P80 (rocket stage)

P80 being transferred to the test stand
Country of origin	Italy, Netherlands, France, Belgium
First flight	13 February 2012
Designer	Avio
Manufacturer	Avio, Snecma
Application	Main stage solid-fuel rocket
Associated L/V	ESA
Status	In use
Solid-fuel motor
Propellant	Hydroxyl-terminated polybutadiene (HTPB)
Casing	Carbon-epoxy filament-wound
Performance
Thrust (SL)	2,261 kN (508,300 lbf)
Isp (vac.)	280 s (2.7 km/s)
Total impulse	240,470 kN s
Burn time	109.8 s
Propellant capacity	88,365 kg (194,811 lb)
Dimensions
Length	11.714 m (38.43 ft)
Diameter	3.005 m (9.86 ft)
Dry weight	7,330 kg (16,160 lb)
Used in
Vega
References
References

P80 is solid-fuel main-stage rocket engine used on a European Space Agency Vega Rocket (in the P80FW version). It is the world's biggest and most powerful one-piece solid-fuel rocket engine.

The P80's development was led by a joint team of ESA, CNES and ASI since 2005, with Avio selected as the prime contractor. The first test of the P80 engine was completed at Guiana Space Centre in November 2006 followed by qualification tests in December 2007. The first launch was completed on 13 February 2012, with the first commercial launch following on 7 May 2012. Total development cost of the engine reached €76 million.

P80 is a single monolithic solid rocket motor propelled by hydroxyl-terminated polybutadiene which burns for 109.8 s and is jettisoned at an altitude of 61 km after achieving a relative speed of 1.7 km/s.

The engine shares specifications with Ariane 5 solid rocket boosters - it has the same 3 meter diameter and similar height to the largest segments of the booster. This allows using the same facilities and equipment at the Guiana Propellant Plant for loading the propellant and transporting the engine to the launch site. The nozzle of the P80 is also a direct evolution of the one used in Ariane 5 boosters.

The manufacture process is divided among several European companies. Italian Avio manufactures the main motor case loaded with fuel, performs integration of the components, and final testing. French-Italian Europropulsion manufactures the P80 motor while Regulus performs propellant loading. Aerospace Propulsion Products BV from Netherlands builds the igniter. Belgian SABCA produces components for thrust vectoring and the staging skirt. French Herakles manufactures the engine nozzle.