hey, i am trying to build a indoor rc aircraft, i already bought a mini rc airplane and i want to add it two helicopter motors, i tryed to add two already but they didn't manage to lift the whole craft, it weighs about 200 grams or less i cant seem to find where to get two remote controlled motors with suitable propellers. can anyone help me please?

you probably want something gas powered they get so much more power get a engine from a rc car (the ones that go like 70kmh) and hook it up with the propellors

I don't think RC car engines are designed to produce the RPMs needed to run an airplane.

you can get petrol engines designed for rc aircraft though.