Today's Message Index:
----------------------
1. 12:37 AM - Re: RE : roll trim tab and servo installation (Jac van Heeswijk)
2. 02:51 AM - Fw: trailers (Mr Smallwood)
3. 04:43 AM - trailers (Mr Smallwood)
4. 04:57 AM - Re: RE : roll trim tab and servo installation (Bill Henderson)
5. 05:20 AM - Re: RE : roll trim tab and servo installation (John & Amy Eckel)
6. 05:57 AM - cowlings (Graham Singleton)
7. 06:08 AM - Re: RE : roll trim tab and servo installation (Michael Grass)
8. 07:35 AM - Re: filler (Neville Eyre)
9. 07:47 AM - Re: RE : roll trim tab and servo installation (John & Amy Eckel)
10. 08:16 AM - Re: RE : roll trim tab and servo installation (Bill Henderson)
11. 11:16 AM - Re: RE : roll trim tab and servo installation (n3eu@comcast.net)
12. 11:50 AM - Re: filler (JohnDHeykoop@aol.com)
13. 12:52 PM - Re: filler (Jeff Roberts)
14. 01:05 PM - Re: filler (James Nelson)
15. 01:13 PM - Re: filler (Ami McFadyean)
16. 02:12 PM - Re: RE : roll trim tab and servo installation (Michael Grass)
17. 02:26 PM - Re: filler (paul stewart)
18. 05:17 PM - Spar guide (Alan Stills)
19. 06:32 PM - Re: GPSpecial (Jim Puglise)
20. 07:36 PM - Re: RE : roll trim tab and servo installation (n3eu@comcast.net)
21. 09:19 PM - Re: RE : roll trim tab and servo installation (Michael Grass)
Message 1
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| Subject: | Re: roll trim tab and servo installation |
--> Europa-List message posted by: "Jac van Heeswijk" <jac.vanheeswijk@hetnet.nl>
Wim, ik weet niet of het je interesseert, ik weet trouwens ook niet of jij
zelf de dagelijkse discussies op dit forum volgt, maar ik kwam vandaag dit
bericht tegen. Zou wel eens interessant voor jou kunnen zijn. Doe er je
voordeel mee en laat eens weten of je ook zelf regelmatig dit forum volgt.
Groeten, Sjaak.
----- Original Message -----
From: "Bob Jacobsen" <jacobsenra@hotmail.com>
Subject: Re: RE : Europa-List: roll trim tab and servo installation
> --> Europa-List message posted by: "Bob Jacobsen" <jacobsenra@hotmail.com>
>
> Michel,
>
> The servo of chioce is a Hitec HS-645MG. It is small, extremely powerful
> and has an alloy gear train and ball bearings.
>
> Thanks for the nice comments on the web site - I was up flying today and I
> still can't get over just how fantastic and fun to fly my plane is.
>
> Are we having FUN yet?!
>
> Bob Jacobsen
> A131
>
>
> >From: "Auvray" <m.auvray@aerodyne-int.com>
> >Reply-To: europa-list@matronics.com
> >To: <europa-list@matronics.com>
> >Subject: RE : Europa-List: roll trim tab and servo installation
> >Date: Tue, 11 Nov 2003 14:42:59 +0100
> >
> >--> Europa-List message posted by: "Auvray" <m.auvray@aerodyne-int.com>
> >
> >Hello Bob
> >Congratulations for your web site and Aicraft they are beautiful.
> >What servo model do you used for the aileron?
> >
> >Thanks
> >Michel Auvray Classic monowheel N145-220 hours(to day)
> >
> > --|--
> >--------(*)--------
> >
> >Michel AUVRAY
> >
> >
> >-----Message d'origine-----
> >De : owner-europa-list-server@matronics.com
> >[mailto:owner-europa-list-server@matronics.com] De la part de Bob
> >Jacobsen
> >Envoy : mardi 11 novembre 2003 02:04
> > : europa-list@matronics.com
> >Objet : Re: Europa-List: roll trim tab and servo installation
> >
> >
> >--> Europa-List message posted by: "Bob Jacobsen"
> >--> <jacobsenra@hotmail.com>
> >
>
> Compare high-speed Internet plans, starting at $26.95.
> https://broadband.msn.com (Prices may vary by service area.)
>
>
Message 2
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--> Europa-List message posted by: "Mr Smallwood" <ctsmallwood@onetel.net.uk>
----- Original Message -----
From: Mr Smallwood
Subject: trailers
Hi All
Just collected my new tri gear trailer.(Mono design in process)
Main points Excellent Quality in design and M/F.Circa =A31900 vat and subject to
your personal Mods
4 wheels All braked
Galvanised.Design
To EU specification .One man f/large load
att 2 photos. Please contact me by
Phone 01773 570329
Ripley Derbyshire. for info and details
Cheers
Colin Smallwood Kit 232 80% complete
Message 3
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--> Europa-List message posted by: "Mr Smallwood" <ctsmallwood@onetel.net.uk>
Hi All
Just collected my new tri gear trailer.(Mono design in process)
Main points Excellent Quality in design and M/F.Circa =A31900 vat and subject to
your personal Mods
4 wheels All braked
Galvanised.Design
To EU specification .One man f/large load
att 2 photos. Please contact me by
Phone 01773 570329
Ripley Derbyshire. for info and details
Cheers
Colin Smallwood Kit 232 80% complete
Message 4
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| Subject: | Re: roll trim tab and servo installation |
--> Europa-List message posted by: "Bill Henderson" <europabill@bellsouth.net>
Bob,
How are you driving the server? It's a 5 volt unit and the plane's 12
volts. Are you strictly driving the motor in the server from a 5 volt
supply or are you using a pulse unit?
Thanks,
Bill
A010
----- Original Message -----
From: "Bob Jacobsen" <jacobsenra@hotmail.com>
Subject: Re: RE : Europa-List: roll trim tab and servo installation
> --> Europa-List message posted by: "Bob Jacobsen" <jacobsenra@hotmail.com>
>
> Michel,
>
> The servo of chioce is a Hitec HS-645MG. It is small, extremely powerful
> and has an alloy gear train and ball bearings.
>
> Thanks for the nice comments on the web site - I was up flying today and I
> still can't get over just how fantastic and fun to fly my plane is.
>
> Are we having FUN yet?!
