1. a href=../albatross>Albatross can go 4 hours with big wheels causing drag
2. 10 hours flight on 2.4 meter foam rc airplane - batteries hanging out bottom of plane in wind - extra drag
3. Amprius batteries - about 50% more watt-hours per kg
4. camera inside - so no extra drag
5. AI to transmit short messages giving useful info about type of ships seen
6. catapult launch so can takeoff fully loaded
7. There is a rule of thumb: Glide Ratio = Wingspan (meters) x 10, so:
   1. A 2m glider around 20:1
   2. A 3m glider around 30:1
   3. A 4m glider around 40:1
   4. A 6m glider around 60:1