Substitute for Castor that widely available (Full Version)

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whiskey29 -> Substitute for Castor that widely available (6/5/2006 1:48:17 PM)

Methanol and castor is easy to find in my country.
But I want to run my engine on Synthetic, I hate the gum in castor.
But there is no Synthetic OIL that made special for R/C available here.

Is there any other OIL probably any brand that can be used and mix well with Methanol ?
Probably something for motorcycle or other common engine ?

Thanks



hpi apollo -> RE: Substitute for Castor that widely available (6/5/2006 5:26:59 PM)

Klotz KL-200 Techniplate all synthetic, if you have had alot of gumming up problems, then you prolly havent used a good quality castor oil



Sport_Pilot -> RE: Substitute for Castor that widely available (6/5/2006 6:16:37 PM)

People confuse gum with the varnish left after oil sits up. The gum in castor is greenish and is residue from the seed hulls.



hpi apollo -> RE: Substitute for Castor that widely available (6/5/2006 11:22:38 PM)

the varnish is really a bad thing either, ask fuelman, he has told me that its a protective layer that coats the parts, so if you ahve a lean run, its a bit more forgiving



downunder -> RE: Substitute for Castor that widely available (6/6/2006 6:01:44 AM)

All castor is degummed during the manufacturing process so it's impossible to get ungummed castor. The green colour actually comes from any brass that's been in contact with castor for a long time...years usually. I've found it on brass fuel tubing in very old tanks. Over very long periods, like in an engine that's been stored, the castor slowly oxidises and gets thicker until it's almost solid but it's then a very good preservative. As Sport_Pilot said, the brown on the sides of pistons isn't gum, it's a lubricant. Castor is the only oil (animal, vegetable, mineral or synthetic) that has this property and it continually forms different lubricants up to about 850F when it calls it quits and decides to burn. Synthetics last until about 450F then flash into vapour when they fall to pieces and then burn.

If you can't find the usual synthetics like Klotz then look around for jet turbine oils. Not all will mix with methanol though.



whiskey29 -> RE: Substitute for Castor that widely available (6/6/2006 3:49:18 PM)

Thanks, What I meant was the brown residue left if you store the engine and makes everything sticky. Although easy to clean, it's better if I have to forget cleaning at all.
I use regular nitroed fuel for aerobatic flying. The self-mixed fuel is for trainer, for new people in the hobby, since getting premixed fuel for R/C is quite expensive here.
The cost of self mixed fuel is about 1/3 to 1/4 of fuel with nitro.
The castor that I bought from chemical store is qualified to use for medicine.

Yep green color is the brass mixed with castor after a while, or if it sits too long.

Jet fuel oil ? Hmmm that would be harder to find...

Any other idea may be ?

THanks




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