Subject:
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Re: Dimensions of a SD40 and GP35
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Newsgroups:
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lugnet.trains
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Date:
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Wed, 1 Dec 1999 23:06:01 GMT
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Reply-To:
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lpieniazek@novera.com{spamless}
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Viewed:
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862 times
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The GP35 is rather a boring engine in appearance. If you could pull off
a GP30, that would be spectacular! Due to some "hacks" at design time,
they have rather elaborate and ungainly fairing on the top of the hood
which is a result of the "electrical cabinet, turbo charger, central air
intake and filter all competing for space" (quoting my source).
Note that the GP35 56'2" length is coupler tip to coupler tip. GP35s had
9 ft wheelbase trucks. (2 axle Blombergs unless they were riding on
trade in Alco Type Bs) From truck kingpin to truck kingpin is only
32'0".
An SD45 is 65'8" coupler tip to coupler tip or 40'0" kingpin to kingpin.
It has 3 axle trucks with evenly spaced axles, which are 6' 9 1/2" axle
spacing or 13' 7" wheelbase.
Note that the SD 38 and 39, having smaller prime mover engines, but
built on the same frame as the SD45, as John notes, will have shorter
hoods, and therefore larger platforms at front and rear (nicknamed
"porches" by boomers). The SDP40 used the extra hood space for a steam
generator, so didn't have the porches.
The SD45-T2 has an even longer frame at 45'5" kingpin to kingpin or
70'2" coupler tip to coupler tip. This is to allow for the extra space
alloted to air intakes. These -Ts were built for tunnel service and have
main air intakes mounted low on the hood to provide cooler, cleaner air
to the prime mover and traction blowers.
How are you going to model the SD trucks? My ersatz Alco used
articulated trucks, which looks sort of OK but the wheelbase is way too
long.
(all dimensions from the MR Cyclopedia, Vol 2, Diesel Locomotives. (C)
1980 Kalmbach Publishing Co., ISBN 0-89024-547-9)
John Neal wrote:
>
> Well, Chris-
>
> A GP35 was 56' 2"; an SD45 was 65' 8" (EMD used the longer underframe of
> SD45 as a standard, which was then used for the SD38, SD39, and SD40).
>
> The main difference, however, is that the GPs were a B-B (4-4) wheel
> configuration, while the SD's were a C-C (6-6) wheel config. *That* would
> be noticeable at LEGO resolution;-)
>
> -John
>
> Christopher Masi wrote:
>
> > My train book list the length of one of these engines but not the other
> > (cannot remember which one at the moment). I have pictures of both, but
> > the big question remains; are they the same lenght or is one longer than
> > the other? If one is longer than the other is it something that would be
> > noticeable at LEGO resolution? For example, 60 vs 40 ft would be
> > noticeable, but 45 vs 40 ft wouldn't be that big a deal.
> >
> > Thanks,
> > Chris
--
Larry Pieniazek larryp@novera.com http://my.voyager.net/lar
- - - Web Application Integration! http://www.novera.com
fund Lugnet(tm): http://www.ebates.com/ ref: lar, 1/2 $$ to lugnet.
NOTE: Soon to be lpieniazek@tsisoft.com :-)
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Message has 2 Replies:
 | | Re: Dimensions of a SD40 and GP35
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| My thinking was this: I did not want to give up on the SD 40-2 because of the six wheel per truck issue, but I knew I would need a four wheel per truck to provide power for my train if I made the SD 40-2 a dummy engine which I did to make the six (...) (25 years ago, 2-Dec-99, to lugnet.trains)
| | | Re: Dimensions of a SD40 and GP35
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| Oops I foot noted without foot noting! [1] "The Great Book of Trains", Brian Hollingsworth and Arthur Cook, Salamander Books Ltd, London 1998, ISBN 0 86101 919 9. (...) (25 years ago, 2-Dec-99, to lugnet.trains)
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Message is in Reply To:
| | Re: Dimensions of a SD40 and GP35
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| Well, Chris- A GP35 was 56' 2"; an SD45 was 65' 8" (EMD used the longer underframe of SD45 as a standard, which was then used for the SD38, SD39, and SD40). The main difference, however, is that the GPs were a B-B (4-4) wheel configuration, while (...) (25 years ago, 1-Dec-99, to lugnet.trains)
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