Here are some resources regarding the Olympic Adventure 47.  Most of this came from SailboatData.com, but I’ve gathered some from the files that came with the boat.  Hopefully this will help you out as the info seems to be pretty scarce on this boat!

Sailboat Data:

Hull Type:  Fin with rudder on skeg Rig Type:  Masthead Ketch
LOA:  47.00′ / 14.33m LWL:  43.33′ / 13.21m
Beam:  14.25′ / 4.34m Listed SA:  1057 ft2 / 98.2 m2
Draft (max.)  5.92′ / 1.80m Draft (min.)  
Displacement:  32000 lbs./ 14515 kgs. Ballast:  14000 lbs. / 6350 kgs.
Sail Area/Disp.1:  16.85 Bal./Disp.:  43.75% Disp./Len.:  175.60
Designer:  Ted Brewer
Builder:  Olympic Yachts S.A. (GRE)
Construction:  FG Bal. type:  
First Built:  1974 Last Built:   # Built:  
AUXILIARY POWER (orig. equip.)
Make:  Westerbeke Model:  4-230
Type:  Diesel HP:  70 HP
TANKS
Water:  400 gals. / 1514 ltrs. Fuel:  200 gals. / 757 ltrs.
RIG AND SAIL PARTICULARS  KEY
I(IG):  54.00′ / 16.46m J:  16.83′ / 5.13m
P:  47.75′ / 14.55m E:  17.66′ / 5.38m
PY:  31.75′ / 9.68m EY:  11.50′ / 3.51m
ISP:   SPL/TPS:  
SA(Fore.):  454.41 ft2 / 42.21 m2 SA(Main):  421.63 ft2 / 39.17 m2
Sail Area (100% fore+main triangles):   1,058.61 ft2 / 98.34 m2
Sail Area/Disp.2:  16.87 Est. Forestay Length.:  56.56′ / 17.24m
BUILDERS (past & present)
More about & boats built by:   Olympic Marine (GREECE)
DESIGNER
More about & boats designed by:   Edward S. Brewer

Engine / Transmission

Westerbeke 4-230, later knows as the W80, paired with a Paragon Power P23L transmission.

This engine is marinized from the British Leyland 1500 or 4-98.

Projects