[Stoves] The PROTOS Plant Oil Cooker

[David G. LeVine]

At 03:29 PM 4/30/2007, you wrote:
>I also have not heard of castor oil binding itself to metals. I used
>castor oil fuels in model aircraft engines when I was a kid and had
>no such problems, nor drained any engines after each flight.

Model aircraft engines are generally 2 cycle with no sump, hence 
nothing to drain.

Bonding to metal is not a bad thing in a model engine, it makes the 
metal slippery and prevents galling.  Just because there is a few 
molecule thick layer of castor oil does not mean the whole mass polymerized.

In the early engines lubricated by castor oil, the draining was 
needed because the oil in the sump would congeal and not flow until it got hot.


David G. LeVine
Nashua, NH  03060