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  1. #1
    TampaRC's Avatar
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    Line lenght for .049

    What is the longest line length one can use with 1/2a c/l planes for best stunting?

  2. #2

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    RE: Line lenght for .049

    IT all depends on the 049 engine you are using.
    If its a Cox 049 read valve engine 35' x .008" lines a would be the limit.
    If you are using Cox 049 TD, Brodak 049, or Norvel and AME 049's you can go to 42' lines.
    This is what I'd use here in Aus but you'll  probably get other opinions from your end.

    Fredo

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    RE: Line lenght for .049

    My experience supports Fredo's recommendations.

  4. #4
    TampaRC's Avatar
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    RE: Line lenght for .049

    I'll be using a Norvel. When you mention the line diameter, are we still talking about the standard 1/2a Dacron type string or wire?

  5. #5

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    RE: Line lenght for .049

    I haven't used them, but Spectra type fishing line seems very popular for 1/2A. There are lots of posts about it. I've used 008 cables for many years. They work very well, but are fragile. Dragging them through grass will likely kink them.

  6. #6

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    RE: Line lenght for .049


    If you are fortunate enough to have a PAW .049 SBR diesel, you can fly with 44' X .008" stranded lines.

    My Ringmaster Jr will stay tight during overhead eights for an entire tank full. The PAW .049 diesel provides

    very useful stunt torque and power for stunt flying; it's actuallly a far better stunt choice than the TDs.

    Tony

  7. #7

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    RE: Line lenght for .049

    Dacron line is fine for line lengths up to 30 ft or so, above that and the drag builds up pretty fast, the line will arc well behind the plane with too long dacron. For longer line, use .008 steel cable. As others have mentioned it is very fragile, buy several sets and watch for kinks. I have tried Spider Wire but found it to be more drag than the Dacron, maybe I used the wrong size.

    Stunting doesn't require longer lines. You can easily do the entire beginner stunt pattern with 30 ft dacron line. Personally I have found .008 steel cable is not worth the trouble and use Dacron line gor all of my 1/2 a flying. I would try the Dacron line first, start with 30 ft and work up from there. If the plane is still to fast by the time you get up to 35 ft then it might be time to buy the steel cable. It all depends on the speed of your plane.
    I fly aircraft at the leading edge of trailing edge technology!

  8. #8

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    RE: Line lenght for .049


    ORIGINAL: paw080


    If you are fortunate enough to have a PAW .049 SBR diesel, you can fly with 44' X .008" stranded lines.

    My Ringmaster Jr will stay tight during overhead eights for an entire tank full. The PAW .049 diesel provides

    very useful stunt torque and power for stunt flying; it's actuallly a far better stunt choice than the TDs.

    Tony
    Sorry Tony, I should have mentioned the PAW.
    I'm one fortunate enough to own a PAW 049 Mk1 SBR, the purple anodised one.
    What a delightful engine. Probably the best 049 I've owned.
    I've only used it in FF models and it's up fron of a Gentle Lady for power assist RC gliderat the moment.
    Must build a Ringmaster Jnr one day.

    Fredo

  9. #9
    TampaRC's Avatar
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    RE: Line lenght for .049

    What is everyone's thought on Sullivan's Kevlar fiber lines? They are showing 52' for .049 and 60' for 0.61

    www.sullivanproducts.com/ControlLineMainFrame.htm

    Would this have the same drag problems as 52' of Dacron?

  10. #10

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    RE: Line lenght for .049


    ORIGINAL: TampaRC

    What is everyone's thought on Sullivan's Kevlar fiber lines?* They are showing 52' for .049 and 60' for 0.61

    http://www.sullivanproducts.com/Cont...eMainFrame.htm

    Would this have the same drag problems as 52' of Dacron?
    Note that those Kevlar lines say .49 and .61, not .049 and .061...although those lengths indicate 1/2 A.

    I have not tried them. The only comments I have read about Kevlar lines is that they were tried and relegated to stooge use because they generated too much drag. Perhaps they have been significantly improved. Let us know if you try them.

    I have used Sullivan steel lines, control handles, fuel bulbs, etc. successfully.

    George

  11. #11
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    RE: Line lenght for .049

    They are about .018".  Way too thick for 1/2A.  They aren't perfectly round either.  It is good to be yellow when they are on the ground so you don't trip over them.
    Glow Head Hood # 7

  12. #12

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    RE: Line lenght for .049

    10 lb spectra (make sure it's braided spectra and not monofilament), is great, no worries about kinking and if you go for the yellow it's easy to see.
    Go knife edge your cub!

  13. #13
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    RE: Line lenght for .049

    One could go with modern GSUMP (gel spun ultra high molecular weight polyethylene) with example trade names of Spectra, Dyneema, etc. in 20 lbs. test, nominal diameter 0.01" for aircraft up to 24 oz weight using up to an .09 engine or 300 Watt electric motor. Then they would be compliant with the AMA guidelines. (Ref. AMA safety standards, which refer to the 2013-2014 Competition Regulations Control Line General, Rules Governing Model Aviation Competition in the United States.

    These are only recommendations for non-competition use, but it does permit one to err on the safe side. I bought 100 m length of Dyneema in 30 lb test off E-Bay for around $7 shipping included. I went with the slightly heavier weight because the 20 lb test by this particular vendor didn't meet the diameter requirement. If I were to fly in a club that adopted the AMA recommendations for sport flying would be in compliance automatically. I intend to fly aircraft to include .09, which are heavier than .049.

