The electro version of the Eagle F3B allows, in addition to other advantages of electromodels, the fast setup of the model, without the need of a winch to get into the air.

Description

With the electroversion you can do more starts with one battery charge, then you would using a winch in the same time. The drag of the propeller is so small, making the flight performance of the electroversion and the glider version nearly the same. The weight with a Li-Pol battery is about 300 grams more, then the basic flying weight of the glider. The electroversion is even lighter then a glider with additional ballast for the speed task. The setup and training for speed task was the main subject for the creation of the electro version.

Eagle x-tail as sailplane version is here...

Parameters

Category:	F3B,F3F with electric propulsion
Conception:	Two part wing, two part elevator, x-tail
Wing span:	3200 mm
Length:	1540 mm
Wing area:	63,88 dm2
Elevator area:	5,42 dm2
Wing airfoil:	HQ 1,6/7,5 mod
Elevator airfoil:	SD8025
Empty weight:	from 2350g
Flight weight:	cca 2770g
Ballast:	800g
Maximum servo width:	wing center: 13 mm (Futaba S3150 or Airtronics 94761Z) , wing tip: 10 mm (Futaba S3150), fuselage: 15 mm (Graupner 3871)
Construction:
Wing	carbon-rohacel-glass or carbon-rohacel-carbon
Spar	UMS Carbon
Tailplane	glass-balsa-glass
Fuselage	carbon-glass
Equipment and parameters:
Electro motor:	Kontronik Drive 600
Accumulator:	3200mAh 4S Li-pol
Flight Weight:	2770g
Current drain:	32-36 A
Run time motor:	180 - 300 sec.
Number of climbs:	8-10
Gear ratio:	6,7:1 part of the motor
Propeller:	Freudenthaler 17x10

Drawing

Measurement and altitude logs

With a current drain of 33A, the consumption is about 2700 mAh in 5 minutes. Achived height from particular climbes in total is cca 3000m (estimated) - record from altitude meter-loger Alti:

First climb	Following climb	Fast down flying	7th climb
	last, 13th climb	Total flight

Source Alti log file from flight

For view this file you need Alti software. It's download free here

Settings table for Eagle

Trim positions	Flaps	Ailreons	Elevator	Rudder
Normal	0	0	0	0
Termik	4	in line with flap	0	0
Speed	-1,5	in line with flap	1	0
Start	12	in line with flap	1	0
Butterfly	max down	5	5	0
Deflections	Flaps	Ailreons	Elevator	Rudder
Normal	30%/30% (% of ailreon)	7/3 (on tip)	12/10	8/8 (on tip)
Termic	0	6/3	12/10	8/8 (on tip)
Speed	50%/50% (% of ailreon)	10/7 (on tip)	12/6	0
Start	0	25/0 (on tip)	8/7	15/15
Butterfly	0	10/6 (on tip)	12/6	8/8
Towhook: 128 mm from end of cabin.
Center of gravity: from the leading edge 95 mm
up deflection/down deflection

Model and details

More photos Eagle x-tail as sailplane version