Free plans for Extra 300

These files for this Extra 300 — 3D Printable are free to use for private individuals and for personal use. The model is designed to print in a regular desktop 3D printer.

See also: Working instructions Extra 300 – 3D Printable

Wingspan: 1300 mm
Length: 1250 mm
Weight empty: 1450 g (PLA)
Weight ready to fly (Depending on your equipment): 2550 g
Wing area: 29.6 dm2

Motor: Hacker 50

Engine: 345 grams
Battery: LiPo 3700mAh  6S 600 grams
Servo 5 pieces: 5 x 20 = 100 grams
ESC: 90 grams

Possible electronics:

iFlight Tachyon T4214 X-Class
Buy: BangGood, AliExpressHobbywing Skywalker 2-6S 80A
Buy: BangGood, AliExpressFlight Model 16x6 1660
Buy: BangGood, AliExpressCYS-S8213 20g High Torgue
Buy: BangGood, AliExpressZOP Power 22.2V 4000mAh
Buy: BangGood, AliExpress

Centre of Gravity: 90 mm to 105 mm from wing front edge.
For pushrod you can use carbon fiber rod 2/1 mm and music wire 1mm.

STL files includes in this download for a complete RC-plane. Printer settings depend on the printer. The settings I use may need to be adjusted to your requirements. Here Simplify 3D as slicers is used.
These settings apply with some exceptions. Cowl uses 2 Outline/Perimeter. Landing Gear uses 4 Outline/Perimeter and 50% infill. Motor Mount1 uses 2 Outline/Perimeter and 70% infill, Motor Mount2 uses 2 Outline/Perimeter and 25% infill. Rudder-horn and Wing-lock pc, Servo-box uses 2 Outline/Perimeter and 100% infill.