Specialists from the Krylov State Research Center and the R.E. Alekseev Central Design Bureau for Hydrofoil Ships have developed a new geometry propeller for Valdai 45R vessels (Project 23180). This design solution has increased the service life of the propulsion unit and reduced the cost of its repair during the inter-navigation period.
The press service of the R.E. Alekseev Central Design Bureau for Hydrofoil Ships explained that initially, Valdai 45R vessels were equipped with a wide-bladed propeller with six blades of a segment profile. However, after 400-500 hours of operation, cavitation erosion spots appeared on the pressure side of the blade.
Engineers proposed using a propeller with wedge-shaped blade sections and an interceptor on the trailing edge. This design is characterized by high propulsive qualities (the ability of the vessel to develop a given speed with minimal engine power).
About Valdai 45R vessels:
The single-deck river hydrofoil boat was put into operation in 2018. It is designed for high-speed passenger transportation in areas with a temperate climate.
Vessel characteristics:
- Length - 21.3 m
- Width - 5.2 m
- Height - 6.3 m
- Displacement - 21.4 t
- Speed - 65 km/h
- Passenger capacity - 45 people
Read more on the topic:
Two dredgers of Project 2040 will be built by Rechflot specialists for GTLK
Now on home
Start of deliveries scheduled for 2027
Over 51,000 new motorcycles were sold in Russia in 2025
The car will take at least a year to assemble
The application's audience has reached 20 million users
The model will be included in the list of cars for taxis, price - from 2.25 million rubles
All parking lots of the "Administrator of the Moscow Parking Space" are connected to the service
The cars will be supplied to the Moscow Transport Service Directorate
Deliveries to India may begin in 2028
The technology provides automated search for all types of defects in power units
The plane flew 500 km, accelerating to 425 km/h
The plant stated that the information about the termination of purchases for models 6 and 8 is not true
Scientists are using the "Ekran-M" installation