Usable Fuel
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johnhicks
- Posts: 6
- Joined: Thu Dec 23, 2021 1:35 pm
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Usable Fuel
I just purchased a Cessna 140, it has 12.5 gal. wing tanks, but what is the usable fuel? I was surprised it was not in the Owners Manual.
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maverick_fa
- Posts: 59
- Joined: Tue May 04, 2021 6:02 pm
- Name: Mat
- Location: Montréal
- Aircraft Type: One Forty 100
- Occupation-Interests: Flight Instructor (Aerobatic & ASEL), Avionics, FTI
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Re: Usable Fuel
For takeoff you need 1/4 tank IAW the POH (p.3 Section 1 C (3))
1/4 x 12.5GL x 2 tanks = 6.5 GL
or 18.5 GL of useable fuel
*this is for the normal attitudes (gentle to steep)
Straight climb:
1/8 tank is safe for medium climbing (best rate of climb) = 22 useable fuel
1/16 tank is risky but ok for gentle climbing (normal/cruise climb) = 23.5 useable fuel
Straight & Level:
I was able to empty my RHS tank the other day when I was flying straight & level during a calm day.
I was able to put 12.1 GL in the RHS tank after my flight.
That will be 24.2 GL of usable fuel if you have big balls & you don't really care about your AC/life...
1/4 x 12.5GL x 2 tanks = 6.5 GL
or 18.5 GL of useable fuel
*this is for the normal attitudes (gentle to steep)
Straight climb:
1/8 tank is safe for medium climbing (best rate of climb) = 22 useable fuel
1/16 tank is risky but ok for gentle climbing (normal/cruise climb) = 23.5 useable fuel
Straight & Level:
I was able to empty my RHS tank the other day when I was flying straight & level during a calm day.
I was able to put 12.1 GL in the RHS tank after my flight.
That will be 24.2 GL of usable fuel if you have big balls & you don't really care about your AC/life...
Mat | CSG3