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> carburettor Excuse me? Carburettor? In 2017? > You have to tune (lean) the fuel input to reduce fuel consumption and prevent spark plug fouling, but not lea

> carburettor Excuse me? Carburettor? In 2017? > You have to tune (lean) the fuel input to reduce fuel consumption and prevent spark plug fouling, but not lean it too much that you overheat the engine. Can't the engine management software take care of this?

charlesdenault 9y ago
Most flight schools have much older aircraft-- think 70s and 80s-- that have carbs. Newer aircraft are fuel injected, but often more expensive per hour.
- needusername 9y ago
  VW Golf are fuel injected since 1975.
  - Govindae 9y ago
    But they've only been able to fly since 2016.
  - DonaldFisk 9y ago
    Cars are different, though you could have pointed out that the Messerschmitt BF-109 had fuel injection in the 1930s.
chipsa 9y ago
An average car company makes millions of cars. Probably millions of a given model. Cessna has made ~44k 172 Skyhawks. It's one of the most produced aircraft, and it's been in production largely unchanged since 1956. I think Tesla is going to make more Model 3s this year than Cessna is going to make Skyhawks.
- needusername 9y ago
  Don't they cost hundreds of thousands of dollars? Surely you're going to find an engine manufacturer that can build you an engine that's not half a century old.
  - 24gttghh 9y ago
    If it ain't broke...but the 172[R and S] has been using a fuel-injected engine since 1996[0] [0]https://en.wikipedia.org/wiki/Lycoming_O-360 https://en.wikipedia.org/wiki/Lycoming_O-360
    - aphextron 9y ago
      And the flight hour cost of one of these is double the price of a 1970s/80s carbureted 152. Guess which one the majority of student pilots are learning on.
  - mikeash 9y ago
    Of course, and if you want something like that, you can find aircraft manufacturers using more modern engines. Want a car engine in an airplane? You can have that. Want a fuel-injected digitally-controlled turbocharged water-cooled diesel? Step right this way. The big, old manufacturers like Cessna tend to be really conservative, though. They have something that's Good Enough and they have little incentive to make radical changes. Part of this is because a light aircraft's powertrain is safety-critical, unlike automobiles. In a car, if your engine explodes, you're stranded. In a small airplane, depending on where you are when it happens, you're probably hurt or killed. If you make a radical change to your engine, and that change results in a failure that kills a customer, it looks bad. Newer manufacturers seem more willing to push the envelope in this respect.
mpweiher 9y ago
What's this "engine management software" you speak of? :-) Seriously, GA aircraft engines are seriously old tech.
mnw21cam 9y ago
You can indeed get engine management computers, but the thinking in the aviation world is that this would be just another thing that could go wrong. In any case, if the computer were to fail, the pilot would have to know how to manage the engine manually. Aircraft engines have various design choices designed to make the things more reliable, such as dual independent ignition systems that are isolated from the battery. The pilot deliberately has independent control over things like fuel/air mixture for good reasons.

charlesdenault 9y ago

Most flight schools have much older aircraft-- think 70s and 80s-- that have carbs. Newer aircraft are fuel injected, but often more expensive per hour.

needusername 9y ago
VW Golf are fuel injected since 1975.
- Govindae 9y ago
  But they've only been able to fly since 2016.
- DonaldFisk 9y ago
  Cars are different, though you could have pointed out that the Messerschmitt BF-109 had fuel injection in the 1930s.

chipsa 9y ago

An average car company makes millions of cars. Probably millions of a given model. Cessna has made ~44k 172 Skyhawks. It's one of the most produced aircraft, and it's been in production largely unchanged since 1956. I think Tesla is going to make more Model 3s this year than Cessna is going to make Skyhawks.

needusername 9y ago
Don't they cost hundreds of thousands of dollars? Surely you're going to find an engine manufacturer that can build you an engine that's not half a century old.
- 24gttghh 9y ago
  If it ain't broke...but the 172[R and S] has been using a fuel-injected engine since 1996[0] [0]https://en.wikipedia.org/wiki/Lycoming_O-360 https://en.wikipedia.org/wiki/Lycoming_O-360
  - aphextron 9y ago
    And the flight hour cost of one of these is double the price of a 1970s/80s carbureted 152. Guess which one the majority of student pilots are learning on.
- mikeash 9y ago
  Of course, and if you want something like that, you can find aircraft manufacturers using more modern engines. Want a car engine in an airplane? You can have that. Want a fuel-injected digitally-controlled turbocharged water-cooled diesel? Step right this way. The big, old manufacturers like Cessna tend to be really conservative, though. They have something that's Good Enough and they have little incentive to make radical changes. Part of this is because a light aircraft's powertrain is safety-critical, unlike automobiles. In a car, if your engine explodes, you're stranded. In a small airplane, depending on where you are when it happens, you're probably hurt or killed. If you make a radical change to your engine, and that change results in a failure that kills a customer, it looks bad. Newer manufacturers seem more willing to push the envelope in this respect.

mpweiher 9y ago

What's this "engine management software" you speak of? :-) Seriously, GA aircraft engines are seriously old tech.

mnw21cam 9y ago

You can indeed get engine management computers, but the thinking in the aviation world is that this would be just another thing that could go wrong. In any case, if the computer were to fail, the pilot would have to know how to manage the engine manually. Aircraft engines have various design choices designed to make the things more reliable, such as dual independent ignition systems that are isolated from the battery. The pilot deliberately has independent control over things like fuel/air mixture for good reasons.