An 80 inch bipe? Wow! I know Ohio R/C (R.I.P.) had a 75 inch Ultimate (I think 33%). Maybe get a set of plans and stretch it to 80 inches. 2 1/2 inches each way per panel isn't much of a stretch. The wing is a swept from center wing with a constant chord. It actually is much simpler than an Extra or Cap wing. You talking 100 cc + engine? Also just a roumor that Hangar 9 has a 46% Ultimate ARF that mat one day be a reailty.