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hesham said:A DTIC report has a treasure of projects and aircraft;
http://www.dtic.mil/dtic/tr/fulltext/u2/857462.pdf
From the same source.
hesham said:A DTIC report has a treasure of projects and aircraft;
http://www.dtic.mil/dtic/tr/fulltext/u2/857462.pdf
much quieter than a helicopter
30% to 60% more fuel efficient in forward flight than a helicopter
VTOLicious said:Wonder what's the difference to make this one successful? :
hesham said:A DTIC report has a treasure of projects and aircraft;
http://www.dtic.mil/dtic/tr/fulltext/u2/857462.pdf
grite13 said:A variant of the cycloidal propulsion systems was the twin cycloid proposed in East Germany in the early 1960's for a hybrid airship design known as the "Delfin Luftschiff". A fairly large model was built of the system and tested in a wind tunnel - I seem to remember Leipzig. Have never seen any of the results from the tests.
Jemiba said:Not absolutely sure, but I think, it is mentioned in "Luftschiffe die nie gebaut wurden". Will browse
the book, when I'm at home again during the weekend.
Jemiba said:Interesting find ! That's a study made by Bosch Aerospace, more can be found here
http://www.icas.org/ICAS_ARCHIVE/ICAS2014/data/papers/2014_0725_paper.pdf
and in the AHS paper here
http://cyclocopter.snu.ac.kr/paper/AHS_forum62.pdf