Author Topic: Stuart Major Beam Engine  (Read 40401 times)

Online Jo

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Re: Stuart Major Beam Engine
« Reply #255 on: April 03, 2020, 09:22:19 AM »
I would be tempted to make most of the arm out of a piece of plate then silver solder the fork on the end.

Jo

P.S. I still think the Major Beam is a desirable engine/set of castings  :-X
Enjoyment is more important than achievement.

Online Jasonb

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Re: Stuart Major Beam Engine
« Reply #256 on: April 03, 2020, 10:19:40 AM »
I don't think it would be any harder to do from 3/8" flat bar than two bits, the only real difference is that you have a bit more waste material unless the basic shape is bent from 1/4 x 3/8 stock

Offline Chipswitheverything

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Re: Stuart Major Beam Engine
« Reply #257 on: April 03, 2020, 01:26:50 PM »
Good going on the governor bits!   I think that I made the bell crank by milling , such as could be done, around the two sides of a 3/8" thick BMS block and then sawing away and trimming the inside shape. I didn't bend the curve, just filed it .    Probably didn't cut it away from the parent block entirely until the last stages. There isn't much waste to worry about as the whole thing is quite small.   Dave

Offline Chipmaster

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Re: Stuart Major Beam Engine
« Reply #258 on: April 04, 2020, 06:35:55 PM »
Thanks for the input Jo, Jason and Dave. I've been reducing the thickness of a piece of 2" x 5/8" thick steel strip in my milling machine this afternoon ready for marking out tomorrow to follow Dave's method. If I can't get that right I'll try the other methods.

Andy

Offline Chipmaster

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Re: Stuart Major Beam Engine
« Reply #259 on: April 06, 2020, 07:53:35 PM »
Some pictures of the bell crank taking shape.
Started by reducing the end of a piece of 2" x 5/8" steel bar to 1/2" thickness then scribed the outline of the bell crank. Set up at the 102 degree crank angle in the milling vice and milled the top of the forked arm. The holes in the steel were from some previous task.

S Major 1013 by Andy, on Flickr

1/8" hole drilled for the pivot then used a slot drill to mill the fork,

 S Major 1014 by Andy, on Flickr

S Major 1016 by Andy, on Flickr

Respositioned to mill the embryonic arm down to 3/32" thickness,

S Major 1017 by Andy, on Flickr

S Major 1019 by Andy, on Flickr

S Major 1020 by Andy, on Flickr

At this stage I need to mark out the crank again and do as much shaping as possible before removing it from the parent bar.....tomorrow.

Andy

Andy

Offline Chipswitheverything

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Re: Stuart Major Beam Engine
« Reply #260 on: April 07, 2020, 12:51:54 PM »
Pleased to see your photos of this interesting but awkward little item : apart from other model engineers and machinists, who would ever guess what a lot of work and chewing away this small finished component actually entailed?    I suppose that the actual thing would have been forged, and probably been left with a more workaday appearance than the miniature version?   Dave

Offline Chipmaster

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Re: Stuart Major Beam Engine
« Reply #261 on: April 07, 2020, 10:24:26 PM »
Hi Dave, bell crank done bar a little more filing and polishing,

Using a Kennedy Number 60 power hacksaw to separate the bell crank from the 2" wide parent bar which is the limit for this machine.

S Major 1021 by Andy, on Flickr

Fifteen minutes later.... - click on the picture to start the video of the saw in action,

 S Major 1022 by Andy, on Flickr

Which gave me this from which to extricate the bell crank,

S Major 1024 by Andy, on Flickr

S Major 1023 by Andy, on Flickr

It took me about three hours of filing and grinding to get to this stage,

S Major 1028 by Andy, on Flickr

 S Major 1027 by Andy, on Flickr

S Major 1026 by Andy, on Flickr

I haven't made any of the proper pivots yet (used 10BA screws as a temporary measure) and there are a couple of minor details outstanding. However, the governor does work.

Andy

Offline Johnmcc69

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Re: Stuart Major Beam Engine
« Reply #262 on: April 08, 2020, 02:13:09 AM »
 :ThumbsUp:
 Real nice Andy! Turned out very well!

 John

Online Jo

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Re: Stuart Major Beam Engine
« Reply #263 on: April 08, 2020, 08:10:12 AM »
That looks rather nice  :)

I haven't made any of the proper pivots yet (used 10BA screws as a temporary measure)

At least they are not something small and fiddly  :lolb:

Jo
Enjoyment is more important than achievement.

Offline john mills

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Re: Stuart Major Beam Engine
« Reply #264 on: April 08, 2020, 10:32:41 AM »
like the way you made that leaver looks good   
    John

Offline Chipmaster

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Re: Stuart Major Beam Engine
« Reply #265 on: April 08, 2020, 10:48:39 AM »
Good morning and thanks for looking in, it was a relief to finish that part. I must credit my mentor Chipswitheverything for the method used, thanks Dave.
Jo, yes fiddly little bits today.
Andy

Offline Chipswitheverything

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Re: Stuart Major Beam Engine
« Reply #266 on: April 08, 2020, 02:06:02 PM »
Excellent progress and result Andy, the governor looks great and you have an intriguing new toy to add to the engine and to feel very pleased with!   Dave

Offline fumopuc

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Re: Stuart Major Beam Engine
« Reply #267 on: April 10, 2020, 04:32:08 PM »
Hi Andy, this governor looks really great.
A masterpiece.
« Last Edit: April 10, 2020, 07:46:44 PM by fumopuc »
Kind Regards
Achim

Offline Chipmaster

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Re: Stuart Major Beam Engine
« Reply #268 on: April 10, 2020, 09:40:50 PM »
Kind of you to say that Achim.
I'm following your superb Bruce Macbeth Engine build.

Andy

Offline J.L.

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Re: Stuart Major Beam Engine
« Reply #269 on: April 11, 2020, 10:00:20 PM »
Hi Andy,
I have not been following this thread.  My loss.

Masterful machining and presentation!  :ThumbsUp:

You must be very prould of machining and assembling these wonderful little parts of the engine in themselves.

Works of art!

Cheers...John