Grob 103 Twin Astir, 8485W, 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.

For 85W document and equipment data, including LX S80/S80D information: Scroll to the bottom of the page.


For new users of the LX S80, download and read the suggestions of the following:
 document: Getting Started With The LX S80
Weight and Balance
Empty Weight 939 lbs.
Maximum Weight 1435 lbs.
Maximum Useful Load 496 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.
Seat ballast must be installed if front seat load is less than 154 lbs.
Air Speeds
Maximum Speed calm air Vne 155 MPH
Maximum Speed to Deploy Spoilers V 155 MPH
Maneuvering Speed Va 105 MPH
Maximum Aerotow Speed Vt 105 MPH
Minimum recommended approach speed Vref 65 MPH
Maximum crosswind component V 12 MPH
Stall Speeds Without Dive Brakes With Divebrakes
Solo 41 MPH 47 MPH
Dual 50 MPH 56 MPH
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 46 MPH 56 MPH
Best L/D ~36/1 58 MPH 69 MPH

Glider N8485W Documents

Twin Astir Checklist
N8485W Loading Graph
N8485W Weight and Balance

Glider Manuals

Twin Astir Flight Manual
Twin Astir Maintenance Manual
Twin II Repair Instructions (NOT specifically for Twin Astir)
TOST Aircraft Wheels Manual
2014 TDSC G39EU

Equipment Manuals

TX720 installation Manual
Winter STV-5 Variometer Installation Manual
Power FLARM Butterfly Display Manual
Power FLARM Core Manual
LX S80 User Manual
LX S80 Quick Start Manual