The Kon-Tiki expedition was a 1947 journey by raft across the Pacific Ocean from South America to the Polynesian islands, led by Norwegian explorer and ethnographer Thor Heyerdahl. The raft was named Kon-Tiki after the Inca god Viracocha, for whom "Kon-Tiki" was said to be an old name. Heyerdahl's book on the expedition was entitled The Kon-Tiki Expedition: By Raft Across the South Seas. A 1950 documentary film won the Academy Award for Best Documentary Feature. A 2012 dramatized feature film was nominated for the Academy Award for Best Foreign Language Film.
Overview
The Kon-Tiki expedition was funded by private loans, along with donations of equipment from the United States Army. Heyerdahl and a small team went to Peru, where, with the help of dockyard facilities provided by the Peruvian authorities, they constructed the raft out of balsa logs and other native materials in an indigenous style as recorded in illustrations by Spanish conquistadores. The trip began on April 28, 1947. Heyerdahl and five companions sailed the raft for 101 days over 6,900 km (4,300 miles) across the Pacific Ocean before smashing into a reef at Raroia in the Tuamotus on August 7, 1947. The crew made successful landfall and all returned safely.
Heyerdahl believed that a sun-worshiping blond/red-haired and blue-eyed Caucasian people (whom he called the "Tiki people") from South America could have reached Polynesia during pre-Columbian times by drifting with the wind directions. His aim in mounting the Kon-Tiki expedition was to show, by using only the materials and technologies available to those people at the time, that there were no technical reasons to prevent them from having done so. Although the expedition carried some modern equipment, such as a radio, watches, charts, sextant, and metal knives, Heyerdahl argued they were incidental to the purpose of proving that the raft itself could make the journey.
Heyerdahl's full hypothesis that a white race reached Polynesia before the Polynesian people has been overwhelmingly rejected by research, even before the expedition. Heyerdahl also did not believe in the western origins of Polynesians, who he believed were too primitive to sail against the wind and currents. Archaeological, linguistic, cultural, and genetic evidence supports a western origin for Polynesians, from Island Southeast Asia, using sophisticated multihull sailing technologies and navigation techniques during the Austronesian expansion. Although there is putative evidence of Polynesian contact with South America, it is more likely for Polynesians (who were already long-distance voyagers) to have been the ones to reach South America than the other way around.
Thor Heyerdahl's book about his experience became a bestseller. It was published in Norwegian in 1948 as The Kon-Tiki Expedition: By Raft Across the South Seas, later reprinted as Kon-Tiki: Across the Pacific in a Raft. It appeared with great success in English in 1950, also in many other languages. A documentary motion picture about the expedition, also called Kon-Tiki, was produced from a write-up and expansion of the crew's filmstrip notes and won an Academy Award in 1951. It was directed by Heyerdahl and edited by Olle Nordemar. The voyage was also chronicled in the documentary TV-series The Kon-Tiki Man: The Life and Adventures of Thor Heyerdahl, directed by Bengt Jonson.
The original Kon-Tiki raft is now on display in the Kon-Tiki Museum at Bygdøy in Oslo.
Crew
Kon-Tiki had a six-man crew, five of whom were Norwegian; Bengt Danielsson was Swedish. A seventh member of the team handled administration from land but did not travel on the raft.
- Thor Heyerdahl (1914–2002) was the expedition leader. He was also the author of the book of the expedition and the narrator of the story. Heyerdahl had studied the ancient people of South America and Polynesia and believed that there was a link between the two.
- Erik Hesselberg (1914–1972) was the navigator and artist. He painted the large Kon-Tiki figure on the raft's sail. His children's book Kon-Tiki and I appeared in Norwegian in 1949 and has since been published in more than 15 languages.
- Bengt Danielsson (1921–1997) took on the role of steward, in charge of supplies and daily rations. Danielsson was a Swedish sociologist interested in human migration. He served as translator, as he was the only member of the crew who spoke Spanish. He was a voracious reader; his box aboard the raft contained many books.
- Knut Haugland (1917–2009) was a radio expert, decorated by the British in World War II for actions in the Norwegian heavy water sabotage that stalled what were believed to be Germany's plans to develop an atomic bomb. Haugland was the last surviving crew member; he died on Christmas Day, 2009 at the age of 92.
- Torstein Raaby (1918–1964) was also in charge of radio transmissions. He gained radio experience while hiding behind German lines during WWII, spying on the German battleship Tirpitz. His secret radio transmissions eventually helped guide in Allied bombers to sink the ship.
- Herman Watzinger (1910–1986) was an engineer whose area of expertise was in technical measurements. He was the first to join Heyerdahl for the trip. He collected and recorded data (such as weather data) on the voyage.
- Gerd Vold Hurum was the project manager who helped Thor Heyerdahl to organize the Kon-Tiki Expedition.
The expedition also carried a parrot named Lorita who drowned in the middle of the expedition.
Construction
The main body of the float was composed of nine balsa tree trunks up to 14 m (45 ft) long, 60 cm (2 ft) in diameter, lashed together with 30 mm (1+1⁄4 in) hemp ropes. Cross-pieces of balsa logs 5.5 m (18 ft) long and 30 cm (1 ft) in diameter were lashed across the logs at 91 cm (3 ft) intervals to give lateral support. Pine splashboards clad the bow, and lengths of pine 25 mm (1 in) thick and 60 cm (2 ft) wide were wedged between the balsa logs and used as centreboards.
