Kerosene, Jet Fuel, Lockheed Constellation, Boeing 707, Boeing 747-400, Newton’s Third Law of Motion, Turbojet and Fan Jet

Posted by PITHOCRATES - October 3rd, 2012

Technology 101

The only way to make Flying Available to the General Public is to put as many People as Possible on an Airplane

Refined petroleum products have made our lives better.  We have gasoline to drive wherever we want.  We have diesel fuel to transport things on ships and trains like petroleum oil, iron ore, coal, food, medicine, smartphones, coffee, tea, wine, scotch whisky, bourbon whiskey, beer, fresh fish, sushi, etc.  Pretty much everything we buy at a store or a restaurant got there on something powered by diesel fuel.  And sometimes kerosene.  If it must travel fast.  And if it does then it finds itself on a jet aircraft.

Today aviation has shrunk the world.  We can order a new smartphone sitting on a shelf in California and have it the next day in New York.  We can even travel to distant countries.  Some in the time of a typical working day.  Some a half a day or longer.  When but a 100 years earlier it took a couple of weeks to cross the Atlantic Ocean.  While 200 years ago it took a couple of months.  We can travel anywhere.  And get there quickly.  Thanks to the jumbo jet.  And not just the super-rich.  Pretty much anyone today can afford to buy a plane ticket to travel anywhere in the world.  And one thing makes this possible.  The jet engine.

Airplanes are expensive.  So are airports, air traffic control and jet fuel.  Airlines pay for all of these costs one passenger at a time.  Their largest cost is their fuel cost.  The longer the flight the greater the cost.  So the only way to make flying available to the general public is to put as many people as possible on an airplane.  Dividing the total flying cost by the number of passengers on the airplane.  This is why we fly on jumbo jets for these longer flights.  Because there are more people to split the total costs.  Lowering the cost per ticket.  Before the jet engine, though, it was a different story.

The Boeing 747-400 can take up to 660 Passengers some 7,260 Miles at a Speed of 567 MPH

One of the last intercontinental propeller-driven airplanes was the Lockheed Constellation.  A plane with four (4) Wright R-3350-DA3 Turbo Compound 18-cylinder supercharged radial engines putting out 3,250 horsepower each.  Which is a lot considering today’s typical 6-cyclinder automobile engine is lucky to get 300 horsepower.  No, the horsepower of one of these engines is about what one modern diesel-electric locomotive produces.  So these are big engines.  With a total power equal to about four locomotives lashed up.  Which is a lot of power.  And what does that power allow the Constellation do?  Not much by today’s standards.

In its day the Lockheed Constellation was a technological wonder.  It could take up to 109 passengers some 5,500 miles at a speed of 340 mph.  No bus or train could match this.  Not to mention it could fly over the water.  Then came the age of the jet.  The Boeing 707 being the first largely successful commercial jetliner.  Which could take up to 189 passengers some 6,160 miles at a speed of 607 mph.  That’s 73.4% more passengers, a 78.5% faster speed and a 14.1% longer range.  Which is an incredible improvement over the Constellation.  But nothing compared to the Boeing 747-400.  Which can take up to 660 passengers (506% more than the Constellation and 249% more than the 707) some 7,260 miles at a speed of 567 mph.

Now remember, fuel is the greatest cost of aviation.  So let’s assume that a intercontinental flight costs a total of $75,000 for each plane flying the same route.  Dividing that cost by the number of passengers you get a ticket price of approximately $688, $397 and $114 for the Constellation, the 707 and the 747-400, respectively.  So you can see the advantage of packing in as many passengers as possible into an airplane to lower the cost of flying.  Which is why the jumbo jets fly the longest routes that consume the most fuel.  And why we no longer fly propeller-driven aircraft except on short routes to airports with short runways.  These engines just don’t have the power to get a plane off the ground with enough people to reduce the cost of flying to a price most people could afford.  Only the jet engine has that kind of power.

