Prop for OS46
The prop used for the OS 46 was a 9-7 APC. turning around 16,200 on the ground. The Speed trap is made by r/c model research in Odessa Texas. It was purchased in 1995 and have no idea if the guy is still making them. Click and enlarge the image of the speed trap photo. The phone # is on the face of the readout panel. Hopes this helps you. We'll be flying a new Whiplash with a new Jett 50 this week some time. Will post the speed results afterwards. Should be interesting. By the way, what prop are you spinning on your Jett 50? The RPM's sound very low on the ground...
Dan, ACM