Hi Chuck,
I've flown many Aerotech 38 mm motors with thin wall PVC for liner. Butt joints
not sealed are a recipe for burn through of motor casings. While I have mad my
own steel nozzles with a shoulder for the liner to slip over, I've also fired a
few with used Aerotech nozzles. I use card stock for casting tubes that I roll
and then insert into short pieces of the thin wall PVC to keep them round. When
the the propellant solidifies, I push the grains out and tear off some of the
rolled card stock to make insertion into the PVC motor liner.
Rick
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From: Chuck McNeice II <capthaywire@xxxxxxxxx>
Date: Thu, 20 Jun 2019 17:48:51 -0400
Subject: [sugpro] 38 mm PVC liner for LOKI
I would like to use a PVC liner in my 38 mm LOKI 740 motor with sorbitol
bates grains. The LOKI liner slips over the nozzle by about .25 inch. Can I
just butt the PVC liner to the nozzle or will I need to reduce the ID of
the PVC pipe? If so what is the best way to reduce the ID without a lathe
or other sophisticated tooling? Any other tips would be greatly appreciated.
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Date: Thu, 20 Jun 2019 22:54:51 +0000 (UTC)
From: "Art" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender "rocket877" for
Subject: [sugpro] Re: 38 mm PVC liner for LOKI
If you're using 1 inch, thin wall PVC pipe you should be able the remove some
of the ID with a sharp knife held at an angle and not taking too deep a cut.
Of course the liner needs to have a clean, straight edge to start with.
Alternatively, an extra O-ring like the one the Loki nozzles use and a little
compression fit might also work.
Mind you I have all the hardware but I've only used it with certifies Loki
reloads..... so far.
Art ApplewhiteNew to sugar
-----Original Message-----
From: Chuck McNeice II <capthaywire@xxxxxxxxx>
To: sugpro <sugpro@xxxxxxxxxxxxx>
Sent: Thu, Jun 20, 2019 4:49 pm
Subject: [sugpro] 38 mm PVC liner for LOKI
I would like to use a PVC liner in my 38 mm LOKI 740 motor with sorbitol bates
grains. The LOKI liner slips over the nozzle by about .25 inch. Can I just butt
the PVC liner to the nozzle or will I need to reduce the ID of the PVC pipe? If
so what is the best way to reduce the ID without a lathe or other sophisticated
tooling? Any other tips would be greatly appreciated.
------------------------------
