Post by onequiknova on Nov 29, 2012 14:23:06 GMT -8
Here's what the hatch looks like. for the model, I plan to duplicate the flat plate on top with shim brass or .005 styrene and use Archer rivet decals to represent the bolt heads. (the Cannon fans are not glued on yet.)
Re: the Sharpie. I started using it when I was scratchbuilding steam engines with brass. Guys use a blue dye to coat metal before marking/scribing it, being frugal, I used a Sharpie instead of buying the dye. The scribe lines show up much better in person than than do in the photo's.
My first thought after finding out about the fan issue was to use Highliner fans instead. Problem is, I already spent the money on the Cannon fans, and finding Highliner parts is problematic these days. I have a couple ideas to make the Cannon fans work.
Post by railthunder on Dec 5, 2012 16:40:52 GMT -8
Take a look at the Cal Scale 190-400 Horn. It's a three chime, but the rear facing chime appears to be elevated above the foward facing two that it could be clipped off and the existing horns facing forward would appear to more closely match the prototype than the out of stock/production Overland part.
Post by onequiknova on Dec 23, 2012 20:51:13 GMT -8
Sorry for the slow moving thread. I've got my first born due in about 6 weeks, so I've been busy getting ready for that. Still a bunch to do before he's here, but I had a couple spare hours today to spend at the work bench.
I decided to model 9908 since there are numerous pictures of it online, and it's preserved within driving distance at IRM. 9906,9907 and 9908 are kind of oddballs compared to the rest of the fleet. They received the taller twin fan box, which I modeled earlier in this thread, and their HEP hatch differs from the rest as well. The rear HEP hatch (ex steam gen hatch) on the rest of the fleet stayed the same size as original, while 9906-08 received a larger hatch.
Here's how I went about modeling it.
First off I needed to remove the small hatch from the roof. I did this with progressively finer sanding sticks. Starting with 220 and finishing with 600 grit.
There is a slight shadow left, but I assure you it's dead flat.
After determining the size of the new hatch from pictures, I cut it out of .005 styrene and traced it's outline on the roof. I then drilled 1/16" holes around the inside perimeter. These holes will aid in gluing the hatch to the roof. Note I filled in the large holes left over from the steam gen details.
The hatch is then held in place with enough rubber bands to hold it completely flat, then thin CA is added from inside the shell through the previously drilled holes. You don't want to use plastic cement on .005 styrene. It will melt it.
.005 styrene is still a bit too thick for this application, so after the glue dried I sanded the hatch with a 400 grit sanding stick to remove a couple thousands. Archer decals will be used to add the bolt head detail.
Post by onequiknova on Dec 24, 2012 18:06:25 GMT -8
Next up I want to tackle the vented box that sits over the HEP fan. This is another area that is unique to 9906-08. On the rest of the fleet the fan and cover sit on a rather large,raised flat panel like in the link below.
The sides and rear are vented, while the front is solid. Note the box isn't contoured to fit the curve of the roof, instead they extended the outer legs to reach down to the roof.
I build the box from styrene. The top is .020, the slates are made from .010x.060 strips,and the vertical braces are cut from .005. The corner legs are made from .040 brass L stock.
As you can see, the brass L "legs" are positioned so there is a flat area on each side to glue the horizontal slats to. As far as I can tell, this matches the prototype fairly close. I also trimmed some of the L away so the end could be folded over to create a "foot" or mounting bracket.
After looking at it completed, I'd say I made it a bit too tall, but I'm willing to live with it at this point. The rest of the mounting brackets still need to be built.
Post by onequiknova on Apr 15, 2013 13:02:25 GMT -8
Time to get back to this project. First let me state, I hate the new Photobucket.
The winterization hatches on the BLI unit bother me. They're too narrow, and the grills, which are molded in place, are oddly shaped.
Here's a comparison of the BLI and original run Proto. BLI on the left, Proto on the right. The etched grills are by Plano, which are designed for the Proto hatch.
I decided to use the Proto hatches on this build since they look closer to the correct size. In order to use the Proto hatches on the BLI, I need to first build up the bottom of the hatches to get the proper height. I added .030 styrene to make up the difference.
Here it is just sitting on the model.
Note, even though the BLI fans are too small, the larger C&C fans still fit on the fan hatch. I still need to find out what to do with the fan beneath the winterization hatch. Are they countersunk like the original Proto E8's, or on the same level as the rest of the fans?
Post by onequiknova on Apr 15, 2013 19:57:48 GMT -8
Not that I'm aware of. I scored a basket case Proto off EBay a while back to scavenge parts from. If I didn't have it I would have made a larger opening in the BLI hatch and used the Plano grilles on them. This would require scratch building new frame work around the grill.