You mention “smallest core”: are you going for constant velocity through
all the grains, or a couple steps?
Weird to say, but congrats on not firing it. There are many projects
where’d they get go fever and say “ah well we’ll just fire it with one less
grain, it will be pretty close”.
On Sunday, December 18, 2022, Rick Maschek <dmarc-noreply@xxxxxxxxxxxxx>
wrote:
Test firing was scrubbed, grain #5, the bulkhead grain with the smallest
core and the last one to be cast showed some casting tube debonding. Eric
slit the casting tube and we peeled it off. The Good news is that the
entire grain looked good, no cracks and only a couple of tiny voids (like
small bubbles). Surprisingly, considering it has the smallest core, this
was the hardest mandrel to remove with Eric having to pound on the aluminum
motor tube to remove it. The grain was very solid.
We are discussing how to repair it or if we make a new one.
On Sunday, December 18, 2022 at 10:43:55 AM PST, Daniel Kirk <
dk54321@xxxxxxxxx> wrote:
Can't wait to see the video!
On Sun, Dec 18, 2022 at 12:27 AM <dustin@xxxxxxxxxxxxxxx> wrote:
Your aren't going to static test it in that truck bed are you ?
Just kidding, I couldn't resist.
All the best,
Dustin
On 2022-12-16 09:23, Rick Maschek wrote:
Tomorrow may be the make-or-break day for Sugar Shot.
We will static test our 12" (300mm) five grain S-26,500 KNSB motor
with a total impulse of 355,000 Nsec
Finished 9' (2.7m) long motor case being transported to FAR
Rick
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