58Skylane wrote:Well, maybe we can have some fun in the hanger this winter and do some mythe busting? Just got to come up with some kind of a testing contraption!!

Get out the treadmill!

Tadpole wrote:

58Skylane wrote:Well, maybe we can have some fun in the hanger this winter and do some mythe busting? Just got to come up with some kind of a testing contraption!!

Get out the treadmill!

That would work. How about a belt sander??

tcj,

Okay, go out to your hangar, or a local maintenance facility, and lift the wheel ASSEMBLY for a standard type light aircraft, complete with BRAKE DISC.

Now, lift a "standard" 8:00 X 6:00 TIRE.

Now, tell me which one weighs more.

I MIGHT be able to buy your argument for very large tires, such as Goodyear blimp tires, but even there it's a stretch.

By the way, if you properly inflate your tires, this is NEVER an issue, regardless.

MTV

Our company chartered a King Air to take us home for the weekend. While taxiing for departure Friday night the pilot inadvertantly clipped a couple of runway lights with the propellor... and continued to take off. It created a vibration/shutter on take off. At 10,000 ft the pilot thought the vibration indicated a problem and returned to xxx. Upon landing we discovered that two of the propellor blades were missing 8-10 inches of length.

mtv wrote:tcj,

Okay, go out to your hangar, or a local maintenance facility, and lift the wheel ASSEMBLY for a standard type light aircraft, complete with BRAKE DISC.

Now, lift a "standard" 8:00 X 6:00 TIRE.

Now, tell me which one weighs more.

I MIGHT be able to buy your argument for very large tires, such as Goodyear blimp tires, but even there it's a stretch.

By the way, if you properly inflate your tires, this is NEVER an issue, regardless.

MTV

Yes, I know a lot of airplane wheels hubs and brakes together weigh more than the tire on that wheel. I don't have the math knowledge to calculate the momentum of the tire versus the wheel. Thats why I said, "It depends..." It is just a theory of mine anyhow.

If you can spin a tire on the rim just from it's own rotating inertia, then it doesn't stand a chance of decelerating the entire aircraft without spinning on the rim. I've changed many a flat spotted tire from the brake being locked on dry pavement, that didn't even slip on the rim. I would have to see one slip from locking brakes in the air to believe it. Even completly flat, as long as the bead is still seated, I don't think it can be done. Darn things are hard to get off of them rim when changing them.

If you are worried about tire slippage on the rim install bead locks....that's what the low tire pressure racers do.
HC

I am some what reticent to admit this but Mr. Scout, et/al were correct. I checked the tires this morning and they were in dire need of air (FLATSPOT?). I got them correctly inflated and taxied around a while. Then the first TO with absolutely no vibration shutter.
Problem solved!
Thanks everyone!
Bill

I dont know about aircraft tires... but road racing tires that are left on the car under inflated feel "lumpy" even after being inflated to the proper pressure..

this phenomenon goes away after a you get some heat in them\a few laps.



glad you solved your problem.... dosent get any cheaper then a couple pounds of air!

cheerios2 wrote:I dont know about aircraft tires... but road racing tires that are left on the car under inflated feel "lumpy" even after being inflated to the proper pressure..

this phenomenon goes away after a you get some heat in them\a few laps.



glad you solved your problem.... dosent get any cheaper then a couple pounds of air!

Our race team transports the race bike on what we call in transit tires. Just for the reason explaned above.

I am going to agree with MTV seeing how tires can wrap up on pavement and also when braking the momentum of the air plane stoped by brake discs that momentum is still transfered to the tires contacting the ground still a certain amount of wrap in the rubber so spinning the tire and tube from the tire free spinning sounds like a long shot if that happens sounds like a problem before that happened and not the cause.