Pilot's Guide to Avionics 2015-16 Edition - 42
division, continued as his always available
sounding board and avionics guide.
There was never any question of building
the panel himself. Building a reliable, safe
system using components from different
manufacturers - and testing its capabilities -
required expertise, experience and equipment
that were beyond him. Choosing equipment
from different original equipment manufacturers
was part of his all-digital redundancy plan
" because I didn't want to rely on the software
of one company," Halmos said.
The RV-10's instrument panel seems
unadorned. Two Advanced Flight Systems
5600 screens serve as his primary flight and
multifunction displays. Providing everything
John Monnett and the cockpit of the Sonex Aircraft JSX-2 SubSonex
from angle-of-attack to synthetic vision, one
single-seat jet. With limited space, the MGL Avionics 8.5-inch iEFIS
Touchscreen provides all necessary flight and powerplant information.
backs up the other. A TruTrak System Gemini
On the pedestal beneath are the RPM and EGT indicators and warning
PFD in the lower left corner of the panel
lights for the PBS TJ-100 turbine engine, the control head for the MGL V-6
backs them up.
comm radio, the audio panel and the oxygen system. The red flag to the
right is for the BRS airframe parachute.
" It's essentially a six-pack of instruments
in a 3.125-inch hole," Halmos said. " It has
a dedicated battery backup and its own
alternator on the engine accessory pad. Behind the
software. The only thing it gets from the airplane is the
panel are two TCW backup batteries, one for both AFS
pitot-static line. If everything goes dark, it can stand
displays and the other for the Gemini.
alone and get me to a safe landing. That helped settle
Halmos is anxious to make his first long crossmy mind that we're going to have electronics keeping
country in the airplane, and EAA AirVenture in Oshkosh,
the lights on in the plane."
Wisconsin, was his goal when we talked three weeks
A Garmin GTN 750's communication function is
before the event. But he's only about halfway through
supported by a GTR 225, and their audio is controlled
the airplane's 40-hour Phase 1 test flight period. A
by a PS Engineering PMA 8000BT (for Bluetooth).
Federal Aviation Administration requirement for all new
At the top of the panel are the controls for the AFS
homebuilt aircraft, it limits him to a designated area
autopilot and the Flight Data Systems GD-40 carbon
around the Hillsboro Airport. Ultimately, his patient
monoxide monitor. Below are a handful of necessary
schedule and Mother Nature are the controlling factors.
switches: master, alternator, avionics, boost pump and
Just before AirVenture, Halmos said he was a few
pitot heat. On the pedestal are the switches for exterior
hours short of 40-hour freedom, but the nice thing about
and interior lights. Unseen are the remotely-mounted
Oshkosh is there's always next year.
Dynon Avionics transponder and FreeFlight Systems
combo that provides ADS-B Out and In services.
Sonex Aircraft -
" This is the panel of my dreams," Halmos said.
SubSonex JSX-2 Jet
" ADS-B was a part of it from the start because the
John Monnett has been designing and building
deadline is drawing close."
airplanes for amateur builders since the 1970s. Most of
Halmos calls the Vertical Power VP-X electronic
them, including the current line of Sonex Aircraft kits,
circuit breaker system " the heart, the backbone of the
are (and have been) powered by VW-based AeroVee
entire installation." Integrated with the EFIS, it saves
engines. Engineered for aviation, the 80-horsepower
weight and money while adding capabilities, from starter
four-bangers are, like the airplanes they power, builderand alternation protection to wig-wag light control, and
assembled kits. Playing on the AeroVee's stingy fuel
detailed information of how much power the airplane
consumption, Monnett said with a smile that he's been
was drawing. The RV-10 has one 12-volt battery, a
Continued on page 44...
PlanePower 60-amp alternator, and a 20-amp backup
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Photo by S.M. Spangler
Continued from page 41