Model Diesel Engines - Page 127 - RC Groups
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Mar 31, 2011, 08:28 PM
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Yes, Post #1882, Retro "15", or 2.5 cc from Luxemburg, early 1970's; shown on page 167 of Mike Clanford's Model Engines. Just got the book in the mail. Lots of pictures, all B&W, but few words and no engine specs. Will post when things get slow.
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Mar 31, 2011, 09:07 PM
Thermals, Tom
RyanNX211's Avatar
The PAL Imp prototype on the test stand.

A twin is also under consideration. Stay tuned
Mar 31, 2011, 09:18 PM
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Who was it that flew the first fixed compression , ether fueled diesels , this was before WW2 I suppose , was it the French ?, it wasnt the US

Was probably Free flight first before Controline
Mar 31, 2011, 09:46 PM
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I think it was the French right after WWII. They might have developed a fixed compression diesel during the war when they were being occupied though. I remember seeing some pics of model diesel engines from France made during the occupation, but these appeared to be one off's at the time.

here in the USA the Drone .29, Mite .099, and I think another company had fixed compression engines at least until the glow engines took over.

Yes free flight was before control line. It came into vogue with the glow engines. The problem with control line was the spark ignition engines were too unreliable to run for so long in a control line plane. The batteries were heavy and didn't last very long, as well as the engines would overheat. But with free flight the engines seldom ran for more than 45 seconds or a minute at the most. So it would work there OK.

Diesel came about and was hugely popular for a while with control line (and free flight too) as you didn't have a coil or heavy battery to deal with. But with the advent of the glow plug, at least here in the USA, the glow engine quickly supplanted the diesels and spark ignition engines.

Now tether line cars and boats were around before WWII and were quite popular too.
Last edited by earlwb; Mar 31, 2011 at 09:52 PM.
Mar 31, 2011, 11:15 PM
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gkamysz's Avatar
Apr 01, 2011, 01:58 AM
Voices through wires? Ha!
Chas's Avatar
ha ha "E Tha" - after he got fired by Ben Zeene, got mixed up with Walt Thurr and Pietr Oihl and burnt out - eventually, exhausted, settled near Fin Land.
I hear he got wiped after the Crash and spent some time with J Kloth.
Last edited by Chas; Apr 01, 2011 at 02:24 PM. Reason: Sobered up.
Apr 01, 2011, 07:15 PM
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If you are even remotely interested in AMCO 3.5's, read Adrian Duncan's latest masterpiece at -
Apr 01, 2011, 07:27 PM
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From Model Hobbies (Aussie magazine) Spring issue 1952. Did anyone ever own an E.D. Challenger ?
Apr 01, 2011, 08:29 PM
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Interesting that a .19 sticker was placed upon the box when it's actually a .21 .....
Apr 01, 2011, 10:09 PM
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earlwb's Avatar
hey thanks for clearing up where the diesel engines first came from.
Well, I was close though, France is right next door to Switzerland.
Apr 01, 2011, 10:30 PM
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Amco 3.5

The 1950's through the 1960's were the years for the diesels.
This is the finish on these engines, not a highly polished version.
It's what's on the inside that counts.
Apr 01, 2011, 10:40 PM
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1954 Webra Rekord 1.5cc diesel bolted up to a Freeflight model.
Apr 01, 2011, 11:12 PM
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earlwb's Avatar
This one is really neat, a Webra 7.7cc twin diesel a Webra Ruppert. This is all I found on it was this video clip.

Modelldiesel Webra Ruppert (0 min 8 sec)
Apr 02, 2011, 12:13 AM
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TLyttle's Avatar
It's okay, Chas, I'm getting a laugh out of that one...

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