download for free as you like...
http://www.elodieroux.com/EditionsElodieRouxBonus_Reports.html#AncreHELICO
Helicopter: how it works, description, applications, rotor equations,
performances, ...

enjoy !

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Les Éditions Élodie Roux
www.elodieroux.com

thanks to your remark, the link to the pdf also works for firefox


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Les Éditions Élodie Roux
www.elodieroux.com