Editing Boeing AH-64 Apache (section)

===Overview===
{|class="wikitable floatright"
! Apache <br />version !! Engine version !! Engine power
|-
| AH-64A+/D<ref>US Army TM 1-1520-251-10 Operator's Manual for Helicopter, Attack, AH-64D Longbow Apache, dated 29 March 2002 pp. 2-31 to 2-36.</ref> || [[General Electric T700|General Electric T700-701]] || {{convert|1696|shp|abbr=on|lk=in}}<ref name="Bishop_p8-9"/>
|-
| AH-64A+/D || General Electric T700-701C || {{convert|1890|shp|abbr=on}}<ref>[http://www.geaviation.com/engines/military/t700/t700-701c.html "Model T700-701C"] {{webarchive |url=https://web.archive.org/web/20131217231053/http://www.geaviation.com/engines/military/t700/t700-701c.html |date=17 December 2013}}. GE Aviation</ref>
|-
| AH-64E || General Electric T700-701D || {{convert|1994|shp|abbr=on}}<ref>[http://www.geaviation.com/engines/military/t700/t700-701d.html "Model T700-701D"] {{webarchive |url=https://web.archive.org/web/20131217231213/http://www.geaviation.com/engines/military/t700/t700-701d.html |date=17 December 2013}}. GE Aviation</ref>
|-
| WAH-64D || [[Rolls-Royce Turbomeca RTM322]] ||{{convert|2100|shp|abbr=on}}<ref>[http://www.safran-helicopter-engines.com/helicopter-engines/over-2000-shp/rtm322 "RTM 322"]. Turbomeca</ref>
|}

The AH-64 Apache has a four-blade main rotor and a four-blade tail rotor.<ref name=dep_of_army>{{cite web |url=https://fas.org/man/dod-101/sys/ac/docs/1-112.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://fas.org/man/dod-101/sys/ac/docs/1-112.pdf |archive-date=2022-10-09 |url-status=live |title=Attack Helicopter Operations |first=Joel B. |last=Hudson |date=2 April 1997 |publisher=Department of the Army |page=166}}</ref> The crew sits in tandem, with the pilot sitting behind and above the co-pilot/gunner.<ref name=Donald_p110>Donald 2004, pp. 110–11.</ref> Both crew members are capable of flying the aircraft and performing methods of weapon engagements independently.<ref>{{cite web |title=How Apache Helicopters Work |date=2 April 2002 |url=http://science.howstuffworks.com/apache-helicopter4.htm |publisher=HowStuffWorks |access-date=10 October 2013}}</ref> The AH-64 is powered by two [[General Electric T700]] [[turboshaft]] engines with high-mounted exhausts on either side of the fuselage.<ref name="Donald_p111-2">Donald 2004, pp. 111–112.</ref><ref>{{cite news |url=http://www.accessmylibrary.com/article-1G1-9295562/ge-says-t700-operating.html |title=GE Says T700 Operating Well in Gulf |work=Defense Daily |date=20 December 1990 |archive-url=https://archive.today/20120719035126/http://www.accessmylibrary.com/article-1G1-9295562/ge-says-t700-operating.html |url-status=dead |archive-date=19 July 2012}}</ref> Various models of engines have been used on the Apache; those in British service use engines from [[Rolls-Royce plc|Rolls-Royce]]. In 2004, [[GE Aviation|General Electric Aviation]] began producing more powerful T700-GE-701D engines, rated at {{convert|2000|shp|kW|abbr=on}} for AH-64Ds.<ref>{{cite web |url=http://www.geae.com/aboutgeae/presscenter/military/military_20041104.html |title=T700-GE-701D Engine Awarded U.S. Army Qualification |publisher=GE Aviation |date=4 November 2004 |url-status=dead |archive-url=https://web.archive.org/web/20081121080711/http://www.geae.com/aboutgeae/presscenter/military/military_20041104.html |archive-date=21 November 2008}}</ref>

The crew compartment and rotor blades are designed to sustain a hit from [[23×152mm|{{convert|23|mm|in|abbr=on|2}}]] rounds. The airframe includes some {{convert|2500|lb|kg|abbr=on|sigfig=2}} of protection and has a [[Self-sealing fuel tank|self-sealing fuel system]] to protect against [[List of rifle cartridges|ballistic projectiles]].<ref>Richardson and Peacock 1992, pp. 16–17.</ref> The crew compartment also incorporates a transparent blast shield between the pilot and gunner seats so that at least one crew member can survive in the event of a direct hit, but the canopy and windows are otherwise unrated against ballistic threats.<ref>{{cite web |title=Boeing AH-64 Apache windshields, windows, canopy and blast barrier |url=https://www.ppgaerospace.com/getmedia/9a556385-c535-491c-bbce-e332a8ca63bf/boeing_apache_-AH64-12021Final.pdf?ext=.pdf |website=ppgaerospace.com |publisher=PPG Aerospace}}</ref>

The aircraft was designed to meet the [[crashworthiness]] requirements of MIL-STD-1290,<ref>{{Cite web |url=http://www.bellhelicopter.com/MungoBlobs/815/470/HelicopterSafetyHistory.pdf |archive-url=https://web.archive.org/web/20130418061005/http://www.bellhelicopter.com/MungoBlobs/815/470/HelicopterSafetyHistory.pdf |url-status=dead |title=The History of Helicopter Safety |archive-date=18 April 2013}}</ref> which specifies minimum requirement for crash impact energy attenuation to minimize crew injuries and fatalities. This was achieved through incorporation of increased structural strength, crashworthy landing gear, seats and fuel system.

On a standard day, when temperatures are 59&nbsp;°F (15&nbsp;°C), the AH-64 has a vertical rate of climb of 1,775 feet per minute (541 m/min), and a service ceiling of 21,000 feet (6,400 m).<ref>{{cite web |url=https://fas.org/man/dod-101/sys/ac/ah-64.htm |title=AH-64 Apache – Military Aircraft |website=fas.org |access-date=22 June 2016}}</ref> However, on a hot day, when temperatures are 70&nbsp;°F (21&nbsp;°C), its vertical rate of climb is reduced to 1,595 fpm (486 m/min), and service ceiling is reduced to 19,400 feet (5,900 m) due to less dense air.<ref>{{cite web |url=http://www.military-today.com/helicopters/boeing_ah64d_longbow.htm |title=Boeing AH-64D Longbow Apache Attack Helicopter |website=military-today.com |access-date=22 June 2016 |archive-date=9 June 2016 |archive-url=https://web.archive.org/web/20160609093342/http://www.military-today.com/helicopters/boeing_ah64d_longbow.htm |url-status=usurped }}</ref>