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Posted By: AsterixHere it comes--a KickstarterI haven't had any more contact with this guy, but he posted a comment where he claims:
CreatorAnd every Nobel Laureate of the early 20th century knew that heavier then air flying machines were impossible too.
Posted By: tinkerThere have been several steam-powered aeroplanes. All of them small, some worked ok, but they were pretty much made as curiosities.
Posted By: alsetalokinHmm. I found this strange little paper:Curious indeed and I don't believe it.
http://educate-yourself.org/cn/ElectronBeamMagneticField.pdf
Posted By: Andrew PalfreymanTake a straight electron beam of circular cross-section 1mm^{2}(so r = 0.564 mm). Take the beam current to be 1.6 uA. Both these numbers are reasonable and fairly typical values around and about, I reckon. Then there are 10^{13}electrons passing per second (independent of the beam cross-section). Then the magnetic field due to this beam current is10^{-10}Tat a radial distance of 3.2 mm - about 6 beam radii distant, so hardly "near field" I believe.The magnetic field per electron due to its magnetic dipole moment, at the same distance of 3.2 mm, is 6*10^{-23} T. 10^{13} electrons flow per second. What's the total field? Buggered if I know.
Posted By: Andrew PalfreymanWhat's the total field? Buggered if I know.What you need is the number of electrons per metre of beam, and then do a line integral to sum all the contributions. However, to get the number/m, you need the velocity, which is unknown. Also, the field from a dipole reduces as 1/r^3, so only the section closest to the nearest-point will contribute. If one takes a 10 cm length of beam as contributing substantially to the sum, then a first approximation is to divide the answer you got by (10.v).
Posted By: AsterixThis made me think about steam trains and the smoke stack, why was the engine at the front and not at at the back, where all the smoke will be blown away from the passengers?Posted By: tinkerThere have been several steam-powered aeroplanes. All of them small, some worked ok, but they were pretty much made as curiosities.
I could possibly see a steam turbine or jet setup, but reciprocating-piston flying machines?