Paul, it would seem to me peroxide would benefit most from engine
management. Especially peroxide/gasoline
Also a little nitromethane would not hurt :)
I think after some test flights you could get simultaneous propellant
depletion even closer with better management.
Especially if you have a rocket engine rather than a rocket motor.
-------- Original Message --------
Subject: [AR] Re: Closing the loop on rocket engines
From: Paul Breed <paul@xxxxxxxxxx>
Date: Thu, December 10, 2015 7:57 am
To: arocket@xxxxxxxxxxxxx
Getting simultaneous propellant depletion at clost to optimum ISP is what
matters.... it does not matter if the earlier part of the burn might be
slightly off on O:F the steep part of the curve is at the end.
On Wed, Dec 9, 2015 at 9:21 PM, David Weinshenker <daze39@xxxxxxxxxxxxx>
wrote:
On 12/09/2015 08:59 PM, Monroe L. King Jr. wrote:
I'm not suggesting using car O2 sensors I know they wont work. I'm
looking for something that will work.
Those optical sensors are not the same as O2 sensors.
Engine management in cars is what I know I am speaking generally in that
direction based on what I know about that.
I see plenty of reasons to want better control over the engine.
Yes, mixture control is a good reason.
A valve can be controlled, pressure/rpm of the power turbine and many
other factors.
If you want to do closed-loop control of rocket O/F ratio, there may be
usable methods other than direct flame-chemistry sensing - e.g., using
the pressure drops across the injectors as a proxy for flow measurement,
and then "closing the loop" to maintain a desired relationship between
those signals.
-dave w