Turbine air start -- too cold?

That's because the comment is classic Riley Clueless, Vaughn. Modern 100#
propane tanks are rated for _at least_ 250# _working_ pressure. Each tank
must be tested two twice that working pressure and one out of every 500 is
tested to four times working pressure. Pressure relief valves for cooking
gas tanks are usually set for 375 psi. The compressed air that goes into the
tank doesn't get nearly as hot as his overactive imagination says it does.
In fact, the outside of the tank is quite cool to the touch at 280 psi.

"Vaughn" wrote in message
...

"Richard Riley" wrote in message
news
Propane tanks are normally rated for 250 LBS.

That rating is normally at 120 degrees. 280 PSI air is probably a lot
hotter than that. It's been too long since I've done ideal gas law
equations, but I seem to remember 250 psi air getting to 300 or 350 F.
At a temperature higher than it's rating, a tank is weaker than it's
rating.

You lost me here. In my experience, 250# air can be any temperature
you
want it to be.

Vaughn

"Richard Riley" wrote in message
news
mercy snip

I will be filtering this thread.

All of that BS for one, solitary piece of useful information...

In article , Juan Jimenez says...


"Richard Riley" wrote in message
news
mercy snip

I will be filtering this thread.

All of that BS for one, solitary piece of useful information...


Gee Richard that's what we say about ANN ..lots of BS and little info LOL!!!
Sorry couldn't help my self.Back to lurk mode

Chuck S RAH-15/1 ret

Sean Trost wrote:
Juan
I believe that N1 is related to the velocity of the airstream
introduced. Which is good. But not related to the ignition problem
Now You have said that you have an excellent spark and good fuel. the
only other thing you need for start is the right airflow. or volumn.
Dont know about your engine specifically but most everything else runs
right around 14 to 1 on the ratio wise.

Actually, jets are a different beast from piston engines. Between
about 25:1 and 50:1 is normal, even for lightoff fuel flow.
Stoichiometrically correct combustion is too hot.

From: "Juan Jimenez"
Date: 1/14/2005 08:30 Central Standard Time
Message-id:


"Colibri" wrote in message
...

My thought is that the air impinges on the turbine wheel, not the
compressor. So that cold air has nothing to do with lighting the mixture.

But the cold air goes through the engine after it hits the turbine wheel...

After the turbine stage is the exhaust pipe. The turbine stage is that last
moving part of a jet engine.

Dan, U.S. Air Force, retired

"ChuckSlusarczyk" wrote in message
...
In article , Juan Jimenez
says...


"Richard Riley" wrote in message
news
mercy snip

I will be filtering this thread.

All of that BS for one, solitary piece of useful information...

Gee Richard that's what we say about ANN ..lots of BS and little info
LOL!!!
Sorry couldn't help my self.Back to lurk mode

Monkey see, monkey do. I guess it's true that retards feed from each other.

"Richard Riley" wrote in message
...

All he has to do is google "propane air pressure rating fatigue" and
he'll get most of what I gave him in my post. As obnoxious as he is,
his kids should grow up with a father.

All the results of that search that are relevant to using them as air tanks
talk about 20# thin metal LP tanks, you dunce, not about 100# steel tanks.

Do us all a favor and go play with your legos or something. Look, there's
Chuck in the sandbox! Go play! Shoo!

I stand corrected. Thanks Jim. Learned somthing new everyday.
Sean

Jim Carriere wrote:
Sean Trost wrote:

Juan
I believe that N1 is related to the velocity of the airstream
introduced. Which is good. But not related to the ignition problem
Now You have said that you have an excellent spark and good fuel. the
only other thing you need for start is the right airflow. or volumn.
Dont know about your engine specifically but most everything else runs
right around 14 to 1 on the ratio wise.


Actually, jets are a different beast from piston engines. Between about
25:1 and 50:1 is normal, even for lightoff fuel flow. Stoichiometrically
correct combustion is too hot.

In article , Juan Jimenez says...

Monkey see, monkey do. I guess it's true that retards feed from each other.

Guess your right Hmmm let's see jim zoom campbell and jaun jaminiz (spelled
wrong on purpose) :-)

See ya

Chuck (I designed my own plane ,did you?) S RAH-15/1 ret

On 15 Jan 2005 09:18:40 -0800, ChuckSlusarczyk
wrote:

In article , Juan Jimenez says...

Monkey see, monkey do. I guess it's true that retards feed from each other.

Guess your right Hmmm let's see jim zoom campbell and jaun jaminiz (spelled
wrong on purpose) :-)

See ya

Chuck (I designed my own plane ,did you?) S RAH-15/1 ret


You noticed that, too....??

John