Today's Message Index:
----------------------
1. 05:39 AM - Re: Building Kolb MK III XTRA !!! // Props. (Earl & Mim Zimmerman)
2. 06:19 AM - Re: Noise Reduction (Richard Pike)
3. 06:24 AM - Re: FLAPS ??? Kolb MK III XTRA .... (Vic Peters)
4. 07:46 AM - Nose Cone - Duct Tape Time (b young)
5. 08:27 AM - Re: Noise Reduction (Richard & Martha Neilsen)
6. 08:37 AM - Re: Nose Cone - Duct Tape Time (Terry Frantz)
7. 11:22 AM - Re: FLAPS ??? Kolb MK III XTRA .... (Richard & Martha Neilsen)
8. 11:28 AM - Two or Three Blade Propellers (Jack B. Hart)
9. 01:15 PM - Re: Two or Three Blade Propellers (Earl & Mim Zimmerman)
10. 06:03 PM - Re: Nose Cone - Duct Tape Time (Larry Bourne)
11. 07:20 PM - Trivia (ray anderson)
Message 1
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| Subject: | Re: Building Kolb MK III XTRA !!! // Props. |
--> Kolb-List message posted by: Earl & Mim Zimmerman <emzi@supernet.com>
Richard Pike wrote:
> --> Kolb-List message posted by: Richard Pike <richard@bcchapel.org>
>
> I have tried several props on my MKIII, Ivo 3-blade, 2-blade, Warp
> 3-blade, Kiev Hot Prop - I have found the best performance (on a 582,
> 2.58:1 B box) with an Ivo 2 blade 68" prop. I have not tried a Warp Drive
> Taper prop, but would love to try a 68" 2 blade and see how it stacks up
> performance wise against the Ivo.
My friend Joel tried the 68" Warp Taper on his 582 MKIII to see if he
could get any better cruise, but he soon put the 68" Ivo back on, both
were two blade props. If Ivo had the same blades for left hand rotation
I would have one on my Rans S6 also! ~ Earl
--
Checked by AVG Free Edition.
Message 2
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| Subject: | Re: Noise Reduction |
--> Kolb-List message posted by: Richard Pike <richard@bcchapel.org>
The owner of the FSII in the hanger next door had an ANR retrofit kit
installed in his David Clark headset and I tried it out Monday when I flew
his airplane. Incredible difference. The kit sells from Aircraft Spruce
(and other places) for about $160 bucks. Well worth it. The noise seems to
be cut in half, or better.
Question: the Radio Shack earphones you got, are they the kind you plug
into a Walkman? Then you could not only have less noise, but listen to music?
Richard Pike
MKIII N420P (420ldPoops)
do not archive
At 11:32 PM 11/8/05 -0500, you wrote:
>--> Kolb-List message posted by: "Richard & Martha Neilsen"
><NeilsenRM05@comcast.net>
>
>I have been dealing with a noisy airplane since I lowered the thrust line
>with my new engine mount. For most of the summer I have been flying with ear
>plugs under my headphones. This has cut the noise but caused communication
>problems. I have had some success in reducing the noise but not enough. I
>have been considering updated noise canceling headphones but they are
>expensive. Yesterday I bought some cheep noise reduction in you ear phones
>($20). They work! They cut the noise and boy can I hear the radio. I bought
>Radio Shack ear phones they are really Koss "sparkplugs" they aren't that
>great but they prove that the concept works. The only problem I'm having is
>only one earphone works. I need to find a mono to stereo adapter plug.
>
>If you have a good headset but they don't reduce the noise enough you might
>want to consider these ear bud style ear phones for use under the headphone.
>They are designed to reduce the out side noise level so that you can hear
>music. Some of them have noise canceling cercuittry. Sony makes a line of
>reasonable priced units that I'm going to try next. The Sony MDR-NC11 units
>are $50-150 depending on where you buy them and have noise canceling, Sony
>MDR-51LP or MDR-EX71SL are in the $30-40 range. If you want to spend more
>you can pay $400 plus.
