I'm not sure what Heyerdahl did but this is what I found at www.greatdreams.com/thor.htm about the "Rah Expedition":
Thor Heyerdahl continued his research on ancienct navigation and turned his attention to the ancient reed-boats made of papyrus. These boats were deemed insufficient to cross the Atlantic as the reeds were believed to become water-logged after less than two weeks on open water. Heyerdahl believed that contemporary science underestimated the the ancient vessels and undertook to prove this by experiment. In 1969, he bought 12 tons of papyrus and worked with experts to construct an ancient-style vessel. The result was a 15 m boat which was launched at the old Phoenician port of Safi, Morocco. In the spirit of cooperation, Heyerdahl embarked under the UN flag with a crew of seven men from seven countries. The papyrus craft, Ra, sailed 5000 km (2700 nautical miles) in 56 days until storms and deficiencies in the construction caused the team to abandon their target only one week short of Barbados.It doesn't have much more in common with whatever the Polynesians might have done than be an ocean voyage in a small craft. Whatever Heyerdahl pretended, he knew what was out there and knew what sort of provisions were required. But at least on his first venture all he got was an A for effort. If he were really an ancient, he would have died.Ten months later, Heyerdahl tried the same voyage with the smaller (12 meter) Ra II. This vessel crossed the widest part of the Atlantic 6100 km (3270 nautical miles) in 57 days, from Safi to Barbados. Once again, this voyage showed that modern science under-estimated long-forgotten aboriginal technologies. The theory that Mediterranean vessels built prior to Columbus could not have crossed the Atlantic was thrown on its head.
In subsequent years, Heyerdahl continued on many other expeditions, including the Tigris river (1977) and the Maldives Islands (1982, 83 and 84). Now in his eighties, Heyerdahl remains an active participant in archaeological expeditions, as well as an international promoter of cooperation and understanding between peoples across the globe.
ML/NJ
It was the Kon-Tiki Expedition I was thinking of. From the same website you referenced:
http://www.greatdreams.com/thor.htm
RE: Polynesia: “Instead Heyerdahl became convinced that human settlers had come with the ocean currents from the west just as the flora and fauna had done. Abandoning his study of zoology, Heyerdahl began an intensive study of testing his theory on the origins of the Polynesian race and culture. He suggested that migration to Polynesia had followed the natural North Pacific conveyor, therefore turning his search for origins to the coasts of British Columbia and Peru. While working at the Museum of British Columbia, Heyerdahl first published his theory (International Science, New York, 1941) that Polynesia had been reached by two successive waves of immigrants. His theory suggested that the first wave had reached Polynesia via Peru and Easter Island on balsa rafts. Centuries later, a second ethnic group reached Hawaii in large double-canoes from British Columbia. The results of Heyerdahl's research were later published in his 800-page volume, American Indians in the Pacific (Stockholm, London, Chicago, 1952)….
Interupted by the outbreak of the Second World War, Heyerdahl returned to Norway to volunteer for the Free Norwegian Forces, eventually serving in a Nowegian parachute unit in Finnmark
. The Kon-Tiki Expedition (1947)
After the war, Heyerdahl continued his research, only to meet a wall of resistance to his theories amongst comtemporary scholars. To add weight to his arguments, Heyerdahl decided to build a replica of the aboriginal balsa raft (named the "Kon-Tiki") to test his theories. In 1947, Heyerdahl and five companions left Callio, Peru and crossed 8000 km (4300 miles) in 101 days to reach Polynesia (Raroia atoll, Tuamotu Archipelago). Despite skepticisim, the seaworthiness of the aboriginal raft was thus proven and showed that the ancient Peruvians could have reached Polynesia in this manner.
Heyerdahl was quite an adventurer.