Today's Message Index:
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1. 12:57 AM - Dynon D10 Remote compass Position (colin smallwood)
2. 02:07 AM - Re: Dynon D10 Remote compass Position (josok)
3. 02:22 AM - Re: Dynon D10 Remote compass Position (Raimo Toivio)
4. 02:55 AM - Re: Dynon D10 Remote compass Position (Trevpond@aol.com)
5. 03:20 AM - Re: Dynon D10 Remote compass Position (colin smallwood)
6. 03:33 AM - Fuel tank expansion (Sidsel & Svein Johnsen)
Message 1
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| Subject: | Dynon D10 Remote compass Position |
Hi All
Help please!
Finally calibrating the DI on my D10.To save laptops
in flight the remote compass is to be installed
Any one fitted the remote compass and if so where
was the optimum position? Thanks in anticipation
Regards
Colin Smallwood G-DEBR
Message 2
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| Subject: | Re: Dynon D10 Remote compass Position |
I stuck mine in the ceiling. There are no current carrying wires or hardware in
the vicinity. Afterward i found out, that the headphones can come too close.
Sop if you put it there, put it as far back as possible, so that your headphone
will always be at at least a foot away,
Regards,
Jos Okhuijsen
Visit - www.EuropaOwners.org
Message 3
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| Subject: | Re: Dynon D10 Remote compass Position |
Colin,
I am not sure if it was The Optimum Pos,
but anyway I installed it (Dynon remote compass)
behind the D-panel under the stabilator tube (middle).
Under the remote compass I made a special aluminium bracket
which was both ways *absolutely* levelled when the plane was supported
to the flevel flight position.
I glued it to the floor by Sica mass.
The remote compass is fixed to the bracket w Nylon screws and nuts
- so no any magnetic metal near by. Nylon screws are positioned such a
way that it is possible to make some minor adjustments to reposition the
remote compass.
Seems to work well. If necessary I can take a pic and send it to you.
BTW my Dynon=B4s OAT sensor is located far behind the remote compass.
Raimo
----- Original Message -----
From: colin smallwood
To: matronics
Sent: Wednesday, May 14, 2008 10:53 AM
Subject: Europa-List: Dynon D10 Remote compass Position
Hi All
Help please!
Finally calibrating the DI on my D10.To save laptops
in flight the remote compass is to be installed
Any one fitted the remote compass and if so where
was the optimum position? Thanks in anticipation
Regards
Colin Smallwood G-DEBR
Message 4
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| Subject: | Re: Dynon D10 Remote compass Position |
Hi Colin,
Mine is in the roof between the doors, obviously facing fore and aft and
works perfectly.
regards
Trev Pond
G-LINN
Message 5
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| Subject: | Re: Dynon D10 Remote compass Position |
Jos
Thanks for the info
Colin
do not archive
----- Original Message -----
From: "josok" <josok-e@ukolo.fi>
Sent: Wednesday, May 14, 2008 10:02 AM
Subject: Re: Europa-List: Dynon D10 Remote compass Position
>
> I stuck mine in the ceiling. There are no current carrying wires or
> hardware in the vicinity. Afterward i found out, that the headphones can
> come too close. Sop if you put it there, put it as far back as possible,
> so that your headphone will always be at at least a foot away,
>
> Regards,
>
> Jos Okhuijsen
>
>
> Visit - www.EuropaOwners.org
>
>
> --
> Checked by AVG.
> 13/05/2008 19:55
>
>
Message 6
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| Subject: | Fuel tank expansion |
I see that steps are taken by several builders to allow the fuel tank to
expand and not be "glued" to the front and back of the cockpit module by
the bid layups described in the Builder's Manual.
I do not wish to pass any judgement on the possible benefits, but there
are some issues that I think should be considered:
- Judging from my own tank's bulging (not yet critical) and photos seen
of others, I have no doubt that the thinner parts of the tank (e.g. tank
walls) expand at least 15%.
- If the tank's overall dimensions also were to expand this much, there
is far from enough space available for it to expand - it would begin
pushing on the cockpit module and side/bottom skin and of the fuselage
long before it had finished its expansion.
- So, on the installations made as per the BM, why has not this
happened? Is it because the tank is "glued" to the bid layups? Most
probably not - epoxy does not bind well to the tank material, we have
learned.
- I think the reason is that the tank's overall dimensions do not expand
much, if any. The material is permeable, but not porous to the extent
that it leaks. Fuel (or certain components of the fuel) gets into the
material, but if the material is thick enough, this ingress (for the
lack of a better word) stops. Thick material therefore acts as a brake
on the expansion - the thicker it is, the less it expands. All edges of
the tank are considerably thicker than the panels, and my theory is that
the tank therefore holds itself effectively within or very close to
within its original dimensions. On my tank, there is no sign that the
original edge between the tank bottom (including the saddle) and the
tank front panel has changed shape at all, nor expanded.
- Making "non-glued" contact between the tank and the bid layups cannot
cause any harm, I believe, provided the tank is not permitted to move
outside its allocated "box" in the cockpit module. When I built my
plane, I had heard that the tank would not be "glued" in place in the
long term. I did not find the spacers per the BM to be sufficient to
take up any considerable load (they would sit against a soft, thin tank
panel only), should the tank slide forward at the bottom. I therefore
installed additional spacers further down, going up against the
bottom/front panel edge. I did not note what clearance I had originally
(not many millimeters), but the tank edge is now touching the spacers on
both sides (but not bulged around them). Whether this is caused by
slippage of the bond that originally existed between the tank material
and the epoxy in the bid layups, or tank expansion caused by the fuel,
is unknown. These spacers are, however, a very effective stop against
any forward movement of the lower part of he tank as a whole. See
attached photos. It should be possible to fit something similar on
existing aircraft - probably made of three parts: one glued up against
the cockpit module in front, one held against the tank in the back while
a thin wedge with glue is driven lightly in between.
As always when it does not come from an expert - take this with a
healthy dose of salt!
Regards,
Svein
LN-SKJ
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