From June 1959 until 1965 a number of NF Mk.14s served as training aircraft, first with No.2 Air Navigation School and then with No.1 Air Navigation School. These aircraft had their armament and radar removed, and the radar replaced by a UHF radio set.
We used to do a number of high level navexes with tops at FL390, heating was adequate but of course only pressurised to 25k, no bang seat, and a standard H-mask.
One trip we did was a Gee-Homing where we would tune in the Gee Mk 3 and instruct the pilot with left-hand down a bit, right-hand down abit keeping the strobes lined up. The first two legs were fine with near straight hyperbolic lines. The third leg was very sporty with the curve increasing down the track. The secret, not always told to the studes, was to stay inside the curve. If you drifted outside it was near impossible to get back as you needed more than 60 AOB at 370.
Aeros were not allowed in the NF14(T) so we didn't do any. Oddly the aircraft was able to climb and dive in a circle and indeed go inverted but we never did loops and rolls (honest
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