A. J. Clark

Now that's cool.

Pond Skipper

Well done, lovely bird and made good power even on one engine.
Did you test fly the other project?

H5606

Thanks; not yet -

This is the odd thing I've never seen before - fluid-like blister that leads to the hub.




Tornado prop with fluid-filled blister emanating from hub -

Pond Skipper

Unheard of until your photo.
I have seen and used plenty over the years, since the 80's no issues.

H5606

Squeezing the fluid in the blister from the tip toward the hub traces back to a point close to the hub that lines up with the pushrod connecting with the power switch. Even though its only on one blade, I suspect this was the reason for the blister as I had some concern over the vibration of this unsupported length of wire past the front of the firewall and perhaps switch failure.

Pulled out that whole pushrod system and went with a more conventional switch activation by tapping the switch hole for a 2-56 screw and slotting the side of the fuselage. A remove-before-flight clothespin is supposed to keep me from forgetting to switch on -


Switch extension rod contact point -

New means to operate switch -

Remove before flight safety pin -