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Skype: honzaaxi WINNING SETUP OF AXI AND JETI COMPETITION FOR APRIL 2007
Prize choosen by winner of 
and 
competition is motor AXI 2826/12 GOLD LINE and controller JETI Advance 40
opto plus.
Name:Tim Trick
Address: Hoedekenskerke, Netherlands
Model: Ben Buckle Falcon
Motor: AXI 2826/12 GOLD LINE
Prop: APC 14x 7 electric
ECS: Jeti Adv 40 opto
Lipol: 8 x Puffin Hi-Flow 3500 NIMH
Weight: 2.6 kg
Wingspan: 240 cm
Description:
The Falcon was originally designed in 1937 as free flight model and was
named the Cloud Cruiser. Power was by a spark ignition engine. The design
was modified in 1946 and renamed the Falcon, still a free flight model.
My version is based on plans from Ben Buckle and is of the 1946 version. The
plan is intended for a two stroke of approx 6 cc or a 4 stroke of approx 10
cc and flying weight of around 5 kg.
I intended from the beginning to make an electric version and made some
major changes to the airframe to reduce the overall weight during building.
The wing and front fuselage was significantly redesigned, whilst still
retaining the original Falcon shape. I had originally planned on using an
AXI 4130/16 on 16 3500NIMH cells turning an APC E 16x8 prop. This setup was
based on the engine power required to fly the 4 stroke design.
During the fuselage construction, I discovered that all the weight saving
that had taken place would cause the plane to be nose heavy with this motor,
so looking at the new projected weight, I decided on an 8 NIMH cell setup
and an AXI motor that was capable of turning an APC E 14 x 7 prop at least
5500 rpm for efficient slow speed flight. The 2826/10 and 2826/12 motors
that I had available fitted perfectly and produced approx 5700 to 6000 rpm.
Flight times so far have been around the 20-25 minutes gentle flying as is
typical for this type of model. Current draw is quite low and during
cruise, I have estimated that the motor is only pulling 6-8 amps.
The total build time was 6 months, the plane being totally scratch built.
Covering is Solartex vintage iron-on fabric and the flight ready weight is
2.6 kg - almost half of what resulted for a combustion engine version!
For this type of slow flying vintage aircraft, the medium sized Axi motors
are ideally suited and remove the need for a complex an expensive gearbox or
belt drive system (which also requires additional space). When you look at
the overall size of the Falcon (2.5 m wing span, 1.5 m long, 2.kg weight) it
is surprising that so much power comes form such a small dimensioned motor.
For your information, I had documented the build on the EZone forum and the
thread can be found here:
http://www.rcgroups.com/forums/showthread.php?t=419079
Pictures:
AXI COMPETITION
Winner for July 2010
Leonhard Grugl
Prize: AXI GOLD LINE
Next winner of AXI & JETI will be choosen in September 2010.
Winner of AXI worth 1000EUR for 2009/2010 will be choosen after MODEL HOBBY 2010