high school "engineering innovations" science fair comp. R/C help needed!

[BrianG]

The main hurdle I think would be to physically fit everything on one chassis. Then, there is the cost/hassle to benefit ratio. But that aside, since we are just talking about concept, how's this:

Take a look at any electric start nitro setup (Trx Revo/Jato/etc, Losi TenT, etc). They have an electric motor that starts the motor right? Well, remove the OWB, beef up the "transmission" (gearbox connecting the electric motor to the engine), and install a proper size BL motor in place of the small brushed motor.

Then, have additional circuitry to detect when the engine is running at a certain RPM, and use that to cut the power going to the electric motor, and then pull power from it instead so it'll function like a generator/alternator to recharge the battery. That's gonna take some special ESC hardware to do that if you stick with brushless. For the sake of simplicity and time, I'd stick with a brushed setup. So, use one of the larger motors like the one used in the Summit, Kershaw 700 Revolver motor, etc. Essentially, the nitro engine would be the primary power plant and the electric would provide assist on startup and low speeds.

Any other setup will probably require LOTS of custom parts. Not sure how crazy you want to get with that though.

[edep345]

Originally Posted by BrianG

Take a look at any electric start nitro setup (Trx Revo/Jato/etc, Losi TenT, etc). They have an electric motor that starts the motor right? Well, remove the OWB, beef up the "transmission" (gearbox connecting the electric motor to the engine), and install a proper size BL motor in place of the small brushed motor.

Then, have additional circuitry to detect when the engine is running at a certain RPM, and use that to cut the power going to the electric motor, and then pull power from it instead so it'll function like a generator/alternator to recharge the battery...Essentially, the nitro engine would be the primary power plant and the electric would provide assist on startup and low speeds.

Thank you for all the hydrogen cell suggestions- but my main focus is on hybrid technology for now.

Brian, so from what I understand is that your idea involves using a bigger brushed motor to not only run the car AND be able to spin the flywheel that starts the engine? If that is the case, I would have to find a way to connect the one electric motor to the engine and the driveshafts/ center diff (to physically move the car with electric power)?

I really like that idea, but I need to find a layout for that setup...

also, about the generator, why would there be power going to the electric motor? and would pulling that power, or redirecting it reflect in a lower speed?