From Appendices A3/6 and A4/6: In 2008, North American General Electric acquired Czech Walter Engines

-It has begun by building 135,000 m2 of dependencies near Letnany and it took the turboprop M-601 as the base for the first engine, modifying it, polishing it and improving it. They called it the H-80.

“The genuine Walter M-601”

“The new H-80”

-It is expected to deliver the first engine by the year 2010. It will deliver 800 SHP (Shaft Horse Power).

-In GE the section of small turbines is known as BGA or Business & General Aviation Turboprops.

-With the acquisition of Walter by General Electric, the offer of its engines has changed. It is centered on the modernized and much improved version of the old M601, now known as H80.

-We reproduce a classic photo of this engine.

“GE Av. H80”

From Appendix 9: Since 2008, North American General Electric has acquired the Czech Walter. With the interest in developing the star product that I had in those
moments, the M601 turboprop engine.

-It is a direct competition with the PWC PT-6, although after it has applied improvements and new techniques to reach the western market.

-The M601E-11 and also the H75, H80 and H85 are clearly based on the Czech original.

-All variants have the same appearance and size (1'670 meters long) and can use most propeller assemblies in their category.

“The H75”

-Within H75 reference, the power of 750 SHP is also indicated. The H80 delivers 800 SHP.

“H80 engine, 800 SHP”

-It is a free power turbine engine so it is this turbine that drives the propeller at 2,080 rpm, through the corresponding gear.

-The engine has a reverse-flow gas generator from rear to front with a compressor and its turbine that is independent of the propeller shaft. It rotates at about 35,000 rpm.

"Triptych of the new H-series"

-The H85 engine delivers 850 SHP (power to the shaft) and 898 effective power (ESHP).

-It has a reliable construction without hot zone inspection. Ideal for aerial and agricultural use. It delivers 750 SHP.

“From a GE Aviation Czech brochure”

From Appendix 10: The old Walter has recently been acquired by American General Electric. Its main product is the H-Series that are based on the Walter 600/601 and 602 turboprops, with major improvements.

“New GE-Czech H-series”

-It is suspiciously similar to the PWC PT-6, although I do not know who could be the inspiration of who. (Something similar happens with the Allison 250 and its Russian equivalent Glushenkov).

"Whole and cutaway"

"Combustion chamber and gas generator turbine"

-The combustion chamber is reminiscent of the Turbomeca ones.

-They use Szydolowski patents, where the fuel comes out through the center shaft that is drilled as a sprinkler. Thus, saving the complicated multiple injectors (usually Duplex)

"Power turbine and reduction gears"

-The propeller reduction gear is of the planetary type.

-New photographs of Walter's old engines that are being updated by the new owner of the company, General Electric.

“New General-Electric engine (ex Walter)”