|Type||External tip tank|
|Added fuel total||28 gallons (14 per tank/side)|
|Useable fuel total||27 gallons (13.5 per tank/side)|
|Net added span||36 inches|
|Gross weight increase||N/A|
|Dry weight||35 lbs|
|Installation time||50-60 hours (with previous installation experience)|
|Need to be painted||Yes|
|STC and models covered||
|Flight manual supplement (unnecessary if not listed)||None|
|Limits||SA2676WE: When aircraft gross weight is above 3510 pounds, a minimum of 7.5 gallons of fuel must be in each tip tank.|
We’ve been selling these extended tip tanks since 1972. They carry 28 gallons total, 27 gallons usable. They are fiberglass tanks that bolt onto the end of the wing and replace the factory tip. The overall span is increased by 36 inches which results in a better climb and above 10,000 feet, we usually get reports of an additional 3 or 4 kts in cruise speed. The tank has it’s own filler cap and quick drain valve. We ship the tanks in gray primer so they must be painted to match the wing.
For tank installation the close-out rib is removed and if you have strobes, the transformer is re-located to the inboard side of the rib. New holes are drilled in the wing skin and our tank/tip is bolted in place.
The next step is to run the fuel line inboard to the part of the wing where the strut attaches. The transfer pump is mounted here along with two check valves. The fuel line is then run inboard to the main tank. For rubber cell mains, the fuel enters through a tee fitting in the windshield post into the fuel line that runs from the mains down to the engine. For metal main tanks, a bulk head fitting is installed in the side or top of the main tank.
Gauge(s) and lighted rocker switches are then mounted on the panel, pedestal or over the doors. Apply the placards, fill out the 337 and you’re finished.
The kit is quite complete including tanks, caps, mounting and plumbing hardware, transfer pumps, check valves, fuel line, wire, switches, gauges, fuses, installation drawings and STC. You supply some PRC sealant if your main tanks are metal or a wet wing.
Local installers complete the job in 50-60 hours but if you have someone do it that has never done one before it will probably take longer. It’s not an exotic installation but, done right, it takes a little time. The installation time does not include the time to paint.