Go Back   EcoModder Forum > EcoModding > General Efficiency Discussion
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 12-17-2009, 03:29 PM   #1 (permalink)
Master EcoModder
 
The Atomic Ass's Avatar
 
Join Date: Oct 2008
Location: Mason, OH
Posts: 535

Priinocchio - '17 Toyota Prius Two Eco
90 day: 66.72 mpg (US)
Thanks: 11
Thanked 20 Times in 17 Posts
Fuel economy in the air (diesel airplanes?)

So I was reading the thread I can no longer find a while ago, and the thought has been roiling around in my mind since... Most prop planes are spark-ignition, aren't they?

Has anyone ever built a diesel prop plane?

__________________
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 12-17-2009, 03:40 PM   #2 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
Good question. I'm intrigued. (Actually, I'm Christ. Intrigued is another member.) Nonetheless, I'm interested to see what kind of information gets dragged up in this thread.
__________________
"ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
The Following User Says Thank You to Christ For This Useful Post:
Cd (12-18-2009)
Old 12-17-2009, 04:17 PM   #3 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,190
Thanks: 179
Thanked 1,522 Times in 1,123 Posts
...yes, diesel engines were used a lot during the 1920's-1930's:

http://74.125.155.132/search?q=cache...&ct=clnk&gl=us

...on a similar note -- I'd like to know "why?" EPA-fuel economy "guidelines" haven't also been applied (shoved up?) to the aircraft industry yet?

Last edited by gone-ot; 12-17-2009 at 04:23 PM..
  Reply With Quote
Old 12-17-2009, 04:20 PM   #4 (permalink)
Master EcoModder
 
Join Date: Feb 2009
Location: Phoenix
Posts: 595
Thanks: 106
Thanked 113 Times in 71 Posts
i have to imagine diesels are somewhat differently affected by altitude since their compression ratio is much more critical to combustion
__________________
2005 Escape 2.3 MT 2WD
2002 Mustang 3.8 AT
2015 Ram 1500 5.7L 4WD
2002 Motobecane 700DS
  Reply With Quote
Old 12-17-2009, 08:08 PM   #5 (permalink)
Master EcoModder
 
The Atomic Ass's Avatar
 
Join Date: Oct 2008
Location: Mason, OH
Posts: 535

Priinocchio - '17 Toyota Prius Two Eco
90 day: 66.72 mpg (US)
Thanks: 11
Thanked 20 Times in 17 Posts
Quote:
Originally Posted by shovel View Post
i have to imagine diesels are somewhat differently affected by altitude since their compression ratio is much more critical to combustion
What better excuse can there be to put a turbo on an engine. Although I was thinking in terms of a <10,000ft. type of plane.
__________________
  Reply With Quote
Old 12-17-2009, 09:39 PM   #6 (permalink)
Intermediate EcoDriver
 
Mustang Dave's Avatar
 
Join Date: May 2009
Location: Northern Arizona - It's a DRY cold..
Posts: 669

Trigger - '07 Ford Mustang V6 Premium Coupe
Team Mustang
Sports Cars
90 day: 33.47 mpg (US)

Big Red (retired) - '89 Ford F-250 4wd Custom
90 day: 18.13 mpg (US)

Big Red II - '13 Ford F-150 FX4
Pickups
90 day: 19.69 mpg (US)
Thanks: 162
Thanked 129 Times in 102 Posts
The German Junkers bombers of WWII were diesel-powered.
__________________
Fuel economy is nice, but sometimes I just gotta put the spurs to my pony!



Quote:
Originally Posted by thatguitarguy View Post
Just 'cuz you can't do it, don't mean it can't be done...
Quote:
Originally Posted by elhigh View Post
The presence of traffic is the single most complicating factor of hypermiling. I know what I'm going to do, it's contending with whatever the hell all these other people are going to do that makes things hard.
  Reply With Quote
Old 12-17-2009, 09:42 PM   #7 (permalink)
Moderate your Moderation.
 
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919

Pasta - '96 Volkswagen Passat TDi
90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
Quote:
Originally Posted by shovel View Post
i have to imagine diesels are somewhat differently affected by altitude since their compression ratio is much more critical to combustion
That's why they make chokes.

Design the engine to run efficiently at high alt, and at low alt, it'll probably blow up, so you either set it up to only use a max amount of fuel, which is pig-rich at low alt, and perfect at high alt, or you set it up with a choke, so that it runs as a smaller displacement engine (effective displacement) at low alt, and runs "normally" at high alt.
__________________
"ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"

  Reply With Quote
Old 12-17-2009, 09:44 PM   #8 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,190
Thanks: 179
Thanked 1,522 Times in 1,123 Posts
...uh, guys, two words: turbocharger and wastegate


...turbo's were usually used on ALL high-altitude engines, especially fighters.
  Reply With Quote
Old 12-17-2009, 09:59 PM   #9 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,761

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,585
Thanked 3,548 Times in 2,215 Posts
IIRC the main concern is fuel gelling and emergency air restarts, they see some real cold conditions.
__________________


  Reply With Quote
Old 12-17-2009, 10:41 PM   #10 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location:
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 267 Times in 210 Posts
theres a couple hits for diesel airplane on youtube

(mentions Vulcan Diesel at 3:50 )

__________________
WINDMILLS DO NOT WORK THAT WAY!!!

Last edited by dcb; 12-17-2009 at 10:55 PM..
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel Economy related papers tasdrouille General Efficiency Discussion 41 03-19-2021 06:31 PM
Project: Rebuilding an '01 Honda Insight as a nonhybrid Fabio Hybrids 158 01-12-2013 11:59 AM
Drive Like a Trucker for Great Fuel Economy SVOboy EcoModder Blog Discussion 12 08-18-2009 09:20 PM
Ram air on carb = bad fuel economy? 121madness EcoModding Central 0 08-18-2009 08:50 AM
Basic EcoDriving Techniques and Instrumentation SVOboy Instrumentation 2 11-17-2007 11:38 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com