CleanupBot II at 23:58, 13 August 2023

2023-08-13T23:58:03Z

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{{Short description|Indian military turboprop trainer}}
{{Use dmy dates|date=June 2022}}
{{Use Indian English|date=June 2022}}
{|{{Infobox aircraft begin
|name= HTT-40
|image= File:HAL HTT40 aeroIndia.jpg
|caption=
}}{{Infobox aircraft type
|type= [[Trainer (aircraft)|Basic training aircraft]]
|national origin= India
|manufacturer= [[Hindustan Aeronautics Limited]]
|designer = 
|design group = Aircraft Research and Design Centre<ref>{{cite news |last1=Thakur |first1=Aksheev |title=HAL’s HTT-40 gets airworthiness clearance certificate from CEMILAC |url=https://indianexpress.com/article/cities/bangalore/hals-htt-40-clearance-airworthiness-certificate-cemilac-7960888/ |access-date=20 October 2022 |publisher=The Indian Express |date=9 June 2022}}</ref>
|first flight= 31 May 2016<ref name="HTT-40’s first flight successful">{{cite news|title=HAL-built HTT-40’s first flight successful|url=http://www.oneindia.com/india/hal-built-htt-40-first-flight-successful-2114270.html|access-date=31 May 2016|publisher=One India|date=31 May 2022}}</ref> 
|introduced=
|retired=
|status= In production
|primary user= [[Indian Air Force]]
|more users= 
|produced= 
|number built= 2 prototypes
|developed from=
|variants with their own articles=
}}
|}

The '''HAL HTT-40''' (Hindustan Turbo Trainer-40) is an Indian [[Trainer (aircraft)|training aircraft]] designed and built by [[Hindustan Aeronautics Limited]] (HAL). It will replace the [[Indian Air Force]]'s retired [[HPT-32 Deepak]] as a basic trainer.<ref>{{Cite web|url=http://indiadefenceonline.com/1146/hal-offers-new-basic-trainer-to-air-force|archiveurl=https://web.archive.org/web/20101217003650/http://indiadefenceonline.com/1146/hal-offers-new-basic-trainer-to-air-force|url-status=dead|title=HAL Offers New Basic Trainer to Air Force|archivedate=December 17, 2022}}</ref><ref name="HALoutline">{{cite web|url = http://www.hal-india.com/futureproducts/products.asp|title = Hal htt-40|access-date = 8 May 2012|last = Hindustan Aeronautics Ltd|author-link = Hindustan Aeronautics Ltd|date = n.d.|archive-url = https://web.archive.org/web/20161222115526/http://www.hal-india.com/futureproducts/products.asp|archive-date = 22 December 2016|url-status = dead|df = dmy-all}}</ref>

==Design and development==
The HTT-40 is an all-metal, [[tandem]] seat aircraft powered by a {{convert|1100|hp|kW|0|abbr=on}} [[turboprop]] engine. In early 2012 the company forecast building 106 examples.<ref name="HALoutline" />

By the middle of 2012 the aircraft's future was in doubt as the Indian Air Force ordered 75 [[Pilatus PC-7]] Mk IIs to fill the role envisioned for the HTT-40. In September 2012 the Air Force indicated that it had formally rejected the HTT-40 for service based on its cost per aircraft being double that of the PC-7 Mk II, a proven aircraft, already in service worldwide. An MoD official noted, "We would be willing to pay higher rates to build indigenous capability in strategic defence equipment. But can HAL argue that the capability to build basic trainers is strategically vital[?]"<ref name="Shukla19Dec12">{{cite news|url = http://business-standard.com/india/news/mod-rejects-hals-proposal-to-build-basic-trainer/496078/|title = MoD rejects HAL's proposal to build basic trainer|access-date = 19 December 2012|last = Shukla|first = Ajai|date = 19 December 2012| work = [[Business Standard]]}}</ref><ref>{{cite web |url=http://millenniumpost.in/NewsContent.aspx?NID=4459 |title=Basic trainer for IAF | Millennium Post |publisher=Millenniumpost.in |date=2012-06-22 |access-date=2012-11-28 |archive-url=https://web.archive.org/web/20121104050658/http://millenniumpost.in/NewsContent.aspx?NID=4459 |archive-date=2012-11-04 |url-status=dead }}</ref><ref>{{cite web |author=SP's Special Correspondent |url=http://www.spsaviation.net/exclusive/?id=70&h=HAL-scouts-engine-for-HTT-40-basic-trainer |title=HAL scouts engine for HTT 40 basic trainer - SP's Aviation |publisher=Spsaviation.net |date=2012-06-18 |access-date=2012-11-28 |url-status=dead |archive-url=https://web.archive.org/web/20120626162750/http://www.spsaviation.net/exclusive/?id=70&h=HAL-scouts-engine-for-HTT-40-basic-trainer |archive-date=2012-06-26 }}</ref>

