Tettra Bubbless tank has been the standard fuel supply for many
years. The Formula One racers started using them in the early 90's.
From there they went to Quickies and then to Q40. Bubbless tanks
are found in most all of the racing airplanes today.
Bubbless tanks have the advantage of supplying a constant fuel supply
to a racing engine with no chance of an air bubble or fuel foaming.
The tank has a hard outer shell that is rigid. Inside of that is
a latex bladder that collapses as the fuel is used from the tank.
The pressure is between the hard outer shell and the soft bladder.
The Tettra tank in the picture is ready to wrap and install in a
racer. Notice that there is only one outlet for the fuel and a pressure
tap at the bottom. Taped to the bottom of the tank is a tongue depressor.
It is there to keep the tank from moving too far ahead and collapsing
or damaging the fuel lines against the firewall.
We stock the Tettra tanks in 4 different racing sizes. The 3 and
4 oz. Tettra tank (TET-00, TET01) is for the 424 or the APRA class
of racers. These airplanes do not use as much fuel for a race and
do not need to carry as much fuel for a race. (Weight) Next
is the 5.25 oz. Tettra tank (TET-05). It is used by many of the
experienced racers. With these, you must start late and be flying
under 1:20 times to be assured that you will have enough fuel to
complete the 11 laps of a heat. If you want the security of the
extra oz of fuel, then the 6 oz. Tettra tank (TET-10) is your
best choice. The 6 oz is also used for the FAI racers.
The process for fueling is simple. You must first evacuate the air
from the bladder and then put the fuel in the tank. We use a Jett
Super Tanker (JETT-30) to make this a one-step process. You first
fill the Super Tanker with enough fuel to fill the size of tank
you are using. Then attach the Super Tanker to the line running
to the carburetor on your engine. Suck all the air out and then
push the fuel in. One operation with no danger of leaving some air
in the tank… Very simple.
Do yourself a favor, use a bubbless tank in your racers. It will
make your equipment more reliable and your engines last longer.
The engines do not like the heat generated by bubbles in the fuel-line.
have the same girth; 1-5/8" tall x 1-7/8" wide
Length without the neck:
3 ounce 2-5/8"
4 ounce 3-3/8"
5.25 ounce 4-1/4"
6 ounce 4-3/4"