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flap takeoff
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slyck(at)frontiernet.net
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PostPosted: Sun Jul 30, 2006 8:43 am    Post subject: flap takeoff Reply with quote

Group, after finding little on the subject, I humbly seek advice.
OK, I really like the flaps (only one notch so far) for landing.
Very gentle touchdowns. But now I'm wondering about one
notch takeoffs? Sure, those SUV/MKIIIs with 90 hp will leap
off like a feather so configured, but I seek the experience of
those who have used them while powered with a lesser
powerplant. This would be, of course, lightly loaded, solo.
-BB
do not archive


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PostPosted: Sun Jul 30, 2006 10:03 am    Post subject: flap takeoff Reply with quote

Quote:
From: robert bean <slyck(at)frontiernet.net>
Reply-To: kolb-list(at)matronics.com
To: kolb-list(at)matronics.com
Subject: flap takeoff
Date: Sun, 30 Jul 2006 12:42:21 -0400



Group, after finding little on the subject, I humbly seek advice.
OK, I really like the flaps (only one notch so far) for landing.
Very gentle touchdowns. But now I'm wondering about one
notch takeoffs? Sure, those SUV/MKIIIs with 90 hp will leap
off like a feather so configured, but I seek the experience of
those who have used them while powered with a lesser
powerplant. This would be, of course, lightly loaded, solo.
-BB
do not archive


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dhkey(at)msn.com
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PostPosted: Sun Jul 30, 2006 10:03 am    Post subject: flap takeoff Reply with quote

Robert,
I like cleaning it up before I took off with my 582 and a Mark III. Just
felt like it worked better, no science on the subject. Once with a passenger
I took off with one notch, it seemed like it took A LOT longer to get off
the ground. Even solo I clean it up before take off.
Dave

do not archive
Quote:
From: robert bean <slyck(at)frontiernet.net>
Reply-To: kolb-list(at)matronics.com
To: kolb-list(at)matronics.com
Subject: flap takeoff
Date: Sun, 30 Jul 2006 12:42:21 -0400



Group, after finding little on the subject, I humbly seek advice.
OK, I really like the flaps (only one notch so far) for landing.
Very gentle touchdowns. But now I'm wondering about one
notch takeoffs? Sure, those SUV/MKIIIs with 90 hp will leap
off like a feather so configured, but I seek the experience of
those who have used them while powered with a lesser
powerplant. This would be, of course, lightly loaded, solo.
-BB
do not archive


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APilot(at)webtv.net
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PostPosted: Sun Jul 30, 2006 10:13 am    Post subject: flap takeoff Reply with quote

I have taken of with none, one notch and full. No problem with any
setting. Climb seems the same with none and one notch. Probably
because with one notch, more air gets to the lower arc of the prop. It
does not seem to climb efficiently with full flaps. With more
horsepower, it would probably be fine.


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John Hauck



Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)

PostPosted: Sun Jul 30, 2006 2:27 pm    Post subject: flap takeoff Reply with quote

| But now I'm wondering about one
| notch takeoffs? | -BB

BB/Gang:

I find the MKIII takes off and climbs much better without the use of
flaps.

However, there are times when flaps will assist in getting the MKIII
off the ground quicker, i.e., flying off soft, rough, wet, sandy
fields. I usually start my ground roll clean. When the AIS needle
swings through 30 mph, I snatch in full flaps. The MKIII usually pops
right off the ground. Soon as it breaks ground, I slowly push them
back up to the clean position.

At times I use one notch, 20 degs of flaps to get me out of my short
field. That is when my max gross take off weight is pushing 1,200
lbs. 20 degs of flaps gives me more latitude to stay above stall,
although it is not climbing as quickly nor moving as fast across the
ground as it would when loaded much lighter. I have to make a 90 deg
right or left turn on takeoff to the north from my strip if I am
loaded to heavily to climb straight out over the tall trees to the
north.

