Re: door locks

[Graham Singleton <100421.2123@compuserve.com>]

>>A "universal aperture" in aeroplanes would be very useful.<<

Do you remember Drift Gauges? A very simple device, you looked through the floor
of your aeroplane at the ground, or sea, the direction the surface appeared to
be moving with respect to the centre line of the aircraft told you the drift
angle.
Gr aham