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Supersonic ping pong ball

BrainEater

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May 20, 2022
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Happy Friday everyone !

I know some of you know what I'm up to.
I want to make a ping pong ball go so fast it melts when it hits air.
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For those that don't :
In 2013 a paper was published by Purdue university about making a ping pong ball go faster than sound.
This paper : (see PDF)
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I have made a proper testbed for supersonic and maybe hypersonic ping pong balls.

I have pics.


overview2.jpg

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I have to do some resizing for the rest of the pics.
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Here's the rundown :

I had 2 test fires of 99% subsonic (750 MPH or so).
But not one iota faster....I was not getting the pressure required for supersonic flow.
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I'll get more pics up in a bit !

:D
 

Attachments

  • A_Supersonic_Ping_Pong_Gun.pdf
    242.1 KB · Views: 3



BrainEater

New member
LPF Site Supporter
Joined
May 20, 2022
Messages
13
Points
3
The current world record for this is 976 M/s or Mach 2.8

I've designed this cannon for 100 PSi/100 C helium. Using that gas, the math says exit velocity of 4470 MPH/Mach 5.6/ 2 kilometers per second !
here's a pic of the pressure assembly :

tank2.jpg

The tank is heated, and rated to 150PSi/100C.
That ASCO solenoid is what replaces the laser I wanted.....
 




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