Quote:
Originally Posted by wildcard
high fps and high ROF don't mix especially in a version 2 gearbox I don't care who has said they have seen it done or from what mystical format they mod it to
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On the contrary, high fps and high RoF do mix and mix all the time, all over the world, and it's not magical at all. I hope to clarify on this a bit below...
First, the view that stock guns can't handle high fps and high RoF is absolute true, especially in the case of G&P guns which are sold with defective gears and yet are often short stroked or have extremely high torque motors mixed with high speed rotational velocity. I don't know what G&P's people are smoking, maybe they produced like a mountain of defective gears several years ago and haven't gotten rid of all of them yet
Second, the primary reason that the TM V2 design fails in high fps + high RoF is due to the fact that Tokyo Marui never designed this gearbox with today's RoFs and non-Japan velocities in mind. Pretty much everyone acknowledges this.
More on this later...
Before I get to that though, what most Canadian airsofters and ASC people in particular consider high RoF (25rps) and high velocity (400fps) is actually
the middle of the road in terms of where the edge of the "what can be built to run reliably" spectrum lies at the moment.
The statement that "
high fps and high ROF mix" is demonstrably false for the following reason: A large number of people have mastered this challenge and turned it into a repeatable process, one which is fairly scientific and in no way mystical.
Anybody here can build a 400fps/35rps gun and far
far beyond, and if you meet and talk to a few guys on this forum such as lurkingnight or stealth and others who have been active in this topic lately, you'll realize it's really a simple formula and we're preaching the same basic mechanical adjustments over and over and over and are trying to distill it down to a simple set of steps people can follow. My experience in hearing from fellow tinkerers on the field and on the forums indicates we just haven't adequately disseminated the information/tutorials/knowledge to make this an easily-repeatable process for everyone yet, but I'm trying as hard as I can to share my experiences and help guys get their high-intensity setups rock solid. Some may disagree with the specs of these guns, but those that do can officially give up their license to engage in reasonable discussions of how to make AEGs have good trigger response, or how to make them last through winter play, etc. We're doing these mods for a variety of reasons, many of them good, and to characterize this as "dumb ass shit" is callous. You're asking people to set down their tools, turn off their passion for pushing the mechanical extremes, and spend more money. Seriously bro:
FUCK that.
In broad strokes, here are Tokyo Marui's V2 design deficiencies:
- Pre-engagement of the sector gear with the piston due to the piston not being able to move fast enough.
- Incorrect angle of engagement with the piston and sector gear's pickup teeth, which should always be flat-face-on-flat-face but is instead in the default Tokyo Marui setup is a line of contact instead of a plane.
- Inadequate absorption of impact at the front of the gearbox, solved by systems like the STS or simply using sorbothane and correct cylinder-to-barrel volume matching. Most V2 gearboxes on the market now have extra material at the front of the cylinder window. Some manufacturers like G&G are radiusing the corners of the windows to increase the surface area where the stress occurs.
- Using the trigger contacts as a primary conduit of current from the battery to the motor. Easily solved with a MOSFET.
- One of my personal favourites, using the air seal nozzle as a mechanism to control BB input flow from the magazine. Defect is not limited to V2 but also V3 especially in the case of longer nozzles and weak tappet plate springs.
Each and every one of these is easily corrected with less money than a steak dinner in Toronto. Fix these issues, do some shimming, drink a beer and at the end of it you have a gearbox that can withstand high RoF and high fps. Sure, it takes time and attention to detail, but there's no need to call this mysticism or dumb. We're hobbyists for goodness sake.