Hi! Shaun/All
Not such a dumb thought either! Although my steed has a 3300 Jabiru I began
to have difficulty fitting the lower cowling , close inspection showed that
due to static load the top engine mounts were distressed due to the manual
not recognising that the static load was likely to cause the engine back
plate to exit the male portion of the rubber mount. This was fixed by simply
turning the assembly round. Oddly enough the distress didn't show when there
was 4.5G of test weight loaded on top of the engine but with vibration it
became a different matter.
On the question of "Gear Up Landings" I was given to understand that someone
(Test Pilot ! "no names, no pack drill") who tested the first 2200 Jabiru in
a Mk1 Europa managed to do just that! So length of experience makes little
difference !
Regards
Bob Harrison G-PTAG .
> -----Original Message-----
> From: owner-europa@aztec.houxou.com
> Subject: Re: Exhaust sytem movement
>
>
> Just a dumb thought - how many hours do you have on the engine?
> Perhaps the
> engine mounts have compressed and the engine has sagged slightly. 5mm is
> not much at all...
>
> Shaun Simpkins
> A207
> ----- Original Message -----
> From: <BRYNALL@aol.com>
> Subject: Re: Exhaust sytem movement
>
>
> > To Roger Mills,
> >
> > Roger,
> >
> > I recalled what you said to me about exhaust unit securing nuts
> from when
> we
> > last met. That was what made me have a closer look at the
> problem on this
> > service. Thanks!
> >
> > The problem is that the silencer has dropped away from the
> engine since I
> > originally built it? With the XS there is an aluminium sheet metal duct
> > fitted under the silencer which ducts cooling air to the
> underslung Water
> and
> > oil coolers. We are instructed to engineer a 5mm clearance between the
> > silencer and the aluminium. As the silencer has sunk it has
> taken up this
> > clearance. No matter how I try to reconfigure the pipes, the
> silencer, and
> > the nuts I cannot re establish this clearance.
> >
> > It is almost as though the rear pipes have grown or sagged. I suppose it
> is
> > possible if the pipes get to be really hot, and the silencer provides
> weight
> > and a vibratory factor, GS did tell me once that the Exhaust pipes glow
> red
> > in service. That would be enough for stress relieving movement I quess.
> >
> > Fortunately I can lower the duct surface by a few mm to recreate the
> > clearance, but it would be nice to know how common the problem is, or if
> > there are any other thoughts and solutions. Or does carry on
> growing over
> the
> > years untill it eventually appears through the bottom of the cowling?:)
> >
> > Best regards Bryan
> >
>
>
|