European Facility For Airborne Research

European Facility For Airborne Research April 19, 2019, 07:18

Aircraft: Egrett - Grob

Egrett - Grob
Aircraft acronym Egrett - Grob Registration number D-FHHH
Operator Grob Aircraft Transnational Access status Closed to TA
Manufacturer Grob Aircraft, G520T Egrett Engine category Turbo propeller
Aircraft type Research Categories


  • Length: 13.67 m
  • Height: 5.66 m
  • Wingspan: 33.0 m
Airplane dimensions 13.67 m 5.66 m 33.0 m

Flying performances

Min speed 46 m/s
Max speed 122 m/s
Usual speed during measurements 100 m/s
Usual speed during transit flights 122 m/s
Ascent rate 7 m/s
Min altitude
  • Above sea: 230 ft
  • Above ground: 230 ft
Max ceiling 50 000 ft
Usual ceiling during measurements 49 000 ft
Ceiling limitations


Empty weight 3 697 kg
Max take-off weight 4 700 kg
Max payload 1 003 kg
Max scientific payload 600 kg (X-coordinate of 2nd point)
Usual scientific payload during measurements 400 kg
Scientific payload for max endurance n/c

Max endurance at min scientific payload and max fuel 9 h (Y-coordinate of 1st point)
Endurance at max scientific payload 4 h (Y-coordinate of 2nd point)

Max range 3 000 km (at min scientific payload and max fuel)
Conditions for max range

at FL350, no scientific payload

Range at max scientific payload None km
Usual range during measurement flight 2 000 km

Weather conditions limitations

IFR, VFR, no flight into known icing conditions when external stores installed

Take-off runway length 700 m

1 x Honeywell TFE-331-14



Crew and scientists on board

Crew (pilots + operators)

1 - 2

Seats available for scientists



Length n/a m
Width n/a m
Height n/a m


Cabin pressurized


More information

small 19" instrumentation rack behind rear seat

Aircraft modifications

Nose boom

no, but turbulence probes under wings available


depending on payload bay - maximum currently approximately W0.5 m x L0.5 m, but can be longer;
facing down or sideways


depending on payload bay - maximum currently approximately W0.5 m x L0.5 m, but can be longer;
facing down or sideways

Hard points

1 hardpoint under both wings (up to 60kg each)


several available

Additionnal systems

Fuselage Bay (U-Bay) - up to 250kg payload;
two Bays available, but only one can be flown at a time

Acquisition systems

ARA PC-based data system for analogue and digital inputs, real-time display, watch dog timers, large data screen in rear cockpit for mission specialist/scientist

Electrical power

Aircraft total electrical power (kW)


Electrical power (kW) and voltages (V) available for scientists

115 VAC 400 Hz 5 kW max, plus 28 VDC 100 Amp, 28 VDC 200 Amp

Back to top

This project has received funding from the European Union's Seventh Framework Programme for research, technological development and demonstration under grant agreement no. 312609

Copyright © 2019 EUFAR All rights reserved.