What are the largest RC aircraft engine on the market?

Question

In terms of thrust, weight and size. Money is no object

I am attempting to build a 1:6 scale AN-225

Approx size 14.73m wingspan

14m length

3.03m height

Answer 1

You don't necessarily need the largest engine available.

What you need to do is figure out the thrust to weight ratio. For realistic flying characteristics, use the actual real thrust to weight ratio, and derive the needed thrust by the weight of your model when applying the thrust to weight ratio.



For example, say the real thrust to weight ratio was 1:3. If your model weighs 300 pounds then you need 100 pounds of thrust. Then you needthen divide it by the number of engines that you want to use.

Like, you could simplify the building by using two more powerful ducted fan engines and just build dummy nacelles for the other four engines. So with the example ratio, you would need 2 engines with 50 pounds of thrust each. Or 4 engines with 25 pounds of thrust each.

Then when you know how powerful your engines need to be, and look at the different engines available, and Tower Hobbies is the first place I'd look.

I'm gonna say that with ducted fans, electric is way easier. But glow power is do-able. And multi-engine is easier with electric. So if you really wanted all 6 engines, do electric fans and spend more time flying than s******g around starting engines on the ground.

I'm not even gonna say that you're crazy for thinking about such a big-a** plane. You go with your bad self. But I would say, try building a smaller prototype so you can see what works and what doesn't.

I went ahead and worked it out:

Actual Thrust to Weight based on MTOW is about 1:4.3

6 engines at 51,600 lb/ft of thrust = 309,600 lb/ft

MTOW = 1,322,773 lb

309,600 to 1,322,773 reduces to about 1:4.3

Answer 2

the an-225 is the heaviest and largest aircraft in the world. as for thrust  it is equipped with 6 ZMKB Progress Lotarev D-18T turbofan jets, each capable of pumping out 51,590 pounds of thrust.