Aeroworks Edge .91FX

[katman]

Just finished breaking in an O.S. .91FX on the front of Aeroworks 60 inch Edge. Running a Master Airscrew 15x6 K series. Didn't check the rpms but there is no lack of power to say the least. Loops can go as high as your eyes can see and that big prop makes tumbles very violent.

[teryn]

this is a fun airplane. Ended up putting a 120 4-stroke on mine.

[katman]

	Quote: Originally Posted by teryn
	this is a fun airplane. Ended up putting a 120 4-stroke on mine.

What did you have on it before that, or was that the first motor? Did it have enough power? I am not really a fan of four strokes but curious anyway. This plane originally had a GMS .76 on it when I bought it which may have had enough power if it would have stayed running.

[teryn]

I had a 91 on it for the early flights and a 120 later. go to the Aeroworks website and then to the page about this plane. You will see my video on there; the hovering shots were done with a 120 and everything else with a 91 4-stroke.

	Quote: Originally Posted by katman
	What did you have on it before that, or was that the first motor? Did it have enough power? I am not really a fan of four strokes but curious anyway. This plane originally had a GMS .76 on it when I bought it which may have had enough power if it would have stayed running.

[heligrom]

teryn,

how was the plane with a 91 4 stroke? im thinking about putting a 91 i have lying around in that airframe and i am curious as to what it will be capable of.

[katman]

	Quote: Originally Posted by heligrom
	teryn, how was the plane with a 91 4 stroke? im thinking about putting a 91 i have lying around in that airframe and i am curious as to what it will be capable of.

Check out the videos on aeroworks site if you want to see what a 91 4-stroke will do.

Click the play button to start. Right click here to save the video " title="You Tube" target="_blank">You Tube

://www.aero-works.net/store/images/upload/video/46_60_edge540t.wmv I personally wouldn't put it on there unless it was just laying around, but then, I don't have any 4-strokes laying around cause I don't like them.

[danielc1536]

I have the new OS .75 AX on my Aeroworks Edge and flew it yesterday for its maiden flight. It is definately fast. It does not lack for power and goes vertical really well. I flew it with a TopFlite Power Point 14x6 and 14x8 and it is fast on approach for landing. I was wandering what a good prop would be to slow it down just a little? Do I need to go to a 15 size? Recommended props are 14x6, 14x8, and 15x7. Also I noticed alot of times on landing that it wants to tip up on its nose and pop the prop on the ground, granted when i got past the paved runway and hit the taller grass at the end it would do it, but it seems to tip up a little easier than i like. Do I need to add a little weight to the tail end?

Overall this is an awesome plane and love it. It flies really well and handles great, just a couple adjustments I would like to make to it.

Any info would be greatly appreciated.

Daniel

[flyinhi]

Can anybody tell me why the engine listed in the video is a Magnum 91 4-s but the engine in the plane that is shown in the air is either a YS or maybe a Saito? You can see two (2) valve covers in one of the shots. Magnum's only have one (1) valve cover.

[katman]

	Quote: Originally Posted by danielc1536
	I have the new OS .75 AX on my Aeroworks Edge and flew it yesterday for its maiden flight. It is definately fast. It does not lack for power and goes vertical really well. I flew it with a TopFlite Power Point 14x6 and 14x8 and it is fast on approach for landing. I was wandering what a good prop would be to slow it down just a little? Do I need to go to a 15 size? Recommended props are 14x6, 14x8, and 15x7. Also I noticed alot of times on landing that it wants to tip up on its nose and pop the prop on the ground, granted when i got past the paved runway and hit the taller grass at the end it would do it, but it seems to tip up a little easier than i like. Do I need to add a little weight to the tail end? Overall this is an awesome plane and love it. It flies really well and handles great, just a couple adjustments I would like to make to it. Any info would be greatly appreciated. Daniel

There kinda tall. Don't know what other planes you have but if your used to shorter planes this one has tall gear and it may be a little nose heavy. My bro in law has the 91FX on his and he chucked a whole stick of lead in the tail and that improved the flying drastically. The 91FX is actually lighter than you 75ax. The 75 is 26.46 ounces with the stock muffler and the 91 is 24.3 ounces with the stock muffler.

It truly is a nice plane. Very well built. There has been two of them around where I fly. The last one has over 10 hours of actual flying time on it since last December. Yesterday it broke in half due to a dead stick while hovering. The muffler previously had come apart in flight and we lost the baffle so were running it without the baffle. Seems like it gets lean in a hover then and dies. By the evening time it was ready to fly again with very little added weight.

