PL Arcs can usually fly with slack rear lines. The stiffer the spars the better, carbon rods are best, aluminum is ok, fiberglass is usually heavy, don't use bamboo (I tried this once and the spar flex alone made the kite clap). Maybe try adding attachments for the rear lines from the end of the spars further towards the leading edge, called flares: http://www.arcusers.net/mx5alan.html.Rein de Vries wrote: ↑Tue Sep 10, 2019 6:31 pmWhen i pull the break lines the same effect is achieved i saw, and the kite flies better.
Before starting skin modifications maybe read this link for some ideas about curing the clap
http://www.arcusers.net/viewtopic.php?f=4&t=889