Some renders show this model in another colourway.

Pylon racer RC plane

A 716 mm low-wing pylon racer in foaming PLA for a 2306 quad motor on 4S.

Span x length: 716 x 542 mm
Wing area: 8.02 dm²
Print time: 15.1 h on 14 plates
Filament: 125.9 g

Colourway

PLA Aero black main
Red second
Jade white accent

About the design

A small, very fast pylon racer of my own design, modelled in Blender. A long pointed spinner sits flush with the cowl, a low bubble canopy fairs into the turtledeck, and the tapered wing with raked tips joins the slim fuselage through smooth root fillets. The airframe prints in Bambu PLA Aero, a PLA that foams as it prints and weighs about half as much. The wing panels and the stabiliser print in spiral vase mode. It flies on a 2306 quad motor, a 40 A ESC and a 4S pack, with three nano servos. Not a plane for a first flight.

What you can change

Motor and prop
Battery, which the balance places
ESC, receiver and servos
The static margin the balance aims for

Specifications

Span x length: 716 x 542 mm
Wing area: 8.02 dm²
Aspect ratio: 6.39
Mass ready to fly (g), my estimate: 346
Wing loading: 43.1 g/dm²
Balance (mm behind the leading edge at the panels' root joint): 63.2
Balance (% of the mean chord): 30.9
Static margin: 0.08 my estimate
Tail volumes, horizontal and vertical: 0.36 and 0.022
Power: EMAX ECO II 2306 2400 kV, 4.7 x 4.7 prop, GNB 4S 850 mAh 80C
No-load pitch speed (km/h), an upper bound: 254

Printing

Plates, print hours and filament grams for each Bambu Studio project
Project	Plates	Hours	Grams
Wings, vase mode, PLA Aero	6	8.8	41.0
Fuselage, PLA Aero	1	3.5	40.6
Surfaces, vase mode, PLA Basic	5	1.4	21.6
Parts, PLA Basic	2	1.4	22.7
Total	14	15.1	125.9

Times and weights come from the Bambu Studio 02.08.02.61 slice at 0.20 mm layers. Each figure is rounded on its own.

In the room

Some renders show this model in another colourway.

Credits and licence

The layout follows "Madame Jeanette" by Ladru (Bas Ladru) (https://www.thingiverse.com/thing:4904440), licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Kept from it: a pylon racer of about 720 mm span with a tapered wing, ailerons and an elevator on three nano servos, a 5 x 3 mm carbon spar, a 2306-class motor with a 4.7 x 4.7 prop on 4S, and an airframe printed in foaming PLA. The airframe is my own design, and no geometry of the author's is used.

The wing's sections are Martin Hepperle's MH 32 and MH 30, with coordinates from airfoiltools.com.