A trio of Thai Airtrainers.

The Royal Thai Air Force received 24 New Zealand Aerospace Industries Ltd (NZAI) CT-4A Airtrainer aircraft from 1974. 

These were followed by 6 CT-4B's in 1992.

And 16 CT-4E's were obtained in 1999 and 8 more in 2005.

A total of 54 aircraft.

All received New Zealand civil aircraft registrations for test flying at Hamilton and for ferrying to Thailand.

Below we have three Royal Thai Air Force CT-4As as photographed recently by Aaron Murphy in Bangkok.

I am not going to try and explain the Thai designation/serial number system- mainly because I cannot get my head around it - suffice to say that all the surviving CT-4B aircraft went to 604 Squadron around 2005 and were allocated an individual number within that Squadron.

In the photo below aircraft '01' was the first airframe for the Royal Thai Air Force which was officially handed over in a ceremony at Hamilton on 23-10-1973. 

This was initially ZK-DQT c/n CT-4A-003 and first flew on 13-10-1973.

The '60432' tells us it is with 604 Squadron and it is aircraft number 32.

Above is 604 Squadrons aircraft number 40. and airframe '17'.

This was originally ZK-DTW c/n 023.

604 Squadron aircraft number 42 and airframe number 20.

Making it originally ZK-DTT c/n 020.

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Plus the Royal Thai Police also received one NZAI T6/24 c/n B577 as '1909' ex ZK-DHH in 1972. And one CT-4 c/n CT/4-002 ex ZK-DIM as '2009' in late 1972.