Editing Diamant (section)

=== Diamant B ===
Diamant B was an improved version of the Diamant A with a more powerful first stage, being able to place a  190 kg payload at a 200 km orbit inclined at 5°, a 25 kg payload at a 1000 km orbit, or a 130 kg payload in low polar orbit.<ref name=":3">{{Cite web |title=Les lanceurs Diamant B et BP4 |url=http://www.capcomespace.net/dossiers/espace_europeen/espace_francais/diamant_B.htm |access-date=2024-09-23 |website=www.capcomespace.net}}</ref>

Five satellite launches were attempted between 1970 and 1973, of which the last two failed. All launches took place from [[Guiana Space Centre|Kourou]] in French Guiana.

Completely assembled, a Diamant B was 23.5 metres high and weighed 26.9 metric tons.<ref name=":0" />

Its ''Améthyste'' first stage was 14.2 meters long, had a diameter of 1.4 metres and weighed 20 metric tons. Its ''LRBA Valois'' N2O4/UDMH engine developed a thrust of 315&nbsp;kN for 116 seconds.<ref name=":3" /> 

The ''Topaze'' ''P-2.2'' second stage had one P4 solid propellant engine that developed a thrust of 150&nbsp;kN for a duration of 44 seconds.<ref name=":3" /> 

The ''P06'' third stage was 1.66 metres long and had a diameter of 80 centimetres. Its ''P0.68'' solid propellant engine developed a thrust of 50&nbsp;kN for 46 seconds.<ref name=":3" />