I need to clue everyone in (again) about round fuse airplanes and mufflers.

With an Extra or Edge or a real Pitts the engine is mounted high on the fuse and the muffler is meant to hang down underneath, this is the way the full scale planes are designed and our engines mimic them.

Round fuse planes use a radial engine with a round exhaust manifold. When we try to model them the pitts type muffler is in the wrong place and usually ends up being too low and requiring a hack job on the bottom of the cowl.

This is why canisters are popular on round cowl airplanes. Please keep us informed as to whether your Sukhoi will accept a pitts muffler without major surgery.

TF