Clipped wing Super Cub

[19000rpm]

That's me: Old and slow.

Next Steps:

I'll be working on the tail section next. Adding some CF reinforcements and hinge material.

The fuse is the final part of the basic building project and fitting the 2200 battery and rather large ESC in the equipment area.

I'll then work on the wing struts and landing systems.

I may not get these things done in the exact order as above. ;D

Paint and graphics will come after the maiden...For obvious reasons.

[Gabe]

Man did I learn my lesson about painting before the maiden flight.

[19000rpm]

I cut grooves in the horizontal and vertical stabs for 3mm CF tube reinforcements. I CA'd these in. I also added a strip of CF to the elevator.


I notched out the plastic tail holding assembly and ran the CF to through that and CA'd it. I added a Dubro Parkflyer size control horn that are both screwed and CA'd in place. I moved the control horn assembly from the stock location to a meatier part of the rudder and partially overlapped the sterrable tail wheel assembly. I replaced the stock wheel with a 1" diameter Dubro wheel.


A pic of the horizontal stab and elevator with CA'd CF in place and control horn attached.


The 2 1/2" light weight Dubro "Tundra" style wheel hub hole is a little large for the wheel shaft so I added a 2" X 1/2" strip of adhesive aluminum tape axle for a better fit.


The Tundra wheel next to the stock wheel. The stock wheel is OK for smooth surfaces; the Tundra wheel for grass strips...Uh, I meant Tundra strips. Actually I might go up to the 3" wheel.


Just had to kind of slap it together to see what it's all going to look like. Looks pretty close to my idea.

[Gabe]

I didn't even know they made aluminum tape. I had the same problem with the axle hole on the 3" Du-Bro wheel so I abandoned the process. Did your LHS stock that tape?

[19000rpm]

Got it a the local hardware store.

[akent]

Awesome!

[19000rpm]

The Electronics: PKZ Bind & Fly Rx from a Bind & Fly Super Cub, Eflite 40A ESC and Tenergy 2200mAh 25C.
I chose the Bind & Fly Rx since the B&F SC is a logical place to start with performance mods.


The ESC is located where the RX used to be. I clipped the power leads from the Rx, since they are no longer needed and velcroed the Rx to the side of the fuse.


In order to accomodate the 2200, I cut the back out of the battery box and removed a little foam.


It's a very snug fit. But, that's good.

[Gabe]

Wow! Very nice. Can't wait to hear the flight report!

[19000rpm]

I'm going to maiden her this AM. I actually got antsy yesterday, the wind was blowing too hard for a maiden, so I ended up painting her too. ;D

[r/c basher]

Nice build there 19. Looking forward to the maiden flight report.

[19000rpm]

Thanks, RC!

Flight Report: Yikes. !!! End of report.

But, seriously folks without a lot of left rudder it wants to make a 90 degree right turn the second you add power on takeoff.

The tail is off the ground, ready to fly, quicker than a rattle snake strike on crack. So, judicious throttle and left rudder is the order of the day.

Once in the air, it's easy to see, that it's a bit nose heavy. A few clicks of up elevator and she tracks like a angry hornet that just found a new victim.

Is it fast? Well, 55-60 easy. Maybe 70-75 in a dive. To tell the truth, I was using throttle management and concentrating more on flight characteristics than speed.

How does she fly? Greeeeeeeeeeat! I had the ailerons on medium settings and she did nice, near axial rolls. Knife edge, no problem. Hover? High alpha? Well, kind of, sort of. The nose heavy bias makes that a little dificult. This will come with fine tuning and getting closer to the true CG.

It will land slower than a snail can crawl...A really, really, fast snail.

I think the 11x6 prop was a good choice. I might try a little more pitch, just for kicks. The 11 inch is about all I can do with the ground clearance at a minimum. Chewed the tips up a bit. I can go to larger dia. wheels to solve that.

No problem with heat with any of the electronic components.

Flight time was about 6 mins and came in with high 3's per cell. Lots of juice left for a few more minutes.

When I finish up the paint and graphics I'll post some pics.

Next: Work on the CG and think about adding the floats.

[akent]

This is too cool!
I love it!

A 3d Cub! Who'd a thunk that!

[Gabe]

Hmmm...maybe the thrust angle on the motor mount is off - causing it to veer right. Perhaps too much thrust angle?

[fireguzzi]

Sounds Cool! Can't wait to see those pics when it's done.

[19000rpm]

Thanks guys.

You're right Gabe. The only thing that could cause that much right bias is the thrust angle which is part of the design required for the stock SC firewall with the CustomRC motor mount. I'll take a few degrees out.

The thrust angle may also acccount tor some of the down flight
angle that I had assumed was all due to nose heaviness.