and Carlisle sought an external supplier for rocket engines. Vernon Estes, whose family fireworks company was listed first in the Denver phone book, designed a machine capable of producing rocket engines every 5.5 seconds. Unwise business decisions eventually forced Model Missiles, Inc. out of business, and Estes took over production with his own company, Estes Industries. Orville Carlisle became the first member of the National Association of Rocketry (NAR #1), founded in 1957 by G. Harry Stine. Later, he served as a member of the Technical Committee on Pyrotechnics of the National Fire Protection Agency. Only two original "Rock-A-Chute" models survived, both of which are preserved in the National Air and Space Museum. References Stine, G. Harry. "The Roots of Model Rocketry." Sport Rocketry, January–February, 1998, pp. 6-9. External links Orville H. Carlisle (February 1958) "The Do's and Dont's of Model Rocketry" The Model Rocketeer, Vol.1, No.1, Accessed 9 September 2010 Model rocketry People from Norfolk, Nebraska 1917 births 1988 deaths 20th-century American inventors