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{{Infobox space programme
| name = RLV Technology Demonstration Programme
| image = RLV-TD HEX01, TDV being hoisted.jpg
| caption = Technology Development Vehicle (TDV) for RLV Programme
| image_size = 300px
| country = [[India]]
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| duration = 2012–present<ref>{{cite web | url=https://spacenews.com/34979isro-to-begin-flights-of-reusable-launcher-test-bed/ | title=ISRO to Begin Flights of Reusable Launcher Test Bed }}</ref>
| firstflight = 01:30 UTC, 23 May 2016 <ref name='HEXlaunched'>{{cite news|title=India's First-Ever Indigenous Space Shuttle RLV-TD Launched Successfully|url=http://www.ndtv.com/india-news/india-all-set-to-launch-its-own-space-shuttle-today-1408943|access-date=2016-05-23|archive-date=2016-05-23|archive-url=https://web.archive.org/web/20160523081541/http://www.ndtv.com/india-news/india-all-set-to-launch-its-own-space-shuttle-today-1408943|url-status=live}}</ref>
| lastflight
| successes =
3 Landing flights
| launchsite = {{bullet list | [[Satish Dhawan Space Centre]] (HEX)| [[Chitradurga Aeronautical Test Range]] (
| launcher = Modified-[[Geosynchronous_Satellite_Launch_Vehicle#GSLV_Mark_II|GSLV Mark II]] L40 stage
| organisation = Indian Space Research Organisation
}}
'''Reusable Launch Vehicle–Technology Demonstration Programme''' is a series of [[technology demonstration]] missions that has been conceived by
For this purpose, a winged reusable launch vehicle technology demonstrator ('''RLV-TD''') has been configured. The RLV-TD acted as a flying test bed to evaluate various technologies like powered cruise flight, [[hypersonic flight]], and autonomous landing using air-breathing propulsion. Application of these technologies would bring down the launch cost by a factor of 10.<ref name="Presentation">{{cite web |url=http://www.livemint.com/Politics/T25O2kOeVcOL2vRfml0baK/Isros-small-steps-towards-developing-its-own-reusable-rocke.html |title=Tuesday, December 22, Isro's small steps towards developing its own reusable rocket [Reusable Launch Vehicle (RLV)] program |work=LIVE MINT, IN |date=2015 |access-date=2015-12-23 |archive-date=2016-05-26 |archive-url=https://web.archive.org/web/20160526125339/http://www.livemint.com/Politics/T25O2kOeVcOL2vRfml0baK/Isros-small-steps-towards-developing-its-own-reusable-rocke.html |url-status=live }}</ref> This project has no connection with the [[Avatar (spacecraft)|Avatar]] spaceplane concept by India's [[Defence Research and Development Organisation]].<ref name="Avatar is DRDO">{{cite web |url=http://dos.gov.in/sites/default/files/USQ251.pdf |title=Government of India Department of Space |date=March 14, 2012 |access-date=2016-04-27 |quote=Feasibility study of project "AVATAR)" has been done by a group of scientists in DRDO. ISRO has no connection with the project. |url-status=dead |archive-url=https://web.archive.org/web/20160805065726/http://dos.gov.in/sites/default/files/USQ251.pdf |archive-date=August 5, 2016 }}</ref>
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=== Hypersonic Flight Experiment ===
{{For|Japan's Hypersonic Flight Experiment|HYFLEX}}
The Reusable Launch Vehicle Hypersonic Flight Experiment or '''RLV HEX''' was the first test flight in the RLV Technology Demonstration Programme. HEX was successfully conducted on 23 May 2016.<ref name='HEXlaunched' /><ref>[https://www.isro.gov.in/update/23-may-2016/india%E2%80%99s-reusable-launch-vehicle-technology-demonstrator-rlv-td-successfully India’s Reusable Launch Vehicle-Technology Demonstrator (RLV-TD), Successfully Flight Tested] {{Webarchive|url=https://web.archive.org/web/20210209034327/https://www.isro.gov.in/update/23-may-2016/india%E2%80%99s-reusable-launch-vehicle-technology-demonstrator-rlv-td-successfully |date=2021-02-09 }}. 23 May 2016. ISRO.</ref><ref name=RLV-TD-1>[https://www.isro.gov.in/launcher/rlv-td RLV-TD] {{Webarchive|url=https://web.archive.org/web/20210417233754/https://www.isro.gov.in/launcher/rlv-td |date=2021-04-17 }}. ISRO. 23 May 2016. Includes diagrams.</ref> RLV-TD consists of a fuselage (body), a nose cap, double delta wings and twin vertical rudders. It has active control surfaces called Elevons and Rudders.<ref name="RLV-TD-1" /> Apart from the twin rudders it is similar in shape and operation to a small Space Shuttle Orbiter. TDV uses 600 or so heat resistant silica tiles and Flexible External Insulation, nose-cap is made out Carbon-Carbon composite with SiC coating. The leading edges of twin rudders are Inconel-718, wing leading edges of 15CDV6.