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Offline Dreadnought  
#1 Posted : 10 January 2025 19:50:57(UTC)
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Dreadnought

Canada   
Joined: 24/12/2008(UTC)
Posts: 422
Location: Niagara, Ontario
I have just received the Marklin Magazine 05 (Canadian postal strike, and being away to blame)

I read and enjoyed the article on the 141 R. At P.14 the article mentions that the oil fired, second batch of locomotives were fitted with Kylchap drafting system. It also said twin smoke stacks were the distinguishing feature. I notice the 141 R is oil fired. it does not have a twin smokestack. I notice the Flying Scotsman has twin smoke stacks, my Belgian 1 Class pacific too, the Challenger and the Big Boy also.

Is this a mistake on Marklin's part, (unlikely) or can the Kylchap exhaust be fitted in a single exhaust?
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Offline JohnjeanB  
#2 Posted : 10 January 2025 23:33:47(UTC)
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JohnjeanB

France   
Joined: 04/02/2011(UTC)
Posts: 3,550
Location: Paris, France
Hi Dreadnought

No specialist here
the Kylchap was designed by Kyösti Kylälä and André Chapelon (Hence the Kylchap name) and first implemented in 1926 in Vierzon (France)
Because in 1943 / 1944 France was at war and occupied by Germany, the Free French government decided to purchase a north american locomotive design: powerfull, easy to maintain but a glutton in coal, water and oil so I have serious doubts that the US and Canadian loco manufacturers used the Kylchap to optimize the combustion.
Just my opinion
Cheers
Jean
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Offline EMD_GP7  
#3 Posted : 11 January 2025 22:11:12(UTC)
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EMD_GP7


Joined: 23/11/2010(UTC)
Posts: 193
Location: U.K. Midlands
The classic book that I have a copy of by Chapelon, "Locomotive A Vapeur " shows examples of single, double and even triple ( 242A1 loco) Kylchap blast pipes.
I have two 141R locos by Jouef and Rivarossi but both are coal burners with single Chimney As stated above the second batch were fitted with Kylchap exhausts but I don't know if they had single or double chimneys.
Colin
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Offline bph  
#4 Posted : 13 January 2025 15:55:58(UTC)
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bph

Norway   
Joined: 04/08/2018(UTC)
Posts: 1,144
Originally Posted by: Dreadnought Go to Quoted Post
I have just received the Marklin Magazine 05 (Canadian postal strike, and being away to blame)

I read and enjoyed the article on the 141 R. At P.14 the article mentions that the oil fired, second batch of locomotives were fitted with Kylchap drafting system. It also said twin smoke stacks were the distinguishing feature. I notice the 141 R is oil fired. it does not have a twin smokestack. I notice the Flying Scotsman has twin smoke stacks, my Belgian 1 Class pacific too, the Challenger and the Big Boy also.

Is this a mistake on Marklin's part, (unlikely) or can the Kylchap exhaust be fitted in a single exhaust?

It seems that the author of the article made a mistake with the reference to twin smoke stacks. perhaps mixing it up with the Flying Scotsman?
As you mentioned the second batch of 141R was fitted with Kylchap exhausts.
The Kylchap can be used in a single stack, and the second batch of 141R also had a single smoke stack. Don't know if all or how many locomotives in the second batch were fitted with Kylchap. A drawing of the Kylchap used in the 141R can be found here: https://commons.wikimedia.org/wiki/Category:Diagrams_about_SNCF_Class_141_R

Comparison between a 141R with Kylchap and a 141R with standard exhaust.
141R_kylchap.jpeg
Source: csrail.org https://csrail.org/newsroom/2016/1/19/history-of-the-141-r-a-precursor-to-csrs-new-white-paper
Also recommend the CSR White Paper Development of Modern Steam 1: Andre Chapelon and his Steam Locomotives

Fun fact: The last 141R was taken out of service in 1974, and the first TGV was built in 1978.

Kylchap can make a big difference, e.g. as with the BR Standard Class 8 Duke of Gloucester. Despite recommendations, it was fitted with a standard double exhaust, to save cost. But during restoration, it was finally fitted with a double Kylchap exhaust, and the firebox issues were also corrected.
https://www.youtube.com/watch?v=GSebplOe3qc&t=540s
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Offline Dreadnought  
#5 Posted : 13 January 2025 16:22:11(UTC)
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Dreadnought

Canada   
Joined: 24/12/2008(UTC)
Posts: 422
Location: Niagara, Ontario
Thank you for the replies. I had no idea the Klychap could be fitted to a single exhaust. It is reassuring to know Marklin has not made a mistake. The article might have been clearer, but it has given me a nice chance to test the expertise of the forum. Thank you all
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