Today's Message Index:
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0. 01:02 AM - PLEASE READ - Matronics Email List Fund Raiser During November! (Matt Dralle)
1. 03:00 AM - BRS (Wladimir Kummer)
2. 04:32 AM - Re: BRS (davidjoyce@doctors.org.uk)
3. 04:43 AM - Re: BRS (rampil)
4. 11:02 AM - Post Curing Adventures (Fred Klein)
5. 12:23 PM - Trigear battery (Alex Kaarsberg)
6. 01:31 PM - Re: Trigear battery (Alan Burrill)
7. 02:57 PM - Autopilot Servos (William Daniell)
8. 07:57 PM - Re: Post Curing Adventures (Kevin Klinefelter)
Message 0
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| Subject: | PLEASE READ - Matronics Email List Fund Raiser During November! |
Dear Listers,
Each November I hold a PBS-like fund raiser to support the continued operation
and upgrade of the Email List and Fourm Services at Matronics. It's solely through
the Contributions of List members (you) that these Matronics Lists are possible.
You have probably noticed that there are no banner ads or pop-up windows on any of the Matronics Lists or related web sites such as the Forums site http://forums.matronics.com , Wiki site http://wiki.matronics.com , or other related pages such as the List Search Engine http://www.matronics.com/search , List Browse http://www.matronics.com/listbrowse , etc. This is because I believe in a List experience that is completely about the sport we all enjoy - namely Airplanes and not about annoying advertisements.
During the month of November I will be sending out List messages every couple of
days reminding everyone that the Fund Raiser is underway. I ask for your patience
and understanding during the Fund Raiser and throughout these regular messages.
The Fund Raiser is only financial support mechanism I have to pay all
of the bills associated with running these lists. YOUR personal Contribution
counts!
This year we have a really HUGE and TERRIFIC line up of free gifts to go along
with the various Contribution levels. In fact, there are over 30 different gifts
to choose from - more than we've ever had before! There's something for everyone,
to be sure. Most all of these gifts have been provided by some of the
vary members and vendors that you'll find on the Matronics Lists and they have
been either donated or provided at substantially discounted rates.
This year, these generous members include:
Andy Gold of the Builder's Bookstore http://www.buildersbooks.com
These are very generous guys and I encourage you to visit their respective web
sites. Each one offers a unique and excellent aviation-related product line.
I would like publicly to thank Andy, Bob, Corbin, George, and Jon their generous
support of the Lists again this year!!
Please make your List Contribution using any one of three secure methods including
using a credit card, PayPal, or by personal check. All three methods afford
you the opportunity to select one of this year's free gifts with a qualifying
Contribution amount!!
To make your Contribution, please visit the secure web site:
http://www.matronics.com/contribution
I would like to thank everyone in advance for their generous financial AND moral
support over the years!
Thank you!
Matt Dralle
Matronics Email List Administrator
RV-4/RV-6/RV-8 Builder/Rebuilder/Pilot
Message 1
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Nice to have this wealth of knowledge! Thanks fellows. Now have to concentrate
in building as light as possible.
With lightness in mind do you guys have any advice about making it lighter?
Wladimir
Europa XS MG Kit
Joinville - SC - Brazil
Message 2
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Wladimir, The range of Europa ready for service weights runs from
roughly 800 to 950 lbs with the (LAA) max AU limit of 1370lbs that
leaves you with anywhere between 570 and 420lbs. 570 allows full fuel
(around 115lbs), 80lbs luggage and 375lbs crew, that is two guys of
around 13 stone/83kg. If you are on the wrong end of the weight spectrum
your options are much more limited, quite apart from the degradation in
performance and safety margins. My tips for keeping it light would be:
1. Get your fibreglass work supervised by an expert, who will tell you
the optimum, relatively dry resin/cloth ratio and probably insist on you
using peelply on all lay ups. Extra resin makes the result weaker!
2. Think critically about all equipment - do you actually need it? Is
there a lighter alternative? Luxurious leather upholstery and coach
lining should be viewed with deep suspicion!
3. Kit it out with electronic instruments rather than steam age ones -
much lighter as well as better suited to 21st century.
