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Flat main tire on takeoff or landing

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flying(at)jeffhove.com
Guest

Posted: Tue Sep 01, 2009 1:21 pm Post subject: Flat main tire on takeoff or landing

Has anyone with a 7A (or other RV) experienced a flat main tire during 

takeoff or landing?  Were you able to keep it on the runway?  Did the 

wheel-pant survive?



I had a left main inner-tube fail during the taxi to the runway last 

week and even at a slow taxi it was hard to keep it straight as the tire 

deflated.  Had the tube let go a minute later I'd have been on the 

take-off roll.  The tire was fine and the tube was only 2 years old and 

looked ok except for a quarter-sized area where the rubber had become 

cracked and leaky.  Apparently a manufacturing defect as there were no 

rough spots or FOD in the tire to cause this.



The way the tire bunched up inside the wheel-pant made me wonder if the 

wheel would continue turning and if even full opposite rudder and brake 

would be enough to keep the plane rolling straight had this happened at 

a higher speed.



Thanks,

   Jeff Hove



Flying my father's RV-A, N347RV.

lrhelming(at)gmail.com
Guest

Posted: Wed Sep 02, 2009 4:10 am Post subject: Flat main tire on takeoff or landing

No I haven't and I don't know of anyone.  Sounds like you were lucky not to have lost control.  I suggest you check tire pressure during each flight's preflight inspection.  I know my tires lose pressure with time and flying time and landings.  You might consider the new tubes that cost more but don't lose pressure.  Also, maybe more space between the tire and wheel faring should be considered.  Contact Vans for more info. 

   

  Indiana Larry

 On Tue, Sep 1, 2009 at 3:04 PM, Jeff Hove <flying(at)jeffhove.com (flying(at)jeffhove.com)> wrote:

  	  Quote: 	
		  --> RV7-List message posted by: Jeff Hove <flying(at)jeffhove.com (flying(at)jeffhove.com)>

 

Has anyone with a 7A (or other RV) experienced a flat main tire during takeoff or landing?  Were you able to keep it on the runway?  Did the wheel-pant survive?



I had a left main inner-tube fail during the taxi to the runway last week and even at a slow taxi it was hard to keep it straight as the tire deflated.  Had the tube let go a minute later I'd have been on the take-off roll.  The tire was fine and the tube was only 2 years old and looked ok except for a quarter-sized area where the rubber had become cracked and leaky.  Apparently a manufacturing defect as there were no rough spots or FOD in the tire to cause this.

 

The way the tire bunched up inside the wheel-pant made me wonder if the wheel would continue turning and if even full opposite rudder and brake would be enough to keep the plane rolling straight had this happened at a higher speed.

 

Thanks,

 Jeff Hove



Flying my father's RV-A, N347RV.http://www.matronics.com/Navigator?RV7-List

  href="http://forums.matronics.com/" target="_blank">http://forums.matronics.com

                    -Matt Dralle, List Admin.

 =====



	




  



-- 

In God I Trust.  

  [quote][b]

rv7(at)b4.ca
Guest

Posted: Wed Sep 02, 2009 8:27 am Post subject: Flat main tire on takeoff or landing

On Tue, 01 Sep 2009 15:04:31 -0500 Jeff Hove <flying(at)jeffhove.com> wrote

 	  Quote: 	
		   The tire was fine and the tube was only 2 years old and

 looked ok except for a quarter-sized area where the rubber had become

 cracked and leaky.  Apparently a manufacturing defect as there were no

 rough spots or FOD in the tire to cause this.


	


An RV-9A owner at our field had a flat tire on a relatively new tube as well.  He found it while it was parked, so it never became a rolling incident.



When we disassembled it to find the leak, we found that the area where the leak in the tube occurred was immediately opposite the place in the inside of the tire where an "Inspected OK" sticker had been placed... The owner remembered seeing the sticker when he assembled the wheel, but there wasn't much left of it after the tube failed, just a hard lump.



I think it's highly likely that either some combination of the adhesive and label material formed a hard substance when subjected to the repeated heating/cooling cycles that the tires see, or maybe the label disintegrated, and the remaining adhesive just collected all of the random grit in the tire into one place.



So when assembling your wheels, it might be a good idea to check very carefully for inspection stickers inside the tire, and make an effort to remove them and any adhesive residue before putting it all together.



 	  Quote: 	
		   Flying my father's RV-A, N347RV.


	


Must be nice.  



