DCC CV's - Best Practices for N&W Steam
NW Modeling List
nw-modeling-list at nwhs.org
Wed Jan 15 08:31:32 EST 2025
That's quite an interesting consist behind that K3, Matt. Thanks
for sharing this.
Mike Rector
On Wed, Jan 15, 2025, 6:31 AM NW Modeling List via NW-Modeling-List <
nw-modeling-list at nwhs.org> wrote:
> Dave, the modeling list is working. Jim Cochran has been posting here on a
> pretty regular basis.
>
> Regarding the K3, while they might have been disliked after they actually
> hit the road, the railroad was very proud of these home builds back in
> 1927. Attached is an image from the December 1927 N&W magazine. Counting
> this photo, the locomotive was highlighted in no less than five issues that
> year. A fun bit of trivia; the K3’s were the first N&W locomotives - and
> one of the first in the US to be cross-counterbalanced. They did this to
> mitigate the challenges caused by that long main rod (which was selected to
> keep the rod angularity to a minimum in order to reduce load (and
> associated heat) on the crosshead guide.
>
> Closer to on-topic, as far as K2/K1 speeds, I’d guess they’d start huffing
> and shaking over 80. These were both older designs, but ooking at photos,
> they were both fitted with lighter weight machinery (and I believe cast
> frames) and larger stacks at some point, both of which I imagine allowed
> them to run a little faster. The larger stack suggests they were re-drafted
> at some point, and lighter machinery would reduce
>
> Closer yet to on-topic, the advice Mr Baker provided regarding decoder
> settings, while not satisfying, is spot on. I have standardized on TCS
> decoders for the sound (and the first ones to implement load based exhaust
> keyed to BEMF). I also prefer linear response, and given I model steam, I
> don’t have an intention to speed match my locomotives. However, the same
> class with the same gearbox and decoder should be close out of the box.
>
> Be careful, given the questions you asked, I may be coming back to you for
> advice if I run into an issue!
>
> Matt Goodman
> Columbus, Ohio, US
>
> [image: 2B0D3107-D001-4C32-BAD3-4A07DBB5B3F5_1_201_a.jpeg]
>
> On Jan 14, 2025, at 2:08 PM, NW Modeling List <nw-modeling-list at nwhs.org>
> wrote:
>
> Dave,
> You are very much mistaken about the speed limits of the K class locos!
> The classes K1 and K2/K2a were "high rollers"!
> Only the class K3 had balance problems and were speed limited!
>
> Jimmy Lisle
>
>
>
> Sent from my Verizon, Samsung Galaxy smartphone
>
>
> -------- Original message --------
> From: NW Modeling List <nw-modeling-list at nwhs.org>
> Date: 1/14/25 1:33 PM (GMT-05:00)
> To: NW Modeling List <nw-modeling-list at nwhs.org>
> Subject: Fwd: DCC CV's - Best Practices for N&W Steam
>
>
> Steam Modelers;
> It’s been a long time since I’ve seen any messages from the NW-*Modeling*-List
> leaving me to wonder if it has fallen into disuse. So, I’ll post here on
> the NW-*Mailing*-List.
>
> I am initiating the task of programming the CV’s of a small number of N&W
> Steamers in classes A, J, K, S1, Y3, & Y6b and many questions are coming to
> mind. So, why not tap into the best data source for guidance? As you share
> information, please indicate the Locomotive Class.
>
> Beginning with some foundational matters:
>
> My goal is to keep things *reasonably* realistic. For example; The Y
> classes were not speed-demons, and the K classes had operational speed
> limits due to counterbalance issues.
>
> When dealing with acceleration and deceleration rates – I’m rather torn
> about actually putting hard values in CV’s because I would say they should
> be dependent on external conditions such as train power and weight, in
> addition to terrain.
>
> Have you pursued speed limitations? Initial research suggested these top
> speeds for Road Power:
> Class A – 70 mph
> Class J – 110 mph
> Class K – 35 mph
> Class Y – 50 mph
>
> What are you using for:
> CV 02 – Start Voltage
> CV 03 – Acceleration Rate
> CV 04 - Deceleration Rate
> CV 05 – High Voltage (Speed Limiting)
> CV 06 – Mid Voltage
> CV 65 – Kick Start
>
> Speed Curves:
> Which are you using?
> 3-point curve? (Start, Mid, High of a preloaded
> curve)
> CV 25 - Speed Table Selection?
> Which one?
> 14 step or 28 step configured?
> What do you have for CV 67 to CV
> 94?
> Are you using a Throttle Control Mode? If so,
> which one?
>
> Speed Matching & Consisting:
> If it is Speed Matched, to what locomotive?
> What values do you use for:
> CV 66 – Forward Trim
> CV 95 – Reverse Trim
> What values do you use for consisting with other Locomotives:
> CV 21 – Consist Functions Fn1 to Fn8
> CV 22 – Consist Functions Fn0 & Fn9 to Fn12
> CV 23 – Consist Acceleration Rate
> CV 24 - Consist Deceleration Rate
>
> Thank you,
> Dave Willis
> Blt 1962, CN 4
>
> ________________________________________
> NW-Mailing-List at nwhs.org
> To change your subscription go to
> http://list.nwhs.org/mailman/options/nw-mailing-list
> Browse the NW-Mailing-List archives at
> http://list.nwhs.org/pipermail/nw-mailing-list/
>
>
> ________________________________________
> NW-Modeling-List at nwhs.org
> To change your subscription go to
> http://list.nwhs.org/mailman/options/nw-modeling-list
> Browse the NW-Modeling-List archives at
> http://list.nwhs.org/pipermail/nw-modeling-list/
>
>
> ________________________________________
> NW-Modeling-List at nwhs.org
> To change your subscription go to
> http://list.nwhs.org/mailman/options/nw-modeling-list
> Browse the NW-Modeling-List archives at
> http://list.nwhs.org/pipermail/nw-modeling-list/
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://pairlist6.pair.net/pipermail/nw-modeling-list/attachments/20250115/c0240701/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 2B0D3107-D001-4C32-BAD3-4A07DBB5B3F5_1_201_a.jpeg
Type: image/jpeg
Size: 1527291 bytes
Desc: not available
URL: <https://pairlist6.pair.net/pipermail/nw-modeling-list/attachments/20250115/c0240701/attachment-0001.jpeg>
More information about the NW-Modeling-List
mailing list