The test facility ‘S1’ nicknamed ‘Vaigai’ is the first in the series of Shock tunnel test facilities at Hypersonic Experimental Aerodynamics Laboratory, IITK. The facility is multifaced; can be operated as shock tube/ Ludwieg tube/ shock tunnel, both in reflected as well as straight through mode and Expansion Tunnel. The test facility is 14 m long with 2m Driver, 10m Driven (for shock tunnel mode)  and 2m long dump tank assembly with test section. The facility generates Mach 4 and Mach 6 flow based on the nozzle throat insert for shock tunnel. It operates in the enthalpy range 0.3 – 5 MJ/kg depending on mode of operation.

The test facility ‘S2’ nicknamed ‘Jigarthanda’ is second in the series of Shock tunnel test facilities at Hypersonic Experimental Aerodynamics Laboratory, IITK. The facility is a Free Piston driven type; can be operated as reflected shock tunnel or expansion tunnel. The facility consists of 6.5 m long and 225 mm compression tube, 65mm dia and 4.5 m shock tube and 8 m long acceleration tube opening into a diverging nozzle with exit dia of 200 mm. The free piston weighing 15kg is launched from a piston launcher supplied with required pressure from a reservoir. The test facility is designed to generate flow enthalpies ranging from 3 to 40 MJ/kg, simulating flight velocities ranging from 2.5 to 12 km/s depending on fill conditions.

The facility ‘S3’ nicknamed ‘Honeybee’ is the third in the series of the facilities established at HEAL for Hypersonic Aerothermodynamics research. It’s a 15kW plasma torch facility capable of generating Argon, N2 and Air plasma with temperature ranging from 4000 – 6000 K.