Story ID: 
Airbus Begins Assembly of Racer Compound Helicopter
By: Mark Huber
Caption: Airbus Racer  isexpected to demonstrate increased speed and reduced emissions and noise. 
Word Count: 521
Airbus Helicopters is pushing off the first flight of its compound Racer—which stands for rapid and cost-efficient rotorcraft—to 2022. A company spokesman said the delay was the result of “the slowdown of several production lines caused by the pandemic.”

When announced in 2017, Airbus said Racer would begin flights in 2020. Despite the delays, the program already has achieved significant milestones, including passing critical design review in 2019 and more recently the manufacturing of long-lead items in 2020, with major components such as the canopy, the composite side shells, and the tail boom already delivered. Assembly of major subassemblies also started last year, and the spokesman said Airbus Helicopters expected to launch final vehicle assembly in “the coming weeks”  at its production facility in Merignane, France.

The fuselage, a hybrid of metal and composites, is scheduled to be delivered this month. The main rotor blades are from the super-medium Airbus H175 and the avionics are an adaptation of Airbus’s familiar Helionix system. The aircraft employs conventional, as opposed to fly-by-wire, flight controls.  Altogether, more than 40 partners from 12 countries are participating in the project providing key components. “It is a very active collaboration,” said program director Brice Makinadjian.

The Racer is designed to cruise nearly twice as fast as a conventional helicopter, with cruise speeds up to 220 knots. At cruise speed, roughly half the helicopter’s lift comes from its fixed wing. Target range is 400 nm and in executive configuration, the aircraft will be able to seat six to eight passengers. The aircraft is derived from the European Commission's H2020 research program as part of the Clean Sky 2 initiative. It is powered by a pair of 2,500-shp Safran Aneto-1X engines that provide 25 percent more power than similar-sized engines.

Up to a 15 percent reduction in fuel burn can be achieved when one of the two engines is placed in standby mode during cruise flight, a configuration Safran calls "Eco Mode." Makinadjian said the standby engine can be spooled up in ten seconds or less and that the fixed wing-mounted propulsors can operate from either or both engines. “An advantage is the simplicity of the system. It works like a twin-engine helicopter. All the drive system is connected and everything is linked,” he said. 

The flight test campaign will be used to validate the aircraft against the Clean Sky goals of 20 percent lower CO2 and NOx emissions and less noise than current helicopters. Makinadjian told AIN that the noise goal is a reduction of 20 percent compared to conventional helicopters. He said that noise reduction will be attained in part via adapting the speed of the main rotor to minimize the noise and by having the ability to tune the attitude of the aircraft with a flap system on the wings and vertical and horizontal stabilizers. The flaps will have the ability to move automatically or with flight system loads. 

Following first flight, Airbus plans to take up to a year fine-tuning the technology demonstrator aircraft before campaigning it to make mission demonstrations including air ambulance, search and rescue, and law enforcement.