Svein,
If I had to do mine al over again I would not have used the splash
molding to make the NACA vent on the top. I would have like others
brought the intake air up from the bottom NACA inlet that the 914 uses.
Some have created a plenum that covers the top of the air box that a 2
inch scat tube can attach too from the lower inlet. The splash molding
is unnecessary and if you do want an inlet on the top you can make it
easier by simply cutting the opening shape of the inlet but not the
forward narrow part. Just push it down about an inch in the back and
bid over it from underneath. Thats what flight crafters does. They
throw away the splash molding. Which I find amusing as Europa charged
me $200 for the thing. I was one of the few that had to receive the FWF
parts separate. If you did use the underneath NACA it would allow you
to use a bypass valve to draw under the cowl air that could serve as
carb heat. A builder in Canada has done this with great results. Hope
this helps.
Jeff
A258
Finished priming all flying services. Stalled now as business is
booming.
On Nov 8, 2004, at 3:40 PM, Sidsel & Svein Johnsen wrote:
> <sidsel.svein@oslo.online.no>
>
> I downloaded Issue 2 of the 912/912S installation manual from the
> Club's
> members' section today, to see if it contains any improvements over
> Issue 1
> which came with my Firewall Forward kit in 2001. It does, but it also
> leaves me quite confused and concerned:
>
> On p. 7-3 it says: "The Rotax 912S engine is provided with a glass
> fibre
> cowl around the cylinders to ensure that sufficient cooling air reaches
> them", and then goes on to describe how to make the additional air
> inlet for
> this cowl by using a "splash" moulding. My 912S (delivered by Europa
> in
> Lakeland in 2001) does NOT have this glass fibre cowl, but the FF kit
> HAS
> the splash moulding!
>
> The 912S installation instructions from Rotax (came with the engine)
> does
> not mention anything regarding the cylinder cowl, and does not show it
> on
> any of the engine drawings, either.
>
> Can anyone explain this? Do I have an older version of 912S than what
> Issue
> 2 of the factory's manual refers to (serial no. 4426924)? Is the
> cylinder
> cowl required/recommended? Is it a Rotax part or from Europa?
>
>
> Regards,
> Svein
> A225 - now in Norway
>
>
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