I'd say roughly 80" - - if he never comes back to his thread to state otherwise.
Can't wait to see the thread of his conversation.



Forget the w.s. and engine size,
he has to modify the firewall,
replace the engine mount, secure that,
take that battery out and put in a fuel tank with modifications to allow for it.
Then he has to find a spot for the throttle servo, the linkage, and add more tail weight to find the new CG, which he doesn't know where that is either I bet.

Was this ever a glow model to begin with? What's with the bulge down the sides of his fuselage? That's not scale,
.91 4 stroke seems to be a fits all engine for these cub models.
All things considered, I'd go get a Something Extra, an Ultra Stick, or Ultra Sport if you can find one, and never bother with a Piper Cub again.
but that's just me.
Two specs attached, CG and SIG 1/4 scale,
the 1/4 weighs 12-14 lbs and has 108" w.s.
7-8 lbs on the 40 size CG.