-Rob



---

Rob Prior

rv7 at b4 dot ca

rafael(at)gforcecable.com
Guest

Posted: Wed Sep 02, 2009 12:24 pm Post subject: Flat main tire on takeoff or landing

Last December, I had the right main go out on me on landing on my rv-8A.

Control was not a problem, as I was able to keep the plane going down the

runway.  The only problem was that it was impossible to taxi or move the

plane once it came to a stop.



I found out the hard way the phenomena of splenation [sp], where the tube

rubs against the tire and digs a hole in the tube.  After that, I use plenty

of talcum and keep my tires inflated at 40 psi.  The problem has not

returned.



Cheers,



Rafael



--

flying(at)jeffhove.com
Guest

Posted: Thu Sep 03, 2009 9:56 am Post subject: Flat main tire on takeoff or landing

Thanks Rafael for sharing your experience.  That makes me feel a little 

more confident that landing with a flat isn't too bad.



Sure glad I was at my home airport with the right sized wing-jacks and 

other tools available.  As you said, there doesn't seem to be any way to 

move the plane until after the wheel pant is removed and the tire changed.



Blue Skies,

   Jeff



rafael wrote:

[quote] 

 

 Last December, I had the right main go out on me on landing on my rv-8A.

 Control was not a problem, as I was able to keep the plane going down the

 runway.  The only problem was that it was impossible to taxi or move the

 plane once it came to a stop.

 

 I found out the hard way the phenomena of splenation [sp], where the tube

 rubs against the tire and digs a hole in the tube.  After that, I use plenty

 of talcum and keep my tires inflated at 40 psi.  The problem has not

 returned.

 

 Cheers,

 

 Rafael

 

 --

flying(at)jeffhove.com
Guest

Posted: Thu Sep 03, 2009 4:06 pm Post subject: Flat main tire on takeoff or landing

Unfortunately there is not an easy way to check tire pressure on the RV 

without removing the whole wheel pant which is a lot of screws.  It had 

been checked just two weeks earlier though during a condition inspection.



On this day the tire had looked fine during pre-flight and rolled out of 

the hangar easily and taxied normally.   The deflation happened suddenly 

during the taxi from the run-up area to the active runway.



Interesting tip about the newer style of tubes though.  I'll investigate

that.  Thanks.



Jeff



Larry Helming wrote:

 	  Quote: 	
		   No I haven't and I don't know of anyone.  Sounds like you were lucky not 

 to have lost control.  I suggest you check tire pressure during each 

 flight's preflight inspection.  I know my tires lose pressure with time 

 and flying time and landings.  You might consider the new tubes that 

 cost more but don't lose pressure.  Also, maybe more space between the 

 tire and wheel faring should be considered.  Contact Vans for more info. 

  

  Indiana Larry

 

 On Tue, Sep 1, 2009 at 3:04 PM, Jeff Hove <flying(at)jeffhove.com 

 <mailto:flying(at)jeffhove.com>> wrote:

 

     

     <mailto:flying(at)jeffhove.com>>

 

     Has anyone with a 7A (or other RV) experienced a flat main tire

     during takeoff or landing?  Were you able to keep it on the runway?

      Did the wheel-pant survive?

 

     I had a left main inner-tube fail during the taxi to the runway last

     week and even at a slow taxi it was hard to keep it straight as the

     tire deflated.  Had the tube let go a minute later I'd have been on

     the take-off roll.  The tire was fine and the tube was only 2 years

     old and looked ok except for a quarter-sized area where the rubber

     had become cracked and leaky.  Apparently a manufacturing defect as

     there were no rough spots or FOD in the tire to cause this.

 

     The way the tire bunched up inside the wheel-pant made me wonder if

     the wheel would continue turning and if even full opposite rudder

     and brake would be enough to keep the plane rolling straight had

     this happened at a higher speed.

 

     Thanks,

      Jeff Hove

 

     Flying my father's RV-A, N347RV.

     nics.com/Navigator?RV7-List"

     target="_blank">http://www.matronics.com/Navigator?RV7-List

     href="http://forums.matronics.com/"

     target="_blank">http://forums.matronics.com

                        -Matt Dralle, List Admin.

     =====

 

 

 

 

 

 

 -- 

 In God I Trust.  

 

 *

 

 

 *

av8er2fly(at)peoplepc.com
Guest

Posted: Thu Sep 03, 2009 8:15 pm Post subject: Flat main tire on takeoff or landing

I cut a hole in my wheel pants and put a spring loaded small door that I 

got from ACS. I then went and got a straight pressure gauge from Sears. I 

check mine every two weeks because of crappy tubes that leak. I will be 

changing them next set of tires.

