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General control line discussion => Open Forum => Topic started by: Cliff Henke on December 23, 2012, 09:41:20 PM

Title: Are .015 stranded lines good for OS46LA flying, been using .018 but shows sag.
Post by: Cliff Henke on December 23, 2012, 09:41:20 PM

I have been using .018 stranded lines for about a year but I had been using a set of .015's prior to using the .018. 

Think I read somewhere else that .018 was the size that I needed to change to but now I hear a lot of talk about folks still using .015's still.

Nothing wrong with the roll of the roll of .015. Just sitting in the flight box.

With the .018 lines at 10,000 rpms, it shows noticeably little more sag than the .015's and the .015's had some sag the last 1/5 length of line if I remember right ?

I'm not worried about passing a tournament test but I do want to fly safe, just lite ? Any advice would be appreciated, Cliff

Title: Re: Are .015 stranded lines good for OS46LA flying, been using .018 but shows sag.
Post by: Paul Taylor on December 23, 2012, 10:03:25 PM

AMA rules goes by the weight of your model.

How long are your .018s?

Title: Re: Are .015 stranded lines good for OS46LA flying, been using .018 but shows sag.
Post by: Trostle on December 23, 2012, 10:06:04 PM

If you are flying in CL Precision Aerobatics competion, the rules for stranded lines require .015 lines on models from 40 to 64 oz.  .018 stranded lines are required for models from 64 to 90 oz.

KT

Title: Re: Are .015 stranded lines good for OS46LA flying, been using .018 but shows sag.
Post by: Cliff Henke on December 23, 2012, 10:26:50 PM

The Brodak 38 Special weights 42 oz. and the Sig Twister weights 40 oz. This is with no fuel.

Title: Re: Are .015 stranded lines good for OS46LA flying, been using .018 but shows sag.
Post by: Howard Rush on December 23, 2012, 11:02:34 PM

.015" lines are fine.  If you use the .018" lines, move the leadout guides at the wingtip back a little.

Title: Re: Are .015 stranded lines good for OS46LA flying, been using .018 but shows sag.
Post by: john e. holliday on December 24, 2012, 08:31:01 AM

This reminds of when I went with .012 lines on the ARF Flite Streak, just because I could.   Went back to .015 for better control, or seemed I had better control.

Title: Re: Are .015 stranded lines good for OS46LA flying, been using .018 but shows sag.
Post by: Dennis Moritz on December 24, 2012, 08:56:48 AM

Weight of lines is significantly different when going from one size to another. I like light as I can use. 7 strand may stretch less than 15 strand. I think.

Title: Re: Are .015 stranded lines good for OS46LA flying, been using .018 but shows sag.
Post by: Howard Rush on December 24, 2012, 11:38:59 AM

I did some stretch tests.  The seven-strand .015" I tried was about the same stiffness as the 19-strand Tom Morris line.

Title: Re: Are .015 stranded lines good for OS46LA flying, been using .018 but shows sag.
Post by: Cliff Henke on December 24, 2012, 12:26:22 PM

Sorry Paul, the lines are 61' long. Not including the handle lead-outs or the inboard wing lead-outs.  Cliff