Shawyer's EmDrive


by sanman
Tags: emdrive, shawyer
sanman
sanman is offline
#1
Nov9-12, 06:24 PM
P: 655
Roger Shawyer's EmDrive is claimed to have been validated by a university in China:


http://www.aviationweek.com/Article....p84-495380.xml

http://wulixb.iphy.ac.cn/EN/abstract...act47295.shtml


These claims seem to fly in the face of skeptics who have pointed out that the EmDrive violates the conservation of momentum. What would be the most effective way to de-bunk EmDrive, or definitively prove whether it works or not?
Phys.Org News Partner Physics news on Phys.org
The hemihelix: Scientists discover a new shape using rubber bands (w/ video)
Mapping the road to quantum gravity
Chameleon crystals could enable active camouflage (w/ video)
berkeman
berkeman is offline
#2
Nov9-12, 06:30 PM
Mentor
berkeman's Avatar
P: 39,720
I don't understand what's controversial. Photons carry momentum, don't they? That's how a solar sail works...

Is the controversial part not that they are claiming some net thrust, but that they are claiming too much?

a thrust of 85 millinewtons (mN) with a 300-watt input.
marcus
marcus is offline
#3
Nov9-12, 07:21 PM
Astronomy
Sci Advisor
PF Gold
marcus's Avatar
P: 22,809
Quote Quote by berkeman View Post
I don't understand what's controversial. Photons carry momentum, don't they? That's how a solar sail works...

Is the controversial part not that they are claiming some net thrust, but that they are claiming too much?
300 watts of light represents 1.0007 micronewtons of thrust. As you quote, they claim 85 millinewtons of thrust. Fishy.
Maybe belongs in the debunking forum.

Vanadium 50
Vanadium 50 is offline
#4
Nov10-12, 03:59 AM
Mentor
Vanadium 50's Avatar
P: 15,627

Shawyer's EmDrive


Now we know why Acta Physica Sinica has an impact factor of 0.3.
ZapperZ
ZapperZ is offline
#5
Nov10-12, 05:00 AM
Mentor
ZapperZ's Avatar
P: 28,841
This is also not a BTSM topic.

Zz.


Register to reply

Related Discussions
EMdrive Revisited Aerospace Engineering 1
Progress Report- EMDRIVE, my attempt General Physics 4
Shawyer's EMdrive General Discussion 4
Roger Shawyer and the EmDrive lecture? General Physics 1
Re: Roger Shawyer and the EmDrive lecture? General Physics 0