Synthetic in place of castor  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> RC Fuels >> Synthetic in place of castor
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Synthetic in place of castor - 6/28/2002 10:20:52 AM   
bobi


 

Posts: 224
Joined: 4/9/2002
From: bangkok, THAILAND
Status: offline 		I normally use 20% castor oil in the fuel. Came across some good points about synthetic .
Just wonder what exactly is "synthetic" . ?? What is the characteristic, properties ? If i had to go and buy synthetic what exactly do i have to say / look for ?

Thanking you in advance.

bobi
       Post #: 1

Synthetic in place of castor - 6/28/2002 8:37:30 PM   
downunder-RCU



Posts: 1125
Joined: 12/27/2001
From: Adelaide, South Australia
Status: offline 		Well I'm tempted to say that the only good point about synthetics is that they come in pretty colours...but I won't
The only synthetics I'd ever use are the ones made for full size gas turbines. These are the only ones that can match castor as a lubricant. There's an exceptionally good discussion about the relative merits on SSW at the moment...except that at the moment the site has been down the last couple of days
So from memory...the characteristics of synthetics is that at a relatively (compared to castor)low temperature they begin to break down into the original components which most certainly weren't lubricants. Castor breaks down into other lubricants (the dreaded varnish is actually a lubricant). Synthetics, excluding gas turbine oils, will boil off the liner on a lean run and then burn. Duke Fox did some tests and found that the wrist pin area of the piston can be 700F on a fast lean run..hundreds of degrees above the point that synthetics are useless.

When SSW comes back on line I'll try to remember to post a link to the discussion.

(in reply to bobi)
       Post #: 2

Synthetic in place of castor - 6/29/2002 7:01:26 AM   
downunder-RCU



Posts: 1125
Joined: 12/27/2001
From: Adelaide, South Australia
Status: offline 		Well how about that...they're back on line already so here's the link to the oil discussion..
http://www.clstunt.com/htdocs/dcforum/DCForumID1/2152.html

(in reply to bobi)
       Post #: 3

synthetics - 7/10/2002 8:47:05 AM   
noahb



Posts: 548
Joined: 1/19/2002
From: Carlsbad, NM, USA
Status: offline 		I have been running 15% coolpower (total synt.) for about 5 years now, lean runs and everything. All my engines run great and still have lots of compression. Keep in mind that these engines can actually get by on about 10% oil, but manufactures put in a safety factor so that no body ruins there engines. That carbon build up in engines, also retains heat...there is nothing wrong with castor...its biggest benifit know days is the rust protection...

(in reply to bobi)
       Post #: 4

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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> RC Fuels >> Synthetic in place of castor
Page: [1]





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