Answer Happy

The Flugtag challenge requires challengers to jump from a peer and glide as far along a distance of water as possible. A glider used in a Flugtag challenge is shown in the diagram below. The glider weights 30kg and the challenger piloting the glider weights 75kg. The wing span is 7.6m with a uniform chord of 0.9m. The drag polar for the glider is Cp = 0.02 + 0.031CL? (a) Winglets are typically observed to point up on conventional aircraft. Why might this glider have the winglets pointing downward? [2] (b) Calculate the Cland Ca values assuming the glider is flying under maximum distance conditions. [4]

(c) What velocity must the glider be flying at to maintain enough lift during maximum distance conditions? [4] The pilot runs and jumps off of a pier raised 15m from the water. (d) Assuming the pilot is flying at minimum drag conditions, what is the maximum distance they can fly before landing in the water? Also calculate the angle that they approach the water at. [4] (e) In reality, it is unlikely the glider will achieve this distance. Why is this the case? Propose a design constraint that an engineer should consider when designing a glider for this challenge based on your answer. [3] (f) List the main components of profile drag and how an engineer can minimise these components in the glider design above. [3]