Editing Python (missile) (section)

==Other Python developments==
===Derby===
[[File:Derby missile.jpg|thumb|The ''Derby'' missile]]

Also known as the Alto, the Derby missile is a [[Beyond-visual-range missile|BVR]], medium-range (~{{cvt|50|km|mi}}) [[active radar homing]] missile. Though technically not part of the "Python" family, the missile is an enlarged version of the Python-4 with an active-radar seeker.<ref>{{cite web |url=http://www.israeli-weapons.com/weapons/missile_systems/air_missiles/derby/Derby.html |title=Derby Beyond Visual Range Air-to-Air Missile |archive-url=https://web.archive.org/web/20060718065607/http://www.israeli-weapons.com/weapons/missile_systems/air_missiles/derby/Derby.html |archive-date=2006-07-18 |website=www.Israeli-Weapons.com |url-status=dead}}</ref>

*Length: {{cvt|362|cm|in|abbr=on}}
*Span: {{cvt|64|cm|in|abbr=on}}
*Diameter: {{cvt|16|cm|in|abbr=on}}
*Weight: {{cvt|118|kg|lb|abbr=on}}
*Guidance: Active Radar
*Warhead: {{cvt|23|kg|lb|abbr=on}}
*Range: {{cvt|50|km|mi|abbr=on}}
*Speed: Mach 4

====I-Derby ER====
In June 2015, Rafael confirmed the existence of the I-Derby-ER, an extended range version of the Derby that increases range to {{convert|54|nmi|mi km|abbr=on}}, after a "Python 6" version based on an air-launched [[David's Sling|Stunner missile]] was abandoned.  To achieve greater range, a dual-pulse solid rocket motor is added, where the secondary pulse of energy as the missile nears the target extends flight time.  It also combines the seeker and fuse into an integrated sensor and fusing system to make room for the new motor.<ref>[https://www.flightglobal.com/news/articles/israel-long-range-fashion-catches-on-in-iaf-421153/ ISRAEL: Long-range fashion catches on in IAF] – Flightglobal.com, 25 January 2015</ref>

In May 2019, it was reported that India was planning to arm its [[Sukhoi Su-30MKI]] fighters with I-Derby ER missiles to replace its [[R-77]] missiles. Previously, in 2018, it had already been selected for the Indian Air Force's [[HAL Tejas]] fighter.<ref>{{Cite web |last1=Bedi |first1=Rahul |title=IAF plans to arm its Su-30MKI fleet with I-Derby ER BVRAAMs |url=https://www.janes.com/article/88867/iaf-plans-to-arm-its-su-30mki-fleet-with-i-derby-er-bvraams |work=Jane's Defence Weekly |language=en |date=29 May 2019 |archive-url=https://web.archive.org/web/20190529175655/https://www.janes.com/article/88867/iaf-plans-to-arm-its-su-30mki-fleet-with-i-derby-er-bvraams |archive-date=2019-05-29 |url-status=dead}}</ref>

===SPYDER===
{{Main|SPYDER}}
[[File:SPYDER.jpg|thumb|SPYDER—missile firing unit (MFU)]]

The SPYDER ('''S'''urface-to-air '''PY'''thon and '''DER'''by) is an advanced ground-based anti-aircraft missile system developed by Rafael that uses surface-to-air versions of the Python-5 and Derby missiles.