I never attempt to take off and continue to climb out with full flaps.
Not a good idea. Does not work. If the mkIII is stalled with full
flaps at low level, it is likely not going to be able to recovered
before you bounce off the ground.

john h
mkIII


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Titus, Alabama
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boyter(at)mcsi.net
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PostPosted: Sun Jul 30, 2006 4:52 pm    Post subject: flap takeoff Reply with quote

Robert
I like cleaning it up before I took off with my 582 and a Mark III. Just
felt like it worked better, If I had a engine out on take off I would not
like the flaps on.
I have 450 hrs.
Wayne
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Eugene Zimmerman



Joined: 10 Jan 2006
Posts: 392

PostPosted: Sun Jul 30, 2006 6:25 pm    Post subject: flap takeoff Reply with quote

On Jul 30, 2006, at 8:50 PM, Wayne Boyter wrote:

Quote:
, If I had a engine out on take off I would not like the flaps on.
I have 450 hrs.
Wayne

There is one really good effect of having some flaps on take off.

All the high thrust-line kolbs have one very significant
vulnerability that is commonly overlooked.

That is ,,, should a "SUDDEN" engine out ever occur while in a very
steep typical Kolb climb, the adequate nose down rotation that is
required to prevent an inadvertent stall from this attitude and
airspeed is extremely difficult to achieve without the rotational
help of flaps.

For this reason I also prefer a trim setting on takeoff that
requires that I hold some back stick pressure until adequate altitude
is reached
Experiment with it sometime at altitude.


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PostPosted: Sun Jul 30, 2006 8:12 pm    Post subject: flap takeoff Reply with quote

Thanks for all the input.
-BB

On 30, Jul 2006, at 8:50 PM, Wayne Boyter wrote:

[quote]

Robert
I like cleaning it up before I took off with my 582 and a Mark III.
Just
felt like it worked better, If I had a engine out on take off I would
not like the flaps on.
I have 450 hrs.
Wayne
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PostPosted: Mon Jul 31, 2006 7:20 am    Post subject: flap takeoff Reply with quote

Just a further comment on flaps. Those of us that fly the MKIII with stock
length gear legs have a limited angle of attack when on the ground. I use
one notch of flap every time I take off (except in high winds). This
increases the effective angle of attack. Then just after lift off I retract
the flaps. The short gear legs limit the angle of attack. Kolb designed our
planes this way to keep us safer by making sure we are well over stall speed
before take off. The down side is it increases the take off roll and speed.

Sorry if I get long winded but... I just got my biannual check ride. This is
my once every two years ride in a C172. Afterwards I shared my forced
landing experience in MKIIIc with him. I started to tell him how I used the
flaps to adjust my glide path to get me where I wanted to land (kind of like
a negative throttle) and fully retracted them for landing. He stopped me and
said you never never raise your flaps on approach. We then got into a heavy
discussion about flap usage. He finally conceded that it might work in one
of "those" Kolbs but not in a GA aircraft. I obviously need to take him up
in my Kolb and should have done it right then in the C172 but at close to
$100 per hour it wasn't worth it.

For those of you that haven't tried it get some altitude and find a landing
spot. Pull the throttle back and establish a glide. Then grab the flap
handle and add some flap. Be aware that as you add flap you need to push
forward on the stick to increase your decent rate to keep your airspeed up.
When you raise the flaps pull back. Don't lock the flaps in a notch just
play with it a bit. Watch were the touch point changes when you add or
decrease the flaps. You may need to change your grip but pull in full flaps
and be sure you nose down quickly. You will be surprised how much you can
adjust your glide slope. Be sure you don't get into that airspeed area where
you might stall if you raise the flaps. Most of us fly an approach well
above stall speed and decreasing flaps decreases the angle of attack but be
careful especially near the ground. Don't forget there are other tools you
can and should use like circling and S turns. My point is use every tool you
can to make a safe landing.

My personal forced landing rule is that I will retract all the flaps once I
have the field made. This makes my MKIIIc land more like it does during my
normal landing where I use one notch of flap and maintain some power.