The fast approach will most likely be cured if you move the CG back. Were using a 15x6 on the 91 and it will creeeeeep in if you want to. Just beware of a tip stall while coming in slow.

[katman]

	Quote: Originally Posted by flyinhi
	Can anybody tell me why the engine listed in the video is a Magnum 91 4-s but the engine in the plane that is shown in the air is either a YS or maybe a Saito? You can see two (2) valve covers in one of the shots. Magnum's only have one (1) valve cover.

This comes from the 4th post on this thread:

quote (I had a 91 on it for the early flights and a 120 later. go to the Aeroworks website and then to the page about this plane. You will see my video on there; the hovering shots were done with a 120 and everything else with a 91 4-stroke.)

I think that is the joys of testing new planes. You land up with a number of different planes and engine combos all "in the interest of testing"

[danielc1536]

.

[danielc1536]

	Quote: Originally Posted by katman
	There kinda tall. Don't know what other planes you have but if your used to shorter planes this one has tall gear and it may be a little nose heavy. My bro in law has the 91FX on his and he chucked a whole stick of lead in the tail and that improved the flying drastically. The 91FX is actually lighter than you 75ax. The 75 is 26.46 ounces with the stock muffler and the 91 is 24.3 ounces with the stock muffler. It truly is a nice plane. Very well built. There has been two of them around where I fly. The last one has over 10 hours of actual flying time on it since last December. Yesterday it broke in half due to a dead stick while hovering. The muffler previously had come apart in flight and we lost the baffle so were running it without the baffle. Seems like it gets lean in a hover then and dies. By the evening time it was ready to fly again with very little added weight. The fast approach will most likely be cured if you move the CG back. Were using a 15x6 on the 91 and it will creeeeeep in if you want to. Just beware of a tip stall while coming in slow.

What brand of 15x6 prop are they using? I have the Top Flite Power point on it now in 14x6. My buddy told me to try a little wider prop also. I can run up to a 15x7 on the 75ax. How much weight do you think he added, I thought about adding some to the tail also.

[katman]

Were using a 15x6 K series Master Airscrew. But thats on a .91 FX, I understand your using a .74AX, not sure what prop would be good for that as I have never owned one. The weight we put in the back was one strip of these http://images.google.com/imgres?imgurl=http://www.hobbylinc.com/gr/pin/pinp378.jpg&imgrefurl=http://www.hobbylinc.com/htm/pin/pinp378.htm&usg=__fkisUijf3CpjgQLKrXezw44AnsU=&h=4 67&w=250&sz=24&hl=en&start=2&sig2=kcEwUjmkm67vG9oA 7liGbg&um=1&tbnid=NQDf3x5DN6DCPM:&tbnh=128&tbnw=69 &prev=/images%3Fq%3Dpinewood%2Bderby%2Bweights%26hl%3Den% 26sa%3DN%26um%3D1&ei=vif3SZeCNpTIswPMhJGXDw

So I think that would be about 14 ounces.

[Kiva Flyer]

Just to muddy the waters, my 91FX was much happier with a smaller prop. I read the FAQ at this link: http://www.osengines.com/faq/faq-osmg0591.html and decided to try a smaller prop ( I was running a 15x7). I began using a 13X8 and 14X6. Mucho better. If you're happy, though, no problem; it's a great engine.

[katman]

	Quote: Originally Posted by Kiva Flyer
	Just to muddy the waters, my 91FX was much happier with a smaller prop. I read the FAQ at this link: http://www.osengines.com/faq/faq-osmg0591.html and decided to try a smaller prop ( I was running a 15x7). I began using a 13X8 and 14X6. Mucho better. If you're happy, though, no problem; it's a great engine.

Yes, like you said, whatever makes you happy. I think that article is just OS covering themselves. They aren't going to advise you to run a prop on either limit of the engines capabilities. What do you like better about how the smaller prop runs? We do a lot of 3D with this engine on a 7 pound plane and the 15x6 gives us more than enough forward speed and tremendous pull out. I detest 4-stroke engines, for no good reason, I just don't like them ( I don't want to hear anything about it). But it tickles me to be able to run a "4-stroke" prop on this cheap light 2-stroke without any problems. We pulled the motor apart the other day after over 10 hours of running and it looked absolutely brand new inside. I wouldn't advise going any more pitch on a 15" prop. If your looking for speed or are flying an airframe that is more draggy the 15x6 may not get you the top speed your looking for so you would have to go up in pitch and down in diameter. OS makes a fine engine.