U Joe Wagner 7TL7zc ux ECENT COLUMN wrote Few reference books devoted model airplane engines available nowadays response statement Dave Gierke mailed copy book 2-Stroke Glow Engines RIC Aircraft truly comprehensive exceptionally well-written thoroughly illustrated work covers considerably territory its title suggests first dozen chapters Daves book cover general theory design development model airplane engines including material early spark-ignition typesand Free Flight Control Line power plants latter half book devoted operational topics cant think significant area Dave has missed five chapters Running Right provide thorough explanation model engine procedure Ive read choosing propeller first break-in runs throttle adjustment flight Dave covers art two-stroke model airplane engine operation minute detail becoming bogged down boring minor technicalities Though theres no previous contact between Dave Gierke recommendations running maintaining glow engines almost identical example topic mixture setting Dave writes mixture should set slightly rich maximum power modelers insist upon leaning mixture attempt squeeze out highest possible engine speed . asking trouble Piston ring damage possible varnish deposits certainty castor oil lubricant used fuel because increased temperatures encountered truth engines can operated noticeably rich still produce power near maximum fear damage Dave recommends breaking new model engines test stand instead airplane minimum 20% oil fuel including some castor cleaning devarnishing procedure thats identical Ive developed over last /3 century own use highly recommend Daves book can buy $1795 postpaid direct Dave Gierke Flying Models Box 83 Bowmansville NY 14026 copy Daves bookplus Eric Cluttons classic Dr Diesels Diarywill tell almost everything youll ever need know about two-stroke model airplane engine operation Longtime engine experimenter Bill Dahlgren Glenview IL dislikes concept model engine customizationlargely because much has done thoughtlessly Bill writes Ive gotten downright annoyed doofs seem compelled such things sawing off O&R exhaust stack name streamlining thereby messing up perfectly good engine no good reason other hand has acquired such butchered engine can feel free some real improving Someone hacksawed exhaust stacks ED246 Racer destroyed cylinder seating area process Some machine work top crankcase turned-up adapter ring restored cylinder seatingand since backplate assembly also disappeared adapter made accept reed-valve hackplate Cox Sportsman 15 Success 46 Model Aviation omization Bill Dahigren butchered ED diesel resulted fine-performing hybrid Authors all-time favorite model engines Ohlsson 23 popular Mills 75 047 Cu diesel Replicas have sparker OK Cub 049 glow Low rpm high fun made seven companies five countries hybrid runs rather better stock ED Racer Ive seen has returned flying status what would otherwise have become landfill Bill Dahlgrens certainly right about model engine butchery engine-collecting days encountered botched attempt customization hope provided some educational experience perpetratorsteaching what future recent remarks column about impossibility answering question Whats best engine 2 brought few responses form related query time can provide some answers Whats favorite model engine Ill have equivocate bit Ive enjoyable experiences model power plants over past six decades Free Flight Control Line Radio Control airplanes example fondly recall Arden 099 19 immediate postwar years beautifully designed made highly reliable runners pioneered development glow plug Yet cant truly place Ardens among favorites because too fragile couldnt stand up punishment day-in day-out sport flying Taking everything about account Ill have vote Ohlsson 23 OK Cub 049 all-time favorite model power plants Ive received flying pleasure fewer pesky problems two engine types others though some have come mighty close level terms worldwide popularity no model engine compares Mills 75an 047 cu British diesel design Introduced 50 years ago little Mills has long gone out production its original manufacturer Yet its persistent popularity has inspired replication Mills 75 over world China India Australia Russia Britain Replica Mills 75 diesels made India original British tooling presently available US Carlson Engine Imports 814 East Marconi Ave Phoenix AZ 85022 proper fuel Mills 75s start run just well today ever antiquish sideport long-stroke design has never surpassed sheer friendliness reliability qualities record-breaking power output what appeal sport type model airplane flierswho have always far outnumbered competition-minded set same qualities what made Ohlsson 23 OK Cub 049 immensely popular day low rpm less 10000 made possible millions youngsters fly engine-powered mufflerless model airplanes schoolyards neighborhood ballfields over America seriously annoying nearby residents Millions active