Would it be a good idea to have a flywheel on a bicycle to help smooth out the "dead zones" when pedaling, kinda like those oval sprockets were designed to do? Perhaps some design that can let the user try different weights and select the best one for them? This could be used on bikes that are not being raced but rather on those where smoothness is desired. The flywheel could be designed to work well with a moderate cadence such as between 60 and 90. For a simple flywheel, they could attach something to the front chainring to give it more weight. Perhaps a poor mans flywheel would be to attach magnets to the outside of the largest chainring just inside of the teeth so no contact with the chain.
As a side advantage, when going up a hill with a flat approach area, you can build up a high cadence and thus store up a little more energy. The total added weight should be no more than 1 pound.
Actually I think just installing heavy tubes should have a similar flywheel effect and I already purchased one of those.
A bike is different than a car since a bike has high torque but low horsepower so the flywheel design would have to account for that.