The Fan Jet is basically a Turbojet with a Large Fan in front of the Compressor

Newton’s Third Law of Motion states that for every action there is an equal and opposite reaction.  Think of a balloon you just blew up and are holding closed.  If you release your hold air will exit the balloon in one direction.  And the balloon will move in the opposite direction.  This is how a jet engine moves an aircraft.  Hot exhaust gases exit the engine in one direction.  Pushing the jet engine in the opposite direction.  And because the jet engines move the plane moves.  With the force of the jet engines transferred via their connection points to the aircraft.  The greater the speed of the gas exiting the jet the faster it will push a plane forward.

The jet engine gets that power from the continuous cycle of the jet engine.  Air enters one end, gets compressed, enters a combustion chamber, mixes with fuel (kerosene), ignites, expands rapidly and exits the other end.  The hot (3,632 degree Fahrenheit) and expanding gases pass through and spin a turbine.  Then exit the engine.  The turbine is connected to the compressor at the front of the engine.  So the exhaust gases spin the compressor that sucks air into the engine.  As the air passes through the compressor it compresses and heats up.  Then it enters the combustion chamber and joins fuel that is injected and burned continuously.  Sort of like pouring gas on a burning fire.  Only enormous amounts of compressed air and kerosene are poured onto a burning fire.  As this air-fuel mixture burns it rapidly expands.  And exits the combustion chamber faster than the air entered it.  And shoots a hot stream of jet gas out the tail pipe.  Which produces the loud noise of these turbojets.  This fast jet of air cuts through the surrounding air.  Resulting in a shear effect.  Which the next generation of jet engines, the fan jet, greatly reduces.

The fan jet is basically a turbojet with one additional feature.  A large fan in front of the compressor.  These are the big engines you see on the jumbo jets.  They add another turbine inside the jet that spins the fan at the front of the engine.  Which feeds some air into the compressor of what is basically a turbojet.  But a lot of the air this fan sucks in bypasses the turbojet core.  And blows directly out the back of the fan at high speed.  In fact, this bypass air provides about 75% of the total thrust of the fan jet.  Acting more like a propeller than a jet.  And as an added benefit this bypass air surrounds the faster exhaust of the jet thereby lessening the shear effect.  Making these larger engines pretty quiet.  In fact a DC-9, an MD-80, a 707 or a 727 with standard turbojets are much louder than a 747 with 4 fan jets at full power.  They’re quieter.  And they can push a lot more people through the air at incredible speeds over great distances at a reasonable price per passenger than any other aircraft engine.


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The High Cost of Labor Contracts and Environmental Regulations cause Planes to Run Low on Fuel

Posted by PITHOCRATES - August 26th, 2012

Week in Review

Here is a lesson in basic economics.  There is a tradeoff between costs and safety in aviation.  You could hire thousands of additional mechanics to give an airplane a complete overhaul after each flight.  And double their pay rate just to make sure they are especially happy workers.  You can have a couple of chase planes follow a passenger airliner on every flight to observe the outside of the aircraft so they can warn the pilot of any problems.  And you can top off every fuel tank on an airplane just to be extra safe.  These things would make flying safer.  But they would also make it very expensive to fly.  So expensive that few people would fly.  Thus reducing the amount of airplanes in the sky.  As well as the number of flight and maintenance crews.  Which illustrates the ultimate cost of generous union contracts.  The more they ask for the more they put themselves out of a job.

But these unions are powerful.  Margins are so thing in aviation that a strike could turn a profitable year into a money losing year.  So to avoid a strike they cut costs where they can.  And the one cost that gives them something to work with is their fuel costs.  Because an airplane only needs enough fuel to fly from point A to point B.  Plus some reserves.  So they are very careful in calculating the fuel requirements to get from point A to point B.  But sometimes weather can enter the picture and add a point C.  And this can sometimes cause a fuel emergency (see Pilots forced to make emergency landings because of fuel shortages by David Millward posted 8/20/2012 on The Telegraph).

