DESCRIPTION

Left at the front of the Capt-sidewall is the ‘Steering Tiller’ (Noise wheel steering wheel). It is a small steering wheel in the shape of a half moon that is used for the nose wheel to steer while taxiing.
A Steering Tiller in the B737 is very seldom found on the side of the F/O.

The steering, with the Steering Tiller’ gives a greater and more direct control range than with the use of the rudderpedalen. The amount of turn is 78° in both directions t.o.v. the rudder that but is.

Behind the steering wheel there is a ‘decal’ or image that indicates in which direction one should rotate to the left, straight ahead or to the right to send.

The Steering Tiller is mainly used at low speeds to steer during taxi operations. Especially on the ‘apron’ or car parks, it is very useful to short to be able to run. Boeing recommends to be careful to deal with the steering tiller at speeds higher than 20 knots. Especially for the risk of overdriving which risk is in addition to the job. The use at speeds higher than 30 knots organised by Boeing, not recommended. Long straights or wide bends should be allowed to run with the rudderpedalen.

 

PARTS AND SOFTWARE

The Steering Tiller is made by Opencockpits and is purchased at the"Aviation Megastore‘ in Aalsmeerderbrug (NETHERLANDS).
This ‘Steering Tiller’ is already fully assembled and ready for use. He is sturdy and well made with a good grip.

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What components are in the package:

  • Steering wheel in black color with a white arrow or pointer;
  • Solid metal mounting block with built-in suspension system for vehicle-centerfunctie;
  • Robust potentiometer that is compatible with each Input I/O card.

Additional parts that are still needed and which are not in the package:

 

CONFIRMATION AND CONNECT

Steering Tiller
First is in the sidewall at the proper height with a hole drilled so the ‘Steering Tiller’. This height is dependent on the dimensions of the sidewall that one has built.
In the real version is this distance 575 mm and this from the center of the shaft on the cockpitvloer.

Attaching the steering tiller is performed via the metal block to the rear of the sidewall is attached with 4 bolts. It is a little bit careful about in which direction or angle the metal block against the sidewall and base. The arrow or pointer of the Steering Tiller should be horizontal pointing t.o.v. of the floor. The openings for the bolts are then signed off on the wooden surface and numbered.
So, I first test if the Steering Tiller once confirmed, against the sidewall, or who are on the right place. After the full finishing of the sidewall is thereafter easier to see everything without error back to mount.

The bolts for the mounting can be on the inside of the cockpit to let sink in the wooden wall panel of the sidewall through which lights from drilling. Here are the decalplaatje with a sticker over it to be stuck.

The steering wheel of the Steering Tiller can be remove shaft by the turning of a madebout (allen screw).

 

I/O Card
On the back of the sidewall, in the vicinity of the metal mounting block, I used a 3 screws securing the I/O USB Axes card attached against the sidewall. Hereby I made use of ‘spacers’ to the pcb at a little distance to confirm the removal of the sidewall.

The I/O card is equipped to 5 analogue axles and 24 buttons. We have one analog axis to connect to the potentiometer of the steering tiller.

The 3 pins of the potentiometer are then connected to one of the analog input-connectors of the map. I have connector J3 used. So 3 wires from the potentiometer in the direction of J3 connector.

With the help of a pin/connector-strip (male/female), I have a connector (plug) made for 3 pins. I have a connector with 3 pins cut off of the strip, and then each time a cable soldered to each pin of the connector. Afterwards, a piece of shrink tube over it to get everything to insulate and you are done.

For the pins of the potmeter, I have plain mini-jacks like you over it can slide.

A little pay extra attention to which wire on which pin should come out. Use of threads with different colors are very useful to avoid mistakes to avoid (see image).

IMPORTANT! On the other free input connectors of the I/O board (J4-J5-J6) jumper on 2 of the 3 pins. This to this free ports to turn off and on non-active. If the free input connectors remain open (no jumper) then the calibration of the Steering Tiller afterwards virtually impossible. The calibration expires chaotic and the tiller is unmanageable.

Furthermore, there is only the USB-cable to connect.

 

Decal
I have a round kunststofplaatje at my local an engraver. In the middle there is a round opening through which a Steering Tiller.

The round piece, I first painted in the color of the sidewalls, and subsequently I have the decal glued on. After the finishing of the sidewall and in the attachment of the Steering Tiller is first the picture with the decal against the sidewall pasted.

