Today's Message Index:
----------------------
1. 08:28 AM - Impulse Coupler (Vernon Franklin)
2. 08:36 AM - Re: Impulse Coupler (John Miller)
3. 08:46 AM - Re: Impulse Coupler (Lenny Iszak)
4. 08:55 AM - Re: Impulse Coupler (Gary Specketer)
5. 09:05 AM - Re: Impulse Coupler (Jesse Saint)
6. 09:18 AM - Re: Impulse Coupler (Lenny Iszak)
7. 09:24 AM - Re: Re: Impulse Coupler (Kelly McMullen)
8. 09:34 AM - Re: Re: Impulse Coupler (Danny Riggs)
9. 09:43 AM - Re: Re: Impulse Coupler (Tim Olson)
10. 10:18 AM - Re: Impulse Coupler (Lenny Iszak)
11. 02:50 PM - Re: Re: Impulse Coupler (John Miller)
12. 04:32 PM - Re: Impulse Coupler (Bob Turner)
13. 04:44 PM - Re: Re: Impulse Coupler (Duane Wilson)
14. 05:23 PM - Re: Impulse Coupler (Bob Turner)
15. 05:31 PM - Re: Re: Impulse Coupler (gulf)
16. 06:02 PM - Re: Re: Impulse Coupler (Kelly McMullen)
17. 06:03 PM - Re: Re: Impulse Coupler (Jesse Saint)
18. 06:08 PM - Re: Re: Impulse Coupler (Jesse Saint)
19. 06:34 PM - Re: Re: Impulse Coupler (Rob Kermanj)
20. 06:57 PM - Vans shipped D4A5 engine (Doc)
Message 1
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I am having a hard time identifying the mag that has the impulse coupler.
On my Cherokee, I get a very distinct click when turning the prop over, it
is very easy to identify. But with this 540, I am not getting anything.
It is a stock D4A5 with factory installed slicks purchased through Vans.
Is there a chance that it shipped without a coupler? If so, is that going
to be an issue, and should I purchase one? Do I still ground out the right
mag on startup in such a scenario?
Thanks in advance!
--
Vernon Franklin
Message 2
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| Subject: | Re: Impulse Coupler |
It should be on your left mag, and you should be able to hear it by pulling the
prop through (with a plug out on each cylinder to make it easier to pull through).
Make sure your mag switch is OFF!
> On Mar 13, 2017, at 10:27 AM, Vernon Franklin <vernon.franklin@gmail.com> wrote:
>
> I am having a hard time identifying the mag that has the impulse coupler. On
my Cherokee, I get a very distinct click when turning the prop over, it is very
easy to identify. But with this 540, I am not getting anything.
>
> It is a stock D4A5 with factory installed slicks purchased through Vans.
> Is there a chance that it shipped without a coupler? If so, is that going to
be an issue, and should I purchase one? Do I still ground out the right mag
on startup in such a scenario?
>
> Thanks in advance!
>
>
> --
> Vernon Franklin
Message 3
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| Subject: | Re: Impulse Coupler |
Vernon,
Mine shipped with a retard breaker mag on the left. You'll need a Slick Start module
for starting, and wire using their diagrams.
--------
Lenny
N311LZ
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=467239#467239
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| Subject: | Re: Impulse Coupler |
The mag with impulse coupler will have a spacer between the accessory case
and the mag. Yes you need to ground out the non impulse mag for starting.
Gary
Get Outlook for iOS<https://aka.ms/o0ukef>
________________________________
From: owner-rv10-list-server@matronics.com <owner-rv10-list-server@matronic
s.com> on behalf of Vernon Franklin <vernon.franklin@gmail.com>
Sent: Monday, March 13, 2017 11:27:46 AM
Subject: RV10-List: Impulse Coupler
I am having a hard time identifying the mag that has the impulse coupler.
On my Cherokee, I get a very distinct click when turning the prop over, it
is very easy to identify. But with this 540, I am not getting anything.
It is a stock D4A5 with factory installed slicks purchased through Vans.
Is there a chance that it shipped without a coupler? If so, is that going
to be an issue, and should I purchase one? Do I still ground out the right
mag on startup in such a scenario?
Thanks in advance!
--
Vernon Franklin
Message 5
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| Subject: | Re: Impulse Coupler |
The stock engine from Vans does not have an impulse coupled mag. The left is a
retard breaker mag. You need a slick start. Yes, you need to ground the right
mag during start with the Slick Start.
Jesse Saint
Saint Aviation, Inc.
jesse@saintaviation.com
C: 352-427-0285
F: 815-377-3694
> On Mar 13, 2017, at 11:27 AM, Vernon Franklin <vernon.franklin@gmail.com> wrote:
>
> I am having a hard time identifying the mag that has the impulse coupler. On
my Cherokee, I get a very distinct click when turning the prop over, it is very
easy to identify. But with this 540, I am not getting anything.
>
> It is a stock D4A5 with factory installed slicks purchased through Vans.
> Is there a chance that it shipped without a coupler? If so, is that going to
be an issue, and should I purchase one? Do I still ground out the right mag
on startup in such a scenario?
>
> Thanks in advance!
