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steamyjim
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 Posted: Wed Aug 05, 2009 1:24 pm Post subject: Bowman M140 Engine |
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I have recently been given a set of plans for the Hobbies Arrow and am going to order the wood after I finish my next boat; a Midwest Fantail.
I would like to use a Bowman inspired engine for it but rather than buying one I would like to have a go at replicating the engine and boiler from a M140.
I was wondering if anyone could give me the measurments for the engine frame on the M140 and the size of the round crank, I am assuming I can get the other measurments from my M158 as that uses the same basic unit.
Can I also have the measurments for the boiler please? I intend to make a silver soldered (as it will be gas fired) replica to fit into the boat 
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8_10 Brass Cleaner
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Joined: 12 Oct 2007
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Location: Shropshire
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| Posted: Wed Aug 05, 2009 1:52 pm Post subject: Re: Bowman M140 Engine |
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| steamyjim wrote: | I have recently been given a set of plans for the Hobbies Arrow and am going to order the wood after I finish my next boat; a Midwest Fantail.
I would like to use a Bowman inspired engine for it but rather than buying one I would like to have a go at replicating the engine and boiler from a M140.
I was wondering if anyone could give me the measurments for the engine frame on the M140 and the size of the round crank, I am assuming I can get the other measurments from my M158 as that uses the same basic unit.
Can I also have the measurments for the boiler please? I intend to make a silver soldered (as it will be gas fired) replica to fit into the boat |
I made a small twin out of two Mamod Minor1 cylinders, it was about the size of a M140 unit except the bores were a little smaller. If you used two SP1 cylinders you would get a closer match. These should be fairly easy to find. |
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steamyjim
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| Posted: Wed Aug 05, 2009 1:56 pm Post subject: Re: Bowman M140 Engine |
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| 8_10 Brass Cleaner wrote: | | steamyjim wrote: | I have recently been given a set of plans for the Hobbies Arrow and am going to order the wood after I finish my next boat; a Midwest Fantail.
I would like to use a Bowman inspired engine for it but rather than buying one I would like to have a go at replicating the engine and boiler from a M140.
I was wondering if anyone could give me the measurments for the engine frame on the M140 and the size of the round crank, I am assuming I can get the other measurments from my M158 as that uses the same basic unit.
Can I also have the measurments for the boiler please? I intend to make a silver soldered (as it will be gas fired) replica to fit into the boat |
I made a small twin out of two Mamod Minor1 cylinders, it was about the size of a M140 unit except the bores were a little smaller. If you used two SP1 cylinders you would get a closer match. These should be fairly easy to find. |
Thats a good idea, I shall think about that. I have one SP1 or MM1 cylinder spare I think.
I'd like to have a go at replicating the engine accuratley however as I think it would be a nice challenge for my skills.
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Happy 30th Birthday Mamod Railway Company!
My Steam Toy Site
www.freewebs.com/toysteam
My Garden Railway (The Whitchurch Light Raily Company) Site
www.freewebs.com/wlrail |
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Spokesmann
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| Posted: Wed Aug 05, 2009 2:45 pm Post subject: |
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Jim I have an M140 Ill get some dims shortly.
M
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steamyjim
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| Posted: Wed Aug 05, 2009 3:22 pm Post subject: |
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| Spokesmann wrote: | Jim I have an M140 Ill get some dims shortly.
M |
Thankyou
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Happy 30th Birthday Mamod Railway Company!
My Steam Toy Site
www.freewebs.com/toysteam
My Garden Railway (The Whitchurch Light Raily Company) Site
www.freewebs.com/wlrail |
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Spokesmann
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| Posted: Wed Aug 05, 2009 4:17 pm Post subject: |
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Jim a few dimentions + or - 1mm
Boiler diameter: 50mm
Length: 115mm (not inc OFP)
Height on FB: 100mm, not inc dome.
Engine overall width across both cylinders: 80mm
Engine height: 61mm, not included counter shaft gear
Round crank: 25mm diameter. 8mm thick
Engine length overall from cylinder end to edge of f/wheel: 65mm, 60 with no f/wheel.
Hope that helps, I know someone who has made a boat with an M140 engine similar to the Bowman Seahawk, driving the prop through a contrate gear to turn the drive through 90 degrees.
Let me know if you need some more dims or pics.
M
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steamyjim
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| Posted: Wed Aug 05, 2009 4:30 pm Post subject: |
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| Spokesmann wrote: | Jim a few dimentions + or - 1mm
Boiler diameter: 50mm
Length: 115mm (not inc OFP)
Height on FB: 100mm, not inc dome.
Engine overall width across both cylinders: 80mm
Engine height: 61mm, not included counter shaft gear
Round crank: 25mm diameter. 8mm thick
Engine length overall from cylinder end to edge of f/wheel: 65mm, 60 with no f/wheel.
Hope that helps, I know someone who has made a boat with an M140 engine similar to the Bowman Seahawk, driving the prop through a contrate gear to turn the drive through 90 degrees.
Let me know if you need some more dims or pics.
M |
Thanks very much Mike!
Would you be able to get a picture looking at the engine from the top, looking at the engine from the side with the engine in front of the firebox and one looking at the chimney end with the flyewheel and burner at the rear? I can put the measurments on the photos then and visualise what I need easier than a list
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Happy 30th Birthday Mamod Railway Company!
My Steam Toy Site
www.freewebs.com/toysteam
My Garden Railway (The Whitchurch Light Raily Company) Site
www.freewebs.com/wlrail |
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Spokesmann
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Joined: 07 Jun 2007
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| Posted: Wed Aug 05, 2009 4:33 pm Post subject: |
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I have it next to me, hang on!
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