>
> Bob Jacobsen
> A131
>
>
> >From: "Auvray" <m.auvray@aerodyne-int.com>
> >Reply-To: europa-list@matronics.com
> >To: <europa-list@matronics.com>
> >Subject: RE : Europa-List: roll trim tab and servo installation
> >Date: Tue, 11 Nov 2003 14:42:59 +0100
> >
> >--> Europa-List message posted by: "Auvray" <m.auvray@aerodyne-int.com>
> >
> >Hello Bob
> >Congratulations for your web site and Aicraft they are beautiful.
> >What servo model do you used for the aileron?
> >
> >Thanks
> >Michel Auvray Classic monowheel N145-220 hours(to day)
> >
> > --|--
> >--------(*)--------
> >
> >Michel AUVRAY
> >
> >
> >-----Message d'origine-----
> >De : owner-europa-list-server@matronics.com
> >[mailto:owner-europa-list-server@matronics.com] De la part de Bob
> >Jacobsen
> >Envoy : mardi 11 novembre 2003 02:04
> > : europa-list@matronics.com
> >Objet : Re: Europa-List: roll trim tab and servo installation
> >
> >
> >--> Europa-List message posted by: "Bob Jacobsen"
> >--> <jacobsenra@hotmail.com>
> >
>
> Compare high-speed Internet plans, starting at $26.95.
> https://broadband.msn.com (Prices may vary by service area.)
>
>
Message 5
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| Subject: | Re: roll trim tab and servo installation |
--> Europa-List message posted by: "John & Amy Eckel" <eckel1@comcast.net>
Bob,
Would you mind explaining how you drive your trim tab servo?
Thanks,
John A230
----- Original Message -----
From: "Bob Jacobsen" <jacobsenra@hotmail.com>
Subject: Re: RE : Europa-List: roll trim tab and servo installation
> --> Europa-List message posted by: "Bob Jacobsen" <jacobsenra@hotmail.com>
>
> Michel,
>
> The servo of chioce is a Hitec HS-645MG. It is small, extremely powerful
> and has an alloy gear train and ball bearings.
>
> Thanks for the nice comments on the web site - I was up flying today and I
> still can't get over just how fantastic and fun to fly my plane is.
>
> Are we having FUN yet?!
>
> Bob Jacobsen
> A131
>
>
> >From: "Auvray" <m.auvray@aerodyne-int.com>
> >Reply-To: europa-list@matronics.com
> >To: <europa-list@matronics.com>
> >Subject: RE : Europa-List: roll trim tab and servo installation
> >Date: Tue, 11 Nov 2003 14:42:59 +0100
> >
> >--> Europa-List message posted by: "Auvray" <m.auvray@aerodyne-int.com>
> >
> >Hello Bob
> >Congratulations for your web site and Aicraft they are beautiful.
> >What servo model do you used for the aileron?
> >
> >Thanks
> >Michel Auvray Classic monowheel N145-220 hours(to day)
> >
> > --|--
> >--------(*)--------
> >
> >Michel AUVRAY
> >
> >
> >-----Message d'origine-----
> >De : owner-europa-list-server@matronics.com
> >[mailto:owner-europa-list-server@matronics.com] De la part de Bob
> >Jacobsen
> >Envoy : mardi 11 novembre 2003 02:04
> > : europa-list@matronics.com
> >Objet : Re: Europa-List: roll trim tab and servo installation
> >
> >
> >--> Europa-List message posted by: "Bob Jacobsen"
> >--> <jacobsenra@hotmail.com>
> >
>
> Compare high-speed Internet plans, starting at $26.95.
> https://broadband.msn.com (Prices may vary by service area.)
>
>
Message 6
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--> Europa-List message posted by: Graham Singleton <graham@gflight.f9.co.uk>
At 23:56 12/11/2003 -0800, you wrote:
>Subject: Re: Europa-List: cowlings
>I have seen a couple of Europa's that the lower cowl had been trimmed to the
>rebate molded in the lower cowl, then trimmed back to the face of the
>firewall. In other words a small section had been cut out so that the lower
>cowl fit flat against the fuselage side. The top cowl fit's over it and as a
>result a very smooth line of the cowl to the fuselage side.
>Jim Brown
I've seen a few done that way too, in fact I think I did it myself, (too
long ago to remember accurately!)
Graham
---
Message 7
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| Subject: | Re: roll trim tab and servo installation |
--> Europa-List message posted by: "Michael Grass" <M.Grass@comcast.net>
Hi all,
We are dealing here with 2 (little) problems.
1. The plane has 12V but the servo needs 5 V.
You can go to your local electronic shop and buy for approx. 4 dollar the
parts.
you need
1 Electrolytic capacitor of 1000 uF min.40V (the arrow with the minus sign
must be connected to ground)
1 Voltage regulator from the 7805 family. You can get them as a 1A, 2A or 3A
any one will do. (pin 1 is to the left side if you hold the regulator so you
can read the label, 2 is the middle 3 the right one)
1 MP capacitor 100nF min 40V (must be mounted very close to the regulator
pins)
1 Electrolytic capacitor of 100 uF min.40V (the arrow with the minus sign
must be connected to ground)
I hope you guys will be able to see the drawing!
12V Input--------+--------(1)-7805-(3)-----+--------+----- 5Volt output
! (2) !
!
! ! !
!
1000uF +-100nF-+ 100uF
(-) !
(-)
! !
!
! !
!
ground -----------+---------------+-------------------+------ground
The regulators back side should be mounted against an aluminum plate as a
heat sink.
2. Controlling the servo.
You will be able to get at your hobby shop a little servo tester. It has a
knob (Potentiometer) which can be mounted in your panel and you just dial in
your Trim position. This servo tester just sits electrically between your
5Volt regulator and the servo.
BTW. Bob Jacobson supplied my servo, servo tester electronic and small
hardware needed for aprox 100US. He did not supply the electronics for the
Voltage drop down regulator, but as said before, you can get it at your
local electronic shop.
Hope that helps.
Michael Grass
TriGear A266
----- Original Message -----
From: "John & Amy Eckel" <eckel1@comcast.net>
Subject: Re: RE : Europa-List: roll trim tab and servo installation
> --> Europa-List message posted by: "John & Amy Eckel" <eckel1@comcast.net>
>
> Bob,
> Would you mind explaining how you drive your trim tab servo?
>
> Thanks,
> John A230
> ----- Original Message -----
> From: "Bob Jacobsen" <jacobsenra@hotmail.com>
> To: <europa-list@matronics.com>
> Subject: Re: RE : Europa-List: roll trim tab and servo installation
>
>
> > --> Europa-List message posted by: "Bob Jacobsen"
<jacobsenra@hotmail.com>
> >
> > Michel,
> >
> > The servo of chioce is a Hitec HS-645MG. It is small, extremely
powerful
> > and has an alloy gear train and ball bearings.
