Norvel Engine Query

[millhouse_5]

The winter over here is ending rather abruptly with lots of rain and its soon going to become flying season again for me (Highly unusual weather). Over the winter I have made a small corsair which I am powering with a Norvel "Big Mig R/C" 0.061 swinging a 6x3 prop.
Needles to say, I was tired of sitting there and staring at a finished plane so I modeled the plane on realflight right down to the specs of the engine. I was baffled. The plane took off and went into an 80mph crusing speed!? I toned the engine down to about 70% power and the thing still would climb vertical.

I was wondering if anyone else here had a Norvel engine and if it performed so amazing. (I know I shouldnt be taking specs off of a computer program thats not 100% correct but even when its power is deminished that far it still shouldnt perform like that.)
If you want any specs on the plane or the engine just ask me and I should me able to tell you or provide a link that would leed you to some info.

Norvel 0.061
HS-81 servos
2oz fuel tank
19oz total weight
190" wing area
36" wign span
And for all you EP people out there it accepts a 480 or an AP 29 on 8 cells

[meltr]

Yes I had 2 of those Norvel engines and logged many hours on them. They were the model from before the Big Mig and both in that capacity. One was the heli version for the LMH100+ and one aero version.

They are quite powerful engines, if you set it up to it's optimum performance it could well pull that plane vertical. 80mph is probablly a bit optimistic though for a x3 inch prop. However, you do really have get your engine running fairly well to do that i.e. right fuel, tuning cooling, tank etc. It won't take a lot of mis-setting up to not achieve that.

The best fuel I found for it is Model Technics QuickFire. The 16% nitro one is good. The fuel is actually designed for model car engines. The Norvel runs very sweet on it.

Mel.

[millhouse_5]

I had confiadance that the engine would be good.
Ive tried to break it in before the weather got cold and the thing would not go through a full 2oz tank without stalling multipul times.
How long did it take you to berak in your engine?

[meltr]

They run very reliable. I can't ever remember mine quitting. However, for good results you should use minimum 15% nitro, preferablly that QuikFire or Cox fuel. I started with Duraglo 5 and it doesn't run nearly as smooth. In fact with Duraglo 5 occasionally it would require a few flicks just to get it started. Duraglow
10 is better but really you should bite the bullet and run the right fuel. Make sure it is not overheating from a too lean run or too little nitro or too cool from being too rich.

I'm no expert on the next bit but if you're using GX-5 or some full castor fuel that you'd normally use in a plane just forget it. I'm sure after saying this we'll get a load of posts saying they're running full castor in norvell quite hapilly

Also, the other view I have, which may not be shared by all (certainly the control line guys) is that sitting the engine on the bench running it like that is not good for the engine. The best place to run it in is in the air. The people that do bench run are probablly very knowledgable to select the right prop and run with exactly the right sequence of mixture settings and check the tempreature of the engine and run time so as not to hurt it.

Mel.

[millhouse_5]

I bought some Omega 25% recently because I couldnt get the thing to keep runing smothly on the 15% (good thing I only have a 2oz tank because that stuff was expensive!) The manual says that you should not put any more then 35% in it so I should be fine with the 25%.
did you say that you were using a starter stick to get your engine going? Ive tried to flick the engine over but it wouldnt go without a struggle. The electric starter I have sill start it easily but I dont have a battery for it so I have to use a car battery which is a little inconvenientis there any sugestions that you have for making it run a little better. would ajusting the carb help in allowing the engine to perform better?

[meltr]

Not heard of Omega fuel so I don't know what it's like.

I never use a starter (chicken) stick because I am bad at it. I usually flip the spinner backwards, but on those little engines I flip the prop forward because they like quite a sharp fast flick to get them going.

QuikFire fuel has a starting additive designed for pull start cars. Pull starts don't really have as much power or speed as a good flick can give so it's good for this engine.

When I start that engine I make sure it's very juicy, even to the extent I can see fuel coming through the filter, but it mustn't be too wet below the crank or it will be just too rich to run and the model has to be slightly nose down. Correct mixture adjustment is very important to the starting of any engine. In the old days people would warm those engines if they have trouble starting in the cold.

Check the glow is bright. Some of those glow head plugs are 2 volts. I used to use 2 volt ones with a 2v sealed lead acid battery.

It's just one of those things. Each (make/model of) engine likes a particular starting technique and it will respond better once you get to know it better.

Mel.

[Richard]

Quote:Originally posted by meltr

... will respond better once you get to know it better.

The same advice could be said for women. I haven€™t noticed an improvement! s]

Ok, it was a bad one... but I couldnt resist

[millhouse_5]

theres just too many differences to count between the products that are available in Canada and the UK. Omega is prety much the dominant fuel in Canada.
Im having a small bit of trouble when I do try and start my engine though. I cant seem to get any fuel into the carb. it will go in if I use an electric starter but other then that it just wont go.
Would a fuel line that is too large present a problem in getting the fuel to the engine. if it does, could it also be the cause of the problem of my engine stalling without much reason?

[klondike17]

I know that many of new own Norvel engines, but there was no support for them until now. Norvel is back in production, but the brand is called NV now. I am a factory rep and if you need parts or engines, please contact me at klondike17 AT juno.com