Quote: "would that help sailing speed all that much?"
No it wouldn't. You wouldn't know the difference, cos it's NOT from additional fore-triangle the EH24 gets whatever little speed she has. The difference twixt your present setup and a 110% hdls on a forestay taken to the end of the sprit is not likely to be more than 1/4 knot
in 15 knots of wind
on the beam.
And you are rather asking the wrong question about lee and weather helm, so consider this: In the general case - yours is special case, methinks - moving the CE forrard will TEND towards lee helm, i.e. the head
of the boat will tend to turn to leeward. Moving the CE aft will TEND to give the boat weather helm, i.e. the boat will tend to luff up. The DESIGNED CE can live comfortably in a small range fore'n'aft because the sheeting of the sails
, as they are trimmed from moment to moment, affects the helm.
I dare say that in your particular, special case, somebody has been monkeying with your rig, and your job is therefore to CORRECT the damage that was done to the boats tracking ability. Your helm, I dare say, is now MUCH too "hard". Loosing the sprit and using the wrong hdsl will have buggered up the boat's "balance on the helm". The balance will not be what McInnes intended it to be.
As Snowpetrel said: The hedsl is NOT for speed. It's for trimming the helm. Remember what I told you many responses ago: In THIS boat the drive (on a close reach) comes from having a nice laminar airflow over the first foot or two of the main. A 110% hdsl will help to give you that, and it doesn't have to be a "deck sweeper" either. The clew can be at the height of your gooseneck, or even higher, and a high clew like that confers advantages in terms of actual sail-handling when coming through the wind
as well as in terms of being able to see what's on your lee bow.
Snowpetrel said not to rely on a bobstay. In a modern rig I would agree with him. (Modern rig? Bobstay? Oxymoron!) But the forestay tension on this little boat (as designed) is diminutive compared with the tension on a MODERN boat's forestay. McInnes designed the boat for a sprit and, therefore, given the era and the general design idiom, he would have provided for an attachment for the bobstay low down on the cutwater, probably right at the waterline, in order to optimize the triangulation.
IMO on this stumpy little foredeck a Solent stay would be unnecessary and be a PITA in more ways than one :-)!
If, in addition to having a nice laminar flow on the back of the main, you can contrive a tidy laminar flow all along the hdsl luff, Bob's yer uncle. It's a LOT easier to get that well behaved flow with a hanked-on sail than with a roller furl. Consider also that a roller FURL is NOT a roller REEF. It you reef (reduce area) with a roller furling
or roller reefing hdsl, you play hob with the desirable laminar airflow. Sometimes one might be willing to trade
speed and weatherliness for the convenience of a roller furl. I don't think yours is one of those cases, cos the EH24 requires (and deserves) all the drive you can give her.
If I recall
, she's 21 feet LWL. So all the speed you are ever gonna get is 1.3 * 21^1/2 = 6 knts. And you'll be damn lucky to get that! TrentePieds is 25LWL so she is good for 6.5 knots. Theoretically. But with a mast roller furling
main AND a roller furling
hdsl I'm lucky to get 5! The previous owner, who "improved" TrentePieds, was EXTREMELY weak on the fundamental concepts. But who cares? Like the EH24, TrentePieds was designed to be a MOTORSAILER
, not a sailboat. And NOTHING goes to weather like fifteen hundred RPM
:-)! I get 5 knots at 1,500RPM delivering about 10HP. Push it to 2,100 RPM
and, say, 16HP and she begins to climb her own bow wave and gets all squirrelly. Your little ship will do that too, if you push her too hard under power, tho not as bad as mine cos you have the advantage of a long keel
and a "real" rudder
instead of the silly little spades they put on modern boats :-)
But as I said before: Just go sailing ! You'll learn all about this abstruse stuff as you gain experience. And the stuff won't really make sense to you until, and unless, you gain experience,