Altimeter hole placement Nike Smoke

[Christopher Dreher]

Batman – I forgot about this thread for a while, but I did finish the tether project over the summer. You can find project pictures here, they might be some help if DD in the Nike is still something you are looking at:

https://picasaweb.google.com/103846431504446049036/NikeElectronicsModification#

I tried to put the pics in the most logical order of assembly, feel free to ask questions. I should have this rocket back in Colorado for the summer and hopefully I can make it to a few launches.

[MikeSModerator]

fantastic work.

[Christopher Dreher]

fantastic work.

Thanks!

[Christopher Dreher]

So here is a data graph from a Stratologger that was flying in the Nike.

https://plus.google.com/photos/103846431504446049036/albums/5653006273001182769/5713317544085396418

A purely baro-based seems to work fine in a Nike nosecone. My vents are a bit oversized (seen in a different picture within the album). This specific flight used motor deploy at apogee, a few seconds too long from optimal.

Without a drogue, the rocket fell at about 52 feet/sec, and 21 feet/sec under the parachute after the tether released. Those decent rates were based off the altitude changes within the 20-30 second and the 40-50 second intervals respectively, when the rocket appears to be stabilized in each phase the decent. The velocity values seem to be all over the place especially in the drougeless decent, so I’m sticking with the above method to figure out decent rates.

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