What's new
  • Please do not post any links until you have 3 posts as they will automatically be rejected to prevent SPAM. Many words are also blocked due to being used in SPAM Messages. Thanks!

Gallery Supersonic ping pong ball

BrainEater

Well-known member
Joined
Mar 19, 2007
Messages
2,820
Location
Calgary
I have successfully constructed a mold for a perfect De Laval nozzle !!!

I took a 38 mm wooden dowel , and drilled right through the center as best as I could.
I then jammed the drill bit in , and used the drillpress as a makeshift lathe....Worked really well ,the shape is there.
I've also cut it at the 'throat' , and re-lathed it smooth , so the mold comes apart.

I'll take my camera to work tomorrow and snap a shot.

Hello Mr. Mach !

:thumb:
 

WolfBane

Well-known member
Joined
Jun 28, 2008
Messages
1,240
Location
new bruinswick
I have successfully constructed a mold for a perfect De Laval nozzle !!!

I took a 38 mm wooden dowel , and drilled right through the center as best as I could.
I then jammed the drill bit in , and used the drillpress as a makeshift lathe....Worked really well ,the shape is there.
I've also cut it at the 'throat' , and re-lathed it smooth , so the mold comes apart.

I'll take my camera to work tomorrow and snap a shot.

Hello Mr. Mach !

:thumb:
:thumb:
 

BrainEater

Well-known member
Joined
Mar 19, 2007
Messages
2,820
Location
Calgary
Oh yea !!!

Check this out :

braineater-albums-vacuum-cannon-picture1978-nozzelmold.jpg


------

Caveat :

I have only base knowledge of the supersonic compression dynamics of De Laval nozzles .
I didn't measure anything here .

It certainly "looks" like any De Laval nozzle I've ever seen , I'm sure it'll be a good start for a ping pong gun !

Haha

:thumb:
 

Latest posts

Twitter

Top