4. Be very critical about the paint system. Multiple layers of filler,
undercoat UV protection & top coats can weigh a substantial amount.
check out how many cans of each are estimated to be needed and do the
weight calculation. Almost certainly a professionally applied gelcoat
(which needs no undercoat or UV protection coat, and half of which is
taken off in the rubbing down process) will be significantly lighter,
quite apart from producing the perfect finish. Don't paint hidden
surfaces (aileron close outs & wing root areas)
5. Be critical about the length of bolts you use - they only need to be
just in safety - 2 threads showing
6. Aim if poss to have your battery over the passenger footwell - much
reduced length of heavy wire, & minimal battery box construction. Use a
lighter modern battery such as an Odyssey.
Best of luck, David Joyce, GXSDJ (914/ MONO/Woodcomp SR300W with very
full panel & autopilot + gelcoat finish, weighing in at 837lbs)
On 2015-11-01 10:59, Wladimir Kummer wrote:
>
> Nice to have this wealth of knowledge! Thanks fellows. Now have to concentrate
in building as light as possible.
>
> With lightness in mind do you guys have any advice about making it lighter?
>
> Wladimir
> Europa XS MG Kit
> Joinville - SC - Brazil
>
Links:
------
[1] http://www.buildersbooks.com
[2] http://www.matronics.com/contribution
[3] http://www.matronics.com/Navigator?Europa-List
[4] http://forums.matronics.com
Message 3
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"With lightness in mind do you guys have any advice about making it lighter?
Wladimir"
Allow me to pass along some advise I received (as part of a crowd) from
Burt Rutan:
In the course of building your aircraft, you may be tempted to add devices
or materials not specified in the plans. To test such materials, place them
in your palm. Sharply accelerate your hand vertically towards the sky. If
performed properly, the material or device will depart your hand skyward.
If the material falls back to earth, it is too heavy, do not add it to your
aircraft!
Bom Dia!
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=448515#448515
Message 4
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| Subject: | Post Curing Adventures |
Although my mantra of all things aviation is ...to manage the degree of novelty...,
my shortcomings as a manager were revealed recently when I attempted to post
cure my custom made cowlings which Id made using a special high temperature,
fire-retardant resin.
The specsverified via email confirmation w/ the manufacturercall for a robust post
curing protocol:
1 hr @ 150 degrees F., 1 hr @ 200, 1 hr @ 250, 1 hr @ 300, and 2 hrs @ 350 degrees
Fessential for achieving the (presumably desirable) hi temp & fire-retardant
attributes.
A pal who hand builds bicycles has a suitable oven used for powder coating which
has the requisite temp. range, controls, monitoring, and built-in timers complete
w/ red lights and loud buzzers.
Nonetheless, halfway thru the cycle, after finding large blisters, deformation,
and some evidence of delamination, I promptly shut down the oven and removed
my top cowl.
Based on the pattern of blisters and deformation, its apparent that the Last-A-Foam
stiffeners on the cowls interior did not take kindly to the high temperatures
during post curebut the truth is, I dont really care what caused the damagemy
goal is to salvage the cowl and continue reducing the number of days between
today and first flight.
As for post-curing my cowls, I am content w/ the notion that the heat generated
by the engine & exhaust will suffice.
Fred
Message 5
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One possible way of using what you have in a more efficient way, could be to place
the ships' battery in the wheel tunnel in a sturdy enough moveable cage, adjustable
in flight.
Any observations/thoughts on this??
Brgds,
Alex Kaarsberg
> On 01/11/2015, at 10:43, rampil <ira.rampil@gmail.com> wrote:
>
>
> "With lightness in mind do you guys have any advice about making it lighter?
> Wladimir"
>
> Allow me to pass along some advise I received (as part of a crowd) from
> Burt Rutan:
>
> In the course of building your aircraft, you may be tempted to add devices
> or materials not specified in the plans. To test such materials, place them
> in your palm. Sharply accelerate your hand vertically towards the sky. If
> performed properly, the material or device will depart your hand skyward.
> If the material falls back to earth, it is too heavy, do not add it to your
> aircraft!
>
> Bom Dia!
