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Kampon boilers

Posted: Wed Jan 23, 2013 10:30 pm
by chugwater shale
Hello all,

I know he IJN followed British Naval practice and philosophy in many areas, is this also the case in their naval machinery--perhaps at least as a starting point for developing their own ideas?

I find many mentions of Japanese warhsips being equipped with Kampon Boilers, but I haven't really found any clear description of the boilers themselves--were they similiar to Admiralty three drum boilers by any chance?

As usual, thanks in advance!

Re: Kampon boilers

Posted: Mon Jan 28, 2013 10:31 pm
by Mostlyharmless
There is a very critical description of Japanese WW2 boilers at http://www.fischer-tropsch.org/primary_ ... -01-12.pdf. I am sure that the boilers were inferior to those of the USN. However, the inferiority is perhaps less dramatic than one might believe after reading the report. Thus Yamato made 153,553 SHP on trials burning 62.7 metric tons per hour while Washington at 27 knots burned 43.3 tons per hour. Unfortunately I don't know the SHP for that run but it was probably near 115,000. Thus USN machinery gave more power per ton of oil but not hugely more.

Re: Kampon boilers

Posted: Tue Jan 29, 2013 11:55 am
by Thorsten Wahl
Washington at 27 knots burned 43.3 tons per hour. Unfortunately I don't know the SHP for that run but it was probably near 115,000
from where did you get this figure
FTP 218 figures for BB 55 class

based on max oil (95%)= 7554 tons at Mean displacement 40,700 tons
radius at 27 knots = 3640 miles
endurance at 27 knots therfor 134,8 h
fuel consumption(pure propulsion) = 56tons(long tons)/h

Re: Kampon boilers

Posted: Tue Jan 29, 2013 7:10 pm
by Mostlyharmless
I took the data about USS Washington from a web page at http://usswashington.com/fuel.htm which references it to "BATTLESHIP AT WAR" by Ivan Musicant which I have not read. The Yamato data is in the report on IJN boilers and also repeated in “IJN Yamato” by W. David Dickson (so I believe it).

Re: Kampon boilers

Posted: Tue Jan 29, 2013 7:36 pm
by Mostlyharmless
Thank you for the FTP 218 reference. It gives a range of rates of fuel consumption at 27 knots of 11,988-15,200 gallons per hour. I took the figure of 272 gallons per ton for crude oil from Wikipedia and that conversion gives that the best consumption was 44.07 tons/hr., which is close to the website. Thus, as usual, we find that an American site gives the best performance ever achieved by USS Washington. However, it is fair as the Yamato trials data was probably the best that Yamato managed.