Cox .010 Tee Dee Engine

Does anyone know if the Cox .010 Tee Dee Engine can be run without a prop?

-Jake

Reply to
J. R.
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As in a car or boat?

Reply to
Don Hatten

Reply to
Bill Fulmer

Needs a flywheel at least.

Reply to
The Natural Philosopher

Reply to
Paul McIntosh

So, as a devout .010 fan I'm just a tad curious - what are you doing with it? Glow powered tools for small animal field dentistry? Table top tether cars? Miniature generators?

Seriously, any motor can be run without a prop if it has a suitable load to keep rpm within reason, some mass for rotational momentum, plus sufficient cooling. Some ingenuity will certainly be necessary for a tiny motor that thrives on rpm like the .010!

Mike D.

Reply to
M Dennett

You hit it right on the head... I am interested in coupling a Tee Dee with a tiny 3-phase generator. Just an experiment I have wanted to try for a while.

Just out of curiosity, could it run on straight pump diesel? Would it have sufficient lubrication?

-Jake

Reply to
J. R.

No, it won't run on pump diesel at all actually. Though a model two stroke glow engine operates similarly to a diesel, it runs at a lower compression ratio and ignition is caused primarily by catalytic action of the glow plug element on methanol. Glow plugs on diesel engines are a different puppy. Though I've heard that larger glow engines (with glow plugs, not converted), may run to a fashion with model diesel fuel (see below) the .010 is pretty fuel sensitive - it needs gobs of nitromethane to maintain sufficient cylinder heat to maintain smooth running, or running at all. I really doubt it will even run on model diesel fuel, maybe with the plug lit but I do not honestly know. I suspect not since I have owned many of them starting somewhere around 1969, and am aware of their sensitivity to fuels. I love the motor by the way, treat them right with a proper touch and they run like a bear. Well, maybe a mosquito on steroids..

If you are interested in the concept of diesel operation, then the next smallest candidate that would (or might..) work would be a Cox .020 with Davis Diesel conversion head. Or a small British diesel, but the dieselized .020's apparently work quite well. However, you still have to run it on dedicated model diesel fuel blends, which contain oil, kerosene, and ether. Without the ether they won't sustain running. Additional oil is necessary because there is insuffucient lubricity in diesel fuels alone, and even when it is blended in the mix as for a two stroke model diesel due to the low amount of fuel per stroke (high air:fuel ratio) a fair percentage is required.

Next you'll be wanting a micro turbine for one of these whatevers you're building... ;-)

Mike D.

Reply to
M Dennett

On Mon, 26 Jan 2004, J. R. wrote

Is this chap real .... ?????

Reply to
noone

No. It needs methanol to keep the plug hot, nitromethane to compenstae for rotten carb design, and lots of castor oil or synthetic equivalent to cover the area around in slime.

Assuming you are't trrolling... :-)

Reply to
The Natural Philosopher

Believe me, I'd love a micro turbine for my project, but they are well out of my budget. Thanks for your input on running the Tee Dee on pump diesel. It's just as well that it won't.

-Jake

Reply to
J. R.

Do a google serach on PAW or progres aero works. They have some very small diesels still in production.

From memory its kerosene, ether, amyl nitate and castor oil to feed those.

Reply to
The Natural Philosopher

Tee Dee .010s are, in my experience, sweet running little engines and are surprisingly trouble free. I'd like to see plans for the generator- Are you planning to use a brushless motor as a starting point, or is this not the way? Paul

J. R. wrote:

Reply to
Paul Ryan

You will void the warrantee by exceeding 50Krpm.

Reply to
gary

Not to mention voiding the warranty on your hearing aid.

Mike

Reply to
Mike

A brushless motor is the starting point. At this point I think I am most interested in the smallest engine that can run on straight pump diesel. Does anyone know of a mfgr?

-Jake

Reply to
J. R.

Reply to
Paul Ryan

I would say you would be into the small agricultural engine there, or a small boat motor. Probably something of the order of 2-500cc, and weighing about 50kg.

The amount of bits you need to put on a true oil burner, as opposed to a model

one running with oil and ether added to the kerosene,

makes for a heavy and expensive engine.

The injection system alone would be highly complex.

However PAW make a .03cc diesel that runs on model diesel fuel. Essentially mostly kerosene and lubricant, and some ether to improve starting.

Reply to
The Natural Philosopher

Well that's easy, it can't produce more power than what you put into it so at best about as much as a bumble bee :)

Reply to
Brian

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