Click on the image above to learn more about the M1 Carbine
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High-speed video of Carbines firing... |
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markserbu
Recruit Joined: Jul 11 2022 Location: USA Status: Offline Points: 36 |
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Posted: Jul 21 2022 at 11:57am |
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Just made this quickie video last night to check out the actions on my Rock-Ola and IBM. I figure it would be appreciated here, and most likely some folks here know what I didn't know about the Korean writing on the stock of the IBM. https://youtu.be/clfW4cZg1O0
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Jond41403
On Point Joined: Feb 21 2021 Location: East Tennessee Status: Offline Points: 216 |
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Welcome to The forum mark! Thanks for the cool video! I'm used to seeing you on YouTube with your awesome 50's haha
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Smokpole
Hard Corps Joined: Oct 21 2019 Location: Madison ohio Status: Offline Points: 1058 |
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Interesting seeing the extractor movement too.
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OGCA Life member
NRA Life member Ashtabula Rod and Gun Life member |
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john843
Recruit Joined: Jan 29 2021 Location: south carolina Status: Offline Points: 97 |
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Very interesting and very cool. Besides being fun to watch, that looks like it could have really good diagnostic potential for cycling problems and such. Thanks for sharing!
John |
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markserbu
Recruit Joined: Jul 11 2022 Location: USA Status: Offline Points: 36 |
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Haha, thanks. With YouTube it's getting tough to do ANY gun content, at least to get paid while doing it!
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markserbu
Recruit Joined: Jul 11 2022 Location: USA Status: Offline Points: 36 |
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Ok, now I figured out how to quote. ;-) Yeah, I've got some high-speed footage of an M2 carbine that I can't seem to find. It runs for several rounds but you can see the bolt not going back as far with each round until it won't pick up a new one from the mag. You definitely can't beat high-speed video for diagnosing cycling problems!
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Timothy
On Point Joined: Jan 13 2022 Location: Crossville TN Status: Offline Points: 109 |
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Nice to see the dynamics of all the parts. What sort of lighting did you use for the higher framing rates?
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T R
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markserbu
Recruit Joined: Jul 11 2022 Location: USA Status: Offline Points: 36 |
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I have a couple of really badass LED lights that are specifically made for high-speed video work. I hope to get some more Carbine high-speed footage this weekend and I'll take a picture of the setup if I do.
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blackfish
On Point Joined: Mar 30 2016 Location: 999-0 Status: Offline Points: 290 |
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Time Reference:
To step thru the video frame by frame is interesting. It would be really nice if you could label the frames by time or number from start giving the frame rate. Most "high speed" videos on YouTube are "abridged" (to keep the video filesize manageable), providing only, say, every 20th frame but nowhere is it stated what's missing, so to extract event timing from the video is impossible. |
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David Milisock
On Point Joined: Aug 03 2019 Location: USA Status: Offline Points: 334 |
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The slide bounce once entering battery is very interesting. Depending on when the next round is fired that definitely would affect extraction timing.
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David Milisock
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New2brass
Moderator Group Dan Pinto, Photo Editor Joined: Nov 29 2015 Location: CT Status: Offline Points: 4664 |
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Mark. Welcome to the forums, I know the name and I have seen your videos before. Good Stuff! On Carbine Williams, He was a character and the movie, well lets say it has embellishments. Check out or pages on Williams On the high speed, what type of camera are you using? I am guessing that lighting is always an issue. Would daylight be beneficial to brighten things up? I was privy to some some pictures of the carbines from the Olin/Winchester collection. Winchester had experimented with different gas systems as well as their own design of a full auto carbine. One of the stocks had lines on the side of the stock marking the slide travel. As best as we could figure this was used in high speed film to measure just how far the slide traveled. I would love to see that footage if it exists! |
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markserbu
Recruit Joined: Jul 11 2022 Location: USA Status: Offline Points: 36 |
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I mostly use the high-speed video for firearm development and it's an incredibly valuable tool. Putting videos on YouTube is more for fun and I just don't have the editing time to do a frame count. Actually, there's probably a utility somewhere that would show a frame count right in the video. Yet another thing to hand off to my video editor, when/if I get another one...
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markserbu
Recruit Joined: Jul 11 2022 Location: USA Status: Offline Points: 36 |
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Thanks! Will have to read up on Carbine. Was definitely a good story but Hollywood tries to always make sure it's a good one, truth be damned. Chronos 1.4 camera. Yeah, sunlight is best but it's nice to have a controlled environment (that's also air conditioned!) Makes sense to witness mark the stock. I usually put pieces of tape or paint marker lines on my guns when I'm doing high-speed video analysis.
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markserbu
Recruit Joined: Jul 11 2022 Location: USA Status: Offline Points: 36 |
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New video, this time with a magazine! BTW, where can I get GOOD 30-round mags? I don't care if they're original or not, as long as they function well. Oh, and just a quick check going frame-by-frame of the raw footage shows that the bolt velocity in recoil is 15 feet per second. For the nerds like me who care about that sort of thing.
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W5USMC
Moderator Group Joined: Apr 29 2017 Location: Missouri Status: Offline Points: 2968 |
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Love these videos! Is that steel cased ammo?
Numrich sells USGI 30 round mags described as fair condition, the ones I got from them needed cleaned up a bit, slight pitting but work fine.
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Wayne
USMC Retired NRA Life Member |
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blackfish
On Point Joined: Mar 30 2016 Location: 999-0 Status: Offline Points: 290 |
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:2T: Very interesting. Just a point of reference FWIW from a nerd IIRC, from video made at Inland during development, initial recoil slide velocity was on the order of 20-25 ft/sec |
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markserbu
Recruit Joined: Jul 11 2022 Location: USA Status: Offline Points: 36 |
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Yeah, it's the crappy Russian stuff. Will get some proper ammo eventually. Thanks for the mag suggestion! |
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markserbu
Recruit Joined: Jul 11 2022 Location: USA Status: Offline Points: 36 |
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Yeah, my velocity was the average over the whole stroke. I may go back and look to see if my results agree with that 20-25 number, thanks!
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blackfish
On Point Joined: Mar 30 2016 Location: 999-0 Status: Offline Points: 290 |
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You've got one heck of a tool there. Ejection of spent cases is also interesting. Different slides were designed, in part, using video like this, to mitigate a very very difficult problem.
If you don't mind me asking, is your equipment borrowed, rented, or bought? Thanks |
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Jond41403
On Point Joined: Feb 21 2021 Location: East Tennessee Status: Offline Points: 216 |
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I would guess most likely owned(I could be completely wrong though). You should really check out his YouTube channels if you haven't already, they are extremely informative on machining, heat treating, welding, you name it. He is an amazing designer of firearms in general. I hope I'm not breaking any rules here by recommending someone's YouTube channels but for people on here that do not know, they really need to check him out. Outstanding content
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