Twin engine rubber band powered plane

I get lots of requests to make a Rubber Band Powered Plane, even twin engine, and I have been hoping to come across a matched pair of suitable propellers but haven’t really got a suitable set yet. However I do have a couple of small propellers for electric power so I will use them. it would also fly better if you used the right sort of propellers. The props I used are designed for small electric motors and are meant to spin very fast. Rubber band propellers spin slower so they have wider blades to push more