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As I was pondering this an interesting point came up. How about a system with 2 elevators, one going up[ and one going down. Very hard to implement perhaps, but there went the angular momentum problem out the proverbial window. I believe the people currently working on this are looking at a...

Now at last, I think I can see some of the issues. I think Mr.Hughes arguement rests on an energy balance question, first law of thermodynamics and all that nice stuff. The crux of the issue making it an impossible feat is the fact that the energy required by the system (both to overcome gravity...

Mr. Hughes, I understand that you feel your experience gives you insight into this. While I am happy to grant you that, I, by the same token grant that credit to NASA's enginers. While you feel you may exceed their abilities, I find it hard to believe you can dismiss their approval of funding...

Mr. Hughes, I assume you were not serious as I already stated NASA has provided funding for this particular "hoax". Perhaps you should instead get a job with them, as you are obviously much smarter, being able to dismiss this based on basic laws of physics, where the obviously uneducated types...

Wow long time between responses. As a follow up, since my original post I looked further into this topic. While it is still pretty SF, it is close to realization, or the proponents are very convincing. I say this becuase NASA has pumped several million dollars into a group to explore the...

Did anyone see references to the above mentioned project and is there a consensus? Is it a hoax, a bunch of dreamers or a legitimate new technology? Dave

If I understand your question, then the answer (in Canada and the US) is the limit and ultimate loads are determined through drop test. Using an effective weight the appropriate portion of the gear is dropped from a height based on wing loading. This substantiates the strength (except fatigue)...

I need to determine flap loads for a low speed CAR 3 aircraft. Has anyone come across a simple method paper. Dave Pasquill, P.Eng