Project
Sugar / Kno3 engine

Construction

• These engines used a cast sugar / Kno3 mixture. The sugar / Kno3 mixture was heated with water in an electric wok at 300 deg. until all the water had boiled out and the sugar was in a molten form. The fuel was then poured into a Schedule 40 PVC engine casing, a mandrel for the fuel core was inserted and the engine was left to cool. This method of casting sugar / Kno3 fuel is still used in current projects with a few exceptions listed later. A PVC male adapter was used to hold in the Pourstone choke used as a nozzle and a PVC cap was used to hold in the Pourstone end cap. Ignition was electric. All PVC was 1 1/2".

Pros

• All engines fired perfectly.

Cons

• Choke for nozzle is inefficient.
• Pourstone for end cap adds too much weight.

Pictures

• I decided it was time to flight test some engines when this static test came loose.

Video

• None

CAD Drawings

• None