Lighter wind pumping?

6 years ago
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excav8ter
excav8ter
602 posts
602 posts
3 May 2020 8:17pm
Good morning all. When I get out in lighter wind and need to pump a bit to get up on foil, i find i can do it easier on Port tack than i can on Starboard tack, i assume that a lot of people have a "strong side". My issue has been that when I pump the sail, my board tends to "round up" into the wind, even though I am trying to bear off wind a bit.
While I was out yesterday, I rigged up and hit the water with a 6.0 Sailworks flyer and the i84 front wing. The wind was enough that I rarely needed to pump at all, but when I did the usual happened, I round up. Towards the end of the session the wind dropped even more, i quickly slipped my i99 wing on and went back out. As I began to try and pump, I again rounded up. As I recovered from nearly falling to windward, my rearward hand slipped back towards the end of the boom. I recovered immediately tried to pump again and found that with my rear hand further back, the board did not round up on me, and I was able to get on foil a bit easier. Did I accidentally figure out what everyone else already knows?
segler
segler
WA
1663 posts
WA, 1663 posts
3 May 2020 8:39pm
Here's my guess. By moving your back hand further back, you are keeping the sail sheeted in, which increases the mast base pressure (MBP).

Increased MBP keeps the nose down and off the wind, thus preventing rounding up. This applies also for fin sailing, especially while waterstarting.

Instructors will tell you that increasing the MBP is pretty much the solution to most windsurfing ills. Sheet in, young man.
LeeD
LeeD
3939 posts
3939 posts
4 May 2020 12:36am
+1, my back hand is behind my adj out adjuster when pumping, then slides forward when up on foil after hooking in.
excav8ter
excav8ter
602 posts
602 posts
4 May 2020 12:43am
segler said..
Here's my guess. By moving your back hand further back, you are keeping the sail sheeted in, which increases the mast base pressure (MBP).

Increased MBP keeps the nose down and off the wind, thus preventing rounding up. This applies also for fin sailing, especially while waterstarting.

Instructors will tell you that increasing the MBP is pretty much the solution to most windsurfing ills. Sheet in, young man.


Good to know!

Do you sheet out when getting too powered up, or sheet in to keep the pressure on the nose?
Grantmac
Grantmac
2384 posts
2384 posts
4 May 2020 1:20am
Hands back gets the rig forward and upright. In really light wind oversheeting is the bigger problem.
MagicRide
MagicRide
688 posts
688 posts
4 May 2020 2:11am
I have found when I'm on foil nicely powered and then a gust comes that is too much to handle when sheeted in, I sheet out and lean forward a tad to compensate for sheeting out to keep my flight hight where I want it. This adjustment works perfect for me. So when I past the gust I sheet back in and resume my normal position again. I have not tried not sheeting out and riding the gust out. Not sure I want to try that route or I'm not ready to try that route.
Grantmac
Grantmac
2384 posts
2384 posts
4 May 2020 2:37am
MagicRide said..
I have found when I'm on foil nicely powered and then a gust comes that is too much to handle when sheeted in, I sheet out and lean forward a tad to compensate for sheeting out to keep my flight hight where I want it. This adjustment works perfect for me. So when I past the gust I sheet back in and resume my normal position again. I have not tried not sheeting out and riding the gust out. Not sure I want to try that route or I'm not ready to try that route.


Push the mast forward like the control column in an aircraft. Your foot pressure will naturally follow but in a much more subtle way compared to directly weighting the feet.
MagicRide
MagicRide
688 posts
688 posts
4 May 2020 2:48am
Grantmac said..

MagicRide said..
I have found when I'm on foil nicely powered and then a gust comes that is too much to handle when sheeted in, I sheet out and lean forward a tad to compensate for sheeting out to keep my flight hight where I want it. This adjustment works perfect for me. So when I past the gust I sheet back in and resume my normal position again. I have not tried not sheeting out and riding the gust out. Not sure I want to try that route or I'm not ready to try that route.



Push the mast forward like the control column in an aircraft. Your foot pressure will naturally follow but in a much more subtle way compared to directly weighting the feet.


I like it, makes great sense! I will try that. This foiling business is turning me into a darn kid. I just can't wait to go again! Haa!
WindMode
WindMode
812 posts
812 posts
4 May 2020 3:53am
Grantmac said..
Hands back gets the rig forward and upright. In really light wind oversheeting is the bigger problem.



This. Back hand back puts the rig upright. Huge point of getting on the plane in general, so very nice you figured it out ;).
martyj4
martyj4
538 posts
538 posts
4 May 2020 7:59am
I think what happens is when the back hand goes back on the boom, the sail moves forward relative to you and the board. This will tend to drag your body weight forwards, putting more pressure on your front foot, and tending to steer the nose of the board off the wind. Having your hand further forwards on the boom means the sail sits more to the back of the board, loading your back leg more and turning the board into the wind.
excav8ter
excav8ter
602 posts
602 posts
4 May 2020 8:46am
martyj4 said..
I think what happens is when the back hand goes back on the boom, the sail moves forward relative to you and the board. This will tend to drag your body weight forwards, putting more pressure on your front foot, and tending to steer the nose of the board off the wind. Having your hand further forwards on the boom means the sail sits more to the back of the board, loading your back leg more and turning the board into the wind.


Well that makes perfect sense. Going to put all these thoughts and tips to use.

Thank you!
stehsegler
stehsegler
WA
3578 posts
WA, 3578 posts
4 May 2020 10:16am
As they say a picture says more then a thousand words so I threw together a short clip with different techniques.
CYVRWoody
CYVRWoody
133 posts
133 posts
5 May 2020 7:36am
Long video on footstraps 32 minutes.

Heel vs Toes. 2 minutes.
Check out the diagram at 16:48. Small picture of foil pump toes vs heels.
thedoor
thedoor
2504 posts
2504 posts
5 May 2020 1:29pm
VCRWoody said..
Long video on footstraps 32 minutes.

Heel vs Toes. 2 minutes.
Check out the diagram at 16:48. Small picture of foil pump toes vs heels.


Sick as
Faff
Faff
VIC
1421 posts
VIC, 1421 posts
5 May 2020 7:12pm
stehsegler said..
As they say a picture says more then a thousand words so I threw together a short clip with different techniques.


Great video, thanks! What kind of setup is at 1:30? How (non)windy was it?
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