[AR] Re: Falcon 9 lifetime of 5 flights?

  • From: ken mason <laserpro1234@xxxxxxxxx>
  • To: arocket@xxxxxxxxxxxxx
  • Date: Mon, 23 Mar 2020 16:07:04 -0700

The LEM decent engine was/is an engineering triumph, with a 10/1
throttling ratio made the XLR-99 blush.

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On Mon, Mar 23, 2020 at 4:03 PM Troy Prideaux <troy@xxxxxxxxxxxxxxxxxxxxx>
wrote:

I have recollections of some people here mentioning that pintle injectors
offered deeper throttling capability (with a given finite development
budget)? That’s probably going back to discussions from the early Masten
startup days?



Troy



*From:* arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx]
*On Behalf Of *roxanna Mason
*Sent:* Tuesday, 24 March 2020 9:49 AM
*To:* arocket@xxxxxxxxxxxxx
*Subject:* [AR] Re: Falcon 9 lifetime of 5 flights?



May have answered the question after jogging my aging memory:

In the late 90's at EMRTC New Mexico Tech I conducted firings for TRW
with a pindle at the 40K level with Tom as the project engineer and
Maurice O Brian test tech. Then in 2003 from my home in the Mojave desert I
did loan Tom my 75K LOx/Kero injector as a demonstrator for 6 month. Guess
It stuck.



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On Mon, Mar 23, 2020 at 3:38 PM William Claybaugh <wclaybaugh2@xxxxxxxxx>
wrote:

Ken:



They use a pintle injector because when they designed it that was far
cheaper than a flat plate.



Bill




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