Today's Message Index:
----------------------
1. 04:20 AM - Yakkers near LHR (Sam Whatmough)
2. 08:30 AM - Re: RC Allen RCA2600 ADI (marklevy)
3. 11:45 AM - Impressive Y-52 Video (Craig Winkelmann)
4. 12:19 PM - Re: Shower of Sparks; What is it? (Yak Pilot)
5. 03:47 PM - Re: Re: RC Allen RCA2600 ADI (Dave \)
6. 06:45 PM - Re: Re: RC Allen RCA2600 ADI (Roger Kemp MD)
Message 1
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| Subject: | Yakkers near LHR |
Hi Mike,
There are lots of us Yakkers near LHR. I's be more than happy to
introduce you but alas I'm away in Shanghai with work this weekend.
Hope you has a good stop in London, and see you next time!
Sam
G-OHNO
Yak 55
Message 2
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| Subject: | Re: RC Allen RCA2600 ADI |
Doc,
Do you by chance have a pic of your panel with the Dynon fitted?
Mark
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=236660#236660
Message 3
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| Subject: | Impressive Y-52 Video |
Some nice flying in the 52. Interesting "pattern" for landing!
http://www.youtube.com/watch?v=_LgbIj6L2cY
How to get rid of your GIB!
http://www.youtube.com/watch?v=vp5kfvt8PPE
Enjoy....Craig
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=236698#236698
Message 4
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| Subject: | Re: Shower of Sparks; What is it? |
Walt, =0A-=0AAppreciate the references.- Thanks for your patience and u
nderstanding.- =0A-=0AMark=0A=0Ap.s.- You're darn toot'in it's a free
country, and my thanks for every man and women that is helping to keep it
that way today.- =0A=0A-=0A=0A=0A=0A________________________________=0A
From: Walter Lannon <wlannon@persona.ca>=0ATo: yak-list@matronics.com=0ASen
t: Sunday, March 29, 2009 12:12:18 AM=0ASubject: Re: Yak-List: Shower of Sp
on@persona.ca>=0A=0AMark;=0A=0ABooster Coil references;=0A=0AThere are many
.=0AWe could start with Brimm & Boggess Aircraft Engine Maintenance, 1939
=0Aedition- but of course you have never heard of that.=0AAlso could quot
e T6 & Harvard TO.'s & EO's- but you do not have those.=0AThe above only
give a basic description in any case so I will give you one =0Athat describ
es all of the auxiliary starting systems and which you should be =0Aable to
download.=0A=0AIt is FAA Advisory Circular AC65-12.=0APage 192 to 196 in m
y 1971 copy . I believe there is now revision A which =0Amay or may not hav
e the same page numbers.=0AAs well as reading the text you will be interest
ed in the illustrations=0Aparticularly 4-21 - Booster Coil and 4-22 - Induc
tion Vibrator.=0AThere are also schematics for both the high tension and lo
w tension retard =0Abreaker types. The second refers to the low tension mag
netos for high =0Aaltitude operation of radial engines where each spark plu
g has it's own =0Asecondary coil.=0AYou will also note that Fig. 4-21 is an
exact picture of the Chinese (and =0AI'm sure the Russian) booster coil. I
t was copied from the AN unit.=0A=0AAs for me wanting to break it down into
sub-categories the fact is that was =0Adown probably before you were born
and by people probably a lot smarter than =0Ame.=0AHowever you can call it
shower of sparks or whatever the hell you like, its =0Aa free country..=0A
=0AWalt=0A=0A=0A----- Original Message ----- =0AFrom: "Bitterlich, Mark G C
IV Det Cherry Point, MALS-14 64E" =0A<mark.bitterlich@navy.mil>=0ATo: <yak-
list@matronics.com>=0ASent: Friday, March 27, 2009 12:41 PM=0ASubject: RE:
Yak-List: Shower of Sparks; What is it?=0A=0A=0A> --> Yak-List message post
ed by: "Bitterlich, Mark G CIV Det Cherry Point, =0A> MALS-14 64E" <mark.bi
tterlich@navy.mil>=0A>=0A>=0A> Walt,=0A>=0A> Here is how I look at it, and
of course everyone is welcome to have=0A> their own opinion on the matter.
