toxic motor break in questions on a spectra

[traderdave2]

How many tanks or gallons do I need run before I don't have to let the motor sit for 45 minutes? I have about 1/2 gallon through it right now.

Can I run two gallons of the lawn boy oil instead of one like the TRM instructions say? Will there be any ill effects or running more than a gallon. Is there any advantage?

Should I have the tail kicking while I am breaking the helicopter in on the lawnboy oil? Or should I adjust it to where it just stops kicking? Right now its kicking in a hover.

Also, how many gallons or tanks do I need to run before I can raise the headspeed. I am hovering just above the speed where the helicopter wobbles. (with stiff head damping)

My TRM says to increase the load after a few flights. Can I do some slow(none full throttle) climb outs and then auto. Or maybe some slow to medium forward flight? Right now I am just hovering around to baby the engine.

Should the screw that adjust the full stop poistion be used. My helicopter idles ok, but the screw is't even needed. Does this mean my low end is too rich or lean. I have the needles very rich right now. I am only getting about 11-12 minutes of just hovering around.

The TRM instructions say to richen the needels as the motor breaks in? Is this correct. THe MA instructions say the opposite. Who is right.

Anyone know where to get a velocity stack?

Thanks
Harlan

[bigrcr]

Harlan,

Letting the motor sit for 45 minutes heat cycles it. If you fly again immediately while it is in it's initial break-in, the motor may be subjected to abnormal wear since the motor makes a great deal more heat while breaking in. The motor makes even more heat as it first sits after flight as well. After the first 1/2 gallon, the motor should be broken in enough to not have to do this but it is still a good idea to do. You will also notice the motor making more power and the RPM coming up on each subsequent flight as well. When this stops being so evident is also a good indicator that the motor is getting there.

Yes, you can run all of the Lawn-Boy oil you want at the right mix ratio. The reason to run the Lawn-Boy is that it supplies very adequate lubrication yet allows some initial wear to happen. With this being said, the boaters call Lawn-Boy "liquid sandpaper" so I personally would not run it forever over the fully synthetic lubrication. If you start out with a fully synthetic lube, the motor can take a very long time to seat-in in it's initial stages of break-in. In some rare cases, this can lead to motor damage itself.

The tail kicking is quite normal and will happen for the duration of break-in. This is happening because of the needle settings being rich, the motor going through different heat signatures and general break-in attributes.The needles CAN be optimized to lessen the kick but I would advise against it (unless it's obviously too much kick) as the motor is in need of the TLC for now!

You can raise the head speed now a bit at a time, Keep in mind that with each new RPM change, there will be a slight break-in associated with it. By all means start putting some load on the motor! That is part of the break-in process and the loading and cooling cycle does most of the work. Just remember to let it cool fully after each flight as you do so and the the needles are adequately open as you do this, as this is when the heat comes in.

You don't need the idle stop needle for normal operations, just back it out. Yes, you it is rich, but that's OK. Don't adjust the needles for idle, use the throttle opening for that. Later you will learn how to just touch the low needle at idle for adjustment of the mixture.

The motor will require more fuel as it breaks in. The TRM instructions say to richen the motor up as it will be needed for the first several flights as the motor is requiring more fuel. What MA is telling you is to keep the needles rich and then they can be leaned out later for optimum performance, you will do just the same with the TRM (any Zen) motor.

The TRM motor will require more fuel than the stock Zenoah motor. The needles are now open on my motor at optimum setting further open than the stock motor will choke down on.

You can get a simple stack from Horizon for about $6 bucks. It's a Zenoah part #. That's what I am using right now, works great.

Hope this helps!

[Billme]

Very very good John.. Has your man done anymore on the pipe work?

Bill:)

[bigrcr]

Thanks Bill!
I will be getting with Al this week, I'm finally off work for a few days! Whew!!! :arggg: :arggg: :smokin: :smokin: :smokin: