G'day

I was flying a similar, but slightly larger, Cub today. It is an old Thunder Tiger J3 Cub which is 82 inches (2.1 metre) wingspan. It was given to me and has not flown for several years. It originally had a Thunder Tiger 91 four stroke in it but I put a Saito 82 in it. With the 91 it must have been MASSIVELY over powered as with the 82 it is still way overpowered and flew most of the time on about 1/4 power.

As it was my first take off, I used full power. It lifted its tail after about three feet and positively leaped into the air after about 10 feet and tried to head straight up.

I will probably pull the Saito 82 out and put a 72 in but I suspect it would also fly quite well with either a 62 or even a 56.

Cubs have huge wings. The original J# Cub had an engine of about 40 HP which is not very powerful at all but flies the plane well. We tend to overpower our RC models but a Cub is one that really does not need to be overpowered if you are going to fly it in a scale manner.

I suspect that your Cub will fly perfectly well with engines such as the Saito 72 or the Thunder Tiger 75. The ASP 70 (which is a bit heavy) would also be fine. For me, it would be a Saito 72 or 82 if you want to go mad. The OS 72 Alpha would also be suitable but is quite expensive. I also suspect that the OS 62V and the Saito 62 would also be fine.

If you want the Rolls Royce four stroke, then the English Laser 70 or 80 would be magnificent. I have a 70 and it is a wonderful engine in scale models. But for mere mortals, the Saito 72 would be my pick.

Cheers

Mike in Oz