WE ALL have pet peeves misspelling ofthe word preventive has misspelled often some dictionaries acknowledge preventative acceptable variation word December 1979 column discussed periodic system maintenance preclude failures someone Model elation really stuck between ribs column contained preventative maintenance Sorry really know better Editors Note Guess now virtually contest un fortunate flier lands retractable gearequipped airplane too hard lands tall grass rips out least main gear Invariably gear installation too flimsy take much near-perfect landing probable technique installing South ern R/C Products retracts grossly overdesign ed has never failed five years hard use kinds landing surfaces Conse quently thought others might interested retracts installed first thing installing retracts foam wings identify bottom wing important because gear mechanism mount ed flush bottom wing shown schematically Fig 1 Fig exaggerated clarity Consequently cuts foam should made perpendicular bottom wing ways cut foam gear installation prefer use -in X-Acto saw blade back removed straight cuts coping saw blade circular cuts Others may prefer cutting hot nichrome wires sharpened bottoms drink cans dont like well what use lay out retract installation bottom wing using sharp felt-tipped pen After referring aircraft plans mark location gear pivot axis wheel well wing shown Fig 2 wheel well should approximately half inch larger diameter main gear wheels will used sure locations pivot axis wheel well accurate since gear installation set concrete Next mark location channel gear mechanism will recess channel should barely wider gear mechanism draw lines parallel channel spaced side shown Fig 3 Later -in space will filled -in balsa facing channel should long enough permit retract mechanism installed location pivot axis plus enough 1/16-in balsa facing end channel Most aircraft plans suggest retract mechanism bolted plywood plate 3/16 /4 thick use -in plate shown Fig 4 Continued page 115 Left Here Rons technique installing retractable gear foam wings installation sturdy attractive lightltext details Right Top side installation flush foam easy sheeting Rough ground weeds dont faze technique Fig 1 Fig5 Fig 2 PIVOT AXIS t 1 Fig 3 s/s WIDTH OF CHANNEL 3/5 30 Model Aviation Great looking trophies dont have cost lot money Crescent City RIC Club New Orleans presented beauties 1979 Fall Carnival Made club member damaged Ethan Allen dresser top Highlight 2nd Annual Eastern H/C Tournament I-year-old Unris Cheyer Manchester CT May youngest pattern competitor yet Fig 4 K---33/4 pitch helicopter also set up high coning angle avoid tail-boom strikes inverted negative pitch available power provided enough force ac tually flatten landing gear allow main frame Heliboy rest ground during run-up test high coning angle certainly necessary radio end throttle/collective stick set up center stick position idle movement forward positive movement aft position negative Mike flies throttle tail-rotor right stick cyclic left stick sort left-handed mode two Walt Schoonard calls Commode Entry inverted flight half roll approximate altitude 100 feet Once verted helicopter flown low 50 feet hovered inverted re corded videotape Mikes achievement will have demon strated again Rosemont Park Orlando FL Tangarine will demonstrated WRAMS Show Toledo weather permitting year plan attend Well thats month Congratula tions Mike Mas What will top Dare Chesnev Route 9 Box 621A Greens boro NC 27409 CL Navy Carrier/Perry continued page 52 Initial adjustments made setting meter just starting open adjusting exhaust slide about 1/16 open fully-closed position Check see meter fully open exhaust slide open adjust meter arm length necessary being careful closed positions affected engine now ready run Adjust needle valve proper high speed mixture first close throttle gradually An excessively rich engine speed reduced means exhaust slide closing ahead fuel meter mixture goes lean low speed meter slide relationship must adjusted slide closes earlier given meter position idle mixture good engine quits middle range rate fuel meter opening can adjusted using longer meter arm provide leaner mid-range mixture shorter meter arm provide richer mid-range mixture adjustments disrupt high speed setting notch meter will have modified process begun again trouble-free reliable throttle system