It's generally agreed that having a fine trailing edge on foils is a
good idea.

Q1. (easy) Is it better to a have a squared off edge or a rounded edge
to minimise drag?

Q2. (slightly harder) Assuming no ventilation, what is the equation for
the limiting drag on a plate section? You'll need to explain your answer
for the edification of others!

These are easy questions for an engineer but how long will it take Doug
to post the answers? Google may not help!


C'mon Doug the clock is ticking.

Cheers