| Purachatra Jayakara | |
| Prince of Kamphaengphet | |
| Spouse: | Princess Prabhavasit Narumon of Siam Princess Ladakham of Chiang Mai and 5 other junior consorts |
| Issue: | see below |
| Full Name: | Purachatra Jayakara |
| Succession: | Commander of the Royal Siamese Railway |
| Reign: | 5 June 1917 –8 September 1928 |
| Reign-Type: | In office |
| Predecessor: | Henry Gittins |
| Successor: | Sansoen Duriyang |
| Succession1: | Minister of Commerce and Transport |
| Reign1: | 15 May 1926 –29 June 1932 |
| Reign-Type1: | In office |
| Predecessor1: | Prince of Chanthaburi Wongsanupraband |
| Successor1: | Wongsanupraband |
| Succession2: | Minister of Commerce |
| Reign2: | 29 June –10 December 1932 |
| Reign-Type2: | In office |
| Successor2: | Wongsanupraband |
| Mother: | Wat |
| Birth Date: | 1881 1, df=y |
| Birth Place: | Grand Palace, Bangkok, Siam |
| Death Place: | Singapore, Straits Settlements |
| Signature: | Burachat signature.svg |
Purachatra Jayakara, Prince of Kamphaengphet (th|บุรฉัตรไชยากร; ; 23 January 1881 – 14 September 1936) was a Prince of Siam and a member of the Siamese Royal Family (later Thailand). He founded the House of Chatrajaya (Thai: ราชสกุลฉัตรไชย), his descendants still use this royal surname. He was a son of King Chulalongkorn (Rama V the Great) of Siam. He was often called the Father of the Thai radio and the Father of the Thai railways, due to his contributions in both fields.
Prince Purachatra Jayakara was born on 23 January 1881,[1] in the compound of the Grand Palace. He was the 35th son of Chulalongkorn and Consort Wad. He began his education at Suankularb Wittayalai School, followed by attendance at Harrow School in 1894. The prince then attended the School of Engineering at Trinity College, Cambridge, and engineering at Chatham. He also studied in France and Netherlands in the School of engineering of digging dam-canals. After graduating, he went back to work in England. He became an officer of the Institution of Civil Engineers.
He returned to Thailand in 1904, working as a military engineer and officer of the Siamese Royal Army. He developed the Siamese Department of Engineering militaries using knowledge gained from his Western education. In 1933, he retired to Singapore with his family, residing there until his death on 14 September 1936, at the age of 55.
In the reign of King Chulalongkorn. He gave the Siamese railway offices in control of the foreigners, for administration in the railways system around Thailand. Until his death in 1910, starting the new reign of King Vajiravudh (Rama VI), he requested his stepbrother, Prince Purachatra Jayakara to be the Head of the Northern railway department. Later in 1917, King Vajiravudh merged the railways of the Northern line and the Southern line into the Royal Railway department and had Prince Purachatra Jayakara as the first commander.[2] He developed and well-administrated the railway system. He expanded the rail lines around the northern and southern territory. Moreover, he created Northeastern Line, started from Nakhon Ratchasima Province to Ubon Ratchathani Province. And Eastern Line, started from Chachoengsao Province to Sa Kaeo Province which ended at Aranyaprathet District. He purchased 2 180 horsepower diesel locomotives from Swiss Locomotive and Machine Works to use for local train around Bangkok in 1928, as the first country in Asia to do so.[3]
Later, King Vajiravudh dissolved the road department and included into the Royal Railway Department. Prince Purachatra Jayakara was responsibility for creating all the roads and bridges around the country, such as the Kasatsuk Bridge, Ratchadaphisek Bridge in Lampang Province, Phra Buddha Yodfa Bridge and Rama VI Bridge, the first bridge to cross Chao Phraya River.[4]
In 1921, he served as the commander of the railway department. He brought the engine of searching crude oil, firstly in Fang District, Chiang Mai Province where the people there found many amounts of crude oil. He hired the American Geologist to work as surveying in geological system, for finding crude oil and coal around Thailand.
He was the first to bring the communication system into the country. He set up a small radio for trial broadcasting and first broadcast in 1930.[5] He established the first radio broadcasting station called Phayathai radio station. He was the first person of Siam to establishing the communication broadcasting system in the country. Then he became the Ministry of Commerce and Transport. He considered about establishing the television broadcasting transmission, which would have made Siam the first country in Asia to experiment with television, and had contacted an American company to provide and install equipment; however, because of the Siamese Revolution of 1932, the project was cancelled. Furthermore, he created the telegraph offices around the country, for mailing services, parcel, and postal services. He created the communication services from Thailand to many foreign countries.
In the transportation systems, he interested about the flight operation systems. He demonstrated flying, later acknowledged as the first Thai people embarking. He then established the flight operation systems business aviation, including the international aviation, for commercial aviation international services.
On 1 April 1926, he became the Minister of Commerce and Transport, which were both included into the one ministry. After the Siamese Revolution, he usually did the royal duties and royal ceremonies represented his half-brother, King Prajadhipok (Rama VII), before his abdication.
Prince Purachatra Jayakara, the Prince of Kamphaengphet had 7 consorts, and 12 children; 4 sons and 8 daughters.
He firstly married on 16 November 1904 with his cousin, Princess Prabhavasit Narumon, daughter of the Chaturonrasmi, the Prince Chakrabadibongse, King Chulalongkorn's younger brother. The couple had 4 children; 1 son and 3 daughters;
He secondly married with a Chiang Mai's princess, Chao Ladakham, had 2 daughters;
Mom Pian Chatrajaya na Ayudhya (née Surakup; 1 September 1899 – 14 July 1938), had 1 daughter;
Mom Pued Chatrajaya na Ayudhaya (née Pheungrakwong; 12 June 1906 – 5 March 1984), had 1 son;
Mom Buaphud Chatrajaya na Ayudhya (née Intrasut; born 5 April 1911), had 1 son and 1 daughter;
Mom Chamlong Chatrajaya na Ayudhya (née Chalanukroh; 8 September 1913 – 4 November 1968), had 1 daughter;
Mom Euam Chatrajaya na Ayudhya (née Aruntat; 14 October 1910 – 16 February 1948), had 1 son;
| Prince Purachatra Jayakara, the Prince of Kamphaengphet | Father: Chulalongkorn, King Rama V of Siam | Paternal Grandfather: Mongkut, King Rama IV of Siam | Paternal Great-grandfather: Buddha Loetla Nabhalai, King Rama II of Siam |
| Paternal Great-grandmother: Queen Sri Suriyendra | |||
| Paternal Grandmother: Queen Debsirindra | Paternal Great-grandfather: Prince Sirivongse, the Prince Matayabidaksa | ||
| Paternal Great-grandmother: Mom Noi Sirivongs na Ayudhya | |||
| Mother: Wat | Maternal Grandfather: Lord Sathiarnraksa | Maternal Great-grandfather: unknown | |
| Maternal Great-grandmother: unknown | |||
| Maternal Grandmother: Prik | Maternal Great-grandfather: Phraya Isranubhab | ||
| Maternal Great-grandmother: Kham Kalyanamitra |