>
>
> --
> Vernon Franklin
Message 6
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| Subject: | Re: Impulse Coupler |
According to this document from Lycoming, there are no approved impulse mags for
the D4A5.
https://www.lycoming.com/sites/default/files/SI1443L%20Approved%20Slick%20Magnetos.pdf
vernon.franklin(at)gmail. wrote:
> I am having a hard time identifying the mag that has the impulse coupler. On
my Cherokee, I get a very distinct click when turning the prop over, it is very
easy to identify. But with this 540, I am not getting anything.
>
>
> It is a stock D4A5 with factory installed slicks purchased through Vans.
> Is there a chance that it shipped without a coupler? If so, is that going to
be an issue, and should I purchase one? Do I still ground out the right mag on
startup in such a scenario?
>
>
> Thanks in advance!
>
>
> --
> Vernon Franklin
--------
Lenny
N311LZ
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=467242#467242
Message 7
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| Subject: | Re: Impulse Coupler |
Could investigate swap of your Slick mags for overhauled Bendix S-1200
mags with impulse coupling. Makes it a D4B5 with much better high
altitude performance. The S-1200 are the best mags ever made. My
rebuilder offered me new Slick or overhauled S-6 or S-1200 mags all at
same price. I took the 1200s. A little tight fit with oil breather tube,
otherwise fine.
On 3/13/2017 9:18 AM, Lenny Iszak wrote:
>
> According to this document from Lycoming, there are no approved impulse mags
for the D4A5.
>
> https://www.lycoming.com/sites/default/files/SI1443L%20Approved%20Slick%20Magnetos.pdf
>
>
> vernon.franklin(at)gmail. wrote:
>> I am having a hard time identifying the mag that has the impulse coupler. On
my Cherokee, I get a very distinct click when turning the prop over, it is very
easy to identify. But with this 540, I am not getting anything.
>>
>>
>> It is a stock D4A5 with factory installed slicks purchased through Vans.
>> Is there a chance that it shipped without a coupler? If so, is that going to
be an issue, and should I purchase one? Do I still ground out the right mag
on startup in such a scenario?
>>
>>
>> Thanks in advance!
>>
>>
>> --
>> Vernon Franklin
>
>
> --------
> Lenny
> N311LZ
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=467242#467242
>
>
Message 8
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| Subject: | Re: Impulse Coupler |
Put a Shower of Sparks on it. Easy to do and starts much better than impulse coupled
anyway anytime.
Sent from my iPhone
> On Mar 13, 2017, at 11:28 AM, Kelly McMullen <kellym@aviating.com> wrote:
>
>
> Could investigate swap of your Slick mags for overhauled Bendix S-1200 mags with
impulse coupling. Makes it a D4B5 with much better high altitude performance.
The S-1200 are the best mags ever made. My rebuilder offered me new Slick
or overhauled S-6 or S-1200 mags all at same price. I took the 1200s. A little
tight fit with oil breather tube, otherwise fine.
>
>> On 3/13/2017 9:18 AM, Lenny Iszak wrote:
>>
>> According to this document from Lycoming, there are no approved impulse mags
for the D4A5.
>>
>> https://www.lycoming.com/sites/default/files/SI1443L%20Approved%20Slick%20Magnetos.pdf
>>
>>
>>
>> vernon.franklin(at)gmail. wrote:
>>> I am having a hard time identifying the mag that has the impulse coupler.
On my Cherokee, I get a very distinct click when turning the prop over, it is
very easy to identify. But with this 540, I am not getting anything.
>>>
>>>
>>> It is a stock D4A5 with factory installed slicks purchased through Vans.
>>> Is there a chance that it shipped without a coupler? If so, is that going
to be an issue, and should I purchase one? Do I still ground out the right mag
on startup in such a scenario?
>>>
>>>
>>> Thanks in advance!
>>>
>>>
>>> --
>>> Vernon Franklin
>>
>>
>> --------
>> Lenny
>> N311LZ
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=467242#467242
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
Message 9
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| Subject: | Re: Impulse Coupler |
Or better yet put on electronic ignition...
> On Mar 13, 2017, at 11:33 AM, Danny Riggs <jdriggs49@MSN.COM> wrote:
>
>
> Put a Shower of Sparks on it. Easy to do and starts much better than impulse
coupled anyway anytime.
>
> Sent from my iPhone
>
>> On Mar 13, 2017, at 11:28 AM, Kelly McMullen <kellym@aviating.com> wrote:
>>
>>
>> Could investigate swap of your Slick mags for overhauled Bendix S-1200 mags
with impulse coupling. Makes it a D4B5 with much better high altitude performance.
The S-1200 are the best mags ever made. My rebuilder offered me new Slick
or overhauled S-6 or S-1200 mags all at same price. I took the 1200s. A little
tight fit with oil breather tube, otherwise fine.
>>
>>> On 3/13/2017 9:18 AM, Lenny Iszak wrote:
>>>
>>> According to this document from Lycoming, there are no approved impulse mags
for the D4A5.