> >
> > Thanks for the nice comments on the web site - I was up flying today and
I
> > still can't get over just how fantastic and fun to fly my plane is.
> >
> > Are we having FUN yet?!
> >
> > Bob Jacobsen
> > A131
> >
> >
> > >From: "Auvray" <m.auvray@aerodyne-int.com>
> > >Reply-To: europa-list@matronics.com
> > >To: <europa-list@matronics.com>
> > >Subject: RE : Europa-List: roll trim tab and servo installation
> > >Date: Tue, 11 Nov 2003 14:42:59 +0100
> > >
> > >--> Europa-List message posted by: "Auvray" <m.auvray@aerodyne-int.com>
> > >
> > >Hello Bob
> > >Congratulations for your web site and Aicraft they are beautiful.
> > >What servo model do you used for the aileron?
> > >
> > >Thanks
> > >Michel Auvray Classic monowheel N145-220 hours(to day)
> > >
> > > --|--
> > >--------(*)--------
> > >
> > >Michel AUVRAY
> > >
> > >
> > >-----Message d'origine-----
> > >De : owner-europa-list-server@matronics.com
> > >[mailto:owner-europa-list-server@matronics.com] De la part de Bob
> > >Jacobsen
> > >Envoy : mardi 11 novembre 2003 02:04
> > > : europa-list@matronics.com
> > >Objet : Re: Europa-List: roll trim tab and servo installation
> > >
> > >
> > >--> Europa-List message posted by: "Bob Jacobsen"
> > >--> <jacobsenra@hotmail.com>
> > >
> >
> > Compare high-speed Internet plans, starting at $26.95.
> > https://broadband.msn.com (Prices may vary by service area.)
> >
> >
>
>
Message 8
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--> Europa-List message posted by: "Neville Eyre" <Neville@europa-aircraft.com>
Hi All,
This is my experience with filling / sanding / painting, on planes, boats, cars
etc....take it or leave it ????
Use the Expancell /epoxy system, as supplied by Europa, on all the control surfaces.
These, ideally, should be post cured [ max 55C for 10 hours ] After the post curing,
scrub the surfaces with a hot / strong solution of washing detergent [ Daz
/ Surf / OMO etc ] with a stiff scrubbing [nail brush ? ] Flush off all traces
of detergent with fresh water, and dry in your ''oven'' for a couple of hours
at about 30 C to totally dry out the surface. From now on, wear cotton gloves
when handling, so as not to contaminate the surface [ skin oil, peanut butter
W.H.Y?
Scuff sand the surfaces with 80 grit paper [dry] to remove the shine. Vacuum off
all the dust.
Fully mix some epoxy. Add the Expancell to the FULLY MIXED EPOXY, as much as you
can [or you get fed up with !] until the filler is like bread dough.
Mix up a small amount of resin, moisten the control surface with this mix, just
enough to wet the fibres, it will just be shiney.
Trowel on the Expancell, trying not to get any air trapped under, heavy pressure
with the trowel will normally ensure this. Fair in the filler as best you can,
but leave it well proud, by up to 1/4'', YES 1/4 OF AN INCH ! If the filler
has a ''sweaty shine'' to it, it was mixed too resin rich.
After a couple of hours, you can go back and smooth out some of the ''waves''
Put somewhere warm [or out in the sun] for a couple of days.
Take the surface outside onto padded saw horses, with your back to the wind, and
with a sanding board [3M do a nice sanding board with 40 / 80 / 120 grit paper
called Hook - it, about 18'' long by 2 1/2'' wide] sand with the board held
spanwise, moving in alternate 45 stokes along the surface , you will soon get
a smooth / flat surface, but too high.
Keep sanding until you see the first signs of the glass weave showing... STOP...
If you have mixed the Expancell dry enough, this sanding on a flap or aileron will
have taken you about one hour, and you will have covered your neighbors car
with a fine layer of cream dust !
Filling the seams on the XS wings, and the fuselage, use the Expancell / epoxy,
but slightly wetter, so you just get the ''sweaty shine'' on the trowelled filler.
As an example, two of us [Bill and myself] filled the seams on a pair of Motor
glider wings, and the Airbrakes and Ailerons, ready for the paint shop, in six
working days [12 man days]
Do not use Super fill, [ it is far heavier than a dry mix Expancell filler, it
is much harder to sand, it will sag on any vertical surface, it is very expensive,
and it seems to iritate skin far more ] do not use Smoothprime or their topcoat.
Not impressed at all with those ! Use a barrier coat between the primer
and the topcoat. Ensure the topcoat has at least 97% Ultra Voilet Block. Use
paint product from a quality manufacturer, ie PPG,US Paint, etc....
Do not bother with colloidial silica, we did some ''blind testing'' with a number
of people once, non could tell any difference, I believe the placebo principle
works here !
Do not muck about with all this fishing line nonsense !
If anyone needs further details on this subject, get back to me
Cheers,
Nev.
>>> "Fred R. Klein" <fklein@orcasonline.com> 11/07/03 04:39pm >>>
--> Europa-List message posted by: "Fred R. Klein" <fklein@orcasonline.com>
As I builder just now facing the task of filling, this current thread of
"filler" reminds me of an obscure typeface called "Threadfill" which is
fuzzy, wiggley, and difficult to decipher.
Don't get me wrong...I'm grateful to hear about so many builders'
experiences, and as a consequence, I'm hopeful to avoid pitfalls. And I'm
more than willing to apply the elbow grease and do whatever work is
necessary to get optimal results...nonetheless,
-I'm troubled conceptually with the notion of coating the wings and control
surfaces with as much as 1/4" of filler to be sanded and contoured which
would seem to run the serious risk of altering the airfoils with uncertain
results.
-I'm concerned with the comment that improperly applied filler results in a
surface which is too soft and vulnerable to dings in a fully-finished
airframe.
-I'm surprised to learn of the difficulties which apparently result in the
event that an initial coat of filler is found to be insufficient and
additional filler is required.
-And what is this "colloidal silica" and potential sources for acquiring
some?
Is there someone out there who can spell out "the way"...or am I, and others
like me, left to digest the instructions in the Europa manual with a grain
of salt and thoughtfully consider the various ways previous builders have
addressed this issue?
