Does anybody out there have??

hornet driver · Mar 31, 2015

A used Estes 29mm bp casing. I need to know the weight so I can place the attachment point of the recovery gear on the first stage of my current build. Thanks in advance---H

tmacklin · Mar 31, 2015

hornet driver said:
A used Estes 29mm bp casing. I need to know the weight so I can place the attachment point of the recovery gear on the first stage of my current build. Thanks in advance---H

Yes. A spent F15 casing weighed 34 grams on my digital scale, which as a one gram sensitivity.

Tonimus · Mar 31, 2015

According to Thrustcurve.org, an E16 has a case weight of 44 grams and a F15 has a case weight of 42. These weights are total weight minus propellant, so erosion of the nozzle and blowout of the clay cap will decrease the weight a bit.

tmacklin · Mar 31, 2015

I just took the three spent Estes F15 casings out of a Ziplock bag full of spent casings and weighed them together. The result was 105 grams, for an average weight of 35 grams. Of course, YMMV. :wink:

hornet driver · Mar 31, 2015

Thanks guys, that's a huge favor----H

bobkrech · Apr 1, 2015

34 grams was the burnout weight we got when we certified them. https://www.nar.org/wp-content/uploads/2014/08/F15.pdf

The E16 is the same casing so the weight should be the same. You can expect variations of up to +/-0.5 g due to density differences and paper burning.

Bob

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