Theoretically, yes…..but in practice a negligible improvement.
My point was, donβt take for granted what the trip-computer in your car tells you…..mine just lies!
It tells you the truth based on 10 second snapshots.
One hit of the gas to get round an annoying truck or Volvo and you can undo miles of 50mph conservation. But it is best to use the MoT qualified/certified milometer.
In a previous job, I had a 60 minute jouney to work, 95% of that journey was on the M/way. So, with that sort of boredom daily, I experimented. At 56ish mph the journey took 75 mins, but my mpg was in the low 50’s per gal. (It was a Mark 3 Golf Ryder 1600).
At 70 it took the hour, and MPG was 42.
At 80/90 (It was before cameras on the M62/M57) it took 52 mins but the MPG was down at 20 something. Pathetic, just proves that to save 8 minutes (Big deal!!!!) I used twice the fuel, drove in twice the danger and was on the look-out for Police instead of looking out for problems.
Luckily now, I walk to work, 500 yards.
As for the MPG decreasing because the tank is full, this must be true, cannot dispute science.
Personally, I fill up, run to the red light (40 miles from empty) and fill again. But a tankful now lasts me 2 months, and my MPG is pathetic because it’s all on short runs.
“He comes out of the plane and starts falling.”
…and money was spent on educating this reporter.
I suppose the first time I was stabbed was the nearest I’ve come. Fortunately, the blade was a little too short and the wound a little too low to have done me any great harm.
Other than that it would be a cable break at just a couple of hundred feet in a Kirby Cadet. Unable to unhook the remains of the cable the pilot S – turned frantically and just got us down within the airfield boundary. Superb bit of flying. Just 14 at the time and scared witless (feel free to replace the ‘w’ with ‘sh’) I thought “that’s me and gliding done for the day.” How wrong I was. . I was sent straight back up in a Sedbergh and again afterwards in another Kirby Cadet.
I’m thankful that on one occasion when travelling down the motorway at night, and feeling very tired after following an artic for what seemed like hours, I decided to take a break. A few miles down the motorway the artic I had been following had inexplicably jackknifed and took out several cars as it slid down the carriageway on it’s side. My impatience at the three hour delay while room was made for us to pass was somewhat tempered by the thought that if I hadn’t stopped I might well have been caught up in the accident.
Regards,
kev35
Your opening line indicates you have a collection of stabbings???
Anyway, lucky escape re truck.
I suppose the first time I was stabbed was the nearest I’ve come. Fortunately, the blade was a little too short and the wound a little too low to have done me any great harm.
Other than that it would be a cable break at just a couple of hundred feet in a Kirby Cadet. Unable to unhook the remains of the cable the pilot S – turned frantically and just got us down within the airfield boundary. Superb bit of flying. Just 14 at the time and scared witless (feel free to replace the ‘w’ with ‘sh’) I thought “that’s me and gliding done for the day.” How wrong I was. . I was sent straight back up in a Sedbergh and again afterwards in another Kirby Cadet.
I’m thankful that on one occasion when travelling down the motorway at night, and feeling very tired after following an artic for what seemed like hours, I decided to take a break. A few miles down the motorway the artic I had been following had inexplicably jackknifed and took out several cars as it slid down the carriageway on it’s side. My impatience at the three hour delay while room was made for us to pass was somewhat tempered by the thought that if I hadn’t stopped I might well have been caught up in the accident.
Regards,
kev35
Your opening line indicates you have a collection of stabbings???
Anyway, lucky escape re truck.
Video of the Airbus from TACA which overshot the runway. No fatalities reported.
The link is to the live broadcast…useless now, some apartment block fire in Texas. May as well remove the link.
Pete,
we could have been playing the last post, about your last post. (Groan).
You now know better than to go anywhere near a river in flood. Apart from wet slippery banks like yours, you don’t know if the flow has undercut the bank, making it soft and ready to give with just a few pounds of pressure. Undercuts can go dozens of yards from the bank, in the form of a sink-hole leading to an underground stream that is harmless until the river is in flood.
And that water is moving at what, about 30mph. You’ve no chance.
I used to live near the River Usk in Wales, I have 1st hand experience of watching the River rise 1 metre per hour for 4 hours! It’s scary. Luckily, the Usk falls as fast as it rises, so once the rain stops in the Brecon Beacons, the river level plummeted.
