Hallo Rick.
how are you? I hope everything ok.
I will be at L.A. for 3 or 4 days, next Friday 31 until Tuesday sept. 4, then I
will go back to Mexico, but, I would like to know if FAR have any event next
weekend, I would like to assist to event if it is possible.
with regards
Luis
________________________________
De: arocket-bounce@xxxxxxxxxxxxx <arocket-bounce@xxxxxxxxxxxxx> en nombre de
Rick Maschek <dmarc-noreply@xxxxxxxxxxxxx>
Enviado: miércoles, 25 de abril de 2018 10:15 a. m.
Para: Arocket List
Asunto: [AR] Subject: Re: Solid rocket insulation, yet again
I know I mostly just do 'sugar' motors but in regards to liners and motor
cases, we use extruded 6061-T-6 aluminum 1/8" wall, more often than not out of
round. In our 4" motors, I mostly use 'recycled' liners from friends commercial
AP phenolic liners from 98 mm motors. They are a VERY LOOSE fit in the 4" motor
case. I use no grease but do allow combustion gases to pass around the liner on
the bulkhead and nozzle ends at start up. I have done that with the same 'used'
liner in the same motor case several times. Perhaps it works because sugar
burns cooler than AP or because I try to keep pressures under 600 psi.
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