Let's see,

the needle valve is to ajsut how much fuel enteres the carburettor. Screwing it in make it lean, screwing it out makes it rich (first run engines should be on the 'rich side'). If it's too rich, or too lean, the engine won't run, at least not for very long. This should be a part of teh engine (already installed) and you'l probably need to open it up about 2 turns, maybe 2.5 turns. the oppicite side is the throttle arm, wich open or closes the carburettor.

Having popped onto the thunder tiger website, it looks as though the needle mght be an extra, in case you break it or something, I would re-read teh liturature that came with the engine..

Unless someone else has an opinion?!?!?

What is your method for startign the engine? I'm sure the product liturature should say something..



It's a 2 stroke engine.

As you turn the prop the piston goes up and down. As teh piston goes up, you'll be compressing the volume of air in the cylinder. Like a deisel engine, you're gonna get quite a bit of compression, that will make it hard to turn. And it'll pop over one you reach 'top dead center' [TDC] when the compressed air can finally expand to it's original volume and pressure. If you remove teh muffler, you should see the piston go up and down through the exhaust ports. Alternatevly, if you remove teh glow plug, you'll seee the same thing, and you also notice that it's really easy to turn!!

Sounds like you have a setting on your radio for a helicopter mixing setting. assuming your rudder 'deflects' to one side the more you increase teh throttle. You'll need to make sure it's set right - for planes. Your radio might have a 'mix control' knob. turn it to 0. Or you might have a setting in which they are coupled - throttle and rudder. And make sure the servos are plugged into the right sockets.

Or, you're wiggling the stick as you move teh throttle up and down!!

When a helicopter's throttle is increase, the main rotor spins faster, inducing more 'axial' spin. The tail rotor will compensate for this by increasing the pitch (bite) the tail rotor has, to counter the additional spin forces induced by the faster spinning main rotor.


Hope that helps.

If you could detail a bit more your problems, we shoudl be able to help you out..