Today's Message Index:
----------------------
1. 06:07 AM - Re: Kolb-List Digest: 13 Msgs - 09/05/10 (Bob Green)
2. 06:27 AM - Re: Kolb instructor (gd5052)
3. 06:59 AM - Corvair VS VW based engines (Mike Welch)
4. 06:59 AM - Re: Re: Kolb-List Digest: 13 Msgs - 09/05/10 (John Hauck)
5. 07:39 AM - Re: Re: Kolb-List Digest: 13 Msgs - 09/05/10 (russ kinne)
6. 08:03 AM - Re: Re: Kolb-List Digest: 13 Msgs - 09/05/10 (Mike Welch)
7. 11:16 AM - Re: Re: Kolb-List Digest: 13 Msgs - 09/05/10 (Dana Hague)
8. 01:19 PM - Re: Re: Kolb-List Digest: 13 Msgs - 09/05/10 (Richard Neilsen)
9. 01:21 PM - Re: Kolb Aircraft's new model (JetPilot)
10. 01:32 PM - Re: safety pins (JetPilot)
11. 01:59 PM - Re: safety pins (JetPilot)
12. 02:36 PM - Re: Re: Kolb-List Digest: 13 Msgs - 09/05/10 (Richard Girard)
Message 1
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| Subject: | RE: Kolb-List Digest: 13 Msgs - 09/05/10 |
In the matter of the Corvair engine... Weight and prop tip speed are defin
ite negatives on a MKIII. The Great Plains VW conversion with a re-drive f
rom Valley Engineering are a good option. Rick Neilsen has flow his VW re-
drive as a pioneer for over ten years. Craig Spoke is happy with his MKII
IX with VW and I am moving toward finishing my MKIIIX using the GPAS VW wit
h re-drive within the next few months. My 2180cc engine develops 103hp @42
00RPM Take-off power and cruises @ about 3200 RPM. It has dual ignition.
The Kolb facotry is working very seriously toward offering the VW conversio
n as an engine option.
Just my opinion...
Bob
N830PB
Message 2
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| Subject: | Re: Kolb instructor |
I'm going to build the XTRA
--------
Gary Cornell
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=311522#311522
Message 3
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| Subject: | Corvair VS VW based engines |
>My 2180cc engine develops 103hp @4200RPM
> The Kolb factory is working very seriously toward offering the VW convers
ion as an engine option.
> Bob
Bob=2C
Very nice set-up. Roughly=2C how much money do you have invested in the
Great Plains motor? Have you
had it running yet?
Did you have to modify the cage to accomodate the VW mount? How much did
the redrive cost that Gene
made ( @ Valley Engineering)?
I know of at least "one" other guy that is thinking of a VW engine change
-out.
Mike Welch
Message 4
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| Subject: | Re: RE: Kolb-List Digest: 13 Msgs - 09/05/10 |
My 2180cc engine develops 103hp @4200RPM Take-off power and cruises @ about
3200 RPM. It has dual ignition. The Kolb facotry is working very seriously
toward offering the VW conversion as an engine option.
Just my opinion...
Bob
N830PB
Bob G/Gang:
Looks good!
Everytime I look at a VW with your redrive setup I look at the tensioner
pulley. Seems that is probably a critical component. If it fails, the prop
stops producing thrust.
Does the manufacturer give customers a "time life" on that item?
As a side note, hitting the road for the Rock House within the hour. Still
walking with a cane, although I can walk some without it. Looking forward
to seeing a lot of my flying friends on this road trip. I'll be driving the
most direct route from Titus, Al, to Burns Junction, OR. Will take me
through:
Nashville, TN
St Louis, MO
Kansas City, KS
Lincoln, NE
Cheyenne, WY
Brigham City, UT
Boise, ID
Rock House, Burns Junction, OR
Be glad to share a cup of coffee with anyone along the way. I'll be
checking my email regularly, and my cell phone is:
334-315-2621
Take care,
john h
mkIII
Message 5
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| Subject: | Re: RE: Kolb-List Digest: 13 Msgs - 09/05/10 |
BON VOYAGE, 'OLD' PAL1
Fair winds to you
Russ
Message 6
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| Subject: | RE: Kolb-List Digest: 13 Msgs - 09/05/10 |
> Everytime I look at a VW with your redrive setup I look at the tensioner
> pulley. Seems that is probably a critical component. If it fails=2C the p
rop
> stops producing thrust.
> john h
> mkIII
John=2C and others=2C
If I'm not mistaken=2C millions of cars use an idler pulley (for belt ten
sion).
Why would you assume this to be a cause for concern.
If a prop threw a blade=2C it would stop producing thrust=2C too. I know
one
that did.
Just curious to know why an idler pulley is a weak point.
Mike Welch
Message 7
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| Subject: | Re: RE: Kolb-List Digest: 13 Msgs - 09/05/10 |
I'm not familiarwith that particular design, but bearings are one
component of modern machinery for which, if properly used, the life
can be predicted with a high degree of accuracy. It shouldn't be any
more failure prone than any other part of the powerplant package.
If it's on the back side of the belt, causing a reverse bend, that
must be accounted for in the belt life, though.
-Dana
--------------------------------------------------
Mike Welch <mdnanwelch7@hotmail.com> wrote:
(09/06/2010 11:01)
> If I'm not mistaken, millions of cars use an idler pulley (for belt tension).
> Why would you assume this to be a cause for concern.
>
> If a prop threw a blade, it would stop producing thrust, too. I know one
> that did.
>
> Just curious to know why an idler pulley is a weak point.
