The YS 1.10 is about the perfect engine for the Excelleron. I don't know that I've ever
climbed straight up for 500 ft. but a normal vertical pull for a large pattern maneuver
is probably at least 300 ft. and it makes this with ease. I broke mine in with an APC 15x8
pattern prop and Powermaster YS 20x20 fuel and now use an APC 15x10 pattern prop and
Powermaster 30% heli fuel. Still run it slightly rich and has more than enough power.

Carbon fiber gear and wheel pants are Bolly , (f3A Std.) , purchased from Precision Aero Composites.
You'll need to move the gear about 3/4 in forward because they slant backward slightly.

tommy s