INTA-255
The INTA-255 was a Spanish sounding rocket. The INTA-255 was launched with 4 Chick rockets, which start with 0.2 seconds long burned. The apogee of INTA-255 amounted to 150 km, the takeoff thrust 42.00 kN, the gross mass 340 kg, the diameter 0.26 m and the length to 6,03 m.

Launches 
The INTA-255 was launched by INTA three times from El Arenosillo, between 1969 and 1970. See also 
INTA-300

References

Sounding rockets of Spain
Space launch vehicles of Spain
Spaceflight
Instituto Nacional de Técnica Aeroespacial