Help! Not getting the power I want.

[christiaan123]

Hello all my Rc friends I managed to maiden my new sukoi 29 111cc sebart..it flys great 😊..just want to ask a question I am not getting the performance out of the engine that I want it's a brand new dle 111cc the engine has been perfectly tuned and has no problems. Could it be the reason why my engine is not given the best power it is suppose to give. When it goes verticals it climbs abit but not alot. Is it because the engine is still new and it still needs to be run in? Iv only had three flights with the new engine.My aeroplane is the weight of a normal 100cc. Thanks for the help😊

[db1331]

I was told my Da 150 needed about 7 or 8 gallons thru it before it would come to life and I found that to be true .

[wfield0455]

	Quote: Originally Posted by christiaan123
	Hello all my Rc friends I managed to maiden my new sukoi 29 111cc sebart..it flys great 😊..just want to ask a question I am not getting the performance out of the engine that I want it's a brand new dle 111cc the engine has been perfectly tuned and has no problems. Could it be the reason why my engine is not given the best power it is suppose to give. When it goes verticals it climbs abit but not alot. Is it because the engine is still new and it still needs to be run in? Iv only had three flights with the new engine.My aeroplane is the weight of a normal 100cc. Thanks for the help😊

While your engine will get stronger as it breaks in it won't get THAT much stronger. If your engine is properly tuned and you have very poor vertical then either you have a very poor prop choice, or the airframe is too heavy for the engine... Since you didn't give any real information such as airframe type, airframe weight, prop selection, RPM, etc, it's pretty difficult to give any useful information.

The bottom line is, all of my airframes when new, with a brand new engine had more than adequate performance and it got better from there as the engine broke in. If you consider that your performance is poor then unless you make some change such as prop selection, etc, simply breaking in the engine isn't going to solve the problem...

[christiaan123]

They say the plane full weight is 13kg and I'm running a 27-10 prop on it.

[wfield0455]

	Quote: Originally Posted by christiaan123
	They say the plane full weight is 13kg and I'm running a 27-10 prop on it.

13kg / 28lbs with a 27-10 prop should be fine. Something like a 28-10 may be better in the long run but the plane should perform pretty well with that engine and prop combination at that weight. If you have access to a tachometer it would be useful to know what RPM you're getting.

If you aren't able to climb out indefinitely at full throttle without slowing down then I suspect there is something wrong such as the throttle isn't opening fully or the engine is perhaps not as perfectly tuned as you believe.

By the way, to me, perfectly tuned means that the top end is fully leaned, and the low end adjusted for smooth transition and reliable idle. If you are running it rich because it's new, don't.

Also, not sure of the altitude for your flying field. If you are flying significantly above sea level that could make a big difference. Where I fly we are pretty close to sea level so that is what I'm basing my expectations on...

[christiaan123]

I used the tachometer yesterday and it showed around 8500 rpm I'm flying significantally above sea level..but in a months time I'm moving close to sea level..so it should be better then what I'll do is ill fly my engine with a 27:10 until its run in then I wil change it to a 28:10

[planebender]

You better get your Tach checked. Or you might have had your prop blade selector on (3 Blade) by mistake. No way that engine will come even close to 8500rpm with a 27X10 prop.

[wfield0455]

	Quote: Originally Posted by christiaan123
	I used the tachometer yesterday and it showed around 8500 rpm I'm flying significantally above sea level..but in a months time I'm moving close to sea level..so it should be better then what I'll do is ill fly my engine with a 27:10 until its run in then I wil change it to a 28:10

As Dave mentioned, I think you must have had your tach set for a 3 bladed prop as 8500 RPM sounds way too high. Between moving to a lower altitude flying site, finding the optimum propeller and getting your engine run in, you should be fine...

[kce]

I agree, 8500 rpm's is to high i have two DLE 111,s with Vess 27-10 props and i get about 6600 rpm and am happy with that. My yaks weighs about twenty seven and a half pounds and pulls up from a hover just fine. I found for 3D flying a wood prop is better at least for me.

[christiaan123]

Kce, do you think it's because my engine is not run in yet? Is your engine run in?

[GEJ]

Just been thinking, what tach are you using? The one that plugs into the ignition or an optical? Also, I have a DLE111 that was running a hobbyking carbon prop but never got much more than 6600.

[kce]

You will get a little more power as it breaks in but i would not expect much. Try the vess 27x10 prop, the prop does make a difference considering what kind of flying you do, i do 3D there fore i want it to pull out of a hover when i say to. The DLE 111 on a 27lb model should be pulling out nice but not like a rocket. If you want that you need a DA 120, pricey but you only live once. I have two of them also and the DA 120 comes out of the hole like an animal. My DLE's have been good for me also and are good engines for the price, i would buy another.

[N726AC]

Is the prop on backwards?

[parpar1]

	Quote: Originally Posted by N726AC
	Is the prop on backwards?

[christiaan123]

He guys a professor from the university told me that I should move my engine foward by 25 mm he says its because the sukoi has such a big round cowl the cowl takes most of the props space to give power..some of my mates who also fly yaks and sukoi also did this because the prop is too close to the cowl. I think that's my problem they say it will give my plane 30% more power and that's a huge difference.