Typically, cardboard-phenolic tubing is enough. Depending on where you're
located it can be purchased from a HPR supplier in the US or UK or phenolic
tubing manufacturer elsewhere ie. it's also used for manufacture of industrial
electrical equipment like winding insulation and whatnot.
http://www.jcrocket.com/body-tubes.shtml
If you're outside the US: you can also try rolling your own or saturating an
existing cardboard tube with a sodium silicate solution or sodium silicate
based muffler putty that's been watered down a bit.
Just remember not to push motor casing temperatures too high if you're using an
al-alloy (eg. 6061-T6 or 6082-T5 or T6) material relying on its temper for much
of its strength.
Troy
-----Original Message-----
From: arocket-bounce@xxxxxxxxxxxxx <arocket-bounce@xxxxxxxxxxxxx> On Behalf
Of Raum
Sent: Friday, February 24, 2023 1:00 AM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Insulator motor
Hi guys,
After experimenting with plastic (3d printed, glass transition around 60
celsius)
model rockets, I found that it is pretty feasible. However between the motor
casing and the plastic body tube there is a pretty good insulator needed. For
38mm and 54mm motors it is enough to use a cardboard tube, but anything
higher, I am not comfortable enough with cardboard. Do you guys have some
recommendations for ‘easy’ to find materials?