Go Back   EcoModder Forum > EcoModding > Aerodynamics
Register Now
 Register Now

Reply  Post New Thread
Submit Tools LinkBack Thread Tools
Old 10-12-2017, 10:51 AM   #1 (permalink)
Grand Imperial Poobah
Shepherd777's Avatar
Join Date: Aug 2011
Location: Newington, CT USA
Posts: 239
Thanks: 30
Thanked 470 Times in 137 Posts
Virgin Hyperloop One

Does anyone care to elaborate about the rear of the pod profile regarding trailing edge aerodynamics?

Do they gain all of that ultra-low aerodynamic drag due mostly to the low pressure inside of the tube?

Their web site says: "With Virgin Hyperloop One, passengers and cargo will be loaded into a pod, and accelerate gradually via electric propulsion through a low-pressure tube. The pod quickly lifts above the track using magnetic levitation and glides at airline speeds for long distances due to ultra-low aerodynamic drag."


Bob Sliwa
"Like a Midget at a Urinal, I knew I was gonna have to stay on my toes......."

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

Old 10-12-2017, 11:42 AM   #2 (permalink)
Master EcoModder
kach22i's Avatar
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 2,676
Thanks: 3
Thanked 1,665 Times in 1,172 Posts
Most of these schemes are base on a vacuum in the tube because the air displaced would have to go somewhere as the capsule passes, so you want as little as air in there as possible - what air is in there is going to get squeezed and that takes energy.

The more air, the more energy because of air resistance.

Conclusion, the tail isn't treated with a cone or tail because there is so little air in the tube to begin with.

That's my guess anyway.

I sure would feel better about my opinion if I saw some CFD images video and gifs on it.

EDIT: I did find this................Musk's Pod, a different shape than Virgin's.


The first issue we found in the virtual prototype was with airflow. The pod shape that Musk shows in his white paper will cause some of the air around the vehicle to become supersonic, which could lead to a completely different class of engineering problem and make hyperloop infeasible. With some adjustments – increasing the taper of the front and back ends of the pod, the airflow would be subsonic and wouldn’t choke as it moves past the vehicle.
EDIT-2: Found more, plus this link has a video.


Architect, Artist and Designer of Objects

1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft

Chin Spoiler:

Rear Spoiler Pick Up Truck

Roof Wing

Last edited by kach22i; 10-12-2017 at 11:50 AM..
  Reply With Quote
The Following User Says Thank You to kach22i For This Useful Post:
aerohead (10-14-2017)
Old 10-12-2017, 11:51 AM   #3 (permalink)
Master EcoModder
JockoT's Avatar
Join Date: Jun 2017
Location: Scotland
Posts: 654

All That Jazz - '06 Honda Jazz i-DSI S
Team Honda
90 day: 48.72 mpg (US)
Thanks: 36
Thanked 126 Times in 94 Posts
The Hyperloop runs in a partial vacuum so you could pretty much get good aerodynamics from a brick.
I specialised in High Vacuum from the 1970's to the 90's, and once you get to low pressures, there is virtually nothing in the tube. Air resistance is virtually nothing. Mind you, even satellites, in orbit, are subject to aerodynamic drag. Just not a lot.

People Think They Are Thinking When They Are Merely Rearranging Their Prejudices

  Reply With Quote
The Following 2 Users Say Thank You to JockoT For This Useful Post:
aerohead (10-14-2017), Daox (10-12-2017)
Reply  Post New Thread

Thread Tools

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com