Low-Tech
On 19 April 1957 I last flew a Tiger Moth, G-AKCH. My recollection is that the ASI was basic, being:
(a) a fore-and-aft quadrant, gradated in knots, fixed to a starboard upper strut,
(b) to which was attached a spring-loaded hinged lever,
(c) at the lower end of which was mounted a lateral-axis plate,
(c) that was pushed back along the quadrant by the air pressure of movement,
thus indicating airspeed.
Old men forget, of course, and I wanted to check this. It was the work of moments to order a copy of the Tiger Moth pilot's notes from Amazon. That has duly arrived, but in an Australian version that indicates the cossetted treatment they got in Oz. No quadrants for them, we may be sure; right there on the instrument panel is a genuine ASI. That is no use to me.
Can anyone keep me right on the plate and quadrant?