The silicone viscosity seems to affect a bit the lubrication
"efficiency". I have been lubing my F1B motors for quite some time with
thick (12500 to 14000cTs) silicone. I use a knot that is tied to a lubed
rubber strip, as the knot would cut through unlubed strip. I have found
some problems with my knots slipping during motor break-in (by
stretching) when I have tied the knot to motor lubed with said silicone.
When I use thinner (500cTs) silicone to first lube the motor ends for
tying the knot, then use thicker for lubing the rest of the motor, the
knots hold better. My hypothesis is that the thinner silicone lubes the
knot until it is really tight, but then in the end the knot cuts through
the silicone and grabs. Thicker silicone lubes a tighter knot and
prevents it from grabbing. Thus I conclude that thicker silicone lubes
better.
-Tapio-
On 20/12/2017 16:41, leop_at_lyradev.com [Indoor_Construction] wrote:
> FAI Model Supply sells silicone oil in a low and a high viscosity
> grade. The low is 500 cSt and the high is 5000 cSt. I have been
> using the 5000 cSt oil for all classes since I started out over ten
> years ago. Many indoor fliers today use the thinner 500 cSt but this
> is more a matter of personal preference. In practical terms, the
> difference in viscosity between 5000 cSt and 500 cSt is the difference
> between the viscosity of SAE 50 motor oil at 32F and 70F. Note that
> silicone oil does not show such a viscosity change with temperature.
Received on Wed Dec 20 2017 - 19:36:15 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:49 CET