Pilots have had to make 28 emergency landings because they were running low on fuel according to figures compiled by the Civil Aviation Authority…

Although the total represents of fuel-related emergency landings is a reduction on 2008-10, when there were 41 such incidents, some pilots have warned the airlines are operating on very narrow margins as they seek to cut operating costs…

One retired pilot told the Exaro website that he and his colleagues were under pressure from airlines because of the industry’s need to keep costs down.

“There is pressure on pilots by airlines to carry minimum fuel because it costs money to carry the extra weight, and that is quite significant over a year…

“The way in which aircraft are being developed in becoming more fuel efficient, there is less need for fuel.

We make jet fuel by refining petroleum oil.  And two things make this an expensive endeavor.  Higher environmental regulations.  And reductions in supply.  Often due to those same environmental regulations.  If they allowed the American oil business to drill, baby, drill, it would be safer to fly.  Because fuel would be less expensive.  And airlines could more easily afford to carry the extra fuel weight.

Airlines don’t have much power over controlling the price of jet fuel.  It is what the market says it is.  They have a little more luck in keeping their capital costs down thanks to the bitter rivalry between Boeing and Airbus.  Who are both eager to sell their airplanes.  Cutting their labor costs is another option they have but it comes with great political costs.  Usually it takes the specter of bankruptcy to get concessions from labor.  So when it comes to cutting their operating costs the least objectionable route to go is to cut fuel costs.  By loading the absolute bare minimum required by regulations.  And for safety.  Airlines want to save money.  But having planes fall out of the sky to save fuel costs will cost more in the long run.  In more ways than one.  (It’s hard to get people to fly on an airline that has a reputation of having their planes fall out of the sky.)

So there are only two practical options to fix this problem of skimping on the fuel load.  Either you drill, baby, drill.  Or you get labor concessions to lower you labor, pension and health care costs.  The very same things that are bankrupting American cities.  So you know the costly union workers are all in favor of drill, baby, drill.  Because the lower the cost of jet fuel the less pressure there is on their pay and benefits.


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FT110: “You can’t blame our dependence on foreign oil for high gas prices AND say that producing more domestic oil won’t lower gas prices.” -Old Pithy

Posted by PITHOCRATES - March 23rd, 2012

Fundamental Truth

The Combination of Low Demand and High Supply caused Oil Prices to Fall over 70% by 1986

The Organization of the Petroleum Exporting Countries (OPEC) is a cartel.  Made up currently of Algeria, Angola, Ecuador, Iran, Iraq, Kuwait, Libya, Nigeria, Qatar, Saudi Arabia, the United Arab Emirates and Venezuela.  Their purpose is to set oil quotas for their oil-producing members.  To limit the amount of oil they bring to market.  To reduce supply.  And increase oil prices.  At least that’s the idea.  It’s been hard to keep the individual OPEC members from cheating, though.  And a lot do.  Often selling more than their quota.  Because when oil prices are high selling a few percentages above their quota can be very profitable.  Unless everyone else does so as well.  Which they usually do.  For their choice is either not to cheat and not share in any of those ‘excess’ profits (beyond their agreed to quota).  Or cheat, too.  Thereby increasing supply.  And lowering oil prices.  Not something any oil producer wants to do.  But it’s the only way to share in any of those ‘excess’ profits.

But that’s not the only problem OPEC has.  There are a lot of oil producers who aren’t members of OPEC.  Who can bring oil to market in any quantity they choose.  Especially when they see the high price OPEC is charging.  OPEC’s high price allows non-OPEC suppliers to sell a lot of oil at a slightly lower price and reap huge profits.  Which puts pressure on the OPEC target price.  Forcing them to lower their target price.  For if they don’t lower their price they will lose oil sales to those non-OPEC producers.  Which is exactly what happened in the late Seventies.  While OPEC was cutting back on production (to raise prices) the non-OPEC nations were increasing production.  And taking over market share with their lower prices.  Causing OPEC to reverse policy and increase production during the mid-Eighties.  Giving us the 1980s oil glut.

