Quote:
Originally Posted by venture
I just read some gear talk and I read that helical gears are quieter than straight gears in transmissions, so part of my theory could be wrong.
I can find quotes of people saying both. My thoughts in my previous post (more contact area) are why I believed the louder theory. I don't know what to think now?? ENGINEERS? PHYSICISTS?!? PLEASE WEIGH IN!
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I agree, I've seen both.... Wikipedia, for one, says helical gears are quieter than straight/spur cut gears. I guess I'm going to wait till i get through 100,000 and see if they "break in" and get quieter like Reckless said, although I highly doubt it... but I'm still a novice so...
I'm running an Hk416 CQB by VFC/umarex with the stock spring, which is shooting 300fps.... It's advertised to shoot 330-360. During the beginning of this helical upgrade journey, my gearbox kept locking as I couldnt get the shimming right. I left it for the next morning and when I opened it up the next day, I noticed the piston was locked back, spring compressed. I had let it sit the night like that!! I opened up expectiing to have to buy a whole new GB but to my dismay everything was fine. I think that's what dropped my spring... I have a systema m120 non-linear spring around and I'm wondering if my motor can take it.
Quote:
Originally Posted by ThunderCactus
Helicals by nature arent as loud as straight cut
However, being fairly new to this, how do you know it's the gears making the noise, and not the pinion-bevel engagement?
There's an incredibly obvious difference in sound between a gun with a low set motor height, and a gun with a properly set motor height. It becomes much quieter once you adjust the motor.
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If you check the photos in the thread I linked, you'll see how I adjusted the motor. That method is pretty much failproof as opposed to playing with it and judging it's adjustment by the sound it makes.
I have a professional-level condenser microphone around, maybe I can record firing a couple shots and put it up?
June 14th, 2011, 00:14
