REPEATEDLY over last few weeks Ive begun compose report question objectivity light overwhelming enthusiasm Can Davis Diesel conversion heads actually alter characteristics glow motor extent testing indicates conver sions represent valid improvement power torque economy utility am allowing fondness diesel powerplants cloud judgement Admittedly am certainly engine expert possess equipment accurately measure performance nor have ever very interested modifying engines final analysis important measurement powerplant its performance flying model exactly astonishing performance change comes Davis head answers decidedly positive Original Buccaneer photo spans 84 has chord 14 weighs nearly 7 pounds will take off short grass less 10 feet will gain altitude 60% throttle cruise 40% Semco muffler barely audible 100 yards away powerplant turning 1 3X6 Rev-up prop 10000 rpm idling 1800 mea sured Heath-kit tach Now incred ible number Bucc powered usual 60 glow engine ST 35 Stunt! Unbelievable say Davis head engine nearly always starts choke flip two have yet resort electric starterhand-proping pleasure Fuel consumption approaching 2 minutes per ounce learn set leanest possible mixture Considering current cost plugs batteries well projected rumored higher price nitro fuel can quickly amor tize price conversion head Additional benefits diesel No need fuel-proofing simplified flight-line equipment plane trans mitter thats sound highly reminis cent old spark-ignition motors As confirmed non-motor tinkerer found changing heads extremely easy Care must exercised transferring gasket compression preset factory greatly simplifies first start compression ratio varied supplied Allen wrench used turn head screw quickly learned tie red ribbon invariably tossed onto ground after use hard locate carb straight Supertigre adjusted slightly lean after break-in volume fuel consumed appre ciably less Speed range transitions just good glow version perhaps better slug fuel will extinguish plug neatly dumped out exhaust puff smoke like impress spectators gunning diesel fashion drag racers negative aspect exciting engine modification need neoprene fuel handling systems including tubing inside clunk tank fuel will destroy vinyl surgical tubing matter minutes Also watch fuel pump Incidentally fuel commercial item although engine will run several brands fuel Ive done it recommended Davis own blend used protect thermal seals able buy Davis fuel favorite local hobby shop Someone recently printed objection odor diesel fuel Seems entirely relative dont like smell glow fuel Ive gotten used sometimes forget dislike Diesels smelly merely different smelling Bob Davis currently producing conversion heads accessories Cox line Fox 15 Schnuerle K&B 35 cc ST 35 OS 40 FSR 0S60 FSR will note engines have non-baffled piston present time Bob hard work several additional conversions Send 25 large SA SE Davis Diesel Development P0 Box 141 Milford CT 06460 latest information see 35 powerplant pull monstrous model around just much ease ST 56 glow surely incredible sights Ive witnessed nearly 35 years modeling sight sound highly reminiscent first successful gas model Buccaneer C Special O&R 60 What lovely blend model power would have ever guessed Bob Davis salute youve added new dimen sion pleasure wonderful hobby Although rare US diesel motor has Continued page 118 Lett UaViS-LJIeseI flead i Jbin uocsSu per Buccaneer84 7 lbsturns 13-6 10000 rpm Climbs 60% throttle cruises 40% Takes off 10 ft Above ancient Berkeley bird old-timers remember December 1979 31 Part Docs Diesel collection L R DC Spitfire 1 cc 06 ME Herron 15cc 09 Mills 13cc 078 Mills 75cc 045 Mills Mk 113cc resembles Dyno OUR AIM IS TO KEEP SPORT FLYING SPECIALIZING IN OT FF KITS AND ENGINES FOR THE COMPETITOR WE HAVE THE HOT EQUIPMENT NUSTJIiS6S 4 PLANES 1S Enb Rind BOATS PO Sex 227 CARS Panules Cmitw ThAINS Vms Wuit OIl 48396 Joe Onylma 141J 233-26 WE BUY OR TRADE OLD ENGINES AND KITS seasoned pilot like Lloyd Wheeler can happen lesser pilot much faster machines like other machines can very dangerous treated care respect times few things remember 1 Disregard instructions grab tail boom trim out check rotor blade tracking 2 Have someone around help possible Most things go wrong during first run upout cone pitch bent main shaft etc 3 Carry blanket have ready throw over Helicopter smother whirling blades will stop blades whole lot damage chopper anyone else blades break can fly also 4 Always check loose worn parts replace tighten needed Chopper parts easier replace human parts 5 Make sure battery pack cannot discon nect receiver Remember machines can give much joy fun used safety mind times will eat face carefuL RC Clubs Ludington MI praised compassion aid Wheelers hour need