E Sledge and Nippy
 

Jeff Williams E Sledge and Nippy 0808.

Flying weight 9.5 oz
Kokam 340 3S1P
Jeti speed control
blue bird servos
APC 11x4.7 slo flyer
Carbon gear struts and lite wheels (less than 3/4 oz)

5 minutes (time limit in our gym). Torque rolls at 1/3 to 1/2 throttle depending on battery state. 9 amps max throttle.

Nippy motor mount
 

This took about 1/2 hour to make. It allows a quick dis-assembly of motor and ability to install unique rubber band prop saver.

K&S 7/16 aluminum tube.
1/16 aluminum sheet stock
kevlar or similar thread
short 4-40 screw
CA
epoxy-micro balloons or your favorite light strong glue
scrap stick balsa filler

Tube needs to be drilled out slightly for nippy bearing housing shaft (Nippy uses metric sizes). I tapped a small piece of aluminum sheet for the 4-40 bolt, wrapped it tightly with the kevlar to the tube front, and CA'd in place with kicker

Then epoxied some scrap balsa inside the rear portion of the tube, and drilled it down the center to match Jeff's carbon tube.

Remove some foam to clear the aluminum tube assembly, and clean up the carbon tube so it will slide on, then smear epoxy and filler to glue in place. You can certainly use less epoxy and filler than I did. I was using 5 minute on two airplanes and didn't have time to clean the extra off.

I actually dind't glue the balsa to the tube (in case I needed to change the mount)

RE: Nippy prop saver
 

This works great for the APC slow fly props.

I used:

A 1/4" piece of brass tube sized to fit the Nippy shaft
filler hub supplied with APC prop
#64 rubber band

You need to dis assemble the motor to install the rubber band, but this is easy to do, and you don't need to change the props that often. (see next post for details)

I shaved the corners of the 4 circular holes where the rubber band threads in and out to minimize chafing.

Pic shows what happens if you hit the ground -- prop just pops off. This has saved many props and motor mounts for me.

RE: Nippy prop saver
 

sorry about the focus. My macro isn't that good on this camera.

Just a simple e-clip removed or installed with a screwdriver.

RE: Nippy prop saver
 

This plane is a riot! I've already dorked it many times so you can see it's dinged up a bit, but the gear and overall design has held up well.

RE: E Sledge and Nippy
 

Very cool stuff... I'm about to finish my BluCor E Sledge... Just need to connect the control surfaces and hinge the aileron's.