B27 Technical Information


Description

The Bristol 27 is a 27-foot monohull, aft-cockpit, fiberglass, mast-head sloop sailboat. Designed by the renowned naval architect Carl Alberg and produced by Bristol Yachts of Bristol, Rhode Island, USA, 337 yachts were produced from 1966 to 1978. Three different models were produced: Standard (Cruising), Dinette, Weekender.

 

Technical Diagrams

Line Drawing (Cruising Model)

Line Drawing (Weekender Model)

Sail Plan

(http://www.bristolowners.org)

Sales Brochure

Custom quality! For a reasonable price, the Bristol-27 provides a quality hull filled with excellent features and workmanship. The proven reliability of both designer and builder makes it a lasting value. She’s roomy! She’s fast! She’s a good heavy weather performer! She’s a boat we are proud to place against any kind of competition. We feel she’s an “inside and out” bargain. Pick the version that best suits your needs … and compare! Hand lay up construction and full length keel with attached rudder provides strength and sailing stability.

Fall in love! The best way to judge a boat is to sail it, to live in it, to own it over a period of time. This isn’t always possible to do before you buy, but you certainly can ask other owners what they think. Ask them what they think of the Bristol styling inside. Ask them about the quality of materials and workmanship. Maybe you could turn on the charm and ask them for a ride.

If you fall in love with it … great! You’re on your way to sailing satisfaction!  Note: inboard power available. Check the long list of optional equipment and tailor this mini-yacht to taste.

Original Equipment
Hull & Deck:
Features of opening hull mold:
Cruising Model:
Dinette Model:
Cockpit:
Deck Hardware:
Interior:
Engine:
Electrical System:
Tanks:
Spars & Rigging:
Colors:

Questions


+ Where is the hull number on a Bristol 27?
– – If you want to find your Bristol 27’s hull number and year built, you might be able to check the hull topsides near the transom.  I found mine far aft on the starboard side.  Below are some photos of mine:

Here's the hull number itself. In plain English, my guess it reads 'Bristol Yachts 27. Hull #370. Built on (?) 09/1975

Here’s the hull number itself. In plain English, my guess it reads ‘Bristol Yachts 27. Hull #370. Built on (?) 09/1975

See the top left of the hull, you can see the imprint area.

See the top left of the hull, you can see the imprint area.

Another location to find the hull number on your Bristol 27 may be on or in the electrical panel.  Here’s an image of my Bristol 27’s original panelboard as well as Loki’s, which shows the hull number for each boat:

Note the hull number marked on these two Bristol 27 electric panels. One was written on the back in permanent marker (Hull #370) and the other was imprinted right on the front (Hull #37).

Another location to find the hull number of a Bristol 27 may be on the sail.  For example, here’s an image of Hull #2 – Sweet Pea, Hull #177 – Harbor Duck & Hull #335 – Winter Dream:

Hull numbers shown on the sails of Bristol 27 sailboats.

Another location to find the hull number may be plaque installed on the boat.  Hull #289 found their plaque mounted on the forward portion on outboard engine well, just behind the rudder post, easily visible in the cockpit.  Here’s an image of that plaque:


+ Are there any design changes within the same Bristol 27 model?
-> 8/1/2018 – Production model sailboats like the Bristol 27 may go through design changes as they’re produced through the years.

Currently, bristol27.com knows of no major design changes (e.g. hull shape, length, weight, etc.) that occurred within the same Bristol 27 model.  There are major design changes between the Bristol 27 models Cruising, Dinette and Weekender, but this question will specifically focus on changes within the same model.  For information about differences between different models, please review the above images and text.  Also keep in mind that this question isn’t fully answered and not all design changes are listed here, since it’s not easy to clearly define design changes across a wide set of old production boats.

One known design change is on the Cruising model, and relates to the exterior icebox hatch.  This design change was first noticed by Noel, from Bristol 27 Hull #2 – Sweet Pea.

Cruising model Bristol 27 sailboats have a somewhat uncommon design feature – the icebox is accessible from both inside and outside the boat.  Their icebox is built higher on the freeboard, directly under deck.  A hole is cut through the deck in the forward edge of the starboard cockpit seat which gives access to the icebox’s interior.  This hole hole is covered and protected by a hatch (aka “exterior icebox hatch”).

Some Cruising model exterior icebox hatches are installed flush with the cockpit seat and a flange built below deck.  Other Bristol 27 Cruising model hatches were installed raised above the cockpit seat, with a flange built onto the deck and a hatch with sides.  The exact hull # where this model’s design change occurred isn’t known.  The first known instance of a flush hatch is hull #2 and first known instance of a raised flange hatch is hull #100.  In other words, it currently seems Cruising model hull #’s 0 – 100 have the flush exterior icebox hatches, while hulls #101+ have a raised hatches.

