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Old Nov 11, 2015, 01:35 PM
dbanga is offline
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Joined May 2014
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Apogee Aspire + Mach 1 + Altimeter?

A few years ago I tried to go supersonic with an Apogee Aspire on an Estes G80-7T. I followed all the tips (i.e. airfoil the edges of the fins and laminate them, create fillets between the body tube and fin roots, etc.), simmed it in OpenRocket (which said 4,700 ft and 877 mph), and stuck a JollyLogic AltimeterTWO in there for confirmation.

When it came back, the altimeter was blinking at 562 mph (meaning I exceeded the G-limit of the device), and read 3,780 feet for max altitude. Later I read that I was supposed to angle the altimeter so that a corner of the device faces upward in order to not exceed the G-limit and get the true max. velocity reading.

I'm building another one now and I want to know if there's a better altimeter to use that won't break the bank -or- if someone has used the AltimeterTWO on a Mach 1 Aspire successfully, how??
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