ordering a new sail

i am getting ready to order a new lapper and am concerned about
measuring properly. the headstay length is no problem, but having
fixed jib sheet blocks makes the leech/foot measurements critical to
ensure equal tension. my bowsprit was lengthened so the stock
measurements probably won’t be right. any tips? thanks.
john churchill

John,
Measuring is simple enough. There are several to take though. Measure
total forestay
length, being, maximum hoist to the tack position at the bowsprit. While the
tape is up the forestay measure to the the deck at the rail at the outermost
shroud. Then measure to the sheeting point at the rail. Make sure you bring
the tape around the spreader when you measure the sheeting point. Then
measure to the top of the cabin trunk at the base of the mast. Take the tape
down and at deck level measure from the tack point at the bowsprit to the
sheeting point at the rail. Then measure from the tack point to the front of
the mast.
What we have just done is measure the basic foretriangle and the sheeting
point. Now we have to decide how big do you want your lapper to be. Yankee
or genoa. My assumption here is a yankee. Any way I have the sailplan for
the BCC and can extrapolate the LP or foretriangle percentage from your
numbers. Hope this helps,

Tom Dignam
Sobstasd Sailmakers

jchurchill@erols.com wrote:

i am getting ready to order a new lapper and am concerned about
measuring properly. the headstay length is no problem, but having
fixed jib sheet blocks makes the leech/foot measurements critical to
ensure equal tension. my bowsprit was lengthened so the stock
measurements probably won’t be right. any tips? thanks.
john churchill

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