A question,  What is causing the flats - what is found after inspecting the tube / tire.

The reason for the question is that in some experimantals calling for tubeless tires,  guys are inserting tubes for the belts and suspenders thing and flats become quite common.  The culprit is sheared valve stems due to tire spin on the rim.

The talk of underinflated tires failing suggests to me that underinflation might be the root cause and spinning of the tire resulting in valve stem damage might be the actual cause of the failure.

Lowell

----- Original Message ----- From: "Mark Ravinski" <mjrav@comcast.net>
To: "Lancair Mailing List" <lml@lancaironline.net>
Sent: Sunday, February 12, 2006 6:59 AM
Subject: [LML] Re: 235 tires


I've had a half dozen or so tire failures also using the Lancair supplied Chin's.  Mostly caused by low pressure.
On two occasions at the start of the Sun 100 race, I held the plane on the ground and accelerated to about 90 mph before liftoff to help gain speed faster.
Both times I had a tire go flat on the next landing.  Twice was enough,  I decided that wasn't worth it.

No uncontrollability resulted from landing with the flat tires however. It was no worse than landing in crosswinds.  I could even taxi off the active.

Mark Ravinski
N360KB  1364 hrs