Would Neville or Andy be willing to stick their oars into this discussion?
a somewhat bewildered Fred, A194
Message 9
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| Subject: | Re: roll trim tab and servo installation |
--> Europa-List message posted by: "John & Amy Eckel" <eckel1@comcast.net>
Mike,
Thank you very much, answers all my questions.
John, A230
do not archive
----- Original Message -----
From: "Michael Grass" <M.Grass@comcast.net>
Subject: Re: RE : Europa-List: roll trim tab and servo installation
> --> Europa-List message posted by: "Michael Grass" <M.Grass@comcast.net>
>
> Hi all,
>
> We are dealing here with 2 (little) problems.
>
> 1. The plane has 12V but the servo needs 5 V.
>
> You can go to your local electronic shop and buy for approx. 4 dollar the
> parts.
> you need
> 1 Electrolytic capacitor of 1000 uF min.40V (the arrow with the minus sign
> must be connected to ground)
> 1 Voltage regulator from the 7805 family. You can get them as a 1A, 2A or
3A
> any one will do. (pin 1 is to the left side if you hold the regulator so
you
> can read the label, 2 is the middle 3 the right one)
> 1 MP capacitor 100nF min 40V (must be mounted very close to the regulator
> pins)
> 1 Electrolytic capacitor of 100 uF min.40V (the arrow with the minus sign
> must be connected to ground)
>
> I hope you guys will be able to see the drawing!
>
> 12V Input--------+--------(1)-7805-(3)-----+--------+----- 5Volt output
> ! (2) !
> !
> ! ! !
> !
> 1000uF +-100nF-+ 100uF
> (-) !
> (-)
> ! !
> !
> ! !
> !
> ground -----------+---------------+-------------------+------ground
>
> The regulators back side should be mounted against an aluminum plate as a
> heat sink.
>
>
> 2. Controlling the servo.
>
> You will be able to get at your hobby shop a little servo tester. It has a
> knob (Potentiometer) which can be mounted in your panel and you just dial
in
> your Trim position. This servo tester just sits electrically between your
> 5Volt regulator and the servo.
>
> BTW. Bob Jacobson supplied my servo, servo tester electronic and small
> hardware needed for aprox 100US. He did not supply the electronics for the
> Voltage drop down regulator, but as said before, you can get it at your
> local electronic shop.
>
> Hope that helps.
>
> Michael Grass
> TriGear A266
> ----- Original Message -----
> From: "John & Amy Eckel" <eckel1@comcast.net>
> To: <europa-list@matronics.com>
> Subject: Re: RE : Europa-List: roll trim tab and servo installation
>
>
> > --> Europa-List message posted by: "John & Amy Eckel"
<eckel1@comcast.net>
> >
> > Bob,
> > Would you mind explaining how you drive your trim tab servo?
> >
> > Thanks,
> > John A230
> > ----- Original Message -----
> > From: "Bob Jacobsen" <jacobsenra@hotmail.com>
> > To: <europa-list@matronics.com>
> > Subject: Re: RE : Europa-List: roll trim tab and servo installation
> >
> >
> > > --> Europa-List message posted by: "Bob Jacobsen"
> <jacobsenra@hotmail.com>
> > >
> > > Michel,
> > >
> > > The servo of chioce is a Hitec HS-645MG. It is small, extremely
> powerful
> > > and has an alloy gear train and ball bearings.
> > >
> > > Thanks for the nice comments on the web site - I was up flying today
and
> I
> > > still can't get over just how fantastic and fun to fly my plane is.
> > >
> > > Are we having FUN yet?!
> > >
> > > Bob Jacobsen
> > > A131
> > >
> > >
> > > >From: "Auvray" <m.auvray@aerodyne-int.com>
> > > >Reply-To: europa-list@matronics.com
> > > >To: <europa-list@matronics.com>
> > > >Subject: RE : Europa-List: roll trim tab and servo installation
> > > >Date: Tue, 11 Nov 2003 14:42:59 +0100
> > > >
> > > >--> Europa-List message posted by: "Auvray"
<m.auvray@aerodyne-int.com>
> > > >
> > > >Hello Bob
> > > >Congratulations for your web site and Aicraft they are beautiful.
> > > >What servo model do you used for the aileron?
> > > >
> > > >Thanks
> > > >Michel Auvray Classic monowheel N145-220 hours(to day)
> > > >
> > > > --|--
> > > >--------(*)--------
> > > >
> > > >Michel AUVRAY
> > > >
> > > >
> > > >-----Message d'origine-----
> > > >De : owner-europa-list-server@matronics.com
> > > >[mailto:owner-europa-list-server@matronics.com] De la part de Bob
> > > >Jacobsen
> > > >Envoy : mardi 11 novembre 2003 02:04
> > > > : europa-list@matronics.com
> > > >Objet : Re: Europa-List: roll trim tab and servo installation
> > > >
> > > >
> > > >--> Europa-List message posted by: "Bob Jacobsen"
> > > >--> <jacobsenra@hotmail.com>
> > > >
> > >
> > > Compare high-speed Internet plans, starting at $26.95.
> > > https://broadband.msn.com (Prices may vary by service area.)
> > >
> > >
> >
> >
>
>
Message 10
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| Subject: | Re: roll trim tab and servo installation |
--> Europa-List message posted by: "Bill Henderson" <europabill@bellsouth.net>
Thanks Michael.
That's kinda how I expected he was doing it. Think I've got most of the
parts laying around to buid up the 5v supply and the "servo tester". Think
I've got a schematic around somewhere.....
Bill
A010
----- Original Message -----
From: "Michael Grass" <M.Grass@comcast.net>
Subject: Re: RE : Europa-List: roll trim tab and servo installation
> --> Europa-List message posted by: "Michael Grass" <M.Grass@comcast.net>
>
> Hi all,
>
> We are dealing here with 2 (little) problems.
>
> 1. The plane has 12V but the servo needs 5 V.
>
> You can go to your local electronic shop and buy for approx. 4 dollar the
> parts.
> you need
> 1 Electrolytic capacitor of 1000 uF min.40V (the arrow with the minus sign
> must be connected to ground)
> 1 Voltage regulator from the 7805 family. You can get them as a 1A, 2A or
3A
> any one will do. (pin 1 is to the left side if you hold the regulator so
you
> can read the label, 2 is the middle 3 the right one)
> 1 MP capacitor 100nF min 40V (must be mounted very close to the regulator
> pins)
> 1 Electrolytic capacitor of 100 uF min.40V (the arrow with the minus sign
> must be connected to ground)
>
> I hope you guys will be able to see the drawing!
