dtc wrote:This might be completely wrong but it was a theory I came up with during my last session, where I continually fell over and failed (but thats for a different reason)
The volume in bigger boards means three things (for catching waves): you can catch them earlier. you can catch them easier (because there is more volume for the wave to work on) and hence you can be out of position a little bit and still get them, and you can paddle into the right position earlier.
However, the downside is that a sucky wave will suck you up the wave face faster (because of more volume/floatier). So on a bigger board you need more momentum to overcome the water going up the face
On a short board, you dont need as much momentum because the water going up the face has less effect - you arent as floaty. So you just need to be in the right position and take a few strokes. Of course, you need to be in the right position; you simply dont have that margin of error you do with a bigger board. But you also dont need to have the same momentum.
I failed year 10 physics so I may be completely crazy.
I like your theory. I've been theorizing about "sucky waves" and getting hung up in the lip a little myself. The question I am trying to answer is: How can I look at a wave I might take off on and determine whether I'll get hung up in the lip? Getting hung up in the lip seems fairly common in surfing so shouldn't there be a way to avoid it? There are plenty of pros who get hung up in the lip so I don't think it is always a matter of paddling strength. The other day I was investigating this question by watching videos of surfers getting hung up in the lip (I found two vids and stopped. Laziness.

) Nevertheless, I've watched countless surfers experiencing this problem and experienced it myself quite often. I am certain that some of the times I've gotten hung up I have paddled perfectly and done everything correctly, yet, I still got hung up. WTF? I've definitely had my share of hang-ups from weak arms as well
Anyway, the majority of surfers I see who get hung up in the lip are there because they had a weak paddle or tried to get into a wave at the last second. Aside from paddle fitness the hidden factor, hidden to me at least, is often backwash, currents, refraction. If you watch videos of the Wedge, you'll see guys getting hung up all the time. Well, the Wedge has a powerful backwash flowing out of that corner jetty and it creates all kinds of havoc, AKA sucky waves.
Here's a guy getting hung up in the lip at 5:51. I like this video because it makes it pretty clear what the problem is . . . massive backwash.
[YouTube]n_LJo6qwY74
[/YouTube]The thing about backwash (basically water flowing against a wave) is that you often can't see it. At a beach break there is often a lot of chaos out there in front of the impact zone. That's why it helps to know your surf spot. Anyway, here's a good explanation for "sucky waves":
https://www.surfertoday.com/surfing/142 ... refraction (See the graphic below picture)
I meant to talk about buoyancy and volume in terms of getting hung up in the lip, but I gotta run. I might circle back to that later.