As always Brett, your threads are great catalysts for stimulating creative design/thought.
This flipper thread made me think of the old Rocket and Jet fins we used in a YMCA Scuba certification class I took with my brother when I was in my early teens.
Several potential new/non-traditional flipper designs might be possible.
Swaylocks Surfboard Design Forum: thoughts & theories ... practical & theoretical
RAIL PROFILE http://bgboard.blogspot.com/2014/03/march-82014-afterr-seeing-recent.html
Having freedom to create anything let’s my brain stroll around the possibilities of dimension, construction and materials.
The surf flipper is always going to have one purpose but what more could you get with a different design ?
whats needed ? Drive and lateral resistance in the tube sounds easy.
how about moving the blade further up the foot, So the middle of the blade length is your ankle ?
Could a flipper be a flexible glass form that wraps around your foot and ankle?
What sort of multi blade shape would work ? Would it be flexible, rigid, mechanical ? Or all three ?
The up stroke is useless for drive so what design would tap into that stroke to make it efficient ? Maybe a multi blade would work on the up and down stroke?
Maybe a tunnel blade rather than flat ?
usually I do a lot of ‘quick draws’ in my head looking for instant flaws or precedence and then start drawing shapes. I never let the materials come I to play until the end because they can be limiting when you’re really looking fo stretching concepts and shapes.
Even while writing this these words have given me some new ideas.
Just wanted to let you know that I was lurking, I'm enjoying the content,
It's an interesting subject to me. As you may remember I spent a little time playing with foot and handfin designs.
I'll chime in if I think of anything interesting to contribute
Hi Dave, while I’m not aiming at any type of surf activity I think that a kick-ass flipper design would predominately benefit bodysurfers because thats all we have in the surf.
However add a handplane and the benefit is more pronounced with lift and drive.
It’s still a soft idea swirling inside my head, loooking for an angle, a thread to follow...never set on any course even when it looks set.
Send me your dinged, damaged, and yellowed.
MS1, a few years ago, I considered fins attached to the knee guards I wore while riding my street rigs. Haven’t abandoned the concept.
But knee fins would limit you to body surfing and prone riding of body boards.
Monkstar,, The biggest problem with putting the fin on your shin or other places is keeping it from spinning around on your leg,(at least my spindly legs).
Thanks for the props Monkstar1, Th main problem with a shin placement is that it’s closer to the fulcrum of the hip/ knee combo. The further away from the fulcrum the deeper the arc / sweep / drive of the flipper.
There’s a tradeoff with flipper design like everything in life, use a massive flipper area and it impossible to use quickly, use a flipper that’s too heavy and it’s slow, use a flipper that doesn’t fit and no one likes it.
So a next gen flipper has to be the right area , at the right distance, that’s light and fits.
I always imagine the perfect design and aim for that. Not something 10% better, but something that’s out of the park amazing.
I’ve got a new double layered design that grabs each stroke and sends it efficiently out the back for maximum thrust. Design is easy , it’s getting the Human component to conform thats the issue.
What about something similar to the WAVE gloves? Why do the flippers need to be so long (I understand, for propulsion). I'd like to see a smaller, shorter type flipper so I could also stand on a board if needed.