This picture was removed a day after HAL unveiled a scale model of the Hindustan Lead in Fighter trainer (HLFT-42).
In Hindi, Marut is one of the several names of Wind or ‘Pawan’.
In Hindu mythology, Lord Hanuman is the son of Pawan, which is why a picture of the lord was displayed on the model aircraft.
The HLFT-42 is a next-generation, supersonic trainer that has been developed for a critical role in modern combat aircraft training, designed to bridge the gap between the Hawk-132 Subsonic trainer and Mig-21, which are used to train pilots in supersonic technology.