    However, I doubt seriously a club would bar someone from sport flying by micrometer measuring one's lines prior to flight. Main thing required by AMA safety rules is visual inspection and the pull test, which verifies that the entire U-control system including the U-handle, lines, aircraft leadout wires, leadout guide, bellcrank, and airframe are in sound condition and that the model is properly restrained from flying loose and injuring someone. [8D]
    George Hostler
    Clovis MADS AMA Club, Vintage R/C Society (VRCS)
    And we know love by this, that He laid down His life for us, and we ought to lay down our lives for the brethren. 1 John 3:16

  14. #14

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    RE: Line lenght for .049

    I've seen a big flite streak flown on the Sullivan kevlar lines, and it flew better than I expected. Next time out the guy has steel lines and was ecstatic about how much better they worked than the kevlar.

  15. #15
    GallopingGhostler's Avatar
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    RE: Line lenght for .049

    I thought Kevlar was a different material from GSUMP. Don't know much about it, first time I heard of it. So far have heard positive comments regarding Dyneema, Spectra (GSUMP).
    George Hostler
    Clovis MADS AMA Club, Vintage R/C Society (VRCS)
    And we know love by this, that He laid down His life for us, and we ought to lay down our lives for the brethren. 1 John 3:16

  16. #16
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    RE: Line lenght for .049


    ORIGINAL: TampaRC

    I'll be using a Norvel. When you mention the line diameter, are we still talking about the standard 1/2a Dacron type string or wire?
    I've never tried the fishing line but I did fly a friends model on it and it performed very well. He is an ex-Cox engineer and his engines perform very well by design, he's "into" 1/2A's. I believe the model i flew was powered by a Norvel or Wasp .061 and I flew the standard AMA Stunt pattern with it with no problems.

    I used the stranded Sig .008 steel wire cable when sport flying 1/2A's, and when flying Speed events we were required to use certain sizes of solid wire. .010 was the last I remember.

    The Norvel is a great engine, the Wasp is too. I've only used the R/C version for Scale models but they're very user friendly.
    Chris...


  17. #17
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    RE: Line lenght for .049

    I use 10 lb PowerPro spectra yellow line. Line length depends on many factors. On my Baby Ringmaster I am useing 37' lines with a Baby bee and a 6x3 Top Flight nylon prop. On my strong reedy's with 5-5.5 x3 apc turning 16-18 k rpm I can run excess of 42' with no problems. The fishing line is the way to go.

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  19. #19
    GallopingGhostler's Avatar
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    RE: Line lenght for .049

    That looks like the Spectra stuff.
    George Hostler
    Clovis MADS AMA Club, Vintage R/C Society (VRCS)
    And we know love by this, that He laid down His life for us, and we ought to lay down our lives for the brethren. 1 John 3:16

  20. #20
    rcflyer-rick's Avatar
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    RE: Line lenght for .049

    Sorry took so long to reply. Yes that's it. I just ordered a 500 yard spool of red 10 lb (same thing different color) off the bay. Just put together some Skyrays for a fun fly at our club. Rick

  21. #21

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    RE: Line lenght for .049

    The Sullivan lines have the drag factor of a 60 lb rock.
    Try Fireline from the tackle shop. The late George Aldrich wrote me once that he had tried Spiderwire and didn't like it, but he thought that the Fireline had great potential for 1/2A C/L.

  22. #22

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    RE: Line lenght for .049

    They make a good stooge release line and that is about it.

    JK

  23. #23

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    RE: Line lenght for .049


    ORIGINAL: GallopingGhostler

    One could go with modern GSUMP (gel spun ultra high molecular weight polyethylene) with example trade names of Spectra, Dyneema, etc. in 20 lbs. test, nominal diameter 0.01" for aircraft up to 24 oz weight using up to an .09 engine or 300 Watt electric motor. Then they would be compliant with the AMA guidelines. (Ref. AMA safety standards, which refer to the 2013-2014 Competition Regulations Control Line General, Rules Governing Model Aviation Competition in the United States.

    These are only recommendations for non-competition use, but it does permit one to err on the safe side. I bought 100 m length of Dyneema in 30 lb test off E-Bay for around $7 shipping included. I went with the slightly heavier weight because the 20 lb test by this particular vendor didn't meet the diameter requirement. If I were to fly in a club that adopted the AMA recommendations for sport flying would be in compliance automatically. I intend to fly aircraft to include .09, which are heavier than .049.

    However, I doubt seriously a club would bar someone from sport flying by micrometer measuring one's lines prior to flight. Main thing required by AMA safety rules is visual inspection and the pull test, which verifies that the entire U-control system including the U-handle, lines, aircraft leadout wires, leadout guide, bellcrank, and airframe are in sound condition and that the model is properly restrained from flying loose and injuring someone. [8D]

    Nice icon: Sterling Hornet, still have one in the kit stash.

    JK

  24. #24
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    RE: Line lenght for .049

    I've got one too. Hoping to one day template it, so I can share the wealth.
    George Hostler
    Clovis MADS AMA Club, Vintage R/C Society (VRCS)
    And we know love by this, that He laid down His life for us, and we ought to lay down our lives for the brethren. 1 John 3:16

  25. #25

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    RE: Line lenght for .049


    ORIGINAL: GallopingGhostler

    I've got one too. Hoping to one day template it, so I can share the wealth.
    Hard to find today. Same basic concept as the Jetco Dragonfly (profile there) of around the same era.

    John


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