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Wheel Fairings Question for those who have completed

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Tim(at)MyRV10.com
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Posted: Sun Jul 09, 2006 2:03 pm Post subject: Wheel Fairings Question for those who have completed

I think they're shooting for the fairings to be perfectly vertical

and straight ahead while in flight with the gear hanging.



Tim

do not archive

Bobby J. Hughes wrote:

 	  Quote: 	
		   A question for those who have installed the Wheel Fairings. Is the 

 vertical line on the rear fairing marked in 48-2 fig 4 actually vertical 

 in flight attitude as referenced in 48-6 fig 2? Or is the top of the 

 vertical line actually kicked outboard at the top of the fairing in 48-6 

 fig 2?

  

 48-5 fig3 and 48-7 fig1 seem to indicated it would be kicked outboard.

  

 Thanks,

  

 Bobby Hughes

 40116

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bhughes(at)qnsi.net
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Posted: Sun Jul 09, 2006 4:27 pm Post subject: Wheel Fairings Question for those who have completed

Tim,



That is what I would expect but it is not working out that way for me.

For my vertical line to be straight it places the 1/2" hole for the leg

reference below where the legs actually contact the fairing.  3/4 to 1"

below. If I use the 1/2" reference hole the rear vertical line is kicked

outboard. Almost looks like if the weight was on the gear the vertical

line would kick in and become vertical. Other than this all the other

reference lines are ok.  



Bobby



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Tim(at)MyRV10.com
Guest

Posted: Sun Jul 09, 2006 7:07 pm Post subject: Wheel Fairings Question for those who have completed

It should be a matter of enlarging the gear leg hole, or moving

the brake bracket holes that hold the fairing.  I know it's a

pain, but if you want them perfect and correct, you'll be adjusting

them a bit to make them vertical.  I can remember making a couple

of statements when I got mine done....



*) The Wheel fairings are worse than doing the doors.

*) I REALLY don't like doing the wheel fairings

*) The wheel fairings really stink when you have to do them after you're

	flying already.



My plane flew almost perfect with no rudder correction before I added

wheel fairings.  I put the fairings on and they weren't aligned as

good as I wanted...they were toed out.  I re-worked them to try to

correct it.  Ended up still not perfect.   Now the ball is something

like 1/2-3/4 out to the right when flying.  Had to add a rudder

block for the time being.



So, my best advice is to look at what's going on, see if you can figure

out where to adjust, and then adjust as best you can, if you want the

plane to fly straight.  Sadly, the leg fairing and gear fairings are

probably the most critical thing you have to having a straight flying

plane.   On the mains, the outer hole where the axle shaft goes,

is kind of a fixed spot.  That just means the innner mountings with

the 4 screws may need to be moved around a bit, and the hole enlarged

for the gear leg.  To make you feel better, you can enlarge that center

hole for the gear leg quite a bit, because the fairing will cover

it all anyway.



Isn't the wheel fairing section fun?  It was my least favorite

part of the build, and to this day is the one thing I wish I

had the motivation to re-do.  For now, it's a rudder trim block.



Tim Olson - RV-10 N104CD - Flying

do not archive

Bobby J. Hughes wrote:

[quote] 

 

 Tim,

 

 That is what I would expect but it is not working out that way for me.

 For my vertical line to be straight it places the 1/2" hole for the leg

 reference below where the legs actually contact the fairing.  3/4 to 1"

 below. If I use the 1/2" reference hole the rear vertical line is kicked

 outboard. Almost looks like if the weight was on the gear the vertical

 line would kick in and become vertical. Other than this all the other

 reference lines are ok.  

 

 Bobby

 

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dmasys(at)cox.net
Guest

Posted: Mon Jul 10, 2006 6:26 am Post subject: Wheel Fairings Question for those who have completed

---- Tim Olson <Tim(at)MyRV10.com> wrote: 

 

 	  Quote: 	
		   My plane flew almost perfect with no rudder correction before I added

 wheel fairings.  I put the fairings on and they weren't aligned as

 good as I wanted...they were toed out.  I re-worked them to try to

 correct it.  Ended up still not perfect.   Now the ball is something

 like 1/2-3/4 out to the right when flying.  Had to add a rudder

 block for the time being.


	


If the -10 has similar aerodynamic forces to the 2 place RV's, it will be the alignment of the gear leg fairings that is more important even than the wheel fairings.  Seems counterintuitive given their sizes, but the positioning of the gear leg fairings up in the prop disc airflow makes them pretty efficient flight control surfaces.  You can get more effect on the centering of the ball by playing with a quarter to half inch of movement of the trailing edge of the leg fairing than an inch or more of repositioning of the wheel fairing trailing edge.



Try it.  You might like it .



That said, I also have a permanent wedge on the rudder of my -7A.  



-Dan Masys

40448

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