On 8 Feb 2016, at 11:48 AM, Charlie England <flyrotary@lancaironline.net> wrote:

I'd love to hear more about the prop. Google couldn't seem to help me when I searched for it; is there a web site showing the specs?

Charlie


On 2/7/2016 5:42 PM, Stephen Izett wrote:

Hi Bobby

At this stage the prop is not constant speed, just adjustable.

So I could do I similar thing. Choose an Rpm.

Why was the 2100 RPM at the prop chosen? Did you determine this to provide 

Our EM3 RPM reading issue appears to be related to inj #1 signal as the reading goes intermittent and low (from memory ~ 800 RPM) and the Skyview suffering the same.

Steve

On 8 Feb 2016, at 3:14 AM, Bobby J. Hughes <flyrotary@lancaironline.net> wrote:

Steve,

Does your prop have a constant speed controller or is it strictly manual operated? One or possibly two folks flying MT electric constant speed controllers have reported an rpm difference between the selected prop rpm and the actual engine rpm. Mine is very close.

 

Has anyone else had the EM3 read rpm incorrectly at high RPM?- My EM3 screen sometimes shows the correct rpm and then NOP and alternates every second or so. Reducing rpm seems to correct the issue. I suspect it’s noise on the serial circuit. I plan to replace the serial wiring with shield wire next time I have the panel out. My AFS EM show correct rpm at all times and it reads the same injector pulse. 

 

One other thought regarding tuning for 7500 rpm. Initially I had a lot of trouble tuning with the constant speed electric prop. Tracy recommend I run up full power,  adjust the prop for 2100 rpm, lock it in manual mode and tune at this condition. This made tuning easier since I wasn’t chasing the changing prop loads. If your prop controller is manual only then you may not encounter the same difficulties. 

 

 

Bobby

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] 
Sent: Sunday, February 07, 2016 9:58 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Testing

 

Hi Bobby

It's an Electric  3 blade Aerotek from New Zealand.

Steve

 

 

 

 

On 7 Feb 2016, at 10:31 PM, Bobby J. Hughes <flyrotary@lancaironline.net> wrote:

 

Steve,

 

What prop do you have? 

 

Bobby

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] 
Sent: Saturday, February 06, 2016 4:14 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Testing

 

Hi Guys

 

In order to extend ground testing and tuning of the engine in 35+C (95+F) I rigged some water spray onto the water exchanger.

Water temps now stay below 150F even at high load, and to my surprise Oil temps stayed below 180F (I thought I might have to spray water on the Oil Exchanger but not required)

 

I reduced the pitch of the prop to allow a static rpm of approaching 7500rpm and without much missing she spun up OK.

I feel like Im starting to get familiar with the EC2 now and between MODE 2 and 3 and just manual mixture adjustments she runs from idle to 7+K alright.

 

One observation is that at around 6-7K RPM both the Dynon Skyview as well as the EM3 fail to read the RPM correctly.

Now they are both taking their sensing from Injector 1. 

The EC2 of course gets its trigger signal from the Renesis CAS’s (main and backup) and there is a mod on the back of the EC2 board that I took was conditioning of the CAS signals.

Has anyone else had the EM3 read rpm incorrectly at high RPM?

 

After balancing our prop, I’m hoping to begin playing with the EC2’s closed loop mode, and then Timing with new BR10EIX plugs.

 

Thanks again Tracy for your gearbox and EC.

 

Cheers

Steve Izett