ORIGINAL: davewallace
Zagi,
Here is the link for a weight chart.
http://www.rcshowcase.com/html/chart.html Fifteen to eighteen pounds sounds good.
I think that you should try another tach. If you are getting 9K plus on a 20x10 you don't have to worry about static thrust.
Dave
Believe it or not that reading is correct, tached it on 2 different days. I trust the guy who measured it. He's converted more engines than I've ever seen. We were all kind of blown away by it (no pun intended). We think its probably underproped. Thanks for the chart, I think I can get it under 18lbs. Its a profile so it shouldnt be terribly difficult.