NeilStirling
Airman
- 27
- Oct 6, 2006
Napier Sabre combat ratings, probably 1945.
- Thread starter NeilStirling
- Start date
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Simon Thomas
Senior Airman
Thanks for posting that.
Interesting that the performance lines are straight, even with the abscissa being linear with altitude.
Typically engine performance charts are drawn with the abscissa being linear with the altitude air density/sea level air density ratio. This means the altitude labels are on a non-linear scale. This is done as it makes the performance "curves" generally linear. This was based on the paper "Altitude Performance of Aircraft Engines Equipped with Gear-Driven Superchargers" R. F. Gagg, E. V. Farrar https://www.jstor.org/stable/44437712
I'll leave it to others to discuss the boost ratings...
Interesting that the performance lines are straight, even with the abscissa being linear with altitude.
Typically engine performance charts are drawn with the abscissa being linear with the altitude air density/sea level air density ratio. This means the altitude labels are on a non-linear scale. This is done as it makes the performance "curves" generally linear. This was based on the paper "Altitude Performance of Aircraft Engines Equipped with Gear-Driven Superchargers" R. F. Gagg, E. V. Farrar https://www.jstor.org/stable/44437712
I'll leave it to others to discuss the boost ratings...
Simon Thomas
Senior Airman
In the IMechE Napier Sabre archive, item NAP/6/2/7 makes this statement:
"Report concerning single-seat fighter aircraft Sabre E122 aftercooled engine. Includes comments on layout, drawings and test data."
Someone is adament that the E122 was never made. One of the Napier Heritage Trust books mentions that fabrication of the E122 was started, but never completed due to the takeover.
"Test data" implies testing. Possibly single cylinder? Has anyone seen this file?
archivecat.imeche.org
"Report concerning single-seat fighter aircraft Sabre E122 aftercooled engine. Includes comments on layout, drawings and test data."
Someone is adament that the E122 was never made. One of the Napier Heritage Trust books mentions that fabrication of the E122 was started, but never completed due to the takeover.
"Test data" implies testing. Possibly single cylinder? Has anyone seen this file?
'A study of engine cooling...'
'...and installation problems involved' Report CDT/PROJ/32, Project Design Office marked confidential. Report concerning single-seat fighter aircraft Sabre E122 aftercooled engine. Includes commen…
