Build Log: Converting a 31" Super Cub to .049 Power (revisited)

Know what it needs now?

A couple "COX powered" stickers on the wing.

microflitedude wrote:Know what it needs now?

A couple "COX powered" stickers on the wing.

Maybe some enlarged ones.

Testing the controls ~

Me and my family went up to the schoolyard to fly and play around this afternoon. Brought the Cub along, and got to fly it. It flies great pretty much like I envisioned, which is great. The football field is a little small. It took three flights to trim it out. It flies fast, only went to full throttle once - shoots straight up with incredible velocity. It will throttle low enough to land, and it can land and take off from the short grass field. Unfortunately it did not run smooth in the air - maybe a pickup tube problem. The tachometer registered 14K, but then low throttle was 600, so we didn't take it seriously.

But man, does it slobber! Took a good wiping down with paper towels and alcohol to clean it. I think I will need to coat some more around the engine area with epoxy.

I have the video on DV mini tape, I will try to get it on Youtube as soon as possible. It's really long and is mostly rubbish.

I love Windows Live Movie Maker. I followed the tutorials below and had good movies the first time. And it's free if you use Windows. You probably need at least Windows 7 and 3 gigs of memory to get results.

Part 1: https://www.youtube.com/watch?v=J0wNLCy4SPI

Part 2: https://www.youtube.com/watch?v=6Ey_jN5ISMg

RknRusty wrote:I love Windows Live Movie Maker. I followed the tutorials below and had good movies the first time. And it's free if you use Windows. You probably need at least Windows 7 and 3 gigs of memory to get results.

Part 1: https://www.youtube.com/watch?v=J0wNLCy4SPI

Part 2: https://www.youtube.com/watch?v=6Ey_jN5ISMg

Thanks Mr. Rusty. I think my brother's computer has that.

microflitedude wrote:Me and my family went up to the schoolyard to fly and play around this afternoon. Brought the Cub along, and got to fly it. It flies great pretty much like I envisioned, which is great. The football field is a little small. It took three flights to trim it out. It flies fast, only went to full throttle once - shoots straight up with incredible velocity. It will throttle low enough to land, and it can land and take off from the short grass field. Unfortunately it did not run smooth in the air - maybe a pickup tube problem. The tachometer registered 14K, but then low throttle was 600, so we didn't take it seriously.

But man, does it slobber! Took a good wiping down with paper towels and alcohol to clean it. I think I will need to coat some more around the engine area with epoxy.

I have the video on DV mini tape, I will try to get it on Youtube as soon as possible. It's really long and is mostly rubbish.

Congratulations on getting it to fly.
did it have sufficient power to hover ?

nitroairplane wrote:

microflitedude wrote:Me and my family went up to the schoolyard to fly and play around this afternoon. Brought the Cub along, and got to fly it. It flies great pretty much like I envisioned, which is great. The football field is a little small. It took three flights to trim it out. It flies fast, only went to full throttle once - shoots straight up with incredible velocity. It will throttle low enough to land, and it can land and take off from the short grass field. Unfortunately it did not run smooth in the air - maybe a pickup tube problem. The tachometer registered 14K, but then low throttle was 600, so we didn't take it seriously.

But man, does it slobber! Took a good wiping down with paper towels and alcohol to clean it. I think I will need to coat some more around the engine area with epoxy.

I have the video on DV mini tape, I will try to get it on Youtube as soon as possible. It's really long and is mostly rubbish.

Congratulations on getting it to fly.
did it have sufficient power to hover ?

Thanks!

It had more than enough. It liked to stall a lot, so I did not try that. I think it was also a wee bit tail heavy, so I only flew it three times. (that was all I had before the sun went down)

congrats that you got her to fly....

Jaspur_x wrote:congrats that you got her to fly....

Thanks...

If I am lucky I will fly again today.

Happy Thanksgiving!

How`d she fly? any video?

Jaspur_x wrote:How`d she fly? any video?

I have the video on Mini DV tape, and am working on uploading it.

Nice man, looking forward to it! Glad you continue to have successful landings, you did a good job on it.

shell shock wrote:Nice man, looking forward to it! Glad you continue to have successful landings, you did a good job on it.

Thanks!

This uploading from DV junk is harder than I thought...

Thanks can't wait to see it!

I flew it again today. Did good, but I now realize it's bad habits.

It flies too fast for the schoolyard I fly in. If the engine cuts off at the wrong time, it goes in the trees - very little control with no power.

It stalls a lot.

It runs rough and throttle response is poor in the air. Is it too rich? too lean?

Good news on the engine, though. Low end RPM is around 5,000. High end is in 14,000 - running a little rich. I think that is pretty darn good considering that is as low as the engines with all that fancy rear airbleed throttles and type B head conversions. It would sit there on the ground obediently until I gunned it into a vertical climb. High end even better, with a 6X3, snap starter (cam type), muffler, and a throttle ring. That "nasty" nylon backplate has survived a WOT dive and several nose-overs with no problem.

So, all in all, I am very satisfied with the plane. Holding an .020 next to it, I do not see any possible way it could pull it through the air.

Hang in there, seeking help with the video.

Hi It would he more like a trainer again with the .020 but more fun with the BW.

Well, I still cannot get the flight video up, so I uploaded the maiden flight and crash.

Enjoy ~

That thing quick!
I flew the electric one yesterday

The plane went crazy with this engine.

Well that's what happens when you put a .049 on a 7oz plane

Thats a snappy little unit. Congrats!

If you do a bunch of epoxy repairs, make sure you rebalance before flight, side to side and nose to tail. A little bit of weight here and there added onto a small plane drastically affects the way it flies.

I feel for you. I could feel my muscles tense just before impact. What prop are you using? Maybe a 6X2 might slow it down a bit while still delivering the necessary oomph (thrust). Get it back up and going.

Good luck,

Bob