oapbillf Posted June 12, 2021 Report Share Posted June 12, 2021 Hi Kite fliers, During this pandemic I decided to make something different from a quad, using a free plan downloaded I have made a 8ft BOL, It flies great with a lot of pull BUT frequently collapses when it moves to either side of the wind window ! Are there some BOL experts out there somewhere in the ether who has a solution ? Bill Quote Link to comment Share on other sites More sharing options...
Mitch Posted June 12, 2021 Report Share Posted June 12, 2021 In my limited experience, all bols can have an edge lap or have the entire shape collapse. The deeper the cross section (more hemispherical) the more likely it is. I have seen some makers put "prairie points" on their bol...that is they are tethered to long wedges the project from the rim of the sail. I think that spilling wind off the edge like that may put pressure on the outer sail to keep it from collapsing. But that's an observation and I myself have not tried it. Quote Link to comment Share on other sites More sharing options...
oapbillf Posted June 13, 2021 Author Report Share Posted June 13, 2021 Thanks Mitch, I understand what you are saying but what I am considering is adding some form of venting on the outer edge just inboard of the bridle attachment points ! Will it work ? don't know until I try it ! I am surprised that you are the only person to reply so far ! Quote Link to comment Share on other sites More sharing options...
Zuul Posted June 13, 2021 Report Share Posted June 13, 2021 I’d be happy to share what I know about Bols. They’re pretty. Not very helpful, right? 😉 Staying tuned in, though. Maybe I’ll make one some day. Quote Link to comment Share on other sites More sharing options...
Edmond Dragut Posted June 14, 2021 Report Share Posted June 14, 2021 adding the holes will make the bol to spin faster and also to lose pressure faster. if i am not wrong to prevent the collapse first thing will be to give a longer towing line. that will make the bol to auto adjust better in wind window left to right. a second remedy may be to add more bridle, smaller space in between will keep better the edge Quote Link to comment Share on other sites More sharing options...
oapbillf Posted June 15, 2021 Author Report Share Posted June 15, 2021 On 6/14/2021 at 6:47 AM, Edmond Dragut said: adding the holes will make the bol to spin faster and also to lose pressure faster. if i am not wrong to prevent the collapse first thing will be to give a longer towing line. that will make the bol to auto adjust better in wind window left to right. a second remedy may be to add more bridle, smaller space in between will keep better the edge Hi Edmond, You have given me some good options to try, thanks ! The Bol has 15 bridle lines at 13ft in length so I will not add any more yet, Towing line length is the easiest thing to try but for now I will vent the outer edge where the collapse emanates and see what happens ! Its all about experimentation, if you don't try you will never know. Quote Link to comment Share on other sites More sharing options...
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