Marrk Rose 137MR

rv7(at)b4.ca
Guest

Posted: Thu Sep 03, 2009 8:24 pm Post subject: Flat main tire on takeoff or landing

On Thu, 03 Sep 2009 12:38:06 -0500 Jeff Hove <flying(at)jeffhove.com> wrote

 	  Quote: 	
		   Unfortunately there is not an easy way to check tire pressure on the RV

 without removing the whole wheel pant which is a lot of screws.  It had

 been checked just two weeks earlier though during a condition inspection.


	


RV pilots at our airport have cut small holes in their wheelpants, and use a valve stem extender that they spin on to the valve stem.  When not checking tire pressures, they plug the holes with metal snap-in hole plugs that fit almost flush to the surface.  It seems to work very neatly and the plugs can be painted to match the wheelpant and be almost invisible.



The top plug in the picture on this page is pretty much the one they're using:

<http://www.stimpson.com/hole_plugs.htm>



I'm pretty sure the extensions they found locally are 6" long, but this is the only example I could find with Google:

<http://www.primetimesolutions.com/Tire-Valve-Extender-9-inch>



-Rob



---

Rob Prior

rv7 at b4 dot ca

hoodcom(at)sbcglobal.net
Guest

Posted: Fri Sep 04, 2009 7:40 am Post subject: Flat main tire on takeoff or landing

I found this site concerning schrader valve  extension.

  

 http://www.ryderfleetproducts.com/cgi-bin/ryderfp/products/srm/oid/46413/erm/product_detail.jsp?utm_source=googlebase&utm_medium=search&utm_campaign=product

  

 wondering how to remove the stem dust cover before  attaching extension?

  

 Bill Hood

 RV7

 90% COMPLETE 50% TO GO

   [quote][b]

Allen Fulmer

Joined: 10 Jan 2006
Posts: 79
Location: Alexander City, AL

Posted: Fri Sep 04, 2009 8:29 am Post subject: Flat main tire on takeoff or landing

I bought one of these but I cannot remember whether it has an end that fits the stem cap or not?  At any rate, it has not been a problem as you can use a nut drive or socket with extension.  

   

HTH,  

   

Allen Fulmer  

RV4 flying  

RV7 wiring  

   

http://www.aircraftextras.com/Valve-ext.htm  

       

From: owner-rv7-list-server(at)matronics.com [mailto:owner-rv7-list-server(at)matronics.com] On Behalf Of Bill Hood

 Sent: Friday, September 04, 2009 10:31 AM

 To: rv7-list(at)matronics.com

 Subject: Re: Flat main tire on takeoff or landing  

  

  

     

I found this site concerning schrader valve extension.  

    

   

    

http://www.ryderfleetproducts.com/cgi-bin/ryderfp/products/srm/oid/46413/erm/product_detail.jsp?utm_source=googlebase&utm_medium=search&utm_campaign=product  

    

   

    

wondering how to remove the stem dust cover before attaching extension?  

    

   

    

Bill Hood  

    

RV7  

    

90% COMPLETE 50% TO GO  

   	  Quote: 	
		    http://www.matronics.com/Navigator?RV7-List 	
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       [quote][b]

_________________
RV7 QB Fuselage
Eggenfellner H6 on orde
N808AF reserved
Alexander City, AL

hoodcom(at)sbcglobal.net
Guest

Posted: Fri Sep 04, 2009 9:14 am Post subject: Flat main tire on takeoff or landing

valve stem extension

  

 try this link,,,sorry

  

  

 http://www.ryderfleetproducts.com/cgi-bin/ryderfp/products/srm/oid/46413/erm/product_detail.jsp?utm_source=googlebase&utm_medium=search&utm_campaign=product

  

 bill hood

   [quote][b]

HCRV6(at)comcast.net
Guest

Posted: Fri Sep 04, 2009 9:44 am Post subject: Flat main tire on takeoff or landing

I've been following this thread for awhile so here's my $0.0002 worth.  I installed Michelin slow leak tubes over three years ago and am now on the second set of tires with the same tubes.  I do a visual check each preflight and remove the front half of the wheel pants once a month or so to check pressure, takes about 15 minutes to do both mains.  So far I have never seen the tire pressure drop by more than one psi per month and it is usually more like one psi in two or three months.  Desser Tire sells the tubes, they ain't cheap but for my in my opinion well worth the cost.



Harry Crosby

RV-6 N16CX, 612 hours



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