This is a .10 size bipe that has a .15 OS in it. I flew about 5 years ago and a guy traded it to me. It has foam winds with a balsa body. I have no idea who makes it. The plane is sitting next to my tower trainer.

My best guess would be an Ace Hobby Simple Ultimate kit:

http://www.acehobby.com/ace/ACE4252.htm

Check your wingspan against the kit dimensions, and see if this is it.

Yeah thats a simple series ultimate bipe..from Ace Hobby..it needs at least that .15 to fly well as I understand ..I have the kit, but havent built it yet, nice covering job on that one...Rog

Sorry to echo the others, but definitely a simple ultimate. I hear they really scream with a Norvel .25 on the nose.

Thanks guys, i really didnt know what it was lol. Its going up for sale