GregP
Major
There have been several people in here who have expressed some doubt about conversion among American, British, German, and Russian engine boost. I thought I'd address that.
The U.S.A. used inches of Mercury (in. Hg). The British used pounds (per square inch) of boost. The Germans used technical atmospheres. The Japanese used millimeters of Mercury. I have no idea why they used different units and don't care. The problem is converting among them.
Since I am from the U.S.A., I'll reference inches of Mercury, but the equations are easily manipulated to reference other units.
1) The U.S.A. uses inches of Mercury (in Hg).
2) British psi of boost (lbs Boost) = [(14.696/29.92) * in Hg] – 14.696
3) German Technical Atmospheres (ata) = (in Hg) / 28.958
4) Japanese mm Mercury (mm Hg) = (in Hg – 29.92) * (760 / 29.92)
If anyone is interested, I have an Excel spreadsheet that computes all the others from any of them that I can forward or post ... but I can't seem to post an Excel file ... the "manage attachments" button doesn't seem to work for me. Neither does the "Attachments" button.
The U.S.A. used inches of Mercury (in. Hg). The British used pounds (per square inch) of boost. The Germans used technical atmospheres. The Japanese used millimeters of Mercury. I have no idea why they used different units and don't care. The problem is converting among them.
Since I am from the U.S.A., I'll reference inches of Mercury, but the equations are easily manipulated to reference other units.
1) The U.S.A. uses inches of Mercury (in Hg).
2) British psi of boost (lbs Boost) = [(14.696/29.92) * in Hg] – 14.696
3) German Technical Atmospheres (ata) = (in Hg) / 28.958
4) Japanese mm Mercury (mm Hg) = (in Hg – 29.92) * (760 / 29.92)
If anyone is interested, I have an Excel spreadsheet that computes all the others from any of them that I can forward or post ... but I can't seem to post an Excel file ... the "manage attachments" button doesn't seem to work for me. Neither does the "Attachments" button.
