REFLECTOR: Vortilions and/or VG's?

[Chuck Jensen]

Jim, I buy your story about the vertilions and VGs performing different
functions.  Though I believe/think that I recall a posting by SBaker, or
someone of that ilk, that indicated if the VGs were used, the vertilions
were less essential.  Doubtlessly, the vertilions and lower winglets
have coincident function.
 
Chuck
 
-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Chuck Jensen
Sent: Tuesday, July 19, 2005 5:13 PM
To: Velocity Aircraft Owners and Builders list
Subject: RE: REFLECTOR: Vortilions and/or VG's?


The CW seems to be that VGs are expected to reduce stall by 5-7kts,
which for the XLRG with IO-540 engine is appreciated due to the extra
weight equating to extra speed at stall.  And, if VGs are installed,
that the utility of the vertilions is reduced or eliminated.  Also, if
your winglets extend below the bottom of the wing, that too will
allegedly reduces spanwise air flow.  This information and 50 cents will
get you a half a cup of coffee.
 
Chuck 
 
 
-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Al Gietzen
Sent: Tuesday, July 19, 2005 4:45 PM
To: 'Velocity Aircraft Owners and Builders list'
Subject: RE: REFLECTOR: Vortilions and/or VG's?



i can't speak for the 173 but on my XL-RG which I believe is the same 

wing (if you are a LW) I do not have either VG's or Vortilons. i Have 

never flown the airplane with them and have not gotten around to 

installing them to find out if there is a difference. Airplane flies 

great as is.

 

 

Since the vortilons are there to create a vortex over the wing at high
AOA (aid in keeping the flow attached and breaking up spanwise flow),
logic would suggest that VGs on the wing are a more effective means of
doing the same thing.

 

Gee, Ron, I guess it's up to you to fly without and with and let us know
the difference:-).

 

Awaiting pics of that new paint job . . 

 

Al

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