We love getting your questions, by email or on the blog. Dan writes: How much would a drive unit sized for a compact car cost? I’m [also] curious if there is a difference in the way the car drives? NRG Dynamix isn’t ready to share list price at this time. But the fuel savings for a taxi running one shift in New York over two years would be enough to pay for the whole car – NRG Drive hydraulic Drop ‘N Hybrid and all. As...

The potential for hydraulic hybrids is great — and widely varied. Heavy off-road equipment and delivery fleets are logical applications. In time, hydraulic hybrids will make sense in personal vehicles. Meantime, I continue to be intrigued by the possibilities in racing. Jeremy Kaminski of Kamien Performance Cars in New Buffalo, MI, writes, “Some supercars can put out about 600 lb/ft of torque to the wheels. Is this possible...

NRG Dynamix, Inc. expects to hire 8-10 additional engineers at its research facility in Deerfield, MI. The staffing increase to 35 comes as the company readies its NRG Drive System for production in 2011. “NRG Drive is a hybrid system that makes sense,” says NRG Dynamix President and Chief Technology Officer, James O’Brien II. “It delivers up to 60 percent better fuel economy, reduces emissions up to 90 percent and...