Generic EM Drive Information

From EM Drive
Revision as of 12:01, 14 May 2015 by MazonDel (talk | contribs) (Adding a page concerning Generic EM Drive Information.)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

This is a location for assorted information concerning EM Drives. Likely applies to all current experimental efforts.

Velocity

At constant input power, the thrust, and therefore the acceleration, must decrease with time, to ensure that the spacecraft's (change in) velocity never exceeds 2*Power/Thrust.[1] Effectively, White proposes that the maximum velocity possibly achievable for these EM Drives is 2*PowerInput/ThrustForce. This energy constraint is known even from Sutton's textbook on Elements of Rocket Propulsion (equation 19-1 Rocket propulsion elements 7th edition- Sutton).


The higher the ThrustForce/InputPower, the lower the maximum velocity of an EM Drive: MAXIMUM VELOCITY OF EM DRIVE = 2 /(thrustForce/PowerInput)

  1. (Brady TE mode) ThrustForce/power: 0.00002131 Newton/Watt --> MaximumVelocity = 2/0.00002131 m/s = 93853 m/s = 93.85 km/s
  2. (Prof. Juan Yang et.al. China) ThrustForce/power: 0.000290 Newton/Watt --> MaximumVelocity = 2/0.000290 m/s = 6897 m/s = 6.90 km/s
  3. (Cannae Superconducting) ThrustForce/power: 0.0009524 Newton/Watt --> MaximumVelocity = 2/0.0009524 m/s = 2100 m/s = 2.10 km/s


References

  1. ↑ Rodal's post concerning the energy/thrust constraint.
Retrieved from "http://emdrive.echothis.com/index.php?title=Generic_EM_Drive_Information&oldid=125"