Hi Keith,
With a symmetrical airfoil shown on the plans, that makes it OTS legal and a perfect candidate for Uncle Mikey's "Scale Stunter" Award at VSC!
Heck, I would STILL put a Brodak 25 in it.!
Bill,
To keep the total weight down to the point of it actually being able to compete, it must have the 15. If it weighs more than 20 oz it's pretty much too heavy. Maybe 22 oz. (My Tigercat was just built too heavily. To do it again I would use a lot less wood, lost foam technique on everything, including fuse/nacelles with molded skins of 1/16th, etc. It needed a minimum of 10 oz less weight, 34 oz total, to fly the OTS pattern.)
That is my philosophy on my new Calhoun Smith entry for OTS at VSC (which is 200 sq's). With small ships the weight is killer, and the drag is too. I'll use .012's on it and the horn and bellcrank will be really light, 2/56 screws (seven of them), electric spinner, ElectraLite wheels, tail skid, etc. Draconian measures on the construction, Al Rabe techniques (molded fuse, light nose), Dick Mathis techniques (limited glue), Keith Trostle techniques (monocoque molded sheet stab and fin). Paint it like a rubber-powered model.
Why do I do this!
Chris...