The 35-48-1100 came this weekend. I will be going to the field tonight after work. I also bought some 9 x 7.5 props to try. We'll see how it goes. I went to the Dualsky site and see that they rate their motors the same as Turnigy does. Going to higher cell count makes the rpm and power come up quick, but the weight comes with it. I want to try to stick with 4S for now. With the Viper starting out heavy out of the box, I would stay with the 4S 2500's and go with the 35-42 or 48 length motor as close to 1000-1100 Kv and use a 9 x 6 or 9 x 7 prop. You will outrun most things on the field without tuned pipes or turbines. LOL

I'll post the results tonight when I get back. I got the Eagle Tree in it this time to get some inflight data as well.

Take care,