Trim tab travel

[Wes Helm Bearhawk 1209]

Can anybody tell me the travel for the trim tab on the elevator thanks Wes

[Battson]

It will vary depending on how you set the trim tab horns up. Usually the tabs don't need to move far, not more than 10-15 degrees, certainly that's the most nose down trim you would ever need. But at odd times you need a lot of nose up trim.

The highest trim deflection happens with a STOL landing configuration, with the plane dead-light. That needs about 70% up elevator, which takes quite a lot of trim travel - perhaps 25 or 30 degrees. Although it's easier not to trim the whole way, and just hold a little extra back pressure.
When I am completely empty in this situation, landing as slow as possible, I run out of trim (and almost elevator) travel.

[Wes Helm Bearhawk 1209]

[QUOTE=Battson;19167]It will vary depending on how you set the trim tab horns up. Usually the tabs don't need to move far, not more than 10-15 degrees, certainly that's the most nose down trim you would ever need. But at odd times you need a lot of nose up trim.

The highest trim deflection happens with a STOL landing configuration, with the plane dead-light. That needs about 70% up elevator, which takes quite a lot of trim travel - perhaps 25 or 30 degrees. Although it's easier not to trim the whole way, and just hold a little extra back pressure.
When I am completely empty in this situation, landing as slow as possible, I run out of trim (and almost elevator) travel.

[Wes Helm Bearhawk 1209]

[QUOTE=Wes Helm Bearhawk 1209;19172]

It will vary depending on how you set the trim tab horns up. Usually the tabs don't need to move far, not more than 10-15 degrees, certainly that's the most nose down trim you would ever need. But at odd times you need a lot of nose up trim.

The highest trim deflection happens with a STOL landing configuration, with the plane dead-light. That needs about 70% up elevator, which takes quite a lot of trim travel - perhaps 25 or 30 degrees. Although it's easier not to trim the whole way, and just hold a little extra back pressure.
When I am completely empty in this situation, landing as slow as possible, I run out of trim (and almost elevator) travel.

Thanks trying to make sure I had enough travel in my trim hinges

[jaredyates]

With the lighter engine, I see much less, approximately plus and minus 3/4" at the trailing edge.

[bergy]

How wide is each section of trim-tab-hinge supposed to be?

[Mark Goldberg]

I am not by my planes to measure what we do at the kit factory, but will guestimate about 1.5". Could be a little less. Mark

[whee]

The section of tube welded onto the tab is 3/4". The two sections welded onto the elevator are 3/8". That makes each hinge a total of 1.5" long.

[bergy]

Just what I was looking for. Thnak you

[Bdflies]

Whee's picture brought up a thought; when covering the horizontal stabilizer and trim tabs, take great care to minimize layers at the interface of these components! There's not much space, between the hinge tubes and the opposing part. Now, I'm sure most of you are saying "Duhhh".. It wasn't the first thought on my mind, while covering and I had a real fight putting the hinge pins in!

Bill