Ravigneaux planetary gear train

[justforever96]

So, what does the orange gear attach to? It spins in the opposite direction? And what is the point of this whole setup...why not just a single-plane planetary? I can't quite wrap my head around it.=/

[PPGCSuicide]

Ich wollt schon immer mal wissen wie n Planetengetriebe funktioniert =)

[sifterbox]

what program are you using for all these?

[PelletierPhysics]

@sifterbox POV-Ray

[tonytiger75]

The transmission in a Model T Ford uses planetary gears for first gear and reverse.

[royman0007]

We use a planetary sytem for reduice the rotation speed and increased a torque. you can find it on a machine especialy Oilfield trucks

[quadcatfly]

does anyone know if planetary gear has more/less or about the same efficiency as spur gear (two meshing gears) of the same ratio?

[2l3]

A spur gear has straight cut teeth, Helical(at an angle) cut gears are stronger, quiter, but also more expensive to manufacture.

[DlSCONNECTED]

@2l3 False. They are not stronger.

[jayguy173]

all gears are 100 percent effienct the torque converter would boost torque but take away some hp

[AzzyAsi]

@jayguy173 False!

All gears, even bearings have losses in torque and power, but it most certainly won't lose speed (as in a hydro-transformer or any hydro-dynamic transmission)

[ray190te]

Just to let you know this gear set is used in some auto trans applications

[jonarc124]

what does this actually "do"?

[YourFatClownAss]

Well it can be used in a lot of different applications.

If you watch it carefully you will notice that the purple gear is turning counter-clockwise whereas the orange gear is turning clockwise.

Can be used in car gearboxes for reverse gear.

[2l3]

Simply there is an input(the motors input into the gear usually), an output usually another set of planetary gears, and a reaction or held member. That produce two gear reductions(more torque less speed), two overdrives(more speed less torque), and two reverse gears(of which we usually use one)