Did you know there is oil in the rotor blade root

Two-seat R22 and four-seat R44 helicopters.

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Eddybear
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Did you know there is oil in the rotor blade root

Unread post by Eddybear » Mon Sep 22, 2014 11:18 am

While doing a pre-flight, I noticed oil leaking down the R44 rotor mast.
At first could not figure out where this was coming from, but later saw that it came from the rubber boots protecting the spindles at the rotor hub.

We had a leak at one of the rubber boots.

I was taught to climb up there and inspect, but never ever did somebody explain to me that those boots are filled (like in completely filled) with oil.
Last edited by Eddybear on Mon Sep 22, 2014 2:14 pm, edited 1 time in total.
heloduster
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Re: Did you know there is oil in the rotor hub

Unread post by heloduster » Mon Sep 22, 2014 12:26 pm

the Boots are NOT oil filled the spindle hub is
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csparksfly
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Re: Did you know there is oil in the rotor hub

Unread post by csparksfly » Mon Sep 22, 2014 1:53 pm

more interesting reading here found in the online Robinson Maintenance manual:
http://www.robinsonheli.com/r44_mm.html

or more directly:
http://www.robinsonheli.com/manuals/r44_mm/r44_mm_9.pdf
Eddybear
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Re: Did you know there is oil in the rotor hub

Unread post by Eddybear » Mon Sep 22, 2014 2:07 pm

You are quite correct heloduster, the spindle hub (or cavity or whatever) is filled with oil, and the oil is contained within this hub by means of the boots.

The point that I was trying to make is that I think that there are very few Robbie drivers that know that there is oil up there.
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Rotor Mad
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Re: Did you know there is oil in the rotor hub

Unread post by Rotor Mad » Thu Dec 18, 2014 3:54 pm

Eddybear wrote:You are quite correct heloduster, the spindle hub (or cavity or whatever) is filled with oil, and the oil is contained within this hub by means of the boots.

The point that I was trying to make is that I think that there are very few Robbie drivers that know that there is oil up there.
The oil is not contained by the rubber boots.
They only keep dust off the bearings up there
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Eddybear
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Re: Did you know there is oil in the rotor blade root

Unread post by Eddybear » Fri Oct 14, 2016 1:47 pm

Interesting. So how is the oil contained up there?
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Re: Did you know there is oil in the rotor hub

Unread post by Eddybear » Fri Oct 14, 2016 2:02 pm

csparksfly wrote:more interesting reading here found in the online Robinson Maintenance manual:
http://www.robinsonheli.com/r44_mm.html

or more directly:
http://www.robinsonheli.com/manuals/r44_mm/r44_mm_9.pdf
Thanx Craig. Nice info!

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