If I go the welded route, I was thinking that some sort of rotary fixture would be a good idea but I hadn't thought of using the lathe. I think mine goes down to 25 RPM. Interesting idea.
-Bob On 02/25/2014 03:12 PM, Monroe L. King Jr. wrote:
For welding if you have a lathe anyway set up a tig static with a small depth adjustment only. Turn the leadscrew with a stepper. A little practice you get the right welding speed a little more and you can set the depth. Start the rotation hit the juice and set your depth let it do a full rotation and shut off the juice. Not much experience required that way. Just saying-------- Original Message -------- Subject: [AR] Re: Astraseals vs. welding From: Norman Yarvin <yarvin@xxxxxxxxxxxx> Date: Tue, February 25, 2014 11:10 am To: arocket@xxxxxxxxxxxxx On Tue, Feb 25, 2014 at 08:32:06AM +1100, Troy Prideaux wrote:Depends on the potential energy the RTV will be exposed to. Scaled found that "silicone" when saturated in N2O was found to be impact sensitive. I'd imagine that if it was a static environment and the potential energy exposure was confidently low, you'd likely be ok to utilize it.If enough nitrous can diffuse into silicone to make it an explosive, I'll bet it swells up a lot in the process, too -- which might make it a better seal momentarily, but likely would ruin it in the long term. (And is there anywhere in all of rocketry which is a "static" enough environment that it's safe to use an impact sensitive explosive? Maybe somewhere in ground support equipment, but even there...) -- Norman Yarvin http://yarchive.net/blog
