RADIO CONTROL JETS fr1I.J-1a lUlL AMT MERCURY AMA Turbine Committee just got its first opportunity observe run AMTs new Mercury 15-pound-thrust turbine definite winner Starting ease simplicity assured ECU controller including previous safety features Accel/decel rate 2-2 seconds limit-to-limit absolute smooth steadiness throughout Max fuel consumption seven ounces/minute full throttle engine definitely desirable propulsion package Data application AMA recognition production engine has already submitted testbed aircraft Turbinetime will get new lease life increased thrust issue engine arrives Production deliveries anticipated initiate about April May CAI-Sophia Turbines CM Scotty Balduc working closely Sophia USA launch CAl ECU-controlled production version current Sophia turbine Data being prepared submittal AMA Turbine Committee will testing engine version just two weeks written Preliminary data controller pump looks very promising Sophia currently offering its engine new ECU system Germany will testing version well engine produces 13 pounds thrust either system priced mid-$3000 range AMA Turbine Test Programs addition evaluating new production engines Turbine Committee has commissioned conduct three experimental programs regarding turbines Twin Turbine Installation installing two Sophia turbines CM controllers Yellow Aircraft F- 18 evaluate complexities multiple-engine operation 35-Pound Thrust Operation examining safety issues regarding single-engine increased thrust fortunate being offered access AMTs 35-pound-thrust Olympus engine installed Yellow Aircraft F- 18 Initial experience mentioned last RC Jets column Thrust-to-Weight Increase Evaluation building Century Jet Models F-104 recently introduced market installation RAMs T750 turbine dry thrust-to-weight up 12 anticipated achievable Whether choose test extreme speculative An engineering approach incremental increases planned have extreme confidence engine after long weekend running bench Heart Ohio Ducted Fan Hints following major contribution article submitted Jim Hiller Jim accomplished builder flier well-known jet community member Turbine Committee talk jet turbine engines has replaced ducted-fan models nor does appear will near future Over years have watched modelers start ducted-fan modeling quit after limited success Success ducted-fan modeling isnt black magicits just leaming special needs high-performance equipment Most modelers first ducted-fan model also first experience high-performance engines fully cowled engines retracts high wing loadings overwhelming first joy flying ducted-fan models Which ducted-fan setup buy choice have owned Bob Violett Models BVM Dynamax systems have helped others almost other systems market good success Most ducted-fan system manufacturers have done excellent job developing products grass-field fliers obstacles climb over Byron system has earned good reputation Turbax system its smaller 45 engine has eamed following its cost reliability suggest purchase fan unit engine tuned pipe package way buying engineered power package Trying create own match ducted fan engine tuned pipe etc doomed failure leave experienced engine developers engines made racing tuning chores critical introduction ducted-fan modeling also first experience head shims adjust compression ratio weather conditions important ducted fan engines 72-105 range require head shims humid weather getting 6-10 flights plug need add head shims break start flying new engines two head shims remove head shims based plug life humid days have learned just add head shim conservative approach hate deadstick landings heavy models Setup needle settings critical top-end setting lean side will quickly overheat engine flight needle setting slightly 126 Model Aviation d Maichiones ducted-fan F-4 Best Scale Jet Heart Ohio 97 Century Jet Models prototype F-104 Heart Ohio 97 Jerry Kerr Sr starting hot ducted-fan Terminator rich side peaked will develop much power will overheat flight engines tend get hot easily idle needle setting sensitive engines take time frustrating because idle setting engine hatch off may right Just patient get right good hint given Larry Wolfe idle pinch fuel line listen engine quits rich will speed up quits lean engine will slowly wind down rpm final test engine hatch need mixture control wouldnt have developed wasnt need flew two years reliably put airplane now wont build model mixture control great optionparticularly have limited runway obstacles clear after takeoff ability tweak needle takeoff power richen mixture fuel bums keeps maximum power available whole flight ducted-fan engines tend lean out fuel bums off necessary just highly recommended convenience What fuel use Most engines need high oil content because higher rpms temperatures strongly suggest against running engines anything less recommended fuels engines too expensive otherwise Glow plugs high-compression engines have specific requirements Use plug recommended power system manufacturer use McCoy MC-9 K&B HP plugs brother swears McCoy MC-9 Rossi plugs difference engine fan units have Again follow