several years ago spent Saturday afternoons flying group guys Millington Barnstormers RIC Flying Club active club members loved fly several liked build fly some oddest creations could ever imagine Anyway loved get involved heckle cajole whenever new model brought out field its first flight Being good modelers fun gather around lend few constructive comments take few pictures offer check trim etc stand hack watch aircrafts first flight time great fun good memones Arriving remind of fun letter Jim antennas An airplane two lost destroyed because receiver antennas snapping off exit fuselage Jim indicated problem stems vibrating whipping action antenna takes place airplane flies through air Eventually antenna gets cut two model goes out controlnot good thing So whats fix Jim wrote that should drill hole fuselage want antenna exit should big enough accommodate two-inch piece fuel tubing retract tubing Once inserted hole run antenna through tubing secure tail rubber band Jims knowledge no knows has ever damaged antenna lost airplane using configuration Better safe sorry Safely Buy Used Equipment what seems endless sea new used Radio Control RC products market thought necessary provide few tips regarding what look decide go cheaper route buy used equipment buy used stuff bet Does work Most time safe Almost always youre concerned about what look before plopping down green perhaps review few tips hardworking crew Flight Line Newsletter Bryan Jones editor order Have ever presented deal too good nije Sometimes good deals other times . well thing have benefit living Houston area very large group RC airplane fliers several outlets buying trading model airplanes related accessories Regardless go find used equipment desire few tips have learned may want consider Airframes easiest items inspect first easiest items check covering paint Having wellapplied thoroughly sealed covering coating important keeping oil other materials underlying wood fiberglass Water oil-soaked structures will eventually weaken fail Look engine compartment sealing have mentioned Exposed wood easy spot Another area critical airplanes structural integrity wing saddle attachment structure Look cracks evidence previous repairs Generally joint having repaired will weaker originally constructed joint shows sign repair indicates design crash damage Assume crash damage inspect tail feathers other exposed inner surfaces fuselage Wings little mystery fuselage Without breaking wing place over knee apply bending pressure Listen cracking noises Stop Look splinters falling out openings Check control surface tightness proper operation Look wingtip damage Wingtip damage comes two forms First underside scrapes caused ground loops hard landings Second crunching effect end wingtip caused cartwheels Cartwheels will trash model quicker almost anything . . . . . . 7 Engines Purchasing used engine quite easy purchasing empty airframe first item concern external damage Look dirt particularly packed between forward cooling fins around carburetor pretty good indicator crash Dont forget look en cooling fins bent needle valves Once have checked engine externally look cylinder head Assure head bolts present Check crankshaft Look buggered threads thing strongly recommend checking shaft runout dial indicator similar instrument wouldnt accept 002-inch TIR total indicated runout 60 smaller engines 003-inch TIR others Bear mind measurement should weighed relation rest engine runout measurements pretty high Look exhaust port cylinder muffler attached remove Slowly turn over engine feeling condition bearings piston/cylinder liner fit Look down port piston liner Look gouging 68 Model Aviation laman wrote describe problem encountered receiver excessive scraping scratches Feel engine turned over Notice grinding gritty feel bearings Try find out engine has ball bearings sleeve bearings shaft ball bearing engine good bearings valuable Hang onto dial indicator used earlier set up check shaft looseness get indicator set up pull shaft opposite direction being pulled set up indicator engines 60 smaller 001 002 inches reasonable Larger engines can withstand 003-005 looseness Finally check thrust shaft holding engine hand push pull shaft turning Note noises unusual feels such metal-onmetal rubbing gritty feel particularly problem inactive reverse thrust direction may real problem indicator active normal thrust direction have purposely skipped four-stroke engines couple reasons First subject deserved space available second would have research issue before writing Radio Gear challenging area previous two Bear mind consequences complete radio failure . pretty Keep mind about make killer deal have few easy items look buying used radio gear items typically indicate actual condition internals very representative indicator First general external appearance transmitter receiver servos important Look dirt glue fuel residue None good important check switch harness end another must use used item dont recommend use switches have purchased new failed switch switch lead game over external condition transmitter good indicator entire system treated its previous owner Check bottom back transmitter case excessive scratches indicates amount use system has Less scratches less use good good Check feel gimbals Smooth tight Check trim switches auxiliary switches Extend antenna checking bends damage Turn transmitter check output/power needle response Obviously batteries may dead undercharged Look receiver antenna good shape kinked stressed antenna indicates rough use possible damage Look cracks case Check narrowband certification Check bent pins open sockets servos least important items dont forget takes well-placed servo failure wreck airplane First check outward appearance leads important well Look see wires damaged attached plug Look plug damage Carefully check gear train rotating servo head strip servo may have buy wrecked servo Dont step dont feel sure what doing feel listen broken gear teeth Flight battery packbe very careful wouldnt recommend using flight pack dont have cycler/charger verify capacity health battery Dont forget look lead Its just important battery switch Finally connect components system operate transmitter Check channel individually check dual rates check programmability applicable check servo response noise chatter dragging speed etc possible perform range checkcollapsed antenna 200 feet minimum fully operational just few items keep mind purchasing used equipment everything checked out described possibility equipment near breaking down someone trying sell away hidden problem Until next month play safe h 1998 69 H RO KEN ~POEM5 b-uSC Aero & Marine Engines Rebuilt ired ted K&B can make engine like new again need send us K&B engine will repaired original parts Labor charge $7 50 $12 50 520-4533579 2100 College Drive Lake Havasu City AZ 06403 NOTE Sone engine mey nol sedoceobie doe oge onoondoton sopteose coil Wane send,g n engJne qp MIDWEST PRODUCTS CO INC . 3 3
