Watched the end of Summer Rental last night.
3 huge flaws.
FLAW 1
They have a crew of about 10 people, most of which are doing fuck all during the race. But they find a fridge full of shrimp on the boat so they lighten their load and pick up speed by throwing the food - cardboard container and all - overboard.
1. Fucking littering
2. If it was that big of an issue, maybe don't have multiple humans on the sailboat who are just along for the ride and weighing the boat down way more than the food.
FLAW 2
They send the dumb Swede out to get a sail. He has trouble finding one, but eventually gets lucky and finds it right before the race starts. Halfway through the race when they get with the wind, they unfurl this sail he found - and it just so happens to have their race entry number stitched on it that matches the other sails they already had. What the fuck ever.
FLAW 3
John Candy was an air-traffic controller and during the race he sees that a small airplane is struggling to fly straight and Candy immediately recognizes the issue as a funnel gunnel - a low altitude channel of wind. So he moves the boat into the funnel gunnel and they pick up all sorts of speed - but when they show the race his boat is literally right next to the Incisor. If the Barnacle caught the wind from the extra wind, the Incisor would have caught it too and kicked their ass.
Other mentionables:
I don't know why Kerri Green never had a bigger career. She was cute in this movie and also in Goonies, but didn't have much of a career. Decent actress too.
Richard Crenna, the antagonist sailor in this film, was in Rambo First Blood 2 that same year.