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flat tire vs. wheel fairing

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sarg314(at)comcast.net
Guest

Posted: Fri Nov 28, 2008 12:32 pm Post subject: flat tire vs. wheel fairing

I don't have the wheel fairings on my 6A yet. I just dragged the 

fuselage out of the garage around back to make room to clean the wings 

for painting.  It must of picked up a thorn (arizona is full of 

needle-like things) because the right main tire now seems to have a leak.



It occurs to me that if the wheel fairing were installed, the tires 

stick out a 1/2" or 1" below the fairing.  An even partially flat tire 

would quickly bring the weight of the plane down on the wheel fairing. 

I'm guessing the fairing would be pretty well destroyed in that event. 

Can any one comment on this?  Should I cut the fairings back further?



Seems like a pretty stiff penalty for letting a tire go flat.

--

Tom Sargent, RV-6A

rickpegser(at)yahoo.com
Guest

Posted: Fri Nov 28, 2008 2:14 pm Post subject: flat tire vs. wheel fairing

landing with a flat will do a hell of a lot more damage then just the fairing. can you say ground loop. while tires with leaks go dead flat in the hanger they don,t go dead flat in the air since there is no compression on the tire in flight. so normally you end up with a low pressure tire at the end of the flight.and can control it.



rick

--- On Fri, 11/28/08, tom sargent <sarg314(at)comcast.net> wrote:



 	  Quote: 	
		   From: tom sargent <sarg314(at)comcast.net>

 Subject: flat tire vs. wheel fairing

 To: rv-list(at)matronics.com

 Date: Friday, November 28, 2008, 12:28 PM

 

 <sarg314(at)comcast.net>

 

 I don't have the wheel fairings on my 6A yet. I just

 dragged the fuselage out of the garage around back to make

 room to clean the wings for painting.  It must of picked up

 a thorn (arizona is full of needle-like things) because the

 right main tire now seems to have a leak.

 

 It occurs to me that if the wheel fairing were installed,

 the tires stick out a 1/2" or 1" below the

 fairing.  An even partially flat tire would quickly bring

 the weight of the plane down on the wheel fairing. I'm

 guessing the fairing would be pretty well destroyed in that

 event. Can any one comment on this?  Should I cut the

 fairings back further?

 

 Seems like a pretty stiff penalty for letting a tire go

 flat.

 --

 Tom Sargent, RV-6A

rice737(at)msn.com
Guest

Posted: Fri Nov 28, 2008 5:51 pm Post subject: flat tire vs. wheel fairing

Hey Tom C

  

 >From experience C I can tell you that probably the only thing that would happen if you tire went flat in the hanger is that the 4 screw holes that attach the front and rear halfs to the fair bracket would become elongated C the rest fo the fairing would be fine.  When it happened to me C only the rear 2 holes got damaged C no biggy.  

  

 Paul Rice RV8



 	  Quote: 	
		   Date: Fri C 28 Nov 2008 14:13:18 -0800

 From: rickpegser(at)yahoo.com

 Subject: Re: flat tire vs. wheel fairing

 To: rv-list(at)matronics.com

 

 --> RV-List message posted by: RICHARD MILLER <rickpegser(at)yahoo.com>

 

 landing with a flat will do a hell of a lot more damage then just the fairing. can you say ground loop. while tires with leaks go dead flat in the hanger they don Ct go dead flat in the air since there is no compression on the tire in flight. so normally you end up with a low pressure tire at the end of the flight.and can control it.

 

 rick

 

 

 --- On Fri C 11/28/08 C tom sargent <sarg314(at)comcast.net> wrote:

 

 > From: tom sargent <sarg314(at)comcast.net>

 > Subject: flat tire vs. wheel fairing

 > To: rv-list(at)matronics.com

 > Date: Friday C November 28 C 2008 C 12:28 PM

 > --> RV-List message posted by: tom sargent

 > <sarg314(at)comcast.net>

 > 

 > I don't have the wheel fairings on my 6A yet. I just

 > dragged the fuselage out of the garage around back to make

 > room to clean the wings for painting. It must of picked up

 > a thorn (arizona is full of needle-like things) because the

 > right main tire now seems to have a leak.

 > 

 > It occurs to me that if the wheel fairing were installed C

 > the tires stick out a 1/2" or 1" below the

 > fairing. An even partially flat tire would quickly bring

 > the weight of the plane down on the wheel fairing. I'm

 > guessing the fairing would be pretty well destroyed in that

 > event. Can any one comment on this? Should I cut the

 > fairings back further?

 > 

 > Seems like a pretty stiff penalty for letting a tire go

 > flat.

 > --

 > Tom Sargent C RV-6A

 > 

 

 

&gt========================
	


 	  Quote: 	
		   

 

 


	


  [quote][b]

sbuc(at)hiwaay.net
Guest

Posted: Fri Nov 28, 2008 9:10 pm Post subject: flat tire vs. wheel fairing

RICHARD MILLER wrote:

 	  Quote: 	
		   

 

 landing with a flat will do a hell of a lot more damage then just the

 fairing. can you say ground loop. while tires with leaks go dead flat

 in the hanger they don,t go dead flat in the air since there is no

 compression on the tire in flight. so normally you end up with a low

 pressure tire at the end of the flight.and can control it.

 

 rick


	


In our local group we have seen two instances of RV-6A nose wheel tires 

either going flat enroute or immediately on touchdown, hard to know 

which. In both cases the tires could be pumped up enough to taxi the 

plane back to the hangar.



