Search found 1439 matches

by Carrdo
Wed Mar 15, 2023 8:39 am
Forum: Live Steam Marketplace
Topic: WTB a 3-4 in duplex boiler pump
Replies: 16
Views: 5173

Re: WTB a 3-4 in duplex boiler pump

If you use the search feature on Chaski and type in Wolfgang Habicher's 3/4" Scale Duplex Pumps, you will find the thread with photos of his duplex pump units.

His set of CAD drawings are truly beautiful. I have a set of them purchased many years ago.
by Carrdo
Mon Jan 02, 2023 11:13 pm
Forum: Build Log
Topic: Constructing the Josslin Hudson
Replies: 511
Views: 164014

Re: Constructing the Josslin Hudson

Proceeding with "the fix". Most of the work involved disassembly and then re- assembly of all of the parts. Nothing special here, just some careful work. Once I removed an axlebox, the axlebox was setup in the vise of the mill on parallels as shown in the first photo. Small step plugs were...
by Carrdo
Sat Dec 31, 2022 4:03 pm
Forum: Build Log
Topic: Constructing the Josslin Hudson
Replies: 511
Views: 164014

Re: Constructing the Josslin Hudson

Whats coming up next. Fix an issue which I need to deal with now before proceeding further. As I mentioned previously, as seen from the attached photos, the axlebox extended ear 2-56 NC hex head bolts need to be replaced with the same size flat head cap screws as with things as they now exist, these...
by Carrdo
Sat Dec 31, 2022 2:30 pm
Forum: Build Log
Topic: Constructing the Josslin Hudson
Replies: 511
Views: 164014

Re: Constructing the Josslin Hudson

Finishing the side rods by drilling all of the oil holes, eight in total having two different sizes using a #43 and an # 50 drill. The reason for the drill sizes is they are tap drill sizes and, if one wishes, one can tap these holes for a sealing plug or a miniature oil fitting in the future. The m...
by Carrdo
Wed Dec 28, 2022 7:12 pm
Forum: Build Log
Topic: Constructing the Josslin Hudson
Replies: 511
Views: 164014

Re: Constructing the Josslin Hudson

The side rods coupled to the main drive wheels. As expected, everything is very tight so some "quantitative easing" is in order. Josslin was an excellent draftsperson but not a locomotive builder so in some areas he left hardly enough room for any movement. There are a few binds where some...
by Carrdo
Tue Dec 27, 2022 9:39 pm
Forum: Build Log
Topic: Constructing the Josslin Hudson
Replies: 511
Views: 164014

Re: Constructing the Josslin Hudson

Proceeding to finish machine the front side rods. This involves finishing the front side rod's tongue extensions to finished thickness. The setup and description is much the same as described previously. From the centre line of the rod on the big end, it was determined how much metal was to be remov...
by Carrdo
Mon Dec 26, 2022 2:44 pm
Forum: Build Log
Topic: Constructing the Josslin Hudson
Replies: 511
Views: 164014

Re: Constructing the Josslin Hudson

The next operation was to grind down both ends of the front side rods to their final thickness. This seems to be a straight forward operation although it is anything but that. As with the rear side rods, the front side rods have 1/32" offset centrelines at each end. This is done so that the inn...
by Carrdo
Thu Dec 15, 2022 12:06 pm
Forum: Build Log
Topic: Constructing the Josslin Hudson
Replies: 511
Views: 164014

Re: Constructing the Josslin Hudson

The finished front side rod fluting. This was not without a few issues. The Josslin prints call for a 5/16" wide inner fluting leaving a 1/16" wide rib on the top and bottom. One has to remember that the diameter of the cutter on the inner fluting has to be the same size or a size smaller ...
by Carrdo
Tue Nov 29, 2022 4:08 pm
Forum: Build Log
Topic: Constructing the Josslin Hudson
Replies: 511
Views: 164014

Re: Constructing the Josslin Hudson

Finish profiling the bottom section of the front side rods. The setup looks to be a bit of a hash but it worked fine when used with light cuts and a sharp cutter. One has to support the rods as shown in several places in order to avoid bending or distorting them when the table clamps are fully tight...
by Carrdo
Sat Nov 26, 2022 10:40 am
Forum: Live Steam
Topic: Steam Locomotive model drawings
Replies: 70
Views: 60929

Re: Steam Locomotive model drawings

Richard and I have all of the known drawings (13 in total) for the Josslin NYC J-1(a,b) Hudsons in 3/4" scale. They originally came from the son or grandson of P.E. Hunt (Percy, Eldon), Howard Hunt who had the original tracings. There are no castings for this model which I have ever been able t...
by Carrdo
Sat Nov 26, 2022 10:12 am
Forum: Live Steam
Topic: Steam Locomotive model drawings
Replies: 70
Views: 60929

Re: Steam Locomotive model drawings

There are lots of 2.5" gauge (1/2" scale) North American type live steam locomotives (both plans and castings) available from the National 2.5" Gauge Association located in the UK. They have a published listing of everything which is available. This includes all of the Josslin/LBSC co...
by Carrdo
Fri Nov 25, 2022 5:12 pm
Forum: Build Log
Topic: Constructing the Josslin Hudson
Replies: 511
Views: 164014

Re: Constructing the Josslin Hudson

Slowly working my way around the rod profile. It is just more of the same with virtually each radii requiring a different setup. One also has to slowly cut away at the reference surface to provide clearance for the cutting tools. But do not eliminate it entirely at this point as the remaining refere...