Russ & mayf;
Thanks for the details of the "blown wing" concept. Maybe hot exhaust gasses
from header collectors could provide some downforce if they exited under a
properly shaped belly pan? Hmmm.....
Regards, Neil Tucson, AZ
-----Original Message-----
From: DrMayf [mailto:drmayf@teknett.com]
Sent: Wednesday, May 14, 2003 6:08 AM
To: Russel Mack; Albaugh, Neil; 'Landspeed Louise Ann Noeth'; 'Land Speed
List'
Subject: Re: hypersonic LSR
Blown airfoils....generally refers o the exhaust of the jet being routed
over the upper surface of the wing to enhance lift at low aircraft speeds.
Boeing built one for competetion with the McDonnel Douglass C17, it was the
YC 14. Two big jimundo engines hung way out front of the wing with the
exhaust blowing right over the top. Puppy could atke off in about a 1000 ft
or so and land at 600 or so. NASA has a similar one but way smaller flying
today. There may be other configurations where the xhaust is routed to slots
or some such to pass the air over the wing but the concept is pretty
similar.
mayf
----- Original Message -----
From: "Russel Mack" <rtmack@concentric.net>
To: "Albaugh, Neil" <albaugh_neil@ti.com>; "'Landspeed Louise Ann Noeth'"
<landspeedlouise@adelphia.net>; "'Land Speed List'"
<land-speed@autox.team.net>
Sent: Tuesday, May 13, 2003 2:13 AM
Subject: RE: hypersonic LSR
> Neil, Louise, List:
> I remember talk of the "blown" wing, also, but never learned enough to
> understand how it is supposed to work.
>
> Some time ago there were experiments doing the opposite-- sucking the
> turbulent boundary layer into the airframe, to establish laminar flow
> in areas that wouldn't otherwise be laminar. I think I heard that the
> experiments worked, but that the holes tended to plug-up.
>
> But what this "blown helium" idea sounds like to me is the navy
experiments
> in blowing air into the water at the front of boats and submarines, to
> provide a less dense media to run-through. It sounds wierd, but I
> think I remember reading that it actually works.
>
> Now where can I put that helium bottle on my bike? OOH, maybe a
> mixture with H2--?? Russ, $1226B
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