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Response Marine, Inc.

25 High St.

Newburyport, MA  01950

Tel: 978-609-0525
Fax: 413-473-0390

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#338, 21' x 8', Deep V Twin Tunnel (DVTT)

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Lineage:

We describe this hull shape as a Deep V, Twin Tunnel  (DVTT).  It is a hybrid between a deep V hull and a tri-hull, with notable differences and details.  The center hull is more prominent (and deeper) than a tri-hull or cathedral hull.  While it carries about 20 degrees of transom deadrise the outer hulls, which are in a sense extra-large down turned chines, provide additional displacement and stability (decreasing draft and increasing load capacity) that would not exist in a typical V hull.  Further, there are nuances to the forward transitions that enable the hull to be dry, comfortable in a chop, and efficient due to trapped air.

 

The 21.3' hull pictured is a larger, deeper and more robust version of our 15.5-18.5' footers that were developed primarily as small fire/rescue boats.  This particular design kit was developed for a federal work and sampling application.  All of these DVTT hulls, which include an 18.7' (#293) and a 26' have been built by Viking Welding

Particulars:

Length (hull):

  Beam (hull):

Wt. as rigged:

Wt. Bare Hull:

Deadrise Angles- 

  Transom:

        Sta. 4:

  Cutwater:

21' - 4"

  8' - 0" (w/o rub rails)

3,577# (twin 115hp OB)

2,041# (w/ console)

     

22

23

63

Scantlings:

Bottom:

Bot. Stringers:

Chine Flats:

Sides:

Decks:

Transverse Frames:

Transom:

Keelson:

.190"

.190" Girder & 3" x .250"

.190"

.190"

.190"

.190", Flanged

.250" 

.250" x 3.7"

 

Stock Weight (approx.)-

                    Blank Plate: 5,579# (w/ console)

                       Extrusion: 404#