Thanks Ed.  That's what I wanted to hear. 

Mark


At 02:57 PM 7/27/2004 -0400, you wrote:

I would be very surprised if the EC2 is not within +- a couple of RPM.  I have just completed the RPM function in my digital fuel monitoring system and it will read to within +-1 RPM of the actually rpm.  There is no question that the readout from the EC2 would be many times more accurate than any eyeball tach gauge (or even a great ear {:>))
 
That's not to say there is no possibly of error - while digital is quite capable of that kind of accuracy  - in reality it is no better than the computer computational algorithms that the programmer installed {:>) (and coded).  .
 
Ed
 
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC

----- Original Message -----

From: Mark Steitle

To: Rotary motors in aircraft

Sent: Tuesday, July 27, 2004 2:15 PM

Subject: [FlyRotary] Re: EM-2 Accuracy of RPM

That's my thought too, but it does feel like it could be a little high (using my highly-trained tuned-ear) for the readout.  What sounds like a nice rump, rump, rump, is usually indicating between 1200-1500 rpm.  Its probably just be the unique "rotary sound" vs. the typical American V-8 sound.  Also, the 3-rotor has a different sound than the 2-rotor.  I'll guess I need to address this to Tracy.  Isn't Tracy at OSH this week?  

Mark S.

At 12:51 PM 7/27/2004 -0500, you wrote:

Has anyone actually verified the rpm readings from the

EM-2?  I have no particular reason to question it, but it would be good to

know that the EM-2 readings are accurate within some factor.

Mark S.

Hi Mark,

I'm assuming that you also have an EC-2.  If that's the case, I'm pretty sure the EM-2 is getting it's RPM data from the EC-2.  If the EC-2 doesn't know the exact RPM of the engine, we're all in trouble :-)  

Seriously, I never questioned it for a second, but you can call Tracy and see if there's any way it could be wrong. 

Cheers,

Rusty