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The Official High-Speed Camera Thread

All non-spudgun related discussion goes here such as projects, theories, serious questions, etc. All "off-topic" posts (aka useless posting, determined by moderators) will be removed.
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Unread postAuthor: wyz2285 » Mon Jan 07, 2013 1:47 pm

Will LED flicker on AC power source? After a quick look around I found that I can easily and cheaply get a big LED light (basically a large panel of LEDs) that already has a build-in setup to run on AC house power
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: wyz2285 » Wed Jan 30, 2013 12:32 pm

The LED setup work, does not flick. Haven´t needed it through.
[youtube]http://www.youtube.com/watch?v=eKPOzxaZJFs[/youtube]
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: jackssmirkingrevenge » Wed Jan 30, 2013 12:43 pm

Nice :) btw, didn't you have a BBMG? *wink wink*
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Unread postAuthor: wyz2285 » Wed Jan 30, 2013 12:52 pm

I do, and the price of the bb went down as well now I can get 6000 for 11 euro, half the price as before :D .
I was gonna shot can with my bbmg, but didn't feel like clean the mess up after, but it's on my to do list :)
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CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
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Unread postAuthor: jackssmirkingrevenge » Tue Aug 13, 2013 11:51 pm

jackssmirkingrevenge wrote:[youtube]http://www.youtube.com/watch?v=0giK-zqrAKI[/youtube]


Been looking at analytics, the 4th highest number of hits by country for this video is from Syria... methinks the rebels are doing their research!

also, just to kick this thread up a bit, painfully slow motion footage of a Tomahawk cruise missile impact test:

[youtube]http://www.youtube.com/watch?v=Mr2qbrsUyHs[/youtube]
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Unread postAuthor: jackssmirkingrevenge » Mon Sep 02, 2013 7:06 am

CGI but pretty awesome:

[youtube]http://www.youtube.com/watch?v=0sfA-NsbzJY[/youtube]
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Unread postAuthor: Gnarp » Mon Sep 02, 2013 10:47 am

jackssmirkingrevenge

About the Syria!

Have seen a pick recently in the news about syria when one soldier painted his diy luncher!

locked like a morter!

I bet it would be a pneumatic! :P
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Unread postAuthor: jackssmirkingrevenge » Mon Sep 02, 2013 11:16 am

Image

They certainly look like spudguns :D

For a second I thought that thing between the rear wheels of the thing was one of their wives :roll:
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Unread postAuthor: Gnarp » Mon Sep 02, 2013 12:34 pm

lol Haha!

I need to find the pic:P
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Unread postAuthor: jackssmirkingrevenge » Tue Sep 03, 2013 2:21 am

Some awesome LOSAT test firings, you might want to mute it though as the LAZOR sound effects get a bit tedious.

[youtube]http://www.youtube.com/watch?v=iiojguQy8pI[/youtube]

Image

The specifications are impressive.

The missile accelerates to 5000 feet per second, flies to maximum range in less than four seconds and delivers five times the kinetic energy of current tank rounds. The fire control system allows the gunner/commander to acquire and auto-track up to three targets. Once a launch consent is issued, the system automatically initializes and guides the missiles to the targets in a sequential manner. Range of the LOSAT missile is about 5 km.

The Kinetic Energy Missile weighs 174 pounds, is 113 inches long and 6.4 inches in diameter. The current system provides for a three-man crew, but a crew of two can also conduct engagements. With a missile speed of 5,000 feet per second, it reaches maximum range in less than five seconds. The LOSAT missile is a hit-to-kill missile with no explosive warhead. It carries a long-rod penetrator and destroys the target through the application of brute force.


Over 67 million ft lbs.

That's the equivalent to being hit by 22 shells from the legendary 88mm Panzerabwehrkanone 43 at the same time.

Who needs an explosive payload?
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Unread postAuthor: POLAND_SPUD » Tue Sep 03, 2013 6:11 am

Indeed very impressive - especially since time of flight to target is minimal so even if the target armoured vehicle notices launch it is already too late and better yet it makes it a lot harder for APS systems to intercept it

Over 67 million ft lbs.
That's over 9000 :D Seriously though its guidance system must respond very fast

EDIT
They aren't very specific when it comes to its guidance system - it seems it's SACLOS but how is communication between launcher and missile established ?
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Unread postAuthor: jackssmirkingrevenge » Tue Sep 03, 2013 7:54 am

POLAND_SPUD wrote:They aren't very specific when it comes to its guidance system - it seems it's SACLOS but how is communication between launcher and missile established ?


Its spiritual successor, the gun launchedMRM-KE, uses both laser and on-board guidance.

Keeping things high speed, here it is:

[youtube]http://www.youtube.com/watch?v=V3eV_ABhG_8[/youtube]

There interesting thing about rocket KE projectiles is that they have a minimum range. It's pretty much one of the reasons that the Gyrojet rocket projectiles flopped, at the muzzle you could stop them with a finger.
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Re: The Official High-Speed Camera Thread

Unread postAuthor: Ragnarok » Sat Nov 09, 2013 11:54 am

It occurred to me that I have almost no high-speed footage from my cannons. So I tried to make some.

Unfortunately, both dart projectiles I tried using decided to exploderise in the barrel and nothing really wanted to be properly on target, which made this the only half-decent shot of the day:

.
(Comes with sound too - I recorded it separately and matched it up afterwards).

The projectile was a 20mm steel rod, massing about 230g (8 oz); a very heavy projectile for the calibre, so the velocity was only a hair over 65 m/s (~215 ft/s) despite the 25 bar pressure. Still, that's ~500 Joules/370 ft-lb - not that it really shows, most of it being wasted by deflecting off and making a large hole in the ground just outside of frame.

The more interesting part was probably at the other end, the consequence of firing a half pound projectile from a 11 pound launcher. Suffice to say that the recoil was a little lively, probably close on 50 joules (about in the region of a .375 H&H).

EDIT: Yay. Figured out how to embed videos so they work on the new software.
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Does that thing kinda look like a big cat to you?
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Re: The Official High-Speed Camera Thread

Unread postAuthor: jackssmirkingrevenge » Sun Nov 10, 2013 8:28 am

Nice :) good ol' English greenery, I remember it well.
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Re: The Official High-Speed Camera Thread

Unread postAuthor: Ragnarok » Mon Nov 18, 2013 12:52 pm

Another video that I did about a week and a half back, but forgot to post.

HEAL, in her current configuration, weighs about 5 kilos (11 lbs) and is 126cm (49.5") long. However, that weight is all pretty well balanced around the grip, so HEAL can quite easily be held or fired similarly to a pistol.

This was a test of firing it one handed from the other day - I changed the footage to black and white because the colour sucked, but it does come with sound instead:



You can see the gas cutter* on the piloting QEV doing its job... and, if you look really closely, the vapour from the trigger valve, which makes it reasonably possible to work out the delay.

It's about three frames between the trigger exhaust to pilot exhaust and another three from there to muzzle exhaust - about 12.5 ms in each case. That's more of a delay than I expected from trigger to pilot (I'll have to look at why), but the timing from pilot to muzzle is as close to the expected value as measuring it to the nearest frame will allow.

*Okay, I admit it. It's a 15mm compression tee (minus olives/compression nuts) I screwed into the valve partly for aesthetics, partly to stop anything getting jammed in there. But it works - albeit not very well at reducing the volume next to the the shooter's head.
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