Thanks for the details on the Ramtec Mark. I checked out the new 16s set up and that 510 motor gets the current down nice. The Ramtec is an awesome fan. At those power levels the aluminum housings are essential to sync the heat. Thats the thing with the plastic fans, they work fine if you don''t get them hot.
JoFro you are getting good results with your fans. If your 9 blade fans are the early Haoye versions sold on Hobby King then their plastic housings are holding up great, and that's good to hear. Nothing wrong with "ämp hogs" all power is the same but heat is always the enemy. You get good cooling in your designs with the open air flow. Internal mounted fans don't get that. High volt and low Kv will get the current and heat down. This Arson fan will certainly make a ton of power. Its a whopping 6". Its just a matter of design to get all the parameters dealt with including the heat.
Cheers,
Dean