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weight & balance

 
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slyck(at)frontiernet.net
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PostPosted: Sun May 07, 2006 7:46 am    Post subject: weight & balance Reply with quote
This spring I removed the last 15# bar of lead from the nose of my
MkIII.
I will now be able to use the vacant chamber for drug smuggling.
With zero trim on the little springy gadget, the plane is neutral at
cruise
and slightly nose high with reduced power. -not enough to change
anything.
Now to coax my lady friend into the right seat. A couple notches should
take care of her 120#.
I'll placard the plane with a "no fat chicks" sign.
-BB do not archive

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John Hauck



Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
PostPosted: Sun May 07, 2006 8:38 am    Post subject: weight & balance Reply with quote
| With zero trim on the little springy gadget, the plane is neutral
at
| cruise
| and slightly nose high with reduced power.

| -BB
Bob/Gang:

My mkIII is neutral in pitch trim with power off. Bring up the power
and nose up forced trim is required. All of the mkIII's I have flown
trim out about the same.

A lot of pitch change can be made by adjusting the leading edge of the
horizontal stabilizer up and down. For my mkIII, once I found the
sweet spot, I have not changed the position. Even after installing an
11 lb Maule Tundra Tailwheel, Miss P'fer still needs nose up trim for
cruise, and during power off, she rides pretty much tail low.

Never added weight to nose or tail to bring the numbers on the weight
and balance together. I figure weight and balance is done in a static
situation. In flight, a lot of things are changing on Kolbs. As long
as mine flies well, stalls nose first, has plenty of control
authority, both pitch up and down, I am happy.

Two up in mkIII's normally requires a lot of nose of pitch with power
on, and little or no nose up pitch, power off. Most of my flying is
solo, which I prefer. Airplane performs much better without the extra
load up front.

Loaded for long cross country flights, 150 lbs of fuel and 125 lbs of
gear are stowed behind the bulk head. A small amount finds it way to
the left seat, behind the left seat, and about half a dozen MRE's go
up in the nose. Takeoff weight is very close to 1,200 lbs. She flew
well with the 582, 912ul and now with the 912uls. A great little
airplane that continues to satisfy my flying requirements. Still
haven't found anything to replace her with.

john h
mkIII - 2450+ hours
912uls- 1150+ hours

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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama
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slyck(at)frontiernet.net
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PostPosted: Tue May 09, 2006 4:59 am    Post subject: weight & balance Reply with quote
Quote:

Takeoff weight is very close to 1,200 lbs. She flew
well with the 582, 912ul and now with the 912uls. A great little
airplane that continues to satisfy my flying requirements. Still
haven't found anything to replace her with.

john h
mkIII - 2450+ hours
912uls- 1150+ hours

Must feel a lot different from mine. My takeoff weight is about 750

now.
Four gallons of fuel will do a lot of flying. Thom Riddle was flying
alongside in his Allegro yesterday and verified that my ASI doesn't work
too well. It goes a bit faster than indicated at cruise which explained
why full throttle appeared to yield only more noise and a nose down
feel.
Also considerable discomfort in even mildly bumpy air.
Now I throttle back for a smoother ride, don't like that choppy feeling.

-Still need to GPS a real number.
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Quote:




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