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- Q689310 subject Q8227951.
- Q689310 subject Q8228057.
- Q689310 subject Q8443230.
- Q689310 abstract "A ducted fan is a propulsion arrangement whereby a mechanical fan, which is a type of propeller, is mounted within a cylindrical shroud or duct. The duct reduces losses in thrust from the tips of the props, and varying the cross-section of the duct allows the designer to advantageously affect the velocity and pressure of the airflow according to Bernoulli's Principle. Ducted fan propulsion is used in aircraft, airships, airboats, hovercraft and fan packs.Ducted fans normally have more and shorter blades than propellers and thus can operate at higher rotational speeds.".
- Q689310 thumbnail X-22a_onground_bw.jpg?width=300.
- Q689310 wikiPageWikiLink Q1031651.
- Q689310 wikiPageWikiLink Q1058834.
- Q689310 wikiPageWikiLink Q1081241.
- Q689310 wikiPageWikiLink Q1088655.
- Q689310 wikiPageWikiLink Q11436.
- Q689310 wikiPageWikiLink Q127771.
- Q689310 wikiPageWikiLink Q133585.
- Q689310 wikiPageWikiLink Q1337450.
- Q689310 wikiPageWikiLink Q1386229.
- Q689310 wikiPageWikiLink Q14613383.
- Q689310 wikiPageWikiLink Q15130765.
- Q689310 wikiPageWikiLink Q170877.
- Q689310 wikiPageWikiLink Q172858.
- Q689310 wikiPageWikiLink Q1755997.
- Q689310 wikiPageWikiLink Q181328.
- Q689310 wikiPageWikiLink Q182883.
- Q689310 wikiPageWikiLink Q185757.
- Q689310 wikiPageWikiLink Q193470.
- Q689310 wikiPageWikiLink Q206037.
- Q689310 wikiPageWikiLink Q210403.
- Q689310 wikiPageWikiLink Q210932.
- Q689310 wikiPageWikiLink Q2475583.
- Q689310 wikiPageWikiLink Q2634412.
- Q689310 wikiPageWikiLink Q2700567.
- Q689310 wikiPageWikiLink Q29261.
- Q689310 wikiPageWikiLink Q320599.
- Q689310 wikiPageWikiLink Q34486.
- Q689310 wikiPageWikiLink Q370906.
- Q689310 wikiPageWikiLink Q4688240.
- Q689310 wikiPageWikiLink Q5463565.
- Q689310 wikiPageWikiLink Q630010.
- Q689310 wikiPageWikiLink Q6498398.
- Q689310 wikiPageWikiLink Q654051.
- Q689310 wikiPageWikiLink Q72313.
- Q689310 wikiPageWikiLink Q723916.
- Q689310 wikiPageWikiLink Q7240.
- Q689310 wikiPageWikiLink Q743135.
- Q689310 wikiPageWikiLink Q7504293.
- Q689310 wikiPageWikiLink Q781742.
- Q689310 wikiPageWikiLink Q795064.
- Q689310 wikiPageWikiLink Q8227951.
- Q689310 wikiPageWikiLink Q8228057.
- Q689310 wikiPageWikiLink Q8443230.
- Q689310 wikiPageWikiLink Q922654.
- Q689310 comment "A ducted fan is a propulsion arrangement whereby a mechanical fan, which is a type of propeller, is mounted within a cylindrical shroud or duct. The duct reduces losses in thrust from the tips of the props, and varying the cross-section of the duct allows the designer to advantageously affect the velocity and pressure of the airflow according to Bernoulli's Principle.".
- Q689310 label "Ducted fan".
- Q689310 depiction X-22a_onground_bw.jpg.