At that time HAL did not confirm the IAF announcement that it will not buy the HTT-40, nor did the company indicate whether the aircraft's development will be continued. A company spokesman said, "We treat all MOD issues/proposals as confidential...All our projects are conceived with national interest in mind though, at times, some of those take time to fructify".<ref name="Shukla19Dec12" />

Once the HTT-40 started flying, the Indian Air Force commander publicly stated that IAF will buy the HTT-40 in large numbers.<ref>{{Cite news|url=http://indianexpress.com/article/india/india-news-india/will-induct-indigenous-htt-40-planes-in-large-numbers-iaf-chief-3007990/|title=Will induct indigenous HTT 40 planes in large numbers: IAF chief|date=2016-09-01|work=The Indian Express|access-date=2018-01-09|language=en-US}}</ref>
[[File:IAF chief in HAL HTT-40 (2).jpg|thumb|right|A HAL HTT-40 in November 2019.]]

On 28 February 2015, it was reported that the Indian defense ministry had selected 68 HAL HTT-40 trainers and 38 [[Pilatus Aircraft|Pilatus]] trainers to replace its current trainer fleet, stating that this move was "commercially viable".<ref>{{cite web|url=http://indianexpress.com/article/india/india-others/parrikar-68-basic-trainer-aircraft-to-come-from-hal-38-from-pilatus/|title=Parrikar: 68 basic trainer aircraft to come from HAL, 38 from Pilatus|date=1 March 2015|work=The Indian Express|access-date=1 March 2022}}</ref>

On 21 June 2015, HAL chose the [[Honeywell]] [[Garrett TPE331]]-12B turboprop to power the trainer.<ref>{{Cite web |last=Pocock |first=Chris |last2=Mathews |first2=Neelam |date=19 June 2015 |title=HAL Chooses TPE331 for New Indian Basic Trainer |url=https://www.ainonline.com/aviation-news/defense/2015-06-19/hal-chooses-tpe331-new-indian-basic-trainer |access-date=2022-07-31 |website=Aviation International News |language=en}}</ref> The deal was signed on 27 July 2022, for 88 engines, kits, maintenance and support worth more than $100 million. Honeywell will work with HAL to extend support for exports.<ref>{{Cite web |last=Kumar |first=Chethan |date=27 July 2022 |title=HAL, Honeywell ink $100 million pack for HTT engine |url=https://timesofindia.indiatimes.com/india/hal-honeywell-ink-100-million-pack-for-htt-engine/articleshow/93163385.cms |access-date=2022-07-31 |website=The Times of India |language=en}}</ref>

HAL rolled out the first prototype on 2 February 2016<ref>{{cite web|url=http://www.newindianexpress.com/cities/bengaluru/Boost-to-Make-in-India-HAL-Rolls-out-HTT-40-Prototype/2016/02/02/article3257448.ece|title=Boost to Make in India: HAL Rolls-out HTT-40 Prototype|work=The New Indian Express|access-date=2 February 2022}}</ref> and it first flew on 31 May 2016.<ref name="HTT-40’s first flight successful"/>

The HTT-40 made its first public introduction flight on 17 June 2016, with Defence Minister [[Manohar Parrikar]] in attendance at the HAL airport in Bangalore.<ref>{{cite web|url=http://timesofindia.indiatimes.com/india/Indigenous-HTT-40-trainer-aircraft-makes-inaugural-flight/articleshow/52794848.cms|title=Indigenous HTT-40 trainer aircraft makes inaugural flight - Times of India|work=indiatimes.com|access-date=17 June 2022}}</ref> On 19 May 2017, the second prototype had its first flight.<ref>{{Cite web|url=https://timesofindia.indiatimes.com/city/bengaluru/htt-40-2nd-prototype-completes-maiden-flight/articleshow/58758866.cms|title=HTT-40 2nd prototype completes maiden flight | Bengaluru News - Times of India|website=The Times of India}}</ref>