One last point most instructors have a set of rules that they teach everyone
and this is very good. But like most rules they are base lines that you may
be able to deviate from. Don't blindly follow these rules if bending them
can save your life. Education and experience can help here but remember
there is one rule you can't break and that is that gravity will bite you if
you screw up.

Rick Neilsen
Redrive VW powered MKIIIc

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Richard Pike



Joined: 09 Jan 2006
Posts: 1670
Location: Blountville, Tennessee

PostPosted: Mon Jul 31, 2006 8:03 am    Post subject: flap takeoff Reply with quote

You did good. Several years ago when I got the clog in my oil line and
the 582 died, I was right off the end of a paved RC model strip (Yes,
Amazing Grace is amazing...) and knew I had the strip made, but since it
was short and I figured I would only get one shot at it, I used the
flaps exactly as you describe to adjust the glide slope. Worked very well.
However, since my home strip is only 750' long, I always land with full
flaps, and even at "real airports", I always use full flaps, that way I
am programmed to anticipate how it will land every time.
What did the instructor say about power off stalls & recovery in a Kolb?
"At the break, add power..." Another fertile area for discussion...

Richard Pike
MKIII N420P (420ldPoops)

Richard & Martha Neilsen wrote:
Quote:

<NeilsenRM(at)comcast.net>

Just a further comment on flaps. Those of us that fly the MKIII with
stock length gear legs have a limited angle of attack when on the
ground. I use one notch of flap every time I take off (except in high
winds). This increases the effective angle of attack. Then just after
lift off I retract the flaps. The short gear legs limit the angle of
attack. Kolb designed our planes this way to keep us safer by making
sure we are well over stall speed before take off. The down side is it
increases the take off roll and speed.

Sorry if I get long winded but... I just got my biannual check ride.
This is my once every two years ride in a C172. Afterwards I shared my
forced landing experience in MKIIIc with him. I started to tell him
how I used the flaps to adjust my glide path to get me where I wanted
to land (kind of like a negative throttle) and fully retracted them
for landing. He stopped me and said you never never raise your flaps
on approach. We then got into a heavy discussion about flap usage. He
finally conceded that it might work in one of "those" Kolbs but not in
a GA aircraft. I obviously need to take him up in my Kolb and should
have done it right then in the C172 but at close to $100 per hour it
wasn't worth it.

For those of you that haven't tried it get some altitude and find a
landing spot. Pull the throttle back and establish a glide. Then grab
the flap handle and add some flap. Be aware that as you add flap you
need to push forward on the stick to increase your decent rate to keep
your airspeed up. When you raise the flaps pull back. Don't lock the
flaps in a notch just play with it a bit. Watch were the touch point
changes when you add or decrease the flaps. You may need to change
your grip but pull in full flaps and be sure you nose down quickly.
You will be surprised how much you can adjust your glide slope. Be
sure you don't get into that airspeed area where you might stall if
you raise the flaps. Most of us fly an approach well above stall speed
and decreasing flaps decreases the angle of attack but be careful
especially near the ground. Don't forget there are other tools you can
and should use like circling and S turns. My point is use every tool
you can to make a safe landing.

My personal forced landing rule is that I will retract all the flaps
once I have the field made. This makes my MKIIIc land more like it
does during my normal landing where I use one notch of flap and
maintain some power.

One last point most instructors have a set of rules that they teach
everyone and this is very good. But like most rules they are base
lines that you may be able to deviate from. Don't blindly follow these
rules if bending them can save your life. Education and experience can
help here but remember there is one rule you can't break and that is
that gravity will bite you if you screw up.

Rick Neilsen
Redrive VW powered MKIIIc



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John Hauck



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Location: Titus, Alabama (hauck's holler)

PostPosted: Mon Jul 31, 2006 8:33 am    Post subject: flap takeoff Reply with quote

| What did the instructor say about power off stalls & recovery in a
Kolb?
| "At the break, add power..." Another fertile area for discussion...
|
| Richard Pike

Rev/Gang:

Recovery from a stall in a Kolb is a no brainer. Wink Usually,
relaxing your grip on the stick will take care of that little problem.
However, be surprised how many folks will pull the stick back and try
to make the airplane fly when they inadvertently stall near the
ground. Some only get to try that once.

