Data(very rough numbers)

XPS foam density (fuselage) - 28 to 45 Kg/m3 (lets say 35)

thrust (expected) - 800 to 1200g

electronics weight - about 250g

• 70g motor
• 100g batteries
• 50g servos
• 30g everything else (wires, boards)

estimated from the design files:

• empty fuselage weight - 500g
• main wing area - 0.21 m2
• rear wing area - 0.04 m2
• bottom area - 0.04m2
• total lifting area - 0.29m2

Design targets

• wing loading - 1500g/m2
• weight - 800 to 1000g

we're ate:

• 250g max payload which is OK
• 2760 to 3500 g/m2 wing load which needs addressing
• 0.8 to 1.2 TWR which is so-so