Big angled bi fins

[Peter123]

Hi freedivers,

do you know a pair of bi fins with a realy big angle around 25°?

Best regards,
Peter

 

[bobone11]

c4 are around 30° methinks

 

[Peter123]

c4 are around 30° methinks

Hi,

thanks. I cant find amy details to angle on their webpage. However c4 fins are also out of my budget.

 

[bobone11]

maybe allemanni speedy? they are 27 i think

 

[Bill McIntyre]

How about DiveR? They have an extreme angle.

 

[Peter123]

maybe allemanni speedy? they are 27 i think

How about DiveR? They have an extreme angle.

Looks great.

I found these - Salvimar 151 with 29 degrees - optional in plastic or carbon fiber. I think I will go with the plastic version first to figure out if this extreme angle fits me.

 

[Vov]

Sorry to interfere... Guys, what happens when the leg with a high angle bent blade starts and does the backwards part of the paddling move? I mean if one is really trying to put an effort during the backwards move...

 

[Peter123]

Sorry to interfere... Guys, what happens when the leg with a high angle bent blade starts and does the backwards part of the paddling move? I mean if one is really trying to put an effort during the backwards move...

I dont get it. Sorry

 

[Bill McIntyre]

Sorry to interfere... Guys, what happens when the leg with a high angle bent blade starts and does the backwards part of the paddling move? I mean if one is really trying to put an effort during the backwards move...

Since your foot is not in line with your leg but pointed downward, the blade is very close to parallel to the surface and it works just fine.

 

[Bill McIntyre]

In case that explanation wasn't clear, here is a photo of my foot. Unless your ankle is a lot more flexible than mine, the foot doesn't line up with the leg. But if you imagine a blade with a big drop angle extending from my foot, it will be pretty close to in line with my leg. I've had fins with no drop angle, and they are very hard to use on the surface.

 

[Vov]

Hi, Bill! Yeah, that has been clear for more than 10 years... I am trying to discuss something I have seen occasionally and hope others have noticed too: When people, using hi-angled fins try to paddle (downwards, upwards or horizontally) with very little or no bending of their knees, their body starts rotation left-wright - along its longitudinal axis. Which means the forward and rearward going kicks are different in propulsion and ...the direction of the propulsion is not the ideal one.
So maybe, if we restrict the angle of bending the blade to a certain value, we will get more efficient paddling... I am beginning to think the angle should never exceed the angle of the ankle...or even less. I am trying to squeeze some tiny pieces of efficiency here. Paddling with as less bending of the knee as possible seems to be the most efficient in terms of O2 spending.

 

[Bill McIntyre]

OK, you're out of my league here.