I have had a problem with rust on my crank of my os rg.When i was at the lhs awhile back they told me to stop using trinity and use odonnell .they said that some manufactures do not take all the salts out of the synthetic oils.Is this true or are they selling me? Also the odonnel runs cooler than the trinity.
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militarymaxx
RCTalk Addict
I personally use Dynamite Blue Thunder Race Blend but have heard good things about O'Donnel. I haven't heard anything about salts in the oils that manufacturers use. Usually, when someone talks about rust on the crank it's because moisture was present in the crankcase for a period of time. How old is the engine and what's your after-run maintenance like ? What's the longest that it has sit between runs ?
El Pirata
RCTalk VIP
The rust on your crank is probably a result of your after-run oil or lack thereof. Nitromethane has a tendency to absorb water which is why you need to make sure your fuel bottle is sealed before storage otherwise the nitromethane % can decrease and the water content can increase. Even notice the water that appears out of nowhere in your fuel tank on your rc when you leave fuel in the tank overnight? The same thing is happening to your engine when you do not use after run oil.
As far as the salt content being higher than the others, let me check with Sky on that one. I'm sure he has a gas chromatigraph laying around somewhere, they only run about $5000. Honestly I don't think the person you are talking to is trying to mislead you as much as they are misinformed.
I honestly can say that any rust internally on my engines is nothing to do with the salt content but more from operator head-space and timing error.
As far as the salt content being higher than the others, let me check with Sky on that one. I'm sure he has a gas chromatigraph laying around somewhere, they only run about $5000. Honestly I don't think the person you are talking to is trying to mislead you as much as they are misinformed.
I honestly can say that any rust internally on my engines is nothing to do with the salt content but more from operator head-space and timing error.
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I use after run oil almost every time & I said almost .The engine.is not that old it has ½ gallon in it. Not alot of use but when it set for long a period of time i did use after run oil(hobbico).
EL what do you mean by this??
honestly can say that any rust internally on my engines is nothing to do with the salt content but more from operator head-space and timing error
EL what do you mean by this??
honestly can say that any rust internally on my engines is nothing to do with the salt content but more from operator head-space and timing error
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El Pirata
RCTalk VIP
Forgetting to use after run oil through my engines from time to time is what I meant.
The "operator head-space and timing" is a phrase coming from the Army when it comes to preparing a .50 cal Ma Duece for firing. You have to check the head space (the spacing in the breech) and the timing (make sure the firing pin will fire a round). They have a special tool you use and get issued with every .50 cal to check this.
The term is used sometimes, like this time, to mean you or someone had not thought the matter through or really screwed up. Somewhere along tose lines. In the case where I had just used it in the previous post was meant to say I was being a moron and forgot to add after run oil from time to time and the internals were rusting as a result.
The "operator head-space and timing" is a phrase coming from the Army when it comes to preparing a .50 cal Ma Duece for firing. You have to check the head space (the spacing in the breech) and the timing (make sure the firing pin will fire a round). They have a special tool you use and get issued with every .50 cal to check this.
The term is used sometimes, like this time, to mean you or someone had not thought the matter through or really screwed up. Somewhere along tose lines. In the case where I had just used it in the previous post was meant to say I was being a moron and forgot to add after run oil from time to time and the internals were rusting as a result.
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