Compensating Nozzle, Public Notice

I seem to have stumbled across a simple, inexpensive expansion
nozzle that compensates for variations in Pc/Pa.
Running 60-100 psi air through an expansion ratio of 100+,
the flow stays attached at the point predicted. The unit
is based on aerospike methods applied to a single throat.
The single throat unit has assymetric thrust which will require
the units to be operated in pairs for proper thrust alignment.

I will be mailing test units to a number of friends in the rocket
engine business for testing and use if they want. This posting
is in public archives to state that I am giving, not selling the idea
to several companies. I do not have the resources at this time
to make a business of developing, protecting, and marketing
the concept. I will take my profit in bragging rights and
credibility if the nozzles turn out to be useful.

The test units cost me a few dollars each, which is affordable
for me without financial compensation. The units are tiny
and plug into a quick disconnect air hose for observation
of flow patterns.

At this time I intend to send them to friends in Mojave, Santa Clara,
Phoenix, and Huntsville. You can open the package and try the
units without any financial obligation, present or future. They should
arrive in the next couple of weeks.

My email is still fried, so contact is phone, gmail, or here in public.
My other friends in the business need to let me know if they are
interested.

John Hare
15 March 2006

Great idea. Why not post a drawing?

redneckj wrote:
I seem to have stumbled across a simple, inexpensive expansion
nozzle that compensates for variations in Pc/Pa.
Running 60-100 psi air through an expansion ratio of 100+,
the flow stays attached at the point predicted. The unit
is based on aerospike methods applied to a single throat.
The single throat unit has assymetric thrust which will require
the units to be operated in pairs for proper thrust alignment.

I will be mailing test units to a number of friends in the rocket
engine business for testing and use if they want. This posting
is in public archives to state that I am giving, not selling the idea
to several companies. I do not have the resources at this time
to make a business of developing, protecting, and marketing
the concept. I will take my profit in bragging rights and
credibility if the nozzles turn out to be useful.

The test units cost me a few dollars each, which is affordable
for me without financial compensation. The units are tiny
and plug into a quick disconnect air hose for observation
of flow patterns.

At this time I intend to send them to friends in Mojave, Santa Clara,
Phoenix, and Huntsville. You can open the package and try the
units without any financial obligation, present or future. They should
arrive in the next couple of weeks.

My email is still fried, so contact is phone, gmail, or here in public.
My other friends in the business need to let me know if they are
interested.

John Hare
15 March 2006

Sounds interesting John- I'm assuming that we're one of the addresses in
Mojave? If not, we'll beat you up at Space Access

Doug Jones, XCOR Rocket Plumber

"Doug Jones" wrote in message
...
redneckj wrote:
I seem to have stumbled across a simple, inexpensive expansion
nozzle that compensates for variations in Pc/Pa.

Sounds interesting John- I'm assuming that we're one of the addresses in
Mojave? If not, we'll beat you up at Space Access

Doug Jones, XCOR Rocket Plumber

Actually the only address in Mojave. I'm only sending them to people
that I consider friends, and that should have some reason to believe
I'm serious.

I won't make Space Access this year. Financially over extended.

"dan" wrote in message
oups.com...
Great idea. Why not post a drawing?

The physical test unit makes sense as soon as you plug the
quick disconnect into an air hose. At 60 psi you can feel
the flow at various points with your fingers. The sample
units cost me a few bucks each including postage. Hot fire
test units will be much more expensive.

I have consistently
failed to get ideas across in print or in quick sketches.
I have about a dozen friends I'm sending units to. Since
the idea is to put the concept into the public domain, one
of them will put something coherent on the web at some point.