Mailing List flyrotary@lancaironline.net Message #36069
From: Tracy Crook <lors01@msn.com>
Subject: Re: [FlyRotary] The truth??? / Injector flow rate mystery solved
Date: Thu, 8 Mar 2007 18:04:36 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Hi Bill,
The HP reading is useless until the fuel flow has been accurately calibrated and the mixture monitor is operating properly.  Calibrating the fuel flow is sometimes no small task.  I could have made it easy by using an external fuel flow sensor (the Lycoming version of the EM2 uses one) but that adds over $250 to the cost.
 
Have not written up the details yet but have discovered a big reason why the Mazda injectors appear to flow much more that the numbers on them would explain when used with the EC2 engine controllers.  Steve Boese was very helpful in identifying this anomaly.  It's been driving Ed Anderson and me nuts for some time.
 
I'm testing a simple mod right now which makes the injectors flow much closer to what they should.  It also makes it easier to get a smoother engine idle at a lower rpm.  More after testing is complete.
 
Tracy
----- Original Message -----
Sent: Thursday, March 08, 2007 10:37 AM
Subject: [FlyRotary] The truth????

"Doesn't have to be long, doesn't have to be prose, doesn't even have to
be the truth - just write and make some outlandish claim - like 250Hp at
4200 rpm {:>) or the unbelievable efficiency of pinched ducts - that'll
get some attention."

Hey! I didn't build the instrument...I just read the numbers off of it!
  Heck! I don't even know how it works well enough to understand why it
reads so high!!??  :>)

And I still think it looks good! :>)

Bill B

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