Review Самостоятельное изготовление DPV буксировщика дайвера

[grantmac]

Enjoy. It would drive me bonkers and I'm sure the fish hear it too.

I was in the automotive field for 30 years (69 to 99). Too many whirs, rattles, bangs, air guns, and such. I value quiet above most else. I even drive an EV and need to figure out how to silence most of those alert noises, especially the seat belt not on, and the back up alarm.

Again, the actual experience is wildly different than you hear on video. I posted it as an example of the difference between a high pitched DPV.
It's literally quieter than OC and well worth getting places at speed or dealing with the huge currents we get.

 

[The Chairman]

Again, the actual experience is wildly different than you hear on video. I posted it as an example of the difference between a high pitched DPV.
It's literally quieter than OC and well worth getting places at speed or dealing with the huge currents we get.

I'm a North Florida cave diver. Currents are all I deal with. Well, not in Peacock, but Little River can be huge and Ginnie ain't nothing to ignore.

 

[BoltSnap]

Ginnie ain't nothing to ignore.

Can you please re-write this in proper English??? There are people from outside the US reading this

 

[The Chairman]

Can you please re-write this in proper English??? There are people from outside the US reading this

The Devil's Eye Spring system at Ginnie Springs in Florida can have a discharge rate of over 46 million gallons of water per day:

• Devil's Eye: A circular spring with a depth of 15 feet
  
  
• Devil's Ear: A spring located in the Santa Fe River, about 15 yards east of Devil's Eye

We call this a "high flow system". Trying to out-swim this is nigh onto stupid. If you know how, you'll easily get back to the Maple Leaf and more, about 900ft back. If you don't, you'll turn around at the park bench (200?) or the Lips (120ft?). The more you kick, the quicker you'll turn around. Current mitigation is the key.

 

[Михаил]

And, @Михаил, you taught me two new words today. Thanks!

Glad to help

 

[Михаил]

My dpv is quieter than OC, newer versions are even less. The exception would be above half throttle but then you get flow noise in your ears anyway.

Hello, when I was designing I didn’t think about the quiet operation of the scooter. I didn't think it was that important. Now I’m starting to design a new scooter and will focus on making it as quiet as possible.

 

[Михаил]

Очень круто Михаил!

Thank you

 

[Михаил]

One of the options for quieter operation of the scooter is to use a brushless motor with friction bearings, since ball bearings make little noise and do not exceed propeller speeds of 1500 - 2000 rpm. And use direct drive instead of gear drive. But a geared scooter also has its advantages: it drags and pulls like a tractor, but has a slightly lower speed compared to a direct-drive scooter. There is very interesting work ahead.

 

[Михаил]

And, @Михаил, you taught me two new words today. Thanks!

glad to help

 

[Михаил]

Genesis. But any brushless direct drive is fairly quiet. Even better with a sinusoidal controller which the newer ones have and mine doesn't.

This is with the camera next to the motor and we'll ahead of my regs at mostly half throttle. Compared to the whine on other units it's very quiet:

GoPro Shared Link

gopro.com

Your scooter is running a little quieter, it would be interesting to know what the speed is on the propeller. I had a camera mounted on the body above the engine, so all the vibrations are felt stronger and the speed on the propeller is approximately 2800. If your scooter has a manual, read it