saghirmann
New Member
- Joined
- Dec 29, 2010
- Messages
- 11
Has any one experienced waves in the background during engine operations with change in pattern with change in RPM? What are possible causes and remedies?
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
EMI interference or what?
- Thread starter saghirmann
- Start date
- Joined
- Mar 23, 2005
- Messages
- 13,226
Not exactly sure I'm understanding what you're seeing. Can you elaborate?
saghirmann
New Member
- Joined
- Dec 29, 2010
- Messages
- 11
So to elaborate, When the engine is operating at high RPM, say above 2000 for a Lycoming 540, one can notice dim waves travelling across the display especially PFD. May be during daytime it is not very prominent but it is definitely at night time quite prominent.
- Joined
- Mar 23, 2005
- Messages
- 13,226
We've noticed cases of panel vibration interacting with the way the display backlight , which can create the illusion of interference. This is similar to the effect of a TV screen recorded with a video camera - you see lines because the frames that the camera captures aren't exactly timed with the frames that are being recorded. Vibration can create this same effect. Try touching the display itself (lightly) when you see this, or pressing on the bezel or the panel around the display firmly. Does that change the character of the "waves"?