" The two engines of Europa's first stage are indeed Atlas engines build in
license by Rolls Royce "
Specifically the licensing was between Rocketdyne, who designed the engine,
and RR.
The main difference between the RR hardware was the straight conical nozzle
vs the more efficient Rocketdyne
design parabolic 'Bell'.
Ken
On Fri, Apr 28, 2023 at 12:28 AM Bruno Berger <dmarc-noreply@xxxxxxxxxxxxx>
wrote:
Yes, Flugwerft Schleissheim is a nice museum. The main museum in Munich
city has also some nice artifacts. The exhibition has been renovated
lately, not to the good though in my opinion.
The two engines of Europa's first stage are indeed Atlas engines build in
license by Rolls Royce (The outside ones, not the central sustainer).
Bruno
Am 28.04.2023 um 07:53 schrieb Ben Brockert:
Photos below:
The “Deutsches Museum Flugwerft Schleißheim” outside Munich is mostly an
aircraft museum, but has a few interesting rocket parts at the very end.
One is an Ariane 5 motor casing that has been cross sectioned, it was the 7
segment version. I placed a 1 euro coin on it for scale, 23.25mm/0.915in in
diameter. According to the plaque, the sections were held together by a
“clevis-tang joint” with 180 pins, and that they were formed on a
“counterroller flow-turning machine” from a 58mm thick blank.
They also have a nearly complete Europa rocket, which you can practically
climb inside of. Not a particularly successful program, but still
interesting to see the hardware up close. You definitely get the feeling
that the Blue Streak first stage builders got a real good look at an Atlas
at some point.
The museum is easily reached by a 20 minute train ride from Munich and a
1.5km walk that goes through the local palace grounds, no need to have a
car.
On Friday, April 28, 2023, Henry Spencer <hspencer@xxxxxxxxxxxxx> wrote:
On Fri, 28 Apr 2023, John Dom wrote:
Ariane 5 APCP boosters have been unsegmented. Cast in one piece. Saw the
vertical casting setup in France which proved big...
Sure you're not thinking of the P80 first stage for Vega? The Ariane 5
boosters are segmented -- three segments, joined at the launch site
(originally bolted together, although midway through the program I believe
they switched to welding them together). Vega's P80 is basically a single
Ariane 5 segment, although with a composite casing instead of a steel one,
and for quite a while it was the world's largest (operational) unsegmented
solid motor.
I do not know about coming Ariane 6's fabrication details. Nor about
their internal geometries.
The Ariane 6 solids are identical to the P120C enlarged first stage built
for the Vega C upgrade of Vega (and since it flew last summer, it now holds
the largest-unsegmented record).
The Shuttle boosters were segmented for ship transportation (size!) I
read at the time.
Not ship, rail -- an SRB segment is about the largest load that can be
carried on the US rail network. (Long ago I visited the Cape, and while
going from one place to another nearby, happened to see a railroad siding
full of the special railcars used to carry the SRB segments. They looked
like tank cars at first glance, until you noticed the NASA logos and the
labels...)
Henry