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Lorn,
Most interesting.. Your empty weight CG would seem to indicate a more
rear ward base CG. Yet, loaded with your Falstaffian self,header full, etc.,
your CG and mine would be quite similar (mine = 24.8). Yet, I have
full elevator authority. Hmmmmm. Are you getting the
proper up deflection of the elevator? Same Question to
Mark................
Scott
PS Almost all of my landings are with the full 45 degrees of flap...
In a message dated 10/1/2008 3:27:17 P.M. Central Daylight Time,
lorn@dynacomm.us writes:
Mark
& Scott,
My empty CG is 22.3". With a 150# pilot and 8 gal in the
header I
would be at 24.5".
My fore and aft CG limits are
24.9" and 30.6".
With my harmonic dampener, Aero Composites prop, me
(250#), 20# of
tools up front, 5 more in back and full header. I
get: 25.7". I land
like this some times but can only use 25° of
flap. No wonder I don't
have enough elevator.
Loaded up a lot
to 1,900#, my CG is 29.5" and thats pretty far back.
Lorn
>
From: Sky2high@aol.com
> Date: September 30, 2008 10:47:55 AM
GMT-04:00
>
> Mark,
>
> Even more
interrrrresting........
>
> What is your empty weight CG?
Mine is 20.8" Also, with a 150#
> pilot and 8 gal in the
header my CG would be out of the forward
> envelope at 23.4""
(12% MAC). BTW, I have a 12# harmonic damper on
> the
flywheel along with the heaviest Hartzell prop.
>
> What is your
flap setting for these landings? Moving the flaps up
>
somewhat can change the pitch authority and I wonder if you have
> tried using the flaps to assist in elevator
authority.
>
>> Scott
>>
>> In a message
dated 9/29/2008 12:14:46 P.M. Central Daylight Time, mjrav@comcast.net
>> writes:
>> I suppose I qualify at 150
lbs.
>> Std 360, battery in the footwell, Hartzel CS
prop.
>>
>> Generally, I make a point to NOT have all fuel
in the header on a
>> lightweight landing. Having it 1/4
to 1/2 full is safe enough.
>> What happens is that I run out of aft
stick travel in the flare and
>> will have a hard landing if
I'm not very close to wheels down.
>> The further foreward the CG,
the faster the landing speed must be.
>> Mostly, it's
just hard on the tires.
>> .
>> .
>> Mark
Ravinski
>> 360 1447 hrs 1077 of it
mine.
--
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