FAQ

SteinAir Products

Pitot / Static Info

Tubing

Our pitot static tubing is Nylon. This is flexible and durable and will last decades. It is rated for both extreme heat and cold conditions.

Fittings

Our pitot static fittings are durable and long lasting. Inside the holes of the fittings are a ring of teeth which grip the tubing for a secure fit. These have been proven to be very effective and do not leak.

They have teeth You must get a flush cut when cutting the tubing or it can be prone to leaking. We recommend using a P-510 Cutting tool to get a straight cut.

Leaks

Most often the tubing is leaking at a connection point. The two biggest reasons there is leaking is because it is leaking around the threads of a fitting or the tubing was cut at an angle.

You must use Teflon tape around the threaded fittings -same as you would with the plumbing in your home. You must also be sure to get a straight cut when cutting the tubing or it can be prone to leaking. Do not cut at an angle. We recommend using a P-510 Cutting tool.

Steps to building a panel

Equipment

Deciding which systems and equipment fit your needs (and wants!)

Design

We design your panel with you. We will send you PDF revisions of your design until we reach an “approved design”.

Metal Fabrication / Paint / Engraving

We will cut the panel and do all the metal fabrication – mount the rails, nutplates, rivets, etc.
Then we will have the panel painted at our local auto body shop.
Then the panel will be laser engraved per the latest “approved” design.

Wiring

We will make wiring schematic for all of the avionics, switches, and circuit protection (going to or from the panel only).
We will build up the harnesses and make all of the interconnections between instruments.
We will provide flying lead for things like heated pitot, interior lighting, exterior lighting, servos, magnetometers, etc.
All wires will be labeled and color-coded per the wiring diagram – which will also be provided with your panel.

Configuration and checkout procedures

We will power up the system here on the bench at SteinAir.
We will configure as much as possible between instruments but it will be the responsibility of the builder to add final configurations, such as aircraft specific settings and the manufacturer’s recommended settings. All of this information can be found in the manufacturer’s installation manuals.
Once we are satisfied everything is working here on the bench we will take photographs and get our documentation together before wrapping everything together for shipping.

Final Invoice and Shipping

We will put together the final bill for parts and labor. This is when we will take ALL your money ; )
Then we will pack up the panel and equipment securely in a custom crate and send the panel with insurance via UPS 3 Day.
You will be excited with anticipation for 3 days until the crate arrives.
Open the crate and enjoy!

Builder Info

Antenna Mounting Locations

Transponder Antenna

104-12 Monopole Antenna
- This antenna can be mounted on bottom of fuselage -on the belly of the beast.

104-17 — ADS-B Monopole Antenna [ freq 978 MHz ]
- This antenna is for ADS-B only. This can also be mounted on the bottom of the fuselage.

CI-105 — Blade transponder / ADS-B antenna.
- This can be mounted on top or bottom of the fuselage.

Radio/Com Antenna

CI-121 / CI-122
- This antenna should be mounted on the bottom of the aircraft, typically under the pilot. If two com antennas are being installed, they should be 3 feet apart.

GPS Antennas

GA-35 – WAAS GPS Antenna
- This antenna should be mounted on the top of the aircraft, either in front of or behind the canopy. It should not interfere with opening the canopy. If there are two GPS antennas being installed they can be mounted in-line or offset. Mount them at least 6 inches apart. Typically used with Garmin GTN units.
GA-26X – Internal Mounted GPS Antenna (formally GA-26C)
- This antenna can be mounted on the glare shield or on a mounting plate behind the panel. Typically used for the PFD and/or MFD gps source.
GA-57x – Combo XM/GPS Antenna
- Garmin GPS + a Garmin XM receiver. This antenna can be mounted under or above the aircraft along the fuselage. Mount at least 6 inches away from other antennas. Typically used with G3X system with xm weather.

Flaps

Flap Position

If you want intermediate stops or flap position feedback on the EFIS, install a Ray Allen POS-12 position sensor.

Where to mount the Ray Allen POS-12:
The POS-12 should be mounted so that a pushrod can be attached to both the POS-12 and to the bell crank on the flap system. The pushrod should be mounted a certain distance away from its center of rotation so that the position sensor arm moves 1 inch as the flaps move through their entire range of travel. This distance can be found through trial and error.

Wiring:
The flap position sense wires should either be wired to the G3X system via the GEA24 or wired to the Vertical Power system.

G3X Flaps

Flap Position:
Flaps/trim position can be wired to any available input on the GEA24 with “POS” in the name.

Flap Power:

G3X with Vertical Power:
Vertical Power: When using a Vertical Power unit, trim and flap positions will automatically be displayed. Connecting, configuring, and calibrating the POS inputs is not required when the position sensors are connected to a Vertical Power unit.

