M RACK typewriter again after short break Nats coverage Frank Kelly handled year Thanks Frank rm getting settled new job hope back Nats again next year Ill flying out North Carolina next few years hope take few East Coast contests havent attended yet month am continuing discussion engine speed control systems use exhaust slide covered last column Since writing last column rye talked Kris Jones 6125 Tujunga Ave North Hollywood CA 91606 seen some exhaust slides has installed want slide dont want work yourself contact Kris prices exhaust slide type speed control originally used suction engines significant improvement over intake clappers other crude todays standards intake throttles As engine speed reduced ex haust back-pressure airflow through intake decreased resulting automatic mixture compensation advent pressure fuel systems higher speeds made exhaust slides practical because engine flooding speed reduced fuel flow remaining less constant Enter Bill Johnson simple metering device coupled exhaust slide reduced fuel flow engine rpm decreased system remains common means speed control pressurized Class II engines diagram shows principal features Johnson-type fuel meter Construction fairly simple critical portion being fit between moveable stationary internal pieces ends eter internal pieces must square smooth proper seal edges must rounded meter work properly body should constructed first fuel inlet outlet holes should drilled sharp drill after inlet outlet tubes soldered -in diameter internal valve seat outer hole predrilled should soldered body covers slightly less half inlet hole Care must used avoid getting solder valve seat area inlet hole fuel meter best mounted engine throttle can adjusted engine out model since initial adjustments can rather time-consuming Continued page 113 52 Model Aviation Roland Baltes Class II Myrt uses Hossi Ut tuel meter eXnaUst slide type control very popular scale Carrier classes Dick tark s Liass Ii Mauler catcnes tne tnira iine ur panaci UUUIIIt landing Model Sturdi built kit ST 60 suction 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: 52, 113
M RACK typewriter again after short break Nats coverage Frank Kelly handled year Thanks Frank rm getting settled new job hope back Nats again next year Ill flying out North Carolina next few years hope take few East Coast contests havent attended yet month am continuing discussion engine speed control systems use exhaust slide covered last column Since writing last column rye talked Kris Jones 6125 Tujunga Ave North Hollywood CA 91606 seen some exhaust slides has installed want slide dont want work yourself contact Kris prices exhaust slide type speed control originally used suction engines significant improvement over intake clappers other crude todays standards intake throttles As engine speed reduced ex haust back-pressure airflow through intake decreased resulting automatic mixture compensation advent pressure fuel systems higher speeds made exhaust slides practical because engine flooding speed reduced fuel flow remaining less constant Enter Bill Johnson simple metering device coupled exhaust slide reduced fuel flow engine rpm decreased system remains common means speed control pressurized Class II engines diagram shows principal features Johnson-type fuel meter Construction fairly simple critical portion being fit between moveable stationary internal pieces ends eter internal pieces must square smooth proper seal edges must rounded meter work properly body should constructed first fuel inlet outlet holes should drilled sharp drill after inlet outlet tubes soldered -in diameter internal valve seat outer hole predrilled should soldered body covers slightly less half inlet hole Care must used avoid getting solder valve seat area inlet hole fuel meter best mounted engine throttle can adjusted engine out model since initial adjustments can rather time-consuming Continued page 113 52 Model Aviation Roland Baltes Class II Myrt uses Hossi Ut tuel meter eXnaUst slide type control very popular scale Carrier classes Dick tark s Liass Ii Mauler catcnes tne tnira iine ur panaci UUUIIIt landing Model Sturdi built kit ST 60 suction 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