Sikorsky–Boeing SB-1 Defiant Referensi
↑ "Defiant's first flight falls behind" . Flightglobal. 21 April 2017. Diakses tanggal 20 April 2017 .
↑ Boeing and Sikorsky team up on US Army’s JMR – Flightglobal.com, 18 January 2013
↑ "Sikorsky, Boeing Partner for Joint Multi-Role Future Vertical Lift Requirements" . PR Newswire. 18 January 2013. Diarsipkan dari asli tanggal 9 February 2013. Diakses tanggal 28 January 2013 .
↑ Sikorsky and Boeing to pitch ‘X-2’-based design for US Army JMR TD effort – Flightglobal.com, 28 February 2013
↑ "Boeing-Sikorsky Team Emerges as Frontrunner After EADS Quits Army Helo Competition" (archived copy) – Nationaldefensemagazine.org, 14 June 2013.
↑ "Sikorsky Moves X2 Technology Up A Size For JMR " Aviation Week & Space Technology , 4 November 2013. Accessed: 22 June 2014. Archived on 22 June 2014.
↑ Boeing and Sikorsky Name New Rotorcraft Diarsipkan 2013-10-22 di Wayback Machine . – Aviationweek.com, 21 October 2013
↑ Drwiega, Andrew. "Sikorsky-Boeing Announces JMR Defiant Team " MilTechMag , 9 April 2015.
↑ "Salinan arsip" . Diarsipkan dari asli tanggal 2020-09-28. Diakses tanggal 2022-02-06 .
↑ Garrett Reim (9 Oct 2018). "Despite delays, SB-1 Defiant on track for 2018 first flight" . Flightglobal .
↑ Mark Huber August 9, 2018. "Sikorsky Defiant Moves Closer To First Flight" . AIN online . Pemeliharaan CS1: Nama numerik: authors list (link )
↑ Greg Waldron (27 Dec 2018). "SB-1 Defiant breaks cover" . Flightglobal .
↑ Garrett Reim (31 Jan 2019). "SB-1 Defiant starts ground run tests ahead of first flight" . Flightglobal .
↑ "Sikorsky-Boeing SB>1 DEFIANT™ Helicopter Achieves First Flight" (Press release). Boeing. 21 March 2019.
↑ "Defiant back in the air after 'bearing creep' issue found on test bed" . Vertical Magazine . Diakses tanggal 2019-11-26 .
↑ Judson, Jen (14 October 2020). "Watch the SB-1 Defiant coaxial demonstrator aircraft hit 230 knots" . Defense News .
↑ "Defiant roars through flight test milestones in 2020" . Vertical Magazine . 30 December 2020.