All,
Thank you very much for the responses. There has already been a lot of good
learning here. Below are some of my responses and then some additional
questions in no particular order:
The Ethanol tank is currently aluminum.... Last year's senior design team
acquired it and the thought was that the Ethanol will not be present in the
tanks long enough to cause issues. I am inclined to replace it with a
proper material since I am not sure what the effects of Ethanol residue on
aluminum is over time. I am not sure on the material for the LOX - I will
look it up when I get home. I believe the tank was previously used for
oxygen in industry.
For the Ethanol and LOX manifolds, I have a line coming in to a 4 way port
with a pressure relief valve, a solenoid, a bleed/purge valve, and soon a
burst disc.
- What is the different between a purge valve and a bleed valve, unless
synonymous?
- Is a bleed/purge valve a manual valve? It seems that this defeats the
purpose of remote system pressure relief for disarming.
- Please please what is the different between a pressure relief valve and a
purge valve?
- Is the solenoid attached to the top of the LOX and Ethanol tanks venting
to atmosphere intended to be the primary means of remote pressure relief to
achieve disarming? Is this what I would call my vent valve?
Ben, you stated:
"* You're going to want purges to clear out the lines to the engine
before and after running. Typically they come from above the tank
press valve, through an orifice and a solenoid valve and a check valve
or two, and are injected on the downstream side of the engine run
valve."
On the statement: You're going to want purges to clear out the lines to the
engine before and after running."
Here is "purges" a noun as in a purge vent, or a verb as in the process of
purging?
On the statement: Typically they come from above the tank press valve,
through an orifice and a solenoid valve and a check valve or two, and are
injected on the downstream side of the engine run valve."
- Is "they" referring to the verb of purging?
- What is the "tank press valve"?
- Is the "orifice and a solenoid valve" possibly part of the main LOX
pressurant line, upstream from the LOX tank inlet?
- When you state "and are injected on the downstream side of the
engine run valve"
are you referring to injecting the LOX pressurant gas into the downstream
side of the engine run valve?
- What is the engine run valve?
Lastly, how bad is it if the team wants to mount the engine to the stand
such that the exhaust outlet is parallel to the ground (mounted
horizontally). I have concerns about fuel pooling following testing.
Thank you many many times for the information. This has been a huge help so
far.
I will post pictures of the test stand and components tonight and link them
to this thread for those interested.
This is a very great group of people.
Best,
Kyle
On Wed, Apr 20, 2016 at 2:23 PM, Wyatt Rehder <wyatt.rehder@xxxxxxxxx>
wrote:
Russ,
What flavor? LN2 ice creme is literally one of my favorite things...
I've had some pretty good luck with caramel.
Wyatt Rehder
On Wed, Apr 20, 2016 at 12:29 PM, Russell Blink <russ@xxxxxxxxxxxx> wrote:
I did just make some LN2 ice cream in our work kitchen and got a bitlight headed, just turned on the AC and all was good.
(some ventilation is good)On Behalf Of Ben Brockert
Russ Blink
Exos Aero
-----Original Message-----
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx]
Sent: Wednesday, April 20, 2016 11:57 AMlungfull of pure helium or nitrogen won't kill you.
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Portland State Aerospace Society
You're not going to suffocate by taking a sniff of nitrogen. Even a full
robert.steinke@xxxxxxxxx> wrote:
On Thu, Apr 21, 2016 at 12:44 AM, Robert Steinke <
On Wed, Apr 20, 2016 at 10:13 AM, Paul Mueller
<paul.mueller.iii@xxxxxxxxx>
wrote:
(swish it around, blow it out with dry air until you can't smell the
alcohol smell anymore on the outlet).
If you are sniffing the outlet you absolutely MUST use dry AIR as Paul
says, not dry NITROGEN so you don't suffocate yourself. I thought
this was worth some capital letters.
