If everyone will please pay attention to the details that this fellow posted, you will see that the numbers are not all that extreme.

He says the bare engine weighs 3.8 lbs. The TOC-53 weighs 3.6 and a DA-50 is 3.1, so the difference is not all that great. It seems that the weight pickup is in the muffler, so I do suggest finding a better exhaust system to save a little weight.

Overall if the total weight is 5.1, this puts the engine RTF about 1 pound above the TOC-53. This is definitely well within the bounds of good sense.

It's hard to find a place to use some of these engines, it will work fine in the Sukhoi and even better if you can find a lighter muffler. In fact it might be quite remarkable, all that power should make performance pretty interesting.

TF