Speed
The Speed display uses the tach sensor and
several measurements you enter order to provide
you with accurate speed readout. This is where
you enter those measurements.
The React must be programmed with distance in
inches traveled per number of revolutions. The
sensor then “does the math” in real time to
provide you with a speedometer function that can
be used for alerts.
The two parameters that are used to make the
Speed calculations are rollout and revolutions.
Because the React cannot use fractions, it is necessary to find two whole numbers that represent shaft
turns and wheel turns. There are two ways to do this. One involves math and the other involves
physically measuring the car’s rollout.
Calculation method
The rollout can be calculated if you know the diameter of your tire and the gear
reduction ratios between tachometer installation point and the wheels. If you are not
sure of these ratios, you should probably use the Measurement method.
Multiply tire diameter by PI (3.14159) to get length of one tire revolution.
Multiply that by the gear reduction of your differential or transmission. The result is the
number of inches your model will travel for each tick of the tach sensor.
Convert that number to a fraction that can be input into the React. You can do this by
multiplying the number by 200 or more and then rounding to the nearest whole
number. So if your model travels 4.1242 inches per tach and you multiply by 500, the
“rollout” number will be 2062.1, which rounds down to 2062, and the “revolutions”
number will be 500.
An Example
: Your Model has 3.2” diameter tires. Multiplying by pi results in 10.053”
circumference. Your Tach is mounted in front of a 13:5 gear reduction. So, the model
travels 10.053 x 5/13 = 3.8666 inches per tachometer. This is approximately equal to
116/30, so the rollout parameter should be set to 116, and the revolutions parameter
should be set to 30.
Содержание nomadio
Страница 1: ...Link to Download Desktop Software HTTP SUPPORT NOMADIO NET REACT User s Guide...
Страница 2: ......
Страница 96: ......