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Your Increment sizes


mabuse00

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This has probably been discussed a lot, but anyway:

 

What increment sizes (compressed of course) have you succesfully used on your rockets, maybe we can exchange some examples.

Since one can save a lot of time using bigger increments I'm curious where one starts pushing his luck...

 

 

I had no problems using for example

 

- on 10mm whistle rockets @8000psi, 2%wax: 8mm, -> 0,8id

 

 

- on 15mm BP nozzleless @ 6000psi, pressed dry: 8mm, -> ~0,5id

 

 

- on 19mm BP Endburners @4500psi, pressed dry: 6mm, -> ~0,3id

 

 

(I've never tried to maximize them yet)

 

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I dont really mess with many smaller motors anymore but the 1lb (19mm) motors get a heaping teaspoon for their increments, all types and they all get 4500psi.

 

3lb (25mm) motors get 2 heaping teaspoons and all motor types still get 4500psi.

 

Measuring an actual pressed increment height would be a pain.

Edited by NeighborJ
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I use a spoon from some infant formula can and it's been working well for me for the last 10 years.
I only do 1# and 3# motors; for 1# I use 1 spoon/addition, the 3# takes 2 spoons.
My spindles tend to be skinny for BP rockets.

It works well I and never bothered to change what works for me.

10 to 12 additions is what it takes in average for my nozzleless BP and I find this acceptable.

With each such spoon addition, I get around 1/2 of the diameter after pressing.
How I know this? I opened some pressed motors and the additions are visible.

I did try the "lazy route" once, using 2 spoons for 1# but the CATOs quickly sent me back to the "right way".


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I use a spoon from some infant formula can

 

 

Hahahaha... we a resourceful bunch if nothing else. How old is the baby? :D

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Richtee, you've got me :) They are 14 and 15 now. Time flies...

Amen. My babies now have babies :D

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Measuring an actual pressed increment height would be a pain.

A pen and a line on the rammer before pulling the tool from the press is quickly done.

 

 

So 1/2 diameter...

 

 

For measuring the amount while working I use can-spoons to, I've got a set intented fur reloading gun cartridges, only the spoons are to small for 1lb and bigger.

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