The Brügger Colibri is a small low wing, tail dragger aircraft powered by Volkswagen 4 cylinder engines. Its a Home Built that was designed in Switzerland by Max Brügger in the 1960’s

https://en.wikipedia.org/wiki/Br%C3%BCgger_Colibri

For those interested in a RC version outerzone has a free plan for a 46″ version

https://outerzone.co.uk/plan_details.asp?ID=11707