The BD-17 Nugget has been design to accept a variety of engines. We recommend engines of 40 - 80 HP that have a weight of less than 160 lbs. At the present time we have installed a Japanese manufacture twin cylinder 4 cycle engine known as HKS-700. This is a 60 HP engine that weighs 110 lbs. We will be evaluating and flight testing a variety of engines, and expect by summer of next year to have four (4) different engines tested and offered for the BD 17. There are a variety of engines that have been developed for ultra light and small homebuilts that proven to be acceptable and airworthy. Some are two cycle and some are 4 cycle engines and each has its advantages and limitations. We will not be offering a power plant package until we have thoroughly test and evaluated the installation.