In July 2019 it was anticipated that initial operational clearance would be reached by end of 2019 and that, after placement of an order, the first aircraft would be delivered to the IAF within a year.<ref>{{Cite web|url=https://economictimes.indiatimes.com/news/defence/no-need-to-import-trainer-aircraft-htt-40-to-be-ready-by-december-hal/articleshow/70423760.cms|title=No need to import trainer aircraft, HTT 40 to be ready by December: HAL|first=Manu|last=Pubby|date=July 29, 2019|via=The Economic Times}}</ref> In January 2020, HAL forecast that limited series production is to start in year 2020-21.<ref>{{Cite web|url=https://theprint.in/defence/hal-needs-new-orders-to-prevent-complete-halt-of-production-after-2021-22/348108/|title=HAL needs new orders to prevent complete halt of production after 2021-22|date=January 11, 2022}}</ref> On 11 August 2020, the Defence Acquisition Council approved procuring 106 HTT-40s for the Indian Air Force.<ref>{{Cite web|date=2020-08-11|title=IAF to get Made in India trainer aircraft from HAL; DAC approves proposals worth Rs 8722 crore|url=https://www.financialexpress.com/defence/iaf-to-get-made-in-india-trainer-aircrafts-from-hal-dac-approves-proposals-worth-rs-8722-crore/2052135/|access-date=2020-08-11|website=The Financial Express|language=en-US}}</ref> At [[Aero India]] 2021, HAL received request for proposal from the IAF for 70 HTT40s with an option for 38 more. Production will take place at the Bangalore and Nashik manufacturing plants.<ref>{{Cite web|last=Urs|first=Anil|date=4 February 2021|title=HAL hopes to fly high with CATS Warrior and RUAV drones |url=https://www.thehindubusinessline.com/news/hal-hopes-to-fly-high-with-cats-warrior-and-ruav-drones/article33752827.ece|url-status=live|access-date=2021-03-30|website=Business Line|language=en}}</ref>

By August 2021, the HTT-40 had completed its spin certification flight testing.<ref>{{Cite web|url=https://www.airrecognition.com/index.php/news/defense-aviation-news/2021/august/7509-india-htt-40-training-aircraft-ready-for-operational-clearance.html|title=India: HTT-40 training aircraft ready for operational clearance|website=www.airrecognition.com}}</ref> The platform received its provisional [[certificate of airworthiness]] from the [[Centre for Military Airworthiness and Certification]] (CEMILAC) on 6 June 2022.<ref>{{Cite web |last=Thapar |first=Vishal |date=7 June 2022 |title=Big Make In India Milestone, As HAL’s Basic Trainer Aircraft Gets Airworthiness Certification |url=http://businessworld.inhttps//www.businessworld.in/article/Big-Make-In-India-Milestone-As-HAL-s-Basic-Trainer-Aircraft-Gets-Airworthiness-Certification/07-06-2022-431674 |access-date=2022-10-20 |website=BW Businessworld |language=en}}</ref> At DefExpo 2022, IAF and HAL concluded ₹6,800 crore contract for 70 HTT-40. The remaining 36 will be procured after operationalization of HTT-40 fleet.<ref>{{Cite news |last=Peri |first=Dinakar |date=2022-10-20 |title=IAF-HAL conclude ₹6,800 crore contract for 70 HTT-40 trainer aircraft |language=en-IN |work=The Hindu |url=https://www.thehindu.com/news/national/iaf-hal-conclude-6800-crore-contract-for-70-htt-40-trainer-aircraft/article66037061.ece |access-date=2022-10-20 |issn=0971-751X}}</ref>



==Operators==
{{IND}}
* [[Indian Air Force]] — 70 on order. <ref>{{Cite web|title=Indian Air Force & HAL conclude contract for 70 HTT-40 indigenous trainer aircraft worth Rs 6,800 crore|url=http://pib.gov.in/Pressreleaseshare.aspx?PRID=1694844|access-date=2022-10-20|website=pib.gov.in|language=en}}</ref>

