The Inertial Dyno was constructed in the shops of JFA Custom Engines. Owner John Ackerman has built engines for all type model applications, including Model Boats, Model Car, Model Airplanes, Ducted Fan Airplanes, and many other applications. This shop houses the BEST equipment in the model engine business and includes Precision Lathe & Milling Machine, Sunnen Hone, Helical Lap, and uses MWD & Associates Engine Analysis Software. To visit the Web Site of JFA Custom - Click Here !