Perry Mick wrote:

Ducted fan fans:

I flight tested my new duct yesterday.  You can read about it
at:

Perry J. Mick
Mick Duckt N7XR
http://www.ductedfan.com

Perry,

Lance Nitschke wrote:

Have you considered using suction doors on your ducts?  If you look at
pictures of a Harrier or B-52H you'll see what I'm talking about.  Anyway,
at high power settings and low airspeeds, these spring loaded doors will
open to allow more airflow to the fan and improve the low speed thrust.  At
higher airspeeds the doors spring closed because there is enough air
supplied due to ram effect.  It seems that these suction doors could help
your duct #3.

Lance Nitschke
Enid, OK
http://www.hcom.net/personal/thenitch

The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org