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Post by railfansd40t2 on Aug 17, 2014 21:13:39 GMT -5
Hello Guys. I need a bit of instruction on if what I want to do would be prototypical or not. I just purchased a RPP SD90MAC with frame and I will get the trucks taken car of down the road but here is my series of questions. The model I am getting has what looks to me to be a cab which resembles the SD60M in some ways and I like this cab but I like the H-II cab much better but I think I will be doing this locomotive wrong if possibly a couple other changers are not made. From what I can tell the SD70ACE cab would be the right one to use for a Phase two unit correct? But the other concern is the 3 fans at the end of the long hood as well as the configuration of the sand box. It looks to me that the sand box was revised when the unit got the Phase II cab is this correct? Also I have seen some 1:1 photos of these units having the 3 fans and some having only two. Yes I do know that the farthest one on the rear is the Dynamic Brake fan it is not counted when I say two or three. What I am wondering is are the SD9043MACs the ones with the 2 fans because of the 4300 HP Prime mover? So what I am getting at is this. If I use an SD70ACe cab leaving the 3 fans and the sandbox in its original configuration will this locomotive be a mistake and die a horrible death because none of the other MACS will except it on the grounds?  All kidding aside would this be totally incorrect to add the Phase II cab and leave the rest of the unit as is or are there ones out there set up this way that I have just not found pictures of on line? And lastly is the SD70ACE cab available in the market place and if so does anyone know who makes it? Let me know you all think Paulie |
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Post by CP_8530 on Aug 18, 2014 15:01:06 GMT -5
The 4300hp SD9043MAC = 3 fans, the 6000hp SD90MAC-H = 2 fans. Not sure on the other points as I haven't studied making one much.
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Post by railfansd40t2 on Aug 18, 2014 17:35:10 GMT -5
Thank You Mr. Dan,
That is a start.
Paulie
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osrr
Trainmaster
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Post by osrr on Aug 18, 2014 23:59:03 GMT -5
6000hp SD90MAC-H = 2 fans. Isn't that one the failed 4 cycle engine version? |
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c415rock
Moderator
"Linking the East with the West"
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Post by c415rock on Aug 19, 2014 1:46:45 GMT -5
HI Paulie,
Yes you can use the SD70ACE cab for the H2 version. As this was the cab they used the design for the ACE. I have looked thru all my books and photos. I have not been able to find any H2 with the 3 fans. With that said, it is model railroading and if you want to use the ACE cab with the 3 fans why not. Most if not all the H2 got cut up. So who is to say in your world that a standard SD90 did not get in a wreck and the cab was trashed. The back story could be UP went to EMD and the cab was not longer made. So EMD sold UP a new ACE cab to replace the wrecked cab. Stuff like this happened all the time. Just look at the MP U23B's and U30C that were rebuilt with EMD cabs after they were wrecked.
Just some food for thought.
Have fun with your build.
Erik
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Post by lyled1117 on Aug 19, 2014 9:13:12 GMT -5
How about an SD89? (or a variant?) EMD did a demonstrator of this locomotive, but no orders were generated. Looks to be an SD70 cab to me but I have not given it a close look. Edit yours a bit and call it an SD88? (rivet counters please hold your fire  ) I took these photos in Galesburg, IL back in 2004   |
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Post by railfansd40t2 on Aug 19, 2014 21:32:10 GMT -5
Thank you guys for all the great feedback and the photos. I had thought about it as a rebuild so now the hunt for an SD70ACe cab begins which I am afraid may take some time. I have the part numbers for all four versions of it from the Genesis book that comes with the unit that I plugged into Athearn's web page in the parts department but nothing comes.up. I have been told it sometimes is better to call them so my brother has left an Voice mail with them for me and I have sent an Email inquiring about them so we shall see if they get back to either of us. I am now hoping maybe to find a good clean resin one out on the web but so far no luck.
Anyway I will continue my search and we will see which way this bad boy will go.
Thanks again guys for your help and support.
Paulie
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Post by MitchGDRMCo on Aug 19, 2014 22:11:37 GMT -5
Aye carumba the info.... 3 fans doesn't equal 4300hp SD9043, there were H engined SD90s with the early body.  SD90MAC - 6000hp The first SD90s (SD90MAC and SD9043MAC) shared the same body, difference being the engine compartment and the distinguishing feature is the angled section of the roof of the engine compartment. Compare to:  SD9043MAC - 4300hp Now the model in question being the SD90MAC-H2 is much different, it shares really only the length (physically) with the earlier SD90s but has a different frame (no step just behind the cab, see the kink in the frame in the above images) the 2 fan radiator setup, the dynamic brake section that has since been copied on the SD70ACe, the cab that became the ACe cab and the electrical cabinet and walkway is different also. See:  I wouldn't really know what to start with for a model as I haven't looked in to making one (HO or N) but Overland did a HO version if you want something correct despite the expense.... The ACe cab would be the right one to start with yes. Refer to photos on what details to kitbash. I'm a bit lost, 3 fans and one is the dynamic brake? The early units with 3 fans by your counting would have 4 fans (3 radiator fans and the larger dynamic brake fan at the rear) and the later units with 2 fans would have 3....so don't even consider the dynamic brake fan here, just those above the flared radiator section. Yes the sandbox was changed to the ACe style (well the ACe copied it...) when they created the Phase 2 90MAC. The prime mover didn't change how many fans there were. More than just fans you have to consider, the whole frame would need to be modified to be all the same height, the section behind the cab and the boxes on the walkways would need to be changed, the sanbox needs to be changed, etc.....yes, if you just change the cab it'll be some halfway house Ph1.5? or something.... There is only what I have shown above to exist. |
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Post by big train james on Aug 19, 2014 22:26:40 GMT -5
Paulie,
You may want to pick up some back issues of the UPHS Streamliner magazine. There was a one or two part article by Don Zimmerman titled "Union Pacific 6000 HP Locomotives Pt 1" that included text and a zillion pictures of all the detail variances between different phases of the sd90's on the UP. I'm a bit confused by the UPHS back issue web page as I can't find "Pt 2" listed anywhere. But I could swear I looked at both issues on the stand at Caboose Hobbies back at the time.
