What advantages do they claim by printing the TCAs? I’ve been involved in
additive manufacturing since around 2007 and have done a least one contract
study for a major player evaluating its use in bi-propellant motors. There were
significant advantages demonstrated in smaller, highly detailed, high value
parts that were manufactured using traditional subtractive methods. That did
not translate to components such as TCAs and other larger critical components
on a production basis. In one particular LOX/Kerosene motor we traded, the
pintle injector cost was reduced by almost an order of magnitude. On the other
hand, the cost of the TCA doubled and the production cycle time increased by
almost two orders of magnitude.
Maybe we missed something or they’re using a better printer.
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
<http://www.cesaronitech.com/> http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
From: arocket-bounce@xxxxxxxxxxxxx <arocket-bounce@xxxxxxxxxxxxx> On Behalf Of
Ben Brockert
Sent: Sunday, December 29, 2019 6:30 PM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Aviation person?
I thought we were talking about Rocketlab recovering their nine printed
chambers. It’s unlikely they’d be bothering if they’d chosen to advance
Bell/Masten/XCOR/etc conventionally manufactured aluminum engines, rather than
building them one grain of dust at a time.
On Sunday, December 29, 2019, Anthony Cesaroni <anthony@xxxxxxxxxxx
<mailto:anthony@xxxxxxxxxxx> > wrote:
That’s an interesting analytical approach but seems limited to TCAs built using
additive manufacturing. 😊
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
<http://www.cesaronitech.com/> http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
From: arocket-bounce@xxxxxxxxxxxxx <mailto:arocket-bounce@xxxxxxxxxxxxx>
<arocket-bounce@xxxxxxxxxxxxx <mailto:arocket-bounce@xxxxxxxxxxxxx> > On Behalf
Of Ben Brockert
Sent: Sunday, December 29, 2019 5:25 PM
To: arocket@xxxxxxxxxxxxx <mailto:arocket@xxxxxxxxxxxxx>
Subject: [AR] Re: Aviation person?
It’s a fairly quick bit of math to find that the launch rate of an expendable
system with printed thrust chambers ends up being constrained by the total
number of printers in existence in the world (and really, by the number of
printers you can use within the artificial constraints of it*r).
That number is about one rocket’s worth of chambers per week. Distributed
across the four or five significantly capitalized companies that are doing
printed thrust chambers.
On Sunday, December 29, 2019, Anthony Cesaroni <anthony@xxxxxxxxxxx
<mailto:anthony@xxxxxxxxxxx> > wrote:
With high value payloads perhaps. That seems like an expensive logistics
operation added to small and expensive launch system. Just an opinion but
perhaps focusing on designing and producing an inexpensive, simple and reliable
booster in vehicles this size and forgoing recovery would make more sense from
an operational cost standpoint. Or perhaps not. A few successful missions
should confirm it either way.
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
<http://www.cesaronitech.com/> http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
From: arocket-bounce@xxxxxxxxxxxxx <mailto:arocket-bounce@xxxxxxxxxxxxx>
<arocket-bounce@xxxxxxxxxxxxx <mailto:arocket-bounce@xxxxxxxxxxxxx> > On Behalf
Of Joe Bowen
Sent: Sunday, December 29, 2019 12:34 PM
To: arocket@xxxxxxxxxxxxx <mailto:arocket@xxxxxxxxxxxxx>
Subject: [AR] Re: Aviation person?
https://spaceflightnow.com/2019/08/12/rocket-lab-to-begin-booster-recovery-experiments-later-this-year/
Electron is going to try it and it's something that's been done in the past.
Joe
On Sun, Dec 29, 2019, 11:01 AM Keith Henson <hkeithhenson@xxxxxxxxx
<mailto:hkeithhenson@xxxxxxxxx> > wrote:
Someone I have known for a long time asked me about using a remotely
controlled helicopter to aid recovering the SpaceX fairings.
It is a topic about which I don't know enough even to be dangerous.
But I said I would try to find someone who knew enough to critique his
ideas.
If there is such a person on this list, and you are interested, I can
pass on this guy's email.
Keith