Today's Message Index:
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1. 04:20 PM - Re: High speed taxi tests: good or bad idea? (txpilot)
2. 04:45 PM - Re: High speed taxi tests: good or bad idea? (kmccune)
3. 04:55 PM - Re: Re: High speed taxi tests: good or bad idea? (n801bh@netzero.com)
4. 04:56 PM - Re: Re: High speed taxi tests: good or bad idea? (n801bh@netzero.com)
5. 05:00 PM - Re: Re: High speed taxi tests: good or bad idea? (fritz)
Message 1
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| Subject: | Re: High speed taxi tests: good or bad idea? |
Wow! Thanks to all who responded on the subject. Tommy - that was a great video.
Thanks for that.
I decided to accomplish the high-speed taxi tests and I'm glad I did. It behaved
just as everyone said it would. The nose came up prior to reaching 20 mph
and I was able to pop a 'wheelie' down the runway at about 2800 rpm. The airplane
definitely needs lots of right rudder at such a high angle of attack and
low speed.
Regarding the slats, it is practically an 'on-off' switch. My theory: these aren't
your typical leading edge slats that protrude below the lower camber of
the wing. Chris Heintz designed them to be streamlined to the wing at low angles
of attack. The air really doesn't 'see' them. Once the angle of attack is
increased, they do their job by directing accelerated airflow over the top camber
of the wing. I believe that's why there's a danger of popping in the air
unexpectedly, especially at higher speeds.
I wasn't up for doing rabbit hops down the runway as I believe in stabilized approach
criteria. That being said, I must confess the airplane did its first 'unofficial'
flight by climbing 2 inches off the ground on the first rotation.
Nevertheless, it was a good experience for me to get used to my airplane and
a good confidence builder for my first official flight.
Thanks again,
Dan Ginty
N787DG
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=315061#315061
Message 2
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| Subject: | Re: High speed taxi tests: good or bad idea? |
Ben,
This is good stuff can you remove the do not archive?
Kevin
n801bh(at)netzero.com wrote:
> Here is may take on the 701/801 flying habits.
> A slatted wing will behave predictably till you hit the critical angle of attack.
Then the slats start to 'breath' and funnel air over the top surface of the
wing. At that point the plane gets twitchy and wants to fly at an accellerated
rate and pitch movements through the controls will be laser precise. If you
over correct and get the plane leveled off too quickly the reverse happens and
the wing quits flying and the nose will drop. This all happens in a very narrow
speed range which just happens to present itself when fast taxiing at just
under flying speed. The 701/801 design is different then in any other plane
in that at rotation it either wants to jump in the air with a positive rate
of climb or linger at a wings level attitude if you don't rotate properly. It
is not dangerous,,,,,, just real different then any other plane you will ever
fly.
> Just my humble opinion after flying my 801 for 400 hours...... I LOVE my 801
!!!!!!!!!!!!!!
> Ben.
> do not archive
>
>
> Ben Haas
> N801BH
> www.haaspowerair.com
>
> --------
--------
Always do what you are afraid to do.
R.W. Emerson (1803-1882)
"Real freedom is the sustained act of being an individual." WW - 2009
"Life is a good deal...it's worth it"
Dorothy McCune
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=315062#315062
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| Subject: | Re: High speed taxi tests: good or bad idea? |
Congrats on the "first flight".
Getting daylight under the tires of a plane you built is a life changing
moment you will never forget...
do not archive
Ben Haas
N801BH
www.haaspowerair.com
---------- Original Message ----------
From: "txpilot" <txpilot@consolidated.net>
Subject: Zenith701801-List: Re: High speed taxi tests: good or bad idea?
.net>
Wow! Thanks to all who responded on the subject. Tommy - that was a gr
eat video. Thanks for that.
I decided to accomplish the high-speed taxi tests and I'm glad I did. I
t behaved just as everyone said it would. The nose came up prior to rea
ching 20 mph and I was able to pop a 'wheelie' down the runway at about
2800 rpm. The airplane definitely needs lots of right rudder at such a
high angle of attack and low speed.
