View Single Post
Old 11-04-2009, 12:48 AM   #1 (permalink)
Batman Junior
MetroMPG's Avatar
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,877

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 57.23 mpg (US)
Thanks: 3,560
Thanked 6,363 Times in 3,293 Posts
Getting 45 MPG at 207 MPH .... can you pulse and glide an airplane?

Autopia has an interesting piece about an airborne fuel economy competition won by this funky looking plane getting 45 MPG at 207 MPH:

Source: Getting 45 MPG at 207 MPH | Autopia |

Now the article says:

If 45 mpg doesn’t sound like much, consider that an airplane’s engine is constantly working to keep the plane aloft and moving forward. There’s no coasting, which you can get away with in a car using the old pulse-and-glide.
I know there are a few pilots around here. What I wonder is whether that quote about P&G is true. I would think that you could pulse & glide an airplane, pulse = gain altitude; glide = well, gliding.

And theoretically you should be able to pin an airplane's engine's load pretty much indefinitely at exactly the right BSFC point for max pulse efficiency, no?

Full article: Getting 45 MPG at 207 MPH | Autopia |

Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown

has launched a forum for the efficient new Mitsubishi Mirage - fuel efficiency info for Geo Metro owners - electric car conversion on a beer budget
  Reply With Quote