cost/benefit ratio in a production environment??
>
> From: "Russell Duffy" <russell.duffy@gmail.com>
> Date: 2006/09/17 Sun PM 08:12:42 CDT
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: ducted fan questions
>
> All the GenAv duct attempts I could dig
> up wound up ditching the duct and going back to a prop, some after
> significant time and expense.
>
>  
> Hi Donald,
>  
> Thanks for the comments.  I've also noticed an huge lack of examples of GA
> ducted fans, and that usually tells you something important :-)  
>  
> I've been led to believe that ducted fans had some thrust advantages at low
> airspeeds, but that they generally wouldn't work well at normal GA type
> cruise speeds.  Since a gyrocopter is a slow aircraft, that lives for
> thrust, it just seems like it would possible work.  On the other hand, it's
> probably worth noting that there aren't any fan units out there for Rotax
> engines on gyros, or pusher ultralights for that matter.  
>  
> Cheers,
> Rusty
>  
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