The RV nose gear tubes are strange animals and seem to go flat with no 

warning and sometimes for hard to determine reasons. Nose rollers need 

to be sure they carry a spare tube in the plane because the Lamb tube is 

hard to find.



Sam Buchanan



http://thervjournal.com

Robert.Moore(at)axcelis.c
Guest

Posted: Sat Nov 29, 2008 2:17 am Post subject: flat tire vs. wheel fairing

Your message doesn't make sense. 



"while tires with leaks go dead flat in the hanger they

don,t go dead flat in the air since there is no compression on the tire in flight."



If a tire is at, say, 32 psi isn't it at 32 psi whether it's jacked up in the air or has the weight of the airplane pressing on it? And if it's going to leak it will be leaking due to the pressure differential between inside the tire and outside the tire (in this case 32psi).



It's been a long night and if I missed something obvious I will apologize now before the flames start flying.



Bob



________________________________  Message 2  _____________________________________

Time: 02:15:01 PM PST US

From: RICHARD MILLER <rickpegser(at)yahoo.com>

Subject: Re: flat tire vs. wheel fairing

landing with a flat will do a hell of a lot more damage then just the fairing.

can you say ground loop. while tires with leaks go dead flat in the hanger they

don,t go dead flat in the air since there is no compression on the tire in flight.

so normally you end up with a low pressure tire at the end of the flight.and

can control it.



rick

sheldonb(at)frontiernet.n
Guest

Posted: Sat Nov 29, 2008 6:06 am Post subject: flat tire vs. wheel fairing

I had my nose wheel tire go flat on my 6A also... Normal landing... pulled 

off the strip onto the taxi way... Flat!... Not sure just when it went 

flat... but couldn't move the plane for the tire was wedged against the 

pant... Local RV'ers came to the rescue.. Lucky I keep a spare tube 

onboard... Back in the air within an hour... Only thing I could see on the 

tube, was a very small pin hole... Not even sure if this was the cause.. for 

the tire/tube was fine for a year before... I did enlarge the opening some 

on the pant...

Sheldon (RV6A 500 hrs)



---

sarg314(at)comcast.net
Guest

Posted: Sat Nov 29, 2008 7:01 am Post subject: flat tire vs. wheel fairing

Sheldon:

	Did the tire going flat damage the wheel fairing?



sheldon barrett wrote:

 	  Quote: 	
		   

 

 I had my nose wheel tire go flat on my 6A also... Normal landing... 

 pulled off the strip onto the taxi way... Flat!... Not sure just when it 

 went flat... but couldn't move the plane for the tire was wedged against 

 the pant... Local RV'ers came to the rescue.. Lucky I keep a spare tube 

 onboard... Back in the air within an hour... Only thing I could see on 

 the tube, was a very small pin hole... Not even sure if this was the 

 cause.. for the tire/tube was fine for a year before... I did enlarge 

 the opening some on the pant...

 Sheldon (RV6A 500 hrs)

sheldonb(at)frontiernet.n
Guest

Posted: Sat Nov 29, 2008 7:16 am Post subject: flat tire vs. wheel fairing

Just a little... in that the flat tire rubbed against the wheel fairing 

opening and gouged the edge some... otherwise, no other damage to the 

pant... The gouges gave me a clue as to where to enlarge the wheel opening 

in the pant...

Sheldon



---

tomasz(at)korwel.net
Guest

Posted: Sat Nov 29, 2008 8:10 am Post subject: flat tire vs. wheel fairing

RICHARD MILLER wrote:

 	  Quote: 	
		   



 landing with a flat will do a hell of a lot more damage then just the fairing. can you say ground loop. while tires with leaks go dead flat in the hanger they don,t go dead flat in the air since there is no compression on the tire in flight. so normally you end up with a low pressure tire at the end of the flight.and can control it.



 rick



   

Actually they can go more than dead flat during flight.
	




Dead flat is when inside the tube air pressure is equal to outside 

pressure. Which as we all know is different on the ground and up in the 

air. So it the tire develops leak it will equalize inside pressure to 

the one outside. If the plane sits on flat tires we also have change in 

volume, so actually if you jack up plane with dead flat tires, pressure 

inside such tube will be lower than outside due to increased volume. But 

on the other hand if you fly up there it can go down to let's say 7-8 

psi absolute, then you land and suddenly outside pressure is 15.2 psi 

absolute - your tire now again has less pressure inside than it is 

outside - in fact much less than when it was sitting flat in the hangar.



Tomasz

Terry Watson

Joined: 09 Jan 2006
Posts: 290
Location: Seattle, WA USA

Posted: Sat Nov 29, 2008 9:46 am Post subject: flat tire vs. wheel fairing

OK, you guys are messing with my mind. If a tire goes flat in the air and there is no runway there to flatten it, is it really flat? 



It's a quiet morning here in the rainy northwest.



Terry

Do not archive





--

AV8ORJWC

Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"

Posted: Sat Nov 29, 2008 10:17 am Post subject: flat tire vs. wheel fairing

It would be "devoid of the necessary differential air pressure" to support the weight of the mass and refrain from additional structural damage (at a later date).  Do you check the contained differential pressure before each flight?



Think of throwing a stick in the spokes of your tricycle as a kid.  Ouch.



John - Aurora, OR in the wet NW



PS - I spent last night shooting final topcoat paint on a new replacement nose fairing for an RV-6A which sustained this exact experience.  The new fiberglass is vastly improved over the nine year old variant.  Should be ready for installation tonight.  Was it flat.... Hell yes, It just was not obvious until the old fairing let loose from the result of lack of air pressure when the mass, inertial and terra firma joined as ONE.



--

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