NITRO FUEL QUESTION

[SMASH]

I was under the impression that after running a niro engine you're supposed to use some "after-run"oil in them.Now I'm completely new to nitro's .....just waiting for a couple more pieces to show up in the mail then I'm off to build a new Raptor 30v2 kit.Mt question is ,while I was at my LHS the other day I was going to buy some "COOLPOWER 15%" fuel and I noticed that the container stated that there was no need to add after-run oil to the engine because the"coolpower" had suffient lubricants in it . Is this correct,I don't want to screw up a brand new engine due to a "CLAIM"
Suggestions/Opinions??????????

[WayneBrown]

I'll agree with their claim.
I've NEVER used after run oil, and in over 30 years of modelling I doubt would've saved one second worth of life in any engine I've owned.

[LAMAR COOLEY]

I agree, The only time I consider useing after-run oil is when I plan to store an engine for
any length of time, 2-3 months or more. Darn, I need more aircraft !!
Regards

[Rex-flyer]

I use cool power too and never use after run oil unless like stated before its gonna sit for a few months. If your like most of us, the birds not gonna sit long enough to get rust or whatever in the cylinder, my raptor is usually in the air everyday or at least every other.

[archiebald]

Lucky you!!,
I only fly at weekends, and if I have a business trip coming up, or if the rainy season is coming I always use ARO. Only time I don't is if I am very confident I am going to be flying the heli the following weekend.

Never used Coolpower, not available here.

But - I would say their claim is nonsense. The lubricants have nothing to do with preventing engine corrosion. Nothing will stop the methanol that is inside the engine at shutdown from absorbing moisture if the engine is stored in a humid place with the carb and muffler ports open.

I always make sure my throttle is full closed (not idle position) and use a muffler plug (also stops leaking oil in the car)

[sammy64]

Not sure if anyone one else does this but when i;m done flying and after i draned the tanks, i start mine and let it run to burn out the fuel that is left in the fliter and Carb. I use CP 30%. i do this step every time i pack up to head home even knowing that i will be flying the next day.

[vandelescrow]

Sammy64,

I used to do this when I had a perry pump in the fuel system. The directions state not let any fuel in the pump during storage or it will get damaged.

I used to fly the heli till it runs out of fuel then auto it, but was warned not to do this because the engine is going lean and can over heat. For the amount of time it is lean when running out of fuel, I don't know if it is a concern. But, On my R90, the engine died and the result was stripped gears in the tail housing. I was told by a reliable souce this was caused by the inertia of the tail blades. I think TT needs to make the gears out of better material.

[sammy64]

yes i could see that doing the auto out of fuel could cause some damage. I just let mine run out while i hold the head. i believe the sleve of the cylnder is Nickel plated and it wont rust and that the bearings are the issue with rust over time, so just to be on the safe side i just let her run. only a matter of a few Seconds before she's out.

[JimLerch]

I've always questioned the procedure of running the engine out of fuel on the last flight (either by letting it run the tank empty, pumping the tank empty and running the motor, or pinching a fuel line).

In any event, letting the motor run till it is out of fuel, also runs the motor till it is out of oil. Then some people let it sit like that for days or weeks.. Just doesn't seem right to me..


I'm thinking you'd crank it at WOT (no glow plug power) to get everything good and juicy, then pack the bird away... Or when your done flying, just put the heli away. I'm not to certain on the "pump the fuel out of the tank idea" either.....

Also, it could be my massive laziness showing thru, so your mileage may vary ! :)

[MarkD]

I run Coolpower 10%. Both of my nitros (OS32 and OS61) sat on the shelf for two years without draining or afterrun oil. Both engines started first time after that period and taking the back plates off showed no signs of rust or corrosion.

[Lota Fun R]

I use cool power and have a pumped 91 SX that I don't do anything but pump the fuel out of the tank. It's got many flights on it and is running strong.

I have run it dry and removed all fuel (a couple times) and then other times not, for 7 weeks and it fired right up.

They say no after run oil with cool power, and their claim seems to be true based on how many have had success using cool power.

I use %30. :YeaBaby:

[Raptorman37]

i do it anyways, i fly once a week, sometimes every two weeks.
It isn't hurting anything to do it, and i'd rather have my piece of mind instead of a rusty unreliable engine.