Why No Tabs On Wings? — Tech Ops Forum

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Why No Tabs On Wings?

David B. From United States of America, joined Jun 2001, 3148 posts, RR: 7
Posted (10 years 5 months 2 weeks 1 day 3 hours ago) and read 943 times:

Why are there no trim tabs on the wings of most aircraft? Is the pitch trim used for lateral trim too?

Teenage-know-it-alls should be shot on sight

5 replies: All unread, jump to last

Goldenshield From United States of America, joined Jan 2001, 5040 posts, RR: 14
Reply 1, posted (10 years 5 months 1 week 6 days 3 hours ago) and read 861 times:

Simple, Becuase the people who buy the aircraft are cheap. Besides, most aircraft don't need them.

Two all beef patties, special sauce, lettuce, cheese, pickles, onions on a sesame seed bun.

PPGMD From United States of America, joined Sep 2001, 2453 posts, RR: 0
Reply 2, posted (10 years 5 months 1 week 6 days 3 hours ago) and read 849 times:

GA or commerical?

With the computer controls these days trim tabs are not needed on the more modern aircraft.

At worst, you screw up and die.

Avt007 From Canada, joined Jul 2000, 2131 posts, RR: 6
Reply 3, posted (10 years 5 months 1 week 5 days 13 hours ago) and read 833 times:

I'l comment on the two types i know best, the F28, and the Dash 8. Both have trim tabs on the ailerons, mechanically operated on the F28, electrically on the Dash.

NKP S2 From United States of America, joined Dec 1999, 1714 posts, RR: 7
Reply 4, posted (10 years 5 months 1 week 5 days 3 hours ago) and read 811 times:

Even in most non-FBW A/C, aileron trim is not performed by tabs. The "neutral" in the feel/centering unit is just reset, either electrically or manually, to the desired amount of units of roll. It has nothing to do with "being cheap" or what have you.

Air2gxs From , joined Dec 1969, posts, RR:
Reply 5, posted (10 years 5 months 1 week 5 days ago) and read 806 times:

Anybody ever hear of the B727 or DC8. It does have aileron tabs. But on more modern aircraft NKP S2 is correct. The "trim" is actually set by changing the "center" in the centering and feel units.