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NAME:
 
ALPHA 139
PRODUCER:
 
Axion RC
TYPE
  Foam (Flexipor)
WING SPAN:
 
1390 mm
LENGTH:
 
950 mm
WING AREA:
 
24 dm2
WEIGHT PER DM2
 
29 g/ dm2
WEIGHT (producer):
 
750 g
ACTUAL WEIGHT:
 
750 g
MOTOR:
 
unknown brushless inrunner
MOTOR DATA:
  brushless in-runner / 1900 rpm/volt  /  
approx. 65 g / 150 W / 22 A
PROPELLER:
  APC 6,0" x 4,5"
BEC / CONTROLLER:
 
unknown,  18 A
RECEIVER:
 
Futaba 2,4 GHz, 6 channel, 6006 HFC
BATTERY:
 
2s Lipo, Dualsky 2200 mA or Ray 2200
mA
CHANNELS:
 
5 (2x ailerons, 1x rudder, 1x elevator, 1x
motor)
SERVOS USED.
  All: unknown 8 g servos
RATING - BUILDING:
 
Beginner
RATING - FLYING:
 
Beginner - intermediate
A competition product to the well established Multiplex Easy Star:

Construction / tuning:

The colour scheme of this new plane immediately pleased my eye when
I spotted it in one of the Hungarian model shops.

In addition the plane came with all RC equipment (except receiver)
pre-installed, boosted an installed brushless in-runner motor, ailerons
and all servos. Even the stickers were already fixed!

After opening the box, all parts were nicely wrapped in foil and fixed in a
foam mould. All servos were properly glued in place, the rudders
attached as elastic flaps and all servo-rudder connections made. A
strong CFK rod was provided to connect the wing halves.

The only tuning I made from the beginning was to fix a proper APC
propeller - versus the provided prop - which looked more like a rubber
motor propeller.

Within 10 minutes the plane was assembled! Only one thing had to be
glued: the elevator and rudder - with the provided 5-min epoxy glue this
was done in no time.

After installation of the receiver, the rudders were checked and the
transmitter programmed. I did programme butterfly, but it is not needed
as you may see in the video - the plane can be flown very slow - without
stall tendency.

The only negative point - the very nice 4-colour manual did not provide
the CG point! So for the first flight I assumed 35 % from the depth of th
wing measured where it inserts into the fuselage.

Actually this plane looks very similar to the Easy Star (Multiplex) - the
foam quality is equal and the fuselage is even re-enforced with a CFK
rod to provide more stability.

Ready, lets take this new Alpha for a spin!
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Flight Experience:

Same day when I finished the plane I took it to the field to try it out!

Rudder check, range check, motor check - one last check of the CG -
and off it went!

Straight the plane pulled away with a tendency to go up too much. A few
clicks down and it was perfect! Now the usual tests followed... dive -
yep, the CG was ok, speed - plane would need a bit of down
programmed at full speed, roles - do not come well as the ailerons are
rather small, looks - ok, upside down flight - ok, quite some down
rudder needed to keep the plane level. Stall test - what stall? This is
unknown to the plane - it just puts down the nose and picks up speed.

Overall very gentle handling - perfect for beginners!

Next came the extreme low flying - and that was the real forte of this
plane and actually why I bought it - to provide some nice inflight videos
filmed from very low level flying! See for yourself in the video provided
below.

Preparation for video-flights:

The fixing of the flycamone V2 eco on top of the fuselage was a matter of
seconds. It was fixed with a strip of double tape. For security reasons a
rubber band ensures that it wont fly away in any case!
Other videos you will find here!
Sample video from the producer....