In this five-part series Mike explains how to analyze the effectiveness of your rigging.
Blade Slip is a critical dimension to measure the effectiveness of the crew's rigging as it directly related to the distance the boat moves during the drive phase of the stroke. This video explains the dimension of Blade Slip, how to measure and evaluate it.
Drive Time is a measurement of the time between when the blade is fully buried at the catch to when the blade is extracted from the water and reaches the feathered position. This dimension provides an insight to the rigging load and length of stroke.
Stroke Position relates to the position of the outboard oar relative to the boat. The Stroke Position is a measurement in percentage of time that the oar spends in the water before it reaches the perpendicular to the boat.
Stroke Ratio is a measurement of the time the athlete spends on the recovery divided by the time spent on the drive.
This video discusses the about four measurements and how rigging length or load can be adjusted to increase the efficiency for the crew.
This video outlines the process of how to capture video using a smartphone or camera for boat speed or rigging analysis.
1) Setup video camera on tripod (stationary) aimed perpendicular to the path of the boat.
2) The camera should be at a distance 50 to 60 meters from the boat.
3) The camera should be zoomed in to record two complete strokes.
4) The camera should be set to record at 60 frames per second (FPS).
5) The video file format should be set to mp4, but most formats are usable.
6) Aim the camera to allow the boat to cross through the viewfinder frame horizontally in the centre of the screen.
7) A number one bow marker on the boat is ideal to allow easy tracking.
8) The crew should be rowing at race rate and intensity as in body of race (not sprinting). Video taken during a race between the 500 and 1500 is ideal.
9) Measure and record the boat length from bow to stern.
10) Record the rigging dimensions of spread, oar length, inboard and blade type.
To receive your Analysis Sheet
11) Send the video along with the boat length and rigging dimensions to email@example.com for analysis. Large video file size may need to be uploaded to a DropBox available by emailing firstname.lastname@example.org.
12) You will receive a PayPal invoice for $79 CAD (includes tax) that can be paid by credit card or PayPal account. You can also pay through RegattaCentral at Camps & Clinics -> Purcerverance -> Coaching Analysis.
Stroke Ratio and Stroke Rate
Making Rigging Adjustments