VTOL (English Wikipedia)

"Grasshopper flies to its highest height to date". Social media information release. SpaceX. 12 October 2013. Retrieved 14 October 2013. WATCH: Grasshopper flies to its highest height to date – 744 m (2441 ft) into the Texas sky.

flightglobal.com (Global: 223^rd place; English: 162^nd place)

"As McDonnell Douglas revises JAST design". Flight International. 20 February 1996.
"Hover and out: UK Royal Navy retires the Sea Harrier". FlightGlobal. 28 March 2006. Retrieved 20 January 2020.

globalsecurity.org (Global: 443^rd place; English: 435^th place)

"Tiltrotor". www.globalsecurity.org. Retrieved 20 October 2019.

harvard.edu (Global: 18^th place; English: 17^th place)

ui.adsabs.harvard.edu

Laskowitz, I. B. (1961). "Vertical Take-Off and Landing (Vtol) Rotorless Aircraft with Inherent Stability". Annals of the New York Academy of Sciences. 93 (1): 3–24. Bibcode:1961NYASA..93....3L. doi:10.1111/j.1749-6632.1961.tb30485.x. ISSN 0077-8923. S2CID 84160729.

marinecorpstimes.com (Global: 5,376^th place; English: 3,193^rd place)

Cavas, Christopher P. "F-35B STOVL fighter goes supersonic." Archived 14 July 2011 at the Wayback Machine Marine Corps Times, 15 June 2010. Retrieved 15 June 2010.

maritimefoundation.uk (Global: low place; English: low place)

"The genius of the naval jump-jet". The Maritime Foundation. 31 October 2019. Retrieved 20 January 2020.

nasa.gov (Global: 75^th place; English: 83^rd place)

"NASA – NASA Dryden Technology Facts – Lunar Landing Research Vehicle". www.nasa.gov. Archived from the original on 23 December 2018. Retrieved 29 April 2021.

nationalacademies.org (Global: 7,189^th place; English: 6,078^th place)

nap.nationalacademies.org

Le Bris, G. et al. (2022). "ACRP Research Report 236: Preparing Your Airport for Electric Aircraft and Hydrogen Technologies". Transportation Research Board, Washington, DC: https://nap.nationalacademies.org/catalog/26512/preparing-your-airport-for-electric-aircraft-and-hydrogen-technologies

nationalinterest.org (Global: 1,953^rd place; English: 1,522^nd place)

Roblin, Sebastien (13 October 2018). "The Royal Navy Is Back (Thanks to the F-35 and Two New Aircraft Carriers)". National Interest. Retrieved 20 January 2020.

nih.gov (Global: 4^th place; English: 4^th place)

ncbi.nlm.nih.gov

Woodbridge, Ewan; Connor, Dean T.; Verbelen, Yannick; Hine, Duncan; Richardson, Tom; Scott, Thomas B. (28 June 2023). "Airborne gamma-ray mapping using fixed-wing vertical take-off and landing (VTOL) uncrewed aerial vehicles". Frontiers in Robotics and AI. 10. doi:10.3389/frobt.2023.1137763. ISSN 2296-9144. PMC 10337992. PMID 37448876.

pubmed.ncbi.nlm.nih.gov

Woodbridge, Ewan; Connor, Dean T.; Verbelen, Yannick; Hine, Duncan; Richardson, Tom; Scott, Thomas B. (28 June 2023). "Airborne gamma-ray mapping using fixed-wing vertical take-off and landing (VTOL) uncrewed aerial vehicles". Frontiers in Robotics and AI. 10. doi:10.3389/frobt.2023.1137763. ISSN 2296-9144. PMC 10337992. PMID 37448876.

openlibrary.org (Global: 325^th place; English: 255^th place)

Barbara S. Esker (1990). Performance characteristics of a one-third-scale, vectorable ventral nozzle for SSTOVL aircraft. [Washington, D.C.]: NASA. ISBN 9780760770917. OCLC 24990569. OL 17630526M.

pbs.org (Global: 198^th place; English: 154^th place)

"X-planes". PBS: Nova transcript. Retrieved 9 January 2010.

seattlebusinessmag.com (Global: low place; English: low place)

