Agree, but he seemed very sure that he had been told by his instrument
designer that MC zero would alway yield max range glide since the
computer knew the wind and would take account of it.

Maybe I should ask Dave directly since the SN10 was the instrument in
question.

Andy

I pity our poor instrument designers. If they do nothing, mad pilots
will write in "something's wrong with your instrument, as I lower Mc
setting it shows me a worse glide angle!" If they make Mc=0 always the
glide extending setting, mad pilots write in with "something's wrong,
I select Mc 0 and it's telling me to fly 70 knots." If they set a
sticky knob that won't go below the glide-maximizing Mc value, mad
pilots will write with "something's wrong, I can't lower the Mc
setting."

John Cochrane