Hello Ravi Kumar,
I can understand your confusion since all are good institutes for pursuing Aerospace Engineering.
Yes, IITK has an airstrip and a hangar equipped with 4/5 gliders. You can go in anytime and see those gliders. There is one whose skin has been ripped off so that you can see the structural arrangements of the glider. You get to have joy rides as well.
I cannot compare the research facilities of IITR ,IITR ,IIST and IITK ,since I don’t have complete information about IITM. Besides, it would be unjust to compare the research facilities since both institutions have focus on different areas of research.
I hope it helps you.