I now live near some of the fastest and most dangerous tides in the world! I can’t believe it sometimes, the tide (This is at sea not in an estuary) can stop a motor boat. I’ve seen small motor boats give up! They switch engine off (Or down to tickover) and let it drift back, at incredible speed. Swimmers would quickly become drowners.
As for my close shaves, car crash. If the car had hit the tree 2 feet further fwd, my head would have hit the tree. At 7am one Friday morning on my way to work, I fish-tailed on a bad bend (Long story but the Council have now removed the adverse camber…and I was not speeding, Police confirmed) and hit a tree sideways. The tree trunk came about 12 inches into kerbside rear seat-well. As it hit, I leaned out of my seatbelt and my head broke the pax window. (Thankfully where the tree wasn’t!!!). As I shot back into my seat, I caught the back of my head on the twisted metalwork of the sunroof, which had collapsed inwards.
I got out, lots of blood, I could hardly breathe and really did feel that this was it.
After about 5 minutes, I heard a car stop, and it was a first aider. Not any first aider, but a Crash crew member from the Aerodrome I was working at! He knew exactly what to do and I think he probably saved my life, I was lapsing into uncontiousness. I bought him a large bottle of very exclusive Brandy on my return to work, some 21 weeks later.
I was in Hospital for 4 days, I actually could not move for 2 days. They took 37 X-rays of the head/neck/spine and could not believe there were no fractures.
The beautiful Italian nurse that stitched the back of my head wouldn’t put extra stitches in, and pull them tight, as a sort of facelift. LoL.
It still sends a shiver down my spine when I recall that morning.
Pete,
we could have been playing the last post, about your last post. (Groan).
You now know better than to go anywhere near a river in flood. Apart from wet slippery banks like yours, you don’t know if the flow has undercut the bank, making it soft and ready to give with just a few pounds of pressure. Undercuts can go dozens of yards from the bank, in the form of a sink-hole leading to an underground stream that is harmless until the river is in flood.
And that water is moving at what, about 30mph. You’ve no chance.
I used to live near the River Usk in Wales, I have 1st hand experience of watching the River rise 1 metre per hour for 4 hours! It’s scary. Luckily, the Usk falls as fast as it rises, so once the rain stops in the Brecon Beacons, the river level plummeted.
I now live near some of the fastest and most dangerous tides in the world! I can’t believe it sometimes, the tide (This is at sea not in an estuary) can stop a motor boat. I’ve seen small motor boats give up! They switch engine off (Or down to tickover) and let it drift back, at incredible speed. Swimmers would quickly become drowners.
As for my close shaves, car crash. If the car had hit the tree 2 feet further fwd, my head would have hit the tree. At 7am one Friday morning on my way to work, I fish-tailed on a bad bend (Long story but the Council have now removed the adverse camber…and I was not speeding, Police confirmed) and hit a tree sideways. The tree trunk came about 12 inches into kerbside rear seat-well. As it hit, I leaned out of my seatbelt and my head broke the pax window. (Thankfully where the tree wasn’t!!!). As I shot back into my seat, I caught the back of my head on the twisted metalwork of the sunroof, which had collapsed inwards.
I got out, lots of blood, I could hardly breathe and really did feel that this was it.
After about 5 minutes, I heard a car stop, and it was a first aider. Not any first aider, but a Crash crew member from the Aerodrome I was working at! He knew exactly what to do and I think he probably saved my life, I was lapsing into uncontiousness. I bought him a large bottle of very exclusive Brandy on my return to work, some 21 weeks later.
I was in Hospital for 4 days, I actually could not move for 2 days. They took 37 X-rays of the head/neck/spine and could not believe there were no fractures.
The beautiful Italian nurse that stitched the back of my head wouldn’t put extra stitches in, and pull them tight, as a sort of facelift. LoL.
It still sends a shiver down my spine when I recall that morning.
But you have to experience one extreme to the other before you can fix your ‘moderation’ point!:D
It returns with practice. In-between wives, I had 4 years of flying solo again. 1996 to 2000, and I was in my early 40’s at the time. Out 6 nights a week, almost every week.
I built up my ability to drink, and was soon able to reach British Standard Supping Rate of 4 pints per hour. So, starting at 8pm until 2am, it could get into the 20 pints level. Most of it went straight through, I may as well have stood at the urinal whilst drinking. I was also running very long distances at that time, 9 miles per night was a breeze, sometimes 16 miles just to kill 2 hours. So, my body needed the liquid.