Note. This decal has 2 colored areas in black color. If one of the dots on the (i) want to convert would be these formats, white with black contours.

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The real version

FSUIPC

To the Steering Tiller to work properly, it is recommended to properly calibrate. This first in Windows and then in FSUIPC.
The calibration via FSUIPC happens more refined, and more accurate than the result in Windows.

In FSUIPC there is no separate axis available for a ‘Steering Tiller’ but hereby use is made of the same axis of the Rudder.
The creator of FSUIPC has an ingenious manner, a separate code is written with the axis of the Rudder ‘shared’ by the ‘Steering Tiller’ and that in FSUIPC.ini is referred to as the ‘MaxSteerSpeed’.

D. w.z. to assign and calibrate the Steering Tiller in FSUIPC will be the ‘Steering Tiller’ takes precedence over the ‘Rudder’ and this with a scale of 0 knots to the value of the 60 knots (Default MaxSteerSpeed).

M. a.w. from 0 knots to just below the 60 knots one has steering controls via the Steering Tiller and from 60 knots is the ‘Rudder’ is active.

One axis indicates a time 25% priority to the other axis and this to 15kts:
– 0kts > Tiller: 100% – Rudder: 0%
– 15kts > Tiller: 75% – Rudder: 25%
– 30kts > Tiller: 50% – Rudder: 50%
– 45kts > Tiller: 25% – Rudder: 75%
– 60kts > Tiller: 0 % – Rudder: 100%

 

HOW THE ‘STEERING TILLER’ CALIBRATION

  • Start the pc and connect the I/O card to the computer via the USB cable. The allocation in Windows is done automatically.
  • Calibrate first the axis of the I/O card (name: IOCa) in Windows > follow the screen prompts and move the Tiller to the left and to the right and turn on.
  • Open Flight Simulator and then open “Options/Settings/Controls” in the FSX-menu.
  • Check in “Control Axes” on the axis of the I/O card (IOCa) or “Joystick Assignments” are present.
    Remove all of the “Joystick Assignments” that are registered on that axis. Don't forget to press the OK button.
  • Open FSUIPC in the FSX-menu (Add-ons).
  • Select in FSUIPC to the “Axis Assignment Tab” and press “Rescan”. Move the Tiller from left to right to the calibration to activate. If everything is progressing normally, you see different figures move. This in the Joy# and Axis# boxes, and In/Out boxes.
  • To the left of the screen you will see “Type of action required”. Select “Send direct to FSUIPC Calibration”.
    Select the 1st drop down menu and then select “Steering Tiller”.

 

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  • Open in FSUIPC the tab “Joystick Calibration”.
  • Use the arrows on the screen and go to “9 or 11: Pan axes”. Under the right side of the screen you will see a separate box with the title “Steering Tiller”.
  • Click on the “SET” button. This is 3 extra SET of buttons. Each button represents a position of the Tiller (left-middle-right).
  • Turn the steering wheel of the Tiller to the left, and click the left SET button. Then, turn the Tiller to the right and click the right SET button.
    Let the Tiller then come back to the middle/center position, and press the middle SET button.
    In this sequence of calibration can FSUIPC a sound where it is not possible to calibrate. The left-right order reversed. Bv. The left and the right SET-button to click it.

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  • Then Test in Flight Simulator itself. Turn e.g. with the plane in the opposite direction than the direction of rotation of the Tiller, then this is easy to solve by checking the “REV” box.
    The direction is then reversed (left is right and right is left).
  • You can use the calibration tools to refine the use of the “Slope” and/or “Null Zone”. This can be the sensitivity increase or decrease, or a ‘dead zone’ before.

TIPS:

  • Use the “Steering Tiller” preferably at low speed (Max 20kts). Slowly rotate the "steering wheel" and this with a firm grip so that the ‘steering wheel’ does not return to the center position.
  • The real Boeing 737-800 rotates with the nose wheel 78°. In FS rotates the nose gear of the B737, but 55.92°.
    You can change this in the aircraft.cfg, in the section [contact_points]. On the first line “point.0=1”, change the 7th number of 55.92 to 78.
    For example, a push-back must this be done manually. Automatically pushbacks with add-on prgs such as GEX, etc, which use their own stuurlimieten...

 

In the beginning it is a little bit to get used to and adjust. But once this “ministuurtje” optimally adjusted, then it is in the beginning a sport to become an airport anywhere extra drive around (taxi!) ... 🙂

Translated by Yandex.Translate and Global Translator