Contra Rotating Propellers using Six Helical Gears

[@brianb-p6586]

The Rolls Royce Griffon gearbox is similar, but a more clever variation that uses one less gear: it has a single idler gear replacing the driven and driving pinions (shown in yellow in this model) on the countershaft.

[@brianb-p6586]

Here's that variation:
_Contra Rotating Propellers using Five Helical Gears_
ua-cam.com/video/n2DI_nnJCks/v-deo.html

[@xlmachines120]

There are many possible configurations to achieve contra rotating systems.
You can see other contra rotating propeller designs here
Rolls Royce Griffon gear box model
Five Helical Gear Contra Propeller 5 Blade - 3D Animation
ua-cam.com/video/n2DI_nnJCks/v-deo.html
Six Helical Gear Contra Propeller 3 Blade - 3D Animation
ua-cam.com/video/Ae7DLLbKSoU/v-deo.html
Bevel Gear Contra Rotating Propeller 2 Blade - 3D Animation
ua-cam.com/video/d3b_WJD_Bvs/v-deo.html

[@benstone5650]

Awesome!

[@xlmachines120]

Thanks!

[@polka23dot70]

Nobody needs background music.