Can anyone tell me what the base-line setting for the air bleed screw on an OS LA 46 is? One of the local "experts" told me you opened it up inserted a straight pin, then turned the air bleed screw in until it contacted the straight pin. It seemed a little arbitrary to me, but he has 27 years experience and I'm working on week 2.

Now when we fly the plane (Eagle II) it still seems to sag, in what I'm told is a lean condition about halfway through a tank of fuel, even with what I think is a way too rich needle-valve setting. I've got about 8 flights on the engine, plus a couple of tanks run through on the ground, so I'm assuming the engine should be getting towards being broken in.

My theory is that at hight throttle settings, the engine could be pulling enough air through the bleed hole to mess with the needle jet settings. My plane comes down after a fight looking like it flew through an airborne oil slick. Other planes at the field running the same fuel seem to be wearing much less spooge.

There are a couple of LT-40's at our field, one with a TT Pro 40 , and one with a TT Pro 46, and they just sing! My engine will hardly pull me over the top of a loop! Both LT-40's spank my plane going straight and level. Yesterday I had to fly full throttle just doing circuits and figure 8's. (Ad nauseum as per instructor!)

I want to get back to base-line settings and tune it as per the owner's manual and see if I can get it sorted out.

Also, right now I have a 10x6 prop on the engine, that's what was on it where I got it so I have not changed anything. I've noticed that the manual recommends 11" props for this engine. Should I change the prop? Being an utter newbie I imagine that using a shorter prop will give me an extra bit of margin for error on landings (hopefully will get to try a few today!) but a longer prop would move more air right?

I have just put a brand new fuel tank in the plane and am running XP Sport fuel with 10% nitro.

Cool hobby! Much less expensive than dirt-bikes and I haven't needed a ride home in an ambulance yet....SWEET!

Thanks in advance!