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Gasser Model RC Helicopters > Just a tad off topic........
 
 
TONY DUNCAN
Heliman
Location: WASHINGTON D.C. (USA)

My Posts This: Topic  Forum		I'd like to confirm my own ideas about petroleum based vs. synthetic mix oils. I've been helping my brother set up his 1/5 scale car. I practice the 'Meador' principles for a little over a year now and they haven't failed me yet. I'm currently flying the JR Z230 at a 70:1 ratio and it seems stronger each time I light it off.

My brother is also impressed with the 'authority' in which the engine (Z23PUH)gets the bird airborne. I'd like to apply the 'Meador' principles to the car engine. It is called a 'Solo', and in appearance, looks alot like the RC230, with an internal cooling fan. My brother is afraid that the change to synthetic and using lesser quanity will cause over-heat conditions inside the body.

I think the opposite, if anything it should run cooler. Am I missing something?

Thank you for your opinions, TonyD.
07-23-2003 Over year old.
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Al Magaloff
rrMaster
Location: 12,199 Posts- Enough Time Wasted. See Ya!

My Posts This: Topic  Forum		I'm with you on this one Tony. A high quality oil such as Amsoil 100:1 , allows more gasoline, which means more power, better cooling, which lessens the oil requirement. With two stroke gas engines, more oil is not better.
07-23-2003 Over year old.
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DangerousDick
Veteran
Location: Cheshire, England

My Posts This: Topic  Forum		Hope you don't mind 'chirping in' here but I've been using a 40:1 mix in my fuel.

This week someone pointed out to me that the Amsoil 100:1 oil I'm using should be 100:1 (duh ) so I'm putting more than double mix into my fuel.

Am I going to continue - NO, I've already diluted my current stock to 80:1 and all new stuff will be mixed at 100:1.

Just curious - so what I understand is that I'll get more power? Have I damaged anything doing what I've been doing up till now?

Cheers
Richard.
07-23-2003 Over year old.
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SkyKing
Senior Heliman
Location: Belvidere, Ill

My Posts This: Topic  Forum		Dangerous Dick
Do a search for posts by Billme here. He has the answers and is the final word on gassers. I think 100 to 1 is too low a oil mixture. I talked with Bill and after the conversation I set up 60 to 1 with the Amsoil 100:1 (as Bill recommends) oil and the bird ran GREAT!
Terry
07-23-2003 Over year old.
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ImRich
Veteran
Location: Derry, NH USA

My Posts This: Topic  Forum		Hi Richard,

I'm using 100:1 amsoil, but only went to 80:1 mixture. Even Amsoil says to use from 50:1 to 80:1 for extreme duty applications.

I'm not saying that you can't use 100:1 with the Amsoil, but I think most of us are being a bit more conservative with it. I think most people are using either a 64:1 or a 80:1 mix.

Let's hear from others.

I was using other oils at 32:1 or 40:1 for a long time. I had noticed what looked like piston scuffing through the exhaust port a long time ago. Since the intake port side of the piston looked perfect, I had though I was just seeing some exhaust carbon on the piston, and I didn't think it was really anything serious since the engine still ran so well.

When I broke my engine mount last week, I took the engine apart to have it repaired. I found that I had some serious piston scuffing and not just some carbon streaks as I had originally thought.

My point to all of this is that This year I switched to Amsoil at 80:1. The rest of the engine looked perfect! I know this scuffing occured using other brands of oil at either 32:1 or 40:1 because this is what I was using in the past. So I trust the Amsoil 80:1 blend.

Oh, I did get my engine crankcase TIG welded. The welder said it was a high quality casting and easy to work with! I will be installing two new piston rings to bring the engine back up to it's full potential. It was running without problems before, but for the cost of two new rings I thought I'd rebuild it properly.

Because I wasn't sure if I could get the engine mount repaired, I ordered a new G231PUH.

I'll keep the older one as a spare, or sell it. It also can be used in a plank if someone buys a prop hub for it. It sure was running nice when I took it out of my X-Cell.

Tony, I can't say I noticed a lot more power but I know I didn't notice any less!! I'm using the 100:1 amsoil but mixing it at 80:1 The engine was running a lot smoother than the 40:1 I was running in the past.

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Rich
07-23-2003 Over year old.
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TONY DUNCAN
Heliman
Location: WASHINGTON D.C. (USA)

My Posts This: Topic  Forum		Thank You to all replies so far.......

I appreciate all the replies to this point. It confirms everything I have learned 'til now. I only hope it will convince him to at least try this method. I like Amsoil 100:1. Mind you, I am not condeming the other brands available on the market, this is what I have tried and IT WORKS!!! I still am occaisionally altering the mix, but at 70:1 ratio it is still very clean sounding(with no wet gurggle at low power settings) and strong lifting with 700mm blades. Now if I could just keep it smooth and level on forward flight w/o the dolphin moves I could declare an accomplishment before the season ends ;-)=

Thank to you all.
07-23-2003 Over year old.
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ImRich
Veteran
Location: Derry, NH USA

My Posts This: Topic  Forum		Tony,

As to your smooth flying...

I use some exponential (-50% right now) on my Gas X-Cell with the white 3D paddles. When I was using the older small square paddles -20% was enough exponential. Oh, these are Futaba numbers, I think JR uses positive exponential to reduce sensitivity near center stick.

I was surprised at how much negative exponential i needed with the 3D paddles.

I'm using the MinAir suggested cyclic maximums for pitch and roll.

What paddles are you using? Are you sure you have only the presribed pitch and roll cyclic max throws at maximum stick? Do you have any exponential dialed into your radio?

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Rich
07-23-2003 Over year old.
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Al Magaloff
rrMaster
Location: 12,199 Posts- Enough Time Wasted. See Ya!

My Posts This: Topic  Forum		Richard, I would not run at 100:1. The 80:1 mix is a good compromize. 64:1 for the first gallon or so on a new motor, then graduate to 80:1. I doubt very much you "hurt" anything by running a rich oil mix. You will notice at 80:1, how clean the engine runs, as Tony has described.
07-23-2003 Over year old.
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Gasser Model RC Helicopters > Just a tad off topic........
 
 
DangerousDick
Veteran
Location: Cheshire, England

My Posts This: Topic  Forum		OK then, I've taken a look at the back of the bottle and notice of what you lot are saying.

I'll go to the 80:1 mix in future.

Thanks for all the input.

Cheers
Richard.
07-23-2003 Over year old.
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Gasser Model RC Helicopters > Just a tad off topic........
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