If you are picturing doing bottom turns like Mark Richards (see pic), you are doing it the wrong way...

- merkel_mrichards3.jpg (37.12 KiB) Viewed 4106 times
(as an aside, look up 'Mark Richards bottom turns' - the guy was the greatest ever. See his 'bottom turn off the wall' at pipeline, just a work of art - I think possibly my favourite ever surfing pic.)
Heck, here it is cos I love it so much (photo Dan Merkel)
Ok, after that interlude...
On a shortboard, you can do a rail turn, just lean against the rail and you do a nice 'U' turn. The board turns itself (you just weight it); for longboards you need to make much more of an effort (straight rails and all that). Doing the shortboard thing will probably dig in a rail or just slow you down a lot.
For LBs, you've got to be more careful with your weight, the same motion that gets a shorter board turning up the face will just cause the longboard to either do nothing (go straight) or just tip over. If you try to turn from too far towards the middle of the board (ie where you initially pop up), it may not work. The position of fastest trim speed on a longboard is not in the same place as the best place to turn it from.
In other words, with a long board you just can't lean and get a strong turn. At best you will get a long flowing turn if you have enough speed. If you dont, well you have found that out.
The answer is that you need to move your foot back and weight the back of the board and lift the nose out of the water (just a bit) and give your body a real twist and effort and physically turn the thing.
So think about your weighting and really try to turn, no namby pamby 'I'll just make a bit of an effort because I'm not sure of what I'm doing' - just commit.
That said, its much easier to angle the board. Just paddle into the wave with the board angled slightly in the direction that the wave is breaking. The amount of angle is simply a matter of experimentation and will vary on different waves. but 20 deg or so is a good generalisation. It doesnt make it harder to catch the wave. Alternatively, if you feel up to it, paddle straight but pop up and then immediately turn - look down the line, shoulders twisting, a bit of weight on the back foot. You dont have to turn 90 deg straight away, so 45 deg down the wave but in a continual turn and you will eventually start heading back up the wave.
Remember:
1. look straight, go straight. Look down the line, go down the line. After a while, this becomes muscle memory, you look down the line before you are even standing
2. lean
into the wave (setting the rail). Leaning into the wave is counter intuitive - leaning into the slope seems weird - but you need to do it otherwise the board doesnt 'grab' the wave and you cant turn.
Mmm, my last comment triggered a memory and again Jaffa to the rescue. Look at this thread and Jaffa's photos a few posts in - great example of both the rules above. See in particular his series of photos at Wed Aug 14, 2013 9:36 - pop up looking down the line, then there is a turn showing the tail weighted (nose a bit in the air)
viewtopic.php?f=15&t=22225Also the last post with the video showing the angling/pop up
Everyone (by that I mean me and therefore everyone!) stuffs things up now and then - angles too much and misses the wave, goes for a bottom turn too late, weights the back foot too much and bogs the board rather than turning it. But over time its less and less and so you too will be a pipeline