More EagleTree Data for CarbSmart

[LJS]

Hi All,

Well, the weather finally broke here, and I got to put my CarbSmart to the test. I've got to tell you that I am VERY HAPPY with the setup. The engine sounds the same from the start of the tank until the end. And power is excellent throughout the flight.

I may try a hotter temperature next time as it still seems a hair rich. But the CarbSmart coupled with the Align governor is a nice combination. I'm running 2100 rpm.

I'm getting 8 minute flights with about 1.5 minutes left in the tank when I quit. The flights shown below are mild 3D. The engine could take anything I could throw at it. It never sounded lean or starved for fuel.:thumbup:

I had had trouble with this engine running rich at the start of the tank and very lean at of the tank the end last year. CarbSmart has really taken care of that problem.

Just so you know what you're looking at, the graph is of four flights at 52 degrees F ambient. I turned up the gain from 60 to 70% after flight one. You'll notice that the oscillations are a bit tighter for flights 2, 3, and 4. I have CarbSmart set to 110 C, but it's actually running at 100 C (212 F). No biggie...

Keep 'em flying.:YeaBaby:
LJS

[miami6]

thanks for sharing your data

[helibalou]

Very cool....

I hear nothing but good things about the carbsmart.

[oldskool]

Nice results. I'm thinking of going carb smart too. Couple of things bother me, though. From the ossicaltions (sp?) in temp, I suppose that the needle is constantly being adjusted. Is the carb needle designed for constant usage like that, or will that cause increased wear and tear on the carb?

Secondly, what happens if the sensor fails/breaks -- will the CS keep leaning out the mixture until the engine dies?

It looks like it takes 3 min for the engine to come up to temp. In that time is the carb leaned to the extreme to try to compensate? I know there are ranges set by the CS, but messing with the carb before the 3 min seems dangerous...

I just don't know enough about it.

[TheBum]

You don't have significant wear without at least moderate friction and friction generates heat. So, by the time the friction gets great enough to be of concern, the temperature will also be high enough for the CarbSmart to act upon and richen the mixture.

The CarbSmart has a failsafe that will take the needle back to the reference position if the sensor fails, which is why you want to make sure the reference position is not too lean.