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petervs(at)knology.net
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 Posted: Tue Jun 17, 2008 12:16 pm Post subject: Best Fuel Economy Settings |
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A few people on this list have been talking about installing Fuel Flow measuring equipment in their planes. I’ve also noted that these systems can be integrated with a GPS so you could get best miles over ground per gallon information.
Then, the compelling question is, at what prop and manifold settings are we seeing the best mpg?
Squatch
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dsavarese0812(at)bellsout
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| Posted: Tue Jun 17, 2008 4:15 pm Post subject: Best Fuel Economy Settings |
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Peter,
You should first have your manifold pressure instrument calibrated by an avionics shop. It's very easy to adjust by removing the screw at the back of the instrument. Regardless of what I or anyone else says is the so called "best" power setting to achieve the best MPG, it will depend on barometric pressure, altitude and wind speed and how well your carburetor is "tuned".
In other words, it will vary greatly depending on conditions. The fuel flow instrument when coupled to the GPS, including a handheld, will display the MPG which you can then play with the prop and manifold pressure. Simply saying, "set the prop at X and set the manifold pressure at Y" is not going to work very well because of the variables previously mentioned.
From my perspective, it's the best $500 I've spent on the airplane because it does allow me to save fuel. And at $5+ per gallon, it doesn't take long to pay for itself.
Dennis
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wise(at)txc.net.au
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| Posted: Tue Jun 17, 2008 7:15 pm Post subject: Best Fuel Economy Settings |
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G'Day Dennis,
What fuel flow meter di you install.
I recently sold a aircraft in which I had installed a FS 450.
too complicated to use. Shadin is much easier.
Now have a 18T on the water to Australia and hence interested in the instrument that you used.
Cheers and regards,
Chrs.
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dsavarese0812(at)bellsout
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| Posted: Wed Jun 18, 2008 3:34 am Post subject: Best Fuel Economy Settings |
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It was an FS450. The manual for the FS450 is the part that's complicated. Most folks agree the manual was poorly written. Once you get it set though, I find it quite simple to use. Maybe that's because I have a Yak 52 and always fill up at the fuel pump. Simply press the AUTO button after the initial test cycle and the fuel quantity is reset to full fuel.
Dennis
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cpayne(at)joimail.com
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| Posted: Wed Jun 18, 2008 4:59 am Post subject: Best Fuel Economy Settings |
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While my FS450 fuel flow gauge was useful, it was even better when I coupled it to my GPS. The MPG readout helps sort out variables such as winds and altitudes while calculating fuel to waypoint, fuel remaining, based on actual usage per distance flown.
Craig Payne
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aviatre(at)aol.com
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| Posted: Wed Jun 18, 2008 7:14 am Post subject: Best Fuel Economy Settings |
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Speaking of fuel economy, does anyone have any suggestions as to egt settings for the cj6?
Frank Surfas
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scott.glaser(at)thedefian
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| Posted: Wed Jun 18, 2008 2:13 pm Post subject: Best Fuel Economy Settings |
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I went the less expensive route and got the Fuel Mizer from aircraft spruce. It doesn't have a GPS interface but if you're pinching pennies it does the trick.
Scott
N8252
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