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earlwb's blog View Details
Archive for November, 2012
Posted by earlwb | 11-24-2012 @ 10:25 PM | 17,026 Views
I have had this World Super Stunts .60 plane for a couple of years or so, but never did anything with it. So I decided to use it. I put it together and used a Futaba FAAST radio system with all S.Bus servos as well. The CDI unit is powered by its own separate 2200mah LiFe battery pack and the radio uses the same type of LiFe battery pack too.

The engine is a NGH 17cc gasoline engine using a 14x8 propeller on it. it turns out that the engine worked really well and has ample power to fly the plane, albeit no 3D hovering by hanging off of the prop much though. But once the plane is airborne I can throttle back to about 2/3 throttle and the plane will do all the normal aerobatics quite well like that. 1/2 throttle or even 1/3 throttle is a good tooling around speed too.

The plane is pretty huge with a 80 inch wingspan. But it is built really light though, so overpowering it isn't a good idea, unless you go in and reinforce it a lot. It'll fly fine with a good .60 to .75 size engine on it too. I tried some different engines and none of my regular 1.20 or larger engines will fit in between the motor mount rails. So unless you change how you want to mount the engine on the firewall, the larger engines aren't going to fit. Also it doesn't have a fuel tank hatch so changing the blind nuts and where they mount would be a hassle too. So I decided to just use the NGH 17cc engine as it fits in the plane easily and is easy to hook up too. It isn't much different than running a glow engine on the plane.

I did put the elevator and rudder servos in the tail at the rear though. I like that method as it makes for a solid way to control the control surfaces. Since the plane is so long, using pushrods, etc for all of that length would tend to have problems with flexing, etc. I did use a second rudder servo for the nose gear though. it fit right in next to the throttle servo. I also didn't use all of the hardware that came with the plane, opting instead to substitute pushrods and clevises as needed.

The plane flew great. The engine had more power than I needed to fly the plane. But not so much as to be overpowering the plane though. I have been pretty impressed with the NGH 17cc engine. The Walbro carb on the engine has been the best carb of that type I have used so far. The carb came pretty much set good right out of the box, just a little rich on the main jet and that was it. But the transition and throttle response has been great, and no dead spot where as you advance the throttle and the engine would tend to lean out as it changes from the low speed to high speed jets.

Trying to land the plane without using the flaps is tricky as it has so much wing area in comparison to its weight, that it'll float and tends to not settle down under the ground effect when it gets close to the ground. So you either need to come in at a higher alpha angle mode for landing and or take advantage of the flaps to help slow it down too.

My plane came out weighing in at about 9 and 1/4 pounds so it isn't heavy. I even added 6 ounces of weight to the nose of the plane that I probably didn't need, but I was concerned as to where the instructions stated the CG was. So I added the weight to move it forward some more. One could build it more light using a glow engine and putting the servos where the instructions state too.