Or that's the claim at least LOL. I've had a couple magnum's, and while they're fast, I find this one a little hard to swallow.........
I have the same aircraft and yes, it is very fast. I've got a Wesson .51 with a tuned pipe for power and we clocked it at 239 MPH in a dive. I run a 9 X 6 prop and an 8 X 8 for maximum MPH. I love mine!
From this ad, one of the replies...
http://www.rcuniverse.com/market/item.cfm?itemId=282323