Same question as Lloyd - what is the material? I would either machine a
boss port or if it's aluminum/steel, weld on a male AN fitting of the
appropriate material. Definitely not NPT... - too much of a risk of
stripping out the threads in the expensive engine.
For the pressure sensor, I've used #10-32 Beswick fittings with an
o-ring directly into the side of the engine and had no leaks. Using a
real counterbore instead of an endmill on the #10-32 seal surface fixed
the o-ring blowout problems I had originally. And of course, use 1/16
inch capillary tubing and a pducer with very low dead space.
-Bob
On 12/22/2015 07:29 PM, Lloyd Droppers wrote:
Nice chamber, what is the material? I know that the sintered and infused steel and some of the DMLS stainless steel can be brazed, and a brazed in tube is the lightest connector if the material is brazable.
Otherwise I think probably a straight thread fitting of the AS-5202 style is probably your best bet for the fuel connection. For the chamber pressure there are some M5 and 10-32 fittings from swagelok or mcmaster #5885T33 that used a flat rubber gasket, you can replace that with a copper crush seal gasket for high temperature applications.
Lloyd
On Wed, Dec 23, 2015 at 2:05 PM, Paul Breed <paul@xxxxxxxxxx <mailto:paul@xxxxxxxxxx>> wrote:
Looking for suggestions on how to terminate fluid and pressure
sensor connections in a 3D printed chamber.
The blobs of metal for the fuel connection and the chamber
pressure sensor are significant parts of the chamber weight.
https://pbs.twimg.com/media/CW3wUbqUAAA5Ciu.jpg:large
this is the flight weight chamber fully accounted including cat
pack lid and internal parts will have a
thrust to weight of > 110
Paul
