109 elevator trim

[Robo.]

Originally Posted by Flanker35M

So the trim was used in Bf109 and other planes to compensate the changing flight conditions, like in any other plane. The extent to which pilot used elevator trim in a Bf109 can only be speculated, some might have used more than others.

Of course, but it is apparent that the 109 elevator trim was rather specific with the design and purpose. Feel free to google for French tests of the same captured Emil and what they state regarding elevator trim (when compared to D.520 iirc)

Originally Posted by Flanker35M

Finns did use elevator trim to pull out from high speed dives as the controls went almost solid. But then we are talking about speeds excess 700km/h, not the usual 300-500km/h.

Not just Finns but everybody There is specific paragraph regarding trim wheel use in a dive in the manual. (Sturzflug) You set it incorrectly and you can end up in very unpleasant crater situation. There is also factory test of the dive characteristics with different trim settings out there. This was overly important of course.

Originally Posted by Flanker35M

I also read from a P51D pilot's combat story that he did fiddled with trims even in combat to achieve best performance. And a Pony had more trims than Bf109

American a/c have had a bit different approach to trims. While we're at the Finns, have a look how they compared US made Brewsters and MTs regarding trims.

Originally Posted by Flanker35M

This is hard to model into a game as there is no absolute truth how it works. We have the travels, rotations etc. but the rest..?

It is hard to model, but still possible. What we have got at the moment is not good enough imho, hence this thread.

[robtek]

How long does the full travel from -3 to +8 degree take in game?

I only know for shure that the reaction is much slower than my trim axis.

I think 4 quarter turns a second is normal for a pilot familiar with the 109, that would make it 5 seconds for a full change, which never would happen.

So, to trim nose up one might need 2, max. 3 degree + on the elevator, as it is only needed to get the lead for a few seconds, taking 1 turn of the wheel or about 1 second and is easily feasible, imo.