REFLECTOR: Velocity video
John Dibble
aminetech at bluefrog.com
Thu Jan 31 08:55:06 CST 2008
My understanding for the standard fuselage is 70 kn at gross weight, or
heavy weight up front and 60 kn solo/low fuel. In practice my stall
speed is around 60 kn either solo or 2 up front. I don't have much
experience landing at full load. I know my pitot is accurate in climb
out at 1500-2000 fpm.
In the flare, the 55 kn refers to the main wing. The canard still flies
at that speed and I don't know how low the stall speed is. There are
two factors that lower the canard stall speed. First is ground effect
which lowers the stall speed. The second, I believe, is the elevator.
It seems to me that with the elevator in the down (trim up) position, it
acts like a flap and reduces the canard stall speed. The further down
the elevator is, the lower the stall speed should be. I don't know how
far down my elevator is in the flare because I haven't been able to look
while landing. I know it is further down at full stop than if I landed
at a higher speed.
John
lawrence epstein wrote:
> A canard stall speed <55 knots for an SE is much lower than I would
> expect. I thought that the standard wing/fuselage was expected to mush
> around 70 and the large wing/standard fuselage ("173") @ 60 knots. AM
> I confusing knots with MPH?
>
> Is it possible that this is pitot error at low speed/hight AOA?
>
> Larry Epstein
> 173 FGE
>
>
>
>
> -------------------------------------------------------------
> Date: Wed, 30 Jan 2008 22:36:36 -0600
> From: aminetech at bluefrog.com
> To: reflector at tvbf.org
> Subject: Re: REFLECTOR: Velocity video
>
> OK. I should begin with the pattern as I feel everything
> adds up when it comes to a good landing. First of all, keep
> the pitch trimmed for hands off throughout the final leg.
> Speed brakes aren't needed. If you're high on final, just
> pull back on the stick and slow down to stall speed. The
> initial nose up attitude will make it seem like you're going
> to fly to the next county, but in several seconds you will
> be pleasantly surprised to be on the glide slope. My power
> off stall is a mush, so I barely notice anything when
> stalling on final. However an observer on the ground told
> me it looked like I was falling out of the sky. My stall
> speed is 60 kn and I have found no problems being at 60 kn
> on short final/round out. After round out I let it sink
> down, holding it a ft or less off the ground. At 55 kn, the
> mains slowly sink and gently touch down with no pilot input
> while the canard keeps flying (guess that is a deep stall,
> but not a problem when you're close to the ground). Then I
> nudge the stick forward to get the nose coming down and it
> is real easy to lower it gently to the ground.
> As far as the canard stalling and the nose slamming the
> ground, I have had many hard nose landings at higher
> speeds. I think the main cause is not having the pitch
> trimmed for hands off at all times during the landing
> procedure. The trim spring greatly limits how much you can
> move the elevator and makes it difficult to let the canard
> down easy, making it seem like the canard stalled when in
> fact you just couldn't pull back as fast or much as
> necessary. I will caution when in LEVEL flight, not to trim
> the pitch for hands off at a speed of less than 80 kn as
> that could result in a deep stall. However when in the
> flare, trimming at slower speeds is OK, since you want the
> mains to stall first.
> Keep in mind that I fly an SERG. The XLs may behave
> differently. John
> cgputney at peoplepc.com wrote:
>
> John Dibble, please detail your landing flare
> procedure for us! Thanks.
>
> ----- Original Message -----
> From:John Dibble
> To: Velocity Aircraft Owners and
> Builders list
> Sent: Sunday, January 27, 2008 9:31 AM
> Subject: Re: REFLECTOR: Velocity video
> Steve, It took me almost 400 hours of
> flying to learn that not only can I land
> my SERG in a flare, but that it is 5
> times easier and 10 times softer
> landing.
> John
> steve korney wrote:
>
> Guess that dispelled the myth
> that you can't land a Velocity
> in a flair............ Best...
> Steve
>
>
> ---------------------
> From:
> johnt at comp-sol.com
> To:
> reflector at tvbf.org
> Date: Sat, 26 Jan
> 2008 10:35:07 -0600
> Subject: Re:
> REFLECTOR: Velocity
> video
> This is one of those
> 'big smile' videos!
>
> Thanks for sharing.
>
> John
> ---------------------
> From:
> reflector-bounces at tvbf.org
> [reflector-bounces at tvbf.org]
> On Behalf Of Al
> Gietzen
> [ALVentures at cox.net]
>
> Sent: Friday,
> January 25, 2008
> 10:54 PM
> To: reflector
> Subject: REFLECTOR:
> Velocity video
> For those who like;
> I’ll share some
> video made by my son
> (with my 5 yr old
> grandson who’s nuts
> about airplanes).
> It includes a
> takeoff, flyby,
> touch and go, and
> landing; lasts about
> 8 minutes, and is
> 20MB non-streaming,
> so high speed access
> will certainly be a
> plus.
> http://photofu.com/darryl/Velocity_Vignette.wmv
>
> Enjoy;
>
> Al
>
> -------------------------------
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