Model Diesel Engines - Page 27 - RC Groups
Thread Tools
Oct 06, 2009, 10:02 PM
Registered User
earlwb's Avatar
harrisdouma; I have a blue diesel conversion head for a cox .049 It was made by a company
in California. The black rubber o-ring is missing.. But I think could be picked
up from plumber.
Does anyone know the name of the company that made this. If anyone is
interested I would part with this conversion head
Davis Diesel Development makes the diesel heads. You can get parts from them. But for the O-ring a good auto parts store probably could match it up OK.
Sign up now
to remove ads between posts
Oct 07, 2009, 12:02 AM
Registered User
A blue cox diesel head with an o'ring is more likely to be an RJL head
Oct 07, 2009, 01:00 AM
Registered User
TLyttle's Avatar
Old TR engines never die, they just become ideal sport engines! Even a "retired" TR engine will really haul the mail for the average stunter. I built a biplane from a magazine plan years ago, supposed to have a 35 in it: I reduced the weight (typical c/l design), put my ETA in it, flew it on 52' lines, and it just sparkled. Another guy showed up at the field, model built per plan, 35 duly installed. After seeing mine fly, he told me he was going to take his model home and stomp on it.....
Oct 07, 2009, 05:49 PM
Registered User
harrisdouma , Need parts for the Cox .049 with diesel head, try the
updated website at
A regular black rubber o ring may not last very long at temperature.

faif2d, how about a few pictures of your nib version? Got any paper work with it?

TLyttle , I flew my ETA .15D (9x4 prop) in a junior Ring Master, U/C, then switched to a McCoy .19 rear rotary valve, side exhaust, ringed, class A racing engine from the 1950’s. Even though it had a third more displacement, the little Ring Master didn’t seem to have any more power or fly differently. On a slightly larger plane an ED 3.5 (0.21) diesel still fell way behind a McCoy .35. Neither was what I would call a “ball of fire”, but they both were steady runners….nice to keep the lines out and tight.
Oct 07, 2009, 10:14 PM
Registered User
TLyttle's Avatar
I believe that the ED was kinda slow alright. My 2.46s were easy to start, ran reliably at any speed, but the limited RPM meant that coarse pitch props were the order of the day, 8-8s the norm. That engine's T/R days were long gone; couldn't say the same for the ETAs and MVVSs as sport engines. My ST 15D was unhappy on anything other than a 8-8 or 9-6. Torque!! that's what diesels do.
Oct 08, 2009, 04:08 PM
Registered User
faif2d's Avatar
Photo is not the best. 3 different ventures and tubing + mounting bolts included.
Oct 08, 2009, 09:12 PM
Registered User
faif2d , thanks for the picture. Picture is fine. How about a top , front, rear, side view, and the paper work showing the inside parts? What's the box look like, has it a picture?
Oct 09, 2009, 07:56 PM
Registered User
faif2d's Avatar
The box is in the photo. The bottom that the engine sets on, black plastic, and to the rear a clear plastic pop on cover. I did not put the top in a more forward position as the top has been cracked and is now held together with scotch tape. The other thread had good photos, probably better than the ones my cheap camera will take. There is a small cross sectional view in the instructions but it is small and I would not be able to take a clear enough photo to do any good. This one was made in 1988.
Oct 10, 2009, 01:59 PM
Registered User

Get your model diesel airplane engine now

Thanks faif2d .
Perhaps someone else has this engine?
If not, I'll try and get a few more pictures and info.
What are you using for diesel fuel?

To anyone thinking of getting started in "a collection", now might be a good time. It's getting harder to find small engines ( 1, 1.5, 2 cc, etc.), especially diesels.

