Today's Message Index:
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1. 02:03 AM - Re: Re: Connecting both sides of the fuel tank (Kevin Challis)
2. 04:24 AM - Re: Connecting both sides of the fuel tank (Remi Guerner)
3. 10:17 AM - Re: Re: Connecting both sides of the fuel tank (timward)
Message 1
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| Subject: | Re: Connecting both sides of the fuel tank |
It=99s called the reserve for a reason. Why would you take fuel from t
he side that is not getting the return fuel. You should never get to that st
age but I want to know I have used every drop if it all goes wrong.
Kevin Challis
> On 2 Nov 2020, at 18:38, timward <ward.t@xtra.co.nz> wrote:
>
> =EF=BBHi John,
> The return fuel to the reserve tank is a very small amount due to the rest
rictor placed in the return line pipe from the T intersection. Most excess f
uel now flows out through an overflow tube from the new Rotax engine mechani
cal fuel pump. I would prefer to make sure the reserve fuel filter is not bl
ocked and the flow to the engine is uninhabited by selecting the Reserve fir
st for 30 mins then back to the Main for the last 30mins, a conservative app
roach.
> Cheers,
> Tim
>
> Sent from my iPad
> Tim Ward
> 12 Waiwetu Street,
> Fendalton,
> Christchurch,
> 8052
> New Zealand
> ward.t@xtra.co.nz
> 021 0640221
>
>>> On 2/11/2020, at 9:27 PM, John Wighton <john@wighton.net> wrote:
>>>
net>
>>
>> Reply to Tim.
>>
>> The return line goes to the reserve side, therefore the last tank you swi
tch to should always be the reserve. As this will receive the excess fuel th
at is bypassing the carb.
>>
>> So when your tank/gauge says empty stay on main tank. As soon as the eng
ine faulters switch to reserve, you then have 9 lites remaining. Every drop o
f that is available to you, including the returned fuel.
>>
>> Regards
>> JW
>>
>> --------
>> John Wighton
>> Europa XS trigear G-IPOD
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=499180#499180
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
Message 2
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| Subject: | Re: Connecting both sides of the fuel tank |
>>
I agree with John that it is the best practice. The returned fuel is very significant.
It is about 12 liters per hour at cruise power with the standard Europa
fuel system (Rotax 912, all carburetted versions). Then if you empty the reserve
side first, the 9 or so liters remaining on the main side will not all go
to the engine. Suppose your engine is using 15 liters/hour at your selected cruise
power, the fuel flow from the tank will be 27 L/h and the main side will
be empty after 20 minutes. 4 liters will go to the reserve side and stay there...
unless you switch tanks once again. Better empty the main first and get 36
minutes of powered flight after switching to reserve. With the 914, the average
return flow is dramatically higher, making the problem worse.
Remi Guerner
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=499214#499214
Message 3
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| Subject: | Re: Connecting both sides of the fuel tank |
Hi All,
Wow. I didn=99t realise the return fuel was that significant. My apolo
gies, I shall return to the recognised method in the future, Main Tank then R
eserve.
Cheers,
Tim
Sent from my iPad
Tim Ward
12 Waiwetu Street,
Fendalton,
Christchurch,
8052
New Zealand
ward.t@xtra.co.nz
021 0640221
> On 4/11/2020, at 1:32 AM, Remi Guerner <air.guerner@orange.fr> wrote:
>
ange.fr>
>
>>>
>
> I agree with John that it is the best practice. The returned fuel is very s
ignificant. It is about 12 liters per hour at cruise power with the standard
Europa fuel system (Rotax 912, all carburetted versions). Then if you empty
the reserve side first, the 9 or so liters remaining on the main side will n
ot all go to the engine. Suppose your engine is using 15 liters/hour at your
selected cruise power, the fuel flow from the tank will be 27 L/h and the m
ain side will be empty after 20 minutes. 4 liters will go to the reserve sid
e and stay there... unless you switch tanks once again. Better empty the mai
n first and get 36 minutes of powered flight after switching to reserve. Wit
h the 914, the average return flow is dramatically higher, making the proble
m worse.
> Remi Guerner
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=499214#499214
>
>
>
>
>
>
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