I finally decided to try real Control line again. The E Super Clown is ready for flight tests. The power system is a loose copy of Alan Hahn's post in the "list your setup" thread. Motor is a Turnagy TR35-40C (2820 with Kv=1100). Prop is an APC 10x7E. ESC is a Suppo 50A helicopter control with governor mode. At 8500 rpm the static current on 3S batteries is around 26 amps. Since I fly RC a lot I am using RC throttle control. This allows mid-flight power level adjustments. The battery system is made up of 3 1/2A sized batteries in parallel, Two 3S 850 mah Hyperions, and one 3S 500mah Turnagy for a total of 2200 mah. All are rated 20+ C. The pix show the setup.

Good job ,Jim!

That battery arrangement is pretty interesting. It lets you distribute the batteries around to take advance of different size open spaces.

-Chris

To be safe I limit the time to 4 min. This is a little shorter than the usual 6 min but I am a beginning level flier.

Here is my math. A 2200 mah pack will deliver 22 amps for 6 min. When delivering  26 amps the time is reduced to
(22/26)*6= 5 min. To keep from completely discharging the batteries I stop at 4 min. This keeps the batteries from getting hot and allows many recharge cycles.

The actual average amp draw in flight is less than 26 amps so my calculation is conservative. For full 6 min flights I would use a battery around 2600 mah.

I hope this helps.