have ever used consisted old Kavan pressure carburetor exhaust slide Kavan carb cam- actuated valve released tank pressure throttle closed set carb closed point engine ran about 12000 rpm remained position pressurerelief valve open Speed control between 12000 rpm full idle accomplished exhaust slide alone Kavan pressure carb has out pro duction some time similar system using large intake throttle separate pressurerelief valve could very rewarding someone willing spend little time developing system Ric1zardL Perry 416 WoodlzillDrive Golds boro NC 27530 Inexpensive key word ACES new line RIC kits called Silver Series line offers unique combination value s wide range versatility found todays R/C market until now rutting out biggest costs Labor furnish kit furnish labor allows us give top-quality product inexpensive price comparable $800 radios some its features SERVO REVERSAL SWITCHESWith juo rip nrnirch rho mono rraoel direcrroo 4each rho four primary chaunels can reversed * INDEPENDENT THROW AOJU5T-On chanosls rho aorouor srroo rranel can ho con rrollod odopondently * FIFTH CHANNEL ADIUST--Serno ponirion rho rrrracr srcirch eirher rho Up Down pot oo siodepeodensly adjusrahle * TRIM LOCATION VARIABLESThe lucarion rho rsirun rhe builders discrorico no can hoc aodad rim crossed trim conshinaSion rho rwo TRIM AUTHORITY PROGRAMMABILITY--By nhanng plug-in finod roritrors rho arooonr rrooxCornion rrimn wound proerammahie * DUAL RATE--Swirchen adjustment port furnished ro prooide DUAL RATE 00 op ro rhrechuneeln EXPONENTIAL RATE OPTION--This pIng-lu oprion prooiden non-livear serno rravel 0 rr anon ro trich monemenr up ro rhere chaanln $1795 * ELECTRONIC MIXER OPTIONWirh rhis plug-in module uny rmo functions can rogerher cirher uni-dierotionally hi-directionally 151195 PROGRAMMABLE PUSH BUTTON OPTION--In-flight adjonrahie pre-progrummed coerrol surface monemenr may obrained hy push ing hurroo S895 THE SILVER SEVEN $28495 Full ni-cd system kit receiver four servos February 1980 113 Cheek poor Ace dealer write eall nomplete details Complete Catalog $100 add $50 1st Class Meil retarrl Box 511E 119W 19th. Higginsville Mo 64037 816 584-7121
Edition: Model Aviation - 1980/02
Page Numbers: 30, 113
WE ALL have pet peeves misspelling ofthe word preventive has misspelled often some dictionaries acknowledge preventative acceptable variation word December 1979 column discussed periodic system maintenance preclude failures someone Model elation really stuck between ribs column contained preventative maintenance Sorry really know better Editors Note Guess now virtually contest un fortunate flier lands retractable gearequipped airplane too hard lands tall grass rips out least main gear Invariably gear installation too flimsy take much near-perfect landing probable technique installing South ern R/C Products retracts grossly overdesign ed has never failed five years hard use kinds landing surfaces Conse quently thought others might interested retracts installed first thing installing retracts foam wings identify bottom wing important because gear mechanism mount ed flush bottom wing shown schematically Fig 1 Fig exaggerated clarity Consequently cuts foam should made perpendicular bottom wing ways cut foam gear installation prefer use -in X-Acto saw blade back removed straight cuts coping saw blade circular cuts Others may prefer cutting hot nichrome wires sharpened bottoms drink cans dont like well what use lay out retract installation bottom wing using sharp felt-tipped pen After referring aircraft plans mark location gear pivot axis wheel well wing shown Fig 2 wheel well should approximately half inch larger diameter main gear wheels will used sure locations pivot axis wheel well accurate since gear installation set concrete Next mark location channel gear mechanism will recess channel should barely wider gear mechanism draw lines parallel channel spaced side shown Fig 3 Later -in space will filled -in balsa facing channel should long enough permit retract mechanism installed location pivot axis plus enough 1/16-in balsa facing end channel Most aircraft plans suggest retract mechanism bolted plywood plate 3/16 /4 thick use -in plate shown Fig 4 Continued page 115 Left Here Rons technique installing retractable gear foam wings installation sturdy attractive lightltext details Right Top side installation flush foam easy sheeting