The motors are the same size as the reef racer and the reef racer is a lot smaller! You won't get anywhere near 30mph, more like 10mph judging from the video.

Understand the features of the reef racer vs that whale thing.

Reef racer has NiMh battery pack
30min 12v field charger ( 3A power supply will work, most use a car battery )
water cooled 380 motor
proportional throttle
proportional steering
Hull is self rightening

You can literally foot ball toss this in the water to launch the boat, watch the video on towerhobbies.
http://www3.towerhobbies.com/cgi-bin...=LXMPG3**&P=ML

The only disadvantage I see is no wall charger comes with the hull, you must use a 12v supply.

Ryan