>
> 12V Input--------+--------(1)-7805-(3)-----+--------+----- 5Volt output
> ! (2) !
> !
> ! ! !
> !
> 1000uF +-100nF-+ 100uF
> (-) !
> (-)
> ! !
> !
> ! !
> !
> ground -----------+---------------+-------------------+------ground
>
> The regulators back side should be mounted against an aluminum plate as a
> heat sink.
>
>
> 2. Controlling the servo.
>
> You will be able to get at your hobby shop a little servo tester. It has a
> knob (Potentiometer) which can be mounted in your panel and you just dial
in
> your Trim position. This servo tester just sits electrically between your
> 5Volt regulator and the servo.
>
> BTW. Bob Jacobson supplied my servo, servo tester electronic and small
> hardware needed for aprox 100US. He did not supply the electronics for the
> Voltage drop down regulator, but as said before, you can get it at your
> local electronic shop.
>
> Hope that helps.
>
> Michael Grass
> TriGear A266
> ----- Original Message -----
> From: "John & Amy Eckel" <eckel1@comcast.net>
> To: <europa-list@matronics.com>
> Subject: Re: RE : Europa-List: roll trim tab and servo installation
>
>
> > --> Europa-List message posted by: "John & Amy Eckel"
<eckel1@comcast.net>
> >
> > Bob,
> > Would you mind explaining how you drive your trim tab servo?
> >
> > Thanks,
> > John A230
> > ----- Original Message -----
> > From: "Bob Jacobsen" <jacobsenra@hotmail.com>
> > To: <europa-list@matronics.com>
> > Subject: Re: RE : Europa-List: roll trim tab and servo installation
> >
> >
> > > --> Europa-List message posted by: "Bob Jacobsen"
> <jacobsenra@hotmail.com>
> > >
> > > Michel,
> > >
> > > The servo of chioce is a Hitec HS-645MG. It is small, extremely
> powerful
> > > and has an alloy gear train and ball bearings.
> > >
> > > Thanks for the nice comments on the web site - I was up flying today
and
> I
> > > still can't get over just how fantastic and fun to fly my plane is.
> > >
> > > Are we having FUN yet?!
> > >
> > > Bob Jacobsen
> > > A131
> > >
> > >
> > > >From: "Auvray" <m.auvray@aerodyne-int.com>
> > > >Reply-To: europa-list@matronics.com
> > > >To: <europa-list@matronics.com>
> > > >Subject: RE : Europa-List: roll trim tab and servo installation
> > > >Date: Tue, 11 Nov 2003 14:42:59 +0100
> > > >
> > > >--> Europa-List message posted by: "Auvray"
<m.auvray@aerodyne-int.com>
> > > >
> > > >Hello Bob
> > > >Congratulations for your web site and Aicraft they are beautiful.
> > > >What servo model do you used for the aileron?
> > > >
> > > >Thanks
> > > >Michel Auvray Classic monowheel N145-220 hours(to day)
> > > >
> > > > --|--
> > > >--------(*)--------
> > > >
> > > >Michel AUVRAY
> > > >
> > > >
> > > >-----Message d'origine-----
> > > >De : owner-europa-list-server@matronics.com
> > > >[mailto:owner-europa-list-server@matronics.com] De la part de Bob
> > > >Jacobsen
> > > >Envoy : mardi 11 novembre 2003 02:04
> > > > : europa-list@matronics.com
> > > >Objet : Re: Europa-List: roll trim tab and servo installation
> > > >
> > > >
> > > >--> Europa-List message posted by: "Bob Jacobsen"
> > > >--> <jacobsenra@hotmail.com>
> > > >
> > >
> > > Compare high-speed Internet plans, starting at $26.95.
> > > https://broadband.msn.com (Prices may vary by service area.)
> > >
> > >
> >
> >
>
>
Message 11
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| Subject: | Re: roll trim tab and servo installation |
--> Europa-List message posted by: n3eu@comcast.net
Michael Grass wrote:
> ...
> 1 Electrolytic capacitor of 1000 uF min.40V
> 1 Voltage regulator from the 7805 family...
It won't do any harm, but a big 1000uf/40V cap will not accomplish anything, since
you have a real monster filter capacitor already in the form of the airplane's
battery. However, National Semiconductor's application notes for the 7805
say you _do_ need a .22 or .33uf cap here, where the regulator is some distance
from the input filter (here the battery), and for the implied purpose, a small
value cap does the better job of it than 1000uf.
> 1 Electrolytic capacitor of 100 uF min.40V
A cap that size on the output can be harmful per NS, but the unknown here is the
effect of high-freq alternator noise on the input (vs 60Hz AC) and motor noise
on the output. I'd thus eliminate this added cap on the output and help protect
the 7805 with a rectifier diode (1N400x) across input/output, with the banded
end toward the input.
Regards,
Fred F.
Message 12
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--> Europa-List message posted by: JohnDHeykoop@aol.com
Hi Neville
OK, you are the expert, and if you say it is necessary to trowel on up to a
1/4 inch of filler, that's how I'll do it.
But I would like to understand why. What is the point of putting on such a
thick layer of Expancell if you are going to sand nearly all of it off?
Regards
John Heykoop
XS mono G-JHKP, #536
In a message dated 11/13/03 3:36:55 PM GMT Standard Time,
Neville@europa-aircraft.com writes:
> Trowel on the Expancell, trying not to get any air trapped under, heavy
> pressure with the trowel will normally ensure this. Fair in the filler as best
> you can, but leave it well proud, by up to 1/4'', YES 1/4 OF AN INCH !
Message 13
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--> Europa-List message posted by: Jeff Roberts <jeff@rmmm.net>
on 11/13/03 2:49 PM, JohnDHeykoop@aol.com at JohnDHeykoop@aol.com wrote:
> --> Europa-List message posted by: JohnDHeykoop@aol.com
>
> Hi Neville
>
> OK, you are the expert, and if you say it is necessary to trowel on up to a
> 1/4 inch of filler, that's how I'll do it.
>
> But I would like to understand why. What is the point of putting on such a
> thick layer of Expancell if you are going to sand nearly all of it off?
