Nozzle for Kosdon 29/150 C-slot

J Blatz · Jan 9, 2018

I have several Kosdon G40 loads I want to burn, but I lost the only nozzle I had for this load.

Anybody out there have one? Or would anyone like to make one for me? I have the specs, somewhere, I think.

H_Rocket · Jan 9, 2018

Reach out to Dan Patell, he made some for me.

patelldp · Jan 9, 2018

H_Rocket said:
Reach out to Dan Patell, he made some for me.

I can make them but I don't know what throat the G40 needs, unfortunately.

J Blatz · Jan 9, 2018

Dan - I'll poke through my specs at lunch.

jsdemar · Jan 9, 2018

patelldp said:
I can make them but I don't know what throat the G40 needs, unfortunately.

Kosdon G40 nozzle is 0.1695 (#18 drill). I don't know the nozzle length, but you could back that off from other dimensions.

The grain is 5" long with 1/4" wide slot half way through the diameter.

patelldp · Jan 9, 2018

Pretty sure the nozzle is 1 long. No step.

jsdemar · Jan 9, 2018

patelldp said:
Pretty sure the nozzle is 1” long. No step.

1" sounds right. Here's the KBA 29mm assembly instructions which show the same case system used by the G40 C-slot.
https://www.aerotech-rocketry.com/c...KBA_Instructions/29-150-250_kba_in_k08001.pdf

If you make a 0.221" nozzle also, the case could use those KBA loads.

J Blatz · Jan 9, 2018

Thanks John, you are correct. 0.1695" throat.

J Blatz · Jan 10, 2018

Hey Dan, please PM on this, would like to proceed.

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