Fuel flow does vary some with oxidizer flow, but it's not exactly linear. There will always be some O/F ratio shift. But nitrous hybrids have a pretty broad peak on the Isp vs. O/F graph because of the monopropellant energy in the nitrous. In practice if you are using nitrous you aren't worried about performance enough for it to matter.
On Sun, 14 Sep 2014 22:02:31 -0700 "Monroe L. King Jr." <monroe@xxxxxxxxxxxxxxxxxx> wrote:
How efficient is that control on most hybrids? I understand regression rate working in favor of the process. I do admit I have not run any calculations for regression vs oxidizer flow. Is it close enough to make that much up? If so it might rejuvenate some interest in hybrids for me. I'll have to look into it I guess I may have overlooked something there. My thinking was it wasn't enough.Monroe-------- Original Message -------- Subject: [AR] Re: Estimating Coefficient of Discharge (Cd) From: "Ray Rocket" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender "ar0cketman@xxxxxxxxx" for DMARC) Date: Sun, September 14, 2014 8:24 pm To: arocket@xxxxxxxxxxxxx -------------------------------------------- On Sun, 9/14/14, Monroe L. King Jr. <monroe@xxxxxxxxxxxxxxxxxx> wrote:> Which is a big reason I don't much care for the way self pressurized hybrids fly. I know they can't possibly be efficient. (Unless fuel flow is controlled by oxidizer flow)Yeah, that's how hybrids work. Fuel regression rate is controlled by oxidizer mass flux. Ad Astra, Ray
