[roc-chat] Re: Rockets... FTW! New life for an old Bruiser
- From: JACK GARIBALDI <jackgaribaldi@xxxxxxx>
- To: "roc-chat@xxxxxxxxxxxxx" <roc-chat@xxxxxxxxxxxxx>
- Date: Sat, 17 Nov 2012 16:48:20 -0800
Nope I am taking the weekend off first one in awhile
Jack
Sent from my Mil Spec IPhone 4S
On Nov 17, 2012, at 4:21 PM, "Jeff Gortatowsky" <indanapt@xxxxxxxxx> wrote:
>
> >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
>
> LOL. I *DO* and it's been dead to the world for years. I posted several times
> here but could not find anyone willing to, or perhaps able to, repair it. I
> literally never got to use it. I bought I think one of the first runs.
>
> I recall seeing Kurt or others using 1/8 dowels or something like that in the
> air starts... memory fails however. Sure sure... dipped low current
> e-matches. But whose and from whom? I also recall him tapin little pieces of
> D13 blue thunder to the ignitor. That might have been for clustering. One use
> det cord anymore... or is that totally verboten now?
>
> Jack you havin' a Black Friday Sale? Just askin' :D
>
>
> ---------------------------------------
> Jeff Gortatowsky, Redondo Beach, CA | Twitter: JeffGortatowsky | Yahoo:
> indanapt
> Facebook: http://www.facebook.com/jeffgortatowsky
> Blog @ http://skepticalastronomer.wordpress.com
>
> "(Scientific) Skepticism is not a set of beliefs, it is a set of methods for
> asking questions about reality." -- Doctor Steven Novella
> From: Mike Riss <rockt_dude@xxxxxxxxxxxxx>
> To: roc-chat@xxxxxxxxxxxxx
> Sent: Saturday, November 17, 2012 2:36 PM
> Subject: [roc-chat] Re: Rockets... FTW! New life for an old Bruiser
>
> --- 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
>
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