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#1
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You wouldn't use spoilers or speed brakes from a starting altitude of 1400' in a "watch this" dive. You would use them in a controlled descent from altitude to avoid overspeed. I am not familiar with the Rocket, but isn't the 300+/-mph an issue of 2% speed gain per 1000' and it flys at 30,000 feet, thereby increasing the groundspeed but not the IAS? I can't imagine that the Rocket has significantly different operating parameters than a regular of pressurized 337.
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#2
03-01-10, 04:40 PM
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The advertising of the Super SkyRocket said max speed 300 MPH, cruise speed 250 MPH, that was all at 20,000 feet. On an ISA day, flat out, you could achieve a true air speed of 300, they said. No one would fly flat out, for more than 5 minutes, at any altitude. The cruise, again, was at 75% power, and again at 20,000, oh and at medium weight.
That all translates to advertising stuff, and the theory that as altitude is gained, resistance is lessened.
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#5
03-03-10, 08:58 PM
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PS The P337 is limited to 20,000 ft. Out of safety I presume since it should be capable of 30,000 as is the T337. My guess is that they didn't want 337 pilots of pressurized aircraft to have to have the skills of a jet jocky in case of depressurization.
Dave Dillehay N84E
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#6
03-04-10, 12:03 AM
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You're on the right track. My understanding is the 20K limit was based on "newer" certification requirements back in the early 70's. But you're right, the airplane could fly higher, but not maintain cabin pressure, so in the eyes of the FAA its service ceiling is 20K.
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#7
03-04-10, 07:23 AM
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My airplane, N374DN, best altitude after operation at several altitudes from 14 to 22,000 without a doubt is 16,000 nominal ... I'm sure the wing extensions from Owen Bell would greatly improve performance above FL 18,000 ...
Jack
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Hybrid Mode
