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Thread: Stephenson's Rocket
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11th January 2018, 07:55 PM #151GOLD MEMBER
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11th January 2018, 09:01 PM #152
Now before you think if one cylinder is at end of stroke (dead centre) the other cylinder will be half way, I think you will find it is close but not quite due to the angularity of the connecting rod.
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11th January 2018, 11:09 PM #153GOLD MEMBER
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13th January 2018, 11:57 AM #154
Why me?
I hit the wrong place and added a more picture please but on second thought I do want pictures of you checking it out. LOL
Just kidding there keith
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13th January 2018, 04:27 PM #155
Not sure if I can come up with an image for you. It is just something I remember from my engine driving classes.
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13th January 2018, 04:34 PM #156
HandyJack don't worry about it, some of these buttons are dangerous in the wrong hands.
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13th January 2018, 05:01 PM #157
CFADCC45-B950-40D2-9D87-3E72FB609B61.jpg2DE68C1E-52F3-451B-8DF0-009FF6F120E4.jpg
These 2 pictures were taken on the same visit and, even though they are only of the ‘sectioned replica’, there are probably (hopefully?) mechanical reasons why it should be assembled accurately. I haven’t got my protractor out (where IS Trevor when you need him*) but it appears very close to 90 degrees by eye?
fletty
* When Trevor and I were researching pictures of subtle differences between Lawrence of Arabia’s various Brough Superiors, he had “noticed” that in the pictures of George VII, Lawrence’s seventh Brough, the rear wheel appeared to be 19” whereas the front is 21”. When I sheepishly contacted the Brough Owners Group in England to confirm this outrageous observation, they CHECKED THE FACTORY WORKS CARD (!) and confirmed that the rear wheel is indeed 19” and the front is 21”. This hitherto unnoticed (and undisclosed?) quirk apparently resulted from the Great Man himself being vertically challenged?
RIP Treva rock is an obsolete tool ......... until you don’t have a hammer!
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13th January 2018, 07:53 PM #158GOLD MEMBER
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Trev will be chuckling Alan
I will do some work on paper and try to get a photo of it for you Bruce
Thanks for the photos Alan
Regards
Keith
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14th January 2018, 03:44 PM #159GOLD MEMBER
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You were spot on Kevin.
See attached sketch - The top section of stroke to reach the 90 degree is 56% of the piston stroke - whilst to reach full length is 44% of the stroke length.
55.jpg
Thanks
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14th January 2018, 08:02 PM #160
I was hoping it would be in English.
I put it in the Google translator and it said sorry buddy but we can't help you.
Just kidding there Keith, there's a science to everything especially trains!
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15th January 2018, 01:51 PM #161GOLD MEMBER
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Hi All,
Completed the end valves on the cylinders and the front 90 degree on/off valves near the cylinder glands.
This locomotive had square head bolts on the end covers of the cylinders. I used Tassie Oak for these - cut down to make a square head by using my table saw.
I have cut my piston shafts to the correct length as per my previous post.
The assembly can still be dismantled (for finish painting - down the track so to speak)
Primed the 2 drive cylinder assemblies with Automotive spray primer.
I reckon I will prime everything and then dismantle for hand painting - like I did with the Stirling Single.
Now to make the Internal Brackets to attach the cylinders to the boiler assembly.
Once the bracket locations and fittings are finalised - I can then start working out my method of timber cladding the boiler.
Regards
Keith
56.jpg
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17th January 2018, 05:16 PM #162
Looking good Keith! I’m looking forward to seeing the end product
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17th January 2018, 11:11 PM #163GOLD MEMBER
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18th January 2018, 09:39 AM #164
I thought you might find these truck builds interesting both metal and wood.
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18th January 2018, 11:51 AM #165GOLD MEMBER
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