3 ms·The purpose is slightly different though: on sails their goal is to detect turbulence and stalls.by ithkuil 5y agoThe purpose is slightly different though: on sails their goal is to detect turbulence and stalls.liamkinne 5y agoAirplanes can also have these fitted on the wings. Although not as common as yaw strings and usually for demonstration purposes._Microft 5y agoThese are tufts that you mean? https://en.m.wikipedia.org/wiki/Tuft_(aeronautics) https://en.m.wikipedia.org/wiki/Tuft_(aeronautics)