spitfire Vb or Vc differences?
The test pilot, Jeffrey Quill, in his book "Spitfire" quotes the following differences; F. Mk Vb. 1470hp RR Merlin 45 with the B wing. L.F. Mk Vb. 1585hp RR Merlin45M. Lower altitude rating engine. F. Mk Vc. 1470hp RR Merlin 45, 50, 50A, 55,56. Fitted with the C Universal wing.