[roc-chat] Re: BP for Deployment of Main Question
- From: Steve Battaglia <stevebotag@xxxxxxxxxxxxxx>
- To: "roc-chat@xxxxxxxxxxxxx" <roc-chat@xxxxxxxxxxxxx>
- Date: Fri, 9 Dec 2011 16:52:29 -0800
Thanks guys... 4F BP it is.... I did some tests with pyrodex with crappy
results.....
S. Battaglia
310-339-2717
Sent from my Rotary iPhone...
On Dec 9, 2011, at 2:01 PM, Mike Riss <rockt_dude@xxxxxxxxxxxxx> wrote:
> --- On Fri, 12/9/11, Steve Battaglia <stevebotag@xxxxxxxxxxxxxx> wrote:
>
>> Any difference between pyrogen/pyrodex and BP?? tried using pyrogen for
>> ejection but it seems to burn slower that BP... any truth to that??
>
> Pyrogen is typically used for motor ignition. Pyrodex is not the same as
> pyrogen, although Pyrodex pellets can be used to augment an ignitor. Note
> that the pellets aren't the only form Pyrodex comes in.
>
> Usually for ejection, some kind of powder that generates a lot of gas is
> used. However, this needs to be balanced against the amount of heat that is
> also generated. BP is a traditional method since it's somewhat readily
> available and produces predictable, consistent results. Pyrodex powder can
> be used, but does not burn the same as BP. It needs some kind of
> containment, nor is it a "gram-for-gram" substitution for BP. Other powders
> may also work, but have similar constraints, or else they burn too fast or
> too slow for the containment methods commonly used for BP.
>
> Mike
>
>
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