Tech­ni­cal da­ta

Modifications for HALO: From business jet to research aircraft
HALO (High Altitude and Long Range Research Aircraft), the new research aircraft of the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR), is complete. In a 20-month project, RUAG Aerospace Services have converted the brand-new Gulfstream G550 from a standard business jet into the state-of-the-art and highly specialised high-altitude research aircraft for DLR's atmospheric research activities. The graphic shows the modifications on the upper and lower fuselage.

HALO Gulfstream G550

Technical data

HALO Gulfstream G550


31 metres (including 1.6 metre nose boom)


7.9 metres


28.5 metres

Cabin length

11 metres

Cabin width

2.24 metres

Cabin height

1.88 metres

Seating capacity

19 (normally 3 crew members and 5 to 8 scientists

and engineers, depending on the instrumentation)

Empty weight

22.23 tonnes (49,000 pounds)

Take-off weight

41.28 tonnes (91,000 pounds) maximum


two Rolls-Royce BR710 engines


2 x 68.4 kilonewtons (15,400 pounds)


over 8000 kilometres, depending on the mission profile

and payload

Flight altitude

max. 15.5 kilometres (51,000 feet)


max. 340 KCAS / Mach 0.885 / 1054 kilometres per hour

Fuel capacity

18.73 tonnes (41,300 pounds)

Original purpose

Business jet, military usage

DLR Flight Facility



Falk Dambowsky

Head of Media Relations, Editor
German Aerospace Center (DLR)
Corporate Communications
Linder Höhe, 51147 Cologne
Tel: +49 2203 601-3959