Terry flew his Waco YKS for me yesterday morning. We thought we'd be grounded because the generator wouldn't come online (airplane uses the battery to provide the spark unlike magnetos) but we thought we'd at least start it up. Then we thought we'd take it around the patch just once. We levelled off after takeoff and -voila!-the generator was online. Smiles all-around! We flew around for 10 minutes but the humidity was unbearable so we landed.