Seriously , Is it possible? Given that the takeoff run should not be too long

Let's not add new conditions like short take off run etc just yet.

The basic issue is whether 45kg will fly at 15kg thrust.

Means whether it can maintain level flight.

An associated question is whether this is enough for take off.

There exists an airplane that weighs 2000kg.

Has 4 motors of 7500watts max power each.

Or 30,000watts total. Or 15watts/kg.

This much power is only used for takeoff.

The average power consumption in a flight is only 6000watts. Or 3 watts/kg.

Which plane is it?

I know I've given an extreme example. That's just to prove the point.

BTW, usually only jets quote thrust, prop planes usually hp or watts.

I'm not sure if you are considering building a 45kg model, and really want to know the power reqd.

If you are really building a 45kg model (knowing the legal implications) I'm sure lots of members will follow your thread.

Unless of course, your query, if not jocular, was only theoretical.

In which case the answer is Yes.