[bolger] Re: Mast expense anxiety/birdsmouth masts

Clyde,
Greg Carlson has written a little program that calculates the stave
size for these birdsmouth masts. I think it's in the vault? Greg, whrer
are you?
djb

"Clyde S. Wisner" wrote:

> I tried one out of poplar but it was still quite a bit heavier than
> good lumber yard spruce, which replaced it. What about birds mouth,
> where you cut 8 strips, with birds mouth (90 degree vee) cut in one
> short side of each rectangle, and nest together, opposite short side
> of rect. in the birds mouth beside it, to make almost circular mast. I
> found this in John's Mother of All Maritime Links, and I've seen
> articles in MAIB and WoodenBoat. www.vcnet.com/~fhagan/bm./htm but I
> haven't tried one yet. I did try to make a sample with a molding head
> on a radial arm saw and found that one should not try to run short
> pieces of wood thru a molding head. They can come out like wooden
> bullets. Cheerful!, Clyde
>
> Peter Vanderwaart wrote:
>
>> Do I have this right? My surfing took me past www.boulterplywood.com
>>
>> and they are running a special on sitka spruce, e.g. 16' 2x6 @
>> $8/board
>> foot. My back-of-the envelope calculations (bear in mind that I
>> don't
>> have the mast design in front of me and don't know what I am doing
>> in
>> any event) suggest that the material for a Micro main mast would run
>> in
>> the area of $250.
>>
>> Hmmm. Does anyone have the bill of material for a Gougeon Brothers
>> wing
>> mast?
>>
>> Peter
>>
>> p.s. I'm trying to decide which species of tree in my backyard is
>> the
>> most likely candidate for harvest as mast material. Oak is too heavy
>>
>> and the trees are too large. The American Beech looks promising, but
>>
>> the wood is very heavy and it seems to rot quickly once the tree is
>> dead. The birches have no strength. I'll have to review my
>> inventory.
>>
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