REFLECTOR: Franklin Oil Bypass Results

[John Dibble via Reflector]

Brian,

What bypass pressure are you operating at?

Thanks,

John

On 3/21/2015 7:55 PM, Brian Michalk via Reflector wrote:
> Good news!
>
> I am so excited about the results today.  I mounted the new bypass 
> assembly, and set the bypass pressure by first pulling the prop 
> through by hand, then with the starter, then running the engine. I 
> still have it set too high, and will fix that before the next run.
>
> Unfortunately, I did not turn on the Autronic which logs oil 
> temperature, but I do have pressure and flow data.
> FYI, the left axis is logarithmic.
>
> I am very pleased with these results.  I ran the engine on the ground 
> until the CHT's got to redline, and you can see that as the oil warmed 
> up, the more it flowed.  At the end, we ran close to 2000 RPM, and got 
> the oil flow up to six gallons per minute, which is now on the 
> performance specification charts for our oil cooler.  This is 
> definitely a success.
> I'll probably machine one more unit to remove the last final problems 
> I've found, but they are not critical.  I can certainly fly with this 
> unit, and hope to get some flight time in a week or two after I 
> complete my annual.
>
>
>
> Here is a flight from last week.  This is the fourth vortex generator 
> flight with the engine hot.  The oil flow never got up to 3 gallons 
> per minute.
>
>
>
>
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