German 88 with base extension

[Bonnex]

This drawing originated in the Armament Research Department (ARD). ARD was responsible for a considerable amount of enemy ammunition exploitation during and after the war.

 

[TimG]

Bonnex,

Any explanation as to what purose the appendage is for?

TimG

 

[Bonnex]

Bonnex,

Any explanation as to what purose the appendage is for?

TimG

Not yet Tim. I thought I would go through some old HEC reports to see if I could find the answer. I thought it could be to do with filling the vortex behind a shell (which causes drag) to improve velocity but the extra weight involved in the attachment would surely offset any benefits.

 

[HAZORD]

That is one funky looking projectile!

 

[Nabob]

I think there are two reasons for such attachment:
Reducing drag in flight, just like You wrote, and increasing the area of the bottom, area x pressure = force = velocity.
I can't imagine what pain it would be for mass production.

Thanks for showing.
Bob

 

[Falcon]

Being handed that drawing is sure to run any machinist's day.

Not to mention, that would be extremely expensive to produce for any possible benefits gained. If it really worked, I suppose all projectiles today would have them.