Cartopper is11’6” by 4’ (3.5m by 1.2m), double chine with a bottom 2’ (61mm) wide…loaded (one person) water line width is about 3’ (91mm). She is built with taped seams from 4 sheets of plywood and weighs approximately 90 pounds (40.1 kg) as designed. Oars are 8' (2.4m) long.
This photo shows the floorboards in two sections so they can be removed from the sleeping compartment/cockpit that is approximately 7' (2.1m) long (between waterproof bulkheads located where frames 1 and 3 are in the plans), with the cockpit opening of 4' (1.2m). 3" (76mm) high coamings are added to the fore and aft decks. The king and queen planks are Western Red Cedar with the decks mitered into the edges. Inwales are added to the cockpit sides to strengthen the topsides because frame #2 has been eliminated.
In this view, the foot of the mast under the foredeck, butted up against the forward bulkhead, is locked into the maststep at the forward edge of the floorboards.
The Mik Storer style holstered rudder is controlled by a shockcord (on the port side ending in a jam cleat) and on the starboard side by a control line running forward to the inwale.
At the bottom of the rudder holster there is a horizontal plate that is at waterline level. This plate matches in size the plate on the bottom of the rudder blade. These two plates increase the efficiency of the rudder, regardless of how deep the rudder blade is immersed.
|Bottom of the Rudder 'Holster'|
The plate on the bottom of the holster needs to be extended to the back of the rudder blade, but still open at the back so that the blade can pivot back if grounded.
Downwind sailing is powered by a 14 square foot (1.3 sq. m) sail hoisted on an 8' (2.4m) mast that is built in two 4' sections held together with a 1 & 3/4" ID (45mm) Carbon Fiber Oar Ferrule available from Duckworks. The two 4' sections and the sail can be rolled up and stored in the cockpit.
|Cartopper with Downwind Sail|
The sail is controlled by two sheets. The sheets run from the sail back to a dead eye, forward to a bollard and then to a jam cleat. The bollard idea came from Yrvind February 25, 2017 post.
To help control downwind tracking, a 2 & 3/4" (70mm) deep full length skeg is added. The idea for this came from Clint Chase's Drake (see construction photos).
|Full Length Skeg|
The 'tent' shelter is supported by the mast. The foot of the mast has a small 'lip' on the forward edge which hooks under the king plank on the forward edge of the mast slot. Headroom under the tent at the after end of the cockpit is 42" (1.1m).
|Mast as Shelter Support|
The forward coaming is slightly relieved by a 1/2" (13mm) to keep the mast from sliding side to side. Just forward of the coaming are two dead eyes to provide anchors for a tie down that holds the mast on the coaming. Note that the mast slot is closed by a plug, held in place by shock cord, while rowing (not shown here).
|Hold-down for the Mast Used as Tent Support|
|Tent Shelter in Place|
This view, looking aft, shows the bottom of the large waterproof access hatch in the bulkhead which provides not only flotation, but many cubic feet of storage space while cruising.
|Cockpit Looking Aft to the Bulkhead Access to Storage|
This oar cruiser really appeals to me: Compact, pretty, and ideal for weekend cruising in waters that jet skis and large cruisers can't reach.
Comments very welcome!