Roy Smith wrote:
Matt Whiting wrote:

It isn't that hard to overcome the trim on a 172. There are probably
airplanes where this isn't the case, but the 172 isn't one of them.


In theory, it should be possible on any plane. 14 CFR 23.677 (d) says:

"It must be demonstrated that the airplane is safely controllable and that
the pilot can perform all maneuvers and operations necessary to effect a
safe landing following any probable powered trim system runaway that
reasonably might be expected in service, allowing for appropriate time
delay after pilot recognition of the trim system runaway. The demonstration
must be conducted at critical airplane weights and center of gravity
positions."

Like they say, in theory there is no difference between theory and
practice, in practice there is. :-)

I've never flown an airplane where this wasn't the case, but then I've
flown fewer than a dozen different airplanes so I was hesitant to say all.


Matt