Oldtankers efficiency figures are about double what I read-30% for gas and 40% for diesel under ideal conditions, real life more like 25% gas, 30/35% diesel. I got 48mpg on 1981 diesel rabbit, younger brother had similar vintage Ford escort with diesel and got 40 to 50 estimate- he wasn"t checking milage to gallons fillup for 2000 miles like I did. European small diesel not sold in US for various reasons and EPA rules on testing and fuel availability is a large concern. diesel Smart car gets about 80mpg in European highway tests-- but class of vehicle means that it must pass EPA tests standards that require computer controll/diagnostics on computer control shifting--which is hard to do with manual transmission-- and knock sensor/spark ignition retarding-- which is strangly enough not used on diesel, go figure. The testing procedure for over 10,000 pound trucks lets a man (or woman) in vehicle do shifting and the diesel class section measures tailpipe output directly without checking a computer for spark advance-- the demonstration Smart car diesel can pass this test easily with the new ultra low sulfur fuel that has been European standard for 5 to 10 years longer than available in US -2007/2009--- But the Smart car is not a "commercial/utility vehicle" and is under 10,000 pounds. The testing rules were in early 2011 being looked at for possible changes in allowed procedures. Particulate rules, testing procedures, general aggravating government rules mean some makers of diesel optioned car won"t suffer the aggravation for American market when they have a gas engine option available for the market-- which with $3.00/gallon gas isn"t as fuel efficient friendly as a 5.00/gallon- 1.5 Euro/liter market. RN
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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