Twin II and Twin II acro G 103A Grob   

General Details
Manufacturer: Grob
Plane Name:

Twin II and Twin II acro G 103A

Classified as: Two-place
Country Of Origin: Germany
Designer: Burkhart Grob
No. of Seats 2
No. Built 549
L/DMax: 35 105 kph /56 kt / 65 mph
MinSink: 0.75 m/s / 2.45 fps / 1.45 kt


Span Area Empty Weight Payload Gross Weight Wing Load Water Ballast
m ft sq.m sq.ft kg lb. kg lb. kg lb. kg
kg lb.
17.5 57.4 17.8 191.6 368 811 212 468 580 1279 32.58 6.67 0 0
Aspect ratio: 17.2
Airfoil: Eppler E 603
Structure: GFRP and CFRP

The G-103 A Twin II was the successor of the Twin Astir with a nose wheel and a fixed six-inch main gear fitted behind the center of gravity in a fairing. The main wheel is equipped with a hydraulic brake. Modified ailerons produce a substantially improved roll response. Approach control is by top surface Schemmpp-Hith type airbrakes. The Twin II won the world Out & Return record for two-seat sailplanes (1000.88 km/ 621.92 miles) flown by Tom Knauff of the U.S. The Twin II Acro is similar to the earlier model, but with strengthened mainspar caps and steel control pushrods which permit greater aerobatic performance. The Royal Air Force acquired 100 Acros (known as the Viking T. MK.1) for its air cadet training program. The G 103 has a FAA approved modification kit for all-hand control for handicapped operation. ATC.


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