The volume that has part 1 in it is Volume: 16 Issue: 2. Maybe contact the UPHS to find out about the followup article. Or worst case, call Don at Caboose Hobbies (he works in the brass department there) and ask him about the articles and their various parts.
I hope this helps in some way.
Jim
Edit: I just did a different search and found another Streamliner index that indicates part 2 is in Volume: 16 Issue: 3 so maybe those two issues would be worth pursuing. It looks like back issues are available from the UPHS for about $10 each.
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Post by railfansd40t2 on Aug 21, 2014 19:18:04 GMT -5
Hello Jim,
Thank you for all that great information as well as the photos those will be saved in my collection for sure. By looking at them I see now that the 6000 HP units have the angled center section in front of the fans and the 4300 HP have the flat section which means the RPP unit I just got in the mail today is truly an SD9043. Am I seeing that correctly in those photos and understanding what you wrote correctly?
I was fortunate enough to find the Detail Associates side frames that fit on the Athearn SD40-2 trucks on Ebay last night after Walther's sent me back an Email telling me that they have been discontinued. This also makes sense since the part number is not listed on many sites that I have been searching around. on.
The guy on Ebay had 4 sets of these so I bought two just to be on the safe side. I don't know at this time if I will use the second set real soon but now knowing they may not show up again I wanted to grab them.
I also found luckily the brass etched A-Line step set for this unit so those will now look better. I guess I need to look for radiator grills for it too and maybe fans but I am not sure who makes them. Maybe I need to go back to A-line's website and look around a bit more.
I will go and check into those articles you were talking about and maybe that will answer some more of my questions.
Again thanks to all that have responded so far on this because I sure appreciate all the feedback and help.
Paulie
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Post by MitchGDRMCo on Aug 21, 2014 23:14:56 GMT -5
Yes, squared off roof for the SD9043, angled roof for the 6000hp SD90.
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sgoti
Chairman
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Post by sgoti on Aug 21, 2014 23:32:16 GMT -5
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Post by railfansd40t2 on Aug 22, 2014 10:11:04 GMT -5
Yes, squared off roof for the SD9043, angled roof for the 6000hp SD90. Thank you. I like to be sure I understand things. Paulie |
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Post by railfansd40t2 on Aug 22, 2014 10:11:54 GMT -5
Hmmmmm, Interesting for sure. Thanks Glenn. Paulie |
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Post by emd16645 on Aug 23, 2014 5:04:36 GMT -5
Paulie,
Don't forget to check out the Cannon website. They have some parts for the SD90.
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Post by railfansd40t2 on Aug 23, 2014 18:50:54 GMT -5
Thank you Chris I will do that.
I got my Detail Associates side frames today that work with the Athearn BB SD40-2 trucks and they are real nice. I had a bit of a time adding all the detail parts because they are so tiny but man what nice stuff, there was zero flash on any of the parts and they fit the trucks perfectly.
Going to look around for some fans I think I would like to have some better ones if they are not real pricey but if they are I will just give the stock ones a little flat black down inside to give them a bit more depth.
I have a question about the site.
Is there a way to search for older stuff that any of the members have done just by using key words ? I would like to see if there are any other MAc builds that were done at any time since the site has been up and running.
Any assistance would be greatly appreciated.
Paulie
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sgoti
Chairman
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Post by sgoti on Aug 23, 2014 19:37:12 GMT -5
Is there a way to search for older stuff that any of the members have done just by using key words ? I would like to see if there are any other MAc builds that were done at any time since the site has been up and running. Yep... Below the banner photo, you will see a menu bar... Third item in is search... You will see sections for what, where, when, and who, as well as a choice for how to search... |
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Post by railfansd40t2 on Aug 23, 2014 21:35:44 GMT -5
Ya Know ? It is not like this is my first day on a computer you would have thought I would have had enough sense to click on the search and find what I was looking for. Sometime I just aint the brightest bulb in the box  Thanks for going easy on me with that one because that was a stupid question. Paulie |
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sgoti
Chairman
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Post by sgoti on Aug 23, 2014 22:25:52 GMT -5
Meh- Sometime we just need to be pointed in the right direction. I certainly have had my share of these...  |
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Post by emd16645 on Aug 24, 2014 6:15:51 GMT -5
Honestly, I have found the search features of this site to be significantly lacking. I have found that the most effective method is using google. Perform a google search for "dieseldetailer" + [whatever you're searching for].
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