Sorry to hear that Bruce. I had a similar situation a couple of weeks ago with mine, but luckily I was still about 10' or so from the deck and was able to recover before impact.

You say your flight timer is set for 15 minutes.....are you running the stock tank? What size engine is on it? With my .46 I get about 23-25 minutes on a tank. (trust me, I had to fly it dry the other day because my throttle stuck open at about 3/4 throttle)