Aerosensor Aerodynamic Cycling System Manuel utilisateur

ACS Instructions V7.0 1

aerosensor

cycling

system

Instructions V7.0

ACS version 3.19

21.08.23

 
ACS Instructions V7.0 2
Contents 
Important notes.....................................................................................................................4 
aerosensor....................................................................................................................4 
aerobody.......................................................................................................................4 
aerodrome.....................................................................................................................4 
Introduction...........................................................................................................................5 
Prerequisites .....................................................................................................................5 
Bike Computer...................................................................................................................5 
Power Meter (PWR) ..........................................................................................................5 
Speed (SPD) or Speed/Cadence (BSC) Sensor................................................................5 
Device mounts...................................................................................................................5 
aerosensor basics................................................................................................................6 
Device specifications .....................................................................................................6 
Layout............................................................................................................................6 
Button functions.............................................................................................................6 
LED significance............................................................................................................6 
aerobody basics...................................................................................................................7 
Device specifications .....................................................................................................7 
Layout............................................................................................................................7 
Button functions.............................................................................................................7 
LED significance............................................................................................................7 
aerodrome basics.................................................................................................................8 
Device specifications .....................................................................................................8 
Layout............................................................................................................................8 
Button functions.............................................................................................................8 
LED significance............................................................................................................8 
aerosensor installation.........................................................................................................9 
aerobody installation ..........................................................................................................10 
aerodrome installation........................................................................................................11 
Aerosensor Cycling System CIQ App Setup .......................................................................13 
Garmin Connect IQ app...................................................................................................13 
Installation.......................................................................................................................13 
ACS general screen layout..............................................................................................13 
aerosensor setup in CIQ app..........................................................................................14 
Connection...................................................................................................................14 
Pass-pairing.................................................................................................................14 
aerosensor Parameters...............................................................................................15 
Velodrome testing - Track layout..................................................................................17 
Velodrome testing - Calculation mode..........................................................................18 

 
ACS Instructions V7.0 3
aerosensor demo mode..............................................................................................19 
aerosensor information ...............................................................................................19 
aerobody setup ion CIQ app...........................................................................................20 
Connection...................................................................................................................20 
Set Reference..............................................................................................................20 
Set Null Zone...............................................................................................................21 
aerobody information...................................................................................................21 
Riding with aerosensor.......................................................................................................22 
General riding..................................................................................................................22 
Out and back testing........................................................................................................22 
How to test...................................................................................................................22 
Calibration....................................................................................................................22 
Velodrome testing ...........................................................................................................23 
How to test...................................................................................................................23 
Calibration....................................................................................................................23 
Quick Start Checklist...........................................................................................................24 
aerosensor .....................................................................................................................24 
aerobody ........................................................................................................................24 
aerodrome......................................................................................................................24 
General aero testing tips .................................................................................................24 
Aerodynamic basics............................................................................................................26 
What is aerodynamic drag?.............................................................................................26 
How do we measure aerodynamic drag?.........................................................................26 
Why is aerodynamic drag important? ..............................................................................27 
Testing................................................................................................................................28 
Aerodynamic testing protocols & case studies.................................................................28 
Overview......................................................................................................................28 
Terminology.................................................................................................................28 
Baseline control ...........................................................................................................28 
Case studies....................................................................................................................29 
Equipment....................................................................................................................29 
Suggested Testing..............................................................Error! Bookmark not defined. 
 
 
 
 
 
 

ACS Instructions V7.0 4

Important notes

aerosensor

aerosensor is designed for outdoor or velodrome use in dry conditions and is therefore not

suitable for wet conditions.

The device is not waterproof as by design it has pressure measurement holes.

aerosensor should be removed in wet conditions. If you think it will rain whilst you are out

riding or the road may be wet in places then take a 3mm hex key wit you so you can remove

the device and put it in your jersey pocket for the rest of your ride.

