Trim motor speed

[rvbuilder2002]

A little bit of follow-up info for anyone that ends up here in the future.....

I don't have a lot of direct experience with the AP control panel, so gave a bit of incorrect info. This post is to correct/re-confirm info in this post and add some additional info......

An RV-12 with the AP control panel does not use the AV-50000 for pitch trim speed control, so the trim pot on the box will not cause any speed change.

The pitch trim is automatically set up to variable rate (adjusted based on IAS) if the presets file is downloaded from the Van's Aircraft web site and installed into Skyview. KAI Section 58 (currently page 58-06) instructs builders to go to the web site and download the file. The zip file contains a read-me file that gives further details regarding the firmware installation into Skyview.

The RV-12 flight training supplement explains that with an AP control panel installed, the trim speed is controlled by the autopilot system and that if the AP is off-line, pitch trim will still be functional but it will revert to the 0 IAS value rate at all times (quite sensitive at cruise speed).

[Rayh]

Thanks Scott

[dynonsupport]

And too add:

1) The trim controller has a 5 second timeout. This prevents trim run-away if a switch were to fail and stick.

2) If the SkyView system fails in flight, the trim speed will default to the 0 IAS condition, not "full speed". The only time it would be full speed is if SkyView never booted and the module didn't get configured with the settings in SkyView.

[rvbuilder2002]

Originally Posted by dynonsupport

And too add:

1) The trim controller has a 5 second timeout. This prevents trim run-away if a switch were to fail and stick.

2) If the SkyView system fails in flight, the trim speed will default to the 0 IAS condition, not "full speed". The only time it would be full speed is if SkyView never booted and the module didn't get configured with the settings in SkyView.

Thanks
I edited my post

[DaveWelch]

Please add mention of the 5-second timeout to the PAP discussion where we are told to "Run it 'till it stops" and then measure the trailing edges of the Stabilator vs. the AST. I spent a LOT of time searching this site, checking the linkage, checking the wires, and re-doing the procedure until a friend noted that it would run some more if you press the switch again.

This thread is the first time I've seen the 5-second timeout mentioned.
Great feature, but would be nice to know during the build and PAP.

If I'm wrong and it is described somewhere that I missed...please send a Crow, I'll eat it and post the video. Wouldn't be the first time <grin> Could I at least have some Peppa Sauce?