11' Dinghy Night
Design Number 181
1979
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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.
![]() 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.
| Particulars: | Imperial | Metric | |
|---|---|---|---|
| Length overall | 11'-0" | 3.35 m | |
| Length datum waterline | 9'-6" | 2.90 m | |
| Beam | 4'-0" | 1.22 m | |
| Draft | 0'-6"/3'-0" | 0.15/0.91 m | |
| Freeboard: | Forward | 1'-9" | 0.53 m |
| Least | 1'-1" | 0.33 m | |
| Aft | 1'-5” | 0.43 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.
The calculated ratios of displacement-length and sail area-displacement will vary widely depending on the loading of the vessel.

