582 rising EGT temps
in 2 Stroke Technical Questions
10 years ago
I used to fly professionally for a coporation. We always recorded engine readings on each day the aircraft flew.
Now I am retired from professional flying and have owned and flown a Quicksilver Sport 2S for the last year. I have been told that taking engine readings on a 2-stroke engine is a bit of an overkill but guess what....
I just used a database application to input and graph the data from last year's flying (2013). I am attaching a PowerPoint presentation with 2 slides; one with 3 graphs on it...the water, EGT and CHT readings; the second with just the EGT graph.
The EGT graph is the one that appears the most alarming. While I did not notice the change during the year, graphing it out certainly made it obvious!
All 3 graphs show an increase on 7/16, followed by a reversal of sorts on 7/21. But from the point forward, the EGTs continually rise.
My questions:
1 - would the altitude at which I took the readings affect the numbers? I did look at the altitudes for each reading but did not notice any trends. Should
a change in altitude cause a corresponding change in the engine readings on a 2-stroke engine?
2 - does the tachometer setting affect the reading? At a given altitude, a change in RPM should result in what kind of changes on the three graphs?
I will go back into my engine log and see if I recorded anything around July 16-21. Please take a look at the slide and offer your opinions.
Now I am retired from professional flying and have owned and flown a Quicksilver Sport 2S for the last year. I have been told that taking engine readings on a 2-stroke engine is a bit of an overkill but guess what....
I just used a database application to input and graph the data from last year's flying (2013). I am attaching a PowerPoint presentation with 2 slides; one with 3 graphs on it...the water, EGT and CHT readings; the second with just the EGT graph.
The EGT graph is the one that appears the most alarming. While I did not notice the change during the year, graphing it out certainly made it obvious!
All 3 graphs show an increase on 7/16, followed by a reversal of sorts on 7/21. But from the point forward, the EGTs continually rise.
My questions:
1 - would the altitude at which I took the readings affect the numbers? I did look at the altitudes for each reading but did not notice any trends. Should
a change in altitude cause a corresponding change in the engine readings on a 2-stroke engine?
2 - does the tachometer setting affect the reading? At a given altitude, a change in RPM should result in what kind of changes on the three graphs?
I will go back into my engine log and see if I recorded anything around July 16-21. Please take a look at the slide and offer your opinions.
