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$75.00 Build Contest: Arado 555

Old 03-23-2014, 05:44 PM
  #51  
pmullen503
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Having CNC cut wing cores would make things go together quickly. I've been thinking about doing one about 50% larger with retracts and EDF's and having the cores CNC cut for me.
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Old 03-23-2014, 08:10 PM
  #52  
quorneng
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Well done!
An interesting subject.
A belly take off with a 'wing' is quite an achievement.
I have found that the nose down on launch from a high mounted prop is not solely due to aerodynamics but also the inertia effects under acceleration from the low mounted battery.
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Old 03-23-2014, 10:34 PM
  #53  
pmullen503
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Originally Posted by quorneng View Post
Well done!
An interesting subject.
A belly take off with a 'wing' is quite an achievement.
I think the gull wing has a lot to do with it. There's actually quite a bit of clearance when it's on the ground.

Originally Posted by quorneng View Post
I have found that the nose down on launch from a high mounted prop is not solely due to aerodynamics but also the inertia effects under acceleration from the low mounted battery.
Some of the nose down on the maiden launch may have just been poor trim. Now that I've got several flights on her I notice with the elevator trimmed to fly level, it's up a few degrees. So the maiden launch was nose heavy and probably had some down trim as well. I'll try hand launching again with the proper CG and trim.
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