>
>Richard Neilsen
>Redrive VW powered MKIIIc
>
>
Message 3
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| Subject: | Re: FLAPS ??? Kolb MK III XTRA .... |
--> Kolb-List message posted by: "Vic Peters" <vicsvinyl@verizon.net>
Ditto Mike! I just finished my flaperons. If there not flaps why don't they
just call them ailerons? I can tell you only one thing I'm sure of. You get
rid of a lot of tubing,hinges and a lot of extra rigin. Isn't that the whole
idea of these small planes, keep it simple?
Vic
Extra ready for covering
Millinocket, Maine
Do Not Archive
--
Checked by AVG Free Edition.
Message 4
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| Subject: | Nose Cone - Duct Tape Time |
--> Kolb-List message posted by: "b young" <by0ung@brigham.net>
The first nose over cracked the bottom of the nose cone but it was not
noticeable. This episode left noticeable cracks and they will have to
be repaired. So until it gets warm enough to work with fiber glass, the
FireFly will have duct tape on its nose.
--------------------
i think it is ok to work fiberglass in the cold... it just takes longer to
set up..... check the can to make sure on min, temps.
do not archive
boyd
Message 5
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| Subject: | Re: Noise Reduction |
--> Kolb-List message posted by: "Richard & Martha Neilsen" <NeilsenRM05@comcast.net>
Richard
I installed that same kit in my Sigtronics headset four or five years ago
and they worked well till I lowered my engine. Right now I think the noise
is coming from the prop tips being too close (2 inches) to the fuselage boom
tube????
Any way these ear phones reduce the noise just enough to give me a quiet
ride and yes they are designed for iPod MP3 player so they will play music
very well. I have one of the songs from Top Gun loaded in my MP3 player and
ready to go on my next flight.
Rick Neilsen
Redrive VW powered MKIIIc
----- Original Message -----
From: "Richard Pike" <richard@bcchapel.org>
Subject: Re: Kolb-List: Noise Reduction
> --> Kolb-List message posted by: Richard Pike <richard@bcchapel.org>
>
> The owner of the FSII in the hanger next door had an ANR retrofit kit
> installed in his David Clark headset and I tried it out Monday when I flew
> his airplane. Incredible difference. The kit sells from Aircraft Spruce
> (and other places) for about $160 bucks. Well worth it. The noise seems to
> be cut in half, or better.
>
> Question: the Radio Shack earphones you got, are they the kind you plug
> into a Walkman? Then you could not only have less noise, but listen to
> music?
>
> Richard Pike
> MKIII N420P (420ldPoops)
>
> do not archive
>
> At 11:32 PM 11/8/05 -0500, you wrote:
>
>>--> Kolb-List message posted by: "Richard & Martha Neilsen"
>><NeilsenRM05@comcast.net>
>>
>>I have been dealing with a noisy airplane since I lowered the thrust line
>>with my new engine mount. For most of the summer I have been flying with
>>ear
>>plugs under my headphones. This has cut the noise but caused communication
>>problems. I have had some success in reducing the noise but not enough. I
>>have been considering updated noise canceling headphones but they are
>>expensive. Yesterday I bought some cheep noise reduction in you ear phones
>>($20). They work! They cut the noise and boy can I hear the radio. I
>>bought
>>Radio Shack ear phones they are really Koss "sparkplugs" they aren't that
>>great but they prove that the concept works. The only problem I'm having
>>is
>>only one earphone works. I need to find a mono to stereo adapter plug.
>>
>>If you have a good headset but they don't reduce the noise enough you
>>might
>>want to consider these ear bud style ear phones for use under the
>>headphone.
>>They are designed to reduce the out side noise level so that you can hear
>>music. Some of them have noise canceling cercuittry. Sony makes a line of
>>reasonable priced units that I'm going to try next. The Sony MDR-NC11
>>units
>>are $50-150 depending on where you buy them and have noise canceling, Sony
>>MDR-51LP or MDR-EX71SL are in the $30-40 range. If you want to spend more
>>you can pay $400 plus.
