[ERPS] Anything happnin with PDE's?

I'm new to the list and wonder what's the state of development of PDE's. [I don't suppose any ERP members are working on them?] http://www.galcit.caltech.edu/EDL/projects/pde/pde.html has the most information that I have been able to find for detonation motors. [Is there a better one?]

[ERPS] Rocket entrepreneurs are wonderful.

> http://www.armadilloaerospace.com/n.x/Armadillo/Home/News?news_id=251 > I am enjoying the peroxide engine development reports from John Carmack at Armadillo Aerospace. I am a child of the fifties and back then, we were sure that by the turn of the century, everyone would be able to routine

[ERPS] tank slosh baffle comment

Ah yes, this sounds like the orthodox type of slosh baffle, fixed rings inside the tank wall. From my experience with ballast tanks on a ship, where sloshing produces undersirable rolling movement of the entire ship: Seems like four vertical partition baffles would work well. Looking down f

[ERPS] slosh balls

Henry Spencer said > < assume by "balls" you mean "floats".) >> I agree. Floats appear to me to be ineffective slosh control. [no matter what nasa did. Nasa did a lot of stuff wrongly for CATS :-] I think that floats knocking around in a sloshing propellant tank would be an un-nerving and

[ERPS] flight stability

Henry S writes: > For example, a disturbance that is too big and too quick for the control > system to catch without a noticeable lurch can be dealt with much more cleanly > if its size is > well-known and there's a bit of advance warning, so you can feed in the > correction in advance. An ad

[ERPS] balloon tanks

Henry S said: > << for > pressure-fed engines, typically makes excellent structure with little or > no added stiffening. (Witness the classical Atlas, whose tanks are just > sheet-metal balloons, with essentially no strength of their own.)>>> "Excellent structure"? I doubt it. If nasa did it, it

[ERPS] amateurs reach 77 miles high

In a message dated 5/21/04 3:00:47 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: > http://www.arrl.org/news/stories/2004/05/19/1/?nc=1 This article is short on tech details. Anyone know the specs on their solid motor? Like what was the burn time? The overall rocket size was 21' by 10" an

[ERPS] Amateur space shot burn time

http://news.bbc.co.uk/2/hi/science/nature/3724841.stm says the burn time of CSXT's 10" diameter solid motor was 14 seconds. I'm guessing but it sounds like some end-burning had to be cast in the grain for that long of a burn duration. members.aol.com/beanstalkr/project/

[ERPS] Armadillo, flight video

http://www.armadilloaerospace.com/n.x/Armadillo/Home/News?news_id=260 Nice job! In a few weeks, the Armadillo flight test vehicle went from 4 motors with differential thrust steering to one large motor with exhaust vane steering! And they flew some hops to prove it works. That's progress. Joh

[ERPS] Soybean fuel?

In a message dated 7/12/04 3:00:24 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: > I could find no further information on soybean monoprop Somehow, I doubt anyone *ever* will find further info on this one. "IF it sounds too good to be true..." members.aol.com/beanstalkr/project/ ___

[ERPS] Commercial Space Launch Amendments Act

In a message dated 10/8/04 3:00:30 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: > It seems the House-Senate conference committee on the Commercial Space > Launch Amendments Act of 2004 (HR 3752) has added wording that makes > it's passage unlikely. Even it's author, Rep. Dana Rohrabacher