some mighty nice planes too anyone has ideas about birds write Ray Hanchett 1647 Lake Lansing Road Haslett MI 48840 phone 517 3398437 Mr Chesney hope can publish have heard few other accidents same nature Ray Hanchett OK anyone out want tackle com plete set safety rules specifically RC Helicopters Well publish list column after review RC Helicopter Advisory Committee other interested parties Speaking interested parties Richard Gielow Jr president Rantoul Chanute RC Club trying organize Midwestern Helicopter Association District VI Illinois Indiana Kentucky Missouri believes eventually gathering state/district organizations could replace old National RC Helicopter Association youre interested drop Richard line 1536 Apollo Drive Rantoul IL 61866 way drop line name Helicopter group contact name address can direct some aspiring RC Helicopter fliers way youre ham listen KA4K1G Id love talk Helicopters Well thats month Now catch up some letter writing Fly safely Dave Chesney Rt 9 Box 621A Greensboro NC 27409 RC Old Timers/Mathews continued page 31 highly popular Europe since 1945 typical European sport model UC FF RC powered small diesel of5 cc 25 cc reasons diesels continued popu larity Europe diverse certainly frugality foremost Nitromethane glow fuel horrendously expensive Europe illegal several countries whereas paraffin ethers other components diesel fuel relatively inexpensive simple starting long life diesel have also contributed longterm popularity Continent truth current rumors whirling about con cerning availability price nitro platinum side Atlantic diesels may well stage rapid burst acceptance well Interestingiy small powerplants actually diesel engines absolutely accu rate Compression Ignition Engines true diesel compresses air injects fuel highly complex injection techniques therefore four-cycle miniature CIE engine first commercially produced Klemenz-Schenk group Switzerland 1943 204 cc Dymo looks much like Mills 13 MK Strangely success Swiss development came about borrowing British patent 1920s variable com pression-ratio head utilizing contra-piston Several US manufacturers joined diesel market immediate post WW II era among OK McCoy produced numer ous successful engines 049 09 sizes Vivell Edco Madewell gave tentative tention market segment did enter full production diesel conversion head available Arden powerplants Leon Shulman marketed 5cc Drone original Drone did have variable compression head condition made hand-starting small prop experience particularly cold humid day Drone used great success several u/c stunt fliers such Bob Tucker won Nationals 1948 Fran McElwee powered Mirror Fair winning RC Drone 1948 others Later Drones featured variable compression heads late history line giow-powered version introduced Drones demise related gaining popularity glow motor aforementioned starting problems Although numerous manufacturers have pro duced small displacement diesels years Davis-Design conversions first large-bore diesels produced commercially decade English brands such Davis Charleton PAW Oliver Tiger Moore En gineering ED have imported US Hobby Hideaway others years Some first Webra Super tigre imported motors diesels French Micron Hungarian Moki MVVS also indicate worldwide popularity CIE powerplant Japanese Enya Works have included 1-cc diesel line introduction Davis conversion heads large-size powerplants likely will once again broaden interest CIE engines since now available 32-cc Cox 020 through 10-cc 0S60 have opportunity operate 10-cc unit writing can speculate raw power must available feeling would such powerplant-prop combination should likely hold its own 12-cc chainsaw conversions currently use Just con sider such thing king-sized old-timer like mentioned last column Space does permit comprehensive out line hints operating CIE excellent article subject appeared Flying Models Dec 1978 recommended will give three cardinal rules 1 Start up dry head choked throat 2 never run overcompressed state 3 always use larger prop equivalent glow engine three rules will prevent difficult starting excessive wear breakage exploit strong point CIE power rather rpm ideal prop 75 cc 049 8X3 13 cc quite happy 9X5 6 cc churns 1 3X6 aplomb Dee B Mathewz 506 S Walnut Greensburg KS 67054 118 Model Aviation JET RANGER 5 ALLOUETE 295 Bobco COMMANDER $895 Products $495 REVOLUTION-i.$495 BOBCO parts factory ROTOR SHAFTS parts replacement parts 40 size -- $495 manufactured 8OBCO60 size $995 Call Write Complete FAN SHROUD Information Entire Line 40 60 size - $795 DEALER PROGRAMS ENCOURAGED10% Discounton 5 Sets CA residents add 6% sales tax C-IS Santa Fe Avenue add $150 postage & handlingUUEkTI1 Vista CA 920a3 send check money order toTel 714 727-4130
Edition: Model Aviation - 1979/12
