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Jun 02, 2019, 12:59 AM
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WLtoys F959 CG games

Plan was to CG all 3 new planes starting with the F959 .

Unfortunately just after I was done with the F959 , there is a rain front moving in .


I was expecting all sorts of nasty things , but to my surprise the F959 flies like a bird .
There is one thing it wont do = Turn !
At the very slow chucking speed for CG testing , the rudder and elevator were super soft to non existent .
I did apply just the smallest amount of throttle , maybe 10% .
And the F959 actually flew in a straight line with so little power and maintained altitude . But that soft elevator rudder !
Obviously to get more authority , more speed is needed .
Now , how slow was I flying ? A fast human could easily outrun the F959 .. ( So slow )

Obviously with the F959 so soft on the controls I had to move the battery further back ..
To cut a long story short , I moved the battery almost all the way out from the space where it is supposed to go ..
And it was still soft on the controls , exhibiting no instability what so ever .

I dont know that I have ever come across a model with such a wide CG range .
But it did turn better for moving the battery at such slow speed .
I am going to have to velcro the battery so I can move it further back ..

Hmmmm , at 111 grams flying weight .. And the CG being able to be moved back ..
I wonder if I can pull 12 grams out of the nose ? and make the 959 a true sub 100 gram model !

I really wanted to CG the Ezio and Firstar today as well .. But I dont want to be caught in the rain .. So another time !
Last edited by old4570; Jun 02, 2019 at 01:22 AM.
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