model airplane fliers meant millions engine sales Ohlsson OK enjoyed total sales volume measured seven figures popular engines 23 made 1939 1949 almost four-year-long interruption during WW II Cub 049 market continuously 1949 through mid-1960s direct sales modelers occurring first seven eight years During heyday two model engines sold annual rate 10 times high anything todays model engine market Almost beginning model engine enthusiasts have curious concerned about performance criterion has always rpm Yet few ways accurately measure rpm have readily available modelers Early attempts rpm measurement via vibrating wires inaccurate precision instruments cost far too much hobbyists afford advent inexpensive phototransistors circa 1965 electronic tachometers appeared hobby market analog-type tachometers indicate rpm dial like voltmeter Theyre handy useful toolsbut imprecise require occasional recalibration digital-type tachometers appeared direct readouts first looked like major improvement art model engine rpm measurement Yet devices too weaknesses annoyed lot incessant dithering last two digits readout now Tony Criscimagna TNC Electronics 2 Whites Lane Woodstock NY 12498 has made breakthrough new digital/optical Sensi-Tach uses high-precision crystal oscillator circuit instead earlier less expensive timer chip modules earlier digital/optical tachometers Thus Sensi-Tach never needs calibration its readout panel design displays rpm nearest hundred eliminates confusing digital jitter less-expensive tachs Some modelers seem use tachometers mainly provide bragging data Webra turns up 2200 rpm SuperTigre Bobs OS idles woy lower Enya tach can real help throughout life model engine During break-in accurate tach allows monitor progress procedure can tell youve reached goal Some engines given production batch require much break-in time others After engine well run-in record its normal rpm range made precision tach can act standard compare future performance find example top rpm given propeller fuel consistently down few hundred changing glow plug doesnt help thats indication internal friction has increased engine probably needs cleaned devarnished See Dave Gierkes book accomplish 4September 1999 47 Two great books model airplane engines should inNew TNC Sensi-Tach has become authors engine-tuning tool modelers library text has detailschoice over old faithful Ace RIC TachMaster II
Edition: Model Aviation - 1999/09
Page Numbers: 46, 47
Edition: Model Aviation - 1999/09
Page Numbers: 46, 47
U Joe Wagner 7TL7zc ux ECENT COLUMN wrote Few reference books devoted model airplane engines available nowadays response statement Dave Gierke mailed copy book 2-Stroke Glow Engines RIC Aircraft truly comprehensive exceptionally well-written thoroughly illustrated work covers considerably territory its title suggests first dozen chapters Daves book cover general theory design development model airplane engines including material early spark-ignition typesand Free Flight Control Line power plants latter half book devoted operational topics cant think significant area Dave has missed five chapters Running Right provide thorough explanation model engine procedure Ive read choosing propeller first break-in runs throttle adjustment flight Dave covers art two-stroke model airplane engine operation minute detail becoming bogged down boring minor technicalities Though theres no previous contact between Dave Gierke recommendations running maintaining glow engines almost identical example topic mixture setting Dave writes mixture should set slightly rich maximum power modelers insist upon leaning mixture attempt squeeze out highest possible engine speed . asking trouble Piston ring damage possible varnish deposits certainty castor oil lubricant used fuel because increased temperatures encountered truth engines can operated noticeably rich still produce power near maximum fear damage Dave recommends breaking new model engines test stand instead airplane minimum 20% oil fuel including some castor cleaning devarnishing procedure thats identical Ive developed over last /3 century own use highly recommend Daves book can buy $1795 postpaid direct Dave Gierke Flying Models Box 83 Bowmansville NY 14026 copy Daves bookplus Eric Cluttons classic Dr Diesels Diarywill tell almost everything youll ever need know about two-stroke model airplane engine operation Longtime engine experimenter Bill Dahlgren Glenview IL dislikes concept model engine customizationlargely because much has done thoughtlessly Bill writes Ive gotten downright annoyed doofs seem compelled such things sawing off O&R exhaust stack name streamlining thereby messing up perfectly good engine no good reason other hand has acquired such butchered engine can feel free some real improving Someone hacksawed exhaust stacks ED246 Racer destroyed cylinder seating area process Some machine work top crankcase turned-up adapter ring