Good point DB. The other way to tell is that the little numbers molded on the blades in by the hub should be on the front side of the prop. And just saying it's a Cox nylon 6x3 doesn't mean that it's not one of the bad ones they used on the control line RTF models. If it's one of the stiffer props that looks like a Master Airscrew type then it should be fine.

My experience with Baby Bees is that they will run for between 1 1/2 to 2 minutes on 25%. And for a dizzy little kid in the center of a control line circle that seemed like just about forever...

In the past I've flown a 10 oz 30 inch span model on a PeeWee 020. I also flew a Jr Falcon with my old original Baby Bee and even at well over 20 oz it still climbed strongly enough to get me in trouble and crash on the first flight near the end of the run. Based on all that I figure a basic Babe Bee should be able to fly this thing fine but not in an overly fast manner.