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Re: Small diameter front tires - some conclusions! Part 1

To: land-speed@autox.team.net
Subject: Re: Small diameter front tires - some conclusions! Part 1
From: John Szalay <john.szalay@worldnet.att.net>
Date: Wed, 04 Dec 2002 23:22:15 -0500
At 05:19 PM 12/4/02 -0500, you wrote:
>Saw one of these puppy's in Chino, CA. The bead area was about 2" thick, one 
>HEAVVVY tire. Strange silver coloring.
>John
>----- Original Message -----
>Subject: RE: Small diameter front tires - some conclusions! Part 1
>> Jim;
>>
>> I see on pg 36 of the Goodyear Aviation catalog that an SR-71 takes a 27.5  
>x  7.5 tire with a 22-ply rating. I wonder what its speed rating is?
>> Hmmmmm.......
>>


>  IIRC:  the "Strange silver coloring" is due to the addition of
powdered aluminum designed to raise the heat resistance of the 
rubber compound, because of the air friction at speed.
        (It soaks into the whole airframe)


 Maximum ground speed rating on SR-71 tires  239 Knots  (275 MPH)

   source:  SR-71A-1 manual (  the Dash one)
   http://www.sr-71.org/blackbird/manual/1/index.htm

   http://www.sr-71.org/blackbird/manual/appendix/a2-3.htm


and "liftoff" speed is around  210Kts  (242 MPH)
touchdown is around 175  Kts  (202 mph)

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