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# Thread: World's highest speed limit - photo

1. ## The Following 2 Users Say Thank You to Altair For This Useful Post:

NortonDommi (May 16, 2022), nova_robotics (May 14, 2022)

2. I sometimes drive at Mach .10 but mostly hold it down to .09 but out on the open highway I might let it creep up to Mach .12 or .13 if the wife isn't paying attention to how fast I'm going which is rarely these days.

3. ## The Following 2 Users Say Thank You to Frank S For This Useful Post:

NortonDommi (May 16, 2022), Toolmaker51 (May 15, 2022)

4. I had my wife up to about Mach .14, on a motorcycle. She stopped screaming about .12 but was holding on tight.

Long before we were married!!!! I figured after that she as a keeper.

But I have not had her over M .12 since we married.

5. ## The Following 2 Users Say Thank You to hemmjo For This Useful Post:

Frank S (May 14, 2022), Toolmaker51 (May 15, 2022)

6. Must be getting old. Spent time out figuring those into MPH.

7. Have to remember that Mach numbers are a ratio of an objects speed to the speed of sound. The speed of sound varies with the type and density of the material it is traveling though. I know that I did not measure the temperature and humidity of the air. My Mach numbers are just estimates

This is a handy link to have for things like this.

8. Originally Posted by hemmjo
Have to remember that Mach numbers are a ratio of an objects speed to the speed of sound. The speed of sound varies with the type and density of the material it is traveling though. I know that I did not measure the temperature and humidity of the air. My Mach numbers are just estimates

This is a handy link to have for things like this.
It was a fun diversion, comparing myself to you and little lady or Frank S streaking across Texas.
Been to his place once; drove fast enough to overshoot it by 3 hours!
In a hybrid!
Q: How big is Texas?
A: Big enough to name different places the same!

9. Drove to Texas once, to visit wife's family in Houston. Just driving along the highway, "trying" to keep pace with traffic. That is when we Mach .12. Texas is indeed a big place. Next time we went for niece's wedding, we flew down... in an airplane

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