=0A>=0A> Most aircraft engines use mags.- Magnetos do not work real well
at low=0A> RPM, so starting an engine with them becomes a problem because s
tarters=0A> do not usually spin them fast enough to provide enough spark en
ergy.=0A>=0A> Because of that, two systems have been devised to provide for
enough=0A> energy to start a mag equipped engine.=0A>=0A> 1.- Impulse co
uplers.=0A> 2.- Shower of spark systems.=0A>=0A> It appears you want to b
reak down the "shower of sparks" term into two=0A> sub-categories depending
on where the secondary portion of the=0A> transformer is located.- If th
e primary and secondary of the transformer=0A> are in the same box, you cal
l it a "boost coil" system.- If the=0A> secondary is in the mags, it is c
alled a "shower of sparks" system.- If=0A> I am correct in that this is y
our view, that's fine.... But I don't see=0A> it that way.- Just happens
to be my personal opinion on the matter.- But=0A> for the sake of discuss
ion, I would appreciate a reference to the use of=0A> the term "boost coil"
.=0A>=0A> To explain:- I personally consider any ignition system that use
s the=0A> basic design of a doorbell buzzer to create a square wave that th
en=0A> feeds a transformer can be properly referred to as a "shower of spar
ks"=0A> system.=0A>=0A> Regardless of where the primary or secondary of the
transformer (in=0A> proper terms: The Ignition Coil) is located, the overa
ll design concept=0A> remains identical.- A "doorbell buzzer" (per se) is
used to rapidly and=0A> continuously open and close a set of points, that
creates a "buzzing"=0A> noise.- These points are fed by DC battery voltag
e, and as they open and=0A> close they create a square wave.- A square wa
ve is a form of Alternating=0A> Current.- Alternating current is needed t
o operate a transformer.- A=0A> transformer always has a primary (voltage
input) and a secondary=0A> (voltage output).- In the typical M-14 engine
design, the primary and=0A> the secondary and the "buzzer" are all located
in the same box.- This is=0A> identical to the system that was first use
d in the Model T Ford engine.=0A> This constant energy source is then fed t
o the magneto cap where it is=0A> then fed through the normal mag rotor to
the normal mag cap, then to the=0A> spark plugs of the engine.- A second
"point" on the rotor is used to=0A> create a retarded timing situation.=0A>
=0A> The end result is that instead of just one big single energy surge goi
ng=0A> to each spark plug in sequence, initiated by the mag point set, ther
e is=0A> a solid stream of spark energy going continuously to each spark pl
ug as=0A> the rotor turns creating more than one spark to each plug, thus t
he=0A> term:- "A SHOWER OF SPARKS".- If this is a Trade Word term, so b
e it.=0A>=0A> Some systems actually connect the buzzer points to the P lead
of the mag=0A> itself.- In the end, you get the exact same effect.... "A
shower of=0A> sparks".=0A>=0A> Yes, the Yak's use a box that contains the
buzzer, the primary and the=0A> secondary of the ignition transformer in on
e box. I call that a shower=0A> of sparks transformer.- You call it a "bo
ost coil".- No problem.=0A>=0A> Mark=0A>=0A> P.s. Good reference:=0A> htt
p://www.aeroelectric.com/articles/Shower-of-Sparks/ShowerOfSparks.pdf=0A>
=0A>=0A>=0A>=0A> -----Original Message-----=0A> From: owner-yak-list-server
@matronics.com=0A> [mailto:owner-yak-list-server@matronics.com] On Behalf O
f Walter Lannon=0A> Sent: Thursday, March 26, 2009 11:45 PM=0A> To: yak-lis
t@matronics.com=0A> Subject: Re: Yak-List: Shower of Sparks lesson (LONG)
=0A>=0A> Mark;=0A>=0A> You , and many others on the list, refer to the star
t system as "shower=0A> of sparks".=0A>=0A> The CJ is the only aircraft of
this genre that I am fully familiar with=0A> and that start system utilizes
a boost coil.- Is the Yak 50, 52=0A> different?=0A>=0A> Shower of Sparks
was, many years ago, a Bendix registered trade name for=0A> a start system
that utilized a low voltage ( 12 or 24) vibrator that=0A> bypassed the mag
neto primary circuit and energized the MAGNETO secondary=0A> to provide the
high tension current for starting, through the normal=0A> distribution sys
tem, that a slow turning mag. could not.=0A>=0A> The boost coil by comparis
on is a self contained primary/secondary unit=0A> that provides the high te
nsion directly to a retarded electrode in the=0A> mag.=0A> distributor.=0A>
=0A> The early T6/ Harvard 2 use a boost coil.- The T6G/ Harvard 4 utiliz
e a=0A> vibrator, i.e.;- Bendix "Shower of Sparks".=0A>=0A> I understand
there is another shower of sparks system ( by Lamar? or?)=0A> but I have no
idea how that works.=0A>=0A> What system do the Yaks use?=0A>=0A> Walt=0A>
=======================
Message 5
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| Subject: | Re: RC Allen RCA2600 ADI |
Mark: Here are some photos of the Dynon I put in my 52TD in the front and
back. It is Gucci!
dave jester
----- Original Message -----
From: "marklevy" <markwlevy@gmail.com>
Sent: Sunday, March 29, 2009 10:30 AM
Subject: Yak-List: Re: RC Allen RCA2600 ADI
>
> Doc,
>
> Do you by chance have a pic of your panel with the Dynon fitted?
>
> Mark
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=236660#236660
>
>
>
Message 6
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| Subject: | Re: RC Allen RCA2600 ADI |
Did, will look for it and get it up loaded. If not tonight will take one of
it tomorrow and send it.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of marklevy
Sent: Sunday, March 29, 2009 10:30 AM
Subject: Yak-List: Re: RC Allen RCA2600 ADI
Doc,
Do you by chance have a pic of your panel with the Dynon fitted?
Mark
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=236660#236660
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