Of course, this rise in non-OPEC production was a direct result of the 1973 Oil Crisis.  Many of the OPEC members are Muslim nations.  Who don’t like the state of Israel.  In response to the West’s support of Israel in the Yom Kippur War (1973) OPEC announced an oil embargo on those nations who helped Israel.  Giving us the 1973 oil crisis.  Where this sudden reduction in supply caused the price of oil to soar.  Making the oil business a very profitable business.  Causing those non-OPEC producers to enter the market.  Then the Iranian Revolution (1979) disrupted Iranian crude production.  Keeping Iranian oil off the market.  This reduction in demand caused oil prices to rise.  Then Jimmy Carter broke off diplomatic relations with the Iranian state.  And boycotted their oil when it returned to the market.  Further encouraging the non-OPEC producers to bring more oil to market.  Meanwhile U.S. demand fell because of those high prices.  And our switch to smaller, 4-cyclinder, front wheel drive cars.  Saying goodbye to our beloved muscle cars of the Sixties and Seventies.  And the V-8 engine.  The combination of low demand and high supply caused oil prices to fall over 70% by 1986.  Giving us the oil glut of the 1980s.  When gasoline was cheap.  Enticing the V-8 engine back into the market.

Improved Fuel Economy AND Increased Oil Supplies can Reduce the Price at the Pump

So, yes, Virginia.  The amount of oil entering the market matters.  The more of it there is the cheaper it will be.  As history has shown.  When less oil entered the market prices rose.  When more oil entered the market prices fell.  And anything that can affect the supply of oil making it to market will affect the price of oil.  (And everything downstream of oil.  Jet fuel.  Diesel.  And gasoline.)  Wars.  Regional instability.  And governmental regulation. 

So what are things that will bring more oil to market?  Well there’s the obvious.  You drill for more oil.  This is so obvious but a lot of people refuse to accept this economic principle.  As supply increases prices fall.  The 1980s oil glut proved this.  Even John Maynard Keynes has graphs showing this in his Keynesian economics.  The economics of choice for governments everywhere.   Yet there are Keynesian politicians who avert their eyes to this economic principle.  So there’s that.  More drilling.  You can also make the permitting process easier to drill for oil.  You can open up federal lands currently closed to drilling.  And once you find oil you bring it to market.  As quickly as you can.  And few things are quicker than pipelines.  From the oil fields.  To the oil refineries.  (And then jet fuel, diesel and gasoline pipelines from the refineries to dispensing centers).  So before oil fields are ready to produce you start building pipelines from those fields to the refineries.  Or you build new refineries.

Improving fuel economy did help reduce our demand for imported oil in the Eighties.  As well as lowered the price for that imported oil.  But it wasn’t fuel economy alone.  The non-OPEC nations were increasing production from the mid-Seventies through the mid-Eighties.  Without that oil flooding the market oil prices wouldn’t have fallen 70%.  And they won’t fall again if we ONLY try to reduce our demand for foreign oil.  For reducing demand is marginal at best in reducing oil prices. 

Only if we Drill and Build Pipelines can we Reduce the Price at the Pump

For there are no electric airplanes.  The cost to electrify all railroad tracks is too prohibitive to consider.  The capital costs to build that electrical infrastructure.  The maintenance costs to maintain it.  And the electricity costs from the increased demand for electrical power while supply remains the same.  Or falls.  Because excessive regulation inhibits the building of new power plants.  And speeds up the shutdown of older plants.  Especially coal-fired because they pollute too much.  And hydro power.  Because of the environmental impact of dams.  Severely straining our electric grids.  And moving into electric cars will stress our electric grids even further.  Leading to brown outs.  And rolling blackouts.   Or worse.  Causing wires to overheat and sag, coming into contact with trees.  Shorting out.  Causing cascading blackouts as power plants disconnect from the grid to prevent damage from the resulting current surges.  Like they did in the Northeast Blackout of 2003.

You can’t replace oil with electricity.  In some cases there is just no electric equivalent.  Such as the airplane.  Or the cost of moving from oil to electricity is just prohibitive.  Such as updating the nation’s electrical infrastructure to meet an exploding demand.  Which leaves oil.  We need it.  And will keep using it.  Because there is no better alternative.  Yet.  So we need to produce it.  And do everything we can to help bring that oil to market.  Not fight against it.  And it all starts with drilling. 

