uuu
Elder Statesman
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Post by uuu on Apr 30, 2020 6:29:24 GMT
Yes: Fran 7.25 by Kenneth Lindeman, on Flickr When you're looking at the photo on Flickr, there's a curved arrow symbol, bottom right. Click on that and a dialog box pops up. Choose "BBCode" from the list at the top, then use the drop-down to choose a picture size. I've gone for medium 640x330 here. Then copy the resulting code and just paste it in here. Just paste, no need to choose any proboard options. Wilf
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Post by KennLindeman on Apr 30, 2020 8:04:22 GMT
Hi Wilf
Thanks found it
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Post by KennLindeman on May 11, 2020 17:34:57 GMT
Finished drawing the Valve gear for both the 5 inch imperial and the 7 1/4 Metric, but the timing not working. Is there anybody out there that know any of the simulation programs to help me input the Simplex's info to see what is happening
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uuu
Elder Statesman
your message here...
Posts: 2,856
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Post by uuu on May 11, 2020 18:24:26 GMT
I've used the Dockstader program - download here (having followed the links from Don Ashton's web): Dockstader I think it's !0A you want. Not that I've necessarily had success exactly. I've fed in the dimensions and got the graphs showing the events - but then I don't know what I'm looking at, so don't know if the results are good or bad. I can play with dimensions and the graphs change, but is it better - how can I tell? Wilf
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Post by John Baguley on May 17, 2020 12:09:48 GMT
hello Ken,
I modelled the 5" Simplex valve gear some years ago using the Allan Wallace simulator (my goto simulator). here's a snapshot of the data input pages for that if they will help:
The results are actually very good in forward gear
For your 7 1/4 version you should be able to just substitute the dimensions. It doesn't matter if the dimensions are metric or imperial so long as they are all the same.
Hope that helps
John
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Post by KennLindeman on May 17, 2020 17:27:27 GMT
Hi John
Thanks for getting back to me I found your post with these details which i entered. It's working ok, Just one question What is the Bobbin spacing it talks about and how did you work out the port sizes and spacing
Ken
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Post by KennLindeman on May 17, 2020 17:34:06 GMT
Busy changing the reversing lever. I don't like the screw type and want to use a lever type but I am having problems not getting enough travel Assy with Valvegear D by Kenneth Lindeman, on Flickr
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Post by KennLindeman on May 17, 2020 17:39:22 GMT
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Post by John Baguley on May 20, 2020 9:37:28 GMT
Just one question What is the Bobbin spacing it talks about and how did you work out the port sizes and spacing Ken Hi Ken,
The 'Bobbin' spacing is the distance between the outside lands of the slide valve i.e. the length of the exhaust cavity, 0.75". For a piston valve it would be the distance between the valve heads.
The port sizes and spacing are as per the 5" drawings. You can make those how you like so long as the valve dimensions are adjusted to suit.
John
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Post by builder01 on May 23, 2020 15:56:11 GMT
Busy changing the reversing lever. I don't like the screw type and want to use a lever type but I am having problems not getting enough travel Assy with Valvegear D by Kenneth Lindeman, on Flickr The screw type reverser allows for about 1-7/16" movement of the valve gear reach rod, of which you only need about 1-1/4" to change from full forward to full reverse. I used a spacer on the reverser screw to limit the travel in each direction, you don't want the die block to bottom out in the expansion link. If built for 7-1/4" gauge, the full movement of the reach rod would be about 1.915", of which you would need about 1.666" to go from full forward to full reverse. If your quadrant does not allow for this much movement, perhaps the quadrant needs to be larger? These numbers are for the Super Simplex. The Simplex allows for even more movement of the reach rod at 1-11/16". I see you have the reverser stand on the inside of the frame, this will probably cause the reach rod to collide with the boiler. David
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Post by KennLindeman on May 31, 2020 4:48:29 GMT
Sunday 6:40 Cape Town, South Africa, Dark and cold Firebox Assy A by Kenneth Lindeman, on Flickr Been working on the 5" firebox while trying to better understand Valve gears. The idea is drawing the 5" copper, then do the 7 1/4 copper, then 7 1/4 steel and finish of doing a 7 1/4 Briggs boiler. Yes I do enjoy doing Cad drawings. And want to see how flexible the Simplex design can be used for as many options as possible with the same parts. And then add the 0-6-2 option
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Post by KennLindeman on Jun 1, 2020 11:13:22 GMT
Afternoon All
Anybody have good copies of ME 3346/47/48/49/50/51/52 The Super Simplex pages Please PM me
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Post by KennLindeman on Jun 1, 2020 13:20:15 GMT
And #3845 to 3852
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dscott
Elder Statesman
Posts: 2,440
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Post by dscott on Jun 2, 2020 0:48:32 GMT
Lovely Drawing Kenn. Yes I have used Technical Drawing all my life in a Degree and later all my employment. Funny that my Dad put me down for French lessons when it came up for choice of subject!!! Got to know 2 French Girls who insisted on English only when with them! Honestly the only possible time I could have used it Productively AND I DID NOT NEED IT.
However apart from the ash pan which I recommend more space for. Another change is to box in both axles so that ash does not get close. I am also doing a Jessie in 7 1/4" and am changing the position of the valve spindle on both. They currently go into the corners which puts quite a force on them. I have moved both to the centers. At the same time making the bosses and bearings much bigger for bearing surfaces. Currently there being tiny bits of bearings in there places. I have now just started putting up photos and have a JESSIES PROGRESS on here.
Best regards David and Lily.
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Post by KennLindeman on Jun 3, 2020 5:31:43 GMT
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Post by builder01 on Jun 3, 2020 9:37:39 GMT
Ken, check your regular email. I sent you everything you need.
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Post by KennLindeman on Jun 3, 2020 17:19:54 GMT
Thanks to John and Builder for the drawings, which are much better quality then mine.
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Post by KennLindeman on Jun 4, 2020 4:06:18 GMT
So while reading through the pages send from the kind folks on this forum I discovered that I have missed a lot of detail for the Super Simplex vs the Simplex Going to fix there errors before going any further with sorting out the valve gears. Another piece of info I was looking for was the reason for the 3/16 hole in front of the weight shaft hole. See insert from Martin Evans book on the Simplex. John Hale had suggested it may have had something to do with the weight shaft alignment. Simplex hole by Kenneth Lindeman, on Flickr
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Post by KennLindeman on Jun 4, 2020 4:12:18 GMT
And John if this 3/16 hole is used to line up the link brackets, the dimension you gave me from Don will then mean that the Motion bracket needs to move to line up with this hole
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Post by KennLindeman on Jun 4, 2020 15:25:53 GMT
Question fir the people who have build a Super Simplex. What does the engine's weight and is the engine to heavy or to light. I am trying to see when I draw parts do I nee to make them heavier or lighter?
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