Regarding the slats, it is practically an 'on-off' switch. My theory:
these aren't your typical leading edge slats that protrude below the low
er camber of the wing. Chris Heintz designed them to be streamlined to
the wing at low angles of attack. The air really doesn't 'see' them. O
nce the angle of attack is increased, they do their job by directing acc
elerated airflow over the top camber of the wing. I believe that's why
there's a danger of popping in the air unexpectedly, especially at highe
r speeds.
I wasn't up for doing rabbit hops down the runway as I believe in stabil
ized approach criteria. That being said, I must confess the airplane di
d its first 'unofficial' flight by climbing 2 inches off the ground on t
he first rotation. Nevertheless, it was a good experience for me to get
used to my airplane and a good confidence builder for my first official
flight.
Thanks again,
Dan Ginty
N787DG
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=315061#315061
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Message 4
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| Subject: | Re: High speed taxi tests: good or bad idea? |
Hopefully this will work..
Here is may take on the 701/801 flying habits.
A slatted wing will behave predictably till you hit the critical angle
of attack.
Then the slats start to 'breath' and funnel air over the top surface of
the wing. At that
point the plane gets twitchy and wants to fly at an accellerated rate an
d pitch movements
through the controls will be laser precise. If you over correct and get
the plane leveled
off too quickly the reverse happens and the wing quits flying and the no
se will drop.
This all happens in a very narrow speed range which just happens to pres
ent itself when
fast taxiing at just under flying speed. The 701/801 design is differen
t then in any
other plane in that at rotation it either wants to jump in the air with
a positive rate
of climb or linger at a wings level attitude if you don't rotate properl
y. It is not
dangerous,,,,,, just real different then any other plane you will ever f
ly.
Just my humble opinion after flying my 801 for 400 hours...... I LOVE my
801
Ben Haas
N801BH
www.haaspowerair.com
____________________________________________________________
Moms Asked to Return to School
Grant Funding May Be Available to Those That Qualify.
http://thirdpartyoffers.netzero.net/TGL3241/4cae5da8d13c114dd62st04vuc
Message 5
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| Subject: | Re: High speed taxi tests: good or bad idea? |
Dan--very well said and congratulations!!!! I believe you experienced what
we were tring to put in writing.
my opinion only--- practice what you have been doing----- than get some
altitude on that first flight----
"altitude is insurance"
You said: "I wasn't up for doing rabbit hops down the runway as I believe
in stabilized approach criteria."
I agree with you 100%, some folks will disagree.
Fritz ----- do not archive
----- Original Message -----
From: "txpilot" <txpilot@consolidated.net>
Sent: Thursday, October 07, 2010 7:17 PM
Subject: Zenith701801-List: Re: High speed taxi tests: good or bad idea?
> <txpilot@consolidated.net>
>
> Wow! Thanks to all who responded on the subject. Tommy - that was a
> great video. Thanks for that.
>
> I decided to accomplish the high-speed taxi tests and I'm glad I did. It
> behaved just as everyone said it would. The nose came up prior to
> reaching 20 mph and I was able to pop a 'wheelie' down the runway at about
> 2800 rpm. The airplane definitely needs lots of right rudder at such a
> high angle of attack and low speed.
>
> Regarding the slats, it is practically an 'on-off' switch. My theory:
> these aren't your typical leading edge slats that protrude below the lower
> camber of the wing. Chris Heintz designed them to be streamlined to the
> wing at low angles of attack. The air really doesn't 'see' them. Once
> the angle of attack is increased, they do their job by directing
> accelerated airflow over the top camber of the wing. I believe that's why
> there's a danger of popping in the air unexpectedly, especially at higher
> speeds.
>
> I wasn't up for doing rabbit hops down the runway as I believe in
> stabilized approach criteria. That being said, I must confess the
> airplane did its first 'unofficial' flight by climbing 2 inches off the
> ground on the first rotation. Nevertheless, it was a good experience for
> me to get used to my airplane and a good confidence builder for my first
> official flight.
>
> Thanks again,
>
> Dan Ginty
> N787DG
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=315061#315061
>
>
>
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