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HomeAircraftHelicopterMain Discussion › Metallurgists?
10-25-2009 10:59 AM  8 years agoPost 21
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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A good squirt of some brake clean or carb cleaner would have done better for you cleaning , i've never used alcohol . I soak the eningine internals down with atf and have never had a problem like yours .
same here

Shawn
Team Leisure-Tech
Team HelixRC

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10-25-2009 02:23 PM  8 years agoPost 22
nitronoxious

rrNovice

Laguna Niguel, CA

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Corrosion X is the way to go
Corrosion X is about $20 for the big can but after two years of blasting it into the carb after a days flying not a lick of rust on that rear Hyper bearing. Great stuff, can be used in lieu of zinc oxide paint in full scale planes. Doesn't conduct electricity.

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10-25-2009 03:16 PM  8 years agoPost 23
billiano

rrVeteran

Greece ,Patras

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Very intresting all the above for us the rookies

Esprit Model Flight Team
Kasama Srimok 90N FBL
TDR Rigid 90

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10-25-2009 03:41 PM  8 years agoPost 24
nickt919

rrVeteran

New Orleans, Louisiana

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+1 here for the Marvel Mystery and ATF. My dad was an auto mechanic all his life and showed this to me long before I ever got into models. I just carried it over years ago to the model r/c cars, then plane engines, and now heli engines. I don't know if it's wrong or not but I've never had any problems that I know of from it's use. I apply it to the models with a little needle point applicator bottle I got from the r/c car days to oil everything on my helis. The needle point gets into the tightest spots and puts just enough without getting everything sloppy.

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10-25-2009 03:54 PM  8 years agoPost 25
Dr.Ben

rrMaster

Richmond, VA, USA

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Dont' use brake cleaner. I learned this the hard way. Brake cleaner evaporates EXTREMELY fast and leaves no residue. While it evaporates, it'll quick cool and condensate humidity onto the surface of parts (again, this is all about your local weather). Last season I had a spot of trash in the exhaust port of a new motor that I spotted just beforeI put the muffler on. I ran the piston up to top dead center and flushed the port out with one shot of brake cleaner. Enough of the stuff leaked by, got to the rear bearing, and rusted it in a matter of just a day or so.

If you use any non-petroleum product on any of the non silicone/metallic parts of an engine, please chase it with something with some kind of petroleum and/or corrosion protective product.

Nitro, out of curiosity, what is the average relative humidity where you live in CA? I know the Corrosion X is a good product, but if you're not seeing 70-90% relative humidity like we see here 3/4 of the year, then your conditions are favoring bearing longevity to begin with.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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10-25-2009 04:10 PM  8 years agoPost 26
GMPheli

rrElite Veteran

W. Bridgewater, MA USA

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It was Clarence Lee of RCM's Engine Clinic fame that recommended the 50/50 Marvel Mystery or Marvel Mystery Air Tool and ATF. He prefered the air tool oil as it has more anti corrosion additives but it is harder to find

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10-25-2009 10:09 PM  8 years agoPost 27
nitronoxious

rrNovice

Laguna Niguel, CA

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Corrosion X
The stuff works well. So far, two years of experience with it and it has yet to foul a glow plug before its time or allow any rust to form in the bearings. Others who live inland from me (where it is drier) have had corrosion issues with the stock bearings on just about all types of fuel blends. From my understanding nitro is very corrosive.

The can comes with a little straw that I heated to bend the tip. At the end of each flight I point that straw right into the carb and flip the motor over with the starter for about 2 seconds. It's a popular product in the maritime industry as well.

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10-25-2009 11:16 PM  8 years agoPost 28
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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Dont' use brake cleaner
as long as you lubricate right after, then its fine.

use brake cleaner to clean, then ATF to soak the parts with afterwards. works great.

Shawn
Team Leisure-Tech
Team HelixRC

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10-26-2009 12:05 AM  8 years agoPost 29
Rob43

rrKey Veteran

Midland, MI USA

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I am not a metallurgist...
However, my specialty is in equipment reliability. In manufacturing, we store some of our precision mechanical seals for large equipment using STP for several years at a time with out problems with elastomers. My concern for using alcohol as an engine cleaner is that I don't think it can displace moisture. It's a pretty mild solvent at that. Brake cleaner contains methylene chloride..one of the strongest solvents there are (also used for cutting Loctite if needed), but it too can attract moisture due to it's fast evaporation. It will clean parts like no tomorrow, however.

Doubt if this helps, but is my 2 cents.

Rob

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