Grob 103 Twin Astir, N7813, Performance Summary and User Documents

The data on this page is gathered from the factory published owners manual and are deemed to be correct.
However, it is the pilot’s sole responsibility to verify and fly the a/c within the limits of factory-published information.
For 7813 document and equipment data, including SN10 information: Scroll to the bottom of the page.

For new users of the SN10, download and read the suggestions of the following document: Getting Started With The SN10

Weight and Balance
Empty Weight	958 lbs.
Maximum Weight	1435 lbs.
Maximum Useful Load	477 lbs.
Minimum front seat load for all flights*	154* lbs.
Maximum Front Seat Load	242 lbs.
Maximum Rear Seat Load	242 lbs.
Maximum Baggage Compartment Load	22 lbs.

Seat ballast must be installed if the front seat load is less than 154 lbs.

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	56 kts
Maximum crosswind component	V	11 kts
Stall Speeds	Without Dive Brakes	With Divebrakes
Solo	36 kts	41 kts
Dual	41 kts	49 kts

Flying in rain raises stall speeds by 7 MPH. With wet wings increase take-off and approach speeds accordingly.

Performance
Speeds to Fly	Solo	Dual
Minimum Sink	40 kts	49 kts
Best L/D ~36/1	51 kts	60 kts

Glider N7813 Documents

Twin Astir Checklist
SN10 Quick Reference
N7813 Loading Graph
N7813 Weight and Balance

Grob 103 Twin Astir, N7813, Performance Summary and User Documents

Glider N7813 Documents

Glider Manuals

Equipment Manuals

Resources

N7813 Misc Information