And where does the gravitational field come from when a single photon produces a positronium pair?
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But how did they cope with the fact that it wasn't actually on/over the Cg?lift?The CG is generally close to the CL to minimise elevator drag but it obviously moves around as you burn fuel or expend munitions, so you are frequently adjusting the trim tab en route to or from combat. Cruise trim was less critical in the Mustang which had most of the fuel in the wings ( so you have to switch tanks from time to time in cruise to keep the wings level) , and flying the Concorde involved a lot of pumping fuel between tanks to maintain trim,
Why did the Soviet Il/yushin-2 Sturmovik have an external/underslung oil cooler/radiator?Pretty well the only bulletproof part of a fighter was the secondary windscreen. Spitfires had one or two external radiators under the wings: much the same total area as they used the same engine, but differently configured because the undercarriage folded in the opposite sense.
Where it could be shot up, from behind, anyway, and U couldn't have a hardpoint.
Was it to take advuntage of the "Meredith effect" or was it a poor man's cabin heater?
And what about the P-51 Mustang and Hurricane, then?
What was with the mo/ustache?Absolutely vital piece of kit, my dear chap. Along with the girlfriend's knickers in one pocket, slightly grubby wings on the chest, and a battered cap with Brylcreem stains. Can't go around looking like a novice!
A United Kingdom government committee, known as the "Explosives Committee", chaired by Sir Frederick Abel, monitored foreign developments in explosives and obtained samples of Poudre B and Ballistite; neither of these smokeless powders was recommended for adoption by the Explosives Committee.
Abel, Sir James Dewar and W Kellner, who was also on the committee, developed and jointly patented (Nos 5,614 and 11,664 in the names of Abel and Dewar) in 1889 a new ballistite-like propellant consisting of 58% nitroglycerine, by weight, 37% guncotton (nitrocellulose) and 5% petroleum jelly. Using acetone as a solvent, it was extruded as spaghetti-like rods initially called "cord powder" or "the Committee's modification of Ballistite", but this was swiftly abbreviated to "Cordite".