Virgin, Bill (December 2017). "Plimp, a Plane-Blimp Hybrid, Is Looking to Disrupt the Drone Market – Seattle brothers James and Joel Egan are adding a new airship to the drone market, and it could be available as soon as next year". Seattle Business Magazine. Retrieved 16 November 2021.

semanticscholar.org (Global: 11^th place; English: 8^th place)

api.semanticscholar.org

Laskowitz, I. B. (1961). "Vertical Take-Off and Landing (Vtol) Rotorless Aircraft with Inherent Stability". Annals of the New York Academy of Sciences. 93 (1): 3–24. Bibcode:1961NYASA..93....3L. doi:10.1111/j.1749-6632.1961.tb30485.x. ISSN 0077-8923. S2CID 84160729.

space.com (Global: 936^th place; English: 713^th place)

Kjelgaard, Chris (Senior Editor). "From Supersonic to Hover: How the F-35 Flies." space.com, 21 December 2007.

spaceflightnow.com (Global: 2,930^th place; English: 2,204^th place)

"Reusable rocket prototype almost ready for first liftoff". Spaceflight Now. 9 July 2012. Retrieved 13 July 2012. SpaceX has constructed a half-acre concrete launch facility in McGregor, and the Grasshopper rocket is already standing on the pad, outfitted with four insect-like silver landing legs.

spacex.com (Global: 6,194^th place; English: 5,551^st place)

"Grasshopper Completes Highest Leap to Date". SpaceX.com. 10 March 2013. Archived from the original on 29 April 2013. Retrieved 11 March 2013.

twitter.com (Global: 23^rd place; English: 32^nd place)

"SpaceX Twitter post". Twitter. Retrieved 29 April 2021.

web.archive.org (Global: 1^st place; English: 1^st place)

V-22 Osprey Pocket Guide Archived 29 December 2010 at the Wayback Machine. Bell Boeing, 2007. Retrieved 17 April 2010.
Cavas, Christopher P. "F-35B STOVL fighter goes supersonic." Archived 14 July 2011 at the Wayback Machine Marine Corps Times, 15 June 2010. Retrieved 15 June 2010.
O'Connor, Kate (12 July 2018). "Opener Reveals Ultralight eVTOL". AVweb. Archived from the original on 27 January 2023. Retrieved 13 July 2018.
"NASA – NASA Dryden Technology Facts – Lunar Landing Research Vehicle". www.nasa.gov. Archived from the original on 23 December 2018. Retrieved 29 April 2021.
"Grasshopper Completes Highest Leap to Date". SpaceX.com. 10 March 2013. Archived from the original on 29 April 2013. Retrieved 11 March 2013.
"Report: F-35 Work Falls Behind Two More Years." Archived 2009-07-27 at the Wayback Machine CQ Politics, 23 July 2009.

worldcat.org (Global: 5^th place; English: 5^th place)

search.worldcat.org

Laskowitz, I. B. (1961). "Vertical Take-Off and Landing (Vtol) Rotorless Aircraft with Inherent Stability". Annals of the New York Academy of Sciences. 93 (1): 3–24. Bibcode:1961NYASA..93....3L. doi:10.1111/j.1749-6632.1961.tb30485.x. ISSN 0077-8923. S2CID 84160729.
Barbara S. Esker (1990). Performance characteristics of a one-third-scale, vectorable ventral nozzle for SSTOVL aircraft. [Washington, D.C.]: NASA. ISBN 9780760770917. OCLC 24990569. OL 17630526M.
Woodbridge, Ewan; Connor, Dean T.; Verbelen, Yannick; Hine, Duncan; Richardson, Tom; Scott, Thomas B. (28 June 2023). "Airborne gamma-ray mapping using fixed-wing vertical take-off and landing (VTOL) uncrewed aerial vehicles". Frontiers in Robotics and AI. 10. doi:10.3389/frobt.2023.1137763. ISSN 2296-9144. PMC 10337992. PMID 37448876.

yak.ru (Global: low place; English: low place)

"Vertical take-off/landing aircraft: Yak-38". www.yak.ru. Yakovlev Design Bureau. 16 July 2008. Retrieved 29 April 2021.

youtube.com (Global: 9^th place; English: 13^th place)

Grasshopper 744m Test | Single Camera (Hexacopter), 12 October 2013, retrieved 29 April 2021

VTOL (English Wikipedia)

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