Hey Guys,
So I’ve had a question lingering in my mind the whole day. Which one is better to do for the Sack Attack competition?
A fully able-bodied transmission with 2 or more speeds or a single gear setup comprimising speed and torque through testing?
The thing is, that a multi-speed transmission takes up quite a bit of weight, slowing the robot down. Also, a transmission can lead to issues and also reduce driver efficiency, since time is crucial, and the time and thinking of changing gears can waste some time (IMO, you should make it easy for the driver to operate the robot to improve your score. Yes, it also does depend on the controller mapping). Also, every time another gear is added to the drivetrain, it reduces the power output to the wheels and creates more friction (This is why cars usually produce less power on the Dyno than their rated HP. Their rated HP is usually at the flywheel. ie, 2010 Ford Mustang GT is rated for 315 HP, but produces 280HP on the dyno.)
On the other hand, a single speed drivetrain saves weight, but leaves you at a comprimise, meaning that if your opponent is a good driver, and can effectively use his multi-speed transmission to his advantage (Assuming he has one), you are done for. Also, if you get stuck due to too much load, you are kinda screwed.
So, I have left myself with 3 questions:
Is it better to have a transmission or a single speed setup with a ratio satisfying both speed and torque?
Also, is there a method of creating a multi-speed drivetrain that reduces weight and driver/maintenance/power hassle?
Do you need a multi-speed drivetrain for the sack attack?