Rough ground weeds dont faze technique Fig 1 Fig5 Fig 2 PIVOT AXIS t 1 Fig 3 s/s WIDTH OF CHANNEL 3/5 30 Model Aviation Great looking trophies dont have cost lot money Crescent City RIC Club New Orleans presented beauties 1979 Fall Carnival Made club member damaged Ethan Allen dresser top Highlight 2nd Annual Eastern H/C Tournament I-year-old Unris Cheyer Manchester CT May youngest pattern competitor yet Fig 4 K---33/4 pitch helicopter also set up high coning angle avoid tail-boom strikes inverted negative pitch available power provided enough force ac tually flatten landing gear allow main frame Heliboy rest ground during run-up test high coning angle certainly necessary radio end throttle/collective stick set up center stick position idle movement forward positive movement aft position negative Mike flies throttle tail-rotor right stick cyclic left stick sort left-handed mode two Walt Schoonard calls Commode Entry inverted flight half roll approximate altitude 100 feet Once verted helicopter flown low 50 feet hovered inverted re corded videotape Mikes achievement will have demon strated again Rosemont Park Orlando FL Tangarine will demonstrated WRAMS Show Toledo weather permitting year plan attend Well thats month Congratula tions Mike Mas What will top Dare Chesnev Route 9 Box 621A Greens boro NC 27409 CL Navy Carrier/Perry continued page 52 Initial adjustments made setting meter just starting open adjusting exhaust slide about 1/16 open fully-closed position Check see meter fully open exhaust slide open adjust meter arm length necessary being careful closed positions affected engine now ready run Adjust needle valve proper high speed mixture first close throttle gradually An excessively rich engine speed reduced means exhaust slide closing ahead fuel meter mixture goes lean low speed meter slide relationship must adjusted slide closes earlier given meter position idle mixture good engine quits middle range rate fuel meter opening can adjusted using longer meter arm provide leaner mid-range mixture shorter meter arm provide richer mid-range mixture adjustments disrupt high speed setting notch meter will have modified process begun again trouble-free reliable throttle system have ever used consisted old Kavan pressure carburetor exhaust slide Kavan carb cam- actuated valve released tank pressure throttle closed set carb closed point engine ran about 12000 rpm remained position pressurerelief valve open Speed control between 12000 rpm full idle accomplished exhaust slide alone Kavan pressure carb has out pro duction some time similar system using large intake throttle separate pressurerelief valve could very rewarding someone willing spend little time developing system Ric1zardL Perry 416 WoodlzillDrive Golds boro NC 27530 Inexpensive key word ACES new line RIC kits called Silver Series line offers unique combination value s wide range versatility found todays R/C market until now rutting out biggest costs Labor furnish kit furnish labor allows us give top-quality product inexpensive price comparable $800 radios some its features SERVO REVERSAL SWITCHESWith juo rip nrnirch rho mono rraoel direcrroo 4each rho four primary chaunels can reversed * INDEPENDENT THROW AOJU5T-On chanosls rho aorouor srroo rranel can ho con rrollod odopondently * FIFTH CHANNEL ADIUST--Serno ponirion rho rrrracr srcirch eirher rho Up Down pot oo siodepeodensly adjusrahle * TRIM LOCATION VARIABLESThe lucarion rho rsirun rhe builders discrorico no can hoc aodad rim crossed trim conshinaSion rho rwo TRIM AUTHORITY PROGRAMMABILITY--By nhanng plug-in finod roritrors rho arooonr rrooxCornion rrimn wound proerammahie * DUAL RATE--Swirchen adjustment port furnished ro prooide DUAL RATE 00 op ro rhrechuneeln EXPONENTIAL RATE OPTION--This pIng-lu oprion prooiden non-livear serno rravel 0 rr anon ro trich monemenr up ro rhere chaanln $1795 * ELECTRONIC MIXER OPTIONWirh rhis plug-in module uny rmo functions can rogerher cirher uni-dierotionally hi-directionally 151195 PROGRAMMABLE PUSH BUTTON OPTION--In-flight adjonrahie pre-progrummed coerrol surface monemenr may obrained hy push ing hurroo S895 THE SILVER SEVEN $28495 Full ni-cd system kit receiver four servos February 1980 113 Cheek poor Ace dealer write eall nomplete details Complete Catalog $100 add $50 1st Class Meil retarrl Box 511E 119W 19th. Higginsville Mo 64037 816 584-7121