==Specifications (HTT-40)==
{{Aircraft specs
|ref=''Jane's All the World's Aircraft''<ref name="jawa-1617">{{cite book|editor1-last=Jackson|editor1-first=Paul|editor2-last=Peacock|editor2-first=Lindsay|editor3-last=Bushell|editor3-first=Susan|editor4-last=Willis|editor4-first=David|editor5-last=Winchester|editor5-first=Jim|title=IHS Jane's All the World's Aircraft: Development & Production|date=2016–2017|location=Couldson|isbn=978-0710631770|page=306|chapter=India}}</ref>
|prime units?=met

|genhide=

|crew=2
|capacity=
|length m=10.5
|length ft=34
|length in=5.5
|length note=
|span m=11
|span ft=36
|span in=1
|span note=
|height m=3.4
|height ft=11
|height in=1.75
|height note=
|wing area sqm=
|wing area sqft=
|wing area note=
|airfoil=
|empty weight kg=
|empty weight lb=
|empty weight note=
|gross weight kg=2800
|gross weight lb=
|gross weight note=
|max takeoff weight kg=
|max takeoff weight lb=
|max takeoff weight note=
|fuel capacity=450 kg
|more general=

|eng1 number=1
|eng1 name=[[Honeywell TPE331|Honeywell Garrett TPE331-12B]]
|eng1 type=turboprop
|eng1 kw=834
|eng1 shp=1100
|eng1 note=derated to 708 kW (950 shp)
|prop blade number=4
|prop name=
|prop dia m=
|prop dia ft=
|prop dia in=
|prop note=


|perfhide=

|max speed kmh=400
|max speed mph=249
|max speed kts=216
|max speed note=
|cruise speed kmh=
|cruise speed mph=
|cruise speed kts=
|cruise speed note=
|stall speed kmh=
|stall speed mph=
|stall speed kts=
|stall speed note=
|never exceed speed kmh=450
|never exceed speed mph=279
|never exceed speed kts=243
|never exceed speed note=
|range km=1000
|range miles=621
|range nmi=540
|range note=
|combat range km=
|combat range miles=
|combat range nmi=
|combat range note=
|ferry range km=
|ferry range miles=
|ferry range nmi=
|ferry range note=
|endurance=
|ceiling m=6000
|ceiling ft=19680
|ceiling note=
|g limits=+6/-3
|roll rate=
|glide ratio=
|climb rate ms=
|climb rate ftmin=
|climb rate note=
|time to altitude=
|lift to drag=
|wing loading kg/m2=
|wing loading lb/sqft=
|wing loading note=
|power/mass=
|thrust/weight=
|more performance=

|armament=*Can be armed with a gun, rockets and bombs<ref name="BS15Apr13">{{cite news|title=HAL's trainer pitted as Rs 4,500 cr cheaper than Swiss Pilatus trainer |first=Ajai |last=Shukla |url=http://www.business-standard.com/article/economy-policy/hal-s-trainer-pitted-as-rs-4-500-cr-cheaper-than-swiss-pilatus-trainer-113041500059_1.html|access-date=16 April 2013|newspaper=Business Standard|date=15 April 2022}}</ref><ref name=bm6f9f>{{cite news|title='Our trainer aircraft 40 times better than F-16s' |url=http://www.bangaloremirror.com/bangalore/others/Our-trainer-aircraft-40-times-better-than-F-16s/articleshow/21235150.cms?|access-date=9 February 2013|newspaper=Bangalore Mirror|date=6 February 2022}}</ref>
|guns=
|bombs=
|rockets=
|missiles=

|hardpoints=
|hardpoint capacity=
|hardpoint rockets=
|hardpoint missiles=
|hardpoint bombs=
|hardpoint other=
|other armament=
|avionics=
}}

{{aircontent

|see also=
|related=
|similar aircraft=
|lists=
}}

==See also==

{{aircontent|
|similar aircraft=
* [[Beechcraft T-6 Texan II]]
* [[Fuji T-7]]
* [[Pilatus PC-21]]
* [[PZL-130 Orlik]]
|lists=

|see also=
}}

==References==
{{Reflist}}

==External links==
{{Commons category-inline|HAL HTT-40}}

{{HAL aircraft}}

[[Category:HAL aircraft|HTT-40]]
[[Category:2010s Indian military trainer aircraft]]
[[Category:Single-engined tractor aircraft]]
[[Category:Single-engined turboprop aircraft]]
[[Category:Low-wing aircraft]]
[[Category:Aircraft first flown in 2016]]

HAL HTT-40 - Revision history

CleanupBot II at 23:58, 13 August 2023