Exact reasons for this hatch’s design change isn’t known.  Likely the change was to reduce chance of water ingress, since a raised flange is more waterproof.  One downside of this design change is that a raised flange presents a tripping hazard and somewhat blocks a good seating spot for crew.  Generally, this hatch isn’t very seaworthy, as it’s installed far outboard on the boat and the hatches weren’t designed to be battened down.  Also, adding a second hatch to the icebox makes it inefficient.  Over time, many Bristol 27 owners permanently sealed off exterior icebox hatches due to these concerns.

For a visual of this design change on the Cruising models, please see the following image comparing flush vs. raised cockpit seat hatches:

Some Cruising model exterior icebox hatches are installed flush with the cockpit seat and a flange built below deck (left).  Other Bristol 27 Cruising model hatches were installed raised above the cockpit seat, with a flange built onto the deck and a hatch with sides (right).

Another known difference between some Cruising models is the rudder core.  Hull #002 has a wood rudder core, whereas hull #370 has a fiberglass rudder core.  It’s not clear when or why this change occurred.  It could be because a change was made by the manufacturer over the years.  Or, perhaps the type of motor the boat has an impact on the rudder core material. since hull #370 was powered with an inboard and requires a cut-out for the propeller while hull #002 was an outboard motor in a well.

 

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25 Responses to B27 Technical Information


  1. Just purchased 27′ Cruising Model 9-15-11. It is moored in Florida where I plan to cruise here this winter. Anyone know the bridge clearance heigth of the mast?

    Submitted by: ed cullom on October 13, 2011 at 11:08 am

    Reply
    • Hi Ed – good question. I don’t have a definite answer for you, but I believe the mast to be around 37′ + freeboard (~4′?). I would think crossing under a 45 foot bridge or above you should be fine, but if you end up measuring this yourself please let me know and I can add this data to the site.

      Submitted by: Andrew on October 13, 2011 at 2:39 pm

      Reply
      • I just bought a 1969 Bristol 27 Weekender. Hull number 50 (it’s on the sail, anyway). I can’t find a serial number or other manufacturer’s id plate anywhere aboard. I took out the outboard engine and fuel tanks, and stuck my head in the lazarette, and still nothing. Hints?

        By the way: an old Boy Scout trick is to step back with a pencil or ruler held at arm’s length, project the height of the mast to a length on the pencil, and rotate that distance to a horizontal surface the same distance away as the boat, and have someone place markers. Then measure along the ground between the markers. Much easier than climbing the mast… or taking it down.

        Submitted by: Clint on January 30, 2012 at 2:06 pm

        Reply
        • Isn’t the SN on the title? I think ’69 was before the SN was required by the USCG. I remember reading that the pearson brothers were bad about that…

          Submitted by: jason sattler on February 21, 2012 at 7:15 pm

          Reply
      • I have a 1966 and in the 33 years I have owned her I STILL haven’t found a hull number 🙂 I was told to use the sail number (#82) and that has served me well over all these years.

        Blessings, Dean

        Submitted by: Dean Aschenbrenner on May 17, 2012 at 4:54 pm

        Reply
        • I was told that the numbers were on the port side all the way astern. On the top edge. That is when I remembered it needing extra sanding there as I prepped it for paint. It’s #42B

          Submitted by: Randal on June 25, 2013 at 8:58 pm

          Reply
          • To assist, I added photos and a description of how I found my hull number in the ‘Questions’ section above.

            Submitted by: Andrew on June 26, 2013 at 10:44 am

    • The Mast on the Bristol 27 is 31′ 9″ and it sits about 4′ off the water. I just got mine under a 36 foot bridge clearance. I have a 2 foot antenna and just touched (that will make you pucker). I hope this helps. I like the boy scout trick.

      Submitted by: Mark Doyle on May 17, 2016 at 10:38 am

      Reply
  2. I have a brand new, never been used set of cushions I would like to sell that were custom made for a 1966 Bristol B27 weekender. If interested please send me an email.
    Cheers

    Submitted by: Dan Bruce on April 16, 2012 at 12:56 pm

    Reply
    • My partner and I have just undertaken a “rescue” 27 Bristol….are these cushions still available. We are in Manhattan…79th st boat basin…thank you Dan

      Submitted by: Krista Kaufman on June 12, 2012 at 4:07 am

      Reply
      • Hi, sorry for the delayed response, yes they are still available. If you send me your email address I will send you pictures. They are brand new, never been used and have been stored on shore in conditioned space. My Bristol got severely damaged in a storm and I never got a chance to use them.
        I can be reached @ 919-448-6381 or 919-933-5572
        Dan

        Submitted by: Dan Bruce on June 13, 2012 at 11:17 am

        Reply
    • Dan, i might be interested in the set of cushions. could you email me please? thanks
      brozsek@yahoo.com

      Submitted by: bela on June 12, 2012 at 7:08 am

      Reply
      • Bela and Krista,

        I’ve e-mailed Dan for you regarding the cushions. I hope he reaches out to you and you can make arrangements.

