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HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › OS 55 approx. 10 flights - Rust?
10-17-2010 02:27 PM  8 years agoPost 41
rexxigpilot

rrProfessor

Florida

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Some of the fuel manufacturers like Magnum will provide you with a custom blend containing castor (you may need a minimum 8-10 case order to get them to do this). You can also use airplane, boat or car fuel with part castor and part synthetic lubricant (most contain 2% to 5% castor), or you can mix castor oil into your heli fuel.

We heli guys seem to hate cleaning our helis after use and select fuel with 100% synthetic lubricant as a result. The downside is we lose the engine protection provided by castor oil.

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10-17-2010 03:06 PM  8 years agoPost 42
Mputu

rrVeteran

Killeen, TX

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That's great info, thanks and I will look it up. If I can minimize engine maintenance, anything is worth a try.

Fly hard, Land safe

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10-17-2010 03:30 PM  8 years agoPost 43
KevinB

rrKey Veteran

Earth

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If I know my heli will sit for a month or more, I will just pop off the backplate, put in some after run oil. Take out the glowplug and slowly turn it over so all the internals get coated. Then throw the backplate back on. I always store my helis with the carb closed and the exhaust plugged.

ONE SAFETY TIP: If you are running YS motors, do NOT use WD40 or any other petroleum based oil as your after run. If you look around there are some after runs that are specifically made for YS engines. Using the wrong oil will attack the o-rings and the diaphram in the carb and your engine will no longer run properly.

KevinB

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10-17-2010 06:55 PM  8 years agoPost 44
GMPheli

rrElite Veteran

W. Bridgewater, MA USA

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I add 2 oz of Sig castor oil to each gallon. Seems to help. It does not gum up the motor at all, but it does make spots on the header and pipe. I throw my mufflers in the crockpot w/antifreeze from time to time.

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10-17-2010 09:27 PM  8 years agoPost 45
FLYINFOOL

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Cudahy, WI

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I still believe in Castor.
My hyper 50 bearings typically wear out at around 10 cases of fuel with no rust on the inside of the engine anywhere.
I run Magnum 30% heli with 1oz of Castor added to each gallon. I use a 2oz fueling syringe from the LHS for measuring it. I also get my Castor in quart bottles from the LHS.
I do not notice any difference in mess from the Castor except for some brown spots baked onto the muffler.
I did an experiment and stopped adding the Castor and I had bearing rust after just one case of fuel, So I have proved that for my conditions it does help.
I do NOT run my engines out of fuel at the end of the day or ever (on purpose). I do not use plugs in the carb or exhaust, I store on the skids, One big thing is that the helies are stored in my basement where I have a MONSTER dehumidifier that keeps the basement at less than 45% humidity, WHERE you store it has a huge effect on rust.

Castor oil has other benefits than just its ability to resist rust.

If you want to know the ability of your fuel to resist rust, put one drop on a piece of glass and come back in a month to see what is left, you will find that most if not all of the synthetic oil has evaporated.


Jeff Borowski
RAMS Club President
www.ramsrcclub.com

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10-18-2010 01:20 AM  8 years agoPost 46
KevinB

rrKey Veteran

Earth

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FLYINFOOL
Have you tried less castor ? ie: 1/2 oz / gallon ?? I'm wondering if there is a "magic" ratio that would keep away the rust AND not produce the spots.

KevinB

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10-25-2010 03:11 AM  8 years agoPost 47
Dino Spadaccini

rrElite Veteran

USA

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i am posting these pictures of my motor which is a Os hz pumped motor that i just pulled out of my main heli

i got this engine when they hit the market about 18 to 24 months ago, my point is to show you that its not the fuel as i run cool power i am showing a shot of the ring to show that it needs one, but more important the case shot.

no rust i do not use after run and i away fill my fuel tank on the heli after flying just what i do, i keep my heli in the basement where i keep my dehumidifier set at 45% that plays a big role in why motors rust.

nitro will pull moisture in causing what you are seeing its not from running the fuel, i have been using cool power for more then 15 yrs its how you store your heli or where you are storing it that is causing the rust on the back of the crank and on the face of the rear bearing just my opinion on the matter

RIP Roman JR
Capt USA Align Factory Team Align - Conquer Your heart
Team Futaba

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10-25-2010 05:27 AM  8 years agoPost 48
EagleMan!

rrApprentice

Sydney, Australia

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Hello Dino,

I agree with you.. It is not the Cool Power fuel.

From the picture, it looks as if there has been moisture inside the engine and then when the fuel gets in, it actually lifts up the oil above the moisture content and when this is burnt, it became the rusty picture...

I have had a similar problem before in Australia...

Anyway, those rusty thing can be cleaned off with rubbing alcohol no worries.

Cheers.

"If it doesn't work...TRY HARDER!!"

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11-03-2010 06:30 PM  8 years agoPost 49
Zaneman007

rrElite Veteran

Texas - USA

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I have to agree.

From the pics, it looks like there is moisture in the engine, still?

The thing looks wet. Oil will coat, but that looks like dropplets?

Nitro, regardless of the brand, will pull moisture from the air.

I crank my eninge over with the fuel line shut off, and the glow on after a day of flying. I recently purchased after run oil, for "wintering over".

Other than the crank and bearing, you can clean up the aluminum. Regardless wether it is from oxidatioin or fuel dye, it is just coated on there, nothing more. You can probably clean up the crank also.

The bearing is another issue.

Just my thoughts

Old Guys Rule!

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11-04-2010 09:14 PM  8 years agoPost 50
petmotel

rrKey Veteran

DeKalb, IL.

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Here is a suggestion from the KME online manual that makes good sense.

http://www.kmeengines.com/uploads/KME_.60_Manual.pdf

On page 13 "After Flight", they suggest disconnecting fuel line, opening throttle fully, and spinning with the starter for 5 seconds.

This will purge all of the exhaust contaminants, and fuel from the engine. I've been doing this since I read it, makes more sense than running the engine dry, as that still leaves residual exhaust in the engine and pipe.

I agree with the comments about fuel containing castor oil, my old airplane engines never once suffered from rusty bearings.

Jay

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11-04-2010 09:25 PM  8 years agoPost 51
reddragon

rrElite Veteran

Brooklyn, N.Y.

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What?
""yeah that's coolpower for you""
I've been running Cool Power for years and I've never come across anything like that.

Wayne - Fly it like you stole it! You're in good hands with Runryder!

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11-05-2010 12:10 AM  8 years agoPost 52
rexxigpilot

rrProfessor

Florida

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Nothing wrong with Coolpower! Heli storage in humid conditions and changing conditions will cause rust. Keep you helis in climate controlled environment at all times when not flying and you won't have much rust problem.

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HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › OS 55 approx. 10 flights - Rust?
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