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  #1  
Old 01-02-2018, 12:16 PM
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DonFromTX DonFromTX is offline
 
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Location: La Feria Texas
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Default A Tale of Two Twelves

Something bugging me, I have flown a total of two RV12s, mine and the one Jetguy owns. In his it took a whole bunch of right rudder to keep on the centerline, with mine it does not require that. Same load, same engine, same plane, what would cause that?
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  #2  
Old 01-02-2018, 12:36 PM
RFSchaller RFSchaller is offline
 
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Was it dragging a brake on the left side?
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  #3  
Old 01-02-2018, 12:39 PM
sf3543 sf3543 is offline
 
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Cross wind on that big tail will do that
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  #4  
Old 01-02-2018, 01:31 PM
Canadian_JOY Canadian_JOY is offline
 
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Location: Ontario, Canada
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I'm discovering (in a completely different aircraft type) that things like alignment of gear leg fairings can also make a large difference in how much rudder is required to keep the ball in the centre.
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  #5  
Old 01-02-2018, 03:25 PM
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Piper J3 Piper J3 is offline
 
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Manual trim tab on rudder?
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  #6  
Old 01-02-2018, 04:09 PM
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DonFromTX DonFromTX is offline
 
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None of the suggested reasons apply, in fact with a crosswind I had to actually put in full right rudder AND some brake to keep centerline on takeoff. I think (but not positive) our props are pitched at each extreme limit, could that do it?
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  #7  
Old 01-02-2018, 04:14 PM
greghughespdx greghughespdx is offline
 
Join Date: Nov 2011
Location: Hillsboro, OR
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Would be interesting to compare the rudder shape/flatness/etc. of both airplanes.
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  #8  
Old 01-02-2018, 04:57 PM
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DaleB DaleB is offline
 
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How does it fly, and do you have a trim tab or wedge?

I've noticed that some days I need a boot-full of rudder and sometimes the occasional tap of the brake to keep it straight while taxiing; other days not so much. I attribute most of it to that big sail of a vertical stab.

I do know, however, that it was much worse trying to taxi when the nose wheel (sorry, nose fork) breakout force was way too high. Fixing that made a huge difference.
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Last edited by DaleB : 01-02-2018 at 11:21 PM.
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  #9  
Old 01-02-2018, 08:11 PM
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mike newall mike newall is offline
 
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Check the torque on the nose bolt and make sure it is castering correctly. Maybe too much load and a lack of centring ?
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  #10  
Old 01-03-2018, 05:56 AM
BigJohn BigJohn is offline
 
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Location: Gloversville, NY
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Default Off Topic Question

Don, I was just thinking the other day I havent heard from you in a while, or maybe I just missed it. What is the status of your BFR and RV-12 checkout?
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