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#14
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"Kingfish" wrote in message oups.com... Dudley Henriques wrote: Most of the actual sound the ear picks up from an airplane is caused by the prop. In the case of the Mustang, with a Hamilton Standard propeller, you have a prop with an 11 foot 2 inch diameter. Naturally a prop this size has a tip speed problem so in a stock Merlin its geared down to a .491:1 through a reduction gear to the engine RPM. At 3000 RPM , the prop is actually rotating at 1473RPM. Its mostly the sound the prop makes as it works the air coupled with the exhaust tuning through the tubes that gives the 51 its distinctive sound. There's also a contribution through the radiator that adds just a "touch" to the mix. My conception has always been that its a moaning sound; sort of like a low pitched moaning wail. Dudley I've only heard a Mustang flyby once and it was memorable. I went to the Corsairs over Connecticut roundup last year and heard a few low passes by a 4-ship that gave me goosebumps. Gotta love round engines. The owner of my company flew P-51s in WW2 based at Martlesham Heath. They'd transitioned from the P-47s (early D models with the razorback canopy) to the -51 and their type training consisted of a copy of the AFM and a few spins around the patch and they were mission qual'd. Yikes. There's always room at the table for the round engines :-) I have to say that flying the F8F had its moments for me as well. As to checkouts in single engine fighters; you're right; if you're lucky, as I was, you get some time in a T6 flying it from both the front and the back seats to get used to the visual cues around the nose during taxiing, takeoff, and landings. Then you take the Dash-1 home and read it from cover to cover, then you climb in and go for it! :-) Dudley Henriques |
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