My liquid intake has always been massive, I can easily shift 10 or 11 pints of Tea during my 8 hour work day.
However, last Christmas, on the “Works do” I drank about 9 pints and a bottle of red wine. Sick as a dog!!! Bad body all the next day.
I think I had a Single malt at some point. It must have been that which made me ill, one must never mix the grape and the grain!!!!! LoL.
But you have to experience one extreme to the other before you can fix your ‘moderation’ point!:D
It returns with practice. In-between wives, I had 4 years of flying solo again. 1996 to 2000, and I was in my early 40’s at the time. Out 6 nights a week, almost every week.
I built up my ability to drink, and was soon able to reach British Standard Supping Rate of 4 pints per hour. So, starting at 8pm until 2am, it could get into the 20 pints level. Most of it went straight through, I may as well have stood at the urinal whilst drinking. I was also running very long distances at that time, 9 miles per night was a breeze, sometimes 16 miles just to kill 2 hours. So, my body needed the liquid.
My liquid intake has always been massive, I can easily shift 10 or 11 pints of Tea during my 8 hour work day.
However, last Christmas, on the “Works do” I drank about 9 pints and a bottle of red wine. Sick as a dog!!! Bad body all the next day.
I think I had a Single malt at some point. It must have been that which made me ill, one must never mix the grape and the grain!!!!! LoL.
In Layman terms the turbojet engine coverts a small amount of air through a large change in velocity whereas the propeller converts a large amount of air through a smaller change in velocity.
The Turboprop engine is just about identical to the turbofan engine but the prop is on the outside with the turboprop. It works something like this – The intake air is ducted to the low pressure (NL) axial compressor and then on to the high pressure (NH) centrifical compressor for a further stage of compression, it then enters internal ducts and is discharged into the combustion chamber where the fuel is added & ignited. Gases exiting this section impact onto a single stage NH turbine, the turbine extracts energy from the flow & drives the shaft directly connected to the NH compressor. Mounted behind the NH turbine is a single stage NL turbine, which also extracts gas energy. It drives a shaft connected directly to the NL compressor. As the combustion gases continue to flow rearward they are directed towards the 2-stage power turbine assembly. The power turbines turn as a single unit extracting the majority of gas energy remaining to rotate a shaft connected to the reduction gearbox at the front of the engine, it is through this reduction gearbox that power is transmitted to the propeller.
Turboprops have their limitations in the fact that they are limited to how fast they can spin, the limitation comes in the diameter of the blades, simple physics will tell you that with any “wheel” the outside of the wheel travels faster than the inside of the wheel. The same applies then with the prop, if you either spin them too fast, or their diameter is large then the outside of the blades, or tips will go through Mach1, this then produces drag as mach buffet takes over eventually leading to mach stall. Think of a propeller blade as an airfoil, or wing, because that’s exactly what it is, so it behaves in exactly the same way.
The reduction gearbox that bdn12 talks about is there to reduce the effect of the relative shaft speed of the turbine when linked to the prop, as you can expect the core shaft will be turning at a high velocity, in my aircraft if my memory serves me correctly this is about 17,000prm, the max we can turn the props is 1020rpm.
With all modern turboprops (& most complex light twins) the propellers are governed by a CSU, or Constant Speed Unit, so the shaft output is kept at a set speed, the thrust then comes from the propeller pitch angle, again with this comes limitations.In simple terms with turbojet engines the air is sucked in through the first set of compressor blades, then enters a combustion chamber where fuel is added, the mixture is then ignited which then expands very quickly indeed, the hot gas is then exhausted out the back of the combustion chamber where it passes over another turbine which is driving the shaft that rotates the compressor, so it’s a continuous cycle.
The thrust element comes from Mr Isaac Newton’s 3rd law of motion – for every action, there is an equal and opposite reaction. Herein lies the answer to your question about how does a turbofan produce more thrust than a turboprop, imagine all that air being exhausted out the rear of a turbofan (Newton again) compared with the amount of “thrust” being produced by a constant speed variable pitch propeller. Incidentally the turboprop turbine engine does produce about 10% of thrust from the residual hot exhaust exiting the rear of the engine, but the majority of the heat energy is lost when turning all those turbines.
