Mike Brown's Mayday

[wyhdah]

Re: Mike Brown's Mayday

Micheal,

Don't worry about threadjacking since you are the only one answering this tread feel free to take it where you like.

PS thanks for the screen caps. That really shows what we are talking about. NICE.

[wyhdah]

Re: Mike Brown's Mayday

That second shot must be a ground run up. Do you typically see Oil temps that high on run ups?

[Mluvara]

Re: Mike Brown's Mayday

That second shot must be a ground run up. Do you typically see Oil temps that high on run ups?

"The data shown on each screen may not be real values."

Some of the screen shots are from simulations and testing... You think I would publish real numbers?

Michael

[wyhdah]

Re: Mike Brown's Mayday

"The data shown on each screen may not be real values."

Some of the screen shots are from simulations and testing... You think I would publish real numbers?

Michael

Hey you said it was from 232 2006 not me.

[jarrodeu]

Re: Mike Brown's Mayday

How often does it refresh? Is it a constant feed like a video or is it like a picture that keeps refreshing?

Jarrod

[W J Pearce]

Re: Mike Brown's Mayday

Mike's system is the most sophisticated in the unlimiteds that I've built. It measures 30 or so items, from non-critical items (speed, position, g force, etc) to engine rpm, temperatures, pressures, boiler status, etc. We're not doing individual EGT's however, nor have we gotten into A/F ratios.. Part of the issue with the real time telemetry is being able disseminate what data is important and act on what it is telling you. A lot of time has been spent on the display portion so that the user can be focused on the parameters of importance. This has come down to a handful of critical items.

Michael

Hey Michael,

Thirty parameters are real time telemetry being sent back "home". Are you recording other parameters for download after the fact?

[Mluvara]

Re: Mike Brown's Mayday

Hey you said it was from 232 2006 not me.

The one on the right with the high oil temp is not 232's screen. 232 is on the left.

How often does it refresh? Is it a constant feed like a video or is it like a picture that keeps refreshing?

The data is typically sent approximately 2-3 times a second and the gauges update accordingly, so it's not a video feed. Typically, data is at near 100% throughput except when the racers go behind peavine before the start of the race.

Michael

[Mluvara]

Re: Mike Brown's Mayday

Hey Michael,

Thirty parameters are real time telemetry being sent back "home". Are you recording other parameters for download after the fact?

All the data being sent over the RF link is also recorded onboard to an SD card, so what goes over the air is also recorded. It's just the 30 or so parameters.

I know, it's not the 100+ channels like you guys had on blue thunder....

Michael

[W J Pearce]

Re: Mike Brown's Mayday

I know, it's not the 100+ channels like you guys had on blue thunder....

Michael

Did not mean it like that. I was just curious. I know you thought nothing of it but I just want to make it clear to everyone else. But EGTs and other items (fuel injector cycles) were part of the download. Don't remember if it was part of the telemetry. I know you and Fred had many conversations and I'm sure you know more about the BT system than I do. It is neat stuff.

I hate the past tense!

[wyhdah]

Re: Mike Brown's Mayday

Bill, I did notice last year on BT the data you guys were gathering looked alot like our Race car systems as did the Engine Control method. BT did have individual EGTs and I am sure the ECU would log all the injection parameters as well as the the pressures. I know the ECU we use will monitor turbo RPM, waste gate pulse width, several things we don't use and probably driver heart rate if I could rig up a sensor.

Edit: sorry about the past tense thing.

[W J Pearce]

Re: Mike Brown's Mayday

Bill, I did notice last year on BT the data you guys were gathering looked alot like our Race car systems as did the Engine Control method. BT did have individual EGTs and I am sure the ECU would log all the injection parameters as well as the the pressures. I know the ECU we use will monitor turbo RPM, waste gate pulse width, several things we don't use and probably driver heart rate if I could rig up a sensor.

Edit: sorry about the past tense thing.

A lot of it was auto technology. We had (damn it!) two Motec FADEC and just about everything was hooked up to a data channel. I think we had 140 some channels being recorded. But it was a very custom system that had a time consuming set-up. Like I said Michael probably knows more about it than I do. The brilliance of RCATS is its ease of install/customization.

Regardless of the system, it is really an advantage so see just what is going on before and after a "problem". Even without a problem it provides a lot of data to figure out just what is going on. And beyond just the engine stuff, a cut pylon is rather obvious if you have GPS plotting. Binky took that to a new level with GoogleMaps. I'd say the best thing is allowing the pilot to keep his/her eyes out on the course rather then wondering what his oil pressure is.

[Dash]

Re: Mike Brown's Mayday

Can't remember what magazine it was, but a while back they did a "Top 30" (?) greatest aviation advancements of the past 25 years or so. If we did that for air racing I think that we'd have some cool discussions. I'd definitely say that onboard telemetry is one of those things. Now we have the opportunity to learn from a blown engine and maybe one day the collaboration between engine builders and teams will allow for longer life on racing engines.