>
> --------
> Ira N224XS
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=448515#448515
>
>
>
>
>
>
>
>
>
>
Message 6
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| Subject: | Re: Trigear battery |
The CofG on a trigear does not move that much in flight to warrant the complication
and weight of such a modification.
I'd stick the battery on the firewall or rear compartment in the luggage bay dependent
on the Build and the equipment fitted.
My battery is on the firewall and that's just fine.
Alan
G-OBJT
Sent from my iPad
> On 1 Nov 2015, at 20:22, Alex Kaarsberg <kaarsberg@terra.com.br> wrote:
>
>
> One possible way of using what you have in a more efficient way, could be to
place the ships' battery in the wheel tunnel in a sturdy enough moveable cage,
adjustable in flight.
> Any observations/thoughts on this??
>
> Brgds,
>
> Alex Kaarsberg
>
>> On 01/11/2015, at 10:43, rampil <ira.rampil@gmail.com> wrote:
>>
>>
>> "With lightness in mind do you guys have any advice about making it lighter?
>> Wladimir"
>>
>> Allow me to pass along some advise I received (as part of a crowd) from
>> Burt Rutan:
>>
>> In the course of building your aircraft, you may be tempted to add devices
>> or materials not specified in the plans. To test such materials, place them
>> in your palm. Sharply accelerate your hand vertically towards the sky. If
>> performed properly, the material or device will depart your hand skyward.
>> If the material falls back to earth, it is too heavy, do not add it to your
>> aircraft!
>>
>> Bom Dia!
>>
>> --------
>> Ira N224XS
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=448515#448515
>
>
>
>
>
Message 7
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| Subject: | Autopilot Servos |
I am fiddling around trying to work out where to put the Dynon autopilot
servos.
I definitely don't want to get into the major surgery of the official mod.
Someone - sorry i forget who sent me a very pretty installation in the rear
fuselage just behind the baggage bay.
Unfortunately I have rather a lot of stuff just in that location...fuel
lines and wires etc.
I was just about to reinforce the rear fuselage and built a bridge over the
rudder cable and then connect teh servo to the torque tube with ah bracket
when I thought Id just ask the assembled wisdom. My feeling was the the
fuselage floor is kinda weak and the torque tube also quite thin
walled...which made me think about lateral loads on the torque tube.
Is there a downside to putting the servos in the cabin linked to the joint
at the base of the joystick?
I have a lot of space under my legs . I built a reclined seat in order o
fit my 6'4" under the door. Apart from the obvious issue of stepping on
them which I would guess that one can deal with by putting them in a box is
there a downside to this? Do the servos need cooling for example?
Many thanks
Will
William Daniell
LONGPORT
+57 310 295 0744
Message 8
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| Subject: | Re: Post Curing Adventures |
Go Fred go!
Kevin
> On Nov 1, 2015, at 9:01 AM, Fred Klein <fklein@orcasonline.com> wrote:
>
>
> Although my mantra of all things aviation is ...to manage the degree of novelty...,
my shortcomings as a manager were revealed recently when I attempted to
post cure my custom made cowlings which Id made using a special high temperature,
fire-retardant resin.
>
> The specsverified via email confirmation w/ the manufacturercall for a robust
post curing protocol:
> 1 hr @ 150 degrees F., 1 hr @ 200, 1 hr @ 250, 1 hr @ 300, and 2 hrs @ 350 degrees
Fessential for achieving the (presumably desirable) hi temp & fire-retardant
attributes.
>
> A pal who hand builds bicycles has a suitable oven used for powder coating which
has the requisite temp. range, controls, monitoring, and built-in timers complete
w/ red lights and loud buzzers.
>
> Nonetheless, halfway thru the cycle, after finding large blisters, deformation,
and some evidence of delamination, I promptly shut down the oven and removed
my top cowl.
>
> Based on the pattern of blisters and deformation, its apparent that the Last-A-Foam
stiffeners on the cowls interior did not take kindly to the high temperatures
during post curebut the truth is, I dont really care what caused the damagemy
goal is to salvage the cowl and continue reducing the number of days between
today and first flight.
>
> As for post-curing my cowls, I am content w/ the notion that the heat generated
by the engine & exhaust will suffice.
>
> Fred
>
>
>
>
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