Wilga 2000 from Hobby King

10 Jun 13 - Maiden flight completed    .

Wilga 2000 on floats - 3/4 view Wilga 2000 on floats - side view Wilga 2000 on floats - front view Wilga 2000 on wheels - 3/4 view Wilga 2000 on wheels - side view Wilga 2000 on wheels - front view

N of launches / Time 1 0 hrs 4 mins
Wingspan 45.7 in. 1160 mm
Wing Area 261 in 16.8 dm
Flying Weight Floats 1 lb 6.3 oz 631 g
Wheels 1 lb 3.8 oz 562 g
Wing Loading Floats 12.3 oz/ft 37.5 g/dm
Wheels 10.9 oz/ft 33.4 g/dm
Wing Cube Loading Floats 9.1 - 'Aerobatic'
Wheels 8.1 - Between 'Trainer' and 'Aerobatic'
Motors Pre-installed brushless outrunner
Propellers Supplied 3-blade 8" x 6"
Speed Controller Pre-installed 18A Brushless - BEC
Motor Batteries 2S Turnigy 1300mAh LiPo - has flown on 3S Zippy 1300mAy LiPo
Receiver OrangeRx R615 Spektrum DSM2 6Ch 2.4Ghz  - 6ch - 2.4 GHz - Spektrum DSM2 compatible
Servos Ailerons 2 x Pre-installed 8g
Elevator Pre-installed 8g
Rudder Pre-installed 8g
Static motor parameters On a 2S Turnigy 1300mAh pack the motor did 6020 RPM on 7.74V, drawing 9.5A  = 73.5W or 53 W/lb with floats and 59 W/lb on floats.

On a 3S Zippy 1300mAh pack the motor did 7175 RPM on 10.28V, drawing 13.1A  = 135W or 94 W/lb with floats and 105 W/lb on floats (not surprising it didn't struggle)

Flight performance Only flown one-flight so far and that was on floats.  It flies very well but I need to fly it more to check it out properly

11 Jun 13 - I realised earlier that Hobby King say to use a 2S 1300mAh pack and I'd been using a 3S 1300mAh pack.  It seemed to fly fine and there were no signs of any problems during the 4 minute flight using a 3S pack.  I therefore decided to measure the static data with both 2S and 3S packs just so I've got the data.  Having reviewed the figures 135W is asking an awful lot from such a small motor so I'll see how it flies on 2S next time.  The 3S pack weighs 23g (0.8 oz) heavier than the 2S pack; a weight gain of 3.5% when using floats for a 83% increase in power

10 Jun 13 - I decided at 9pm last night to assemble the Wilga 2000 so I could fly it today.  I had finished well before midnight and that included time to make a short servo extension lead for the ailerons and change the ESC connectors.  I have only completed one flight as it started spitting with rain but the Wilga 2000 was easy to handle on the water and handle take-offs and landings (several) with ease.  The first attempted touch & go became a landing as the Wilga stopped very rapidly due to the light weight and water drag.  I kept a little power on for the second attempt and a nice touch & go resulted.

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