Lumenier RB2205C-12 2400KV SKITZO Ceramic Bearing Motor
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Old Feb 22, 2013, 12:01 AM
v00d0o is offline
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Carbon vs G10


After a builder has suggested that I use G10 for my quad,

I'd like to know the weight ratio between G10 to CF.

I know G10 is heavier but how much heavier? Would drilling designs into the g10 be a good idea of a hindrance to its strength?

Thanks!
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Old Feb 22, 2013, 12:10 AM
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What ratio are you referring to? Strength to weight? Stiffness to weight? Laminate thickness to weight?
Old Feb 22, 2013, 12:12 AM
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Quote:
Originally Posted by wyowindworks View Post
What ratio are you referring to? Strength to weight? Stiffness to weight? Laminate thickness to weight?
Weight of G10 in comparison to the weight of Carbon fiber.

For example:

if they were both 100mm x 100mm square plates (1.0mm thick)

Carbon fiber would weigh - 20 grams and g10 would weigh? (how much)

Thanks.
Last edited by v00d0o; Feb 22, 2013 at 12:13 AM. Reason: grammar
Old Feb 22, 2013, 06:27 AM
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Roughly the same.

Back of a smoke packet math:
Density of glass (only the fibres) is around 2.6gcm^-3, carbon is ~1.9.
Resin uptake is similar, so I'll assume a Vf of 50%.

Difference in density for the laminate is therefore 0.35gcm^-3, so a 10cm3 plate would have a 3.5g difference.

Strength/stiffness though would be very different.
Old Feb 22, 2013, 06:38 AM
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Quote:
Originally Posted by Odysis View Post
Roughly the same.

Back of a smoke packet math:
Density of glass (only the fibres) is around 2.6gcm^-3, carbon is ~1.9.
Resin uptake is similar, so I'll assume a Vf of 50%.

Difference in density for the laminate is therefore 0.35gcm^-3, so a 10cm3 plate would have a 3.5g difference.

Strength/stiffness though would be very different.
OK thank you.

What thickness would you advise? I used 1.0mm carbon for my previous quad...I want a similar strength. I read somewhere doubling the size of the thickness of g10 is equivalent to CF strength wise.
Old Feb 22, 2013, 07:02 AM
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Outside my expertise, sorry. Never done multirotors.
I'm not sure if you're after equal strength, or equal stiffness...
Old Feb 22, 2013, 09:19 AM
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I am actually really slow
G10 is heavier then Carbon of the same thickness
G10 Isnt as stiff as Carbon of the same thickness
G10 Is Cheaper
G10 will flex more before it breaks
G10 doesnt conduct electricty (something to consider also)

The usual thing though, atleast for helicopters, is that carbon is superior to G10 for frames. I wouldnt go back to G10 frames in a million years. If you crash your quad, both are going to break anyhow.
Old Feb 22, 2013, 09:34 AM
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I'm flying fpv. G10 maybe a better solution for the video tx and have less interference.
Old Feb 24, 2013, 11:47 AM
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I need to get Carbon Fiber Square tubing, is it better to have a round hole or a square hole in the center? Or does it not really matter. (the square hole would have 1.5mm walls and the circle has 1.5mm diameter) ...square hole is cheaper.
Old Feb 24, 2013, 08:09 PM
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http://image.tradevv.com/2010/08/10/...quare-tube.jpg

square or circle?
Old Feb 26, 2013, 03:10 AM
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The tube with the round hole will be stronger but heavier.


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