Today's Message Index:
----------------------
1. 05:18 AM - Re: polyswitches (Bill Henderson)
2. 06:52 AM - Re: polyswitches (Frans Veldman)
3. 09:42 AM - Re: sanding filler (Robert C Harrison)
4. 12:42 PM - Re: sanding filler (Peter Timm)
5. 02:29 PM - Re: sanding filler (craig bastin)
6. 03:56 PM - Re: Bubble doors (JR Gowing)
7. 09:09 PM - Re: Mixture control (Greg Fuchs)
8. 09:29 PM - Re: polyswitches (Andrew Sarangan)
9. 09:50 PM - Cutting off back of cockpit module (Greg Fuchs)
10. 10:29 PM - Fein saw (Greg Fuchs)
Message 1
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Subject: | Re: polyswitches |
Craig,
For what it's worth, that's what I'm planning on using in my Europa. I've
designed and etched a printed circuit board for the prototype. There's been
a lot of round & round on the use of poly fuses in lieu of circuit breakers,
but I still think this is the best option. Just turn off the power to that
particular fuse for a few second and it's reset. Don't ever have to
replace, and it's simple.
Just my 2 cents worth.
Bill
A010 Monowheel Classic
Building since '95. When will it ever end.....
----- Original Message -----
From: "craig bastin" <craigb@onthenet.com.au>
Sent: Friday, January 09, 2009 7:10 PM
Subject: Europa-List: polyswitches
>
> for those of you up to the electrics stage, i found these
>
>
> http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=2592
>
>
> they look like they might be a good replacement for circuit breakers
>
> craig
>
>
>
Message 2
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Subject: | Re: polyswitches |
craig bastin wrote:
>
> for those of you up to the electrics stage, i found these
>
> http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=2592
>
> they look like they might be a good replacement for circuit breakers
It appears to me that these are PTC-resistors. Downside of these things
are that they will never really cut the power, but remain in such a
state that the heat development is just enough to increase the
resistance enough to remain in some sort of balance. Another problem is
their relatively high resistance. You will loose some voltage over these
things, depending on the amount of current you are asking. Near their
cut-off current, the voltage drop is sufficient to convert some of the
energy into heat, it is the heat which will increase resistance even
further, and that is why there is some limit in the amount of current
you can ask from it.
With other words: These things have no clear on-off states, but
everything in between instead. Depending on your purpose, this is
allowable, or it is not.
It might be an option to power non-trivial small devices through them
(like a GPS) where the current remains significant below the cut-off
current, but I would not use them for, let's say, the fuel pumps, the
flaps, or the radio. In general, all equipment with changing current
demands and higher current demands are unsuitable.
Oh, and you can't instantly reset them. They need to cool down first
after they "tripped". Not bad for your GPS (unless you are in the middel
of an GPS-IFR-approach), but not so smart for the fuel-pumps, flaps, etc.
Actually, I would stay away from them.
Just my 2 cents.
--
Frans Veldman
Message 3
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Hi! Fred.
I don't consider you've really got used to it until you've fallen asleep
during sanding !(sweet dreams!)
Regards
Bob Harrison G-PTAG
Do not archive.
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Fred Klein
Sent: 10 January 2009 06:31
Subject: Europa-List: sanding filler
I can't help but marvel at how well I'm getting to know every square
inch of my little bird as I sand away everything which doesn't look
like a Europa...
I tip my hat to all who've been here...
Fred
A194
do not archive
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Message 4
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Subject: | Re: sanding filler |
Yes, Fred
Ivan Shaw described this as soul destroying. You have to build the classic
wings to really enjoy it.
I have talked to Alex, and he has sorted his problems and has been flying.
Right now he has a health problem
(and a snow problem), but hopes to overcome it in due course.
Have fun.
Peter
----- Original Message -----
From: "Fred Klein" <fklein@orcasonline.com>
Sent: Friday, January 09, 2009 10:30 PM
Subject: Europa-List: sanding filler
>
>
> I can't help but marvel at how well I'm getting to know every square
> inch of my little bird as I sand away everything which doesn't look
> like a Europa...
>
> I tip my hat to all who've been here...
>
> Fred
> A194
>
> do not archive
>
>
> --
> This message has been scanned for viruses and
> dangerous content by MailScanner, and is
> believed to be clean.
>
>
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Message 5
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No NO you have it all wrong....
its a test of worthiness, to weed out those
not worthy of owning a europa :)
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com]On Behalf Of Peter Timm
Sent: Sunday, 11 January 2009 6:41 AM
Subject: Re: Europa-List: sanding filler
Yes, Fred
Ivan Shaw described this as soul destroying. You have to build the classic
wings to really enjoy it.
I have talked to Alex, and he has sorted his problems and has been flying.
Right now he has a health problem
(and a snow problem), but hopes to overcome it in due course.
Have fun.
Peter
----- Original Message -----
From: "Fred Klein" <fklein@orcasonline.com>
Sent: Friday, January 09, 2009 10:30 PM
Subject: Europa-List: sanding filler
>
>
> I can't help but marvel at how well I'm getting to know every square
> inch of my little bird as I sand away everything which doesn't look
> like a Europa...
>
> I tip my hat to all who've been here...
>
> Fred
> A194
>
> do not archive
>
>
> --
> This message has been scanned for viruses and
> dangerous content by MailScanner, and is
> believed to be clean.
>
>
----------------------------------------------------------------------------
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Message 6
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Subject: | Re: Bubble doors |
Bob
You can't take much notice of overall height of your complete body -
Some people have long bodies and others have long legs!
