Pilot gig oar

 I was able to get up close to a pilot gig oar on Bryher. The oar is about 4 metres long and the pivot point is at about 1 metre. On a good day I could probably pull up 25kg so the force would be 250N. The blade is 3x further than the pull so the force on the water would be 750N. There are 6 oars in a gig so 4500N. The power will depend on the time to pull through. I should have timed that when I watched the race...