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heat probe
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nuckolls.bob(at)aeroelect
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PostPosted: Sat Nov 21, 2020 12:12 pm    Post subject: heat probe Reply with quote

At 06:29 PM 11/20/2020, you wrote:
Quote:
--> AeroElectric-List message posted by: "bobnoffs" <icubob(at)gmail.com>

I admit adding a chip detector is a stretch but I think a temp probe could be valuable. You are not looking for absolute temp but a trend compared to engine oil temp.
If I had a gearbox with a hx of failure I would probably be looking for another gearbox. Kind of like having an engine oil analysis. Maybe I will see something coming


Does this gearbox have a history of failures?
Has root cause been identified? If a chip
detector has been deemed the most practical
impending failure warning system, does the
generation of metal in the oil flow
pose a risk to the engine? Should the oil
return line be filtered? If so, would it not
be more practical to add a filter with a
chip detector?



Bob . . .

Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"


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bobnoffs



Joined: 04 Jul 2012
Posts: 121
Location: northern wi.

PostPosted: Mon Nov 23, 2020 1:48 pm    Post subject: Re: heat probe Reply with quote

well, here's where i am at. the gearbox feeds the oil sump with a 1/2''id hose. the run is about 18'' long. my plan is to install a tee with hose barbs as close as possible to the gearbox. maybe insulate the barb and hose to the gearbox. some kind of pattern will develop. gearbox at cruise when 60 deg oat runs 20 cooler than coolant, runs the same as coolant etc. i should be able to get a meaningful warning by watching those numbers. maybe not as good as a closed gearbox but way better than ''do you smell something hot?''
i am also thinking of another tee downstream , close to the sump. a magnetic plug will have to do. again, way better than nothing.
final fittings and hookup will remain to be seen until i begin actually taking the oil line apart.
thanks to all for the suggestions, it really helped.
bob noffs


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manishajay



Joined: 13 Nov 2020
Posts: 1

PostPosted: Tue Nov 24, 2020 9:16 pm    Post subject: Re: heat probe Reply with quote

Nice Information Your first-class knowledge of this great job can become a suitable foundation for these people. I did some research on the subject and found that almost everyone will agree with your blog.

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