of booms and crutches
-----Original Message-----
From: Wayfarer [Ton Jaspers]
Sent: woensdag 18 februari 2009 21:20
To: John Eardley
Subject: boom crutch design for Boom Tents made by The Canvas Windmill

Hi John,

I have made this crutch for my Plus-S. The crutch is in the boat at the moment and I can't get at it. I'll try to take some pictures next time I am with my boat. 

I made a cavity for the bridle sheaves (racing stuff) which are located at the inboard side of the transom, near the top, and exactly in the spot where the crutch legs need to pass. Because the cavity weakened the structure, I doubled the lower 5 inches of the legs. This made it fit the shape of the gutter even better. It now stays up in any condition while the original design had a tendency to fall forward if there was some wind or if the boat was tilted too much on the trolley. This is quite an ordeal if you try to get the mast down single-handed in less then three attempts. And that is all I will say about it, I am sure you have the mental picture.......

The measures are approximate. I finished the crutch by hand. I fitted, filed, fitted, filed, sanded, and fitted again until there was a tight fit in the gutter with the little "hooks" under the gunwale. A tight fit ensures the crutch stays up by itself. This is not really needed for a boom tent but it is a nice feature if you are single-handed. Also, a tight fit spreads the load over a larger area.

Best wishes,
Ton Jaspers
(W10445 - Swiebertje)

(Al's note: The JPEG below was taken from an even better quality PDF file which you can access here.)

----- Original Message -----
Sent: Friday, November 21, 2003 7:31 AM
Subject: Boom Crutch

Uncle Al:

A friend of mine, and the only other Georgia Wayfarer, is looking for a pattern for a boom crutch.  Do you know where he can get one?  I am still looking for a boom tent and may need to make a crutch some day too.  Let me know and I will pass along the information.

Thanks a million!

Wind, water, and Wayfarers,

Bill Waller (W923)
Albany, GA

On Fri, 21 Nov 2003 09:13:42 -0500 "Al Schonborn" <uncle-al@cogeco.ca> writes:

Hi, Bill:
Speak of the devil - I just had an e-mail from Ton Jaspers in Holland who is sort of collecting pictures of "weird" Wayfarers for me to publish in the Weekly Whiffle, and he found dear old W923 in an old "issue". I'll forward his note to you. I have had trouble getting through to you last time so will try again and otherwise go to my hotmail address.
Regarding boom crutches, I will copy Dick Harrington who is good at this kind of thing for his cruising endeavours and wood work in general (unlike me!!). Subject to Dick's corrections, I would suggest that most boom crutches I've seen lately were made from an old hockey stick or two bolted together about 2-3" from one end. The "legs" of the boom crutch will stand on the back tank against the transom and will be kept from "doing the splits" by the side decks. I expect it's then simply a matter of measuring the distance between your centred boom at the correct elevation for your cover and the aft corner of the outer surface of your aft tank - leaving a little extra if you intend to angle-cut the "feet" so they sit flat on the aft tank. The part above the bolt wants to be quite short and likely faired such that it won't dig into your cover or boom tent?
Hope you had a good sailing summer and are still doing a bit of sailing now??? Best to your family and especially the pirate!!
Uncle Al (W3854)

----- Original Message -----
Sent: Friday, November 21, 2003 8:05 PM
Subject: Boom Crutch

Hi Bill & Al,
Attached is a photo of my boom crutch in use.  In the past I've made several for others which were similar in design.  If you want the rough dimensions and the shape of the top end I can send it as well as do a trace for you. 

There is nothing magical however.  The one thing Al didn't mention is putting a large pan washer in between the two sticks so that they don't bind.  Also, I put a piece of rubberized non-skid strip (the 1" wide self adhesive stuff you place on the floor boards) on the bottom of each stick to keep it from marring the deck.  You will notice that there is a small raised boss (or usually a recess on FRP boats) on the aft compartment deck near the transom and side decks which is there specifically to receive a scissors style boom crutch.  You may need to trim the thickness of bottom outside edges of the sticks so that they fit into the recess.  
Best wishes---DICK

On Sun, 23 Nov 2003 14:58:06 -0500 "Al Schonborn" <uncle-al@cogeco.ca> writes:
Hi again, Bill:
Have run out of room in this week's Whiffle, so will wait for Dick to provide dimensions - hopefully in time for next week???
Uncle Al (W3854)

----- Original Message -----
Sent: Monday, November 24, 2003 1:28 PM
Subject: boom crutch dimensions

Bill & Al,
As requested, attached is a drawing of my boom crutch which can be used for what ever purposes you wish. ...  You will probably need to perform some final trimming, which means having access to the boat and boom at the last test stage.  This pattern only works with the older style round (Proctor) boom.  If you have something that's different, check the measurement first. 

When I've made this boom crutch for friends I've used whatever material I had handy in my shop (cherry/walnut, etc.!), but no hockey sticks.  (I think hockey sticks are often made of maple, which is not a good wood for exposure to wetness.)  The width and thickness has varied some from that shown in the drawing.  If you follow the pattern using the 2-5/32" (2-1/8 plus) diameter for your boom you can compensate for differences in the material width.
Best wishes---DICK