JimJarvis50
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So, the altimeter in question is the Altus Metrum EasyMega. I've learned a few things about this altimeter recently that are a little surprising. For one thing, Keith has confirmed that the "Time of Flight" timer resets after each new boost. So, if you have a time trigger set, and then have a second stage boost, the timer will reset to zero at the start of the second boost. Also, a burnout setting of 1, for example, means "exactly" one burnout and not "at least" one burnout. Thus, if you have something set to happen after one burnout, it will not happen after a second burnout if there is one. These things aren't documented very well at present, but they will be in the next version of the operating manual.
At any rate, I do a lot of staged flights and I have a three-stage flight planned for Balls again this year. Therefore, I would like to be able to understand - and demonstrate - exactly how this altimeter works. So, I set up an apparatus to do some spin testing (it's easier than spinning your arm, which starts to hurt after a while). In my initial spin testing, I have not been able to perform a valid test. The altimeter recognizes the boost state, and will fire channels based on that event. However, the altimeter doesn't seem to transition into the coast state, even with the altimeter held upside down to generate negative acceleration. That is, the altimeter doesn't seen to recognize a "burnout". I note also that the data file from the testing doesn't indicate any increase in altitude or velocity (so the altimeter is not using acceleration alone to calculate those values). I suspect that this is why the "flight" is not happening during the swing test. My question is, has anyone been able to do successful spin testing with the Altus Metrum altimeters?
Jim
At any rate, I do a lot of staged flights and I have a three-stage flight planned for Balls again this year. Therefore, I would like to be able to understand - and demonstrate - exactly how this altimeter works. So, I set up an apparatus to do some spin testing (it's easier than spinning your arm, which starts to hurt after a while). In my initial spin testing, I have not been able to perform a valid test. The altimeter recognizes the boost state, and will fire channels based on that event. However, the altimeter doesn't seem to transition into the coast state, even with the altimeter held upside down to generate negative acceleration. That is, the altimeter doesn't seen to recognize a "burnout". I note also that the data file from the testing doesn't indicate any increase in altitude or velocity (so the altimeter is not using acceleration alone to calculate those values). I suspect that this is why the "flight" is not happening during the swing test. My question is, has anyone been able to do successful spin testing with the Altus Metrum altimeters?
Jim