History
In 1962 India started work on the Thumba Equatorial Rocket Launching Station (TERLS).
The first sounding rocket launched here was a Nike-Apache rocket on 21 Nov 1963.
But work started to develop a pure indian sounding rocket. This was known as The Rohini Sounding Rocket (RSR) program. The single-stage Rohini (RH-75) rocket was a solid powered rocket. It was weighing 32 Kg with an additional 7 Kg payload.
RH stands for Rohini and 75 is simply the diameter
for the rocket tube in mm.
It was launched on November 20, 1967,
and reached an altitude of around 10 km. The rohoni RH-75 programme led to other and larger sounding rockets. But the experiences from working with solid rockets finally led to the development of real space launchers like Indias GSLV (Geo-Synchronous Launch Vehicle) and PSLV (Polar Satellite Launch Vehicle).
About the model
Thanks to Sathya Kumar, David Fitch and Eric Truax for ideas and facts about the rhonini models.
Eric Truax has made a mod-kit for this model, so it can be fitted with a mmx-rocket-engine:
How to make a flying Rohini model
Sources and further reading:
Rockets of the world by Peter Alway.
Drawing made
for me by Sathya Kumar.
Wikipedia.org
The Rohini RH-75 Indian Sounding Rocket by
Gordon Mandell, in Model Rocketry, August 1969 page 27-29.
Thehansindia.com - rh-75 | 
