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Ken Potter
Joined: 18 Aug 2007
Posts: 85
Location: Lanark, Ontario
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 Posted: Mon Jun 29, 2009 4:23 am Post subject: Gear Box Ratio |
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Hi folks. I am trying to determine the ratio of my Rotax 582 C Box. The serial number on the front case is 7042. Does anyone know of site with serial number lookup to determine ratio from the numbers??
Cheers
Ken
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_________________
Ken Potter
Model II, No. 483
Rotax 582, C-Box,
99% Complete
C-FJKP
Lanark, Ontario |
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Tom Jones
Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA
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| Posted: Mon Jun 29, 2009 5:20 am Post subject: Re: Gear Box Ratio |
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Ken, I don't think there is any way to look up the gear ratio. It should be stamped on the front of the gear box right behind the prop and just above the drain plug. It will be one of these numbers, 2.62, 3.00, 3.47, or 4.10.
If yours doesn't have the ratio stamped you can count the engine revolutions with one turn of the prop flange. Look in the intake or pull the plugs and count the times the piston returns to the starting point with one complete revolution of the prop flange. Example, if it is less than 3 your ratio is 2.62. More than 3 and and less than 4, it is 3.47, etc.
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA |
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Lynn Matteson
Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan
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| Posted: Mon Jun 29, 2009 8:09 am Post subject: Gear Box Ratio |
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Isn't there an exposed flywheel that you can mark, and thereby get
the exact ratio?
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 687.3 hrs
Sensenich 62"x46" Wood prop
Electroair direct-fire ignition system
Status: flying
do not archive
On Jun 29, 2009, at 9:20 AM, Tom Jones wrote:
| Quote: |
Ken, I don't think there is any way to look up the gear ratio. It
should be stamped on the front of the gear box right behind the
prop and just above the drain plug. It will be one of these
numbers, 2.62, 3.00, 3.47, or 4.10.
If yours doesn't have the ratio stamped you can count the engine
revolutions with one turn of the prop flange. Look in the intake
or pull the plugs and count the times the piston returns to the
starting point with one complete revolution of the prop flange.
Example, if it is less than 3 your ratio is 2.62. More than 3 and
and less than 4, it is 3.47, etc.
--------
Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 50578#250578
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| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kitfox-List |
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_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM |
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akflyer
Joined: 07 May 2007
Posts: 574
Location: Soldotna AK
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| Posted: Mon Jun 29, 2009 8:40 am Post subject: Re: Gear Box Ratio |
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| Lynn Matteson wrote: | Isn't there an exposed flywheel that you can mark, and thereby get
the exact ratio?
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 687.3 hrs
Sensenich 62"x46" Wood prop
Electroair direct-fire ignition system
Status: flying
do not archive
On Jun 29, 2009, at 9:20 AM, Tom Jones wrote:
| Quote: |
Ken, I don't think there is any way to look up the gear ratio. It
should be stamped on the front of the gear box right behind the
prop and just above the drain plug. It will be one of these
numbers, 2.62, 3.00, 3.47, or 4.10.
If yours doesn't have the ratio stamped you can count the engine
revolutions with one turn of the prop flange. Look in the intake
or pull the plugs and count the times the piston returns to the
starting point with one complete revolution of the prop flange.
Example, if it is less than 3 your ratio is 2.62. More than 3 and
and less than 4, it is 3.47, etc.
--------
Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 50578#250578
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Yep, there is a nice big hole in the side of the gear box. Just mark the hardy joint and count how many times it turns with one prop revolution.
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kitfox-List |
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_________________
DO NOT ARCHIVE
Leonard Perry aka SNAKE
Soldotna AK
Avid "C" / Mk IV
582 (147 hrs and counting on the rebuild)
IVO IFA
Full Lotus 1450
#1 snake oil salesman since 1-22-2009
I would rather die trying to live, than to live trying not to die.... |
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jridgway
Joined: 12 Dec 2008
Posts: 64
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| Posted: Thu Jul 02, 2009 12:46 pm Post subject: Re: Gear Box Ratio |
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I remember reading in one of the KITFOX service letters that all they ever delivered was a 3:1. Hope this helps.
Jack
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Ken Potter
Joined: 18 Aug 2007
Posts: 85
Location: Lanark, Ontario
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| Posted: Wed Jul 08, 2009 3:34 am Post subject: Re: Gear Box Ratio |
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Thanks to everyone for their advice. I took Leonards advice and marked the Hardy Joint and turned the prop. It was 3:1 so I suspect that Jack was right, that this was the standard for Kitfox at the time.
Cheers
Ken
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kitfox-List |
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_________________
Ken Potter
Model II, No. 483
Rotax 582, C-Box,
99% Complete
C-FJKP
Lanark, Ontario |
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