The Blue Book features over 200 civilian model helicopters. Information on specifications, current and historical resale values, current and historical manufacturer pricing, component overhaul and retirement intervals, and hourly maintenance cost is available for most models. Also included with your subscription is the model comparison tool that allows side by side comparison of data for up to three models. To see a sample of the Blue Book, click on "Menu", Resouces, then Blue Book Sample. To see a complete list of models and available model data, please see the Blue Book Index.