Saturday, March 3, 2012

Design 2711 - 90' Expedition Yacht

This robust expedition yacht was designed with a steel hull and aluminum superstructure. The result is a lot of boat in a reasonably sized package. The split level is a great solution. There are four guest staterooms with the forward two half a flight up. This allows a large pump and systems room under that space. The main deck is set up for entertaining. The galley and breakfast nook are up a half a flight of stairs and includes a day head and all are convenient to the wheelhouse.

That central staircase then proceeds up into the mock stack and offers protected access to the boat deck. There is also an external stair from the port side Portuguese bridge to the boat deck for handling the tenders. From the boat deck the flybridge is accessed by another half a flight of stairs. The flybridge is generous and set up with steering station and with entertainment in mind and includes a gas grill, wet bar and refrigerator.

Crew accommodations are for a captain and two hands and includes their own galley/laundry area, dining area and separate showers.

Power is provided by a single Caterpillar 3408C marine diesel generating 540 hp for a top speed of 12 knots and a cruising speed of 9 knots. Other features of the design include stabilizers, bilge keels, twin generators and a "get-home" system.

Here are the plans.

Principal Dimensions
LOA 90'-3"
LWL 82'-8"
Beam 22'-8"
Draft 6'-3"
Displacement 308,644 lbs


  1. This comment isn't about this boat but was inspired by it. I'm a sailboat fan, and a motor yacht like this has little appeal to me. However, your posts open whole new worlds of incredible boats with a wide variety of applications and consistently great and though provoking designs. I enjoy this blog, including posts like this, so much that I hope my next boat is a Sparkman and Stephens. I have an Allied Luders 33 and have been eyeing an Allied 42LX online for a while but in my dreams for the moment. Anyway, I wanted to say thank you and keep it up!

  2. I'm not a naval architect, but I was always told by famous sailors that the most seaworthy stern is a double ender. Modern boats like this, seem to me to have the opposite of a seaworthy stern, a stern indeed that looks designed to scoop a following sea onto the craft. It must be safe or designers would not use it. But I'd be interested to hear how it works in practice.