Stirling Helicopter Model Kit Gamma Hot Air Stirling Engine DIY Assembly STEM Educational Toy
$169.99
ENJOMOR Stirling Helicopter Model Kit Gamma Hot Air Stirling Engine Model DIY Assembly Model STEM Educational Toy Features:.It is not only a beautiful helicopter,but also powered by Gamma Stirling Engine. It can not fly, but when lighting the alcohol lamp , the spinister will spin as if it is ready to take off..Modelin