2020年2月23日 · The Kuznetsov NK-12 is a Soviet turboprop engine of the 1950s, designed by the Kuznetsov design bureau. The NK-12 drives two large four-bladed contra-rotating propellers, 5.6 m (18 ft) diameter (NK-12MA), and 6.2 m (20 ft) diameter (NK-12MV). It is the most powerful turboprop engine to enter service. (Wikipedia: Kuznetsov NK-12)

2019年8月20日 · The absolute largest turboprop engine was the Kuznetsov NK-12, developed just after WWII. A more modern large turboprop is the Europrop TP400, only slightly smaller, used for the A400, 2 with a maximum power output of 11,000 hp = 8,203 kW. Cruise shaft power specific fuel consumption: 0.167 kg/kWh (0.275 lb/hp/h) = 51.5% efficiency.

2019年7月9日 · In a previous answer here Peter Kämpf mentioned that the first stage of the Kuznetsov NK-12 turboprop pre-swirls the flow to improve thrust creation conditions at the second stage. How does this process work?

If Wikipedia is correct the 60 years old NK-12 is more fuel efficient than the Europrop TP400, the engine for the Airbus A400M transport aircraft. For the NK-12MV a specific fuel consumption of 0.219 kg/kW-hr is given. The TP400 has a specific fuel consumption of 0.238 kg/kW-hr according to Wikipedia. Am I interpreting these specifications wrongly?

2020年11月23日 · That's why nobody even makes aircraft piston engines with more than about 170 kW. The higher power range is served exclusively with turbines. The common ones start around 400 kW and go well into megawatt range (largest turboprop, Kuznetsov NK-12, produces 11 MW and the turboshaft variants derived from large turbofans go up to the 40–50 MW range).

2024年11月29日 · The Kuznetsov NK-12 is a Soviet turboprop engine of the 1950s, designed by the Kuznetsov design bureau. The NK-12 drives two large four-bladed contra-rotating propellers, 5.6 m (18 ft) diameter (NK-...

2021年3月2日 · Based on my reading, the biggest disadvantage of hydrogen as an engine fuel is its low density. Even when stored as a cryogenic liquid, it take up more than ten times the space as the same mass of kerosene, which means the same size tanks will hold only about a third as much energy (even though hydrogen has about three times the …

2014年1月16日 · The Kuznetsov NK-12 is a Soviet turboprop engine of the 1950s, designed by the Kuznetsov design bureau. The NK-12 drives two large four-bladed contra-rotating propellers, 5.6 m (18 ft) diameter (NK-...

2020年2月14日 · With four Kuznetsov NK-12 turboprop engines, each rated at 15,000 shp, no other turbopropeller came close. The honor for the highest powered piston driven aircraft goes to the Hughes H-4 Hercules. The ‘Spruce Goose’ was driven by 8 Pratt & Whitney R-4350 Wasp Major engines at 3000 bhp, giving it 24,000 bhp at full throttle.

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