We must drill.  Bring that oil up from under the ground.  Put it into a pipeline.  And pump it to a refinery.  If we do this enough we will be less dependent on foreign oil.  And have more control over the price at the pump.


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Steam Locomotive, Diesel Electric Locomotive, Interstate Highway System, Airplane, Air Travel, Refined Petroleum Products and Pipelines

Posted by PITHOCRATES - March 21st, 2012

Technology 101

The Diesel Electric Locomotive could pull a Train Cross Country and into the Heart of a City with Minimal Pollution

The 1920s were transformative years.  The Roaring Twenties.  It’s when we moved from animal power to mechanical power.  From the horse and plow to the tractor.  From steam power to electric power.  From the telegraph to the telephone.  From the gas lamp to the electric light.  From crowded mass transit to the freedom of the automobile.  From manual labor to the assembly line. 

You can see a glimpse of that world in 1920’s Steam Train Journey Across the United States – Westward Ho!  The beginning of the modern city.  With modern street lighting.  Electric power and telephone overhead wiring.  Streets crowded with automobiles.  Tractors and mechanical harvesters on the farm.  And, of course, the steam locomotive.  Connecting distant cities.  Transferring the freight to feed the modern industrial economy.  And shipping the finished goods.  As well as all that food from the farm to our grocer’s shelves.  Proving the 1920s were vibrant economic times.  With real economic growth.  And not a speculative bubble.  For there was nothing speculative about all of this technology becoming a part of our way of life.

Of course the technology wasn’t perfect.  The coal-burning locomotives belched black smoke and ash wherever they went.  Which wasn’t all that bad in the open country where a train or two passed.  But it was pretty dangerous in tunnels.  Which had to be short lest they suffocated their passengers.  (One of the reasons why all subways use electric trains).  Making for some long and winding railroads in mountainous terrain.  To go around mountains instead of under them.  Slowing trains and increasing travel time.  And they were pretty unpleasant in the cities.  Where the several rail lines converged.  Bringing a lot of coal-burning locomotives together.  Creating a smoky haze in these cities.  And leaving a layer of ash everywhere.  The cleaner diesel-burning locomotives changed that.  The diesel electric locomotive could pull a train cross country and into the heart of a city with a minimal amount of pollution.  As long as they kept their engines from burning rich.  Which they would if they operated them with dirty air filters.  Reducing fuel efficiency by having the air-fuel mixture contain too much fuel.  And causing these engines to belch black smoke.  Similar to diesel trucks running with dirty air filters.

Airplanes can travel between Two Points in a Direct Line at Faster Speeds than a Train or Bus with Minimal Infrastructure

Trains shrunk our country.  Brought distant cities together.  Allowing people to visit anywhere in the continental United States.  And the railroads profited well from all of this travel.  Until two later developments.  One was the interstate highway system.  That transferred a lot of freight from the trains to trucks.  As well as people from trains to buses and cars.  And then air travel.  That transferred even more people from trains to airplanes.  This competition really weakening railroads’ profits.  And pretty much put an end to passenger rail.  For people used the interstate highway system for short trips.  And flew on the long ones.  Which was quicker.  And less expensive.  Primarily because airplanes flew over terrain that was costly to avoid.

Highways and railroads have to negotiate terrain.  They have to wind around obstacles.  Go up and down mountainous regions.  Cross rivers and valleys on bridges.  Travel under hilly terrain through tunnels.  And everywhere they go they have to travel on something built by man.  All the way from point A to point B.  Now trucks, buses and cars have an advantage here.  We subsidize highway travel with fuel taxes.  Trucking companies, bus lines and car owners didn’t have to build the road and infrastructure connecting point A to point B.  Like the railroads do.  The railroads had to supply that very extensive and very expensive infrastructure themselves.  Paid for by their freight rates and their passenger ticket sales.  And when there were less expensive alternatives it was difficult to sell your rates and fares at prices high enough to support that infrastructure.  Especially when that lower-priced alternative got you where you were going faster.  Like the airplane did.

