75mm CTI / AT forward seal disk compatibility

[kruland]

Sorry for the weird question but my rocketry stuff is a total wreck.

I have an AT 75mm reload and the corresponding case and closures. However, I can only find one forward seal disk in my stash and I don't know if it's AT or goes with my CTI 75mm hardware.

So, if it were for CTI is it compatible with AT hardware & reloads?

Thanks for the help.

 

[thomas]

CTI 75mm has no seal disk, it comes with a phenolic washer, that comes with the reload.
See for example:
http://www.pro38.com/pdfs/Pro75_Instructions.pdfIf you use that with an Aerotech case and AT motor, you will likely destroy it.
The AT seal disk is aluminum with a rim for an o-ring.

AT even recommends using their seal disc with 75mm CTI motors in AT casings:

 

[kruland]

Thanks! that answers my question completely.