Mailing List lml@lancaironline.net Message #68877
From: Jeff Edwards <vtailjeff@aol.com>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] Legacy Takeoff Performance at High Elevation Airports?
Date: Sat, 04 Jan 2014 09:24:34 -0500
To: <lml@lancaironline.net>
Charlie,

How hard did you step on the brakes? ;) Results may vary.

Jeff

Sent from my iPad

> On Jan 3, 2014, at 8:51 AM, Charles Brown <browncc1@verizon.net> wrote:
>
> Valin,  I noted (and share) Dennis Johnson's impression that Legacy landing distance is actually longer (typically) than takeoff so I ran the numbers for landing as well as takeoff at Taos.  Takeoff notes repeated for convenience:
>
> KSKX (Taos) -- elevation 7100; field length 5800; slight down slope on Rwy 22.  Distance figures are integrated V dt from my Garmin data logger.  
>
> Takeoff with a full load:  Roll: 1960 ft.   Takeoff field length to 35' alt:   3200 ft.    Weight 2300 lb, temp 19C / 66F.  Wind was negligible; full power ramped in over 2-3 sec, flaps 10.
>
> Landing with trip fuel expended:  Roll: 1810 feet.  Landing field length from 35' alt:   3270 feet.  Weight 2100 lb, temp 30C / 86F.  Headwind component 7kt.  IAS was 90kt at 35' altitude, flaps 40, braking was normal, not aggressive.  
>
> The lighter landing weight is pretty typical for a trip somewhere because you'll normally land with trip fuel expended and take off fully fueled.   So I'll wildly assert that for a normal out-and-back trip, takeoff and landing field lengths may be roughly equal.  That fits with my feeling that landing field length is longer (at the same weight) than takeoff.  The Legacy lands like most other airplanes but on takeoff it accelerates like a Bat Out Of Somewhere Very Hot.
>
> Charley Brown
> Legacy / IO-550
> --
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