Thermal Effects - Drive
From EM Drive
One common theorized source of the anomalous thrust is that thermal effects endemic to the structure or components of the activated drive may alter the center of mass or otherwise influence the thrust reading.
Above image from RotoSequence's post concerning the thermister data from the PZT Mach Effect Thruster. 
A quick summary of the current arguments for this interpretation compared with the evidence and arguments against it.
- Example For
- Second Ex
- The thrust response is instantaneous while the thermal response is not.
- Any thermal response is too small in magnitude.