Prop shaft

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TFF

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Apr 28, 2010
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Tail gearboxes, All depends on brand. Examples. Jet Rangers reduce rpm and change direction. Enstrom is 1 to 1, direction change only. Robinson is slightly increasing rpm; mainly to keep gear wear even. All depends on when designing and what was needed.
 

DangerZone

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Sep 5, 2011
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Zagreb HR
I think the discussion was about the long shaft down the tail cone to the tail rotor not the tail rotor rpm.
I expect the 90 degree gear box to the tail rotor would likely have a step up or step down gear ratio. Maybe not.

DZ, do you know if the tail shaft and tail rotor are a 1:1 speed ratio? Thanks for the input.
Is this about the main shaft and the tail rotor, or some other ratio? The main shaft and the tail shaft have different speed ratios, ranging from 1:3 to 1:6 depending on blade size and model. Some could be a 1:1, there are many different systems.
 
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