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Unread 06-02-2017, 15:25
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Re: How do you shoot so fast?

Quote:
Originally Posted by rich2202 View Post
The motor stays the same. It is the addition of the flywheel that matters.

Let's say that the wheel is spinning at 600 rpms, and declines to 550 rpms after a shot. You have to wait for the wheel to spin back up to speed.

After adding the flywheel, the 600 rpms delines to 590 rpms after a shot. The motor then goes to 100% to speed back up to 600 rpms. You can then shoot as fast as the motor can deliver energy to the system.
That is not exactly correct. Technically a ball removes the same amount of energy from a high or low inertia system and it will take the same amount of power to get it back to the original state.

The advantage of more rotational inertia is that a single ball will lower the RPM by a smaller amount. Assuming you've engineered your system to have a window of RPM's you can make a shot in, the higher rotational inertia will end up giving your system more time to react to the loss of energy. That is the key.

1. Your rotational inertia should be high enough that you can shoot more than 1 ball without dropping out of your acceptable window.
2. This allows the system enough time to react and ramp up the motor power to compensate and keep the system inside the window.
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