Fin History Question

This message is for anyone who knows something about, or was around during the shortboard revolution. I’m trying to find some information about the fins used on the first single-fin shortboards. What size fins were guys like Greenough, Lynch and Young using on their transitional shortboards? I’m especially interested in the Greenough-style dolphin fins. When I look through old films and magazines, the fins look really long. I’d like to know what size they really were. I noticed that most single fins today are generally between 7" and 10". If the fins really were longer in the 60’s and 70’s, why did they come down in size? Thanks for the help!

This message is for anyone who knows something about, or was around during > the shortboard revolution. I’m trying to find some information about the > fins used on the first single-fin shortboards. What size fins were guys > like Greenough, Lynch and Young using on their transitional shortboards?>>> I’m especially interested in the Greenough-style dolphin fins. When I look > through old films and magazines, the fins look really long. I’d like to > know what size they really were.>>> I noticed that most single fins today are generally between 7" and > 10". If the fins really were longer in the 60’s and 70’s, why did > they come down in size?>>> Thanks for the help! Alot of those boards had real wide tails so vee helped get the board to lay over onto the rail and long fins to not sideslip on hollow overhead waves, the brewer/hynson shapes changed that (narrower, downrailed). Check out rainbowfins.com

Alot of those boards had real wide tails so vee helped get the board to > lay over onto the rail and long fins to not sideslip on hollow overhead > waves, the brewer/hynson shapes changed that (narrower, downrailed). Check > out rainbowfins.com Thank you for the helpfull info. Do you know the average length of fin used on boards back then?