VPX Flaps

Vertical Power and G3X system:
When using a Vertical Power unit, trim and flap positions will automatically be displayed. Connecting, configuring, and calibrating the POS inputs is not required when the position sensors are connected to a Vertical Power unit.

Trim

G3X Trim Wiring

VPX Trim Wiring

The VP-X controls the trim motor as well as provides the circuitry to report the trim position to the EFIS. It also handles runway or faulted trim conditions, and enables the EFIS to control the trim from the screen. All of the trim wiring is connected directly to the VP-X, and the trim position is reported to the EFIS over the serial data line. The trim motor circuit breakers are set at 1 amp, and are not configurable.

Most experimental aircraft use trim servos from the Ray Allen Company. These servos are self-contained units that include the trim motor as well as a position sensor. These servos are designed to run at 14 volts, and the VP-X Pro provides regulated 14v power to the trim motors so they can operate safely in 14v or 28v systems. The general principles described in this section apply to other brands of trim motor as well.

Connecting the trim motor to the VPX:
The trim motor itself is driven by the two white wires. It does not matter how they are connected, as the polarity can be changed using the VP-X Configurator. The direction of travel is controlled by reversing the positive and negative connections to the trim motor.

(VP-X Install Manual, Rev E, 2021)

Ray Allen Trim Position

Where to mount the POS-12:
The POS-12 should be mounted so that a pushrod can be attached to both the POS-12 and to the bell crank on the flap system. The pushrod should be mounted a certain distance away from its center of rotation so that the position sensor arm moves 1 inch as the flaps move through their entire range of travel. This distance can be found through trial and error.

RV14

RV14 Circuit Breaker Panel

When installing the circuit breaker panel provided by SteinAir it is
important to ensure that the copper busbars are not making contact with the
airframe at any point. In most cases the builder will need to trim the flanges,
marked in red, on the backside of the mounting bracket to avoid this.

RV12

Harness

SteinAir manufactures the harnesses for the RV12 package. We check each and every harness for continuity and provide a test report to prove accuracy.

Section

Garmin Questions

Configuration Mode

To enter configuration mode:

Press NRST, MENU and BACK simultaneously to reboot the GDU.
Then continue to hold the MENU button while the screen is powering up.

This will enter config mode where you may change your settings.

Garmin Database Updates

To update your Garmin Aviation Databases go to https://fly.garmin.com/fly-garmin/ . The databases can be downloaded to a SD card and then loaded into your G3x System via the SD card slot on the display.

How to Calibrate ADAHRS?

To calibrate the ADAHRS … see section 35.4.7 ADAHRS (Air Data Attitude/Heading Reference System) Calibration Page of the G3X Installation manual (rev AP).

Identify Pressure Sensors

Carbureted Fuel Pressure Sensor, 15 PSI

On the G3X Carbureted fuel pressure transducer you want to look for the markings P4055-15G on the brass fitting.

Purchase link > G3X Fuel Pressure Sensor, Carbureted

Injected Fuel Pressure Sensor, 75 PSI

There are currently two pressure transducers in circulation for the G3X Fuel pressure with Fuel Injected engines. Both sensors are 75 PSI sensors.

The original transducer, which was sold up until 2021 and has since been discontinued, was a black molded plastic housing with a brass fitting. (see below).

On the G3X Fuel pressure transducer you want to look for the markings P4055-75G on the brass fitting.

G3X fuel pressure sensor, injected 75 PSI (discontinued as of 2021)

The new fuel pressure transducer on the market is a chrome fitting. and looks like this:

Purchase link > Garmin G3X Fuel Pressure Sensor 011-05783-20

Manifold Pressure Transducer, 30 PSI

There are currently two pressure transducers in circulation for the G3X manifold pressure. Both sensors are 30 PSI sensors.

The original transducer, which was sold up until 2021 and has since been discontinued, was a black molded plastic housing with a brass fitting. (see below).

On the G3X Manifold pressure transducer you want to look for the markings P4055-30A on the brass fitting.

G3X Manifold pressure sensor > (discontinued as of 2021)The current G3X-Manifold sensor is a chrome fitting and looks like this:

Purchase link > Garmin G3X Manifold Pressure sensor 30 PSI p/n: 011-05783-00

Oil Pressure Sensor, 150 PSI

On the G3X Manifold pressure transducer you want to look for the markings on the brass fitting.

The piece should have this marking on it: P4055-150G

G3X Oil pressure sensor 150 PSI 494-30004-00

G3X-OIL-PRESS Sensor

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