I did not have a radar gun or any other reliable method to determine the maximum speed of the Eurofighter but I was more than happy with the performance that the 90mm fan provided on the 6S4000 battery that I was using. I was able to get slightly more than the advertised flight times of 4 minutes with relatively conservative throttle settings. I was getting around 5 minutes of flight time while draining only about half of the capacity of the battery. I can only assume that this time will go down with more aggressive throttle usage. Read the full review/article loading with pictures http://www.rcuniverse.com/magazine/article_display.cfm?article_id=1238 http://www.rcuniverse.com -World's Largest Radio Control Community http://www.rcuniverse.com/market -Buy, Sell, and Trade RC http://www.rcuniverse.com/magazine -Read Radio Control online reviews and articles http://www.rcuvideos.com - Watch Radio Contol Videos http://www.wattflyer.com -Discuss Electric Radio Control Aircraft