I think that a pressure altimeter that stores maximum will misread
copiously (upwards, in altitude)) about when the motor burns out (hint:
bernoulli suction on the pressure port at the maximum speed will fake an
altitude much greater than really attained. Worse, the peak in the record
will NOT indicate maximum altitude and there should be no way to read it
off the record - perhaps it would make a saddle curve and the bottom of
the saddle would be the apogee - if the horizontal speed would be
negligible - but it will not be ;-). The maximum altitude can be recorded
with an apogee switch, by pressure or otherwise. Now, who knows about a
reliable apogee switch (not the magneto resistive one please). Perhaps you
could use a horizon sensor with 4 photocells and sense tilt from
near-vertical.

Peter

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