Study for the Safe Design of a 62″ Mortar

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Tent 1 | Seminar

February 18, 2023, 3:00 PM – 4:00 PM

Presented by: Eric Krug

Firework shells greater than 24 inch are rarely launched in North America, and very little technical data is available regarding these exceptionally large shells. A team was established to explore and further develop construction and engineering techniques for the manufacture and safe launch of these exceptionally large shells to support an attempt for setting a potential world record.

Proper mortar design is required to provide a safe and predictable launch in proximity to the audience and support staff. Due to the payload size and potential hazards for failure, there are many engineering considerations for the design of the mortar.

This presentation reviews the process of internal and external ballistic calculations, the development of equipment for measuring internal pressure profiles, and the evaluation of resultant data for 48 inch shells. These techniques were then used for the extrapolation of internal pressure profiles for a 62 inch shell.

Additional Session Information
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About Presenters

Eric Krug

Eric Krug graduated in 1985 from Kansas State University with a Bachelor of Science degree in Electrical Engineering Technology. He then moved to Loveland Colorado and specializes in electrical and mechanical product design. He owns his own development company that includes a full machine shop. Eric also teaches advanced CNC machining at the local community college. Eric has been very active as a licensed professional pyrotechnician since 1981. He has had the opportunity to compete in the Montreal International Fireworks Competition twice and is the lead pyrotechnician for many large pyro productions. Eric is very active in the PGI and other groups. As a part of his product development company, Eric also produces a wide variety of tools for the pyro industry.

Eric is also an accomplished musician and plays a variety of instruments.

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