[roc-chat] Re: Rockets... FTW! New life for an old Bruiser
- From: Mike Riss <rockt_dude@xxxxxxxxxxxxx>
- To: roc-chat@xxxxxxxxxxxxx
- Date: Sat, 17 Nov 2012 14:36:45 -0800 (PST)
--- On Sat, 11/17/12, Jeff Gortatowsky <indanapt@xxxxxxxxx> wrote:
From: Jeff Gortatowsky <indanapt@xxxxxxxxx>
Subject: [roc-chat] Rockets... FTW! New life for an old Bruiser
To: "roc" <roc-chat@xxxxxxxxxxxxx>
Date: Saturday, November 17, 2012, 1:25 PM
> I have plenty of DD Altimeters. Thoughts?
IIRC, you have a Defy Gravity Control. If so, it has a channel dedicated for
airstarts. It's triggered at a user-defined time after main motor burnout is
detected (default is 2 seconds). Works for staging too!
> Ignitors? I know CTI's have the pellet making then great at airstarts
> and staging the doddle, but are their igniters suitable for low current
> applications. If not, whatcha all using
There's a couple options here, both using any standard low-current ematch: 1)
Dip the ematch in a pyrogen, like Magnalite; 2) Use a Pyrodex pellet (30 or 50
caliber depending on the size of the motor core -- for really big motors, you
might need more than one).
Also, if it's going to get off the pad in a hurry, and/or the airstarts are
"kind of" long, you might want something like a shishkabob skewer or piano wire
or something stiff in the airstart motors to help keep the ematch up by the top
grain.
Mike
--
ROC-Chat mailing list
roc-chat@xxxxxxxxxxxxx
//www.freelists.org/list/roc-chat
Other related posts:
