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Steve, there is no need to exceed 5 mins at "full tilt", in fact you only need to be there for 15-20 seconds as it is only one data point. If you want extended ground operations in general then YES, you will need some kind of intervention. I would recommend a garden hose (attached somehow) spraying directly onto your radiator cores.
Tune the EC2 for fuel flow - manuals says at 24" MP; take it to WOT and tune that data point or fuel bin. The values required between 24" and 30" MP should be a smooth gradually increasing slope and the easiest portion of the EC2 MAP to work with and the most consistent results between ground tuning and actual flight characteristics. Tuning around the Staging Point and down to idle is much more difficult and will require in-flight monitoring and or adjustments ... Jeff
From: steve Izett <flyrotary@lancaironline.net>
Subject: Tuning EC2
Date: Tue, 2 Feb 2016 20:33:27 +0800
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Hi Guys
We are trying to tune our engine in OAT of approaching 100F and only have about 5 mins or so at full tilt before temps get to red line.
For you guys in hotter climates how did you keep your engine cool long enough to do some tuning?
We are thinking about trying to spraying gobs of water into the radiator/s to suck some heat out of the system.
Any one got experiences of doing this?
I'm just getting familiar with the EC2 and wondering how long it took some of you to get the tuning right.
I'm hoping one of the closed loop modes will greatly reduce the exercise once Ive got it somewhere close.
Feedback much appreciated
Steve Izett
Renesis RD1C EC2 EM3
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