The mainmast was made of lengths of mangrove wood lashed together to form an A-frame 8.8 m (29 ft) high. Behind the mainmast was a cabin of plaited bamboo 4.3 m (14 ft) long and 2.4 m (8 ft) wide, about 1.2–1.5 m (4–5 ft) high and roofed with banana leaf thatch. At the stern was a 5.8 m (19 ft) long steering oar of mangrove wood, with a blade of fir. The mainsail was 4.6 by 5.5 m (15 by 18 ft) on a yard of bamboo stems lashed together. Photographs also show a topsail above the mainsail, and also a mizzen sail, mounted at the stern.
The raft was partially decked in split bamboo. The main spars were a laminate of wood and reeds and Heyerdahl tested more than twenty different composites before settling on one that proved an effective compromise between bulk and torsional rigidity. No metal was used in the construction.
Supplies
Kon-Tiki carried 1,040 litres (275 US gal) of drinking water in 56 water cans, as well as a number of sealed bamboo rods. The purpose stated by Heyerdahl for carrying modern and ancient containers was to test the effectiveness of ancient water storage. For food Kon-Tiki carried 200 coconuts, sweet potatoes, bottle gourds and other assorted fruit and roots. The U.S. Army Quartermaster Corps provided field rations, tinned food and survival equipment. In return, the Kon-Tiki explorers reported on the quality and utility of the provisions. They also caught plentiful numbers of fish, particularly flying fish, "dolphin fish", yellowfin tuna, bonito and shark.
Heyerdahl and crew were equipped with water-tight sports wristwatches manufactured by Swiss watchmaking firm Eterna. After the journey, Eterna decided to brand their sports watches as "Kon-Tiki".
Communications
The expedition carried an amateur radio station with the call sign of LI2B operated by former World War II Norwegian resistance radio operators Knut Haugland and Torstein Raaby. Haugland and Raaby maintained regular communication with a number of American, Canadian, and South American stations that relayed Kon Tiki's status to the Norwegian Embassy in Washington, D.C. On August 5, Haugland made contact with a station in Oslo, Norway, 16,000 kilometres (10,000 mi) away.
Kon Tiki's transmitters were powered by batteries and a hand-cranked generator and operated on the 40, 20, 10, and 6-meter bands. Each unit was water resistant, used 2E30 vacuum tubes, and provided approximately 6 watts of RF output; the equivalent of a small flashlight. Two British 3-16 MHz Mark II transmitters were also carried on board, as was a VHF transmitter for communicating with aircraft and a hand-cranked survival radio of the Gibson Girl type for 500 and 8280 kHz.
The radio receiver used throughout the voyage, a National Radio Company NC-173, once required a thorough drying out after being soaked when landing in Rarotonga. The crew once used a hand-cranked emergency transmitter to send out an "all well, all well" message "just in time to head off a massive rescue attempt".
The call sign LI2B was used by Heyerdahl again in 1969–70, when he built a papyrus reed raft and sailed from Morocco to Barbados in an attempt to show a possible link between the civilization of ancient Egypt and the New World.
The Voyage
Kon-Tiki left Callao, Peru, on the afternoon of April 28, 1947. To avoid coastal traffic it was initially towed 80 km (50 mi) out by the Peruvian Navy fleet tug Guardian Rios, then sailed roughly west carried along on the Humboldt Current.
On July 2, Heyerdahl writes about an encounter with a rogue wave; in his book he describes a "Three Sister" phenomenon: "During a night-shift with quiet seas appears an 'abnormal huge wave' followed by two more waves. The raft is being swept up and down and is covered in water." After the three waves he describes the sea as quiet as before.
The crew's first sight of land was the atoll of Puka-Puka on July 30. On August 4, the 97th day after departure, Kon-Tiki reached the Angatau atoll. The crew made brief contact with the inhabitants of Angatau Island, but were unable to land safely. Calculations made by Heyerdahl before the trip had indicated that 97 days was the minimum amount of time required to reach the Tuamotus, so the encounter with Angatau showed that they had made good time.
On August 7, the voyage ended when the raft struck a reef and was then beached on an uninhabited islet off Raroia atoll in the Tuamotus. The team had travelled a distance of around 6,980 km (4,340 mi; 3,770 nmi) in 101 days, at an average speed of 1.5 knots (2.8 km/h; 1.7 mph).
After spending a number of days alone on the islet, the crew were greeted by men from a village on a nearby island who arrived in canoes, having seen washed-up flotsam from the raft. The crew were taken back to the native village, where they were feted with traditional dances and other festivities. Finally the crew were taken off Raroia to Tahiti by the French schooner Tamara, with the salvaged Kon-Tiki in tow.
Anthropology
The basis of the Kon-Tiki expedition was pseudoscientific, racially controversial, and has not gained acceptance among scientists (even prior to the voyage). Heyerdahl believed that the original inhabitants of Easter Island (and the rest of Polynesia) were the "Tiki people", a race of "white bearded men" who supposedly originally sailed from Peru. He described these "Tiki people" as being a sun-worshipping fair-skinned people with blue eyes, fair or red hair, tall statures, and beards. He further said that these people were originally from the Middle East, and had crossed the Atlantic earlier to found the great Mesoamerican civilizations. By 500 CE, a branch of these people were supposedly forced out into Tiahuanaco where they became the ruling class of the Inca Empire and set out to voyage into the Pacific Ocean under the leadership of "Con Ticci Viracocha".