recommendations manufacturer given reliable plugs available Lets discuss selection model excellent kits available meet needs key success determine needs ducted-fan models suitable grass-field operation Some models have 45-60-ounce wing loadings 2inch-diameter tires would suggest look design more-reasonable wing loading plan fly grass regularly Regal Eagle Eagle similar designs have proven effective grass-field operations opinion though since full-scale jets fly paved runways models fly paved runways pilot techniques required ducted-fan model different After takeoff cannot just pull back elevator climb thrust ducted fan less propeller low speeds greater high speeds jets tend have low-aspect-ratio wings climb well low airspeeds proper technique after takeoff level off gain airspeed prior attempting climb hanging elevator attempt climb will get behind power curve wont clear trees would suggest least 500-foot runway 800 feet nearest tree line expect chance test flights conservative approach subject will greatly increase chances success Landing will probably new experience because higher wing loadings Most ducted-fan models have 44-60 ounces per square foot wing loadings Just silly number little meaning until have flown airplane such wing loading Landing speeds much higher normal control just good Fly airplane watching angle attacknot airspeedif can higher landing speeds reasons suggest test flights done longest runway can findpreferably paved Ill drive three hours down RC Aviation Country Club just test-fly models have long paved runway am fortunate occasions Jerry Kerr Jr experienced ducted-fan modeler area comes out keeps honest after years ducted fan modeling still take test flight airplanes seriously bug bites join us ducted fan modeling give call Jet Pilots Organization JPO Special Interest Group dedicated promote ducted-fan jet modeling Im sure officers will help get touch local ducted fan modelers can help leaming curve 1998 127 Muncie Model & Hobby well established hobby shop Muncie area next AMA National Flying Site * Kits * Engines * Radios * Supplies Control Line Free Flight R/G HO Slot Car Track Supplies Weekly Racing Memonal Drive 8 Nation Flying5ite125S 0 Muncie Model & Hobby 2645 5 CR 400 E Muncie IN 47302 76-289-5856 Best Balsa Aircraft Grade Plywood Spruce & USA Gold CA Adhesives Call Write BALSA USA PO Box 164 Marinette WI 54143 1-800-225-7287 Fax 1-906-863-5878 Send $100 new Catalog Catalog Free order Check us out Internet http//wwwbalsausacom
Edition: Model Aviation - 1998/06
Page Numbers: 126, 127
Edition: Model Aviation - 1998/06
Page Numbers: 126, 127
RADIO CONTROL JETS fr1I.J-1a lUlL AMT MERCURY AMA Turbine Committee just got its first opportunity observe run AMTs new Mercury 15-pound-thrust turbine definite winner Starting ease simplicity assured ECU controller including previous safety features Accel/decel rate 2-2 seconds limit-to-limit absolute smooth steadiness throughout Max fuel consumption seven ounces/minute full throttle engine definitely desirable propulsion package Data application AMA recognition production engine has already submitted testbed aircraft Turbinetime will get new lease life increased thrust issue engine arrives Production deliveries anticipated initiate about April May CAI-Sophia Turbines CM Scotty Balduc working closely Sophia USA launch CAl ECU-controlled production version current Sophia turbine Data being prepared submittal AMA Turbine Committee will testing engine version just two weeks written Preliminary data controller pump looks very promising Sophia currently offering its engine new ECU system Germany will testing version well engine produces 13 pounds thrust either system priced mid-$3000 range AMA Turbine Test Programs addition evaluating new production engines Turbine Committee has commissioned conduct three experimental programs regarding turbines Twin Turbine Installation installing two Sophia turbines CM controllers Yellow Aircraft F- 18 evaluate complexities multiple-engine operation 35-Pound Thrust Operation examining safety issues regarding single-engine increased thrust fortunate being offered access AMTs 35-pound-thrust Olympus engine installed Yellow Aircraft F- 18 Initial experience mentioned last RC Jets column Thrust-to-Weight Increase Evaluation building Century Jet Models F-104 recently introduced market installation RAMs T750 turbine dry thrust-to-weight up 12 anticipated achievable Whether choose test extreme speculative An engineering approach incremental increases planned have extreme confidence engine after long weekend running bench Heart Ohio Ducted Fan Hints following major contribution article submitted Jim Hiller Jim accomplished builder flier well-known jet community member Turbine Committee talk jet turbine engines has replaced ducted-fan models nor does appear will near future Over years have watched modelers start ducted-fan modeling quit after limited success Success ducted-fan modeling isnt black magicits just leaming special needs high-performance equipment Most modelers first ducted-fan model also first experience high-performance