1) The document discusses the design and 3D printing of a drone with a low-end 3D printer. Key parts like servo bays, hinges, and spar channels can be printed-in, reducing labor. 2) However, 3D printing also has disadvantages like long print times and reliability issues with low-end printers. Parts also tend to be heavier than those made of wood. 3) The 3D printer works by laying down a thin bead of melted plastic to build up the drone part in layers, but the technology is still promising if more accurate, reliable printers and lighter materials can be developed.

1. UAVs&and&Addi2ve&Manufacturing&
Making&a&drone&with&a&lowOend&3D&printer&
Growndrones.com&
&

2. The&Printer&

3. The&Design&
• 1m&span,&wing&area&=&1240&cm2&&
• Ellip2cal&planform,&blended&airfoil&
– Selig&S4022&root,&Wortmann&FX60126&2p&

4. Advantages&of&3D&Prin2ng&
• PrintedOin:&
– Servo&bays&
– Hinges&
– Spar&channels&
– Wiring&conduits&
• Nearly&zero&labor!&

5. Disadvantages&
• Long&print&2mes&
• Current&lowOend&printers&not&completely&
reliable&
• Weight&–&hard&to&make&parts&as&light&as&wood&
– GDO1&wing&loading:&6.4&kg/m2&or&21&oz/i2&

6. How&does&it&work?&
• CNC&Extruder&lays&down&a&‘bead’&of&melted&
plas2c,&0.2mm&wide&
& 2&“shells”&
Honeycomb&“fill”&(10%)&
Spar&tube&

7. Conclusion&
• Very&promising&but:&
– Need&a&more&accurate&&&reliable&machine&
– Need&*much*&bigger&build&volume&
– Need&lighter&and&stronger&materials&