Message 8
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| Subject: | Re: RE: Kolb-List Digest: 13 Msgs - 09/05/10 |
Bob/All
The trick is to get those stated RPMs. With my prop/pitch settings I get
about 3500RPM full throttle on take off and cruise at 3200. Depending on
your prop you may have to compromise on those RPMs.
Keep us up to date on your progress. I didn't realize you were so far along.
Looks great.
To answer John's comment, the tensioner is very robust but does it have a
life limit. Unknown? I would guess there are single points of failure on
most engines. Rotax certainly has had a lot of experience to show up any
problems that the VWs can't compare to. Yet!
Rick Neilsen
1st Redrive VW Powered MKIIIC
On Mon, Sep 6, 2010 at 9:05 AM, Bob Green <bgreen@bimi.org> wrote:
> In the matter of the Corvair engine... Weight and prop tip speed are
> definite negatives on a MKIII. The Great Plains VW conversion with a
> re-drive from Valley Engineering are a good option. Rick Neilsen has flow
> his VW re-drive as a pioneer for over ten years. Craig Spoke is happy with
> his MKIIIX with VW and I am moving toward finishing my MKIIIX using the GPAS
> VW with re-drive within the next few months. My 2180cc engine develops
> 103hp @4200RPM Take-off power and cruises @ about 3200 RPM. It has dual
> ignition. The Kolb facotry is working very seriously toward offering the VW
> conversion as an engine option.
> Just my opinion...
> Bob
> N830PB
Message 9
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| Subject: | Re: Kolb Aircraft's new model |
mdnanwelch7(at)hotmail.co wrote:
> Travis, we love ya, Buddy!!! Kolb Aircraft just wouldn't be the same without
ya!!
>
>
I have gotten more parts and stuff from Travis than you can shake a stick at, he
can always find the right things for a Kolb. We do need to keep this quiet
though !!! It probably wont be long before Boeing gets wind of his talent at
securing parts and materials and sends some headhunter to offer Travis a 6 figure
salary, and then we will all be in trouble...
Mike
--------
"NO FEAR" - If you have no fear you did not go as fast as you could
have !!!
Kolb MK-III Xtra, 912-S
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=311572#311572
Message 10
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Dana wrote:
>
>
> Easy to install, but I've heard reports of the bent end rings working themselves
out under vibration.
>
> -Dana
>
The rings with the ends bent can most definitely work themselves off under vibration.
This seems like it would be impossible, but there are enough reliable
reports out there to know it can happen. I personally know a person this started
to happen to, luckily he could see this ring slowly starting to work itself
off, and was able to land before it was gone. He said the ring just very
slowly started to work off, and slowly kept going and going as he watched disbelief,
he found a place to land before it was gone.
Mike
--------
"NO FEAR" - If you have no fear you did not go as fast as you could
have !!!
Kolb MK-III Xtra, 912-S
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=311576#311576
Message 11
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Just to make it clear, I use the NON bent cotter rings on my Kolb, they are much
less likely to come off than safety pins. Safety pins can pop open by tall
grass, or anything that brushes up or pushes on them.
As far as the bent cotter rings for boats, sailboats do not experience the high
frequency, high amplitude vibrations throughout the hull that can work these
loose, so they are perfect for their purpose on boats, but not in planes.
Mike
--------
"NO FEAR" - If you have no fear you did not go as fast as you could
have !!!
Kolb MK-III Xtra, 912-S
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=311589#311589
Message 12
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| Subject: | Re: RE: Kolb-List Digest: 13 Msgs - 09/05/10 |
When I put Brute II primary belt drive system on my Shovelhead Harley I was
worried enough about the tensioner bearing that I bought a spare and packed
it into my road kit just in case. 16 years later it's still in my road kit
all safely packed in oiled paper. I once calculated that on average it runs
at about 14,000 RPM. Just make your tensioner a maintenance item and check
it on preflight. It'll probably outlast you.
Rick Girard
On Mon, Sep 6, 2010 at 3:14 PM, Richard Neilsen <neilsenrm@gmail.com> wrote:
> Bob/All
>
> The trick is to get those stated RPMs. With my prop/pitch settings I get
> about 3500RPM full throttle on take off and cruise at 3200. Depending on
> your prop you may have to compromise on those RPMs.
>
> Keep us up to date on your progress. I didn't realize you were so far
> along. Looks great.
>
> To answer John's comment, the tensioner is very robust but does it have a
> life limit. Unknown? I would guess there are single points of failure on
> most engines. Rotax certainly has had a lot of experience to show up any
> problems that the VWs can't compare to. Yet!
>
> Rick Neilsen
> 1st Redrive VW Powered MKIIIC
>
>
> On Mon, Sep 6, 2010 at 9:05 AM, Bob Green <bgreen@bimi.org> wrote:
>
>> In the matter of the Corvair engine... Weight and prop tip speed are
>> definite negatives on a MKIII. The Great Plains VW conversion with a
>> re-drive from Valley Engineering are a good option. Rick Neilsen has flow
>> his VW re-drive as a pioneer for over ten years. Craig Spoke is happy with
>> his MKIIIX with VW and I am moving toward finishing my MKIIIX using the GPAS
>> VW with re-drive within the next few months. My 2180cc engine develops
>> 103hp @4200RPM Take-off power and cruises @ about 3200 RPM. It has dual
>> ignition. The Kolb facotry is working very seriously toward offering the VW
>> conversion as an engine option.
>> Just my opinion...
>> Bob
>> N830PB
>
>
> *
>
>
> *
>
>
--
Zulu Delta
Kolb Mk IIIC
582 Gray head
4.00 C gearbox
3 blade WD
Thanks, Homer GBYM
It is not bigotry to be certain we are right; but it is bigotry to be unable
to imagine how we might possibly have gone wrong.
- G.K. Chesterton
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