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Old 4th Apr 2021, 18:03
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garyscott
 
Join Date: Aug 2010
Location: somerset
Posts: 94
Sounds about right.
Spey Phantom had a slightly lower max at alt, but quicker accel down low compared to J79 equipped F-4.
At height, the J79 could attain a higher Mach than the Spey.
Spey - having a wider ar5e wouldn’t have helped the aerodynamics much.
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