11' Dinghy Night
This dinghy was designed for a friend of ours, to serve as tender to his 33' schooner. He's a well-known marine
writer with a fondness for bad puns. He wanted to write an article about building the boat, which he would entitle
"Night is the Tender"....
|Design Number 181|
The design concept was for a simply built marine plywood dinghy that had a traditional appearance and spritsail
rig. We looked at the possibility of making the bow section removable, using the stern as a pram, and letting
the two parts nest and stow in a smaller space on deck. This is certainly possible to do. However it is not
shown on the drawings since we never pursued detailing it for our client.
Her hull form is slender enough to be easily rowed, so she'll be a good pulling boat. This slenderness also means
she's easily driven under sail, and the rig should be of generous size for her.
Fred Brunhouse's nice
cold-molded 11' dinghy
ready to go sailing.
The daggerboard slot is off center, to allow for the large combination box and seat on centerline. The box is to
function as storage for the outboard engine and the miscellaneous collection of things that you'd want to carry along.
On a passage, it might have the lifeboat stores and equipment in it. Fitted with a hasp and lock, it can be a secure
storage space when going ashore.
|Length overall||11'-0"||3.35 m|
|Length datum waterline||9'-6"||2.90 m|
|Estimated structural weight||120 lbs.||55 kg.|
|Displacement, to DWL||365 lbs.||166 kg.|
|Displacement-length ratio||190|| |
|Sail area||67 sq. ft.||6.22 m2|
|Sail area-displacement ratio||21.0|| |
|Prismatic coefficient||.62|| |
|Pounds per inch immersion||125|| |
|Entrance half-angle||25°|| |
Note: The displacement numbers are calculated to the arbitrarily chosen DWL.
The calculated ratios of displacement-length and sail area-displacement will vary widely
depending on the loading of the vessel.