This is probably my smallest build so far. It is a drone with 2 engines and 3 fuel tanks. With some effort it can be put into a hover and flown around. Just make sure to set it to radial out when flying. When out of fuel, set it to retrograde and deploy the parachute.

'0.6:2+|-21|33|40|1|90|117|>|-21|26|38|2|-180|0|>|-40|29|49|1|-45|0|>|-2|29|49|1|45|0|>|-15|18|14|1|90|0|>|-27|18|14|2|-90|0|>|-21|37|16|1|0|80|>|-21|33|40|1|-90|117|>|-21|38|30|1|0|0|