specific fuel consumption conversion
Joined: Dec 2007
Posts: 46
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From: Lincolnshire, UK
Not in the businness but as an automotive design engineer I find the following a good site Online Conversion - Convert just about anything to anything else

Joined: Dec 2006
Aviation Qualifications: CPL
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From: Hamburg
Since horsepower is an ambiguous unit, i.e. there are multiple definitions of what one horsepower is, an exact conversion would require some additional information on what type of horsepower is meant here.
Incidentally, my favourite reference for anything that involves unit conversions is this:
U.S. Department of Commerce - National Institute of Standards and Technology, Guide for the Use of the International System of Units (SI), edition 2008
Incidentally, my favourite reference for anything that involves unit conversions is this:
U.S. Department of Commerce - National Institute of Standards and Technology, Guide for the Use of the International System of Units (SI), edition 2008
Thread Starter
Joined: Feb 2013
Posts: 5
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From: UK
the horsepower is the shaft horsepower as quoted by rolls royce for a turboprop engine
http://www.rolls-royce.com/Images/mo...cm92-14681.pdf
http://www.rolls-royce.com/Images/mo...cm92-14681.pdf

Joined: Jan 2008
Posts: 17,718
Likes: 2,083
From: Reading, UK
pounds per hour per horsepower x kilograms/pound ÷ watts/horsepower = kilograms per hour per watt
kg/lb = 0.454
W/hp = 746
so lb/hr/hp ÷ 1643 = kg/hr/W
divide the answer by 3600 for kg/s/W, but you probably don't want to do that.
kg/lb = 0.454
W/hp = 746
so lb/hr/hp ÷ 1643 = kg/hr/W
divide the answer by 3600 for kg/s/W, but you probably don't want to do that.
Joined: Oct 2008
Posts: 97
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From: Under the Long Grey Cloud
From documentation I have: (Relating to a particular turbo diesel piston engine and nothing to do with aircraft)
Specific Fuel Consumption
0.372 lb/hph or 229 g/kWh (at 2500 rpm)
By extrapolation,
0.635 lb/hph = 391 g/kWh
Hope that helps
Specific Fuel Consumption
0.372 lb/hph or 229 g/kWh (at 2500 rpm)
By extrapolation,
0.635 lb/hph = 391 g/kWh
Hope that helps




