hey steve...
mines a 72" WS and i have my RCV .90sp ready to drop in...
this has been a real project for me, the plans im working from are pretty old and have seen better days lol, the info on the plans E.G engine size/name has been lost but all the important bits are there, i only know the WS because i measured it from the plan
it uses very old construction methods and as i said above i have built a second top wing as the first wing i built (to plan) seemed very weak, and funny enough the guy i had this plan from said he built the plane many moons ago but ...... you guesed it the top wing broke up in mid flight
...
i have had to redesign a lot of the plane as there were things i didnt realy like but its comming along now and as reagards the engine im just going with my gut on this planeas i have no idea what size it was designed for but a 90 4s sounds about right, so fingers crosed it should all go ok on THE DAY
thought of a color scheme for yours yet? iv changed my mind sooo many times and i still dont know LOL there are so many