Weight and balance
Glasair Super II RG W/Extended Tips N61CY
I wrote a stand alone Visual Basic program to solve weight a balance problems for the Glasair family of aircraft. It also be found at the Glasair.org site.
Or a web based program Weight and Balance Calculator *12/30/03 added the ability to enter data for your own aircraft, unfortunately you will need to enter the data each time you reload the page. Working on a cookie that will save your airplanes data.
| Max gross weight | Normal | 2100 pounds | |
| With wing tip extensions | 2200 pounds | ||
| Aerobatic | 1900 pounds | ||
| Mean aerodynamic chord (MAC) | Normal Wing | 44.5 inches | |
| With wing tip extensions | 43.0 inches | ||
| Flight center of gravity limits | Forward | 13.5% MAC | |
| Aft | 31.5% MAC |
Various Moment Arms
| Oil | Station 44.00 | Pilot/Passenger | Station 115.50 | |
| Fuel main tank | Station 89.85 | Instrument Panel | Station 89.00 | |
| Fuel header tank | Station 68.00 | Nose wheel axle | Station 43.00 | |
| Fuel wing tip tanks | Station 98.69 | Main gear axles | Station 105.25 | |
| Firewall | Station 60.00 | Wing tip extensions | Station 100.62 | |
| Baggage | Station 136.00 |
Center of Gravity check of an example Glasair Super II RG
Forward Limit. Worst case full fuel, no baggage and a light pilot.
| Item | Weight | Station | Moment |
| Empty Airplane | 1313 | 89.94 | 118086.5 |
| Pilot | 110 | 115.5 | 12705.0 |
| Fuel header tank | 48 | 68.00 | 3264.0 |
| Fuel main tank | 240 | 89.85 | 21564.0 |
Weight= 1711 pounds, Moment= 155619.5 CG= Station 90.95 or 16.29% MAC
AFT Limit. Worst case full baggage compartment, pilot and passenger, and no fuel. The CG maybe the least of your concerns in this case without fuel, but as fuel is used CG does moves aft.
| Item | Weight | Station | Moment |
| Empty Airplane | 1313 | 89.94 | 118086.5 |
| Pilot and Passenger | 340 | 115.5 | 12705.0 |
| Baggage | 100 | 136.00 | 13600.0 |
Weight= 1753 pounds, Moment= 170956.5 CG= Station 97.52 or 31.06% MAC