blindfly

I hear that the 3w's has alot of engine cuts during the break in period (approx 5 hrs.)

does anyone have any experience with that?
should I be in safe potential height for the first few hours?

why not break in the engine on solid ground using fans to cool it and get the air flowing around it?
(I know the prop load is not the same but it still beats loosing your plane...)

happy flying

Diablo-RCU

My Feedback: (1)

You shouldn't have any problems flying the plane during the break-in. Don't over load the engine with too big a prop, run 32:1 petroleum oil, make sure the carb is set slightly rich, keep the engine cool with adequate air intake and exit in the cowl, work the throttle and avoid hovering, make sure your fuel lines can't suck an air bubble, and use a fuel filter.

Jemo

My Feedback: (5)

Copied from AI web site:

One of the most frequently asked questions we receive is:
"How do I break-in my new motor?"

We suggest you start by using a natural petroleum based two-cycle oil like LawnBoy or one of the other popular oils.

We suggest a 50:1 mixing ratio of gas to oil ( 2.56 oz. / gal. ). Don't skimp on oil! We even mix three ounces per gallon to be safe. Your engine will thank you for it.

The natural oil has mild abrasives in it that help break in your motor quicker. Run 6-7 gallons of the natural oil / gas mixture before switching to synthetic oil.

Q: "Why not just break it in on synthetic?"
A: "The lubrication properties of the synthetic oil are so extremely slick, it doesn't allow the motor to break in as quickly as with natural oil."

Avoid radical flying and prop hanging!
Fly conservatively until your motor breaks in.

When you switch to synthetic oil, we suggest you use 3W oil for best results.

Please DO NOT use a 100:1 mixing ratio.
It will VOID your motor warranty.

Happy Landings,
The A.I. Tech Department

Diablo-RCU

My Feedback: (1)

The only bit of disinformation is the "mild abrasives". Petroleum oil does not have mild abrasives. All lubricants are designed to minimize abrasive wear. Synthetic oils just do a better job of preventing metal to metal wear.

deputydog

I'm on my second gallon w/32:1 lawnboy. Its never quit yet! After the initial start up to check idle and hi speed, its been in the air. The only problem with the 3W might be the carb diaphram press hole. Too much cowl air press on it will make the engine stalll. There is an easy fix addressed on the Aircraft international website and in the instructions of the engine. No big deal!
GO FLY AND BE HAPPY!!!!

Jemo

My Feedback: (5)

Yes, they really shouldn't use that.