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 MM 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 MM 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



Hi Paul,

I had your preliminary work which you published on your website about cooling.
So I'd basically designed our cooling system based on this work of yours
and modelling of Tracy’s RV8 by the time you published your complete book.
So I didn’t end up getting your book.
As far as our progress, we’ve been fluffing around with balancing our prop for the last few months.
Hoping to commence fun power tuning over the next few weeks.

Here are the two charts for Rotors 1 & 2. (R1 on top)
Steve Izett

Thanks for all the work you did on this project Steve.
The charts are beautiful. The TTC engine is in PERFECT shape.
I can't wait until we get the new turbo which is on the way.

Maybe Simon Wagner can talk Motec into doing a compression
check sensor. The Motec  computer is quite capable of doing
this.

In fact if one had a fast enough sensor one could take
the upper plug out and do it while the engine was running
on the lower plug.

Paul Lamar



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