Page Numbers: 31, 118
REPEATEDLY over last few weeks Ive begun compose report question objectivity light overwhelming enthusiasm Can Davis Diesel conversion heads actually alter characteristics glow motor extent testing indicates conver sions represent valid improvement power torque economy utility am allowing fondness diesel powerplants cloud judgement Admittedly am certainly engine expert possess equipment accurately measure performance nor have ever very interested modifying engines final analysis important measurement powerplant its performance flying model exactly astonishing performance change comes Davis head answers decidedly positive Original Buccaneer photo spans 84 has chord 14 weighs nearly 7 pounds will take off short grass less 10 feet will gain altitude 60% throttle cruise 40% Semco muffler barely audible 100 yards away powerplant turning 1 3X6 Rev-up prop 10000 rpm idling 1800 mea sured Heath-kit tach Now incred ible number Bucc powered usual 60 glow engine ST 35 Stunt! Unbelievable say Davis head engine nearly always starts choke flip two have yet resort electric starterhand-proping pleasure Fuel consumption approaching 2 minutes per ounce learn set leanest possible mixture Considering current cost plugs batteries well projected rumored higher price nitro fuel can quickly amor tize price conversion head Additional benefits diesel No need fuel-proofing simplified flight-line equipment plane trans mitter thats sound highly reminis cent old spark-ignition motors As confirmed non-motor tinkerer found changing heads extremely easy Care must exercised transferring gasket compression preset factory greatly simplifies first start compression ratio varied supplied Allen wrench used turn head screw quickly learned tie red ribbon invariably tossed onto ground after use hard locate carb straight Supertigre adjusted slightly lean after break-in volume fuel consumed appre ciably less Speed range transitions just good glow version perhaps better slug fuel will extinguish plug neatly dumped out exhaust puff smoke like impress spectators gunning diesel fashion drag racers negative aspect exciting engine modification need neoprene fuel handling systems including tubing inside clunk tank fuel will destroy vinyl surgical tubing matter minutes Also watch fuel pump Incidentally fuel commercial item although engine will run several brands fuel Ive done it recommended Davis own blend used protect thermal seals able buy Davis fuel favorite local hobby shop Someone recently printed objection odor diesel fuel Seems entirely relative dont like smell glow fuel Ive gotten used sometimes forget dislike Diesels smelly merely different smelling Bob Davis currently producing conversion heads accessories Cox line Fox 15 Schnuerle K&B 35 cc ST 35 OS 40 FSR 0S60 FSR will note engines have non-baffled piston present time Bob hard work several additional conversions Send 25 large SA SE Davis Diesel Development P0 Box 141 Milford CT 06460 latest information see 35 powerplant pull monstrous model around just much ease ST 56 glow surely incredible sights Ive witnessed nearly 35 years modeling sight sound highly reminiscent first successful gas model Buccaneer C Special O&R 60 What lovely blend model power would have ever guessed Bob Davis salute youve added new dimen sion pleasure wonderful hobby Although rare US diesel motor has Continued page 118 Lett UaViS-LJIeseI flead i Jbin uocsSu per Buccaneer84 7 lbsturns 13-6 10000 rpm Climbs 60% throttle cruises 40% Takes off 10 ft Above ancient Berkeley bird old-timers remember December 1979 31 Part Docs Diesel collection L R DC Spitfire 1 cc 06 ME Herron 15cc 09 Mills 13cc 078 Mills 75cc 045 Mills Mk 113cc resembles Dyno OUR AIM IS TO KEEP SPORT FLYING SPECIALIZING IN OT FF KITS AND ENGINES FOR THE COMPETITOR WE HAVE THE HOT EQUIPMENT NUSTJIiS6S 4 PLANES 1S Enb Rind BOATS PO Sex 227 CARS Panules Cmitw ThAINS Vms Wuit OIl 48396 Joe Onylma 141J 233-26 WE BUY OR TRADE OLD ENGINES AND KITS seasoned pilot like Lloyd Wheeler can happen lesser pilot much faster machines like other machines can very dangerous treated care respect times few things remember 1 Disregard instructions grab tail boom trim out check rotor blade tracking 2 Have someone around help possible Most things go wrong during first run upout cone pitch bent main shaft etc 3 Carry blanket have ready throw over Helicopter smother whirling blades will stop blades whole lot damage chopper anyone else blades break can fly also 4 Always check loose worn parts replace tighten needed Chopper parts easier replace human parts 5 Make sure battery pack cannot discon nect receiver Remember machines can give much joy fun used safety mind times will eat face carefuL RC Clubs Ludington MI praised compassion