21.02.2009, 15:07
Not all aircraft have trim on all their control surfaces. Even most modern light aircraft only have elevator trim.
Adding the trim surfaces and the gear to operate them adds weight, complexity, and build time to an aircraft. If the stick/control forces aren't too great, the designers will leave them out.
Adding the trim surfaces and the gear to operate them adds weight, complexity, and build time to an aircraft. If the stick/control forces aren't too great, the designers will leave them out.