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Hello fellow Lancair pilots,
I'm still searching for some answers, and I just keep coming
up with more questions. The basic problem is this:
When I lower flaps on my 360, there is not
enough pitch trim to take out the nose up stick force required to keep my pitch
attitude.
Having just read C.J. Stephen's CAFE report on a Lancair 320
in an old 1999 issue of Sport Aviation, he made no mention of this anomoly in
his flight test report. I figured if it were noticed, it would *definately* be
mentioned. So, now I have more questions...
The most important to me:
1. Is this a simple matter of taking a look at my elevator
trim motor and seeing what it's travel limits are?
1a. Is my aircraft's horizontal incidence set wrong? (I didn't
build the plane, how hard is this to screw up?)
1b. Do I need to modify or increase the size of my trim
tab?
2. During cruise flight, and only at aft cg conditions,
my elevator does not trail the horizontal stab. It rides down, indicating my
tail is heavy. Here are a few examples of my elevator position:
Above - High speed, 210 mph indicated, mid cg (myself @230,
full or nearly full header tank and approx 20 gal in wings). Elevator is perfect
and trails the stab nicely. We like this.
110 or 120 knots, just me in the plane, don't remember the
fuel load. Elevator is slightly up, making me think fwd cg. In the condition I
am asking about, the elevator rides this far down, if not a little
more.
Not a great shot. Nearly full of fuel, just me in the plane,
and a bag in the baggage. You can't see it too much, but the elevator is riding
down a bit. This is the condition I am asking about. I know it's an aft cg, but
does the elevator really ride this low on these airplanes?
Final question, and thanks for being patient...
3. Have any of you with a O-360 modified the lower intake
portion of the cowl, or the oil cooler outlet, to reduce volume, area and drag?
I am very interested in your ideas and seeing photos if you have.
I thank you,
Scotty G
Dago Red Unlimited Air Race Team
Unleashed
Sport Class Air Race Team
WarbirdAeroPress.com
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