Van's Aircraft RV-7A, Flight Manual

Page: 134 / 181

HB-YMT Airplane Flight Manual
7–30 Description of the Airplane and its Systems 01/00
7.9 Powerplant
7.9.1 Engine, General
The engine is a Mattituck TMX Mattituck TMX Mattituck TMX Mattituck TMX----IO360 IO360 IO360 IO360 experimental Lycoming
clone with the Red/Gold enhancements and roller roller roller roller----lifters lifters lifters lifters.
It’s an air cooled, four-cylinder horizontally-opposed (boxer)
design.
ECI experimental fuel injection
ECI experimental fuel injection ECI experimental fuel injection
ECI experimental fuel injection (a copy/adaptation of the
proven continental fuel injection) and EC
EC EC ECI cold air induction I cold air induction I cold air induction I cold air induction
(oil sump and air plenum are physically separated) give it
extra smoothness and power.
Ignition is by two Emagair P
PP P----Mag Mag Mag Mag 114series electronic electronic electronic electronic
ignition
ignition ignition
ignitionssss driving automotive spark plugs (NGK BR8ES).
Starter is a lightweight SkyTec
SkyTec SkyTec SkyTec NL NL NL NL. The engine also drives a
Nippon Denso 55
55 55
55A
A A
A automotive alternator
alternator alternator
alternator.
Compression Ratio is 8.5:1 8.5:1 8.5:1 8.5:1 Rated Horsepower is 180h.p. 180h.p. 180h.p. 180h.p. at
2700 RPM 2700 RPM 2700 RPM 2700 RPM. The engine has a TBO TBO TBO TBO of 2400hrs 2400hrs 2400hrs 2400hrs.
Specialties of the TMX/Red Gold package:
crankcase modifications including; o-ringed thru studs; LSI
crank sensor mounting holes; front crankshaft thrust
lubrication and relieved cam bearing bores, roller tappet cam
and tappet technology, precision balance package,
combustion equalization package, intake and exhaust port
flow matching.
The exhau
exhau exhau
exhaust
st st
st system is a combination of a Vetterman
Vetterman Vetterman
Vetterman stainless
steel 4 4 4 4----into into into into----4 4 4 4 with a 4 4 4 4----into into into into----1 1 1 1 collector outside of the cowl. At
the back is a custom Liese muffler
Liese muffler Liese muffler
Liese muffler .to reduce noise footprint.
To allow for normal oil temperatures in wintertime, an oil
cooler airflow shutter is installed. Its position is semi-
permanent. No cockpit controls are available, however, its