        Good luck,
        Andrew

        Submitted by: Andrew on June 13, 2012 at 10:58 am

        Reply
      • Hi, sorry for the delayed response, yes they are still available. If you send me your email address I will send you pictures. They are brand new, never been used and have been stored on shore in conditioned space. My Bristol got severely damaged in a storm and I never got a chance to use them.
        I can be reached @ 919-448-6381 or 919-933-5572
        Dan

        Submitted by: Dan Bruce on June 13, 2012 at 11:18 am

        Reply
  3. i have to re do my deck. I have a 1968 Bristol dinette. Any technical help in doing this would be extremely helpful. Also i’m trying to locate a book on my sailboat.

    thanks,

    dave

    Submitted by: david sheets on December 24, 2012 at 12:19 pm

    Reply
  4. i have to re do my deck. I have a 27 foot 1968 Bristol dinette. Any technical help in doing this would be extremely helpful. Also i’m trying to locate a book on my sailboat.

    thanks,

    dave

    Submitted by: david sheets on December 24, 2012 at 12:22 pm

    Reply
  5. I purchased a 1965 Bristol 27 (no hull number that I can find). She is beautiful but requires a lot of work, as she was abused and neglected, so I am in the process of refurbishment. I am looking for an electrical wiring schematic. Does anyone know if one might exist somewhere?

    Thank you,

    Dennis–

    Submitted by: Dennis on December 27, 2012 at 9:50 am

    Reply
  6. Thanks for both your comments Dave and Dennis.

    @ Dave – Not sure what book you might be looking for, but here are a couple good sources for deck recores:

    * http://www.lackeysailing.com/angelina/march11/31411.htm (press ‘next’ at the bottom of each page to see the repair progress)
    * http://www.triton381.com/projects/restoration/recore.html

    @ Dennis – I’m sorry, not aware of any wiring schematics at this time. I would be interested to see one as well, but if you are doing a big rebuild, it might be worth planning out a whole new wiring set-up. I suggest this, because at least in my B27, the wires ran between the deck and headliner and were inaccessible, plus you may have different wiring needs than the original set-up.

    Submitted by: Andrew on December 27, 2012 at 12:27 pm

    Reply
  7. Great site.
    Do you happen to know where the first picture of the B27 lying on its side was taken?

    Submitted by: Netanel2b on October 16, 2013 at 9:24 am

    Reply
  8. Sorry Netanel, I’m not sure the source or story behind that image.

    Submitted by: Andrew on October 16, 2013 at 4:47 pm

    Reply
  9. Just purchased #345 on Lake Ontario, with what appears to be an original Bukh 10 hp diesel. Anyone know what the gearing ratio is on this? Looking to re-prop her.

    Submitted by: Mike on April 29, 2016 at 5:18 pm

    Reply
    • Hi Mike,

      Thank you for your comment. I’m not sure if the other Bristol 27 owners monitor this page as much. Good news is, I think I can give you a good contact.

      When I was looking at Beta motors, they work with a preferred propeller company that offered me assistance when I was looking for a propeller. If you gave them a call, I’m sure they’d be able to advise. Here’s their contact information:

      General Propeller Company
      800-313-6025
      1410 8th Avenue East
      Bradenton, FL 34208

      Submitted by: Andrew on May 2, 2016 at 2:09 pm

      Reply
      • thanks for the response! I’ll look into them.

        Submitted by: Mike on May 23, 2017 at 12:16 pm

        Reply
  10. Hello,
    Have a bit of a conundrum. I can’t find a hull number anywhere on Sweet Pea. She is definitely a 1966 hull & both of her main sails are #27 (original & newer). I see that there is a hull 27 on the site already, so I’m not quite sure where else I can find out her hull number. I will submit pics to Andrew as soon as I can. Any help would be greatly appreciated.
    Cheers,
    Noel

    Submitted by: Noel Sperry on July 14, 2018 at 9:07 am

    Reply
    • Hey Noel,

      Thanks for your question. Since you weren’t able to find a hull number stamped onto Sweet Pea, I did a bit more sleuthing as to how to find the hull number. Somehow, came up with a new option for finding it, which is on the electric panel.

      Could you check on the electric panel of your Bristol 27? Somewhere on there, I’m hoping you’ll see some type of number that is the hull number. I added two examples of hull numbers found on Bristol 27’s in this question above – http://www.bristol27.com/bristol-specific/b27-technical-information#hull-number

      Let me know if you find anything,
      Andrew

      Submitted by: Andrew on July 15, 2018 at 7:47 pm

      Reply

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