Micro Flyer 2 EPP
Name: Micro Flyer 2 EPP
Date: July 2016
Material: 5mm EPP Foam
Wingspan: 600 mm
Airfoil: Flat plate / NACA 0012
Root chord: 160 mm
Tip chord: 145 mm (including elevons)
Sweep: 23 degrees (designed as 25 degrees)
Wing Area: 91,500 mm^2
Winglet: 110mm (base) x 60mm (height) triangle
Motor: Hobby King HK2310-2250kv brushless + HK blue 10A ESC
Propeller: 6 x 3
Battery: Turnigy NanoTech 2S 370 mAh 25-40 C LiPo (27 g)
Servos: 2 HK-5320 (1.7g)
GWS V-tail mixer: No programable radio required for elevon mixing
AUW: 120g (with 2s-370mAh lipo)
NP: 93 mm from LE
Design and Build:
I built this micro flying wing with my two cousins in 4 hours from start to finish. The wings are cut from 5mm EPP, and Gorilla-glued together. 1mmx3mm carbon spars are taped along the LE and another is glued into a slot cut under the wing at 1/4-chord (wing spar). The wing was then wrapped in clear packing tape to prevent EPP from ripping.
The elevons are cut from 2mm balsa, and also covered with clear packing tape. They are hinged at the top to the wing TE.
The motor mount is two triangles of white foam gorilla-glued at the TE, and a 2mm plywood square glued perpendicular to the wing. The motor is screwed onto the plywood square.
The servo pushrods are fixed (non-adjustable) and the servos are hot-glued onto the wing.
Date: July 2016
Material: 5mm EPP Foam
Wingspan: 600 mm
Airfoil: Flat plate / NACA 0012
Root chord: 160 mm
Tip chord: 145 mm (including elevons)
Sweep: 23 degrees (designed as 25 degrees)
Wing Area: 91,500 mm^2
Winglet: 110mm (base) x 60mm (height) triangle
Motor: Hobby King HK2310-2250kv brushless + HK blue 10A ESC
Propeller: 6 x 3
Battery: Turnigy NanoTech 2S 370 mAh 25-40 C LiPo (27 g)
Servos: 2 HK-5320 (1.7g)
GWS V-tail mixer: No programable radio required for elevon mixing
AUW: 120g (with 2s-370mAh lipo)
NP: 93 mm from LE
Design and Build:
I built this micro flying wing with my two cousins in 4 hours from start to finish. The wings are cut from 5mm EPP, and Gorilla-glued together. 1mmx3mm carbon spars are taped along the LE and another is glued into a slot cut under the wing at 1/4-chord (wing spar). The wing was then wrapped in clear packing tape to prevent EPP from ripping.
The elevons are cut from 2mm balsa, and also covered with clear packing tape. They are hinged at the top to the wing TE.
The motor mount is two triangles of white foam gorilla-glued at the TE, and a 2mm plywood square glued perpendicular to the wing. The motor is screwed onto the plywood square.
The servo pushrods are fixed (non-adjustable) and the servos are hot-glued onto the wing.
Flying with different batteries:
* DO NOT use 3-cell Lipos * (The motor can only handle 2-cell max)
Plane's empty weight is 93g (without battery) . Neutral Point (NP) is 93mm from LE and each configuration below places the CG just in front of the NP. Each configuration has an AUW of approx 150g.
Configuration 1: 2s 370mAh (26g) with 28g lead weight = 147g All Up Weight (AUW)
Configuration 2: 2s 850mAh (48g) with 14g lead weight = 155g AUW
Configuration 3: 2s 1000mAh (57g) with No lead weight = 150g AUW
Other 2-cell batteries can be used with this airplane, since the lead weights are attached to the plane via Velcro. Make sure the total weight of the battery + weights is appox 57g or AUW of the airplane is approx 150g. This is important for the plane to fly well and stable. If the CG is behind the NP, the plane will be unstable!
* DO NOT use 3-cell Lipos * (The motor can only handle 2-cell max)
Plane's empty weight is 93g (without battery) . Neutral Point (NP) is 93mm from LE and each configuration below places the CG just in front of the NP. Each configuration has an AUW of approx 150g.
Configuration 1: 2s 370mAh (26g) with 28g lead weight = 147g All Up Weight (AUW)
Configuration 2: 2s 850mAh (48g) with 14g lead weight = 155g AUW
Configuration 3: 2s 1000mAh (57g) with No lead weight = 150g AUW
Other 2-cell batteries can be used with this airplane, since the lead weights are attached to the plane via Velcro. Make sure the total weight of the battery + weights is appox 57g or AUW of the airplane is approx 150g. This is important for the plane to fly well and stable. If the CG is behind the NP, the plane will be unstable!
Propeller:
6x3 is the best propeller for this motor. 6x5 prop was tested, but puts too much load on the motor and no performance increase was noticed.
The propeller is attached to motor with a good-old Prop Saver. It's excellent for flying wing belly landings. See video below for how to change the propeller in under 1 minute (need a small screwdriver). Some hard landings will bend the propeller - just bend the prop back, but unfortunately bending the prop back and forth will eventually cause it to break. Change the propeller if it becomes damaged beyond repair.
6x3 is the best propeller for this motor. 6x5 prop was tested, but puts too much load on the motor and no performance increase was noticed.
The propeller is attached to motor with a good-old Prop Saver. It's excellent for flying wing belly landings. See video below for how to change the propeller in under 1 minute (need a small screwdriver). Some hard landings will bend the propeller - just bend the prop back, but unfortunately bending the prop back and forth will eventually cause it to break. Change the propeller if it becomes damaged beyond repair.
Flight Time: * 2min 30 sec *
Do not fly longer since battery will be permanently damaged
Trim Control Surfaces:
Elevon control surfaces should both be deflected the same amount (look from behind the plane). The trim is very small up elevator (about 5 degrees)
Do not fly longer since battery will be permanently damaged
Trim Control Surfaces:
Elevon control surfaces should both be deflected the same amount (look from behind the plane). The trim is very small up elevator (about 5 degrees)
The plane is a gift for my favourite cousins - Enjoy guys!