Having said that, I wanted a new MVVS 2.5 D (.15) R/C. I couldn't find one here in North America, but I did get the engine from the MVVS factory. Talk about service, less than a week to my door. Pictures to come later.
Oct 10, 2009, 05:35 PM
Registered User
Gluehand's Avatar
Here are some photos of my KMD 2.5 cc (note, what appears as an "A", is a "D" in the cyrillic alphabet).
I have never used this engine, as I have yet to find a way of fitting a silencer without causing damage....I'd like to be able to restore its original look.... However, it appears to be a quality engine, let go a little chunky. With its rear drum induction, I am sure that it will throttle well.
All in all, a convincing twin BB engine, that I hopefully will find some use for, eventually...

The second one, the Super Tigre G15RV, I have used quite a bit....last model was my own, somewhat improvised design, a low wing "cropduster lookalike", about 57" span. Most frequently used prop: 10x4. It starts very easy. When flying, the nice original spinner was replaced with an ordinary prop driver assembly (the "standard" G20/15 prop driver fits)
Last edited by Gluehand; Oct 10, 2009 at 06:10 PM.
Oct 10, 2009, 06:26 PM
Registered User
The MD translates roughly to Model Engine (модельный двигатель) with the stylized д actually being, as gluehand noted, the Cyrillic letter doh, equivalent to the English D.

Oct 10, 2009, 08:11 PM
Registered User

KMD 2.5 and ST diesels, nice pictures

Gluehand, thanks for the pictures, nicely presented. I rather like your choice of background, nice. The KMD 2.5 uses slotted screws. The casting looks strong and robust. Is the black an anodizing, or more likely a powder coat? It looks good. Irving was using a red coating. The “insides” appear to show a flat plate or washer on top of the contra piston? Can you get enough hand torque to change the compression, or is that the “tool” used shown in the picture? It’s difficult to see whether it has a drum or rear rotor inside. All in all, a very nice looking engine. The ST looks great too. Unfortunately I only have the glow with the front intake. Both have nice spinners.

Thanks for the info Andrew820, but is it [KMA is really KMD] KM or MD that translates to… MD translates roughly to Model Engine (модельный двигатель) ?
Oct 10, 2009, 09:11 PM
Registered User
Originally Posted by JohnAV8R
<snip> ...... but is it [KMA is really KMD] KM or MD that translates to… MD translates roughly to Model Engine (модельный двигатель) ?

John --

The MD portion (МД) translates to Modelling Engine. I expect the K represents either manufacturer or engine type, but will have to rely on Gluehand for it's translation. Similar Cyrillic characters also appeared on the early model NORVELs (АМД) and were often mistaken for a mis-shaped A or Greek letter delta.

Oct 10, 2009, 09:42 PM
Registered User
JMP_blackfoot's Avatar
Originally Posted by Andrew0820
The MD translates roughly to Model Engine (модельный двигатель) with the stylized д actually being, as gluehand noted, the Cyrillic letter doh, equivalent to the English D.

Both the instruction manual and the guarantee card read (in our alphabet) :
"Mikrodvigatel", which means "Micro-engine".
That would be the MD part of KMD.
Oct 10, 2009, 11:42 PM
Dieselized User
gkamysz's Avatar
Where are the Pfeffer square heads? I have one, but have never run it.

I have a few of the MDS 1.5CC diesels. I managed to get a few seconds of run out of one after breaking a wrist pin and reworking the head so it didn't leak. It needed an exhaust on it in order to run at all. I haven't messed with it in a few years.

I saw the youtube link to my TT F-75S diesel conversion. I just posted another clip of an FS-48 diesel. I hope to post a few more this month.


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
diesel engines wyflyer_55 Fuel Plane Talk 18 Jul 15, 2017 02:14 PM
Diesel Engines Aeromister Engines 18 Apr 20, 2017 12:25 AM
scale model of engines dw1122 Life, The Universe, and Politics 4 Apr 11, 2016 11:39 AM
Discussion Need help with two diesel engines ! cosmin Engines 4 Apr 18, 2014 08:18 PM
WTB-Model Diesel Fuel slogo Aircraft - Fuel - Airplanes (FS/W) 3 Nov 13, 2004 10:42 PM