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.
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
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?
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
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.
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.
Builder of far too many projects, but I love them all. The more Locomotives you have building, the more solutions to other Projects Problems get Solved. Reworking Simplex into a Fowler Complex. Making a Jinty more to scale. And going up a size in the shape of a Jessie.
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.
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?