REFLECTOR: VG's

[John Abraham]

Kurt,

 

The VG's will lower the stall speed 5-7KIAS if placed in both the main wing
and the canard.  Just on the main wing will be a little less. (never place
them on just the canard)  Typically if you see them on the main wing only it
is because of the aircraft having a heavier engine in the back and it helps
the main wing lift more to load up the canard better for flight stability.
A 173 however will generally not require them because you are already
generating more lift for the weight of the aircraft compared to the STD or
XL.  They serve more as a buffer for landings and will reduce the takeoff
roll slightly.  You should be fine without them.  You want to find out where
your canard stall speed is at altitude and go from there.  That will
determine your approach speed.  

 

                      John Abraham

Chief Pilot, Executive V.P. Sales and Marketing

         Description: 4103

                  200 W. Airport Drive

                  Sebastian, FL 32958

             <http://www.velocityaircraft.com/> www.velocityaircraft.com

                  (P): 772-589-1860

                  (F): 772-589-1893

 

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of nmflyer1 at aol.com
Sent: Thursday, June 07, 2012 12:01 PM
To: reflector at tvbf.org
Subject: REFLECTOR: VG's

 

New thread off of the testing of 44DX.  

 

I am split right down the middle on whether to install VG's on my 173 FGE,
325HP Aluminum V-6. 

Most of my flying is out of High Density Altitude Airports. 

It is 10AM here, and the density altitude is already 7000', my home field
length 4400'

 

I know VG's would lower critical speeds. What I do not know is if I will
need them with the extra power. 

I could just wait until flight testing to make the decision. See how it
flies without.  

Just thought I would try and get some input from people that routinely fly
out of high density altitude airports. 

 

Thanks, 

 

Kurt

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