Hi Steve,

 This is rotor 2. Please process with your spread sheet program.

 With the latest program it starts recording the instant the prop
 moves. It stops after exactly one minute. This keeps the file size
 down. I also edited (deleted) the last half as I only ran the starter
 for about 30 seconds or less.

 Paul Lamar

 Hi Paul I noticed the 8 readings called by the interrupt routine are
 all very different now. eg. 0.861523, 0.902881, 0.946387, 0.995801,
 1.04736, 1.09141, 1.13545, 1.18916, Previously it looked like the
 sample rate was faster. If I average them we will loose a great deal
 of resolution. If I chart each reading the waveform is distorted as
 the time between the 8 A2D readings and between the sets of 8
 readings is different.

 Confused Steve


 I am not sure what it was doing when we had it set to 1msec.

 I think it takes at least 4 msec to write to the file and the
 display on the screen per sample. 8 samples 32 msec.

 I will rerun both rotors recording only on the SD card and see if
 that helps. I'll  just run it wide open and what ever time it takes
 that will be the interval. No software interrupt.

 I  will try to run it for one minute.

 This is the program that I will use. Flat out.

 Can you handle one big long comma delimited file?

 Paul Lamar

 OK Steve I went over there and did it right away. It took data for
 one minute flat out. No print screen. 60,000 samples.

 Here it is.

 Paul Lamar


Hi there Paul
Here is the chart of the first few thousand data points
Looks good and consistent between chambers.

Steve

Nothing could be finer. That rear rotor is in perfect condition. That engine did
not damage the turbo. What a relief.

I'll rerun the front rotor with this software. Screen I/O is notorious for taking
a lot of time. That is why you need two Maximite's. One for the EFI and
another for the EFIS. Both Maximite's can be wired to the same sensor.

The Maximite is great. Mark Steitle and I were working on an auto land
system with two ultrasonic distance sensors mounted on the landing
gear of his 3 Rotor  rotary powered Lancair ES. (Now for sale!)
Just a matter of getting your PID right :-)

Thanks a bunch Steve. Do you have my book "How to Cool your Wankel"?

Paul Lamar


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