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AUX tank for RF5B printer friendly version
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sericson
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Location: Lancaster, Ca
Registered: Feb 2007
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Posts: 20

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Posted Monday, August 15, 2016 @ 07:28 PM  

Looking for ideas or maybe current examples of a 5 to 7 gallon aux tank for my RF5B N99809. I have upgraded to the L2000 Limbach and correct Hoffmann prop (Together a great performance improvement). Collin was here the day we hung it! I'm still early in the flight testing (10 hrs) but typically see 100MPH true at 2300 RPM at 4 gph. Climb rate is about double the old POS L17000. Much smoother and oil temps rarely goes past 100 deg C on climb out at low pitch full throttle. Oil temp at cruise is 80 to 90 deg C in the hot (typically over 100 deg F) Mojave desert where I'm based in high pitch 2300-2400 RPM. Gives me about 2.5 hours endurance with zero reserves. 5.5 more gallons would be close to 3.4 hours with decent VFR reserves. 7.4 gallons would yield about 3.8 hours plus VFR reserves.

I'm eyeing the area between the passengers legs to place a small aux tank with a separate fill port and small electric transfer pump. Tank likely to be manufactured from water jet cut 6061 Aluminum and Tig welded. Might be interested in kitting a few but welding and installation would be up to the owner.

Anybody got pictures of something already flying? Somebody must have played with this.

Steve

--------------------
Steve Ericson
N55SE RF-4D former F-BPLI
N99809 RF-5B

Barry Turner
Private

Gender: Male
Location: South AFRICA
Registered: Jan 2018
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Posted Friday, February 2, 2018 @ 10:15 AM  

Quote:
Originally posted by sericson

Looking for ideas or maybe current examples of a 5 to 7 gallon aux tank for my RF5B N99809. I have upgraded to the L2000 Limbach and correct Hoffmann prop (Together a great performance improvement). Collin was here the day we hung it! I'm still early in the flight testing (10 hrs) but typically see 100MPH true at 2300 RPM at 4 gph. Climb rate is about double the old POS L17000. Much smoother and oil temps rarely goes past 100 deg C on climb out at low pitch full throttle. Oil temp at cruise is 80 to 90 deg C in the hot (typically over 100 deg F) Mojave desert where I'm based in high pitch 2300-2400 RPM. Gives me about 2.5 hours endurance with zero reserves. 5.5 more gallons would be close to 3.4 hours with decent VFR reserves. 7.4 gallons would yield about 3.8 hours plus VFR reserves.

I'm eyeing the area between the passengers legs to place a small aux tank with a separate fill port and small electric transfer pump. Tank likely to be manufactured from water jet cut 6061 Aluminum and Tig welded. Might be interested in kitting a few but welding and installation would be up to the owner.

Anybody got pictures of something already flying? Somebody must have played with this.

Steve

Hi Steve sorry have no pictures but I had a 12 liter tank fitted under the rear instrument panel in my RF5B. I had an electric transfer pump in the wing feeding through a non return valve into the fuel tap where the pipe from the tank joined.The procedure was to run a certain time and switch on the transfer pump and watch the main tank re fill. It made it possible for me to run from Johannesburg to Durban without re fueling.That aircraft had a 2180cc engine with original carburetor and fixed prop.

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