High-speed video of Carbines firing...
Printed From: The Carbine Collector's Club
Category: The Club
Forum Name: General Discussion
Forum Description: Carbine Related
URL: http://www.uscarbinecal30.com/forum/forum_posts.asp?TID=6292
Printed Date: Apr 19 2024 at 7:44pm
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com
Topic: High-speed video of Carbines firing...
Posted By: markserbu
Subject: High-speed video of Carbines firing...
Date Posted: Jul 21 2022 at 11:57am
| 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" rel="nofollow - https://youtu.be/clfW4cZg1O0 |
Replies:
Posted By: Jond41403
Date Posted: Jul 21 2022 at 12:37pm
| Welcome to The forum mark! Thanks for the cool video! I'm used to seeing you on YouTube with your awesome 50's haha |
Posted By: Smokpole
Date Posted: Jul 21 2022 at 7:47pm
|
Interesting seeing the extractor movement too. ------------- OGCA Life member NRA Life member Ashtabula Rod and Gun Life member |
Posted By: john843
Date Posted: Jul 21 2022 at 9:51pm
|
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 |
Posted By: markserbu
Date Posted: Jul 21 2022 at 10:37pm
| Haha, thanks. With YouTube it's getting tough to do ANY gun content, at least to get paid while doing it! |
Posted By: markserbu
Date Posted: Jul 21 2022 at 10:40pm
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!
|
john843 wrote:Posted By: Timothy
Date Posted: Jul 22 2022 at 1:35pm
|
Nice to see the dynamics of all the parts. What sort of lighting did you use for the higher framing rates? ------------- T R |
Posted By: markserbu
Date Posted: Jul 22 2022 at 6:45pm
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.
|
Posted By: blackfish
Date Posted: Jul 22 2022 at 7:01pm
|
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. |
Posted By: David Milisock
Date Posted: Jul 23 2022 at 9:14am
|
The slide bounce once entering battery is very interesting. Depending on when the next round is fired that definitely would affect extraction timing. ------------- David Milisock |
Posted By: New2brass
Date Posted: Jul 24 2022 at 12:23pm
|
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 http://www.uscarbinecal30.com/Williams.html" rel="nofollow - http://www.uscarbinecal30.com/Williams.html 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! ------------- http://www.uscarbinecal30.com/forum/club-assistance-saginaw-receivers_topic4716.html" rel="nofollow - Club Survey Saginaw Receivers |
Posted By: markserbu
Date Posted: Jul 24 2022 at 3:43pm
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...
|
Posted By: markserbu
Date Posted: Jul 24 2022 at 3:58pm
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.
|
Posted By: markserbu
Date Posted: Jul 24 2022 at 3:59pm
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.  https://youtu.be/FKyXYMwJSns" rel="nofollow - https://youtu.be/FKyXYMwJSns
|
Posted By: W5USMC
Date Posted: Jul 24 2022 at 4:16pm
|
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. https://www.gunpartscorp.com/products/1122640" rel="nofollow - Magazine, .30 Cal., 30 Round, Original G.I. - Used, Fair Condition | Gun (gunpartscorp.com) ------------- Wayne USMC Retired NRA Life Member |
Posted By: blackfish
Date Posted: Jul 25 2022 at 10:40am
: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 |
Posted By: markserbu
Date Posted: Jul 29 2022 at 11:11am
Yeah, it's the crappy Russian stuff. Will get some proper ammo eventually. Thanks for the mag suggestion! |
Posted By: markserbu
Date Posted: Jul 29 2022 at 11:12am
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!
|
Posted By: blackfish
Date Posted: Jul 29 2022 at 4:10pm
|
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 |
Posted By: Jond41403
Date Posted: Jul 29 2022 at 4:36pm
| 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 |
Posted By: David Milisock
Date Posted: Jul 30 2022 at 9:09am
|
The slide bounce is very interesting to me. ------------- David Milisock |
Posted By: markserbu
Date Posted: Jul 31 2022 at 12:44am
Bought. It's really an essential tool for developing semi-automatic and fully-automatic firearms. It's amazing how much counterintuitive stuff goes on in the process of designing guns, and it's invaluable to actually SEE and expose those little gremlins that have been plaguing a design!
|
Posted By: markserbu
Date Posted: Jul 31 2022 at 12:45am
Aw, shucks. Thanks for the kind words!
|
Posted By: Jond41403
Date Posted: Jul 31 2022 at 5:43pm
Thank you for all the years of great content! You truly are one of the greats in firearm design! I have learned a ton from watching your channels and it's always cool to see your designs from prototype to production on some of them. You always explain how and why and show in great detail of what is being done. You're a great teacher Mark. also,thank you for bringing your knowledge and expertise to this forum. Godspeed |
Posted By: markserbu
Date Posted: Aug 02 2022 at 4:46pm
Well thanks again. I'm "blessed" (in quotes for the atheists) with the right combination of intelligence, luck, stubbornness and a desire to learn, I guess. I think there are untold thousands of people who could achieve far more in their lives if they'd just change their evening routines from watching sitcoms, getting drunk and falling asleep in the easy chair. Not that I haven't fallen asleep drunk on the couch or easy chair, it's just that I do it fairly rarely. Most other nights I'm designing stuff in CAD. I got to where I am (wherever that is) mostly by working a LOT of hours and learning everything I can about my craft.
|