Today's Message Index:
----------------------
1. 01:17 AM - Fw: Re: XS Fuel Tank (John Wighton)
2. 02:04 AM - XS Fuel Tank Kiwi Mod (Tony Renshaw)
3. 02:55 PM - Autopilot (David Park)
4. 03:02 PM - Test (david park)
5. 03:40 PM - Re: Autopilot (Rob Housman)
6. 03:40 PM - Re: XS Fuel Tank Kiwi Mod (Fred Klein)
7. 04:30 PM - Re: Strobe system (richard)
8. 10:12 PM - Instrument Panel Studs, and US supplier of small hardware items. ?? (Tony Renshaw)
9. 11:24 PM - Instrument panel bolts (Fred Klein)
Message 1
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| Subject: | Re: Fwd: Re: XS Fuel Tank |
Great job on the tank. It looks excellent and gives a useful increase in volume.
How do you intend to prove it complies with the requirements? I note the pictures
show a test rig, possibly for functional tests? The tank will need to be
pressure tested, easily achieved using a long tube and a calculated head of liquid
(please use water for the test and remember to recalculate for the higher
density).
The larger volume will need the basic static strength calculations to be revisited.
Hhigher inertia loads and different CG location will alter the loads being
carried by the forward structure.
What is the weight of the bare tank?
I dont know where your project is based, for builders in the UK this would definitely
be classified as a modification.
Regards
JW
--------
John Wighton
Europa XS trigear G-IPOD
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=420880#420880
Message 2
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| Subject: | XS Fuel Tank Kiwi Mod |
John,
Bill and Sue's work is truly commendable and worthy of our praise. My 2 cents worth
are:
With the tank being contained within the same space, all your points of concern
I believe are somewhat a dampener, a bit pedantic,
and academic, but pertinent to UK builders I suppose. I am only too glad that I
dont build in the UK where the absence of an Experimental category denies common
sense addressing of genuine problems. You guys really need to lobby for an
experimental category! If the replacement of a flexible brittle tank prone to
causing quite a few of our builders distress, luckily sofar only on the ground,
in the same position relative to CoG and attachment wise, causes you distress,
move your project downunder, or over the pond is my suggestion. Leave the
bureaucracy behind and we'll happily accept you ;-)
Tony R
Across the pond from our Kiwi mates.
P.S. By way of an example, the stresses at points of attachment, the module, is
capable of supporting the ultimate fail safe load far in excess
of our 4G limit. 15 kg of additional fuel supported on the back of that same bulkhead
is academic in my opinion. Its even a bridged load, shared with the roof
of the pitch pushrod tunnel aft of the rear footwells, as I call them.
> On 23 Mar 2014, at 19:17, "John Wighton" <john@wighton.net> wrote:
>
>
> Great job on the tank. It looks excellent and gives a useful increase in volume.
>
> How do you intend to prove it complies with the requirements? I note the pictures
show a test rig, possibly for functional tests? The tank will need to be
pressure tested, easily achieved using a long tube and a calculated head of
liquid (please use water for the test and remember to recalculate for the higher
density).
>
> The larger volume will need the basic static strength calculations to be revisited.
Hhigher inertia loads and different CG location will alter the loads being
carried by the forward structure.
>
> What is the weight of the bare tank?
>
> I dont know where your project is based, for builders in the UK this would definitely
be classified as a modification.
>
> Regards
> JW
>
> --------
> John Wighton
> Europa XS trigear G-IPOD
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=420880#420880
>
>
>
>
>
>
>
>
>
>
Message 3
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Does any know where I can obtain a CS36 Actuator arm for a Trutrak autopilot as
described in Mod.75?
Dave Park
Sent from my iPad
Message 4
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Test
Sent from my iPad
Message 5
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I do not have an extra CS36, but since I had to fabricate one I can provide
a SolidWorks solid model and Alphacam CNC file for your use, if you have
either a machine shop or a friendly local machinist handy. My design is for
exactly mating parts useful for a retrofit, without the kerf resulting from
cutting the Europa part.
Best regards,
Rob Housman
Irvine, California
Europa XS
Rotax 914
S/N A070
Airframe complete
Avionics in progress
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of David Park
Sent: Sunday, March 23, 2014 2:54 PM
Subject: Europa-List: Autopilot
Does any know where I can obtain a CS36 Actuator arm for a Trutrak autopilot
as described in Mod.75?
