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  #1  
Old 04-07-2021, 07:53 PM
gcrane01 gcrane01 is offline
 
Join Date: Mar 2010
Location: Northern CA
Posts: 13
Default No flaps

Rv8 A. Flaps work on the ground whether on battery or alternator power. In the air they wonít move. Checked for obstruction behind seat and all. Nothing obvious. Any ideas?
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  #2  
Old 04-07-2021, 08:02 PM
Carl Froehlich's Avatar
Carl Froehlich Carl Froehlich is offline
 
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Location: Dogwood Airpark (VA42)
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Default

Are you using a Flap Positioning System - the one with the notched rod that trips micro switches?

Carl
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  #3  
Old 04-07-2021, 08:32 PM
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scrollF4 scrollF4 is offline
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Location: Flower Mound, TX
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Default And/Or....

...are you using Vertical Power Pro VPX and an EFIS (like SkyView)? VPX can be programmed to limit/inhibit flap actuation based on pilot-set airspeeds. The airspeed may be set too low.
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  #4  
Old 04-08-2021, 01:44 AM
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mike newall mike newall is offline
 
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Default

Probably the old grease contamination. Strip the motor/gearbox and check for grease from the gearbox getting into the motor.
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  #5  
Old 04-08-2021, 08:52 AM
gcrane01 gcrane01 is offline
 
Join Date: Mar 2010
Location: Northern CA
Posts: 13
Default

No flap positioning system or anything fancy. This RV was finished in 2004 before all the fancy stuff came out. This is a pure hit the switch, look out the window and check the position of the flaps.

I'm going to try to put resistance on the flaps while I hit the switch. Electrically nothing changes when I'm airborne
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  #6  
Old 04-09-2021, 09:01 AM
FinnFlyer FinnFlyer is offline
 
Join Date: Aug 2018
Location: Bell, FL
Posts: 495
Default Don't fly

There is a service bulletin about safety-wiring the flap motor output shaft (screw).

Make sure it hasn't worked itself all the way out of the rod end.

(Sorry if I'm wording this wrongly.)

Finn
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  #7  
Old 04-10-2021, 05:30 PM
gcrane01 gcrane01 is offline
 
Join Date: Mar 2010
Location: Northern CA
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Thanks. Iíll check that out.
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