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General & Off-Topic
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Classic warbirds and other aviation vids.
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<blockquote data-quote="LE BARON" data-source="post: 340801" data-attributes="member: 3515"><p>[ATTACH=full]124000[/ATTACH]</p><p>Crazy fast looking airplanes, huh? Yet none made into production. Why? Propellers are severely mach limited. When the airplane approaches (and by that I mean to within about 70%) of supersonic speed (mach 1) the propeller (especially the tips) must be going faster than supersonic. This causes all sorts of problems among them a dramatic drop in efficiency, so it takes a doubling in power to go just a few knots faster, and another doubling to go a few knots faster still. Things get really really loud also. (Hence the name “Thunderscreech”). Supersonic flight using propellers for thrust is effectively impossible. It has been done, but only in a dive and the penalties are horrendous.</p></blockquote><p></p>
[QUOTE="LE BARON, post: 340801, member: 3515"] [ATTACH type="full"]124000[/ATTACH] Crazy fast looking airplanes, huh? Yet none made into production. Why? Propellers are severely mach limited. When the airplane approaches (and by that I mean to within about 70%) of supersonic speed (mach 1) the propeller (especially the tips) must be going faster than supersonic. This causes all sorts of problems among them a dramatic drop in efficiency, so it takes a doubling in power to go just a few knots faster, and another doubling to go a few knots faster still. Things get really really loud also. (Hence the name “Thunderscreech”). Supersonic flight using propellers for thrust is effectively impossible. It has been done, but only in a dive and the penalties are horrendous. [/QUOTE]
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General & Off-Topic
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Classic warbirds and other aviation vids.
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