>>
>>Richard Neilsen
>>Redrive VW powered MKIIIc
>>
>>
>
>
>
Message 6
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| Subject: | Re: Nose Cone - Duct Tape Time |
--> Kolb-List message posted by: Terry Frantz <tkrolfe@usadatanet.net>
Jack B. Hart wrote:
>--> Kolb-List message posted by: "Jack B. Hart" <jbhart@onlyinternet.net>
>
>FireFlyers & Kolbers,
>
>At the beginning of its 26th flight, I nosed the FireFly over on my first
>attempt to takeoff from a grass strip on December 19, 1999.
>
>The plus is that I nosed over a pusher, and so I do not have the added
>expense of new propeller blades.
>
>Jack B. Hart FF004
>Winchester, IN
>
>
>
>
Jack,
Welcome to the club. There are those that have already been there and
there are the rest that will join us sooner or later. The FireFly likes
to teach humility, especially with others watching.
This is the reason I made and placed a "Chicken hoop" under the nose of
my FireFly. Didn't want to repair or replace the fiberglass nose cone.
Have had only two occasions for it's use, but was I ever glad it was
there. Only had to touch up the paint on the hoop and a little on the
nose. I get negative comments about my hoop, but I just smile knowing
it works. Problem is that Kolb didn't design strong enough cross
members in the front of the cage to attach the hoop, so I welded in my
own 5/8" cross members to support it.
Spent too much time painting my bird with a complicated trim pattern to
have it messed up. Tall grass and soft mud and farmers fields will get
you even if you have the larger wheels as I do.
Good luck with the repair,
Terry - FireFly #95
Message 7
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| Subject: | Re: FLAPS ??? Kolb MK III XTRA .... |
--> Kolb-List message posted by: "Richard & Martha Neilsen" <NeilsenRM05@comcast.net>
Mike
Yes flaps like those on the classic are available for the Xtra. These are
the only options that I'm aware of. The standard flaperons work and are
somewhat lighter but not as effective. The classic type flaps are very
powerful and can get the inexperienced into trouble but are real nice to
have when needed. I used those flaps during my forced landing last summer to
get me exactly were I wanted to land. I have never flown with the flaperons
but have been told and watched them in use and they aren't very effective.
Rick Neilsen
Redrive VW powered MKIIIc
----- Original Message -----
From: "Michael Bigelow" <orcabonita@hotmail.com>
Subject: Kolb-List: FLAPS ??? Kolb MK III XTRA ....
> --> Kolb-List message posted by: "Michael Bigelow"
> <orcabonita@hotmail.com>
>
> Thanks for everyones input on my MK III XTRA project. One very important
> thing that someone mentioned is flaps... Which options are available on
> the
> XTRA and which is the best one ? I definately want flaps if possible,
> but
> are the flaperons better on the kolb than the normal flaps on the inside
> and
> ailerons on the outside setup ?
>
> MIKE...
>
>
>
Message 8
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| Subject: | Two or Three Blade Propellers |
--> Kolb-List message posted by: "Jack B. Hart" <jbhart@onlyinternet.net>
Kolbers,
I belive I have sent the jump to "AeroDesign Propeller Selector" to the
List, but if I have not, here it is again:
http://www.gylesaero.com/freeware/propcalc.shtml
This program lets you put in some of your own aircraft performance data and you
can "What if" to see how aircraft performance will change. Since John H.
put up some performance data, I inserted some of it into the program as follows:
"Air Speed" -> 80 mph
"RPM -> 2,058 (where I assumed the gear ratio was 2.43 divided into 5,000 engine
rpm
"Number of Blades" -> 3
"Prop Diameter" -> 72 inches
From Rotax I looked at the power curve for the 912ULS and picked off 90 hp
at 5,000 rpm. Next I increased "Blade Pitch" until the "Power Absorbed"
reached 90 hp. At this point the "Thrust" developed was 323 pounds.