<ref>{{cite web |last1=Kumar |first1=Kiran |title="Indigenous Development of Materials for Space Programme" |date=28 April 2016 |url=https://old.reddit.com/r/ISRO/comments/4grmoe/indigenous_development_of_materials_for_space/ |access-date=30 June 2020 |archive-date=30 June 2020 |archive-url=https://web.archive.org/web/20200630171158/https://old.reddit.com/r/ISRO/comments/4grmoe/indigenous_development_of_materials_for_space/ |url-status=live }}</ref><ref>{{cite web |title=SILICA TILES AS A THERMAL PROTECTION FOR RLV-TD |url=http://www.aerojournalindia.com/2017%20contents/Abstract%20of%20VSSC%20Special%20Issue_2017/Abstract%20of%20M_R_A_R_G_C_V_M_M_P_R.pdf |access-date=30 June 2020 |archive-date=30 June 2020 |archive-url=https://web.archive.org/web/20200630175238/http://www.aerojournalindia.com/2017%20contents/Abstract%20of%20VSSC%20Special%20Issue_2017/Abstract%20of%20M_R_A_R_G_C_V_M_M_P_R.pdf |url-status=usurped }}</ref><ref>{{cite web |title=Current Science Volume 114 - Issue 01 |url=http://www.currentscience.ac.in/php/toc.php?vol=114&issue=01 |access-date=30 June 2020 |archive-date=30 June 2020 |archive-url=https://web.archive.org/web/20200630233024/https://www.currentscience.ac.in/php/toc.php?vol=114&issue=01 |url-status=live }}</ref><ref>{{cite web |title=The technology behind India's Reusable Launch Vehicle |date=12 November 2018 |url=https://www.spacetechasia.com/technology-behind-indias-reusable-launch-vehicle/ |access-date=30 June 2020 |archive-date=30 June 2020 |archive-url=https://web.archive.org/web/20200630173633/https://www.spacetechasia.com/technology-behind-indias-reusable-launch-vehicle/ |url-status=live }}</ref><ref>{{cite web |title=A Deep Dive Into ISRO's Reusable Launch Vehicle Technology – Part I |url=http://delhidefencereview.com/2020/02/24/a-deep-dive-into-isros-reusable-launch-vehicle-technology-part-i/ |access-date=30 June 2020 |archive-date=28 June 2020 |archive-url=https://web.archive.org/web/20200628170038/http://delhidefencereview.com/2020/02/24/a-deep-dive-into-isros-reusable-launch-vehicle-technology-part-i/ |url-status=dead }}</ref><ref>{{cite web |title=A Deep Dive Into ISRO's Reusable Launch Vehicle Technology – Part II |url=http://delhidefencereview.com/2020/05/04/a-deep-dive-into-isros-reusable-launch-vehicle-technology-part-ii/ |access-date=30 June 2020 |archive-date=3 July 2020 |archive-url=https://web.archive.org/web/20200703121307/http://delhidefencereview.com/2020/05/04/a-deep-dive-into-isros-reusable-launch-vehicle-technology-part-ii/ |url-status=dead }}</ref>▼
[[File:RLV-TD HEX01 Logo.svg|thumb|RLV-HEX01 flight badge]]
▲The Reusable Launch Vehicle Hypersonic Flight Experiment or '''RLV HEX''' was the first test flight in the RLV Technology Demonstration Programme. HEX was successfully conducted on 23 May 2016.<ref name=
HEX was the first test flight of a reusable launch vehicle developed by India. The test flight objectives included:<ref name="hindu.com">{{Cite news |url=https://www.thehindu.com/todays-paper/tp-national/An-Indian-space-shuttle-takes-shape/article16607270.ece |title=''An Indian space shuttle takes shape'' 2009 |newspaper=The Hindu |date=31 March 2009 |access-date=2023-04-24 |archive-date=2023-04-04 |archive-url=https://web.archive.org/web/20230404081839/https://www.thehindu.com/todays-paper/tp-national/An-Indian-space-shuttle-takes-shape/article16607270.ece |url-status=live }}</ref>
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=== Future ===
Two more experiments are planned by ISRO: '''OREX''' (Orbital Return Flight Experiment) and '''SPEX''' (Scramjet Propulsion Experiment).<ref name="FinalTouches2015" /><ref>{{Cite web |url=http://www.bharat-rakshak.com/media/33219-5/IMG_0024.JPG |title=Poster on the RLV-TD |access-date=2009-07-30 |archive-date=2016-03-03 |archive-url=https://web.archive.org/web/20160303165739/http://www.bharat-rakshak.com/media/33219-5/IMG_0024.JPG |url-status=live }}</ref><ref>{{cite web| url=http://www.isro.gov.in/technology-development-programmes/reusable-launch-vehicle-technology-demonstration-program-rlv-td| title=Reusable Launch Vehicle - Technology Demonstration Program (RLV-TD) - ISRO| work=isro.gov.in| access-date=2015-06-08| archive-date=2016-05-23| archive-url=https://web.archive.org/web/20160523073038/http://www.isro.gov.in/technology-development-programmes/reusable-launch-vehicle-technology-demonstration-program-rlv-td| url-status=dead}}</ref> The OREX will launch on a [[Geosynchronous_Satellite_Launch_Vehicle|GSLV]] rocket with [[Polar Satellite Launch Vehicle#Fourth stage|PS-4]] stage instead of its [[Geosynchronous Satellite Launch Vehicle#Third stage|CUS]] [[upper stage]]s (due to decreased performance required for a suborbital flight unlike a regular GSLV launch) and [[RLV-TD|Orbital Re-entry vehicle]] (ORV) in place of its [[ogive]] [[payload fairing]] and re-enter the earth's atmosphere for a landing to demonstrate the viability of the project. The OREX vehicle will be 1.6 times larger than the Landing Experiment's Pushpak platform. It will have retractable landing gear and a thermal protection system for a safe re-entry into Earth's atmosphere.<ref name=":1" />
== Gallery ==
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