Reference forced landings and flaps in a mkIII: I'll do what ever it
takes to get me down in one piece. Probably the best way to survive a
forced landing is a lot of practice forced landings, dead stick. I
don't know any other way to do it better. Kolbs are entirely
different animals with the prop spinning at idle and with the prop not
spinning at all.

john h
mkIII


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hauck's holler
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PostPosted: Mon Jul 31, 2006 9:42 am    Post subject: flap takeoff Reply with quote

Rick,

<<He stopped me and said you never never raise your flaps on approach.>>

Have the same discussion with a CFI who is glider rated. He/she will
immediately understand how you are using flaps in the same manner as
spoilers. The trick, of course is to maintain your (hopefully constant)
airspeed well above stall when you do retract the flaps.

Tom Kuffel (yeah, CFI with a glider rating, but FAI not FAA)
Whitefish, MT
Building Original Firestar.


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Dave Pelletier



Joined: 10 Jan 2006
Posts: 100
Location: Prescott, Arizona

PostPosted: Mon Jul 31, 2006 10:14 am    Post subject: flap takeoff Reply with quote

Quote:
Kolbs are entirely
different animals with the prop spinning at idle and with the prop not
spinning at all.

john h
mkIII

I agree. Before I ever took up a passenger, a requirement I made for myself
was that I'd do six "ignition off" landings. I did and each one of them was
a hard landing. Fortunately not hard enough to bend the gear legs. I did
this with my Firestar and the landings were fine. I'm not sure why the hard
landings with the MKIII. Seems like I had plenty of airspeed, especially
with the last three. The nose would come up but the airplane wouldn't flare
and would "pancake" in.

I think it was because of two things. . My fear of ballooning and not
having power available to "goose" it probably meant that I was reluctant to
pull back hard enough on the stick. 2. Not having propeller air flow over
the elevator probably made for a less effective elevator. Figured I'd
better quit before I did serious damage.

AzDave
Quote:







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John Hauck



Joined: 09 Jan 2006
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PostPosted: Mon Jul 31, 2006 10:27 am    Post subject: flap takeoff Reply with quote

I'm not sure why the hard
| landings with the MKIII. Seems like I had plenty of airspeed,
especially
| with the last three. The nose would come up but the airplane
wouldn't flare
| and would "pancake" in.
|
| AzDave

Dave:

Got to keep above the stall or it will quit flying.

For best results the mains should be close to the ground, like inches.

john h
mkIII


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Richard Pike



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Posts: 1670
Location: Blountville, Tennessee

PostPosted: Mon Jul 31, 2006 11:20 am    Post subject: flap takeoff Reply with quote

Actually, what I was hoping to instigate was a dialogue comparing the a
Kolb stall to the typical mantra that most instructors will give you
when you do a power off stall in a C172 or such. Something like, "As the
nose drops, you ease the stick forward while adding power to arrest the
descent."

I have a good friend who is a CFI, and several years ago we went for the
first of several biannuals in the MKIII. He is of the school that a
nibble and a buffet is not a stall. To him, a power off stall is a
"whee, there-goes-the-nose" stall, and that is what he wanted to see a
recovery from - a genuine stall. Works for me, those are the ones that
bite you. When he noticed that I waited until I had substantially
recovered from the stall before putting the throttle in, he remarked
that "I would lose less altitude if I put the throttle in immediately at
the break."
I suggested to him that with the MKIII's high thrust line, if it got a
big dose of throttle while seriously stalled, the recovery could be a
lot more exciting. I said that in a low altitude stall especially,
getting the nose down and getting it solidly flying again was more
important than getting the power in ASAP. So his modified instructions
were - as soon as it feels like it is flying is a good time to add power.

