Saturday, February 11, 2012

Design 1998 - Dida II

This particular boat was the prototype of the Alpa 12.7. This would the first of 9 production sailing yacht models designed by Sparkman & Stephens for Alpa Yachts of Cremona, Italy between 1969 and 1977. The boat was built of fiberglass and launched in 1969. She was built for a syndicate of owners primarily for racing.

The final production model would bear the name Alpa 42 and would be quite different from this flush deck boat but more about that in a future posting.

Here are the plans.

Principal Dimensions
LOA 41'-7"
LWL 30'-0"
Beam 11'-5"
Draft 6'-10"
Displacement 20,825 lbs
Ballast 9,300 lbs (outside) 500 lbs (inside)
Sail Area 788 sq ft

As a postscript here's Rod leaning on the freshly built boat at what I believe to be the Genoa Boat Show of 1969.


  1. What in the world is that foresail in the second picture of the boat, running downwind?

    It looks like nothing I've ever seen.

  2. Dear Blog Reader -
    That is a staysail spinnaker. There were actually 2 onboard: a smaller one made from 2.2oz cloth with a sail area of 166 sq ft and a large one made from 1.5oz cloth with a sail area of 345 sq ft. Both were set flying.

  3. I agree with Jack of all trades. NEVER seen a spinnaker stays'l. set like that, but it does look like a good way to set it, if you can get it to draw and stay full....

  4. The syndacate that commissioned this design to S&S office was promoted by Toni Pierobon who previously campagnied other S&S designed sailing boats always with the same name: Alnair.
    The partecipants were 12 of the most famous italian racing yachts owners of those years.
    The boats were all launched in the winter 1970/71 ready for the 1971 season.
    The photo with Rod was taken at 1970 genoa boat show.
    I personally owned one of them for 6 years, the one named Levantades III, the original owner was Beppe Diano, also well known to S&S for his previuos Levantades, both designed by S&S.
    Unfortunately the racing career of those boats was not so successfull, because of the delay between project and launching.
    Designed under RORC rules, they start racing when the new IOR rules were established.