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View Full Version : Whisker Pole-Birdsmouth douple tapered



Noah
01-09-2005, 04:47 PM
Roshika, my 36'6" Hinckley doesn't have a Whisker Pole, and I want to make one. I'm thinking that it would be for the Genoa, which has a foot of about 15ft, and a hoist of 41. How do you figure out how long to make the pole? It's about 4'6" from the mast out to the gunnel if it matters, and the genoa is a 150%.

How do you go about making a double taper, IE thin on either end, or is that not neccesary? Has anyone found nice bronze whisker pole fittings?

I'm sure I will have more questions, but that should be enough to get the ball rolling...

Noah

rbgarr
01-09-2005, 05:16 PM
Pricy asking prices, but may suit your needs-

http://motors.search.ebay.com/_W0QQgotopageZ1QQsassZboatQ2djerryQQsorecordsperpa geZ50QQsosortpropertyZ1

[ 01-09-2005, 05:17 PM: Message edited by: rbgarr ]

JimConlin
01-09-2005, 08:36 PM
A spruce pole for a boat of that size will be borderline unwieldy. I'd guess it'bd be about 14' in length. Hollow (birdmouth) construction will help.
It'll be a bother to maintain, too. I'd suggest that if you're willing to use carbon anywhere on your boat, it should be in the spin/whisker pole.

Jim Goodine
01-09-2005, 09:13 PM
Hi Noah. I made one for my cousin's boat but I don't know what length you'd need. We rigged the sail and measured what he'd need. It was about 11' or so, made of spruce.

I cut the bird's mouth sections for 2 1/2" diameter then to get the taper, I planed the strips on the flat edge. The ends finished at 1 1/2" diameter. Seemed very easy to do.

kc8pql
01-09-2005, 10:23 PM
Toplicht has some nice bronze pole fittings in several sizes. Dollar to Euro exchange rate isn't to good right now though. Toplicht (http://www.toplicht.de/)

[ 01-09-2005, 10:24 PM: Message edited by: kc8pql ]

Bill Perkins
01-10-2005, 07:53 AM
Noah have you seen the info on spinnaker poles in Skene's ?. A hollow square section is presented as most efficent for these spars . The author sees " no point " in a round section for these ( the square section is surprisingly efficent ).There's a sizing chart you might be able to adapt to your whisker pole , and section details . Construction , includeing taper , would be a breeze .

[ 01-10-2005, 07:57 AM: Message edited by: Bill Perkins ]

BillyBudd
01-10-2005, 08:37 AM
Hiya Noah! Making double tapered hollow masts are -- believe me, even I've done it -- a piece of cake. Check out WB mag #149 (July/Aug 1999) where you'll find an article called "Bird's Mouth Hollow Spars: Fast and Easy to Build." The article includes simple formulas, and blow by blow descriptions/photos of the process. This all started for me when I accidentally met the guys at a WB boat show years ago and they had me trot on over to the WB tent to buy the old mag. If you don't have the mag let me know--you'll need 5 pages, 31 - 36 incl. I couldn't believe that the tapers would happen, but...there they were!