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Backcountry Pilot • excessive trim change after Sportsman STOL

excessive trim change after Sportsman STOL

Have you modified your aircraft? STC? STOL Kit? Major rebuild from just a data plate?
8 postsPage 1 of 1

excessive trim change after Sportsman STOL

just finished the install on my 1956 C180.
first flight up high to stall, power on and off stalls,
gets a buffeting action right before stall, very mild on both
indicated says 45 Mph.

But I have to have a lot of nose up trim now. flying solo at 260 lbs and 5-10 in baggage compartment.

anyone experience this, is this normal.
will it change when I put the wing-x extensions on?

Thanks,
Bradley
doc_dyer offline
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Re: excessive trim change after Sportsman STOL

In the configuration you note, I was usually full nose up trim with my Horton equipped 180 for every landing. So I can see that flying slower would require even more.

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Re: excessive trim change after Sportsman STOL

I use a lot of nose up trim with my sportsmans kit equipped Cessna as well.


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88Echo offline
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Re: excessive trim change after Sportsman STOL

sounds normal to me
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Re: excessive trim change after Sportsman STOL

Bradley-

I'd say yes it is normal. When I'm light I use a lot of nose up trim. I haven't put the Wing-X on yet, so I can't speak to that. I have flown a C182A with stock wing and Wing-X.... do not get that nose up experience (but it's takeoff roll is shorter than my 180 w/Sportsman).

gunny
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Re: excessive trim change after Sportsman STOL

Same thing here, use full aft trim in my 182.
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Re: excessive trim change after Sportsman STOL

It makes sense to me - your modified airfoil makes more lift at the same AoA, which comes along with a higher pitching moment, which has to be countered by the tail, meaning more pitch trim required than before.
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Re: excessive trim change after Sportsman STOL

Thanks for all the replies.
I have yet to get the wing-x extensions on.
this is just the Sportsman, and with only .75 hrs on when I posted the question.
I placed a 50b ballast in the baggage compartment and flew another 6 hours in two days
took a while but I feel like I got my MOJO back a little.
still nervous to slow it down below normal (pre Sportsman) but getting there :D
She was down for all of May and I couldn't take it any longer :oops:
girls in my office we're asking if they could rent me a plane to go fly in :evil: so I would get into a better mood :oops:

she Got a new Horizon digital Tach and the Sportsman, still left to go is the Wing-x
weather was bad today or I would have flown up to 27K to try out the grass strip
posted in another thread :wink:
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