Hi,
I used to fly microlight aircraft (powered by Rotax engines) and suffered
---From the same noise problem - irritating high rev frequencies.. We ended up
using ANR headsets which make a big difference to the problem. The only
thing to mention is that different makes of ANR damp out different
frequencies. If you intend to opt for this solution, try and find a supplier
who will allow you to try out a few makes before taking the plunge.
The ones we used to use were by Skyforce - but they are not made anymore.
Carl Pattinson.
----- Original Message -----
From: Rob Waters <robw@iprolink.co.nz>
Subject: Re: The dreaded Rotax? New builder questions
> Shaun,
>
> >From my limited experience in Europas fitted with both the 912 and the
> 912S, it's my opinion that the 912S is a harsher engine, ie: more
> vibration, particularly at some engine rev bands. I don't know that
> there was any difference in noise level however. I haven't flown in a
> 914 powered Europa to compare, but I think that there is something in
> what you say regarding the high RPM engines. I read a review on the Ban
> Bi MCR01 where 2 aircraft were flown on the same day. One was powered by
> a 912 and the other by a lower revving direct drive JPX engine. The
> reviewer commented that the JPX was noticeably quieter.
>
> Rob Waters
>
> Shaun Simpkins wrote:
>
> > A very common complaint I've gleaned from this BB is that the Rotax
> > has a particularly irritating engine note, owing to the 5000RPM
> > typical operating speed of the engine. Can any BB members that have
> > attempted alternative engines to the Rotax confirm this suspicion?
>
>
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