Dang I never saw this before, follow that link
down the page and you will see the scroll pack motor.
It's real easy to see where we made our mistake in that style of cat pack.
Robert
At 12:29 PM 9/20/2016, you wrote:
Here is a quote from where we got the Idea for the rolled screen. He would not give me much in the way
of details but it doesn't take much imagination to figure out what they were doing. Two major differences
between their motor and our, we were only using 300psi at the injector and theres was a massive
engine driving a car for four seconds whiles ours was 450lbf for 60 seconds. He said his engine
would never last that long.
"A rocket engine of a radial screen catalyst design, rather than the traditional packed disk design, was installed with the ability to produce the equivalent of 8,000 horsepower at about 600 psi inlet pressure with 90% concentration by weight hydrogen peroxide."
http://www.vetechnet.com/rocketcar.htm
Robert
At 01:58 PM 9/16/2016, you wrote:
Ok Pauls random H2O2 CAT thought  thought....
You start with flat sheets of catalyst material then punch round parts out of them..
stack the round parts...
This is a constant area cross section cat pack.
You can do some optimization by having finer screens at the beginning, but mostly constant area.
The wall area  where you have to put anti channeling rings for a cat pack of area A gets worse asÂ
you go to a smaller cat pack ie 2PiR/pir^2
Now suppose that you build the cat pack as a hollow spool....
The Catpack material is rectangular (no waste) and is wound around the spool...
The as the H2O2 goes from liquid at the center to Gas at the outside the area of the cat pack increases
So one would expect a lower pressure drop. One can increase the length of the tubular section without increasing
 the anti channeling area....Â
Now getting the gas turned around and going in the Correct direction may be hard...
On Fri, Sep 16, 2016 at 11:13 AM, George William Herbert <<mailto:george.herbert@xxxxxxxxx>george.herbert@xxxxxxxxx > wrote:
Tantalum-Tungsten (Ta-W10) is being explored for rifle barrel liners with apparently near zero wear / indefinite lifetime
I don't know how analogous that wear is to peroxide cat beds but it's something to look at...
Sent from my iPhone
> On Sep 16, 2016, at 9:37 AM, Henry Vanderbilt <<mailto:hvanderbilt@xxxxxxxxxxxxxx> hvanderbilt@xxxxxxxxxxxxxx> wrote:
>
> I see that, among other combinations, you can buy platinum-iridium clad niobium wire. I have no idea how chemically suitable that would be, but I would think it'd be fine for 99% peroxide temperature-wise.
>
> <http://www.anometproducts.com/content/precious-metal-clad-wire>http://www.anometproducts.com/content/precious-metal-clad-wire
>
> There are all sorts of other combinations available, including clad tantalum-tungsten wire. Anyone knowledgeable care to comment whether anything there is potentially interesting for HTP cat-packs?
>
>> On 9/16/2016 7:18 AM, Henry Vanderbilt wrote:
>> Just out of curiosity, anyone have a source and price on pure
>> platinum/palladium mesh or wire? On plated mesh or wire? It occurs to
>> me that it might be overall cheaper to bite the bullet and pay, say,
>> $10K per engine, than to put more time and effort into finding a cheap
>> alternative for HTP cat-packs when that's already soaked up so much time
>> and effort to no avail.
>>
>> Henry
>>
>>>Â Â On Thu, Sep 15, 2016 at 1:33 PM, William Claybaugh
>>>Â Â <<mailto:wclaybaugh2@xxxxxxxxx>wclaybaugh2@xxxxxxxxx
>>>Â Â Â Â The 98% peroxide thrusters developed--but not used--for X-37
>>>Â Â Â Â used woven screens in more or less the conventional manner used
>>>    for silver. They worked w/o incident in testing.
>>>
>>>Â Â Â Â Bill
>>>
>>>
>>>Â Â Â Â On Thursday, September 15, 2016, Randall Clague
>>>Â Â Â Â <<mailto:rclague@xxxxxxxxx>rclague@xxxxxxxxx
>>>Â Â Â Â <javascript:_e(%7B%7D,'cvml','<mailto:rclague@xxxxxxxxx> rclague@xxxxxxxxx');>> wrote:
>>>
>>>      ERPS tested platinum/palladium beads in 1994. The beads
>>>Â Â Â Â Â Â work fine in an ashtray, as ERPS demonstrated during their
>>>      talks at Space Access '94 and '95. (In '95 they scorched
>>>Â Â Â Â Â Â the tablecloth, and they were asked not to repeat their
>>>Â Â Â Â Â Â demonstration.)
>>>
>>>Â Â Â Â Â Â Video of a test ERPS did with a platinum/palladium bead
>>>Â Â Â Â Â Â catalyst pack shows that the exhaust starts out white, goes
>>>      clear, then turns tan. Post-test inspection showed that
>>>      many beads were crushed or absent. The tan exhaust was
>>>Â Â Â Â Â Â interpreted as pulverized catalyst departing the engine, and
>>>Â Â Â Â Â Â their hypothesis was that the beads lost structural
>>>Â Â Â Â Â Â integrity due to thermal shock.
>>>
>>>Â Â Â Â Â Â -R
>>>
>>>Â Â Â Â Â Â On Wed, Aug 24, 2016 at 11:46 PM, William Claybaugh
>>>Â Â Â Â Â Â <<mailto:wclaybaugh2@xxxxxxxxx>wclaybaugh2@xxxxxxxxx> wrote:
>>>
>>>Â Â Â Â Â Â Â Â I'm pretty sure that Platinum / Palladium cat beds are
>>>Â Â Â Â Â Â Â Â proven to work just fine and last forever running 98%
>>>Â Â Â Â Â Â Â Â Peroxide.
>>>
>>>Â Â Â Â Â Â Â Â Bill
>
Attachment:
scroll-1.jpg
Description: Binary data
