Please correct me if I'm wrong but I think you can have choked flow through
the nozzle if the chamber pressure is only about 20 psig (at sea level). My
experience with hybrid motors is that the flame is opaque and I can't
recall ever seeing mach diamonds (in motors that had chamber pressures
around 300-500 psig).
Paul
On Thu, Jan 21, 2021 at 8:17 PM Evan Daniel <evanbd@xxxxxxxxx> wrote:
By far the simplest way to do this, in my opinion, is a relief valve
on your run tank. If you go this route, you'll also want a dump valve,
since your tank won't depressurize on its own.
Evan Daniel
On Thu, Jan 21, 2021 at 10:44 AM Edward Wranosky <edwardcw@xxxxxxxxx>
wrote:
temperature regulate your nitrous oxide. Remove ALL the variables you can.
That is from Todd Moore - owner of Sky Ripper Systems.
Another piece of advice is to go the route that Mark (MCS) started and
numbers to get an instinct for what's likely to work. Sorry I cannot find
Edward
On Wed, Jan 20, 2021 at 3:08 PM <mark.spiegl@xxxxxxxxx> wrote:
Jack Hanna wrote:
So, how to math?
Here's an N2O hybrid spread sheet if you want to play around with
the original to properly credit the author:
http://www.spiegl.org/rocket02/HDASv1.6.xls
--MCS