What type of fuel do I need to run in a TD049?Will it run on 10%x28% f/Fox?
TD 049
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LAST EDITED ON Jun-26-02 AT 04:38 PM (CST)
It will run on Fox Superfuel but it is far from the optimum choice. I would prefer something with a least 15% nitro as these little engines thrive on it. I'm currently runnng my old TD on Fox Missle Mist and it does O K. I think it's 20% nitro, maybe a bit more. Whatever fuel you use it needs to have some castor oil because the ball and socket joint on the TD piston needs it for adequate lubrication. Pure synthetic lubricant won't do the trick. At least that's what I've been told.
Mine run well on Sig 25% nitro, 50-50 Klotz/castor oil once broken in. Come to think of it, I use the same for break in. Used to use Cox Red Can which was about the same specs.
Actually, red can fuel was:
30% Nitro
18% Castor Oil
52% Methanol
Larry Renger
think S.M.A.L.L.
For all the years I flew gas free flight I used Missle Mist in my TD engines. I believe it was 25% nitro and the TD's love it. They can handle up to 40%, but keep an eye on the piston/rod connection.
I forgot to mention that one way to get more performance out of a TD .049/.051 was to remove the cylinder and place it on a 400 grit oiled sandpaper with the sandpaper on a hard surface such as glass. Rub the bottom of the cylinder in a large figure "8" pattern. Clean it up and try it in the crankcase until the inlet ports are perpendicular to the fore and aft line of the engine. In other words, the inlet ports in the cylinder are equal distance from the venturi. This gives a straight through flow of air for the exhaust and the fuel is delivered equally at each inlet port to the top of the cylinder. I learned this little trick from Al Culver in the 70's and gained much needed rpms and this was legal under our "Mouse Race" rules. Actually it was 1/2A Good Year racing, with profiles of famous racing planes, ie: Buster, Shoestring, P39, Mustangs, Corsairs, Rivets, etc. A great hop up for better performance and no stress on the engine. Seldom did an engine come this way, and when it did, it usually out performed all others.