Posted by Tom Sozzi on September 30, 2009 at 10:45am
my specs are as follows.....-wing span is 2 meters-root chord of frame is 12"-Tip chord is 6"-all wing ribs are cut from a 1/16" carbon fiber plate-there are six ribs on one wing-spars are 0.5" by 0.5" by one meter-there are three spars on each wing. one on top, two on the bottom.i just wanted a rough estimate of the weight of both wing frames. if this isnt possible does anyone know the density of carbon fiber?
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sorry, but I think your specification is not quite complete or at least not quite clear to me.
1. are those two individual panels of 1m each, or is the wing in one piece?
2. what do you intend to use as wing skins? The material and arrangement of the skins have a great influence on the integrity of the complete structure.
3. why do you want to cut the ribs from carbon fiber plate? Usually they do not need to be that strong that it justifies high strength material. Balsa wood is perfectly adequate (and lighter and cheaper).
4. The spars are 0.5" square and one meter long (indicating that you work with two panels??) What material do you use for the spars? If carbon fiber, that would be totally over the top - too stiff and too heavy. It all depends on the wing skins.
Have you thought about to combine two of the spars with some webbing to a single one? What for do you need the third spar? Spars are usually made up from cap strips and the (shear) web, which is only loaded in shear and also prevents buckling of the cap strips.
Are these panels the ones still missing from your last project "Kestrel" ? How do you intend to do the attachment to the basic structure (fuselage and wing stubs).
I would like to help you but need some more and accurate information.
Replies
sorry, but I think your specification is not quite complete or at least not quite clear to me.
1. are those two individual panels of 1m each, or is the wing in one piece?
2. what do you intend to use as wing skins? The material and arrangement of the skins have a great influence on the integrity of the complete structure.
3. why do you want to cut the ribs from carbon fiber plate? Usually they do not need to be that strong that it justifies high strength material. Balsa wood is perfectly adequate (and lighter and cheaper).
4. The spars are 0.5" square and one meter long (indicating that you work with two panels??) What material do you use for the spars? If carbon fiber, that would be totally over the top - too stiff and too heavy. It all depends on the wing skins.
Have you thought about to combine two of the spars with some webbing to a single one? What for do you need the third spar? Spars are usually made up from cap strips and the (shear) web, which is only loaded in shear and also prevents buckling of the cap strips.
Are these panels the ones still missing from your last project "Kestrel" ? How do you intend to do the attachment to the basic structure (fuselage and wing stubs).
I would like to help you but need some more and accurate information.
Regards
W.