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I installed the Safety Trim module primarily to handle the two trim switches on the sticks and to deal with the potential (although extremely unlikely) of runaway trim due to a stuck switch or shorted switch. The stock ES elevator trim is uncontrollable in the full down position. I also installed a shorter throw trim servo to eliminate unneeded down trim. The two speed feature was more of an extra bonus in my airplane. I flew my ES with full speed trim for 4 years, bumping the trim switch, and it wasn't that big of a deal. With the two speeds you hold the switch for about a half second instead of tapping.
The Safety Trim module handles two trim switches automatically. It has a 3 second auto-off feature to catch runaway trim. It has a panel mounted three way momentary switch that allows the pilot to reverse the trim travel in the event of a stuck or shorted switch. And a two speed (both adjustable) feature that can be operated by a flap microswitch or airspeed switch.
I removed my Ray Allen speed control module and didn't need the Ray Allen Relay Deck that has been a failure point in the past. Although the new relay deck REL-2 is supposed to be more reliable that the old REL-1
The Safety Trim is just another goodie in a long list that wasn't necessary, but something that I thought added some additional safety and functionality
Mike Easley
Colorado Springs |