Jump to content

Twin Turbine Planetary Gear

Recommended Posts

I am doing some analysis on planetary gears for my rotordynamics class and now I am on a mission to find a picture of gearbox internals from a twin turbine helicopter. Does anyone have a picture or exploded diagram of how two turbines are connected to one main rotor? I am particularly interested in the gear layout.






Link to post
Share on other sites
They new light twin turbines (427,429) have one single big gear with two input pinions that have freewheeling clutches on them. So there is no planetary reduction at all.


So the freewheeling clutch allows for any small difference in turbine speed and also allow one turbine to still power the rotor if the other fails?


Also, are there additional gear reductions in the transmission? I hope this is not too dumb of a question but I have never seen the inside or a helicopter gearbox.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...