Slow motion camera + GBB

BBS · February 13th, 2008, 23:30

i've always wanted to see what happens

YouTube - Airsoft GBB slow motion

YouTube - Airsoft GBB slow motion 2

hope its not a repost. enjoy.

ChiefInTrees · February 13th, 2008, 23:33

nice find. Hicapa is hawt

arman · February 14th, 2008, 00:02

!!!SEXYTIME!!!

KEVORKIAN · February 14th, 2008, 00:20

That's about as fast as a GBB on duster performs !!!

Shinjin_MC · February 14th, 2008, 00:23

was always wondering if koba's 'pre shoot' system really resulted in zero slide movement until the bb leaves the barrel

looks like a few miliseconds before the bb leaves the slide starts to shimmy just very slightly

Andres · February 14th, 2008, 00:24

Finally... neat stuff.

skalnok · February 14th, 2008, 01:25

sweet

video = sexy time

hattrick · February 14th, 2008, 01:32

thead jack, who wants one of these? (Group order perhaps?)

YouTube - P-90 rubberband edition gun

LUTNIT · February 14th, 2008, 01:58

Black and white and grainy...would be nicer if someone had access to the new Casio camera. Can take 6MP pics at 60fps and digital video at up to 1200fps, normal TV broadcasts and such are usually 26 or 29 point something fps.

MadMax · February 14th, 2008, 02:00

Very interesting videos. Video two appears to show the slide recoiling before the bb leaves the barrel. There may be a case for stretching the reed valve spring a bit to retard the blowback phase a bit to space out the fire and recoil phases more.

ILLusion · February 14th, 2008, 19:57

Quote:

Originally Posted by Shinjin_MC

was always wondering if koba's 'pre shoot' system really resulted in zero slide movement until the bb leaves the barrel

looks like a few miliseconds before the bb leaves the slide starts to shimmy just very slightly

That's essentially how almost all modern GBB's work: The cycling process doesn't actually begin until the projectile leaves the barrel, at which point a negative pressure is created in the barrel, causing the floating/rocket/reed valve to close and transferring the gas to the blowback system.

Real steel is based on a similar system.

Neat video, though. Good to see that the system functions as theorized.

The Saint · February 14th, 2008, 20:02

So does this mean reports of enhanced recoil spring resulting in increased fps are flukes or misunderstandings?

Styrak · February 14th, 2008, 20:07

Quote:

Originally Posted by Shinjin_MC

was always wondering if koba's 'pre shoot' system really resulted in zero slide movement until the bb leaves the barrel

looks like a few miliseconds before the bb leaves the slide starts to shimmy just very slightly

Just like real guns...

ILLusion · February 14th, 2008, 20:33

Quote:

Originally Posted by The Saint

So does this mean reports of enhanced recoil spring resulting in increased fps are flukes or misunderstandings?

Yeah, whoever says that has no idea what they're talking about, unless they're using an OOOOOOOOLD classic GBB system that fires gas in to both areas of the gun at the same time. I haven't seen a gun do that since MGC's guns back in the late 80s/very early 90s.

MadMax · February 14th, 2008, 21:47

Actually almost every GBB partially pressurizes the blowback mechanism before they snap into recoil mode. Only Magna GBBs have a distinct pressurization of only the breech or recoil pneumatics. Even recent TM GBBs have a mid station reed valve which snaps forward. In the rearwards position, gas pressure is applied to the recoil assembly. If it didn't, there would be no pressure to shove the reed valve forward when breech pressure dropped.

If that video is of a TM hicapa, I'd say that the reed valve wasn't stiff enough. It looks like the slide starts its recoil just before the pellet exits the barrel in the 2nd video.

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February 13th, 2008, 23:30	#1
BBS Trader rating Join Date: Aug 2006 Location: BC, Canada	Slow motion camera + GBB i've always wanted to see what happens YouTube - Airsoft GBB slow motion YouTube - Airsoft GBB slow motion 2 hope its not a repost. enjoy.

February 13th, 2008, 23:33	#2
ChiefInTrees Trader rating Join Date: Dec 2007	nice find. Hicapa is hawt __________________ There are no such things as dead bodies. There are only zombies who are too afraid of Bruce Campbell to get up.

February 14th, 2008, 00:02	#3
arman Trader rating Join Date: Nov 2006 Location: Windsor, Ont.	!!!SEXYTIME!!! __________________ playing with my kid!

February 14th, 2008, 00:20	#4
KEVORKIAN Trader rating Join Date: Nov 2006 Location: Manitoba	That's about as fast as a GBB on duster performs !!! __________________ Kevorkian I SUPPORT THE USE OF SILICA BB BASTARDS!

February 14th, 2008, 00:23	#5
Shinjin_MC Trader rating Join Date: Dec 2003 Location: sauga, on	was always wondering if koba's 'pre shoot' system really resulted in zero slide movement until the bb leaves the barrel looks like a few miliseconds before the bb leaves the slide starts to shimmy just very slightly

February 14th, 2008, 00:24	#6
Andres Trader rating Join Date: Aug 2006	Finally... neat stuff.

February 14th, 2008, 01:58	#9
LUTNIT Trader rating Join Date: Dec 2005 Location: Ottawa	Black and white and grainy...would be nicer if someone had access to the new Casio camera. Can take 6MP pics at 60fps and digital video at up to 1200fps, normal TV broadcasts and such are usually 26 or 29 point something fps.

February 14th, 2008, 02:00	#10
MadMax Delierious Designer of Dastardly Detonations Trader rating Join Date: Dec 2001 Location: in the dark recesses of some metal chip filled machine shop	Very interesting videos. Video two appears to show the slide recoiling before the bb leaves the barrel. There may be a case for stretching the reed valve spring a bit to retard the blowback phase a bit to space out the fire and recoil phases more. __________________ Want nearly free GBB gas?

February 14th, 2008, 20:02	#12
The Saint Trader rating Join Date: Jan 2005 Location: Quebec	So does this mean reports of enhanced recoil spring resulting in increased fps are flukes or misunderstandings? __________________ "The Bird of Hermes is My Name, Eating My Wings to Make Me Tame."

February 14th, 2008, 21:47	#15
MadMax Delierious Designer of Dastardly Detonations Trader rating Join Date: Dec 2001 Location: in the dark recesses of some metal chip filled machine shop	Actually almost every GBB partially pressurizes the blowback mechanism before they snap into recoil mode. Only Magna GBBs have a distinct pressurization of only the breech or recoil pneumatics. Even recent TM GBBs have a mid station reed valve which snaps forward. In the rearwards position, gas pressure is applied to the recoil assembly. If it didn't, there would be no pressure to shove the reed valve forward when breech pressure dropped. If that video is of a TM hicapa, I'd say that the reed valve wasn't stiff enough. It looks like the slide starts its recoil just before the pellet exits the barrel in the 2nd video. __________________ Want nearly free GBB gas?

Slow motion camera + GBB

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