>
> Regards
>
> John Heykoop
> XS mono G-JHKP, #536
>
>
>
>
>>
>
>
>
>
The point I think Nevel is making is up to a 1/4 of an inch. From one that
is done filling and sanding I will say he is right. When you try to put on
the minimum you end up re-filling waiting for cure then re-sanding. It takes
longer! Just make sure to fill until you cant see the weave anywhere. If it
ends up being 1/4 inch its OK! Easier to sand off a lot once than to
re-fill & sand.
Jeff
A258
Message 14
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--> Europa-List message posted by: James Nelson <europajim@juno.com>
John,
You would be surprised how much variance there is on the wing.
There will be places where a 1/4" of filler is just about right. So you
just have to sand it down to the point where all things are level and
smooth. Trust me I had the classic wings and much sanding was necessary.
The wings look good now!
Jim Nelson
On Thu, 13 Nov 2003 14:49:31 EST JohnDHeykoop@aol.com writes:
> --> Europa-List message posted by: JohnDHeykoop@aol.com
>
> Hi Neville
>
> OK, you are the expert, and if you say it is necessary to trowel on
> up to a
> 1/4 inch of filler, that's how I'll do it.
>
> But I would like to understand why. What is the point of putting on
> such a
> thick layer of Expancell if you are going to sand nearly all of it
> off?
>
> Regards
>
> John Heykoop
> XS mono G-JHKP, #536
>
> In a message dated 11/13/03 3:36:55 PM GMT Standard Time,
> Neville@europa-aircraft.com writes:
>
>
> > Trowel on the Expancell, trying not to get any air trapped under,
> heavy
> > pressure with the trowel will normally ensure this. Fair in the
> filler as best
> > you can, but leave it well proud, by up to 1/4'', YES 1/4 OF AN
> INCH !
>
>
>
> _->
=
>
=
>
=
>
=
>
>
>
>
>
>
Message 15
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--> Europa-List message posted by: "Ami McFadyean" <ami@mcfadyean.freeserve.co.uk>
So first find out where the areas are that need 1/4". Unless you like
filling and sanding!!
Duncan McF.
----- Original Message -----
From: "James Nelson" <europajim@juno.com>
Subject: Re: Europa-List: filler
> --> Europa-List message posted by: James Nelson <europajim@juno.com>
>
> John,
> You would be surprised how much variance there is on the wing.
> There will be places where a 1/4" of filler is just about right. So you
> just have to sand it down to the point where all things are level and
> smooth. Trust me I had the classic wings and much sanding was necessary.
> The wings look good now!
>
> Jim Nelson
>
>
> On Thu, 13 Nov 2003 14:49:31 EST JohnDHeykoop@aol.com writes:
> > --> Europa-List message posted by: JohnDHeykoop@aol.com
> >
> > Hi Neville
> >
> > OK, you are the expert, and if you say it is necessary to trowel on
> > up to a
> > 1/4 inch of filler, that's how I'll do it.
> >
> > But I would like to understand why. What is the point of putting on
> > such a
> > thick layer of Expancell if you are going to sand nearly all of it
> > off?
> >
> > Regards
> >
> > John Heykoop
> > XS mono G-JHKP, #536
> >
> > In a message dated 11/13/03 3:36:55 PM GMT Standard Time,
> > Neville@europa-aircraft.com writes:
> >
> >
> > > Trowel on the Expancell, trying not to get any air trapped under,
> > heavy
> > > pressure with the trowel will normally ensure this. Fair in the
> > filler as best
> > > you can, but leave it well proud, by up to 1/4'', YES 1/4 OF AN
> > INCH !
> >
> >
> >
> > _->
> > >
> > >
> > >
> > >
> >
> >
> >
> >
> >
>
>
Message 16
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| Subject: | Re: roll trim tab and servo installation |
--> Europa-List message posted by: "Michael Grass" <M.Grass@comcast.net>
Fred,
I appreciate your input but think again:
1. A large (dimensional 12mm * 25mm) cap is not a problem. Electrically
1000uF reduces the effects on the supply and stiffens the supply for
regulating purpose. True it is electrically large and I have no problem if
you reduce its size.
2. The small unipolar cap of 10 nF to 100nF is absolutely needed to prevent
an extra unwanted radio transmitter beside the avionics.
3. The cap on the output is not harmful to the 7805 since it is completely
self protected. The cap helps to stabilize the relatively high inrush
current to the motor from the serve.
4. You said it by yourself. You have to monster filter already in the
system. The cap near the alternator and the battery. True, for the higher
frequencies all 3 "filters" do a lousy job. That's where the by NS
recommended 0.22uF to 0.33uF cap comes in handy because of its relatively
low impedance compared to the other 3 it has the ability to deal with the
higher frequency noise and therefore a good think to do.
5. The diode does not harm but does not buy you a real advantage
The overall verdict is:
1. Most values are in this circuit uncritical except the 10-100nF close to
pin 2 and 3
2. As an HF noise filter a cap of .22 to .33uF is recommended between pin 1
and 2. Thanks for reminding!
3. Input and output caps can be omitted but are beneficial. Rule here is
that the input cap should be 10 times larger as the output cap to have a
stable regulating result. Anything between 100uF and 1000uF for an input and
10 to 100uF for the output would be my recommendation.
Michael Grass
A266
----- Original Message -----
From: <n3eu@comcast.net>
Subject: Re: RE : Europa-List: roll trim tab and servo installation
> --> Europa-List message posted by: n3eu@comcast.net
>
> Michael Grass wrote:
> > ...
> > 1 Electrolytic capacitor of 1000 uF min.40V
>
> > 1 Voltage regulator from the 7805 family...
>
> It won't do any harm, but a big 1000uf/40V cap will not accomplish
anything, since you have a real monster filter capacitor already in the form
of the airplane's battery. However, National Semiconductor's application
notes for the 7805 say you _do_ need a .22 or .33uf cap here, where the
regulator is some distance from the input filter (here the battery), and for
the implied purpose, a small value cap does the better job of it than
1000uf.
>
> > 1 Electrolytic capacitor of 100 uF min.40V
>
> A cap that size on the output can be harmful per NS, but the unknown here
is the effect of high-freq alternator noise on the input (vs 60Hz AC) and
motor noise on the output. I'd thus eliminate this added cap on the output
and help protect the 7805 with a rectifier diode (1N400x) across
input/output, with the banded end toward the input.
>
> Regards,
> Fred F.
>
>
Message 17
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--> Europa-List message posted by: "paul stewart" <paul-d.stewart@virgin.net>
Clearly this is 'The way' Fred referred to - best leave 'mucking about with
nonsense' for those without the wit to realise it.
