I have heard that iflight's Green Hornet uses T700 carbon instead of 3k carbon. What difference does the new T700 carbon make?
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3 Answers
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The "T" stands for Toray Composite "TORAYCA" carbon fiber The frame probably uses T700G, based on the applications Toray has listed for the 2 types of T700. T700 is also the fiber itself, and not the weave.
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First of all, the 300 or 700 is the grade value of carbon fiber and generally, a higher grade means more strength and better performance. The main differences between T300 (3k) carbon and T700 carbon are that T700 carbon has almost 40% more tensile strength than 3k carbon, T700 carbon is slightly denser (and thus heavier for the same volume of carbon), T700 carbon fiber has a higher carbon content and a lower nitrogen content, and T700 carbon fiber is smoother looking while T300 carbon looks more bark-like.
So, overall, T700 carbon is better for making a drone frame because it is significantly stronger with only a small increase in weight.
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$\begingroup$ T300 is not the same as 3k. 3k refers to the number of filaments in each tow, not the material used: nj-mkt.com/news/861.html $\endgroup$ Jan 31 at 13:10
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T700 and 3K are different indication. T700 indicate the strength of the frame (higher strength/weight ratio) 3k usually means the number filaments on the surface layer. You can have a carbon fiber sheet T700 3K
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$\begingroup$ This was downvoted, but seems to be fundamentally correct: estcarbon.com/blog/carbon-fiber-what-is-k or nj-mkt.com/news/861.html or nextie.com/difference-between-weaves-UD-3K-12K $\endgroup$ Jan 31 at 13:13