Jon,
Lol... And I probably should've read the article first. Such as life...
But yea, that makes more sense using that as the 'first stage'.
Joe
On Thu, Jan 30, 2020, 9:11 AM Jonathan Goff <jongoff@xxxxxxxxx> wrote:
Should've read what Nels said first...
On Thu, Jan 30, 2020 at 9:10 AM Jonathan Goff <jongoff@xxxxxxxxx> wrote:
Joe,
Spin launch isn't trying to get to orbital speeds on the ground -- that
would be really hard to do with existing materials, and would be a horrible
thermal environment. The wired article mentions ~2.2km/s barrel exit speed
(which is similar to what I had heard before myself), which is a bit higher
than traditional munitions, but on the lower end of the range for things
like naval railguns. It's enough that if their ballistic coefficient is
high enough, they may not slow down that much, and it basically knocks of
the gravity/drag losses, and has the rocket already going maybe 1-1.5km/s
downrange at ignition (so they only have to come up with ~6km/s to get to
orbit).
~Jon
On Thu, Jan 30, 2020 at 7:19 AM Joe Bowen <joe.b.bowen@xxxxxxxxx> wrote:
Yea but the long range gun folks aren't trying to get to orbital
velocities.
Joe
On Thu, Jan 30, 2020, 6:55 AM Philip Hahn <everphilski@xxxxxxxxx> wrote:
Long range gun launch folks do this all the time, it doesn't have to be
a show-stopper. You hit a wall of heat exiting the barrel and spend a long
time cooling off - you can play some tricks with TPS selection to take the
brunt of it.
philip
On Wed, Jan 29, 2020 at 10:11 PM Troy Prideaux <
troy@xxxxxxxxxxxxxxxxxxxxx> wrote:
Not much mention of the aero and thermal loads on the vehicle(s) with
the highest velocity part of the flight profile happening in the densest
part of the atmosphere?
Troy
*From:* arocket-bounce@xxxxxxxxxxxxx [mailto:
arocket-bounce@xxxxxxxxxxxxx] *On Behalf Of *Ian M. Garcia
*Sent:* Thursday, 30 January 2020 2:47 PM
*To:* Ben Brockert <wikkit@xxxxxxxxx>; arocket@xxxxxxxxxxxxx
*Subject:* [AR] Spinlaunch article
Because I know Ben Brocker is a fan and doesn’t want to miss a single
article.
https://www.wired.com/story/inside-spinlaunch-the-space-industrys-best-kept-secret/
I was the space industry best kept secret, until now!
ian
