Performance

 The desire to develop a new generation, strong performing and reliable power plant led to the decision to use the GM LS 3 series engine for a range of aircraft applications. The design of the 480/495 HP version that we have put in our Bull Moose was such that it was built for continuous high RPM by the use of a special camshaft and valve train for that application and a very flat torque curve. Those elements and the readily available power plant made it an obvious choice.  It has proven to be a light, compact and high power to weight ratio engine which is demonstrating it's reliability in many applications.

The 430 HP version is an excellent choice for an owner wanting greatly improved performance and operational economy beyond the currently available standard aircraft engines for either the standard SR 2500 or SR 3500 airframes. 

 The dyno chart shows the "sweet spot" of this engine to be at 5,200 RPM producing 480 HP and 480 ft-lbs. of torque, which is a perfect match to our 2.11:1 PSRU giving a take off RPM of approximately 2,500 for the propeller.  Engine cruise RPM of 4,000 produces 330hp, 450 ft-lbs of torque, and gives a prop RPM of just under 1,900, making for very strong and economical operation.  

 All of the same proven components are used in this package.  The 525 HP version is an excellent choice for an owner wanting greatly improved performance, particularly for float operations.