We have two products, the Ventos wind sensor, and the Zenith body position sensor. Each product can be used separately, but they work very well together.
The Ventos contains sensors to measure wind speed, direction, and elevation (from dynamic pressure, yaw angle and barometric pressure). It also calculates the CdA in real time and transmits this information to the head unit for display and logging.
To measure CdA on a bicycle we require a power meter and a speed sensor. We have a strong preference for speed sensors with a magnetic pickup, but if testing on long stretches of road, other speed measurement such as GPS or compass based sensors can work.
The Ventos is currently supported on Garmin head units via a ConnectIQ app and on the Hammerhead Karoo and Karoo 2 via a sideloaded android app. The Ventos connects directly to the bicycle power meter and speed sensor via pass pairing from the head unit. CdA calculations are performed within the embedded code on the Ventos to allow real time CdA calculation. It also logs dynamic pressure, wind yaw angle, barometric pressure, and air temperature which are then recorded into a FIT file. We also log the energy split between aerodynamic, gravitational, rolling resistance, and acceleration. For higher data rates than 1s FIT files, there is onboard file storage, and the Android app can store higher rate data via other file formats.
The Zenith body position sensor records a rider's head and chest position, and can also determine if a rider is standing or in the saddle. This information is again transmitted to the head unit.
The Zenith body sensor arose to solve a problem we encountered in our early testing - we were getting inconsistent aerodynamic results as riders were not maintaining a consistent body position. Even very experienced riders often changed their position as they fatigued or under situations of heavy exertion. To test the repeatability (precision) of the Ventos in real world conditions, we needed something to keep the riders in the same position. However, when we began using the body position sensor to conduct our own internal testing, our test riders realised that this could be a very useful item not just for aero testing, but also training and racing. We decided to create the Zenith as a standalone sensor which measures the riders head and chest position. This information is not only extremely useful when looking at aero data, but also when a rider is training to 'learn' a new aero position.
The Zenith is supported on Garmin head units again via a ConnectIQ app as well as the Karoo via a sideload. On Garmin head units there is also a ConnectIQ Data Field so head and chest position can be combined with a riders customised screen.
John Buckley
https://streamlines.aero
The Ventos contains sensors to measure wind speed, direction, and elevation (from dynamic pressure, yaw angle and barometric pressure). It also calculates the CdA in real time and transmits this information to the head unit for display and logging.
To measure CdA on a bicycle we require a power meter and a speed sensor. We have a strong preference for speed sensors with a magnetic pickup, but if testing on long stretches of road, other speed measurement such as GPS or compass based sensors can work.
The Ventos is currently supported on Garmin head units via a ConnectIQ app and on the Hammerhead Karoo and Karoo 2 via a sideloaded android app. The Ventos connects directly to the bicycle power meter and speed sensor via pass pairing from the head unit. CdA calculations are performed within the embedded code on the Ventos to allow real time CdA calculation. It also logs dynamic pressure, wind yaw angle, barometric pressure, and air temperature which are then recorded into a FIT file. We also log the energy split between aerodynamic, gravitational, rolling resistance, and acceleration. For higher data rates than 1s FIT files, there is onboard file storage, and the Android app can store higher rate data via other file formats.
The Zenith body position sensor records a rider's head and chest position, and can also determine if a rider is standing or in the saddle. This information is again transmitted to the head unit.
The Zenith body sensor arose to solve a problem we encountered in our early testing - we were getting inconsistent aerodynamic results as riders were not maintaining a consistent body position. Even very experienced riders often changed their position as they fatigued or under situations of heavy exertion. To test the repeatability (precision) of the Ventos in real world conditions, we needed something to keep the riders in the same position. However, when we began using the body position sensor to conduct our own internal testing, our test riders realised that this could be a very useful item not just for aero testing, but also training and racing. We decided to create the Zenith as a standalone sensor which measures the riders head and chest position. This information is not only extremely useful when looking at aero data, but also when a rider is training to 'learn' a new aero position.
The Zenith is supported on Garmin head units again via a ConnectIQ app as well as the Karoo via a sideload. On Garmin head units there is also a ConnectIQ Data Field so head and chest position can be combined with a riders customised screen.
John Buckley
https://streamlines.aero
Last edited by:
John Buckley: Apr 18, 21 6:28