<Tr> <Th> No </Th> <Th> </Th> <Th> Name </Th> <Th> Took office </Th> <Th> Left office </Th> <Th> Time in office </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Elmhirst, Thomas Air Marshal Sir Thomas Elmhirst KBE, CB, AFC (1895--1982) </Td> <Td> 21 June 1948 </Td> <Td> 25 January 1950 </Td> <Td> 7002583000000000000 ♠ 1 year, 218 days </Td> </Tr> <Table> <Tr> <Th> No </Th> <Th> </Th> <Th> Name </Th> <Th> Took office </Th> <Th> Left office </Th> <Th> Time in office </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Elmhirst, Thomas Air Marshal Sir Thomas Elmhirst KBE, CB, AFC (1895--1982) </Td> <Td> 26 January 1950 </Td> <Td> 23 February 1950 </Td> <Td> 7001280000000000000 ♠ 28 days </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Ivelaw - Chapman, Ronald Air Chief Marshal Sir Ronald Ivelaw - Chapman KBE, GCB, CB, DFC, AFC (1899--1978) </Td> <Td> 23 February 1950 </Td> <Td> 9 December 1951 </Td> <Td> 7002654000000000000 ♠ 1 year, 289 days </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Gibbs, Gerald Air Marshal Gerald Gibbs CIE, CBE, MC & Two Bars (1896--1992) </Td> <Td> 10 December 1951 </Td> <Td> 31 March 1954 </Td> <Td> 7002842000000000000 ♠ 2 years, 111 days </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Mukerjee, Subroto Air Marshal Subroto Mukerjee OBE (1911--1960) </Td> <Td> 1 April 1954 </Td> <Td> 31 March 1955 </Td> <Td> 7002365000000000000 ♠ 1 year, 0 days </Td> </Tr> </Table> <Tr> <Th> No </Th> <Th> </Th> <Th> Name </Th> <Th> Took office </Th> <Th> Left office </Th> <Th> Time in office </Th> </Tr>

Who is the first air chief marshal of indian air force