Does a 4-Place need adjustable aileron trim?

[DavidGA2]

I am scratch building a 4-Place and I am wondering if the ailerons require adjustable trim. I see no provision for it. I built and fly an RV6 and it definitely requires adjustable aileron trim.

[jaredyates]

I'd say no. Rudder trim, maybe, but no need for aileron trim in my experience, if the plane is rigged right.

[Ray Strickland]

I’m with Jared.

[whee]

David, I’m curious, what conditions require an aileron trim? I’ve never flown an airplane that I felt needed it.

[TLyon]

The RV-7 I’m flying has a noticeably different control pressure as fuel burns or if one pax is significantly different weight. Not a big deal not to have it, but I could see it being nice to have aileron trim to be able to cruise hands off.

[DavidGA2]

My RV6 is the same way. When I carry a passenger, I trim it for hands off and then when I fly by myself, I have to retrim. Perhaps the high wing and improved stability of the Bearhawk is the difference. Thank you for the response. Now I feel better about moving forward without it.

[rodsmith]

Sorry for off topic comment, your putting the M14P in your plane? If so I sure want to see pictures.

[kestrel]

If you had hard points under the wings for bicycles and the like, you might appreciate both roll and yaw trim.

[Battson]

I do reflect on this question - I think if people all installed aileron and rudder trim, most planes would be 1 to 3 knots slower because they would all be out flying around out of rig

Rigging a plane right is an iterative and somewhat tedious process of chasing down gremlins, until you're within the margin for error.