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Speed,Combat,Scale,Racing => Rat Racing and Team Racing => Topic started by: Howard Rush on October 05, 2011, 08:01:11 PM

Title: Strange F2C Line Drag Observations
Post by: Howard Rush on October 05, 2011, 08:01:11 PM

I heard a rumor about three-strand lines having less drag than smaller cylindrical lines.  Does anybody have more information?

Title: Re: Strange F2C Line Drag Observations
Post by: Les Akre on October 05, 2011, 09:22:42 PM

I believe the lines in question are the British "Laystrayte" brand control lines, which have been around for many years. Someone with more mathematical prowess than I can probably explain why they are less drag.

Les

Title: Re: Strange F2C Line Drag Observations
Post by: Howard Rush on October 05, 2011, 09:38:00 PM

Quote from: Les Akre on October 05, 2011, 09:22:42 PM

I believe the lines in question are the British "Laystrayte" brand control lines, which have been around for many years. Someone with more mathematical prowess than I can probably explain why they are less drag.

Les

Have people measured less drag with them?  Namely, do planes go faster and farther?

Title: Re: Strange F2C Line Drag Observations
Post by: BillLee on October 06, 2011, 06:30:15 AM

Yes, yes, yes.

I suspect that the diameter of the line is not constant and the stranded wire is smaller in diameter as a function of the twist in the three wires that make up the total. Twisted sufficiently tight to measure the desired diameter when the required micrometer is used, but loose enough to yield the desired reduction in cross section.