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Old 08-25-2007 | 08:01 AM
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Cyclic Hardover
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Default RE: TWINS! - Any advice for a first timer?

ORIGINAL: Ed_Moorman

I am on my 24th twin and I also have a TwinStar with 2 GMS .32s. It now has larger ailerons and is on floats and I don't recommend those engines.

It doesn't have much out thrust, only 2 or 3 degrees. To cancel yaw on 1 engine to where you don't need rudder, you need 8 degrees out thrust and I have tested this on more than one plane, but not on the TwinStar (Twin Stick, Tiger 2 twin conversion, World Models Sky Raider Mach II twin, A-frame original twin).

The absolute best thing you can do is follow the advice given above about tuning each engine by itself. You do not want to peak them out. You want them leaving a nice smoke trail, otherwise, one is sure to quit.

Here's a couple of other maxims I have learned the hard way. 1. Never tune one engine of a twin with the other one running. You are sure to screw it up. Shut down, set the engine and crank the other back up. Trust me, here.

2. Next, never let your buddies tune your engines. They haven't a clue about twins and they will get your engines too lean. If they reach for your needles, yell, "NO," or shut down and tell them to keep their mitts off. Trust me on this again.

With two .15LAs, you are going to be in trouble if one quits. If other people are flying, you may not hear one engine slow down and quit. If the plane does something weird, no matter what, you have probably lost an engine. Chop the throttle back to idle and pretend you are dead stick. If you see both fans turning, then throttle up part way. If one is out, you might be able to hold rudder and get some power out of the remaining engine, but you probably won't have enough for level flight. Aim for the grass or somewhere away from trees, etc. A hard landing is better than a crash.

I don't have nearly the twin experience as Ed here but have set up a few and agree on dialing the engines in one at a time without the second one running. Then tweak from their.