This got me wondering about SOP for power off stall recovery on a Lake
Amphibian, and apparently they have very large stabilizer trim tabs
located in the prop blast to preclude such questions.
http://www.seaplanes.org/gateway/seaplane_smpl.htm
http://aircraftinnovation.com/training/instr-techniques.html

Anyway, that was the "fertile area for discussion." Or not.

Richard Pike
MKIII N420P (420ldPoops)

do not archive

John Hauck wrote:
Quote:

| What did the instructor say about power off stalls & recovery in a
Kolb?
| "At the break, add power..." Another fertile area for discussion...
|
| Richard Pike

Rev/Gang:

Recovery from a stall in a Kolb is a no brainer. Wink Usually,
relaxing your grip on the stick will take care of that little problem.
However, be surprised how many folks will pull the stick back and try
to make the airplane fly when they inadvertently stall near the
ground. Some only get to try that once.

Reference forced landings and flaps in a mkIII: I'll do what ever it
takes to get me down in one piece. Probably the best way to survive a
forced landing is a lot of practice forced landings, dead stick. I
don't know any other way to do it better. Kolbs are entirely
different animals with the prop spinning at idle and with the prop not
spinning at all.

john h
mkIII








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Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0

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PostPosted: Mon Jul 31, 2006 1:32 pm    Post subject: flap takeoff Reply with quote

Richard

I saw your comment about the stall recovery but I never talked about it with
my CFI. Personally I don't like stalls. I don't do them and don't practice
them. I know I should but... What I do is practice not doing them. There are
a number of things that they have us do in the check ride that doesn't make
sense to me. Yes my CFI also wants to see much more than a nibble or a
buffet. In normal flight I'm never going to feel a nibble or a buffet and
blunder on into a full blown stall. The only time this might happen is when
I'm close to the ground like takeoff or landing. How stupid? No I do
practice slow flight down to the point where my airplane is telling me
WARNING you push me any further and I will stall.Then I recover as quickly
as possible. Another big test all CFIs seem to want is fly a 45 degree bank
turn without gaining or loosing altitude. What does that do for us? Again in
normal flight we never do this. On occasion I do high bank turns like they
want you to do landing to the north/west at Oshkosh but I'm flying a
approach profile not holding altitude.

Granted there are some reasonable things they have us do during the biannual
but most of it is just a pain in the.....

Maybe John W. could enlighten us. He is a CFI and I'm sure he has had to
jump thru many more hoops as a airline captain than we have to.

Sorry I will stop my rant.

Do not archive

Rick Neilsen
Redrive VW powered MKIIIc

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PostPosted: Wed Aug 02, 2006 10:41 am    Post subject: flap takeoff Reply with quote

My landings are hard too. Everything looks fine and I expect it to
settle in on three points. But, it doesn't settle....just
drops.......bam. It is worse with no flaps. Carrying a little power
makes things much easier, but I prefer power off landings. At 2000 rpms
(smooth idle), the thrust is 20 lbs. and I imagine that it simulates the
dynamics of a stopped prop landing. Will find out more when I start my
ignition off landing practice.


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John Hauck



Joined: 09 Jan 2006
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Location: Titus, Alabama (hauck's holler)

PostPosted: Wed Aug 02, 2006 11:03 am    Post subject: flap takeoff Reply with quote

|
|
| My landings are hard too. Everything looks fine and I expect it to
| settle in on three points. But, it doesn't settle....just
| drops.......bam.
APilot:

The airplane is landing exactly like any airplane lands. If you are
too high when it stalls, it will quit flying, and hit hard. If you
place the airplane a few inches off the ground, hold it until it
stalls, it will land nice and gentle.

At 2000 rpms
| (smooth idle), the thrust is 20 lbs. and I imagine that it simulates
the
| dynamics of a stopped prop landing.

Not quite. The slowly rotating prop acts just as though it were a
large disc, creating a lot of drag. When the prop is stopped, the
only drag experienced is the actual area of each blade. There is a
lot of difference between dead stick and engine idling landings.

