Today's Message Index:
----------------------
1. 03:17 AM - Salt water corrosion (Scott Perkins)
2. 10:16 AM - seaplane rust prevention (Lee Taylor)
Message 1
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| Subject: | Salt water corrosion |
--> Seaplane-List message posted by: Scott Perkins <2scott@bellsouth.net>
There are problems inherrent with simply "switching" to stainless.
Stainless steels are not as strong as 4130 nor as hard as the best
"bearing" steels. So re-engineering has to be done to assure
adequate strengths. For equivalent strength metal components
this will result in heavier components.
Scott
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> Seaplane-List Digest Archive
> ---
> Total Messages Posted Wed 01/19/05: 2
>
>
> Today's Message Index:
> ----------------------
>
> 1. 01:05 AM - Amphibious floatplane gear bearings ()
> 2. 06:57 AM - Re: Amphibious floatplane gear bearings (Robert Laird)
>
>
>
> ________________________________ Message 1 _____________________________________
>
> Time: 01:05:51 AM PST US
> Subject: Seaplane-List: Amphibious floatplane gear bearings
> From: <max.johansson@nokia.com>
>
> --> Seaplane-List message posted by: <max.johansson@nokia.com>
>
> Hello old salts on this list
>
> I am presently building a 701 floatplane on Czech amphibious floats.
> My friends bought exactly the same plane ready-to-fly from CZAW,
> After a year they have already experienced multiple roller bearing
> failures of the float main wheels and corrosion of all landing gear axles.
>
> This might have to do with using the plane in brackish water
> and as I will need to land in salt water too, I am very interested
> to hear about what can be done as prevention.
>
> For example, using other bearings and axles than the stock ones,
> using certain protective oils and procedures, perhaps a change to
> nylon wheels etc. Any suggestions and experiences are welcome.
>
> rgrds
> Max
>
> 701SP-QBK with 912S
> builder in Helsinki
>
> ________________________________ Message 2 _____________________________________
>
> Time: 06:57:19 AM PST US
> Subject: re: Seaplane-List: Amphibious floatplane gear bearings
> From: "Robert Laird" <rlaird@cavediver.com>
>
> --> Seaplane-List message posted by: "Robert Laird" <rlaird@cavediver.com>
>
> I'm not expert at all, but given the extreme lack of participation on this list,
> I'll step up to the plate and offer this: On my Aventura, the legs are nickel-coated
> to resist corrosion from the salt spray, so -- although I know it's
> stating the obvious -- it would seem to be a matter of selecting the correct
metals,
> e.g., instead of standard bearings, get stainless steel bearings, etc.
> My only personal experience has been with nickel-plated steel, and 316 stainless
> steel, and both of those hold up very well against salt water corrosion.
>
> -- Robert
>
> -------- Original Message --------
> > From: max.johansson@nokia.com
> > Sent: Wednesday, January 19, 2005 2:07 AM
> > To: seaplane-list@matronics.com
> > Subject: Seaplane-List: Amphibious floatplane gear bearings
> >
> > --> Seaplane-List message posted by: <max.johansson@nokia.com>
> >
> > Hello old salts on this list
> >
> > I am presently building a 701 floatplane on Czech amphibious floats.
> > My friends bought exactly the same plane ready-to-fly from CZAW,
> > After a year they have already experienced multiple roller bearing
> > failures of the float main wheels and corrosion of all landing gear axles.
> >
> > This might have to do with using the plane in brackish water
> > and as I will need to land in salt water too, I am very interested
> > to hear about what can be done as prevention.
> >
> > For example, using other bearings and axles than the stock ones,
> > using certain protective oils and procedures, perhaps a change to
> > nylon wheels etc. Any suggestions and experiences are welcome.
> >
> > rgrds
> > Max
> >
> > 701SP-QBK with 912S
> > builder in Helsinki
> >
> >
> Message: seaplane-list@matronics.com
>
>
>
>
>
>
>
>
>
>
>
Message 2
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| Subject: | seaplane rust prevention |
--> Seaplane-List message posted by: "Lee Taylor" <leetay@comcast.net>
Not an expert in this area, but here is my two cents worth.
On all bearings and bearing surfaces, use Automotive Boat
Trailer Wheel Bearing Grease.
Boat trailer wheel bearings have the absolute worst possible
environment---e.g. they sit for long periods of time, then have to
support their tiny wheels to astronomical speeds for long periods of
time. Then they get totally immersed in water, and drive home
undrained, to sit for long periods of time AGAIN. This is very similar
to what happens with aircraft. Seaplane bearings, especially.
A friend, George Pierra of Osprey fame, was building his new
plane in his garage when a flood submerged everything, including his
newly-built landing gear shock struts. These were spring-loaded struts,
so didn't have any seals. He had assembled them with boat trailer wheel
bearing grease.
Six months after the flood, George finally got back to his
struts, KNOWING that with sitting around for six months loaded with that
really filthy flood water, he was going to have to completely do them
over.
Took them apart, and they were PRISTINE! No corrosion at all.
I have been using this grease on all my wheel bearings for many years.
Since starting, I haven't replaced a single bearing for any reason.
Lee Taylor
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