Grob 103 Twin II Acro, N54554, Performance Summary

The data on this page are gathered from the factory published owners manual and are deemed to be correct.
However, it is the pilots sole responsibility to verify and fly the a/c within the limits of factory published information.

Weight and Balance
Empty Weight	910 lbs.
Maximum Weight	1279 lbs.
Maximum Useful Load	369 lbs.
Minimum front seat load for all flights*	154* lbs.
Maximum Front Seat Load	242 lbs.
Maximum Rear Seat Load	242 lbs.
Maximum Bagage Compartment Load	22 lbs.

Trim Weights must be installed if front seat load is less than 154 lbs.

Front Seat Pilot Weight	121-137 lbs	138-153 lbs
Number of Trim Weights	2	1

Air Speeds
Maximum Speed calm air	Vne	135 Kts
Maximum Speed to Deploy Spoilers	V	135 Kts
Maneuvering Speed	Va	92 Kts
Maximum Aerotow Speed	Vt	92 Kts
Minimum recommended approach speed	Vref	51 Kts
Maximum crosswind component	V	11 Kts
Stall Speeds	Without Dive Brakes	With Divebrakes
Solo	36 Kts	40 Kts
Dual	40 Kts	46 Kts

Flying in rain raises stall speeds by 6 Kts. With wet wings increase take-off and approach speeds accordingly.
True airspeed is greater than indicated at altitude. Vne decreases according to the following table.

Vne
Altitude	0-10,000'	13,000'	16,000'	19,000'
Vne	135 Kts	121 Kts	115 Kts	109 Kts

Performance
Speeds to Fly	Solo	Dual
Minimum Sink	43 Kts	46 Kts
Best L/D ~36/1	51 Kts	57 Kts