100" wings ressonance
01-13-2005, 11:16 AM
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100" wings ressonance
Hello
I just fkied foir the first time a sailplane with a Fuse on Carbon fiber /glass fiber.
Wings are 100" on foam/wood.
Once wings are pluggled in span is almost 104".
I noticed when the plane reaches certain speed, it starts shaking and trembling like having ressonance on the wing tips, I get scared and apply breaks so it stops.
The plugg-in system I set is with 1/4" iron rod (2) put in 9/32" Brass tubing, each rod penetrates about 10" on each half wing.
I used to have these wings on a differente fuse (modified riser) and worked OK, in that set the wings spanned shorter since they placed above fuse with rubbers on it, in the new set each half is by fuse's side.
I am very scared with this problema, just a month ago, I downd the sailplane for speeding up and when pull for recovering, one half wing just exploded and you wonder what happened.
On this new set I continously slow dwon with butterfly mix.
If I lengthen the plugg-in rods could the problem stop?
Thanks in advance for any help
Regards
I just fkied foir the first time a sailplane with a Fuse on Carbon fiber /glass fiber.
Wings are 100" on foam/wood.
Once wings are pluggled in span is almost 104".
I noticed when the plane reaches certain speed, it starts shaking and trembling like having ressonance on the wing tips, I get scared and apply breaks so it stops.
The plugg-in system I set is with 1/4" iron rod (2) put in 9/32" Brass tubing, each rod penetrates about 10" on each half wing.
I used to have these wings on a differente fuse (modified riser) and worked OK, in that set the wings spanned shorter since they placed above fuse with rubbers on it, in the new set each half is by fuse's side.
I am very scared with this problema, just a month ago, I downd the sailplane for speeding up and when pull for recovering, one half wing just exploded and you wonder what happened.
On this new set I continously slow dwon with butterfly mix.
If I lengthen the plugg-in rods could the problem stop?
Thanks in advance for any help
Regards
