services ordering information top quality seat tanks offered factory direct seat tanks calumetair is the proud manufacturer of the very finest seat tanks available . our seat tanks are used by many major gyroplane manufacturers and are now being sold factory direct . these are the famous and much sought after seat tanks originally manufactured by snobird aircraft ... learn more wunderlich prerotators calumetair inc. is the exclusive manufacturer of the world famous wunderlich flex shaft prerotator . for over 40 years the wunderlich prerotator has set the standard for reliability and performance . we also sell parts and components separately for the do it yourself builder and experimenter . learn more instrumentation rotor tachs fuel gauges and more . our instrumentation has been carefully selected tested and chosen for rotorcraft use . no guessing and wondering . our products are rotorcraft tested tough if simplicity accuracy and dependability count you can count on calumetair . learn more dar services a designated airworthiness representative is a person who is authorized to perform some functions normally attributed to an faa aviation safety inspector . i strive to offer the most painless and trouble free process from registration through airworthiness certification . learn more calumetair has a long history in the world of sport aviation . founder tom milton is now offering the original snobird seat tanks factory direct . check out our selection the famous wunderlich prerotator we are the exclusive manufacturer of the popular wunderlich prerotator . the wunderlich flex shaft prerotator has been the world standard prerotator for over 30 years . copyright 2005 2016 calumetair inc. all rights reserved . contact gyroplanes aol.com