Between 1919 and 1947 the WACO Aircraft Company of Troy, Ohio built almost twice as many aircraft as any other manufacturer. The jewel of their efforts was the Waco YMF.
In 1983 the Classic Aircraft Corporation decide to reincarnate and re-introduce the Waco YMF as a modernized FAA certified production aircraft. Never before has a company taken a fifty year old design and remanufactured it as a modern certified aircraft. To achieve this goal Classic hired experienced engineering talent from other certified aircraft producers. They made more than 300 engineering changes requiring over 1400 drawings and the building of new specialized tooling. Each modern Waco is hand built by fine craftsmen utilizing modern materials and requires more than 5000 labor hours to complete. The YMF-5C was further improved by adding greater internal width, more legroom, increased useful load, a front enrty door and aerodynamically improved flying surfaces.
The Classic Aircraft Company can justifiably claim to build the safest, most reliable and highest quality biplane available. It is powerful and stable. Fly in a piece of aviation history At any airport the Waco is the star attraction.
The Jacobs Aircraft Engine Company was formed in 1926 in Philadelphia then moved to Pennsylvania where in 1933 they developed their most famous engine, the seven cylinder L-4 engine developing 225Hp. This engine had a displacement of 12.4 litres. It was better known by its military designation, the R-755. Jacobs was known as the best producer of engines in the 200-400Hp range and was the first to make engines using forged aluminum pistons, sodium filled exhaust valves and magnesium alloy crankcases. The engine was used during WW2 mainly in the Cessna Bobcat, Cessna 195 and Stearman Kaydet. Due to the engines tendency to vibrate at low rpm (you will feel this as we throttle back in the circuit prior to landing) it was given the nickname “Shakin’ Jake”.
After the end of WW2, thousands of completed Jacobs R-755 engines were left pickled and stored. Even thought these engines are brand new from the old Jacobs factory they are completely disassembled and modified by Air Repair of Cleveland, Mississippi, before being incorporated into a new Waco YMF-5C. Dozens of improvements to key components, such as valve guides, piston rings, engine case and most importantly seals have been made. An indication of how successful these measures have been is the fact that the TBO (Time between overhaul) has increased from 600 hours for the original engines to 1,400 hours for the modern engines and the power output has increased to 275Hp.