CD28 Boom Vang

[Mike Little]

My CD28 doesn't have a boom vang. I guess a boom vang wasn't standard equipment on CD28's new from the factory. Has anyone added a boom vang to their CD28? If so, does it significantly improve sail shape and sailing performance? It seems that since the main sheet is rigged from the aft end of the main boom to the traveler, sail shape would wouldn't be a big issue as a rig where the vang is rigged mid-way down the boom. What is the experience of other CD28 owners? Thanks in advance for any info...

Mike
CD28 "Valhalla" (#359)



M.Little@telops.gte.com

[Dana Arenius]

My CD28 doesn't have a boom vang. I guess a boom vang wasn't standard equipment on CD28's new from the factory. Has anyone added a boom vang to their CD28? If so, does it significantly improve sail shape and sailing performance? It seems that since the main sheet is rigged from the aft end of the main boom to the traveler, sail shape would wouldn't be a big issue as a rig where the vang is rigged mid-way down the boom. What is the experience of other CD28 owners? Thanks in advance for any info...

Mike

____________________________________________________________________

Mike,

Where the design of the boat has a adjustable mainsheet traveler(which transverses across the majority of the beam of the boat) a boom vang would only duplicate the sail shape controls you already have when sailing to windward.

But when sailing off the wind, the use of the mainsheet traveler to control the lift of the boom will be lost. That's when a boom vang can help control the shape. It can help in the boom lift control (flattening the sail)and also can serve as a accidental jibe "preventer" when sailing downwind if the foot of the vang is fitted with a snap shackle so it can be moved from the base of the mast to a padeye near the toe rail.

Dana



darenius@aol.com

[Tom Young]

My CD 28 has the traveler mounted on the after deck. The CD 28's mainsail is good sized (200 sq. ft. +), it really helps the boat off the wind but the traveler becomes less effective as the boom moves to leeward. The vang really helps at this point and as Dana suggests as a preventer it is invaluable, I just clip the shackle(vang) to the base of the stantion. Never trust anything, stantion, pad eye, sanp shackle when it comes to hitting you in the head, but it works. Tom



thrumcap 3 @ aol.com

[chuck yahrling]

My CD28 doesn't have a boom vang. I guess a boom vang wasn't standard equipment on CD28's new from the factory. Has anyone added a boom vang to their CD28? If so, does it significantly improve sail shape and sailing performance? It seems that since the main sheet is rigged from the aft end of the main boom to the traveler, sail shape would wouldn't be a big issue as a rig where the vang is rigged mid-way down the boom. What is the experience of other CD28 owners? Thanks in advance for any info...

Mike

Guys:

Wanted to jump in on this thread - attn Dana:

I want to go with a vang on my CD27, but was wondering whether the angle might be too acute to be useful (this might explain why nobody installed one before). That is, there's only a 2.5-3.0 feet between mast step and gooseneck, so to get a good downhaul moment I'd have to keep the boom bail pretty close in. I'd like to get it halfway out the boom, but that's going to give me a shallow downward angle.

Dana: I'm thinking the '26 and '27 are pretty close in the rigging dept., so I want to hear about your setup i.e. what is placement, bail size (gauge) what tackle etc. do you use?

____________________________________________________________________

Mike,

Where the design of the boat has a adjustable mainsheet traveler(which transverses across the majority of the beam of the boat) a boom vang would only duplicate the sail shape controls you already have when sailing to windward.

But when sailing off the wind, the use of the mainsheet traveler to control the lift of the boom will be lost. That's when a boom vang can help control the shape. It can help in the boom lift control (flattening the sail)and also can serve as a accidental jibe "preventer" when sailing downwind if the foot of the vang is fitted with a snap shackle so it can be moved from the base of the mast to a padeye near the toe rail.

Dana

yahrling@cybertours.com

[Dana Arenius]

I use a 3/8" diameter bail which has a mounting "spread" of approximately 3-3/4" between the the bail ends. The bail end holes are 5/16". I use a single SS bolt straight thru the boom or mast.
No sleeving. I cap the bolt with a standard self locking SS cap nut.

For the most part, most mast base distances are only 2-1/2' to 3' to the boom. Mine is about that. My boom bail is about 3-1/2 feet back aft of the mast. The mast boom is only 3-4" above the base. My boom is 11' long but the last 6-7" of it is "sail-less" and the rig on the CD26 is identical to that of the CD25D. It should be similiar in the case of the 27.

A bail position of half way back on the boom (when taking the vang from the mast base is too far) for my boom length. You are correct in stating that purchasing power would be lost. It is an angle other than vertical so that the purchasing power will diminish the further aft the boom baiI is. If you take a look at the center of effort for the main sail, you will probably find that it is not at a distance of 50% aft along the boom. The deepest sail camber usually is about 40% aft.

I recommend that AT LEAST a 4/1 purchase be used. A larger purchase will work much better, especially to windward. I use 3/8 diameter line. Offwind, I find the purchase power to be fine when I switch the snap shackle over to the toe rail. The purchase is then more vertical and more power is available. In close haul, I could use a little more power.

Dana



darenius@aol.com

[Bill Slater]

My CD28 doesn't have a boom vang.

Mike

I dont remember who sent me this info, but I have a sheet of paper from Spartan Marine that provides all the measurements for 99% of the Cape Dorys and the material needed to install boom vangs (to include part numbers).

On the 28, the bail is mounted 4" above the base of the mast, and on the boom it is mounted 4' 0" aft of the goosneck (measured from where the boom spar ends and the cast aluminun(sp) fitting begins. The boom bail uses a 3/8 x 3 1/2 hxhd and the mast bail uses a 3/8 x 4 3/4 hxhd bolts. The Spartan part numbers for the bails are 90-07 (mast) and 90-09 Boom.

