Spinnaker line loads


I recently went to the underdeck spinnaker sheets (previously on the surface). Keeps the deck nice and clean. My crew is complaining that since the change, the lines are really difficult to trim when the wind pipes up above 10 knts or so. Previously he had no problem. I have checked for binding etc and found nothing. My only thought is that the entry/exit angle on the rear block is wrong and the line coming forward is riding the on the lip of the rear block. Seems a stretch. Only other reason is my crew has suddenly lost his stregth. Any advice?

I did the same switch 2 years ago.  I think, in heavy winds, the exit angle from the forward block makes a difference.  On mine the exit point from the seat is further astern than the deck mountedblocks I had on my old boat and the block is smaller than on the old boat as well.  The line also exits at a lower spot relative to crew position. Maybe those factors are contributing to a lack of mechanial advantage (i.e.  you are pulling from behind (or 90 degree angle) and below where the crew is sitting.
 You might try flying the chute from the helm spot to see if you notice the difference as well.

I think you are on to something. I will check everything in detail when I unwrap the boat after the long Ohio winter.
I really don't like to see the skipper flying the chute on our lake. The wind shifts so much its a constant battle to keep the thing flying and pulling. Means the helm is not being attended to and is an issue in close racing. However, the experiment will provide further insight. Thanks

That's how most of us do it on our smallish lake with lots of shifts.  You can still adjust the guy as frequently as needed, but it's a lot easier to handle the guy up on the deck than it is coming out of the seat, and you can always lock it off when needed.  We never, ever cleat the sheet.

If you have the guy cleat installed on the deck just rear of the shroud chainplate assembly, then use that to control and lock off the guy instead of trying to pull where the sheet comes out of the seat.  We find it much easier to control the guy this way, and then the other crew's other hand is free to control the sheet where it comes out of the seat.  

I dont have a cleat but easily install one. My only thought is that on our lake, the wind shifts so much its never a smart idea to cleat off the spinnaker line. But I agree, this sounds like a good idea.

Sorry for tardy response/update but I took the advice given on the forum and installed the deck cleats. Problem solved. Thanks.