Planetary Gear Box's

[rwtdiver]

Good choice on your ESC!

I have used it on all my brushless motor propulsion systems on my WTC!

Rob
"Firemen can stand the heat."

[Sinksalot]

Nice....

What onboard voltage to the ESC? SLA 6V, 12V, 2s Lipo, 3s Lipo?? Need to correspond that 500KV with the voltage range she's seeing.

I'm a big fan of Engel components.

Two brushless ESCs from Amazon about $25 each running at 6v with 15,000 mAh nimh battery. I later switch the ESCs to two Mtroniks G2 Hydra50 ESCs. Way, way overkill as thats 100amp together. I did it because I said what the hell. I may bump to 20,000 mAh of power, again why not.

This was the ESC I bought from amazon. Bidirectional 40A Brushless ESC

https://www.amazon.com/gp/product/B08HWQ58QX

[Subculture]

You just need a BLHELI32 ESC. That will run a brushless motor down to the point where you count the revs. Sensorless brushless esc's have come on a long way in the last few years. The very best smooth running is achieved with motors with as many poles as you can fit in the footprint, but 14 poles is sufficient for good smooth running.

[QuarterMaster]

I will try to make a recording of the speed of the props from 1% to 100%. But even at Subfest the props were able to move very slow to fast in a smooth way. You can see the props moving smooth and slow in the water in this video with those motors.

https://youtu.be/FCm9EbtKAuU

Nice....

What onboard voltage to the ESC? SLA 6V, 12V, 2s Lipo, 3s Lipo?? Need to correspond that 500KV with the voltage range she's seeing.

I'm a big fan of Engel components.

[Sinksalot]

Will it soft start and rotate (at 1-2 click throttle) at such a speed you see the individual blades? Or does it jump right off with no low end?

I will try to make a recording of the speed of the props from 1% to 100%. But even at Subfest the props were able to move very slow to fast in a smooth way. You can see the props moving smooth and slow in the water in this video with those motors.

https://youtu.be/FCm9EbtKAuU

[trout]

This is an oldie, but used a lot in older subs.......

https://mpjet.com/shop/gb/882-planetary-gearboxes

[QuarterMaster]

On my Engel Type IX, it came with a brushed motor geared setup. But we didnt like the geared system and went with two robbe 500kv brushless motors. The torq at low speed is great and it moves nice with no gearbox.

Will it soft start and rotate (at 1-2 click throttle) at such a speed you see the individual blades? Or does it jump right off with no low end?

[Sinksalot]

On my Engel Type IX, it came with a brushed motor geared setup. But we didnt like the geared system and went with two robbe 500kv brushless motors. The torq at low speed is great and it moves nice with no gearbox.

[Schmitty1944]

Another source for planetary and offset gearbox's:

https://mpihobby.com/products/acc4036-planetary-gear-boxes?_pos=2&_sid=a5253211b&_ss=r

https://mpihobby.com/products/offset-gear-boxes?_pos=1&_sid=a5253211b&_ss=r

Jason

[QuarterMaster]

Yes it will be somewhat noisy but we are not exactly trying to evade an enemy here.

True dat, lived with it for many years. That cylinder lived almost 15 years.


Of course there's the occasional query, "Ed' what's up with your reactor plant? Sounds Russian...."

[He Who Shall Not Be Named]

Running gear. A look back:

[Subculture]

The set-up you have looks absolutely fine. A planetary gearbox is useful if space is tight.

Any gear noise will be marginal from a single gear stage and much lower when running in the wet.

[SubDude]

Planetary gearboxes

https://www.aliexpress.com/w/wholesale-planetary-gearbox.html?catId=0&initiative_id=SB_20230424131114&SearchText=planetary+gearbox&spm=a2g0o.home.1000002.0

Also you can 3d print gears in herringbone pattern which are nice and quiet amd stronger than straight cut. Some designs on thingiverse used for gearing steppers etc. which could be adapted or grow your own using Fusion 360 gear generator.

A free script called GF Gear Generator allows for creating all kinds of custom gears in Fusion 360 and yes there are quieter gears than plain spur gears. I may give that a try but I need to run it as is first to see if another gear type will be an improvement. It should be easy enough to swap out.

[Subculture]

Planetary gearboxes

https://www.aliexpress.com/w/wholesale-planetary-gearbox.html?catId=0&initiative_id=SB_20230424131114&SearchText=planetary+gearbox&spm=a2g0o.home.1000002.0

Also you can 3d print gears in herringbone pattern which are nice and quiet amd stronger than straight cut. Some designs on thingiverse used for gearing steppers etc. which could be adapted or grow your own using Fusion 360 gear generator.

[SubDude]

Yes it will be somewhat noisy but we are not exactly trying to evade an enemy here.