Re: Rubber lubes - general question

From: Ignacio Zelaya <izgo_at_yahoo.com>
Date: Thu, 03 May 2007 15:18:11 -0000

> Another question about the thick lubes would be
> how much weight do you add to an indoor motor
> when lubing with high viscosity lube? Since
> Fred flies F1D I guess the answer is not much,
> but I would guess you have to be careful.

Dont mix viscosity with density.

For example, a fluid can have a huge difference of
viscosity because temperature change and at the
same time the change in density will be very low.

Now, speaking about silicone, different silicone
viscosity is obtained by a mix of silicone oil
(dimethicone) and silica fume as a thickener.

Since silica fume has a lower density than silicone
oil, "IN THEORY", as thicker the silicone grease lower
will be its density. So, same volume of silicone oil
will be heavier than silicone grease.

Density:
Silicone oil (dimethicone) 965 kg/ m^3
Silica Fume (densified) 480 ~ 720 kg/m^3


What im asking myself all the time is if the
thick silicone oil (5000 cts) I bought it is
pure, non extra aditives, non harmful, etc


Regards.

Ignacio.
Received on Thu May 03 2007 - 08:20:04 CEST