Comments on: 12 Aerobatic Setup Secrets

By: Noel Boyd

Noel Boyd — Tue, 20 Jul 2021 14:52:09 +0000

I’m just now getting into 3/D planes but I only fly sport flying…NO 3D. I’ve been flying just over 2 years. I have a 67″ Slick 580 with a DLE 20 and a 52″ 3DHS EDGE 540 on 4S. My question is, what would be the best throw recommendations for these planes to do sport flying. Don’t want anything too sensitive. I normally only use high and low rates. Thanks in advance

By: Dwight Dean Law

Dwight Dean Law — Wed, 26 Aug 2020 01:09:17 +0000

Installing the control linkage closer to the center rotational shaft of the servo, and further from the rotational Centerline of the control surface will reduce the amount of force that the servo has two apply. If you go the opposite of this setup the force of the flight control will be much greater at the servo causing heavy loads and higher drain on the service road electrical system. I believe they’re giving you the best compromise in their explanation of the positioning of each end of the control rod for reliability and function. Flutter can be caused buy mini situations with regard to flight control systems. Flutter can be caused by improper balancing of the flight control on larger aircraft. On models the balance of a flight control is not as important as its rigidity with its input servo in most cases. Please leave any comment or Corrections if need be. Happy flying take care of your health.

By: John Vesper

John Vesper — Thu, 14 Nov 2019 16:51:06 +0000

I have only one issue with this article. It states, only partially correctly, that you want the control attachment to the servo arm to be as close to the center as possible to increase leverage and reduce flutter. In actuality, it is the ratio of the servo arm moment to the the control horn moment. Having the servo end of the pushrod 1/2″ from the center and the control end 1″ from the hinge line provides exactly the same leverage as having the servo end 1″ from the center and the horn end 2″ from the center. The latter having the advantage that and slop in the linkage will be only half of the total travel.

The above is, of course somewhat exaggerated, but the same principle applies. Pushrod setup should be with the clevises at the OUTERMOST possible location, and then adjusted inward until the desired throw is reached.