ABSTRACT
Two long-established and well-known methods of drag reduction are the posture of the rider and aerodynamic interference when two riders are in close vicinity. The aim of the tests on the model and full-scale cyclists is to quantify the drag reduction. The measurements are carried out for four postures: hands on brakes, straight hands on drops, bent hands on drops (body crouched), and hands on ‘aero’ handlebars. Drag coefficients are calculated for each of the four postures based on riders’ projected area. The interference drag is measured for twenty tandem and staggered positions of two cyclists. Significant drag reduction up to 49% is found.