engines fully cowled engines retracts high wing loadings overwhelming first joy flying ducted-fan models Which ducted-fan setup buy choice have owned Bob Violett Models BVM Dynamax systems have helped others almost other systems market good success Most ducted-fan system manufacturers have done excellent job developing products grass-field fliers obstacles climb over Byron system has earned good reputation Turbax system its smaller 45 engine has eamed following its cost reliability suggest purchase fan unit engine tuned pipe package way buying engineered power package Trying create own match ducted fan engine tuned pipe etc doomed failure leave experienced engine developers engines made racing tuning chores critical introduction ducted-fan modeling also first experience head shims adjust compression ratio weather conditions important ducted fan engines 72-105 range require head shims humid weather getting 6-10 flights plug need add head shims break start flying new engines two head shims remove head shims based plug life humid days have learned just add head shim conservative approach hate deadstick landings heavy models Setup needle settings critical top-end setting lean side will quickly overheat engine flight needle setting slightly 126 Model Aviation d Maichiones ducted-fan F-4 Best Scale Jet Heart Ohio 97 Century Jet Models prototype F-104 Heart Ohio 97 Jerry Kerr Sr starting hot ducted-fan Terminator rich side peaked will develop much power will overheat flight engines tend get hot easily idle needle setting sensitive engines take time frustrating because idle setting engine hatch off may right Just patient get right good hint given Larry Wolfe idle pinch fuel line listen engine quits rich will speed up quits lean engine will slowly wind down rpm final test engine hatch need mixture control wouldnt have developed wasnt need flew two years reliably put airplane now wont build model mixture control great optionparticularly have limited runway obstacles clear after takeoff ability tweak needle takeoff power richen mixture fuel bums keeps maximum power available whole flight ducted-fan engines tend lean out fuel bums off necessary just highly recommended convenience What fuel use Most engines need high oil content because higher rpms temperatures strongly suggest against running engines anything less recommended fuels engines too expensive otherwise Glow plugs high-compression engines have specific requirements Use plug recommended power system manufacturer use McCoy MC-9 K&B HP plugs brother swears McCoy MC-9 Rossi plugs difference engine fan units have Again follow recommendations manufacturer given reliable plugs available Lets discuss selection model excellent kits available meet needs key success determine needs ducted-fan models suitable grass-field operation Some models have 45-60-ounce wing loadings 2inch-diameter tires would suggest look design more-reasonable wing loading plan fly grass regularly Regal Eagle Eagle similar designs have proven effective grass-field operations opinion though since full-scale jets fly paved runways models fly paved runways pilot techniques required ducted-fan model different After takeoff cannot just pull back elevator climb thrust ducted fan less propeller low speeds greater high speeds jets tend have low-aspect-ratio wings climb well low airspeeds proper technique after takeoff level off gain airspeed prior attempting climb hanging elevator attempt climb will get behind power curve wont clear trees would suggest least 500-foot runway 800 feet nearest tree line expect chance test flights conservative approach subject will greatly increase chances success Landing will probably new experience because higher wing loadings Most ducted-fan models have 44-60 ounces per square foot wing loadings Just silly number little meaning until have flown airplane such wing loading Landing speeds much higher normal control just good Fly airplane watching angle attacknot airspeedif can higher landing speeds reasons suggest test flights done longest runway can findpreferably paved Ill drive three hours down RC Aviation Country Club just test-fly models have long paved runway am fortunate occasions Jerry Kerr Jr experienced ducted-fan modeler area comes out keeps honest after years ducted fan modeling still take test flight airplanes seriously bug bites join us ducted fan modeling give call Jet Pilots Organization JPO Special Interest Group dedicated promote ducted-fan jet modeling Im sure officers will help get touch local ducted fan modelers can help leaming curve 1998 127 Muncie Model & Hobby well established hobby shop Muncie area next AMA National Flying Site * Kits * Engines * Radios * Supplies Control Line Free Flight R/G HO Slot Car Track Supplies Weekly Racing Memonal Drive 8 Nation Flying5ite125S 0 Muncie Model & Hobby 2645 5 CR 400 E Muncie IN 47302 76-289-5856 Best Balsa Aircraft Grade Plywood Spruce & USA Gold CA Adhesives Call Write BALSA USA PO Box 164 Marinette WI 54143 1-800-225-7287 Fax 1-906-863-5878 Send $100 new Catalog Catalog Free order Check us out Internet http//wwwbalsausacom
