Mail only: 

Response Marine, Inc.

25 High St.

Newburyport, MA  01950

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

Response Marine, Inc., 2019 © 2023 by Direct Automotives. Proudly created with Wix.com

#336- 20.2' x 7'  Flat Bottom 

Main Views (pdf)
Study Dwgs & Lists (pdf)
Show More

Lineage:

This 20' flat bottomed, hull design has been built by Chester Boatworks and is a derivation of our design #300.  This kit is 1' skinnier and has the transom sculpted to provide for forward mounting of the engine.  Unlike similar engine-forward designs the hull outboard of fthe engines is not carried to the hull bottom, and as a result this design lessens the flooding issues associated with similar engine pod designs when backing down or in a following chop.   

 

It is constructed entirely of 1/4" plate, though 3/16" is available as a substitute.  As with most of our flat-bottomed landing craft the bottom has 3" x 1 1/2" (deep) channels running fore and aft along the bottom.  These channels provide panel stiffening and protection, but they also improve tracking and efficiency- the latter by virtue of trapping air between the channels at speed. 

The NC cutting kit is available with or without a fuel tank, helm console and leaning post, and of course custom design kits with any degree of changes are available. 

Particulars:

Length (hull):

  Beam (hull):

Wt. as rigged:

Wt. Bare Hull:

 

Deadrise Angles- 

  

20' - 2"

  7' - 0" (w/o rub rails)

2,714# (115 hp outboard)

2,187# 

 Flat Bottom    

Scantlings:

Bottom:

Bot. Stringers:

Sides:

Side Stringers:

Decks:

Transverse Frames:

Transom:

.250" w/ 3"x1.5" Channels

.250" Girders, flanged  

.250"

.250" Shelf & 3"x.250" 

.250"

.250", flanged

.250"    

Stock Weight (approx.)-

    Blank Plate: 2,300# (hull)

    Extrusion: 328#