On 26/05/2021 21:13, Roger Hayter wrote:
On 26 May 2021 at 20:12:33 BST, "The Natural Philosopher"
wrote:

On 26/05/2021 18:01, newshound wrote:
Actually I would not be surprised if washing machines had not done that,
and aero engine efficiency improvement is probably in double digits over
a decade.

Bless!

Quite the ArtStudent aren't you?

Gas turbine efficiency as such us where it was from the get-go - about
37%. Once you have made the transition to high bypass turbofans, that's
pretty much it.

That still leaves room for aerodynamic improvements, plane weight improvements
and reducing the number of engines. So he may be right about overall
passenger carrying cost minimisation over recent years.


yes, but that is not 'aero engine efficiency'

we were discussing car batteries, and he was using that example to imply
that car batteries would likewise improve. In fact he and you do the
exact opposite. By pointing out that the best way to imnprove electric
car range would be - and is - to work not in the battery but on vehicle
weight, aerodynamics and drag reduction in all possible ways, as well as
regenerative braking...

....Because battery efficiency ain't going anywhere,


--
In a Time of Universal Deceit, Telling the Truth Is a Revolutionary Act.

- George Orwell