Author Topic: German-Brazilian Green Alcohol Rocket Fuel Research  (Read 890 times)

Offline mto

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Not sure if this is the right sections for this - mods please pls move if required

German-Brazilian Green Alcohol Rocket Fuel Research
https://solarthermalmagazine.com/2017/02/16/german-brazilian-green-alcohol-rocket-fuel-research/
Quote
Alcohol Rocket Fuel.

The number of rocket launches have increased significantly in the last decade. Rockets are needed for everything from restocking the international space station to launching military and commercial communications satellites. All of these rocket launches are actually contributing to air pollution and atmospheric co2 levels.

The German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR) and the Brazilian aerospace agency Agência Espacial Brasileira (AEB) have taken a big step forward in the development of a new rocket that is fuelled with oxygen and alcohol. The results presented here of the first burn test series for the upper-stage engine of a future Brazilian small launch vehicle demonstrate this. The tests with two newly designed injection heads were successfully completed in December 2016 within the framework of a German-Brazilian partnership.

Offline Rei

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Re: German-Brazilian Green Alcohol Rocket Fuel Research
« Reply #1 on: 02/18/2017 01:36 AM »
If there's one tech that you don't want to sacrifice performance on, it's rockets.  Every little bit of ISP you give up means you have to burn massively more fuel, which isn't doing the environment any good.

If you want your propellant to be renewable, use a syngas sourced hydrocarbon (ideally short chain), or hydrolox.

Offline CameronD

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Re: German-Brazilian Green Alcohol Rocket Fuel Research
« Reply #2 on: 02/19/2017 09:31 PM »
It's certainly odd that they state categorically that "All of these rocket launches are actually contributing to air pollution and atmospheric co2 levels" and then go on to talk about using a hydrocarbon fuel as if theirs is somehow less polluting than LH2/LOX.

Aside from that, the only thing "green" about alcohol fuel is the leaves of the plants it's produced from.

With sufficient thrust, pigs fly just fine - however, this is not necessarily a good idea. It is hard to be sure where they are
going to land, and it could be dangerous sitting under them as they fly overhead.

Offline Arch Admiral

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Re: German-Brazilian Green Alcohol Rocket Fuel Research
« Reply #3 on: 02/20/2017 02:31 AM »
Actually, "green rocket fuel" seems to mean a SAFER replacement for hydrazines and N2O4 in maneuvering thrusters on spacecraft, not something that will reduce greenhouse gases. The PR guy who wrote that blurb seems to be confused on this point.

Alcohol/LOX was the propellant combo of the V-2, so it hardly seems necessary to re-invent this technology -- especially in Germany!!

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