[AR] Re: Estimating Coefficient of Discharge (Cd)
- From: "" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender "JMKrell@xxxxxxx" for DMARC)
- To: arocket@xxxxxxxxxxxxx
- Date: Tue, 16 Sep 2014 00:24:12 -0400
Sorry, sent before I was finished.
In a message dated 9/15/2014 9:16:24 P.M. Pacific Daylight Time,
dmarc-noreply@xxxxxxxxxxxxx writes:
In a message dated 9/15/2014 8:21:33 A.M. Pacific Daylight Time,
monroe@xxxxxxxxxxxxxxxxxx writes:
Sure, it's not that big a deal if your not trying to get all the
performance you can get. But that's the main reason to switch to hybrid,
performance right? Otherwise just stick with a solid. It's been a while
but as I recall self pressurized was about equal to a standard solid in
performance. (in the real world all things considered)
Performance? The nitrous hybrid was not developed for performance. Self
pressurized systems are not equal to solids, at least not the PlasmaJet
solids with delivered Isp's of 225 -238.
Krell
> -------- Original Message --------
> Subject: [AR] Re: Estimating Coefficient of Discharge (Cd)
> From: "Anthony Cesaroni" <acesaroni@xxxxxxxxxxx>
> Date: Mon, September 15, 2014 7:45 am
> To: <arocket@xxxxxxxxxxxxx>
>
>
> Why wouldn’t they? The dominating design consideration in terms of
oxidizer feed is still the Dp across the injector and you're still
incorporating
a monopropellant as an oxidizer.
>
> Anthony J. Cesaroni
> President/CEO
> Cesaroni Technology/Cesaroni Aerospace
> http://www.cesaronitech.com/
> (941) 360-3100 x101 Sarasota
> (905) 887-2370 x222 Toronto
>
>
> -----Original Message-----
> From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx]
On Behalf Of Monroe L. King Jr.
> Sent: Monday, September 15, 2014 10:22 AM
> To: arocket@xxxxxxxxxxxxx
> Subject: [AR] Re: Estimating Coefficient of Discharge (Cd)
>
> Right, but not the same issue as self pressurized hybrids. HTP hybrids
are not self pressurized and don't have pressure issues that a self
pressurized hybrid would. Correct?
>
> Monroe
>
> > -------- Original Message --------
> > Subject: [AR] Re: Estimating Coefficient of Discharge (Cd)
> > From: "Anthony Cesaroni" <acesaroni@xxxxxxxxxxx>
> > Date: Mon, September 15, 2014 7:07 am
> > To: <arocket@xxxxxxxxxxxxx>
> >
> >
> > The HTP hybrid will have the same issue and the same solutions.
Classic, head end injected hybrids all have the same issues and it worsens
exponentially as they upscale.
> >
> > Anthony J. Cesaroni
> > President/CEO
> > Cesaroni Technology/Cesaroni Aerospace http://www.cesaronitech.com/
> > (941) 360-3100 x101 Sarasota
> > (905) 887-2370 x222 Toronto
> >
> >
> > -----Original Message-----
> > From: arocket-bounce@xxxxxxxxxxxxx
[mailto:arocket-bounce@xxxxxxxxxxxxx] On Behalf Of Monroe L. King Jr.
> > Sent: Monday, September 15, 2014 9:49 AM
> > To: arocket@xxxxxxxxxxxxx
> > Subject: [AR] Re: Estimating Coefficient of Discharge (Cd)
> >
> > Yeah, not worth my time. I was working on a manifold idea for the
Bloodhound motor at one time for a full pressure test. HTP hybrid wont have
the same issue. Adding a bit of AP to the HTPB (5%) was also an interesting
solution for that motor.
> >
> > Yeah, I just can't get into the hybrids. Not my thing unless they are
pressurized versions.
> >
> > Monroe
> >
> > > -------- Original Message --------
> > > Subject: [AR] Re: Estimating Coefficient of Discharge (Cd)
> > > From: "Anthony Cesaroni" <acesaroni@xxxxxxxxxxx>
> > > Date: Mon, September 15, 2014 6:02 am
> > > To: <arocket@xxxxxxxxxxxxx>
> > >
> > >
> > > It's not for the most part unless you have a pressure dependent fuel
or the fuel decomposition is independent and separate from the
oxidizer/fuel main stage, i.e. a staged combustion hybrid.
> > >
> > > Anthony J. Cesaroni
> > > President/CEO
> > > Cesaroni Technology/Cesaroni Aerospace http://www.cesaronitech.com/
> > > (941) 360-3100 x101 Sarasota
> > > (905) 887-2370 x222 Toronto
> > >
> > > -----Original Message-----
> > > From: arocket-bounce@xxxxxxxxxxxxx
[mailto:arocket-bounce@xxxxxxxxxxxxx] On Behalf Of Monroe L. King Jr.
> > > Sent: Monday, September 15, 2014 1:03 AM
> > > To: arocket@xxxxxxxxxxxxx
> > > Subject: [AR] Re: Estimating Coefficient of Discharge (Cd)
> > >
> > > 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
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