| Gallery, Projects and General > Project Logs |
| Yet another paddleducks engine build |
| << < (8/10) > >> |
| boatmadman:
Managed to finish the steam chests, then went on to make the steam spindle couplings, the steam chest blanks and the eccentric webs. |
| boatmadman:
Update! I set out to make the steam valve spools and had problems. The first one came out ok, but no2 somehow came out off centre >>:-(, as did no 3, no4, no5 and no 6. >>:-( So, I left them for a while and tried again, this time with success, all 4 are ok, I think! So, next job was to drill and tap the base of the steam chests to take the spool gland, first chest drilled ok, then first tap (m2) snapped in the hole grrrrr >>:-( >>:-( there is no way that is coming out, or so I thought. Then I found out that taps can be dissolved without harm to brass using a solution of aluminium potassium sulphate (alum), now awaiting delivery of the magic powder, I will update on results later. I then thought I would do a simple job, so made the flanges for connection to the steam chests. Having succeeded with those, I thought I would tackle the steam control valves next, that went well, although time consuming getting them right. Ian |
| boatmadman:
Today I thought I would have a go at some steam pipe and silver solder. Not having done much ss before, I decided to do some practise items first. The first pic shows a flange blank ss’d to a short length of copper pipe and cut in half. As I wanted to be sure to get full penetration (ooeeerrr), I cut the item in half to have a look. Success, it appears to have gone all the way through! I then cut 2 more blanks and had a go at soldering from the pipe end, pic 2 shows the result, not so good, think again. I then turned a flange with a spigot for the pipe to sit in with the idea of putting a ring of ss in the bottom of the spigot, apply heat and let it do its job, but, the pcd of the bolt holes is too small to let me do this with the design requirement of 4mm pipe, so, think again! I then soldered blank flanges onto a length of pipe from the open end of the flange, filed back to near flat and finished on a flat plate – success, pics 3 and 4 show the results, with some added bling! Next I needed to work out a way of getting 4 bits of pipe the same. Pic 5 shows a flange positioned 20mm or so from the end of the pipe., with flux and ready to solder. Pic 6 sees that pipe in the tube bender, using the flange to locate for length, and pic 7 shows the pipe after bending. Pics 7 and 8 show the finished and polished pipes. These will need to be cut to length to fit into the control block at a later stage. Overall, I am happy with the results, they aren’t as good as some I have seen, but they’ll do! Ian |
| boatmadman:
and the rest |
| boatmadman:
here we have engine no. 1 mostly assembled and timed. Just needs the blank plates fitting to the steam chests, the cylinder covers bolting on and the steam control block fitting. It turns with two fingers on the flywheel, its just a little tight, but I hope it will improve with running in. Now I have to wait for more copper pipe for the inlet/outlet connections. Then I will have to beg steal or borrow a compressor! Ian |
| Navigation |
| Message Index |
| Next page |
| Previous page |