just had to reply to this since i recently acquired a 90% completed scratchbuilt waco from a guy but mine is 1/3 scale, has 121 inch wingspan with over 4k sq in of win area, wing loading of 26oz, and weighs 50-55 lbs estimated

.. here is a pic of the paint scheme i plan on using...

planned on usin a 3w140 but even though it barely fit in the cowling the plug wires wouldnt have...so im still searchin myself but hard to get info when nobody makes em this big... have found info online of a company in germany that makes these this size but no other info than that....