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  #1  
Old 04-07-2012, 07:48 PM
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Phil Phil is offline
 
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Location: Waco, Texas
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Default Wheel Pants - Alignment

I'm taking advantage of this mild weather to tackle a frustrating task.

Is this alignment correct on the rear of the mains (with regard to rotation)?

The bar on the left is a level that is perfectly square with the floor. The smaller bar on the right is a jig I built to rest the back of the wheelpant on, so it's always held level.

The difference between the two is what has me concerned. Should the aft end of the wheelpants match the square on the left, or is it correct?

I'm guessing it's correct, but I'd like to put my mind at ease.

Phil



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  #2  
Old 04-07-2012, 08:02 PM
Strasnuts Strasnuts is offline
 
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Phil, I believe mine look just like that. There would be no more drag by having them twisted that direction and it looks right when there is weight on the wheels. It would look funny if the pants where twisted the other way when weight was on the wheels.
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  #3  
Old 04-07-2012, 08:27 PM
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Thanks Sean...

Curious to see what others say too.

BTW - Those aren't my man boobs in the background. That's my dad.
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  #4  
Old 04-07-2012, 09:36 PM
BobTurner BobTurner is offline
 
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I think the important alignment is that nose to tail is parallel to the axis of the airplane, nose to tail. If that's off you'll notice a change in rudder needed to fly level, and more drag. Because of the funny gear leg geometry, the nose-aft direction rotates a bit when you un-weight the wheel.
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  #5  
Old 04-07-2012, 09:45 PM
Strasnuts Strasnuts is offline
 
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I was a little curious who's moob tubes those belong to.
Maybe a bro is in order?

That will be us before you know it!
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  #6  
Old 04-08-2012, 06:54 AM
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I just finished mine this past week and mine look similar.

Bob
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  #7  
Old 04-08-2012, 11:29 AM
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As do mine.....
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  #8  
Old 04-08-2012, 06:06 PM
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Mine were tilted a bit also, and as has been already mentioned, I dont think there is an aerodynamic reason for any particular rotation point.

I used the bottom cuff fairing to help set the pant rotation.

More here. http://www.vansairforce.com/communit...ad.php?t=68674
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  #9  
Old 04-08-2012, 06:18 PM
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If you aligned the fairing with the square on the left, you'd be aligning the fairing with the floor and, of course, you don't want to do that.

I just finished this with a 7A and on A models, the tire as she sits (or "he," I'm not sure which) is not parallel to the floor. In the 7A instructions, in fact, it notes that you're basically aligning with the tire tread. That's what Van's says, anyway

This is problematic with the wheel pant aft edge because you still have to align it with the parallel centerline of the airplane. For that, I just chose the midpoint of the trailing edge, dropped a plumb bob to the floor and used that line.

I also used an alternative method -- I ran a laser level up the middle of the tire and down the fairing.



The two methods yielded roughly (and by "roughly" I mean within 1/16" of an inch) the same results.

I just wrote about it here.
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