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Old 09-22-2009 | 01:44 AM
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tIANci
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From: Kuala Lumpur, MALAYSIA
Default RE: Sebart Wind 110

Finally, got to maiden her today and put in 2 short flights to trim her out. She 'feels' heavy with the 10S 4,900 mAh batteries in place. Powering her up I got about 53A and 2,100W with the Scorpion 4035-250 turning a XOAR 17x10.

There was about a 5 knot wind so I did my best to trim her and get the CG right. Took off with a CG of about 190mm. With my RX/RX lipo/regulator in the turtle deck I am able to keep the packs 0.75" in front of the rudder servo tray. That means I have some space to move the CG further back if necessary.

Throws were set as follows:

AIL - 30mm (high) 15mm (low), this is measured on the inboard side of the aileron
ELE - 25mm (high) 15mm (low), this is measured on the outboard side of the elevator
RUD - 30* (high) 15* (low)

A couple of clicks on the aileron and elevator and she was flying level. My first impression of her is that this plane is very stable and flies light. She goes where you point her. Once the initial trims were done I flew a few circuits and then went inverted, she only needed a touch of down elevator to keep her level. After that I executed some rolls and loops. Rolls are pretty axial and I think she may not need any differential. Loops were not tracking too straight but that may be either me or the elevator halves are not having equal throws. More work on that front. Was too nervous to ensure that the rudder is straight.

Flying her on low rates was just right, the ailerons/elevator/rudder were responsive. However, she will not execute a stall turn well on low rates unless you bleep the throttle hard, high rates are required. With the standard horn even with my high rates I had problems with snaps. I can hardly see the tail throw over. Guess, I need to get the rudder up to 45* of deflection.

KE had minimal coupling on the ailerons, perhaps I will need about 2%-3% mix but the elevator coupling was relatively more noticeable. On the first flight it was minimal when KE from the RIGHT (left rudder input) but on a left KE (right rudder input) she was tucking to the belly a little. On the second flight I shifted the CG a bit and that caused a more pronounced elevator coupling. Guess, I need to set my CG right first before I can say more.

Power was just right, it does not give unlimited verticals but uplines are strong and I am able to pull very big loops with ease. I think an 18x10 XOAR she will do a better job. I did try to prop hang her, she seems easy to prop hang, heheehehee ... will try it again another day.

The WindS can fly pretty slow, I am most surprised. But at those low speeds the wings want to rock a bit. Approaching stall perhaps? Landings are super nice, rate of descent is low and so is the airspeed. I estimate it to as low as around 25 mph, much slower than some of the YouTube videos I have seen of the WindS landing.

I can't imagine how nice the WindS 2M plane will be ... hope the when Huison gets his he will be nice enough to let me fly it! I am not going to be a serious pattern flyer so the 2M version is out of the question.
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