The initial concept for this type of Stirling engine was developed by Wilfried Schlagenhauf in Germany in 1991. Mr. Schlagenhauf, a school technology teacher, originally came up with the concept in order to better demonstrate the principles of Stirling engines to his students. A Stirling Engine is a heat engine that operates by cyclic compression and expansion of air or other gas, the working fluid, at different temperature levels such that there is a net conversion of heat energy to mechanical work. It was originally utilized as an alternative for the steam engine, but was mostly used in low-power domestic items. It is, however, very quiet and efficient. Most Stirling engine designs incorporate a cylinder and power piston as well as a diplacer piston. Mr. Schlagenhauf searched for a way to eliminate the higher priced cylinder and piston arrangement. The balloon eliminated the need for the expensive, close tolerance power piston. Having the cylinder tilt away from the heat source rather than a displacer piston being pushed back and forth greatly simplified and lowered the cost of the apparatus. This kit allows you to build a close approximation of the design Mr. Schlagenhauf pioneered, and makes for an excellent classroom demonstration, science project, or family activity.
Highly durable lab apron made of rubberized cloth is impermeable and easy to clean, perfect for all manner of lab or classroom experiments
Affordable pack of 10 PPE face shields for protection from liquids.
Great exam quality Nitrile gloves in size SMALL.
These ear plugs are made of self adjusting foam that provides a comfortable, low pressure fit and excellent sound filtration.
This set includes four (4) N95 NIOSH approved respirators.
These large, powder-free, 5mil Nitrile Exam Gloves are designed and manufactured for superior comfort and protection.
Command robotic creations with this cool construction kit!
The Wimshurst Machine is a high quality static machine for student labs.
Build your own windmill generator kit by recycling a plastic bottle!
Infiniview comes with a 3.5" LCD screen and rechargeable Lithium Ion battery that will last up to 2 hours in the field.
Ever wonder how to survive in the wilderness? These cards can help!
Get one of the craziest and coolest kaleidoscopes around!
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