How to make a medium delay into a short delay

How to make a medium delay into a short delay

Post by Gizmo Da » Mon, 26 May 1997 04:00:00



A rocket dealer once explaned how to convert an Aerotech medium delay to
short delay by drilling out some of the delay material. Now, he did say to
only twist the drill bit by hand.... Any coments on what size bit and how
deep.
Thanks
Gizmo Dave

 
 
 

How to make a medium delay into a short delay

Post by Jerry Irvi » Sat, 31 May 1997 04:00:00



Quote:

> A rocket dealer once explaned how to convert an Aerotech medium delay to
> short delay by drilling out some of the delay material. Now, he did say to
> only twist the drill bit by hand.... Any coments on what size bit and how
> deep.
> Thanks
> Gizmo Dave

5/32" diameter and 1/32" deep for each second of delay removal.  Remove on
ejection end.

Jerry

--

Box 1242, Claremont, CA 91711 USA
Opinion, the whole thing.

 
 
 

How to make a medium delay into a short delay

Post by Bob Kapl » Tue, 03 Jun 1997 04:00:00



Quote:


>> A rocket dealer once explaned how to convert an Aerotech medium delay to
>> short delay by drilling out some of the delay material. Now, he did say to
>> only twist the drill bit by hand.... Any coments on what size bit and how
>> deep.
>> Thanks
>> Gizmo Dave

> 5/32" diameter and 1/32" deep for each second of delay removal.  Remove on
> ejection end.

1) Jerry, weren't you the person who pointed out that it just doesn't matter
which end of the delay column you drill out? Of course, on expendables, only
the ejection end is accessable.

2) This is a violation of the safety code unless recommended by the
manufacturer. In the past I've seen one manufacturer that recommended this
(Synerjet and its predecessor Ravenna), and a couple that did it for me
(NCR, Rocketflite). In fact, Synerjet made the cleverest design tool to do
this job for you. I still have one, and it wouldn't be that hard for someone
with a small machine shop to reproduce at bargain prices.

        Bob Kaplow      NAR # 18L       TRA # "Abort, Retry, Fail?"