Clean aerosensor with a soft, dry cloth. Avoid using abrasive materials or harsh chemicals

that may damage the product's surface.

aerobody

aerobody uses optical sensors for measuring your body position, so keeping the sensor

lenses clean and free from debris is critical for good performance.

The USB port should be kept dry and free from debris. After charging, please ensure that the

bung is replaced firmly.

Although aerobody is splashproof, it is not designed to operate in wet conditions. Please

ensure it is removed if outdoors and raining.

Clean aerobody with a soft, dry cloth. Avoid using abrasive materials or harsh chemicals

that may damage the product's surface.

aerodrome

aerodrome uses a Tapeswitch cable as a lap trigger –the cable should not be pinched or

bent. Bending with a bend radius less than 4mm will permanently damage the product.

The USB port and Tapeswitch port should be kept dry and free from debris.

Although aerodrome is splashproof, it is not designed to operate in wet conditions. Please

ensure it is not used outdoors when it is raining.

Clean aerodrome with a soft, dry cloth. Avoid using abrasive materials or harsh chemicals

that may damage the product's surface.

ACS Instructions V7.0 5

Introduction

Congratulations on making the first step towards becoming your own aerodynamicist! This

guide outlines the key features of your new aerosensor Aerodynamic Cycling System.

Prerequisites

The aerosensor Aerodynamic Cycling System (ACS) encompasses the following 3 devices:

•aerosensor: real-time drag measurement device. Requires an ANT+ power and

either bike speed or bike speed + cadence sensor.

•aerobody: body position sensor. Does not require any other devices to work

•aerodrome: wireless lap trigger. Requires aerosensor device.

All devices require a Garmin cycling computer.

Bike Computer

Currently to use the ACS you will need a Garmin bike computer that can run Garmin

Connect IQ applications at a minimum of SDK 3.1.0. A full list of compatible devices is

available on the link below –be sure to check that the device has the “A” symbol, meaning

apps.

https://developer.garmin.com/connect-iq/compatible-devices/

We will make data fields in the future, allowing you to see data in the standard Garmin

context, and also on the Edge 130.

Power Meter (PWR)

aerosensor requires a quality power meter. Single sided pedal-based power meters are not

sufficiently accurate for good aerodynamic data. Remember that the aero data you get will

only be as accurate as the power meter used.

Speed (SPD) or Speed/Cadence (BSC) Sensor

Accurate speed measurements are critical for high accuracy data. This means using a

magnet-based speed sensor. Hub mounted speed sensors or GPS based speed sensors do

not have the time resolution necessary for high quality aerodynamic data.

Device mounts

aerosensor and aerobody have been designed to work on a variety of different bike bar

types, notably the following:

1. Drop handlebars –usually standard on road bikes and track bikes.

2. Clip-on time-trial (TT) bars –additions to road and track bikes.

3. Integrated TT handlebar/cockpit –mostly seen on TT and triathlon specific bikes.

Whilst aerosensor and aerobody can be used on most bike setups, there will be some bar

variants that may be trickier to setup. Please do not hesitate to contact us at

hello@aerosensor.tech with any questions or for advice on how to best mount onto your

bike.

ACS Instructions V7.0 6

aerosensor basics

Device specifications

Dimensions (H x W x D)

135 x 57 x 85mm

Mass

66g

Battery Life

57 hours

Wind speed resolution

+/- 0.1%

Wind angle resolution

+/- 0.1°

Altitude resolution

+/- 10cm

Layout

1. LED

2. Power button

3. Reset button

4. USB-C bung & charging port

5. Stem

6. Height/yaw adjustment screw

7. Go-pro mount

Button functions

•Power button:

oPress and release to turn on.

oPress and hold until LED turns off then release to shut down.

oPress and hold, push reset button, then release for full factory reset. This

resets the internal settings used to calculate CdA.

•Reset button:

oTo be used in case the device becomes unresponsive. Resets device without

erasing settings.