JR (Bob) Gowing UK Kit 327 in Oz
do not archive
----- Original Message -----
From: "Robert Borger" <rlborger@mac.com>
Sent: Monday, January 05, 2009 8:23 AM
Subject: Re: Europa-List: Bubble
>
> Frank,
>
> There must be more foam or other packing in that seat area or
> exceptionally thick seat cushions. I am 6 ft (72 in, 183 cm) tall and
> I do not have any trouble fitting in my XS with standard Europa seat
> cushions. I still have, at a minimum, another 2 in (5 cm) of head
> space.
>
> Work more with those cushions before you go to the trouble of
> replacing the doors/windows.
>
> Check six,
> Bob Borger
> Europa Kit #A221 N914XL, XS Mono, Intercooled 914, Airmaster C/S
> http://www.europaowners.org/N914XL
> (99.999% done) Essentially complete. Running Tests & Final Inspections.
> 3705 Lynchburg Dr.
> Corinth, TX 76208
> Home: 940-497-2123
> Cel: 817-992-1117
>
> On Jan 4, 2009, at 15:06, Frank Kusserow wrote:
>
>> <frank@kusserow-online.com
>> >
>>
>> Dear All,
>>
>> thanks for the Ideas. I cut into the seat base today and found an
>> inch or so of styrofoam which I will remove before I get to the
>> windows (because it might still be not be enough headroom). I am 185
>> cm (73 inches) tall and up to now I barely fit into the cockpit. Is
>> that normal in the "Classic"?
>>
>> Regards from Germany,
>> Frank
>
>
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Message 7
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Terry,
I like the idea of compensating the Bing carbs which would tend to run rich
at high altitudes, anyway.
Are you flying yet? Ie: Have you flown this arrangement, to see how well it
worked, or how much fuel was being saved?
Thanks in advance,
Greg Fuchs, A050
Hi Remi,
We are members of the Experimental Aircraft Association who have built an
'experimental aircraft'. As such, among other things not included in our
standard kit, we have installed a mixture control on our 912S ....snip..
regards,
Terry Seaver
_____
Message 8
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Subject: | Re: polyswitches |
There are pros and cons.
Nothing beats the reliability and speed of fuses, but they are inconvenient
to replace. Circuit breakers are more convenient although less reliable, but
is a happy medium. Polyswitches are useful in unreachable areas, but are
slower to trip and sensitive to ambient temperature.
It depends on what you are trying to protect. If you are trying to protect
your electronics from surges, then polyswitches are probably the least
favorable. Your electronics would probably be fried before the switch trips.
But in mechanical drives and motors they could be ok.
On Sat, Jan 10, 2009 at 9:50 AM, Frans Veldman <frans@paardnatuurlijk.nl>wrote:
> >
>
> craig bastin wrote:
> craigb@onthenet.com.au>
> >
> > for those of you up to the electrics stage, i found these
> >
> > http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=2592
> >
> > they look like they might be a good replacement for circuit breakers
>
> It appears to me that these are PTC-resistors. Downside of these things
> are that they will never really cut the power, but remain in such a
> state that the heat development is just enough to increase the
> resistance enough to remain in some sort of balance. Another problem is
> their relatively high resistance. You will loose some voltage over these
> things, depending on the amount of current you are asking. Near their
> cut-off current, the voltage drop is sufficient to convert some of the
> energy into heat, it is the heat which will increase resistance even
> further, and that is why there is some limit in the amount of current
> you can ask from it.
> With other words: These things have no clear on-off states, but
> everything in between instead. Depending on your purpose, this is
> allowable, or it is not.
>
> It might be an option to power non-trivial small devices through them
> (like a GPS) where the current remains significant below the cut-off
> current, but I would not use them for, let's say, the fuel pumps, the
> flaps, or the radio. In general, all equipment with changing current
> demands and higher current demands are unsuitable.
>
> Oh, and you can't instantly reset them. They need to cool down first
> after they "tripped". Not bad for your GPS (unless you are in the middel
> of an GPS-IFR-approach), but not so smart for the fuel-pumps, flaps, etc.
>
> Actually, I would stay away from them.
>
> Just my 2 cents.
>
> --
> Frans Veldman
>
>
Message 9
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Subject: | Cutting off back of cockpit module |
To list,
When I was marking the cockpit module for cutting a long time ago, it seemed
like the scribe lines at the sides of the module (near the back end) went up
in an angled, circular fashion as seen in the picture. I assume that most
people cut the scribe line parallel to the (already cut)opening. Did anyone
see it like I did, and cut the way I have it marked? An advantage of cutting
it that way would be that it would give more surface area for the glue to
hold the CP module to the fuselage, in that area.
Regards,
Greg
The extra picture: be careful who comes in to the hangar (and lurks in wait)
to watch you build! It is hard to tell from the picture, but 'it' was a
pretty good size, or at least a runner up. Last years winner had black and
white colored hairs all around its legs and body. I had difficulty getting
pictures of him. He seemed to know that I was on to him. Both have met their
makers :)
Message 10
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The Fein saw is an oscillating saw which seems to cut through many hard
surfaces, including fiberglass. When it appeared on a TV commercial, I
wanted to buy this saw to try on the Europa, until the large price tag ( I
think it was around $350 US dollars, or so. Ian Rickard discussed this saw
on page 12 of the December issue of The Europa Flyer.
I noticed that there is a knock-off of this saw at Harbor Freight. It is new
to them, and appeared in the adds over Christmas on sale for 39.99 (down
from 49.99). If anyone has tried this saw to check its reliability/working,
let me know. Meanwhile, I am in no hurry, and waiting for it to go on sale
again.
Thanks,
Greg Fuchs A050
Do not archive
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