aid Wheelers hour need some mighty nice planes too anyone has ideas about birds write Ray Hanchett 1647 Lake Lansing Road Haslett MI 48840 phone 517 3398437 Mr Chesney hope can publish have heard few other accidents same nature Ray Hanchett OK anyone out want tackle com plete set safety rules specifically RC Helicopters Well publish list column after review RC Helicopter Advisory Committee other interested parties Speaking interested parties Richard Gielow Jr president Rantoul Chanute RC Club trying organize Midwestern Helicopter Association District VI Illinois Indiana Kentucky Missouri believes eventually gathering state/district organizations could replace old National RC Helicopter Association youre interested drop Richard line 1536 Apollo Drive Rantoul IL 61866 way drop line name Helicopter group contact name address can direct some aspiring RC Helicopter fliers way youre ham listen KA4K1G Id love talk Helicopters Well thats month Now catch up some letter writing Fly safely Dave Chesney Rt 9 Box 621A Greensboro NC 27409 RC Old Timers/Mathews continued page 31 highly popular Europe since 1945 typical European sport model UC FF RC powered small diesel of5 cc 25 cc reasons diesels continued popu larity Europe diverse certainly frugality foremost Nitromethane glow fuel horrendously expensive Europe illegal several countries whereas paraffin ethers other components diesel fuel relatively inexpensive simple starting long life diesel have also contributed longterm popularity Continent truth current rumors whirling about con cerning availability price nitro platinum side Atlantic diesels may well stage rapid burst acceptance well Interestingiy small powerplants actually diesel engines absolutely accu rate Compression Ignition Engines true diesel compresses air injects fuel highly complex injection techniques therefore four-cycle miniature CIE engine first commercially produced Klemenz-Schenk group Switzerland 1943 204 cc Dymo looks much like Mills 13 MK Strangely success Swiss development came about borrowing British patent 1920s variable com pression-ratio head utilizing contra-piston Several US manufacturers joined diesel market immediate post WW II era among OK McCoy produced numer ous successful engines 049 09 sizes Vivell Edco Madewell gave tentative tention market segment did enter full production diesel conversion head available Arden powerplants Leon Shulman marketed 5cc Drone original Drone did have variable compression head condition made hand-starting small prop experience particularly cold humid day Drone used great success several u/c stunt fliers such Bob Tucker won Nationals 1948 Fran McElwee powered Mirror Fair winning RC Drone 1948 others Later Drones featured variable compression heads late history line giow-powered version introduced Drones demise related gaining popularity glow motor aforementioned starting problems Although numerous manufacturers have pro duced small displacement diesels years Davis-Design conversions first large-bore diesels produced commercially decade English brands such Davis Charleton PAW Oliver Tiger Moore En gineering ED have imported US Hobby Hideaway others years Some first Webra Super tigre imported motors diesels French Micron Hungarian Moki MVVS also indicate worldwide popularity CIE powerplant Japanese Enya Works have included 1-cc diesel line introduction Davis conversion heads large-size powerplants likely will once again broaden interest CIE engines since now available 32-cc Cox 020 through 10-cc 0S60 have opportunity operate 10-cc unit writing can speculate raw power must available feeling would such powerplant-prop combination should likely hold its own 12-cc chainsaw conversions currently use Just con sider such thing king-sized old-timer like mentioned last column Space does permit comprehensive out line hints operating CIE excellent article subject appeared Flying Models Dec 1978 recommended will give three cardinal rules 1 Start up dry head choked throat 2 never run overcompressed state 3 always use larger prop equivalent glow engine three rules will prevent difficult starting excessive wear breakage exploit strong point CIE power rather rpm ideal prop 75 cc 049 8X3 13 cc quite happy 9X5 6 cc churns 1 3X6 aplomb Dee B Mathewz 506 S Walnut Greensburg KS 67054 118 Model Aviation JET RANGER 5 ALLOUETE 295 Bobco COMMANDER $895 Products $495 REVOLUTION-i.$495 BOBCO parts factory ROTOR SHAFTS parts replacement parts 40 size -- $495 manufactured 8OBCO60 size $995 Call Write Complete FAN SHROUD Information Entire Line 40 60 size - $795 DEALER PROGRAMS ENCOURAGED10% Discounton 5 Sets CA residents add 6% sales tax C-IS Santa Fe Avenue add $150 postage & handlingUUEkTI1 Vista CA 920a3 send check money order toTel 714 727-4130