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Cranks per Foot

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frich
Captain

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USA
418 Posts

Initially Posted - 04/04/2002 : 12:54:32

Almost splash down here in NY, I am wondering if anyone has calculated how far the keel drops down for each turn on the crank?

I cant drop mine on the trailer, and with the shallow water on the south shore of Long Island I need some way of knowing how much water I am drawing, other than the abrupt stop<img src=icon_smile.gif border=0 align=middle>

Thanks

Frank Rich
84 C25 #4176

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dlucier
Master Marine Consultant

Members Avatar

Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 04/04/2002 : 13:17:36

You can probably get a good idea by turning the crank while watching the winch drum, then count the number of cranks per revolution of the drum. Next measure the circumference of the drum. Next, divide the drum circumference by the number of cranks for one drum revolution to get the inches per crank revolution. I think that's right. My head hurts! <img src=icon_smile_dissapprove.gif border=0 align=middle>

Don Lucier, Northstar
C25 SR/FK

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John Mason
Admiral

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USA
687 Posts

Response Posted - 04/04/2002 : 18:25:55

Couldn't you crank the keel all the way up, then put a piece of tape on the cable where it's just coming off the winch drum, then give the crank one turn (dropping the keel) and, with a little tension on the cable, measure the distance the tape has moved? Wouldn't that be the same distance that the keel would drop? But what do I know? I have a fixed keel. <img src=icon_smile_blush.gif border=0 align=middle>

John Mason - Ali Paroosa
1982 - FK/SR #3290

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Shelby
Navigator

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USA
155 Posts

Response Posted - 04/04/2002 : 19:53:00

Not that it will help to much, but I believe mine takes 27 cranks to go down.

Shelby on "Third S" '82 C25 #3208 SKSR

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dave holtgrave
Captain

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USA
427 Posts

Response Posted - 04/08/2002 : 10:51:59

i do 32 turns with the winch handle
i have a 1988 tall rig

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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 04/08/2002 : 11:42:35

Gee, my grandfather's Model T only took about 8 cranks.

Don Lucier, Northstar
C25 SR/FK

Edited by - on

IndyJim
Navigator

Members Avatar

USA
130 Posts

Response Posted - 04/15/2002 : 21:59:50

Hey Frank,

I just lowered my keel for the first time last Saturday. I don't have a clue how many turns it took. I was just elated to finally find the catch that released it! I stooped, crunched and squirmed to get an eyeball under there to find the release. After 3 months of getting her ready, I plum forgot to figure out how to release the darn thing. But after about 15 minutes afloat, voila!

This is not something you want to discover without a solid grip and tension on the crank! That is one heavy sucker! At least that dreaded hard "clunk" didn't happen. When I crank her up, I'll count the revolutions!

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rclift
Navigator

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USA
152 Posts

Response Posted - 04/15/2002 : 22:50:10

Jim, your description of lowering the swing keel sounds suspicious. Are you sure you have the right winch? Normally, the lowering process is quite gentle with easily controllable tension on the cable and there is nothing to release. You simply begin to crank in a counter clockwise motion. There is a clutch mechanism within the winch that constantly releases and grips as the keel is lowered. Sounds like you may have some sort of trailer winch which would be extremely dangerous in this application.

Ray Clift, Buzz 1361

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Champipple
Master Marine Consultant

Members Avatar

USA
6855 Posts

Response Posted - 04/16/2002 : 11:15:07

31 Cranks up....31 cranks down..

8 cranks up to get over that damn bump in the road in channel near our slip.

dw

Duane Wolff
"The Flying Wasp"
C-25, #401 std,sk
Chief Measurer C-25/250 national Org.
<img src="http://im1.shutterfly.com/procserv/47b2dc20b3127cce9cd2f45b211a0000004010" border=0>

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Todd Frye
Navigator

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USA
222 Posts

Response Posted - 04/16/2002 : 12:12:15

Jim,
When I first purchased my 86 SK, the previous owner took me through the steps of lowering the keel. It seemed pretty unorthadox...you had to reach under the step and hold the ratchet pawl away from the drum while lowering that heavy keel with your other free arm. Although I got the hang of it, I had my reservations. Once we put boaty in home waters, we started taking friends out on the water.Taking advise from this board...and it is good advise, I began delegating duties."Lowering the keel" became my life long buddies job, which he completed successfully 2 or 3 times, until the crank handle slipped off the winch shaft and the keel free fell for a few feet with the resulting horrifying clunk. My first concern was that his finger might have been caught in the spinning drum.The second was if the bottom of the boat was still attached.I took the the boat out of the water for an inspection and although I found no damage, replaced everything. New self braking winch, cable, pin and clevis. All for under $170. Pretty cheap for peace of mind and a much better system.

Our Marina has a 1" bar, 4'below the surface to keep the ends of the dock from moving. I crank my keel up 25 revolutions to clear the bar. Todd Frye

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Champipple
Master Marine Consultant

Members Avatar

USA
6855 Posts

Response Posted - 04/17/2002 : 13:32:50

<BLOCKQUOTE id=quote><font size=1 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>
Our Marina has a 1" bar, 4'below the surface to keep the ends of the dock from moving. I crank my keel up 25 revolutions to clear the bar. Todd Frye
<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>

Most marinas just drive posts into the ground...That one inch bar seems mighty odd? Are you inland, ocean or Lake erie?

Duane Wolff
"The Flying Wasp"
C-25, #401 std,sk
Chief Measurer C-25/250 national Org.
<img src="http://im1.shutterfly.com/procserv/47b2dc20b3127cce9cd2f45b211a0000004010" border=0>

Edited by - on

Todd Frye
Navigator

Members Avatar

USA
222 Posts

Response Posted - 04/17/2002 : 18:15:22

Duane,
I am located on Utah Lake, the last remnant (along with the Great Salt Lake) of a pre-historic inland ocean, which is 13 miles long, 6 miles wide and 12 feet deep. I first started sailing here on a 22 foot Catalina (in a 4 way partnership). One of the partners who was relentless in his pursuit of the Darwin Award, returned to the courtesy dock too fast and in an attempt to slow the boat down, jumped off the bow to put himself between the boat and dock. This is when he discovered the 1" bar, 4 feet below the waters surface. The main dock is supported by 4" pipe, driven into the bed of the harbor, but the ends of each slip are connected underwater with the 1" bars. Todd Frye

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IndyJim
Navigator

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USA
130 Posts

Response Posted - 04/21/2002 : 01:03:38

Todd,
Thanks for not making me feel stupid. I don't have any trailer winch as one contributor inquired, its just one of those nylon things exactly like you described. Maybe in the earlier/later models, they improved the system but mine is the original, or at least it matches what's in my manual.

I'm just glad you knew what I was talking about. And I sure wouldn't want to crank it up just to get in my slip like you have to. Do you lift weights all winter so you'll be prepared in the spring? ha ha ha

Thanks everybody. You sure do help a new C-25 guy on this site!
I'm loving my new C-25 baby!

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