How can I figure out how much HP my Evolution .46 NT can produce?

Mount it on a horse and see if it will pull it.

If it does, hitch two horses together. Etc. etc. etc.

(Sorry... Couldn't resist)

First you need a set of dice....

HP numbers are, in general, rather useless. Peak HP almost never coresponds to best performace in the air anyway. So select your prop based on flight testing, not HP calculations.

I was just curious more than any thing. The guys at work have been asking me how much power it has. I dont have a clue. I just tell them its loud,lol.


Thanks,


Wings

it's like 1.8 hp @ 18k rpm
but you'd be pushing a 8x6 prop or something ridiculously small

Oh, I see, it's the old "Let's impress the guys at work" thing!

Well, as they say, "If you can't Dazzle them with Details, Baffle them with B.S"

Just tell them that the engine will turn at 11.000 RPM with an 11x7 prop.

That means that for every revolution, it moves 7 inches of air.

So at 11,000 RPM It moves 77000 inches (or 6416.6 Feet) of air per minute.

Which, depending on the plane, equates to about 72 MPH (Faster in a dive)

I am having some difficulty with my new evo engine. It says it comes pre set. However, the low speed adjustment can easily be knocked around by pumping it on something. I think thats what I did.

Heres's the problem. When running wide open sometimes it slowly dies. I adjust the low speed needle and something else will happen, like it will die right off, or it will studer and act likeits going to die until I bring it back to idle. Some times it runs perfect wide open for for 10 15 seconds, then I slam it to idle, back up, down and it don't hesitate, then all the suden at full throttle again, it will studder and die.

The directions arent that clean. It says if the engine studders, smokes, then dies when giving throttle quickly its too rich. Then is say if the engine dies when giving throttle quickly, its too lean. Well, thats a fine line. Its hard for me to tell the two scenerios apart. It seems it smokes just a tad sometimes. Anyway, I'm trying to adjust it and I am not sure of a way to determine which way to go to get it right. I would hate to have to dead stick land on my first flight. I would probably dead stick it right into something I shouldn't.

Is there any place on the net, or do you have any suggestions and a quick way to determine which way to go, lean or rich. I assume the problem is in the low speed becaues it was factory set and the high speed looks pretty secure, as in I can mess it up by "bumping" it.

Thanks,

Wings

If the engine slowly dies when running wide open, then the problem is that your high speed needle is set too lean. Fix the high speed needle first, then re-check the low speed. The low speed screw doesn't have much effect at full throttle.

One of the easiest ways to tell is to let the engine idle, then give the fuel line a good pinch and release. If the RPMs go up, you're rich or ok, if they immediatly go down, you're too lean.

Wings, just for jollies, try this:

Disconnect the collar that is on the low-end needle. With a small screwdriver, close the low end screw completely, then, reopen it 1 and 1/5th turns. Now, set the collar to the mid adjustment point, and reconnect it.

From the factory, that low-end needle is supposed to be set to 1 1/5th turns open. But the one that I had for a review was set wrong from the factory. Once I set it correctly, it ran like a dream.