QJ8 Data Page Kit:          QJ8 EX Viper Motor:     Medusa MR-036-050-1000-5 ESC:        Castle Creations 80amp controller Batteries:  all information was gathered using rcevproducts.com                   HECELL lithium batteries               The QJ8 EX Viper helicopter available at helicopter hobbies is a great helicopter. The quality is second to none and the flight characteristics are great. The original setup did not yield it self well to 3D flight. The helicopter needed a better motor battery combination to attain the power that I really needed. Harold at helicopter hobbies did a great job with helping me find the motor, and I put the battery pack to this machine. I chose to run this helicopter on 6s. I started with the 6S 2100 MAH 20C HECELL lithium battery pack form rcevproducts.com and the Medusa MR-036-050-1000-5 motor from helicopter hobbies. This setup has proven it self to be powerful so I decided to install the easy to use Eagle Tree data recorder. I found this recorder to do a great job for me and am now choosing to carry it in my store. (Coming soon)             The first graph you will see is the data gathered from the 2100 MAH test. The maximum amp draw I was able to achieve was 32 Amps. The voltage drop during this test was a little excessive, down to 19 volts. The maximum amount of watts I was able to achieve was 590 watts. This battery motor combination yielded me .79 of a horse power. I felt that this motor was capable of a lot more so I moved on to a 3000 MAH 15C HECELL battery pack. Amp draw and voltage graph 2100 MAH   Watt Graph 2100 MAH               The next set of graphs you will see were produced by the Medusa MR-036-050-1000-5 motor and the 3000 MAH 15C lithium polymer battery. My maximum amp draw during this test was 33 amps. This is a one amp increase of the 2100 MAH battery pack. You can also see that the voltage drop was not nearly as significant as the voltage drop displayed during the test I ran on the 2100 MAH battery pack. Given the extra amp hour of the 3000 I was able to lower the internal resistance of my power system. This allowed the voltage drop to be significantly less than the 2100 MAH test. The higher you can keep your voltage during a flight the less the motor has a tendency to bog during high power consuming maneuvers. The maximum amount of watts produced during this test was 690 watts. This is a 15% increase in power over the 2100MAH battery pack. That is a considerable amount and made the helicopter even more powerful than before. But with the advent of the new HECELL 3000 MAH 25C batteries available at rcevproducts.com I was hoping to achieve over 1 horse power. Amp draw and Voltage graph 3000 MAH 15C Watt Graph 3000 MAH 15C               In the ever evolving world of lithium battery technology higher C rated batteries are becoming easier and easier to find. We now carry 25C battery packs on our store. These have proven to perform on the QJ8 EX Viper helicopter. I felt that since 15C was good, 25C would be great. I was not prepared for the latest data that I was able to log on my machine. The graphs below show the power that was produced by the Medusa MR-036-050-1000-5 and the HECELL 3000 MAH 25C battery. The max amp draw during this test was an astonishing 36 amps. The voltage during this test was very strong with a low voltage of 21.82 on a battery pack whose nominal voltage is 22.2. The amount of watts produced by this system was also astonishing, 807 watts. That is 1.08 horse power in a helicopter with 420mm blades. This machine will perform with these batteries.   Amp draw and Voltage graph Watt Graph   You can see by these graphs, mainly the 3000 MAH 15C graph vs. the 3000 MAH 25C battery, that the battery packs continue to get better and better. I can not wait to see what comes about in the way of battery technology in the next few years. This helicopter on this setup is clearly the way to go. No stretch or new frame needed to make this helicopter fly; you too can have a QJ8 EX Viper helicopter with this setup. You can contact me about more information on this helicopter and this setup at: neil@rcevproducts.com