restored cylinder seatingand since backplate assembly also disappeared adapter made accept reed-valve hackplate Cox Sportsman 15 Success 46 Model Aviation omization Bill Dahigren butchered ED diesel resulted fine-performing hybrid Authors all-time favorite model engines Ohlsson 23 popular Mills 75 047 Cu diesel Replicas have sparker OK Cub 049 glow Low rpm high fun made seven companies five countries hybrid runs rather better stock ED Racer Ive seen has returned flying status what would otherwise have become landfill Bill Dahlgrens certainly right about model engine butchery engine-collecting days encountered botched attempt customization hope provided some educational experience perpetratorsteaching what future recent remarks column about impossibility answering question Whats best engine 2 brought few responses form related query time can provide some answers Whats favorite model engine Ill have equivocate bit Ive enjoyable experiences model power plants over past six decades Free Flight Control Line Radio Control airplanes example fondly recall Arden 099 19 immediate postwar years beautifully designed made highly reliable runners pioneered development glow plug Yet cant truly place Ardens among favorites because too fragile couldnt stand up punishment day-in day-out sport flying Taking everything about account Ill have vote Ohlsson 23 OK Cub 049 all-time favorite model power plants Ive received flying pleasure fewer pesky problems two engine types others though some have come mighty close level terms worldwide popularity no model engine compares Mills 75an 047 cu British diesel design Introduced 50 years ago little Mills has long gone out production its original manufacturer Yet its persistent popularity has inspired replication Mills 75 over world China India Australia Russia Britain Replica Mills 75 diesels made India original British tooling presently available US Carlson Engine Imports 814 East Marconi Ave Phoenix AZ 85022 proper fuel Mills 75s start run just well today ever antiquish sideport long-stroke design has never surpassed sheer friendliness reliability qualities record-breaking power output what appeal sport type model airplane flierswho have always far outnumbered competition-minded set same qualities what made Ohlsson 23 OK Cub 049 immensely popular day low rpm less 10000 made possible millions youngsters fly engine-powered mufflerless model airplanes schoolyards neighborhood ballfields over America seriously annoying nearby residents Millions active model airplane fliers meant millions engine sales Ohlsson OK enjoyed total sales volume measured seven figures popular engines 23 made 1939 1949 almost four-year-long interruption during WW II Cub 049 market continuously 1949 through mid-1960s direct sales modelers occurring first seven eight years During heyday two model engines sold annual rate 10 times high anything todays model engine market Almost beginning model engine enthusiasts have curious concerned about performance criterion has always rpm Yet few ways accurately measure rpm have readily available modelers Early attempts rpm measurement via vibrating wires inaccurate precision instruments cost far too much hobbyists afford advent inexpensive phototransistors circa 1965 electronic tachometers appeared hobby market analog-type tachometers indicate rpm dial like voltmeter Theyre handy useful toolsbut imprecise require occasional recalibration digital-type tachometers appeared direct readouts first looked like major improvement art model engine rpm measurement Yet devices too weaknesses annoyed lot incessant dithering last two digits readout now Tony Criscimagna TNC Electronics 2 Whites Lane Woodstock NY 12498 has made breakthrough new digital/optical Sensi-Tach uses high-precision crystal oscillator circuit instead earlier less expensive timer chip modules earlier digital/optical tachometers Thus Sensi-Tach never needs calibration its readout panel design displays rpm nearest hundred eliminates confusing digital jitter less-expensive tachs Some modelers seem use tachometers mainly provide bragging data Webra turns up 2200 rpm SuperTigre Bobs OS idles woy lower Enya tach can real help throughout life model engine During break-in accurate tach allows monitor progress procedure can tell youve reached goal Some engines given production batch require much break-in time others After engine well run-in record its normal rpm range made precision tach can act standard compare future performance find example top rpm given propeller fuel consistently down few hundred changing glow plug doesnt help thats indication internal friction has increased engine probably needs cleaned devarnished See Dave Gierkes book accomplish 4September 1999 47 Two great books model airplane engines should inNew TNC Sensi-Tach has become authors engine-tuning tool modelers library text has detailschoice over old faithful Ace RIC TachMaster II
