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-   -   Film: 1950s Army planetary gear demonstration model (https://ecomodder.com/forum/showthread.php/film-1950s-army-planetary-gear-demonstration-model-32250.html)

California98Civic 06-26-2015 12:20 AM

Film: 1950s Army planetary gear demonstration model
 
Learning about planetary gears by trying to visualize how they work, and I came across this neat old training film. Seems I'm not alone in needing animation to understand!

https://www.youtube.com/watch?v=SrkzaQRDtuM

And here is a different and also excellent demonstration, using computer animation:

https://www.youtube.com/watch?v=UakeTEJlXGw

pgfpro 06-26-2015 10:32 AM

I Love this stuff!!!

It amazes me how much advancements were made and discovered in the early 40's through the late 50's.:thumbup:

I think planetary gears transmissions auto type transmission are just the perfect package. Compact and strong as Hell.:cool:

some_other_dave 06-26-2015 02:54 PM

I've never been a big fan of planetary gear sets. But it's possible that's because I associate them with automatic transmissions, which I strongly dislike...

-soD

California98Civic 06-26-2015 04:08 PM

Quote:

Originally Posted by some_other_dave (Post 484945)
I've never been a big fan of planetary gear sets. But it's possible that's because I associate them with automatic transmissions, which I strongly dislike...

-soD

Me too. Dislike. But my electric bike has a set in the hub motor, and I am trying to understand the mechanism to understand how to hack it. :D

darcane 06-26-2015 07:00 PM

Quote:

Originally Posted by pgfpro (Post 484920)
I Love this stuff!!!

It amazes me how much advancements were made and discovered in the early 40's through the late 50's.:thumbup:

I think planetary gears transmissions auto type transmission are just the perfect package. Compact and strong as Hell.:cool:

Yes, quite so...

Did you notice that explanation of the two-input planetary gearsets used in tanks? That's exactly how Toyota's groundbreaking Hybrid Synergy Drive works (specifically the "Power Split Device").

Toyota Prius - Power Split Device

darcane 06-26-2015 07:09 PM

Quote:

Originally Posted by some_other_dave (Post 484945)
I've never been a big fan of planetary gear sets. But it's possible that's because I associate them with automatic transmissions, which I strongly dislike...

-soD

Some of the most robust manual transmissions use planetary gearsets. In drag racing, Lenco transmissions are used on very high powered cars because conventional manuals won't handle the torque. The reason they can handle the torque are planetary gear sets.

gone-ot 06-26-2015 08:33 PM

This is "how" the differential-gearset (left) is related to the planetary-gearset (right, ala' Prius):

http://www.odts.de/southptr/gears/planetary.gif

California98Civic 06-26-2015 08:41 PM

Quote:

Originally Posted by darcane (Post 484968)
Some of the most robust manual transmissions use planetary gearsets. In drag racing, Lenco transmissions are used on very high powered cars because conventional manuals won't handle the torque. The reason they can handle the torque are planetary gear sets.

That's a pretty cool detail. My "dislike" was only about the classic auto. CVTs attract me, a little. But I had no idea planetary gears were going into manual transmissions for drag racing. Here are a couple Lenco tranny images...

http://www.lencoracing.com/images/Xpld1.jpg

http://i.ytimg.com/vi/7kR4siGvUfI/hqdefault.jpg


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