Dave Park
Sent from my iPad
Message 6
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| Subject: | Re: XS Fuel Tank Kiwi Mod |
On Mar 23, 2014, at 2:04 AM, Tony Renshaw <tonyrenshaw268@gmail.com>
wrote:
> all your points of concern I believe are somewhat a dampener, a bit
pedantic,
well said Tony=85F.
Message 7
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| Subject: | Re: Strobe system |
Hi Frank
First off follow the old saying "Keep it simple", why four? I have been
flying my europa for 18 months and have not felt the need to increase the
number of xenon strobe lights from the one I have on the tail fin. Having
stated that, as I fly out of a very busy airfield with only an information
service I think I will fit landing light at some time, not so as to see at
night but to show a clear intention that I am planning to land.
A warning though we have landing lights fitted on to our Euro Fox glider tug
and all the pilots use them on approach, they were changed recently for leds
and they were found to emit a lot of RF noise which required one of the
clubs electronic wizards fix.
Best of luck
Richard
-----Original Message-----
From: spcialeffects
Sent: Thursday, March 20, 2014 8:55 AM
Subject: Europa-List: Strobe system
Looking round for a strobe system and well done lots of reading, looked at
lots of different systems and am still confused. I want 4 strobes, 1 per
wing, fin and belly. I wanted to use an LED system and found X1100
Hide-A-LED Modules which if I have understood correctly can be linked up
with up to 20 led's and doesn't require a big power pack as this is built
into each of the leads coming from the LED itself including multi flash
option and they boast 1100+ lumens BUT I have read some reviews from people
who bought them and they aren't impressed saying they are not all that
during daylight and not that bright. Then I thought well just stick to the
normal xenon tube style. Once again building an aircraft is most defiantly a
learning curve AND a very personal thing so my questions are what are people
using, xenon or led, do you wish you had the other? If you were or are still
building what advice would you have given yourself in regards to wiring,
positioning (fin or fuselage)!
. Thanks one and all, Frank .
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=420655#420655
-----
No virus found in this message.
Checked by AVG - www.avg.com
Message 8
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| Subject: | Instrument Panel Studs, and US supplier of small hardware |
items. ??
Gidday,
Im stuck and was hoping someone could resurrect my momentum. I need to know how
long to make my instrument panel studs to accommodate a washer, possibly conical,
and probably only on the cockpit side, as the other side should use either
metal or phenolic washers. This means I am having permanent studs out the back
of the panel, going through the firewall, and being secured on the engine compartment
side of the firewall. Im going to use AN3 bolts, with their heads Reduxed
onto the brackets I have incorporated into the internal flange over the
top and along the bottom horizontal edge of the back of the panel. Sourcing of
appropriate and recommended suppliers for these washers appreciated, as I dont
seem to easily be able to source them at home.
Lastly, I was going to research the US supplier for all sorts of small bits and
pieces of hardware, but I cant remember it for the life of me, nor can my brains
trust.
Thanks.
Regards
Tony Renshaw
Sydney Aussie.
Message 9
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| Subject: | Instrument panel bolts |
<tonyrenshaw268@gmail.com>
>
> Gidday,
>
> I=92m stuck and was hoping someone could resurrect my momentum. I need
to know how long to make my instrument panel studs to accommodate a
washer, possibly conical, and probably only on the cockpit side, as the
other side should use either metal or phenolic washers. This means I am
having permanent studs out the back of the panel, going through the
firewall, and being secured on the engine compartment side of the
firewall.
Tony=85to get the benefit of vibration isolation, the SS 1/4=94 dia.
McMaster-Carr vibration damping sandwich mounts do the trick=85much
better IMO than any kind of a thru bolt...see cat. pg.:
http://www.mcmaster.com/#vibration-damping-sandwich-mounts/=r882gh
...photo below shows the male threaded stud each side, and there is also
a male / female style, 3 of which I used on the picnic tray STBD side
along w/ SS machine screws and finish washers.
I found the 1/2=94 long studs to be just long enough to penetrate the
firewall and to have room for a washer and stiff nut. Although a
stickler will notice that I lack the requisite visible threads beyond
the face of the nut, I do not consider that to be critical in this
instance.
Fred
DSCN0961.JPG
DSCN0964.JPG
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