enginehistory.org

The early liquid cooled engines used water at atmospheric pressure as a coolant. Later engines with pressurized coolant systems and ethylene glycol based coolants were ale to run at considerably highe ...

FWIW I've seen claims that certain German engines, specifically the BMW 132H and Bramo 323R, could use 100 or 96 octane fuel for extra power on takeoff. This capability was supposedly used on large ai ...

It seems that there is a big step involved in going from 14 to 18 cylinders due to problems involving:
- mechanical resonances
- mixture distribution
- cooling.

Perhaps the initial success of th ...

There is some interesting information at http://www.historywebsite.co.uk/Museum/Transport/planes/SunbeamEngines7.htm

While describing the engine as "one of the worst engines produced during th ...

I noticed the scanned catalog of Sunbeam aero engines that was recently posted on the AEHS web site. What caught my attention was that the Arab V8 was prominently featured at a time (January 1920) whe ...

Todd

Thanks. I have the question of what the definition of "piston dishing" is. One sees the use of the word "dish" in the context of pistons having concave tops. In this case i ...

The BMW IIIa was a special case due to the optimization of the engine for high altitude performance. The main idea was to use an exceptionally high (for the time) compression ratio and throttle the e ...

These are accessible at http://www.flightglobal.com/PDFArchive/

Robert

The motivation for the increases in cylinder size would seem to be to squeeze out more power. The primary application, at least to start out with, was the Ju 288, and this in turn went though increase ...

I noted with interest the recent article on the Jumo 222. I recall a report that the Soviets continued the development under a team of interned German personnel. However, AFAIK, there does not appear ...

During the late 1930s, the permissible operating temperatures of liguid cooled engines were increased by two measures: the use of ethylene glycol based coolants, and the pressurization of the cooling ...

Not sure if this helps, but there is a paper by Lovesy, "Development of the Rolls-Royce Merlin from 1939 to 1945," that gives the following for the performance of the two stage supercharger ...

Another interesting report is available at:

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930094473_1993094473.pdf

This is a translation of an Italian paper on their engines developed f ...

I've noticed some papers of potential interest have been recently added to the NASA web site at http://ntrs.nasa.gov/search.jsp . Many of these are translations of German or other European reports.
...

szielinski

Good questions. i was hoping someone could shed some light on this subject.

I think it was Heron who claimed that direct fuel injection had the drawback of not proving as much cooli ...