http://members.aol.com/cv192/engine.html A nitrous oxide and rubber NOX/HTPB (R45M rubber) is reported to produce 235 second Isp. This is equal to an exhaust...

With all eyes turning towards Mojave, Burt Rutan, and his (hopefully) X-prize winning designs, one begins to wonder what the next generation of these craft...

Did large meteor impacts cause volcanoes on the other side Mars? Here's approximate locations for those regions indicating a rough correlation as global...

How difficult is it to tailor a parking orbit for lunar missions that can be reached efficiently by US launchers and precesses 180 degrees in one lunar...

Assuming we eventually wish to mine asteroids for useful materials, we would need to first do some prospecting. What is the best/most economical method? I...

Proposed system to launch raw materials from the lunar surface to escape velocity: At the top of a 160 meter tall tower is a platform rotating at 100...

Anyone know the status of research on heat exchanger laser launch technology? By that I mean a vehicle that carries a propellant (maybe ammonia) that runs...

Has anyone tested the idea, for an SSTO, of running the engines at a low level at re-entry, thus using the engine exhaust as a heat-shield? As a related...

Regarding an alternate history in which a Near Earth Orbit asteroid is detected that could be visited by a modified Apollo mission. James Nicoll wrote: In...

Assuming a lunar settlement uses solar power for all their energy needs, the biggest problem is how to store power during the 328 hour lunar night. If the...

Henry Spencer wrote: In article , Pete Lynn wrote: ...I would expect them to...

Flywheel energy storage has been suggested for use on the Moon (see http://www.asi.org/adb/04/03/03/flywheel-energy-storage.html ). But I haven't seen a...

Robert Zubrin researched the idea of using large electro-magnetic fields to produce drag against the sparse interstellar medium. Found it would be a feasible...

Anybody out there with some thoughts on the best approach for the CEV? Simple capsule vs. some sort of aero vehicle? Myself, I lean towards the capsule just...

I just finished reading This New Ocean that covers the space age. I really wasn't looking forward to the Skylab part but after I read it and then googled up...

I just finished reading This New Ocean that covers the space age. I really wasn't looking forward to the Skylab part but after I read it and then googled up...

My father (Henry Cate) and I have come up with an initial tether project that might be fun, affordable, and profitable. The idea is to use a rotating tether...

In another book they also indicate that Apollo should go through the edge of the Van Allen belts. They studied a number of different vehicle configurations...

I have added the ability to simulate meteors to my simulator. It can calculate the trajectory, how much mass is left, the diameter, megatons of energy when it...

I could not reply to my May 25 post with my code for pressure tank mass calculations. I found the error in my code. The: double SphereVolume = 4/3 * PI *...