Author Topic: Hard Air Magazine - Technical Editor  (Read 5023 times)

rsterne

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Re: Hard Air Magazine - Technical Editor
« Reply #15 on: March 20, 2019, 08:15:29 PM »
Part 10 of my series on PCPs is now online.... https://hardairmagazine.com/ham-columns/tuning-regulated-pcp-airguns/

Bob
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rsterne

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Re: Hard Air Magazine - Technical Editor
« Reply #16 on: April 25, 2019, 07:23:36 AM »
Part 11 of my series of articles, and the last one on PCPs is online....

https://hardairmagazine.com/ham-columns/pcp-efficiency-what-is-it-what-changes-it/

Next month I begin a series on Ballistics, Internal, External and Terminal....

Bob
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Alan

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Re: Hard Air Magazine - Technical Editor
« Reply #17 on: April 25, 2019, 10:41:45 AM »
I'm waiting for the latter... Terminal Ballistics, which has been my favorite subject for a number of years. Thanks in part, I must add, to John Schaefer, better know as Fr. Frog (https://www.frfrogspad.com).
  • Roswell, New Mexico
Alan

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rsterne

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Re: Hard Air Magazine - Technical Editor
« Reply #18 on: May 28, 2019, 07:30:14 AM »
My first article on Ballistics is now online at HAM.... https://hardairmagazine.com/ham-columns/pcp-airgun-internal-ballistics/

This covers the Internal Ballistics of PCPs, so is basically a transition from the PCP Series to the Ballistics Series....

Bob
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rsterne

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Re: Hard Air Magazine - Technical Editor
« Reply #19 on: July 08, 2019, 07:33:11 PM »
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rsterne

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Re: Hard Air Magazine - Technical Editor
« Reply #20 on: July 23, 2019, 07:10:19 PM »
Article #14.... The External Ballistics of Slugs in Airguns…. is now online at HAM....

https://hardairmagazine.com/ham-columns/the-external-ballistics-of-slugs-in-airguns/

Bob
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steveoh

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Re: Hard Air Magazine - Technical Editor
« Reply #21 on: July 23, 2019, 07:50:15 PM »
Article #14.... The External Ballistics of Slugs in Airguns…. is now online at HAM....

https://hardairmagazine.com/ham-columns/the-external-ballistics-of-slugs-in-airguns/

Bob

This is another great article and it’s written so clearly that even I can grok it!
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rsterne

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Re: Hard Air Magazine - Technical Editor
« Reply #22 on: August 14, 2019, 08:14:22 PM »
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rsterne

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Re: Hard Air Magazine - Technical Editor
« Reply #23 on: September 23, 2019, 08:03:05 AM »
The next article in my series on External Ballistics is now online at HAM.... Article #16 deals with Vertical Deflection in a Crosswind....

https://hardairmagazine.com/ham-columns/vertical-deflection-for-pellets-in-crosswind/

Bob
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Jay

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Re: Hard Air Magazine - Technical Editor
« Reply #24 on: September 26, 2019, 05:21:10 AM »
just read the first one bob congrats
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rsterne

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Re: Hard Air Magazine - Technical Editor
« Reply #25 on: October 07, 2019, 08:30:27 AM »
Article #17, on Pellet and Slug Stability, is now online at HAM....

https://hardairmagazine.com/ham-columns/pellet-and-slug-stability/

Bob
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Alan

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Re: Hard Air Magazine - Technical Editor
« Reply #26 on: October 07, 2019, 09:47:05 AM »
This subject brings up a question. I wonder how the Labradar with react to nutating vs. non-nutating pellet/slug flight? I suspect you'll soon know, Bob.
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Alan

I have an Omega compressor. If you're a fellow Guild member, and you pass through Roswell, NM, I'll fill your portable tank as a courtesy.

rsterne

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Re: Hard Air Magazine - Technical Editor
« Reply #27 on: October 07, 2019, 03:59:55 PM »
Funny you should ask.... I have been emailing back and forth today with Ron Burnett, who has a LabRadar…. and has observed what we think is exactly that.... It looks like the "wobbling" of the pellet (in this case a 10.3 gr. JSB Exact Heavy .177 cal) significantly increases the drag.... If that isn't the answer, I don't know what is.... because launching the pellet at over Mach 0.8 (900 fps) increases the drag once below that velocity.... and launching it faster makes the situation worse.... Interestingly, the 8.4 gr. Exact shows no such tendency....  :o

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Alan

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Re: Hard Air Magazine - Technical Editor
« Reply #28 on: October 07, 2019, 05:33:41 PM »
I think this is a subject which needs to be explored to a much greater extent. With the grace of the Lord, you'll have a lot of time to make the subject much more enlightened! I for one, am looking forward to your research.

Oh! Can we talk about terminal ballistics one of these days??
  • Roswell, New Mexico
Alan

I have an Omega compressor. If you're a fellow Guild member, and you pass through Roswell, NM, I'll fill your portable tank as a courtesy.

rsterne

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Re: Hard Air Magazine - Technical Editor
« Reply #29 on: October 07, 2019, 08:02:27 PM »
My articles on Terminal Ballistics will only be theoretical (how penetration changes with velocity and SD, with non-expanding projectiles)…. plus some real world examples of wound cavities in soap from solids compared to HPs.... It will follow on after the External Ballistics portion is done....

Bob
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