Angle for fuel flow test?

[mike.smith]

I want to do a fuel flow test with my AeroVee. Does anyone know a good maximum angle to test at? It would be max climb angle. I have a digital level so I can tip up to a set angle.

Thanks,
Mike Smith

[Fastcapy]

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[Heywoody]

I have not seen anywhere the required fuel flow for the AeroVee..... in other words, after you did your fuel flow test in the various attitudes and obtained your gal/min numbers, what did you use to compare them with to determine that they were adequate or correct ?

[Rynoth]

Per the aerocarb manual, "The fuel system must be able to deliver 1.5 times the engine's required fuel flow at full throttle." So the question becomes, what is the aerovee fuel flow at full throttle?

[radfordc]

According to Jeff Shultz the Aerovee uses 5.7 gal/hr at full power at sea level.

http://www.sonex604.com/percent_power.html

[Fastcapy]

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[mike.smith]

I want to do a fuel flow test with my AeroVee. Does anyone know a good maximum angle to test at? It would be max climb angle. I have a digital level so I can tip up to a set angle.

Thanks,
Mike Smith

I was most interested to hear what angle of climb others had used for testing the flow. This will be an engine-off flow test. Mike Beck's 0, 10, 25 deg trials sound like a good spread. Wondering if anyone used anything more extreme. I have no idea what the max climb angle of a Sonex with and AeroVee might be.

Mike

[Fastcapy]

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[mike.smith]

I came up with those numbers talking with other builders and the FAA inspector who did my inspection. (note you don't need fuel flow data for your airworthiness inspection)

I actually ended up with a tad under 24deg nose up, and that was more steep than I imagined it would be as seen in the pic below.

My dad decided to stop by just as I was about to start doing my tests. I am glad he did because I put him to work holding the fuel can while I ran the stop watch and snapped pics.

25 deg looks like a good angle to use for the top end, thanks.

Mike