September 14th, 2009
Display from a de Havilland Vampire T.11, WZ507 based at North Weald, Essex at the Little Gransden Airshow in 2009. Operated by the Vampire Preservation Group
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de Havilland Vampire T.11 WZ507 spectrogram

Vampire Preservation Group Vampire T.11
September 14th, 2009
A sound recording of P-51 Mustang “Janie” recorded in August 2009.
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And a spectrogram of the recording.

P-51 Mustang Janie Spectrogram
September 14th, 2009
Sound recording of a recently rebuilt P-51 Mustang “Marinell” at the 2009 Little Gransden Airshow.
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And a spectrogram of the recording.

P51 Mustang Marinelle Spectrogram
September 14th, 2009
2 sound recordings of Spartan Executive aircraft, considered the Lear Jet of the 1930s, popular with US Oil Corporations and owned by the very wealthy.
First recording is of 2 Executives taking off.
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Spectrogram of Spartan Executive take off
Second recording of 2 aircraft in a display. The two aircraft are discernible by the note of the engine/propeller, obviously a radial.
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Spectrogram of 2 Spartan Executive in display
One of the aircraft is based (as far as I know) at Little Gransden. In the display is the leading aircraft.