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The limitation of the single stage supercharger was that the maximum power dropped quickly as higher altitudes were reached; because air pressure and air density decreases with altitude the efficiency of a piston engine drops because of the reduction in the weight of air [nb 1] that can be drawn into the engine; for example the air density, at ...
If "bounced" while cruising at low speeds it could take a Spitfire up to two minutes to accelerate to top speed. [58] The only way it was thought that a Spitfire could evade attack was to cruise at high speed and go into a shallow dive with the throttle open. Provided the Fw 190 was seen in time, it could be forced into a long stern chase. [57]
[122] Although not as fast as the Spitfire, the Zero could out-turn the Spitfire, could sustain a climb at a very steep angle, and could stay in the air for three times as long. [123] To counter the Zero, Spitfire pilots adopted a "slash and run" policy and used their faster speed and diving superiority to fight, while avoiding turning ...
This means as the powder burns, the burn rate slows down. To some degree, this can be offset by the use of a retardant coating on the surface of the powder, which slows the initial burn rate and flattens out the rate of change. Ball powders are generally formulated as slow pistol powders, or fast rifle powders.
However, due to the weight of the ammunition, sustained fire is constrained by ammunition payload, as many aircraft cannons only carry enough ammunition for a few seconds' worth of firing; for example, the F-16 Falcon and its variants carry 511 rounds of 20mm ammunition, and the F-22 Raptor carries a similar amount at 480 rounds, which equates ...
The .22 Spitfire is an American wildcat rifle cartridge developed by Col. Melvin M. Johnson. It was originally named the MMJ 5.7mm [ 1 ] by its designer and is also known in the U.S. as the 5.7mm Johnson , the Johnson MMJ 5.7mm Spitfire , and the .22 Johnson , (or 5.7×33mm internationally).
There have been many thousands of friendly fire incidents in recorded military history, accounting for an estimated 2% to 20% of all casualties in battle. [1] [2] The examples listed below illustrate their range and diversity, but this does not reflect increasing frequency.
The Spitfire's fuselage was redesigned to improve the pilot's sightline for deflection shooting and to use a larger fin and rudder to eliminate directional instability. [ 13 ] [ note 3 ] The instability had arisen following the introduction of the more powerful Griffon engine and was exacerbated by the introduction of the four-bladed and ...