R.511
The R.511 was a French air-to-air missile, developed by Matra, based on their work with the Matra M.04 (R.042) and R.05. The first version of the missile, the R.510, was infra-red guided, and while accurate had very limited operating parameters. The missile was superseded by the far more capable R.530 in French service, although continued to be used in training units until 1976. Description The R.510 was optically guided by a PbS infra-red photocell with a 20° field of view. Testing of the R.510 began at the CIEES missile range near Colomb-Béchar and Hammaguir, French Algeria, in October 1952, and a limited production run of 100 missiles was ordered. However the PbS seeker was insensitive and could only effectively track targets at night. The R.511 entered service in 1957, replacing the R.510. The R.511 used a Thompson-CSF semi-active radar homing head which was tuned to home on to reflections of the launch aircraft's radar; its antenna scanned conically 8° off the boresight of the missile at a rate of 225 revolutions per second. For longer range firing, guidance commands were transmitted directly to the missile via an antenna on the trailing edge of the missile's wing. Limitations of the launch