RE: Sig Kougar Build
Ya the thrust is no problem, some calculations show it can be done with a 4 cell, 5 is better. The problem is that fan units are ahead in tech of motors which are ahead of batteries. The project has to have a decent flight time at a decent price. I am working numbers for 5000Mah 30C which are pretty reasonable from hobbycity now. But those A123's really show promise at 60C discharge. The prop Kougar was pretty light until I dropped that 18oz battery in the front.