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  #1  
Old 12-27-2018, 10:16 PM
Tacco Tacco is offline
 
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Location: White Salmon, WA
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Default Dynon AP Trim Speed

With the Dynon AP Control Panel installed, my trim tab speed is about twice as fast as “normal”. 15 seconds versus 25-30 seconds stop to stop. I understand the reasons for this. My question is does anyone find that too sensitive when manually trimming the aircraft.
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  #2  
Old 12-27-2018, 10:28 PM
rvbuilder2002 rvbuilder2002 is offline
 
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Quote:
Originally Posted by Tacco View Post
With the Dynon AP Control Panel installed, my trim tab speed is about twice as fast as “normal”. 15 seconds versus 25-30 seconds stop to stop. I understand the reasons for this. My question is does anyone find that too sensitive when manually trimming the aircraft.
I surely would.

The Dynon trim speed profile can be adjusted in the set-up menu
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  #3  
Old 12-28-2018, 11:28 AM
Tacco Tacco is offline
 
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Scott, do you have any recommendations for speed settings to use?
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  #4  
Old 12-28-2018, 12:06 PM
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MartySantic MartySantic is offline
 
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No faster than the recommended 30 seconds. Even with that speed, trim control is VERY VERY sensitive.
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  #5  
Old 12-28-2018, 12:27 PM
rvbuilder2002 rvbuilder2002 is offline
 
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Quote:
Originally Posted by Tacco View Post
Scott, do you have any recommendations for speed settings to use?
Like Marty said, set up the cruise speed trim rate to be no more than the standard 30 seconds limit / limit.
If you wish to use a variable trim rate setting 100% for speeds below about 70 Kts and minimum rate for any speed above about 90 kts seems to work well.
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  #6  
Old 12-28-2018, 12:28 PM
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Piper J3 Piper J3 is online now
 
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I thought Dynon had trim speed based on IAS. In other words... in cruise, the trim was very slow so it isn't sensitive and at slower pattern speeds the trim is faster because you need more trim deflection in a short amount of time.

Oooops... Scott and I typing at same time ^^^^
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  #7  
Old 12-28-2018, 12:46 PM
rvbuilder2002 rvbuilder2002 is offline
 
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Quote:
Originally Posted by Piper J3 View Post
I thought Dynon had trim speed based on IAS.
Only if the optional Autopilot switch panel is installed (or if using an AFS ACM quick panel module... not likely relevant to an RV-12 though).
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  #8  
Old 01-03-2019, 11:50 AM
Tacco Tacco is offline
 
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First flight complete. I set the trim speed as Scott suggested above. Felt good slow and fast air speeds.
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