Propeller "Efficiency" turned out to be 76.6%
Then I changed the "Number of Blades" -> 2. Since John's plane requires the
same amount of thrust to fly at the same speed, I increased "Blade Pitch"
until the "Thrust" value came back to the same value as before. But when
one looks at the "Power Absorbed" it has gone from 90 to 94 hp. And
propeller efficiency has dropped to 73.0%.
If this program is accurate in its predictions and since the 912ULS cannot
develop 94 hp at 5,000 rpm, it indicates that for the same throttle setting
one will have to settle for less cruise speed with the two blade propeller.
Jack B. Hart FF004
Winchester, IN
Message 9
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| Subject: | Re: Two or Three Blade Propellers |
--> Kolb-List message posted by: Earl & Mim Zimmerman <emzi@supernet.com>
Jack B. Hart wrote:
> If this program is accurate in its predictions and since the 912ULS cannot
> develop 94 hp at 5,000 rpm, it indicates that for the same throttle setting
> one will have to settle for less cruise speed with the two blade propeller.
>
> Jack B. Hart FF004
> Winchester, IN
>
That is not what my experience has found! I don't think that your
example is inaccurate on at least one point in that the "90 hp" that you
pulled from the Rotax power curve is probably 5000 rpm WOT and not an
accurate measure of the power used to obtain 5000 rpm at 80 mph with a 2
or 3 blade prop.
I agree with Mr. Pike. ~ Earl
> If your main priority is the best overall performance, go with a two blade
> prop. If your main priority is smoothness rather than performance, go with
> a three blade prop. If your main priority is a prop that survives parts of
> your airplane coming off and going through it, get a Warp Drive.
--
Checked by AVG Free Edition.
Message 10
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| Subject: | Re: Nose Cone - Duct Tape Time |
--> Kolb-List message posted by: "Larry Bourne" <biglar@gogittum.com>
A good outfit to check with would be System 3 Resins in the Northwest. I
have done fiberglass (epoxy) boat repairs in near freezing temps by using
floodlights held a couple of feet away from the curing resin. Be very sure
to check surface temps before walking away from it.
Done That Lar.
Larry Bourne
Palm Springs, CA
Building Kolb Mk III
N78LB Vamoose
www.gogittum.com
----- Original Message -----
From: "b young" <by0ung@brigham.net>
Subject: Kolb-List: Nose Cone - Duct Tape Time
> --> Kolb-List message posted by: "b young" <by0ung@brigham.net>
>
>
> The first nose over cracked the bottom of the nose cone but it was not
> noticeable. This episode left noticeable cracks and they will have to
> be repaired. So until it gets warm enough to work with fiber glass, the
> FireFly will have duct tape on its nose.
>
> --------------------
>
> i think it is ok to work fiberglass in the cold... it just takes longer
> to
> set up..... check the can to make sure on min, temps.
>
> do not archive
> boyd
>
>
>
Message 11
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--> Kolb-List message posted by: ray anderson <rsanoa@yahoo.com>
What the heck. While Kolb flying is slowing for the winter, I'll throw in a little
trivia. I was living in Manhattan Beach, CA during the 1960's and kept my
aircraft at Torrance Airport, just outside of LA.
My oldest son had learned to fly and my youngest was working after school as a
line boy at the airport. One fixed base operator, Dietrich Flying Service, had
a couple of Aeronca Champs and a Cessna 150. My son flew the 150 quite a bit
and the young one pushed it in and out of the hanger each day. My log shows me
flying it three times. Son did most of his in 1962-63 while I logged in 1965.
Been retired back here in middle Tenn. for over 40 yrs. Both sons live here
and my UltraStar shares a hanger with my sons Aeronca Chief. Yesterday my son
saw in a hanger just a couple of hundred yards away from ours, would you believe
after over 40 years, the old Deitrich 150 that we both flew many years ago
in So.Calif. We've been told we can fly it again. Small world.
DO NOT ARCHIVE
Anderson, UltraStar
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