Turbine T-Rex 700 Helicopter (Esprit Model Custom Project):Here is David's latest helicopter project. He is installing one of the new Wren 44 turbines into a T-Rex 700 Nitro airframe. With the listed 6.8 horsepower output, this helicopter is sure to be fun. So far the frame modifications are almost complete and the fan shroud is just about fitted. Watch for more photos!!