Re: [ERPS] reusable capsule

Hi, there was a good capsule spacecraft design, made in Chelomei group, named VA TKS (as a part of a bigger TSK project). Some capsules flew several times, all unmanned. http://astronautix.com/craft/tksva.htm The NPOMash claims it has the complete documentation and is able to adjust the design

Re: [ERPS] H2O2 SSTO

Hi, Kirill Levin developed a good software for modelling orbital rocket launches. It's in the form of Excel spreadsheet, has many existing major rockets as samples, and there is a nice documentation page. http://www.geocities.com/levinkirill/SpaceModel/eng/ Alex __

Re: [ERPS] Armadillo Dec 6, 2003

John, can we have approximate figures for the planned X Prize flight of the Armadillo vehicle? The numbers I currently have are the following: tank volume - 850 gallons tank weight - 1 lb per gallon thrust - 4 engines, 1000 lbf each acceleration time - 95 seconds confirmed Isp - 140 s >From abov

Re: [ERPS] Text of Bush Speech

Hi. --- Donald Qualls <[EMAIL PROTECTED]> wrote: > the CEV. I wonder if that means the Space Station > will be serviced only > by the (then) forty-plus year old Soyuz design > vehicles during that > (minimum) four year hiatus? Or will it be abandoned > in place as soon as > it's completed?

[ERPS] regenerative cooling with peroxide

Hi, is it possible to use peroxide for regenerative cooling of byprop chambers? Say, you have a nice peroxide-kerosine engine, with plenty of HTP in rocket tanks; can you channel the peroxide through the cooling jacket of the engine so that engine won't overheat? How the designers of engines for

[ERPS] peroxide compatibility question

Hi, I'm looking for peroxide compatibility information. I'd like to have as much of it as possible, but I also have some specific questions. How compatible is the copper with the peroxide? What difference for compatibility the stabilized peroxide makes versus unstabilized? Is the tin compatible w

Re: [ERPS] peroxide compatibility question

Hi, I wonder why the Black Knight creators used steel for the tubes, which made the chamber wall of their engines. The steel is certainly more sturdy, than copper, however, the copper is considered the material of choice for the chamber wall because thermoconductivity benefits outweight the disad

[ERPS] economy of scale in rockets: how?

Gentlemen, there is a somewhat theoretical question. It is often assumed that for bigger (liquid) rockets it's easier to get the good mass ratio than for smaller one. Usually one says that the mass of, say, tanks - a major contributor to the rocket dry weight - is proportional to the second power

Re: [ERPS] NASA Looks At Prize Sponsorship

Why it's bad news, Michael? Is anything wrong with ASP? My opinion is that it's much harder to get in 6 years to orbit with 5 people vehicle etc. than to get to 100 km height in about the same time. X Prize was also somawhat more international. But what is your opinion? Alex --- Michael Wallis

[ERPS] liquid air for concentrating HTP?

Hi, Dave is working on the freezer to make concentrated HTP out of lower-grade one, AFAIK. The logic, I assume, according to , is the following: if you have a 30% (or some other lower grade) HTP, and start cooling it, first the water becomes ice, a

Re: [ERPS] liquid air for concentrating HTP?

--- David Weinshenker <[EMAIL PROTECTED]> wrote: > We've considered it, but it looks like the required > quantities > of LN2 would be awkwardly large... especially now > that I'm getting > down to the desired temperatures with mechanical > refrigeration. > (A domestic freezer won't reach -40 to