<SENDER_EMAILfrederickmoreno@bigpond@@com.png> On my non-P non-turbo Lancair IV, empty weight 1984 pounds, short wings with no winglets, nearly full fuel, 400 pounds of pork in the front seats, gathering data and calibrating the AOA, we established Vs = 77 knots and Vso = 69 knots.  Using AOA, final approach speeds range from 95 nearly empty to 110 when stuffed full of fuel, pork, and baggage.   Fred Moreno         -------Original Message-------   From: Robert R Pastusek Date: 12/08/2013 12:01:43 PM To: Lancair Mailing List Subject: RE: [LML] Re: Flaps on take-off?   That is very close to the speeds for N-437RP (my Lancair IV-P), but not exactly. A good starting point, but please recall that these airplanes are all hand-built and no two are alike. I would strongly suggest getting one of the experienced test pilots within our community to test fly and determine the stall speeds for your individual airplane.   Bob P   From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of F. Barry Knotts L-IV-P   Vs = 80 KIAS, Vso = 71 KIAS.  (Measured by professional test pilot!)  No data on partial flaps. Barry Knotts On 8/10/2013 12:02 AM, Paul Miller wrote: Does anyone have the stall speeds for IV: flaps up versus takeoff flaps?