Free plans for SZD-55 - Nexus 900

SZD-55 rc GLIDER, also named Nexus 900 sailplane in rc world: original design by Franck Aguerre!

• ROTOWING system with very easy commands setup (2 micro servo and you fly!)
• TOTAL WEIGHT: 150gr~
• WINGSPAN: 93cm
• AIRFOIL: fad05cnc (credits to Franck Aguerre)
• FLY DIFFICULT: medium (not for beginners), but fun guaranteed!
• TOTAL PRINTING TIME: 15/20 hours
• Ready to fly in 2-3 hours of works/settings.

Now print and fly!

Material needed

• 1 x wing joiner: best choice: 3mm carbon rod — 50cm length; alternative: any rod of 3mm, carbon or steel, from 20cm to 50cm;
• 4 x wing/servo commands rod: 0.8/1mm steel: 5cm; (umbrella rod?)
• 1 x shaft for fix commands to fuselage: 2mm steel: 5cm; (bicycle spokes is 2mm)
• 2 x 3.7gr servo (any light micro servo);
• 1 x 1s lipo 380mAh (any battery 10/20gr);
• your RX (2 channels);

Superglue (cyanoacrylate) and optional double-sided tape. (also epoxy is ok, but more complex in my opinion)

Electronics:

3.7g Micro Analog Servo
Buy: BangGood, AliExpress Power HD-1370A 0.6KG 3.7g
Buy: BangGood, AliExpress 3.7G Micro Light Servo
Buy: BangGood, AliExpress RC Quadcopter Spare Parts
Buy: BangGood, AliExpress Gens Tattu 3.7v 380mAh
Buy: BangGood, AliExpress

3D printing settings:

Fuselage: (3 parts — 60gr~ total weight — vertical print)

• tail: 12gr — solid infill every 25 layer (5mm), 0% internal infill, 1 perimeter, 3 top, 3 bottom.
• center: 10 gr — solid infill 4% (one X cross), 1 perimeter, 3 top, 3 bottom.
• head: 40gr — solid infill ~10%, 1 perimeter, 3 top, 3 bottom. Supports on servo housing and wings commands rod (not on wing joiner hole and battery top hole, if possible).

Wings: (3 parts — 60gr~ total weight — vertical print)

• 30gr/35gr each wing, 3% infill and solid infill every 25 layer (5mm). You need to mirror flip the wing parts for left/right wing.

Canoppy: (<10gr — vertical print )

• 0-3% internal infill, 1 perimeter, 3 top and 3 bottom (sand for correct positioning), maybe support.

Commands:

• strong print: 3+ perimeter, 50%+ infill. 3+ top/bottom. Mirror flip for left/right command.