Mechanical pre-cocking

[Star_folder]

psh, 3 bucks... I could just put it up for sale on a few forums and see how much I can get for it...

[Skywalker]

Arg

[Star_folder]

lol, poor thing. You could just spend the $30 to have a gear set shipped to you and just modify it yourself. It's not like it's really that hard.

[Skywalker]

Haha I know. I don't really know if I need it anyway... Idk if it would hold up under a sp170

[Star_folder]

Only one way to find out if this gear will. But my SHS gears are hold up to it.

[Dominum]

Sorry I missed this guys.

It seems like to me the simplest way to do this would be to use an extended (18) tooth sector gear and remove the two teeth from the wrong side, making the nub that engages the cutoff lever sit further forward, causing it to stop the cycle prior to release of the piston. This would make an AEG precocking with the modification of only one part. Are we to presume this is the method you used Star, or did you devise some other mechanical way? I guess you could machine a cutoff lever that engages further forward, but you would have to make it from scratch...

[Star_folder]

Sorry I missed this guys.

It seems like to me the simplest way to do this would be to use an extended (18) tooth sector gear and remove the two teeth from the wrong side, making the nub that engages the cutoff lever sit further forward, causing it to stop the cycle prior to release of the piston. This would make an AEG precocking with the modification of only one part. Are we to presume this is the method you used Star, or did you devise some other mechanical way? I guess you could machine a cutoff lever that engages further forward, but you would have to make it from scratch...

This is exactly the method I used, only, you have to remove 3 teeth for it to match up with a normal piston. With several L85s laying around, extra gears, and a few pieces and parts l85s, I have a few sector gears lying around. So I decided to try it out. I too think this is the easiest way, probably the cheapest as well. Considering you can pick up L85 gears for relatively cheap, all you need to do is cut off a few teeth and there you go.

As for how it did with an 8.4v, it did great, worked perfectly. No over spin, no underspin, stopped with the piston pulled back, shot, reloaded, and pulled the piston back again.

[Dominum]

Cool, I may try that. Since you need to remove three teeth for the cutoff nub to align, I assume you lose a little bit of FPS since the piston is not pulled all the way back to the last tooth? I guess you could just compensate by adding a spacer though...

When I do my P90 DMR build there is a possibility I will use this, although I would rather use helical gears which would mean I would be using a standard sector gear. I may just go for something programmable instead.

[theboss62]

King Kong the programmable mosfet

[SteevoLS]

The only, repeat ONLY, advantage of the King Kong MOSFET over something like a Extreme Fire or AWS MOSFET is the plug and play aspect. Since (in doing that), it loses the benefits of the MOSFET itself, it's really a waste of $70. Admittedly you can wire it in, but if you're doing that you might as well go buy a Extreme Fire MOSFET with years worth of excellent customer service and reliability to back it up.

[Star_folder]

The only, repeat ONLY, advantage of the King Kong MOSFET over something like a Extreme Fire or AWS MOSFET is the plug and play aspect. Since (in doing that), it loses the benefits of the MOSFET itself, it's really a waste of $70. Admittedly you can wire it in, but if you're doing that you might as well go buy a Extreme Fire MOSFET with years worth of excellent customer service and reliability to back it up.

This, all of this. And even more of this. This.

@dom. You don't lose any power. Actually, the G&G L85 variants use extended 19 tooth pistons. To be able to use the sector gear with a normal length set up, you've already got to remove three teeth. Also, the gear by default has precocking, so all you need to do is short stroke teeth off the front of the gear, and you are good to go.

Yes, this means you'd have to use straight gears, but I've been doing it for years without any problems.

[Skywalker]

I bet riotsc could make one quite easily also... just take one of his gearsets and rotate the location of the sector teeth.

I don't know if he already has a helical set of gears or not

[Dominum]

WTF? 19 teeth? I knew they were weird but that is crazy. All the other extended GB's use 18 teeth. As far as removing them from the wrong side, I was thinking of using a CA extended sector gear (because I have one). Didn't know L85s were 19 though... they get more funky every time you bring them up. I'll have to open one sometime.

[Skywalker]

We <3 funktastic gearboxes

[Star_folder]

Yeah, actually all extended gearboxes have 19 tooth pistons.

Just kind of randomly pulled this link, but if you see, there are 19 teeth on the piston, which is for a PSG-1.
http://www.airsoftextreme.com/store/ind ... ts_id=1267

As far as I know, all elongated pistons have 19/18 teeth, and all normal pistons have 16/15 teeth. I guess it just depends on how you count it, but they are all the same size.

I'm not sure how using an SR-25 Sector gear would work, I guess if you took the time to see how the gear engages the cut off lever, and then remove teeth in such a way that they will hold a normal sized piston back when they are cut off. I may try it out. I have a set of SHS SR-25 gears lying around from a mistake, I may take some time to check them out.