Christopher14
Driftin' with the wind...
Would you mind putting up a side profile shot of the wing so we can see the shape of the airfoil when you are done with one side?
nnDLG
- Thread starter nerdnic
- Start date
Christopher14
Driftin' with the wind...
Thanks, it will be instrumental in everyone's building efforts.
Cross section of airfoil
90g weight so far
I have some initial concerns about wing strength so far but I think the wing style I chose is to blame. The wing is sturdy as you move from the center toward the wing tip until you get to the slope in the leading edge where the top and bottom wing seperate in the plans. I will be changing the leading edge to be straight. Also, after removing nearly all the inside paper and beveling all surfaces the foam is left with no strength. What little stiffness DTFB has is lost once you remove paper and cut away massive amounts of the foam.
Something that I've never had to deal with on a plane before also came up - wing balance. Somehow I came out way off on the weight between the two wings.
From a weight perspective I have no idea if 90g is good or not but it feels like nothing in your hands. I have decided I will be adding ail. The nose I designed was too small to fit servos so I need to enlarge it a smidge.
90g weight so far
I have some initial concerns about wing strength so far but I think the wing style I chose is to blame. The wing is sturdy as you move from the center toward the wing tip until you get to the slope in the leading edge where the top and bottom wing seperate in the plans. I will be changing the leading edge to be straight. Also, after removing nearly all the inside paper and beveling all surfaces the foam is left with no strength. What little stiffness DTFB has is lost once you remove paper and cut away massive amounts of the foam.
Something that I've never had to deal with on a plane before also came up - wing balance. Somehow I came out way off on the weight between the two wings.
From a weight perspective I have no idea if 90g is good or not but it feels like nothing in your hands. I have decided I will be adding ail. The nose I designed was too small to fit servos so I need to enlarge it a smidge.
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jayz 84
Posted a thousand or more times
Very late nights man.. laaate nights alls i can say is he better get it all in before baby number 2 gets here haha
jayz 84
Posted a thousand or more times
https://www.google.com/url?sa=t&sou...ppC2RNnwKXheC5JcQ&sig2=ghC5_s660a7iQPqZAR5pow
You need to make the wings strong so i can laugh at you tring to perform this throw
You need to make the wings strong so i can laugh at you tring to perform this throw
How did you shape the airfoil - hot wire?
jayz 84
Posted a thousand or more times
Looking good! what's the boom made of? CF?
Christopher14
Driftin' with the wind...
I scalped a graphite fishing rod for my boom. Not sure how much it weighs though, but its light.
EDIT: Just weighed the boom, 37g.
Not sure how much it weighs though, but its light.EDIT: Just weighed the boom, 37g.
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Christopher14
Driftin' with the wind...
Lol, I guess I have some interesting flying ahead of me. I have used this kind of thing on my other FB DLGs with no trouble. I think I can make up the weight in small electronics.
I have used this kind of thing on my other FB DLGs with no trouble. I think I can make up the weight in small electronics.
Christopher14
Driftin' with the wind...
Yeah... CG is always a struggle. I'll find some way getting it to balance.