Regards
Paul
----- Original Message -----
From: "Neville Eyre" <Neville@europa-aircraft.com>
Subject: Re: Europa-List: filler
> --> Europa-List message posted by: "Neville Eyre"
<Neville@europa-aircraft.com>
>
> Hi All,
> This is my experience with filling / sanding / painting, on planes, boats,
cars etc....take it or leave it ????
> Use the Expancell /epoxy system, as supplied by Europa, on all the control
surfaces.
> These, ideally, should be post cured [ max 55C for 10 hours ] After the
post curing, scrub the surfaces with a hot / strong solution of washing
detergent [ Daz / Surf / OMO etc ] with a stiff scrubbing [nail brush ? ]
Flush off all traces of detergent with fresh water, and dry in your ''oven''
for a couple of hours at about 30 C to totally dry out the surface. From now
on, wear cotton gloves when handling, so as not to contaminate the surface
[ skin oil, peanut butter W.H.Y?
> Scuff sand the surfaces with 80 grit paper [dry] to remove the shine.
Vacuum off all the dust.
> Fully mix some epoxy. Add the Expancell to the FULLY MIXED EPOXY, as much
as you can [or you get fed up with !] until the filler is like bread dough.
> Mix up a small amount of resin, moisten the control surface with this mix,
just enough to wet the fibres, it will just be shiney.
> Trowel on the Expancell, trying not to get any air trapped under, heavy
pressure with the trowel will normally ensure this. Fair in the filler as
best you can, but leave it well proud, by up to 1/4'', YES 1/4 OF AN INCH !
If the filler has a ''sweaty shine'' to it, it was mixed too resin rich.
> After a couple of hours, you can go back and smooth out some of the
''waves''
> Put somewhere warm [or out in the sun] for a couple of days.
> Take the surface outside onto padded saw horses, with your back to the
wind, and with a sanding board [3M do a nice sanding board with 40 / 80 /
120 grit paper called Hook - it, about 18'' long by 2 1/2'' wide] sand with
the board held spanwise, moving in alternate 45 stokes along the surface ,
you will soon get a smooth / flat surface, but too high.
> Keep sanding until you see the first signs of the glass weave showing...
STOP...
> If you have mixed the Expancell dry enough, this sanding on a flap or
aileron will have taken you about one hour, and you will have covered your
neighbors car with a fine layer of cream dust !
> Filling the seams on the XS wings, and the fuselage, use the Expancell /
epoxy, but slightly wetter, so you just get the ''sweaty shine'' on the
trowelled filler.
> As an example, two of us [Bill and myself] filled the seams on a pair of
Motor glider wings, and the Airbrakes and Ailerons, ready for the paint
shop, in six working days [12 man days]
> Do not use Super fill, [ it is far heavier than a dry mix Expancell
filler, it is much harder to sand, it will sag on any vertical surface, it
is very expensive, and it seems to iritate skin far more ] do not use
Smoothprime or their topcoat. Not impressed at all with those ! Use a
barrier coat between the primer and the topcoat. Ensure the topcoat has at
least 97% Ultra Voilet Block. Use paint product from a quality manufacturer,
ie PPG,US Paint, etc....
> Do not bother with colloidial silica, we did some ''blind testing'' with a
number of people once, non could tell any difference, I believe the placebo
principle works here !
> Do not muck about with all this fishing line nonsense !
> If anyone needs further details on this subject, get back to me
> Cheers,
> Nev.
>
>
> >>> "Fred R. Klein" <fklein@orcasonline.com> 11/07/03 04:39pm >>>
> --> Europa-List message posted by: "Fred R. Klein"
<fklein@orcasonline.com>
>
> As I builder just now facing the task of filling, this current thread of
> "filler" reminds me of an obscure typeface called "Threadfill" which is
> fuzzy, wiggley, and difficult to decipher.
>
> Don't get me wrong...I'm grateful to hear about so many builders'
> experiences, and as a consequence, I'm hopeful to avoid pitfalls. And I'm
> more than willing to apply the elbow grease and do whatever work is
> necessary to get optimal results...nonetheless,
>
> -I'm troubled conceptually with the notion of coating the wings and
control
> surfaces with as much as 1/4" of filler to be sanded and contoured which
> would seem to run the serious risk of altering the airfoils with uncertain
> results.
>
> -I'm concerned with the comment that improperly applied filler results in
a
> surface which is too soft and vulnerable to dings in a fully-finished
> airframe.
>
> -I'm surprised to learn of the difficulties which apparently result in the
> event that an initial coat of filler is found to be insufficient and
> additional filler is required.
>
> -And what is this "colloidal silica" and potential sources for acquiring
> some?
>
> Is there someone out there who can spell out "the way"...or am I, and
others
> like me, left to digest the instructions in the Europa manual with a grain
> of salt and thoughtfully consider the various ways previous builders have
> addressed this issue?
>
> Would Neville or Andy be willing to stick their oars into this discussion?
>
> a somewhat bewildered Fred, A194
>
>
Message 18
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--> Europa-List message posted by: "Alan Stills" <astills785@earthlink.net>
Thanks to all who replied to my inquiry. I have tried to reply all week to no avial.
My messages keep getting returned as I have seen others. I decided to flos
a small galvanized angle iron to the bottom of the spar hole and to put a piece
of plywood at the top to keep in allignment. I think it will work super.
Al Stills
A095
Message 19
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--> Europa-List message posted by: "Jim Puglise" <jim_puglise@hotmail.com>
Ferg-
Carry a fourth. Should you ever go down, they are a super signal mirror for
illuminating your position for search aircraft. What would we do without
AOL?
Jim, FL
>From: "Fergus Kyle" <VE3LVO@rac.ca>
>Reply-To: europa-list@matronics.com
>To: "EUROPALIST" <europa-list@matronics.com>,
><aeroelectric-list@matronics.com>
>Subject: Europa-List: GPSpecial
>Date: Wed, 12 Nov 2003 12:29:38 -0500
>
>--> Europa-List message posted by: "Fergus Kyle" <VE3LVO@rac.ca>
>
>There you go............
>Jim Weir in the latest (must be DEC03) issue, tried out an AOL CD-ROM disc
>as a groundplane for his GPS, on his hightech garbage-can antenna test
>range, and found a barely measureable difference from carefully-fashioned
>aluminum sheet.
> I consider my model Europa to be high-tech since it will incorporate 3
>AOL discs - one under the fuel selector handle, one under the GPS antenna
>and one under the TXR stub - for now anyway.
