4 and 6 inch are my favorites, you'll like them. We've had 6" sugar powered
rockets to Mach 2.7
On Sunday, December 6, 2020, 08:05:49 PM PST, Bdale Garbee <bdale@xxxxxxx>
wrote:
"Rick Maschek" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender
"rickmaschek" for DMARC) writes:
December 19th test will have the pressure port on the steel nozzle
convergent side. On our 12" sugar motors we had over 4 inches of slag
build up on the bulkheads and put the port there for that reason. The
first two tests of this 8" motor were nozzle down and that's why we
had the pressure port on the bulkhead.