From:	Marc Renouf renouf@********.com
Subject:	Launched and Air-timed Grenades
Date:	Wed, 3 Mar 1999 16:59:44 -0500 (EST)

On Wed, 3 Mar 1999, Paul J. Adam wrote:

> OICW counts how many times the grenade has spun :) Since you know the
> rifling twist, that's apparently quite accurate enough.

Really? How does it count the turns?

> The Swiss AHEAD antiaircraft shell uses three coils at the muzzle: two
> measure shell velocity, the third inductively programs a time fuse to
> burst just short of the target, thus 'shotgunning' it with a cloud of
> tungsten shrapnel.

The AHEAD system kicks ass. You gotta give those guys credit for
being crack-headed enough to pull it off.

> Or you just use 'best guess' as to muzzle velocity and set a timer :)

That's typically how I run it.

> INS in a grenade? Doubt it...

My sentiments exactly. Though if a grenade can tell how many
times it has spun...

Marc