If any one esle would like to see this info, if I can get it scanned I'll try to figure out a way to make it accesable. If anyone knows how to put it on the net, let me know, and I'll try to get it done.

Fair Winds and hope for spring.

Bill
S/V Rhapsody
CD 25D #148



willie@clnk.com

[Jerry]

.
On the 28, the bail is mounted 4" above the base of the mast,

Regarding mounting the bail on the mast, there is an option you might want to consider. For my CD 30 with a deck-stepped mast, I purchased a SS plate that mounts under the mast shoe. The plate is 1/4 inch thick and comes in 3 sizes. When mounted, the plate extends about 2 inches out from under the mast in all directions, then turns up about another inch, and has holes along all 4 sides for connecting various gear. I connect my boom vang to the front of this plate which improves the angle (and purchase) of the vang, and I also connect my halyards to the plate when not in use, rather than to the life lines. If ever I get around to running all my lines aft to the cockpit, the plate will come in handy for connecting turning blocks at the base of the mast. Perhaps one of the greatest advantages of the plate is it is one less hole you have to put in the mast (too many holes can weaken the mast). I've had the plate on for several years now and I've found it to be very strong and quite usefull. If you've looked at any new boats, many of them come with this plate already installed. Anyway, just another opinion.

[chuck yahrling]

.
On the 28, the bail is mounted 4" above the base of the mast,

Regarding mounting the bail on the mast, there is an option you might want to consider. For my CD 30 with a deck-stepped mast, I purchased a SS plate that mounts under the mast shoe. The plate is 1/4 inch thick and comes in 3 sizes. When mounted, the plate extends about 2 inches out from under the mast in all directions, then turns up about another inch, and has holes along all 4 sides for connecting various gear. I connect my boom vang to the front of this plate which improves the angle (and purchase) of the vang, and I also connect my halyards to the plate when not in use, rather than to the life lines. If ever I get around to running all my lines aft to the cockpit, the plate will come in handy for connecting turning blocks at the base of the mast. Perhaps one of the greatest advantages of the plate is it is one less hole you have to put in the mast (too many holes can weaken the mast). I've had the plate on for several years now and I've found it to be very strong and quite usefull. If you've looked at any new boats, many of them come with this plate already installed. Anyway, just another opinion.

Sounds good; where did you find this gadget?



yahrling@cybertours.com

[Bill]

If you've looked at any new boats, many of them come with this plate already installed. Anyway, just another opinion.

Sounds good; where did you find this gadget?

Chris

I too would be interested on a plate uder the mast shoe. Mboat is a CD25D. Any idea where to get them and how much?

Bill



willie@clnk.com

[Jerry]

.
On the 28, the bail is mounted 4" above the base of the mast,

Regarding mounting the bail on the mast, there is an option you might want to consider. For my CD 30 with a deck-stepped mast, I purchased a SS plate that mounts under the mast shoe. The plate is 1/4 inch thick and comes in 3 sizes. When mounted, the plate extends about 2 inches out from under the mast in all directions, then turns up about another inch, and has holes along all 4 sides for connecting various gear. I connect my boom vang to the front of this plate which improves the angle (and purchase) of the vang, and I also connect my halyards to the plate when not in use, rather than to the life lines. If ever I get around to running all my lines aft to the cockpit, the plate will come in handy for connecting turning blocks at the base of the mast. Perhaps one of the greatest advantages of the plate is it is one less hole you have to put in the mast (too many holes can weaken the mast). I've had the plate on for several years now and I've found it to be very strong and quite usefull. If you've looked at any new boats, many of them come with this plate already installed. Anyway, just another opinion.

Sounds good; where did you find this gadget?

I've only seen this plate sold by the M&E Marine Supply Company in Camden, NJ. Call 800-541-6501 or 609-541-6500 for a current catalogue. As I recall, the plate costs about $35 for the large size.

[Jerry]

If you've looked at any new boats, many of them come with this plate already installed. Anyway, just another opinion.

Sounds good; where did you find this gadget?

Chris

I too would be interested on a plate uder the mast shoe. Mboat is a CD25D. Any idea where to get them and how much?

Bill

The plate is available from M&E Marine Supply Company, POBox 601, Camden, NJ 08101. Phone 800-541-6501 for orders, or 609-541-6500 for customer service. Ask for one of their catalogues. The plates come in 3 sizes, based on the dimensions of the mast. Prices range around $28 to $35 for the largest size.

To install the plate, just unbolt the mast shoe and slip the plate underneath. You will probably need to drill holes in the plate to match those in the mast shoe. Put a gasket of some sort between the plate and the mast shoe to avoid potential problems with dis-similiar metals and rebolt the mast shoe to the deck, thru the plate.

[David B. Brownlee]

I want to go with a vang on my CD27, but was wondering whether the angle might be too acute to be useful (this might explain why nobody installed one before).

Our CD27 has a very effective boomvang, using the two bail system described for the CD28. The vang is made up with snap shackles at each end, allowing us to rig it as a preventer, as Dana describes. (We take the lower end down to the base of a lifeline stanchion. Someday I mean to put a pad-eye in *exactly* the right place.) It is very useful in that mode when running in heavy weather.

David Brownlee
CD27 "Windrush"
Havre de Grace, MD



dbrownle@mail.sas.upenn.edu

[Chia Xiong]

Can you tell me what Boom Vang27 is? Thanks


Chia Xiong



thia_x@hotmail.com