I have a set of the S&W Titanium mufflers. Tried them on a DA-100. Fairly quiet operation, engine ran fine, didn't seem to have any issues temperature-wise, but just didn't seem as powerful as we thought it should be. Breaking it in with a Menz 27x10 prop, couldn't get above 5700 rpm. Took the mufflers off one day and ran open exhaust - went up to something like 6200 rpm.

Switched over to a set of 'standard' mufflers from SlimLine. Definitely a bit noisier, but still in the 6100+ rpm range.

The output end of the mufflers looks like it's a titanium washer welded to the end of the 'pipe'. That could probably be drilled out and reduce the back-pressure a bit. Might get some RPM gain, but it would then be louder.

Bottom line: Light - yes. Quiet - reasonably so, not as quiet as canisters. "Minimum" power loss...... define minimum. I saw about a 500 rpm gain by switching to a standard muffler..... I'd call that more than "minimum", but maybe it's just me!


So...... I have $300 worth of S&W Titanium mufflers sitting there on the bench doing nothing..... if anyone wants to try out a set for a DA-100, first $50 gets them!! Or, might be an interesting experiment for a couple of DA-50's!!

Cheers.

Barry