Evolution Engines 62GXI - Manual (Page 7)

7
Throttle Curve Setup
Fuel Feed (F)
Fuel Return (R)
Refer to the Fuel Delivery System section for
information on plumbing the fuel tank. This
system uses a new setup and requires special
attention when setting up the fuel tank.
1. Connect the medium diameter Viton fuel
tubing to the fuel tank supply line and the
fuel tubing connector on the throttle body
labeled “F”.
2. Connect the medium diameter Viton fuel
tubing to the vent line. Run this fuel line
either around the back of the tank or make
a loop on top of the tank to create an “anti-
syphoning” loop. Take the other end of the
fuel line and route it outside the airplane
fuselage.
3. Connect the medium diameter Viton fuel
tubing to the return port on the throttle body
labeled “R”. Connect the other end of this
line to a tee. Connect one end of the tee to
the fueling line in the tank and the other
end to the aircraft fuel inlet wherever you
feel is most appropriate. We recommend
you use an external fuel dot in order to fuel
the airplane without needing to remove any
hatches or cowls.
A. Tank Vent Tube
B. Fuel to EFI Unit
C. Return Line from EFI and Tank Fill Tube
A
B
C
Attaching the Fuel Lines
The engine’s throttle body flapper valve provides
non-linear engine response to throttle changes
(greater power increase between low throttle to
50% than 50% to full throttle). We recommend
using the Throttle Curve feature on your
transmitter to provide a more linear response.
Using these Throttle Curve settings, shown
from a Spektrum ™ DX18 transmitter screen
shot, with a properly setup throttle linkage will
provide a very linear feel to the throttle.
1. Ensure you have set up the throttle linkage
as described in the Connecting the Throttle
Linkage section. It is very important that the
low throttle and high throttle endpoint travel
of your servo be as close to even as possible
(i.e. Low throttle, trim closed -100%, high
throttle 100%). A variation of as much as
10% between these two values is tolerable.
2. Enter the numbers from the diagram into
your transmitter’s Throttle Curve menu and
activate exponential (if applicable).
3. Once the engine is started and running
correctly, check the feel of the throttle
response. Adjust it to your liking through
your transmitter’s programming screen.