Clear as mud? thought so π
Let’s hope he doesn’t want to know how an Intake works, especially a supersonic intake!!
All that maths, it takes me back….to nightmares!
So, sell another object, say a Bic Biro pen, and offer as a free gift a mounted picture.
This was done in the early days of Sunday trading, where a big firm (MFI I think) offered a pound of carrots for Β£199 with a free wardrobe. At the time, fresh veg was allowed to be sold Sundays but not furniture.
When I was young, I drank my own body mass in ale, but didn’t (Nor my pals)seem to get off my skull and seek fights etc.
There is some other factor working these days.
Also, the old guys in the pub would clip you round the ear if you mis-behaved, and we respected that. These days I shudder to think what would happen in most YPV’s (The brewery calls them Young Person Venues!!!)
Even then we went for flavour over strength.
These days, I don’t get out much for a night on the ale, it’s too expensive for a start.
When i do I end up drinking too much…simply because I can’t take it like the old days LoL.
When I was young, I drank my own body mass in ale, but didn’t (Nor my pals)seem to get off my skull and seek fights etc.
There is some other factor working these days.
Also, the old guys in the pub would clip you round the ear if you mis-behaved, and we respected that. These days I shudder to think what would happen in most YPV’s (The brewery calls them Young Person Venues!!!)
Even then we went for flavour over strength.
These days, I don’t get out much for a night on the ale, it’s too expensive for a start.
When i do I end up drinking too much…simply because I can’t take it like the old days LoL.
Reading that made my morning, I thought I was the only one who thought the same, well not quite, I gather it’s also Madonnas favourite beer, she caused a sensation at the Brewery in Keighley after she announced the fact on a TV chat show. They had to double the production overnight as all the kids in the area dumped the Stella/Becks crap and started demanding Landlord. I gather that Timothy Taylors sent her a cratefull and a thank you for the best free publicity they could possibly get.
Try a pub crawl round Keighley, TT own most of the pubs, better hurry though before the local religous radicals get the place shut down.
I used to drive 35 mins to a pub in Halifax, it may have been called the Shay? It was down a 1 in 3 hill between two mills. There was a stream at the bottom.
He sold “Best”, “Golden Best” and “Landlord”. She drove home. π
I was once in CAMRA for my sins, went to plenty of festivals, tasted tens of dozens of beers but I always came back to Landlord. It is the benchmark.
I am hundreds of miles away from there now, but thankfully my local free-house is run by a Monkey Hanger, not exactly Yorkshire but he knows that Northern brews are best and has a plethora on sale. 1:38am, he’ll still be open…I just might go for a pint now!!
Some ales are brewed for strength, but taste like battery acid, the ones brewed for flavour tend to be in the 3-4% area, not strong – just mouthgasmic.
The only Lager worthy of entry to a festival are the German and Belgian ones, brewed under the local purity laws.
The rest are just overpriced blingwater.
Reading that made my morning, I thought I was the only one who thought the same, well not quite, I gather it’s also Madonnas favourite beer, she caused a sensation at the Brewery in Keighley after she announced the fact on a TV chat show. They had to double the production overnight as all the kids in the area dumped the Stella/Becks crap and started demanding Landlord. I gather that Timothy Taylors sent her a cratefull and a thank you for the best free publicity they could possibly get.
Try a pub crawl round Keighley, TT own most of the pubs, better hurry though before the local religous radicals get the place shut down.
I used to drive 35 mins to a pub in Halifax, it may have been called the Shay? It was down a 1 in 3 hill between two mills. There was a stream at the bottom.
He sold “Best”, “Golden Best” and “Landlord”. She drove home. π
I was once in CAMRA for my sins, went to plenty of festivals, tasted tens of dozens of beers but I always came back to Landlord. It is the benchmark.
I am hundreds of miles away from there now, but thankfully my local free-house is run by a Monkey Hanger, not exactly Yorkshire but he knows that Northern brews are best and has a plethora on sale. 1:38am, he’ll still be open…I just might go for a pint now!!
Some ales are brewed for strength, but taste like battery acid, the ones brewed for flavour tend to be in the 3-4% area, not strong – just mouthgasmic.
The only Lager worthy of entry to a festival are the German and Belgian ones, brewed under the local purity laws.
The rest are just overpriced blingwater.