DA40 engine weights

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Chris M
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DA40 engine weights

#1 Post by Chris M » Tue Jun 27, 2017 1:16 pm

I brought the club 172 in today to get the altimeter tuned up. While I was there the techs brought a DA40 in to start its annual and pulled the cowl off. On both sides of the engine ahead of the forward cylinders was a set of heavy metal plates(4-5 on each side), each a half-inch thick and maybe 4 inches square, bolted to the crankcase. I'm curious what purpose these serve. Obviously they're weights (no other reason for such a huge stack of metal). Two possible reasons come to mind: either they adjust the C of G or they act as mass dampers for the engine to adjust its vibration characteristics.

Any other reasons for a big lump of metal to be bolted to an engine?
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lownslow
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Re: DA40 engine weights

#2 Post by lownslow » Tue Jun 27, 2017 3:55 pm

IIRC, the DA-40 was originally designed for a big, heavy diesel so I suspect those are for CG.
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