>Cheers, Ferg
>Europa Mono #A064
>
>
Great deals on high-speed Internet access as low as $26.95.
https://broadband.msn.com (Prices may vary by service area.)
Message 20
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| Subject: | Re: roll trim tab and servo installation |
--> Europa-List message posted by: n3eu@comcast.net
Michael Grass wrote:
> Fred,
>
> I appreciate your input but think again:
>
> 1. A large (dimensional 12mm * 25mm) cap is not a problem. Electrically
> 1000uF reduces the effects on the supply and stiffens the supply for
> regulating purpose. True it is electrically large and I have no problem if
> you reduce its size.
Not my input ultimately, but National Semiconductor. ;-)
The larger the cap the bigger the inductor, and they best filter 60Hz AC line hum.
At high freqenies (alternator) and fast-rise spikes (Rotax regulator), a large
cap will do nothing if not make things worse. In looking at various avionics
schematics, I suspect this is one reason one often finds a small value cap
on the 14V input, as little as .01uF, some a hundred. Some use small caps and
a choke, the effective way if needed to condition high-freq, noisy input.
> 3. The cap on the output is not harmful to the 7805 since it is completely
> self protected.
The subtle issue is the storage capability of the cap, the larger the worse. When
14V power is removed from the circuit, and if the input lead goes to ground
(a master relay can briefly do that), the 7805 regulator can be destroyed.
Plus maybe pop a fuse. The diode I suggested prevents that and is recommended
by National Semi if any input grounding can happen.
> The [output] cap helps to stabilize the relatively high inrush
> current to the motor from the servo.
It sure will, but the inrush current (caused by a large output cap) when you merely
switch on the circuit is many times the current jolt to the regulator than
motor startup should cause. IOW, a net loss in abuse to the regulator IC, the
more microfarads the worse.
> 3. Input and output caps can be omitted but are beneficial. Rule here is
> that the input cap should be 10 times larger as the output cap to have a
> stable regulating result. Anything between 100uF and 1000uF for an input and
> 10 to 100uF for the output would be my recommendation.
Actually my texts cite no 10/1 rule, but rather National says the output cap is
mandatory and should be selected (value and ESR) for phase shift relative to
input noise frequency. Else it can oscillate, and that you could hear in the
avionics (plus a DC servo wouldn't work too well)! As practical matter, the noise
products on the input should be small enough, due to what the battery does,
so this shouldn't happen. Further effective is a tantalum cap, due to its
low ESR, they say. 1 uF typical.
Regards,
Fred F.
Message 21
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| Subject: | Re: roll trim tab and servo installation |
--> Europa-List message posted by: "Michael Grass" <M.Grass@comcast.net>
Fred,
please contribute to the forum and do not confuse people.
Look at my answers in the body and believe them or forget them. This will
be my last contribution(confusion) to this topic. If you won't to be helpful
to this forum, do not state what is bad, rather come up with a good design.
Keep in mind that many designs are possible. My approach is: Keep it simple
and robust.
Michael Grass
----- Original Message -----
From: <n3eu@comcast.net>
Subject: Re: RE : Europa-List: roll trim tab and servo installation
> --> Europa-List message posted by: n3eu@comcast.net
>
> Michael Grass wrote:
>
> > Fred,
> >
> > I appreciate your input but think again:
> >
> > 1. A large (dimensional 12mm * 25mm) cap is not a problem. Electrically
> > 1000uF reduces the effects on the supply and stiffens the supply for
> > regulating purpose. True it is electrically large and I have no problem
if
> > you reduce its size.
>
> Not my input ultimately, but National Semiconductor. ;-)
(MG) not true, the stated 0.22uf comes later after the stabilized source.
>
> The larger the cap the bigger the inductor, and they best filter 60Hz AC
line hum. At high freqenies (alternator) and fast-rise spikes (Rotax
regulator), a large cap will do nothing if not make things worse. In
looking at various avionics schematics, I suspect this is one reason one
often finds a small value cap on the 14V input, as little as .01uF, some a
hundred. Some use small caps and a choke, the effective way if needed to
condition high-freq, noisy input.
>
(MG) Fred this is exactly right. this is where the .22uF comes into the game
not the 0.01. Where dou you get the 60HZ from??? The rotax produces between
aprox. 6kHz to 36Hz fundumental plus much higher harmonics. Thats a 2 pole
motor on a DB3 rectifier means rpm times 6. There are no 60Hz unless you
are in an american garage or in europe it would be 50Hz induced vthrough the
air.
When 14V power is removed from the circuit, and if the input lead goes to
ground (a master relay can briefly do that), the 7805 regulator can be
destroyed. Plus maybe pop a fuse. The diode I suggested prevents that and
is recommended by National Semi if any input grounding can happen.
>
(MG) The master relais will not do that but the other loads of course will
discharge the larger capacitor. So will do the servo tester and the servo
itself. NS states if a cap of 10uF is used a diode can be omitted. This
stands for no load connected. The diode will not hurt but you don't gain
much.
> > The [output] cap helps to stabilize the relatively high inrush
> > current to the motor from the servo.
>
> It sure will, but the inrush current (caused by a large output cap) when
you merely switch on the circuit is many times the current jolt to the
regulator than motor startup should cause. IOW, a net loss in abuse to the
regulator IC, the more microfarads the worse.
> (MG) my advise is, do not switch the unit of and on several times in a
second. Usualy when I go flying, I switch he master on, fly for at least
30min or much much longer and then switch it of. Gusty winds, means
disturbance force on the tab, means current spikes in the servo , happends
more frequent then me toggeling the avionics master.
> > 3. Input and output caps can be omitted but are beneficial. Rule here is
> > that the input cap should be 10 times larger as the output cap to have a
> > stable regulating result. Anything between 100uF and 1000uF for an input
and
> > 10 to 100uF for the output would be my recommendation.
>
> Actually my texts cite no 10/1 rule, but rather National says the output
cap is mandatory and should be selected (value and ESR) for phase shift
relative to input noise frequency. Else it can oscillate, and that you
could hear in the avionics (plus a DC servo wouldn't work too well)! As
practical matter, the noise products on the input should be small enough,
due to what the battery does, so this shouldn't happen. Further effective
is a tantalum cap, due to its low ESR, they say. 1 uF typical.
> (MG) Interesting, before you did state a cap on the output would be
harmfull. Hmm no more comment.
> Regards,
> Fred F.
>
>
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