Hi Martin (and congratulations!)
It sounds to me that you have the best of both worlds! On take-off and landing
your CG shifts forward which is where you want it. Then in cruise, the CG
shifts
back which then decreases the download on the horizontal stabilizers which in
turn decreases the lift needed from the wings which results in less drag from
both the stabs and the wing! What a deal. I hope mine does the same....
Tom Friedland A 079 Mono J3300
MJKTuck@cs.com wrote:
> Hi Folks,
>
> When I did my weight and balance I ballasted such that typically I am in the
> mid-range of the envelope (60" - just aft actually) with just me on board and
> half fuel. When I take-off I set 1 division down trim on the MAC scale and
> the airplane just rises off by itself which is most satisfying.
>
> In the cruise however I find I have to use almost full downtrim. When I land
> the trim ends up about two divisions of up trim.
>
> Anybody else find this? Is the center of lift aft of the mid-range as shown
> on the CG envelope? as I'm assuming that if airplane CG matches center of
> lift then trim should be neutral.
>
> With two up I find I don't need quite so much nose down trim in the cruise
> which I guess is to be expected but its still quite forward.
>
> Any comments on optimum CG position for least drag from the tailplane and
> tabs would be appreciated.
>
> Oh, and by the way, Christine and I are expecting a baby in September!
>
> Regards
> Martin Tuck
> N152MT
> Wichita, Kansas
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