Saturday, May 2, 2015

Printing 5000 Pounds

A few years ago, I designed a regen cooled thrust chamber in the 5000 pound thrust class.   Lawrence Livermore National Lab printed the design shown below and I outfitted it for testing.

You can check out additional photos here:

Wednesday, February 11, 2015

PR56 Igniter Open Source

Just a note that a few months back I posted "the source" for the PR56 igniter that I've tested with GOX/kerosene.

There is a dimensioned drawing of the igniter body as well as a detailed write-up that includes parts lists and operational notes.  If you make one or use it as inspiration, I'd love to hear about it via email or comment.

I'm planning on revitalizing the blog over the next few weeks, so stay tuned.

Monday, June 23, 2014

A bigger valve

Here is a larger version of an actuated valve assembly.   The first version is based around a 1/4" Swagelok valve (SS-4P4T).  This version mates a 3/8" SwageLok 1/4 turn plug valve (SS-6P6T or B-6P6T) to a Hitec Standard size servo.

There are two printed parts:

Shaft Coupler -
Yoke -

These are the fasteners needed:

qty 4      8-32 x 1/2"" Socket Head Cap Screw, McMaster-Carr 92196A194 
qty 4      #8 Flat Washer, McMaster-Carr 96659A103
qty 2      4-40 x 1.75" Socket Head Cap Screw, McMaster-Carr 92185A128 
qty 2       #4 Flat Washer, McMaster-Carr 96659A101 

Wednesday, November 27, 2013

Testing the New Chambers

Just a quick note that testing is proceeding with the new Printed (3D printing, DMLS, additive manufatured) chambers.   The cobalt alloy turns an interesting green color when it gets warm.

Monday, September 30, 2013