- Conceptual Design
- global warming
- lunar lander challenge
Category Archives: engines
Congratulations to SpaceX who landed the first stage intact. Assuming cost is roughly related to stage mass and engine count, reusing the first stage saves 9/10 of the whole rocket cost. If they can run the stage ten times, that … Continue reading
They say “Space is hard” Orbital Sciences crashed a rocket equipped with two 40 year old engines. Physically that old. They were an interim solution and they were working towards new engines. We don’t know at this point if the … Continue reading
The next fifteen years. Pure Electric – will be marginal Battery energy density will probably be lousy and they will be expensive so that pure electric cars can’t fill that many needs in the next fifteen years. What kind of … Continue reading
The movie’s available on Google Video, embedded above. Enjoy!
Well, I thought maybe I could add some content. Everybody’s heard about the British Hotol follower Skylon and its airbreathing SABRE engines. What’s special about them? My understandin’s based on this excellent document from Reaction Engines explaining why the system … Continue reading
[youtube=http://www.youtube.com/watch?v=DA0Vwausybg] Modern manufacturing technologies enable strange shapes and could produce unconventional pumps. What is good for small scale rockets if turbines and centrifugal pumps have too much tip losses? [youtube=http://www.youtube.com/watch?v=SdBr-dkLf4s] Rotary engines have vastly better power to weight ratios and … Continue reading
In a patent by the famous Barnaby Wainfan. EDIT: corrected the link. This patent was filed in 2006 and granted in 2008.
Huh, it always takes a long time to find anything on web pages that are so cluttered up. Here. No idea what the MPGe or miles per gallon equivalent is. EDIT: Here’s ERA’s video (they didn’t win, although they were … Continue reading
Well, scaling seems to be my pet issue. I recently wrote something not entirely well reasoned in a comment at Paul Breed’s. (For some reason Chrome complains about blogrolling.com malware there so continue if you’re sure you’re safe.) So let’s … Continue reading