LED significance

The multi-colour LED indicates the device state as shown below:

Colour

Flashing

State

USB

Charge

Aqua

Normal

Unplugged

Normal

Red

Normal

Unplugged

Low

Amber

Slow

Off

Plugged in

Charging

Amber

Solid

Plugged in

Charging

Green

Slow

Off

Plugged in

Charged

Green

Solid

Plugged in

Charged

Note: Do not use sharp objects or tools to press buttons, this may result in damage.

ACS Instructions V7.0 7

aerobody basics

Device specifications

Dimensions (H x W x D)

36 x 32 x 64mm

Mass

37g

Battery Life

9 hours

Head position resolution

+/- 1mm

Chest position resolution

+/- 1mm

Layout

1. LED

2. Power button

3. Reset button

4. USB-C bung & charging port

5. Head sensor

6. Chest sensor

7. Quarter-turn mount

Button functions

•Power button:

oPress and release to turn on.

oPress and hold until LED turns off then release to shut down.

•Reset button:

oTo be used in case the device becomes unresponsive.

LED significance

The multi-colour LED indicates the device state as shown below:

Note: Do not use sharp objects or tools to press buttons, this may result in damage.

Colour

Flashing

State

USB

Charge

Aqua

Normal

Unplugged

Normal

Red

Normal

Unplugged

Low

Amber

Slow

Off

Plugged in

Charging

Amber

Solid

Plugged in

Charging

Green

Slow

Off

Plugged in

Charged

Green

Solid

Plugged in

Charged

ACS Instructions V7.0 8

aerodrome basics

Device specifications

Dimensions (H x W x D)

34 x 76 x 76mm

Mass

66g

Battery Life

28 hours

Timing resolution

+/- 1ms

Layout

1. Power button

2. LED

3. Reset button

4. USB-C charging port

5. Tapeswitch port

Button functions

•Power button:

oPress and release to turn on.

oPress and release to shut down.

•Reset button:

oTo be used in case the device becomes unresponsive.

LED significance

The multi-colour LED indicates the device state as shown below:

Colour

Flashing

State

USB

Charge

Cyan

Solid

Unplugged

Normal

Lilac

Solid

Trigger

N/A

Amber

Solid

Charger

Low

Green

Solid

Off

Charger

Charging

Blue

Solid

Computer

Charging

Light blue

Solid

Off

Computer

Charged

Any

Flash

Aerosensor connected

Note: Do not use sharp objects or tools to press buttons, this may result in damage.

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ACS Instructions V7.0 9

aerosensor installation

A go-pro mount is required to install aerosensor - for example one underneath a bike

computer mount (sold separately).

Use the go-pro mount itself to adjust pitch, then the yaw by loosening the height/yaw screw

on aerosensor’s stem (height adjuster) and rotating the unit.

When installing, it is important to have aerosensor as far forward and low as possible to

minimise influence of rider position.

•The base must be at least 20mm above the front wheel.

•It should be centred on the bike and facing forwards. Use the front wheel as a

reference for yaw alignment.

•aerosensor should be level - use a horizontal object to the side of the bike (like floor

markings), and visually align the bottom of Aerosensor with the horizontal line. An

example is shown below, where a horizontal line on the wall is used. Note that the

device is tolerant to pitch misalignment within +/-5°.

ACS Instructions V7.0 10

aerobody installation

aerobody has a standard Garmin quarter-turn mount. It should be positioned on the stem

using a compatible bike mount adapter such as the one supplied with the unit.

The screw on the quarter-turn mount allows pitch adjustment of the entire unit.

The forward (head) sensor should be aligned approximately with the chin and the chest

sensor points at the chest.

To align, support the bike either in a turbo trainer, or by asking someone to support the bike.

Sitting on the bike in your normal riding position watch the display whilst moving two fingers

up and down from your chin towards the unit, and ensure that the measurement tracks

movement of your fingers.

HEAD

SENSOR

CHEST

SENSOR

PITCH

ADJUSTMENT BOLT

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