Airplane Flight Manual
Van’s Aircraft RV-7A
HB-YMT
7 Aeroplane and system description – Page 7
Edition 01.11.2017
7.9 Powerplant
The engine is a Mattituck TMX-IO360 experimental Lycoming clone with the
Red/Gold enhancements and roller-lifters. It’s an air cooled, four-cylinder
horizontally-opposed (boxer) design. ECI experimental fuel injection (a
copy/adaptation of the proven continental fuel injection) and ECI cold air
induction (oil sump and air plenum are physically separated) give it extra
smoothness and power. Ignition is one Unison Slick impulse coupled Magneto
on the left side and an Emagair P-Mag 114series electronic ignition on the right
side. Starter is a lightweight SkyTec NL. The engine also drives a Nippon Denso
55A automotive alternator.
Compression Ratio is 8.5:1 Rated Horsepower is 180h.p. at 2700 RPM. The
engine has a TBO of 2400hrs.
The exhaust system is a combination of a Vetterman stainless steel 4-into-4 with
a 4-into-1 collector outside of the cowl. At the back is a custom Liese muffler to
reduce noise footprint.
Engine control is achieved through:
•
Throttle Lever operating the Throttle Body Valve
•
Prop Control Lever operating the governor
•
Mixture Lever operating the lever at the ECI fuel pump.
•
Alternate Air Cable, actuating the alternate air opening inside the cowl.
Note: The alternate air flap can only be partially reset from the cockpit. To
completely reset the flap, remove the top cowl and latch manually.
Propeller is a Hartzell “blended airfoil” 2 blade hydraulic constant speed.
The engine/propeller are approved for a max of 2700 RPM, however due to
noise considerations, the max RPM is derated to 2500 by means of a mechanical
restriction on the prop lever.
Full engine instrumentation is available through the Advanced Flight Systems
EFIS/Engine Monitor.
All engine data of interest is available:
•
RPM
•
Manifold Pressure
•
Cylinder Head Temperature for each cylinder
•
Exhaust Gas Temperature for each cylinder
