Yes Henry, correct, I saw a photo of a 7.5K:bF 'subscale' F-1 engine with
it's exhaust blasting at a test deflector to empirically design the Saturn
5 deflector.
They coated it with layers of volcanic rock. I like the Russians deflector
too, it's also passive in nature needing no cooling water except for maybe
some smaller amounts around the top area of the pad. I like passive things,
fewer things to fail.
Ken
On Fri, Apr 21, 2023 at 8:52 AM Henry Spencer <hspencer@xxxxxxxxxxxxx>
wrote:
On Thu, 20 Apr 2023, roxanna Mason wrote:
It's interesting to note that the aforementioned Saturn 5 deflector was
passive in nature, not a steel plate with 1000's of holes flowing high
pressure water.
So simple it's painful.
Not an entirely trivial design, though -- for example, the angle between
its sides changed at least once during development, to make sure that a
detached shock didn't form above it. (It's an aerodynamic surface in
supersonic flow...)
Henry