owl with no eyes?

Andy wrote:
Ralph Jones wrote:
Before you can shoot it down you have to SEE it. If it's made of
fiberglass, forget seeing it on radar,

It's made of carbon fiber, which I assume makes it more visible than
fiberglass would.


Ah yes - the saving grace of the Sparrow Hark. Other glass gliders can
be seen on radar because the conrol pushrods have a significant RCS.
The Sparrow Hawk strategically uses string instead.

Actually, aramid fiber cables for the rudder and ailerons; pushrods for
the elevator and spoilers. The only "string" in it is the yaw string!

--
Eric Greenwell - Washington State, USA
Change "netto" to "net" to email me directly

"Transponders in Sailplanes" on the Soaring Safety Foundation website
www.soaringsafety.org/prevention/articles.html

"A Guide to Self-launching Sailplane Operation" at www.motorglider.org

Earlier, Eric Greenwell wrote:

Actually, aramid fiber cables for the rudder and ailerons; pushrods for
the elevator and spoilers. The only "string" in it is the yaw string!

Aramid? I thought they were of one of the UHMW polyethelene products
like Spectra or Dyneema.

Bob K.

"Bob Kuykendall" wrote in message
s.com...
Earlier, Eric Greenwell wrote:

Actually, aramid fiber cables for the rudder and ailerons; pushrods for
the elevator and spoilers. The only "string" in it is the yaw string!

Aramid? I thought they were of one of the UHMW polyethelene products
like Spectra or Dyneema.

Bob K.


Interesting. Arimids tend to turn to dust when exposed to UV.

UHMWPE (Spectra/Dyneema) wouldn't make good control cables since it "creeps"
under constant load and loses tension. Maybe Technora?

Bill D

Bill Daniels wrote:
"Bob Kuykendall" wrote in message
s.com...
Earlier, Eric Greenwell wrote:

Actually, aramid fiber cables for the rudder and ailerons; pushrods for
the elevator and spoilers. The only "string" in it is the yaw string!
Aramid? I thought they were of one of the UHMW polyethelene products
like Spectra or Dyneema.

Bob K.


Interesting. Arimids tend to turn to dust when exposed to UV.

UHMWPE (Spectra/Dyneema) wouldn't make good control cables since it "creeps"
under constant load and loses tension. Maybe Technora?

The cable info came from the Windward Performance website. The cables
are internally mounted, of course, so I don't think they get very much
UV. Perhaps the cable has a UV resistant covering - I don't remember the
brand name, though.


--
Eric Greenwell - Washington State, USA
Change "netto" to "net" to email me directly

"Transponders in Sailplanes" on the Soaring Safety Foundation website
www.soaringsafety.org/prevention/articles.html

"A Guide to Self-launching Sailplane Operation" at www.motorglider.org