Man had always wanted to fly.  Like a bird.  But no amount of flapping of man-made wings got anyone off the ground.  We’re too heavy and lacked the necessary breast muscles to flap anything fast enough.  Not to mention that if we could we didn’t have any means to stabilize ourselves in flight.  We don’t have a streamline body or tail feathers.  But then we learned we could create lift.  Not by flapping but my pushing a curved wing through the air.  As the air passes over this curved surface it creates lift.  Generate enough speed and you could lift quite a load with those wings.  Including people.  Cargo.  Engines.  And fuel.  Add in some control elements and we could stabilize this in flight.  A tail fin to prevent yawing (twisting left and right) from the direction of flight.  Like a weathercock turns to point in the direction of the wind.  And an elevator (small ‘wing’ at the tail of the plane) to control pitch (nose up and nose down).  Ailerons correct for rolling.  Or turn the plane by rolling.  By tipping the wings up or down to bank the airplane (to turn left the left aileron goes up and the right aileron goes down).  And using the elevator on the take-off roll to pitch the nose up to allow the plane to gain altitude.  And in flight it allows the plane to ascend or descend to different altitudes.  Put all of this together and it allows an airplane to travel between points A and B while avoiding all terrain.  In a direct line between these two points.  At a much faster speed than a train, bus or car can travel.  And the only infrastructure required for this are the airports at points A and B.  And the few en route air traffic controllers between points A and B. Which consisted of radar installations and dark rooms with people staring at monitors.  Communicating to the aircraft.  Helping them to negotiate the air highways without colliding into other aircraft.  And air travel took off, of course, in the 1920s.  The Roaring Twenties.  Those glorious transformative years.

Refined Petroleum Products have Large Concentrations of Energy and are the Only Fuel that allows Air Travel

The most expensive cost of flying is the fuel cost.  The costlier it is the costlier it is to fly.  Not so for the railroads.  Because their fuel costs aren’t the most expensive cost they have.  Maintaining their infrastructure is.  They can carry incredible loads cross country for a small price per unit weight.  Without swings in fuel prices eating into their profits.  Making them ideal to transfer very large and/or heavy loads over great distances.  Despite dealing with all the headaches of terrain.  For neither a plane nor a truck can carry the same volume a train can.  And heavier loads on a plane take far greater amounts of fuel.  This additional fuel itself adding a great amount of weight to the aircraft.  Thus limiting its flight distance.  Requiring refueling stops along the way.  Making it a very expensive way to transport heavy loads.  Which is why we ship coal on trains.  Not on planes.

Trains are profitable again.  But they’re not making their money moving people around.  Their money is in heavy freight.  Iron ore.  Coke.  And, of course, coal.  To feed the modern industrial economy.  Stuff too heavy for our paved roads.  And needed in such bulk that it would take caravans of trucks to carry what one train can carry.  But even trains can’t transport something in enough bulk to make it cost efficient.  Refined petroleum.  Gasoline.  Diesel.  And jet fuel.  For these we use pipelines.  From pipelines we load gas and diesel onto trucks and deliver it to your local gas station.  We run pipelines directly to the fuel racks in rail yards.   And run pipelines to our airports.  Where we pump jet fuel into onsite storage tanks in large fuel farms.  Which we then pump out in another set of pipelines to fueling hydrants located right at aircraft gates.

These refined petroleum products carry large concentrations of energy.  Are easy to transport in pipelines.  Are portable.  And are very convenient.  Planes and trains (as well as ships, busses and cars) can carry them.  Allowing them to travel great distances.  Something currently no renewable energy can do.  And doing without them would put an end to air travel.  Greatly increase the cost of rail transport (by electrifying ALL our tracks).  Or simply abandoning track we don’t electrify.  Making those far distant cities ever more distant.  And our traveling options far more limited than they were in the 1920s.  Turning the hands of time back about a hundred years.  Only we’ll have less.  And life will be less enjoyable.


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