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Pat
As this color photo shows, other than some shock diamonds, the H2O2/Kerosene exhaust is pretty much invisible: http://content.answers.com/main/cont...Blackarrow.jpg And since you couldn't even see shock diamonds... Come on Pat, the evidence is pretty strong that *this* vehicle is just peroxide monoprop, not HTP/RP-1. All the people I know who've actually done work with peroxide rocketry say it looks just like what they've seen with peroxide monopropellant work, and not like what you see with a peroxide/RP biprop. ~Jon |
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![]() Jonathan Goff wrote: And since you couldn't even see shock diamonds... Come on Pat, the evidence is pretty strong that *this* vehicle is just peroxide monoprop, not HTP/RP-1. All the people I know who've actually done work with peroxide rocketry say it looks just like what they've seen with peroxide monopropellant work, and not like what you see with a peroxide/RP biprop. I don't know if they'll reply, but I've contacted them to ask. Pat |
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In article ,
Pat Flannery wrote: If it was just running pure peroxide, I think you'd see a lot more steam; here's a photo of a German Me-163A using just hydrogen peroxide decomposition for propulsion... Depends enormously on how pure the peroxide is, whether there are any other ingredients (don't forget that the Me163 peroxide was catalyzed by a trickle of permanganate solution, not a solid catalyst bed), and not least, what the ambient humidity is. With high-grade peroxide, solid catalysts, and a dry environment, the exhaust is quite invisible. Yes, indeed. Best thing since DC-X. Imagine if that program had continued to be funded. That one had a real problem with frying its rear end on landing. A very minor one, kept under control with a bit of industrial ablator. -- spsystems.net is temporarily off the air; | Henry Spencer mail to henry at zoo.utoronto.ca instead. | |
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![]() Henry Spencer wrote: Depends enormously on how pure the peroxide is, whether there are any other ingredients (don't forget that the Me163 peroxide was catalyzed by a trickle of permanganate solution, not a solid catalyst bed), and not least, what the ambient humidity is. With high-grade peroxide, solid catalysts, and a dry environment, the exhaust is quite invisible. Since it may be of interest to any chemists in the group, here's what T-stoff, C-stoff, and Z-stoff consisted of in a chemical sense. (T-stoff and Z-stoff were used in the Me-163A; T-stoff and C-stoff in the operational Me-163B fighter) T-stoff : 80% Hydrogen Peroxide plus Oxyquinoline or Phosphate as a stabilizer, and the remainder water. C-stoff: 57% methanol + 30% hydrazine hydrate + 13% water, with small amounts of either cupro-potassium cyanide or copper oxide added as a stabilizer. Z-stoff: An aqueous solution of either sodium or calcium permanganate (the Germans used both during the war) Since we're doing "stoffs" here, here's the others: http://www.warbirdsresourcegroup.org/LRG/fuels.html I have also seen liquid oxygen referred to as "saurstoff". There's a nifty website devoted to the German hydrogen peroxide motors he http://www.walter-rockets.i12.com/walter/walter.htm And data on Black Arrow (which used the same kerosene/H2O2 as Blue Origin is going to use) he http://www.fathom.com/course/21701717/index.html And other British H2O2 rocket engines he http://www.spaceuk.org/htp/htp.htm That whole website's fun; here's its homepage: http://www.spaceuk.org/index.htm Pat |
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![]() Pat Flannery wrote: If it was just running pure peroxide, I think you'd see a lot more steam; And here is Armadillo running H2O2, notice the lack of steam after warming up? http://media.armadilloaerospace.com/...BoostedHop.mpg |
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![]() Damon Hill wrote: But overall, pretty darned cool. Yes, indeed. Best thing since DC-X. Imagine if that program had continued to be funded. New article on Encyclopedia Astronautica BTW: http://www.astronautix.com/craftfam/newurism.htm Pat |
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Hmm, this VTVL idea seems to me to be a deliberate attempt by Bezos to
position his endeavor for eventually taking a trip to the moon. First they go for LEO trips, and then later on they extend the use of this same spacecraft to touch down on the Moon. After awhile, they could set up a small base, then eventually a Disneyland/Hotel/etc. Then they could have REAL space tourism. Like Bigelow said, people don't want to just get a fleeting glimpse of space, they want to hang around and do stuff there. So IMHO, Bezos is planning his tech tree carefully. That means this spacecraft is not intended as a prelude to SSTO. It's intended as an upper stage and eventual moon lander. That's why Bezos wants Delta-IV engineers, so that he can build a comparable booster on which to perch this spacecraft, to get to LEO. Then later he uses it for moon landings. I know that sounds like over-imaginative speculation, but isn't it a fact that most of the energy required to get to the Moon is already achieved by rockets which can make high Earth orbit? I think Bezos is planning development of his current platform for a lot of extensibility. |
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