My own personal experience only. However, most Kolbs fly very much
alike.

john h
mkIII


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John Hauck
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hauck's holler
Titus, Alabama
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PostPosted: Wed Aug 02, 2006 1:14 pm    Post subject: flap takeoff Reply with quote

APilot

John is right, stabilize your approach and fly it down to just a few inches
off the ground and it will settle in nice and smooth. The problem is holding
that approach down just till just that right point a few inches above the
ground before you flair. If you are used to big general aviation airplanes
you will have more problems doing this than any one else because you are
used to airplanes that have allot more inertia than a MKIII. Getting a good
landing with no power isn't easy. The more flaps you use with no power the
more difficult it will be. I can't say this enough till you are used to your
airplane "you need to carry power all the way in till you are inches above
the ground". Hold the stick steady and cut the power and it will raise the
nose all by its self just a bit and settle in nice as can be. Do this till
have it down cold. THEN start using less and less power but don't rush this
part.

I like to land with some power all the time with one notch of flaps. But do
what makes you happy and safe. One notch of flap cuts the stall speed a bit
and the float in ground effect. Also a Kolb MKIIIc will land with no power
(off, stopped, dead) with no flaps just about like it does with some power
and one notch of flap.

Rick Neilsen
Redrive VW powered MKIIIc

---


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PostPosted: Wed Aug 02, 2006 2:18 pm    Post subject: flap takeoff Reply with quote

When I startred flying my Kolb MkIII, my landings were inconsistent. For the purposes of this missive, inconsistent is defined as, do five landings or less, remove gear legs, straighten same, and reinstall. I'm reeeaaaaal good at straightening gear legs.
This went on through the winter and into the spring. I was pretty bummed and one day while I was on the phone with Travis, I told him I was having problems, I just couldn't seem to get my flair right. I would land perfectly once or twice, then WHAM, time to go see Mr. Press again.
"You've got to learn to wheel land this airplane and stop trying to three point it. You learn to wheel land this airplane and you'll like it just fine."
Travis, I am convinced, is a genius. I dug out my copy of "The Compleat Taildragger Pilot" by Harvey S. Plourde. Whatta ya know, "learn to wheel land the taildragger first, then advance to three point landings". Mr.Plourde's reason? Basically, with the wheel landing, you're more likely to get a landing rather than an arrival. Okay, that's a little terse, but it's the essence.
I started working on wheel landings, I bounced a little, but not too bad or too high and I never slammed in again. My landings got smoother. Quite a bit of the improvement was due to my hands and feet slowly evolving from large hams to instruments capable of a bit of delicacy. Now I can truly say that Yesterday, I couldn't spell taildragger pilot, today I are one.
Mr. Press is very, very lonely.

Rick

On 8/2/06, Richard & Martha Neilsen <NeilsenRM(at)comcast.net (NeilsenRM(at)comcast.net)> wrote:[quote]--> Kolb-List message posted by: "Richard & Martha Neilsen" < NeilsenRM(at)comcast.net (NeilsenRM(at)comcast.net)>

APilot

John is right, stabilize your approach and fly it down to just a few inches
off the ground and it will settle in nice and smooth. The problem is holding
that approach down just till just that right point a few inches above the
ground before you flair. If you are used to big general aviation airplanes
you will have more problems doing this than any one else because you are
used to airplanes that have allot more inertia than a MKIII. Getting a good
landing with no power isn't easy. The more flaps you use with no power the
more difficult it will be. I can't say this enough till you are used to your
airplane "you need to carry power all the way in till you are inches above
the ground". Hold the stick steady and cut the power and it will raise the
nose all by its self just a bit and settle in nice as can be. Do this till
have it down cold. THEN start using less and less power but don't rush this
part.

I like to land with some power all the time with one notch of flaps. But do
what makes you happy and safe. One notch of flap cuts the stall speed a bit
and the float in ground effect. Also a Kolb MKIIIc will land with no power
(off, stopped, dead) with no flaps just about like it does with some power
and one notch of flap.

Rick Neilsen
Redrive VW powered MKIIIc

---


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