>TB wrote:
>[Regarding 2301]
>> I saw it heading to Normanby at approx 14:00 Friday February 20, and it was
>> 2301 -- the first loco converted for the "Maxi Overhaul Project" at
>> Redbank. 2301 was formerly 1564 and it now has a 2100-class cab, and yes
>> it is 'turbocharged'.
>With an actual turbocharger? I'm not refering to the Roots blower for
>scaveging, since that counts more or less as natural aspiration. What
>exactly was the Maxi Overhaul Project?
>Thanks for the info ...
>--
>Robert Kearey 3365 8527
>Network Services Prentice Centre
>University of Queensland r.kearey@prentice.uq.edu.au
What do you mean an actual turbocharger? A turbo runs by the exhaust passing
through a small turbine which is conected to a larger turbine which pumps
air into to the intake side of the engine thus increasing the amount of air in
the cylinders. A supercharger (or roots blower which is a type of
supercharger) has the same effect as a turbo but is mechanically driven by
belts as on cars or on larger diesles gear driven like GMs. Most larger
diesels are either turbo or supercharged due to the amount of air reqired in
the cylinders to enable combustion to occur, more air = more efficient (up to
a point).
David Malcolm