"Harry" wrote in message
m...
On 6/22/10 6:24 AM, W1TEF wrote:
On Mon, 21 Jun 2010 22:47:10 -0400, Wayne.B
wrote:

On Mon, 21 Jun 2010 22:24:27 -0400,
wrote:

The A-7 Polyform bouy holds 161.6 gallons of air which ~~ mumble -
mumble - carry the six, add four, times 12, price of tea in China ~~
works out to...24.8 something or other cubic feet? That right?

I'm getting about 20 cubic feet assuming 8 gallons per cube, or about
1200 pounds of buoyancy. That's a big-un, should do the trick if we
can get the chain to slip and have enough static engine thrust. Nice
solution if you've got the room for a big buoy like that. Any idea
what they cost, and what the deflated size is? A couple of them might
be useful as hurricane fenders.

http://www.polyformus.com/doc/product_a7.htm

My personal solution is to use a chain hook led to a 3,000 lb
Come-a-Long. I've tested it enough to know that it works but it would
take a while to bring up the anchor from 40 ft. The nice thing is
that Come-a-Longs are relatively cheap and don't take up a lot of
space. A multi-part block and tackle led to a chain hook or rolling
hitch should be workable also if you have enough mechanical advantage.

That was going to be my next solution. I've never had much luck
trying to snag a hunk of chain on the bottom though even at 40 feet. I
also thought we were talking deeper than 40 feet.

Mechanical advantage would be a good way. If you used two four rove
blocks in series - that works out to something like 35 lbs (I think).
You could hang the blocks off the boom - should be solid enough for 35
lbs.


Are you planning to tie an anti-gravity belt onto what you are trying to
lift with the boom? Whatever blocks you have attached to the boom, the
boom is going to "feel" the full weight of what is solely attached to it.
Of course, I was only an English major in college, not a hard-science
wizard like you...

Carry on.
Cassiday and I gave the answer around 9:05. Your English majoring helped you
to parrot the answer along with the addition of your usual snide remarks.
Carry on.

On Tue, 22 Jun 2010 06:24:55 -0400, W1TEF
wrote:

That was going to be my next solution. I've never had much luck
trying to snag a hunk of chain on the bottom though even at 40 feet. I
also thought we were talking deeper than 40 feet.

It doesn't really matter how deep the water is since you don't need to
snag the chain on the bottom. The idea is to grab the chain near the
bow roller with a chain hook or rolling hitch, then pull the chain
horizontally toward the rear of the boat using a mechanical advantage.
If you run out of purchase before the anchor is up, tie off the chain,
reset the hook near the bow roller, repeat as needed.

In article ,
says...

On Tue, 22 Jun 2010 06:24:55 -0400, W1TEF
wrote:

That was going to be my next solution. I've never had much luck
trying to snag a hunk of chain on the bottom though even at 40 feet. I
also thought we were talking deeper than 40 feet.

It doesn't really matter how deep the water is since you don't need to
snag the chain on the bottom. The idea is to grab the chain near the
bow roller with a chain hook or rolling hitch, then pull the chain
horizontally toward the rear of the boat using a mechanical advantage.
If you run out of purchase before the anchor is up, tie off the chain,
reset the hook near the bow roller, repeat as needed.

Never thought of front to back. Thought about it from side to side, but
thought it wouldn't give you enough leverage, but just didn't follow up
thinking front to back, I would have lost my anchor...


--
Rowdy Mouse Racing - We race for cheese!

On Mon, 21 Jun 2010 22:24:27 -0400, W1TEF
wrote:

The A-7 Polyform bouy holds 161.6 gallons of air which ~~ mumble -
mumble - carry the six, add four, times 12, price of tea in China ~~
works out to...24.8 something or other cubic feet? That right?

21.6 actually. Not a significant difference.

Casady