>>>
>>> https://www.lycoming.com/sites/default/files/SI1443L%20Approved%20Slick%20Magnetos.pdf
>>>
>>>
>>>
>>> vernon.franklin(at)gmail. wrote:
>>>> I am having a hard time identifying the mag that has the impulse coupler.
On my Cherokee, I get a very distinct click when turning the prop over, it is
very easy to identify. But with this 540, I am not getting anything.
>>>>
>>>>
>>>> It is a stock D4A5 with factory installed slicks purchased through Vans.
>>>> Is there a chance that it shipped without a coupler? If so, is that going
to be an issue, and should I purchase one? Do I still ground out the right mag
on startup in such a scenario?
>>>>
>>>>
>>>> Thanks in advance!
>>>>
>>>>
>>>> --
>>>> Vernon Franklin
>>>
>>>
>>> --------
>>> Lenny
>>> N311LZ
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=467242#467242
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>
>
>
>
Message 10
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| Subject: | Re: Impulse Coupler |
Yep, when you consider the cost of the SlickStart and the money you get selling
the brand new mag with the harness, the EI upgrade is practically free.
After a few a couple of different ignition setups I ended up with the retard mag
and a Lightspeed Plasma. I'm starting on the Lightspeed only and grounding out
the retard mag. Starts like a car when cold, a bit finicky when hot, but i'm
embarrassing myself less and less lately with my hot starts :)
Tim Olson wrote:
> Or better yet put on electronic ignition...
>
--------
Lenny
N311LZ
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=467249#467249
Message 11
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| Subject: | Re: Impulse Coupler |
No true. I have one on the left mag. Installed 10yrs ago when Aerosport Power
built my engine.
grumpy
do not archive
> On Mar 13, 2017, at 11:18 AM, Lenny Iszak <lenard@rapiddecision.com> wrote:
>
>
> According to this document from Lycoming, there are no approved impulse mags
for the D4A5.
>
> https://www.lycoming.com/sites/default/files/SI1443L%20Approved%20Slick%20Magnetos.pdf
>
>
>
> vernon.franklin(at)gmail. wrote:
>> I am having a hard time identifying the mag that has the impulse coupler. On
my Cherokee, I get a very distinct click when turning the prop over, it is very
easy to identify. But with this 540, I am not getting anything.
>>
>>
>> It is a stock D4A5 with factory installed slicks purchased through Vans.
>> Is there a chance that it shipped without a coupler? If so, is that going to
be an issue, and should I purchase one? Do I still ground out the right mag
on startup in such a scenario?
>>
>>
>> Thanks in advance!
>>
>>
>> --
>> Vernon Franklin
>
>
> --------
> Lenny
> N311LZ
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=467242#467242
>
>
>
>
>
>
>
>
>
Message 12
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| Subject: | Re: Impulse Coupler |
I'm not sure if "approved" (implying anything else is "disapproved") is the right
word here. However, for the last 6 or 7 years Lycoming will not ship this engine
with Slick impulse mags, and that's where Vans gets theirs from. I think
this was in response to some SB or AD requiring frequent inspections of impulse
couplings.
Certainly, at least for a while, Vans' order form was a bit mis-leading, listing
the Slick start as "an option". It really is pretty much required, unless, as
others have said, you're going to ditch one or both mags for an electronic system.
gengrumpy wrote:
> No true. I have one on the left mag. Installed 10yrs ago when Aerosport Power
built my engine.
>
> grumpy
>
> do not archive
>
>
> > On Mar 13, 2017, at 11:18 AM, Lenny Iszak wrote:
> >
> >
> >
> > According to this document from Lycoming, there are no approved impulse mags
for the D4A5.
> >
> > https://www.lycoming.com/sites/default/files/SI1443L%20Approved%20Slick%20Magnetos.pdf
> >
> >
> >
> > vernon.franklin(at)gmail. wrote:
> > > I am having a hard time identifying the mag that has the impulse coupler.
On my Cherokee, I get a very distinct click when turning the prop over, it is
very easy to identify. But with this 540, I am not getting anything.
> > >
> > >
> > > It is a stock D4A5 with factory installed slicks purchased through Vans.
> > > Is there a chance that it shipped without a coupler? If so, is that going
to be an issue, and should I purchase one? Do I still ground out the right
mag on startup in such a scenario?
> > >
> > >
> > > Thanks in advance!
> > >
> > >
> > > --
> > > Vernon Franklin
> >
> >
> > --------
> > Lenny
> > N311LZ
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=467242#467242
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=467265#467265
Message 13
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| Subject: | Re: Impulse Coupler |
I dont understand the required part of this discussion. I have a Vans new experimental
Lycoming D4A5 without the Slick start option and I have never had any
trouble starting. What am I missing?
> On Mar 13, 2017, at 4:31 PM, Bob Turner <bobturner@alum.rpi.edu> wrote:
>
>
> I'm not sure if "approved" (implying anything else is "disapproved") is the right
word here. However, for the last 6 or 7 years Lycoming will not ship this
engine with Slick impulse mags, and that's where Vans gets theirs from. I think
this was in response to some SB or AD requiring frequent inspections of impulse
couplings.
>
> Certainly, at least for a while, Vans' order form was a bit mis-leading, listing
the Slick start as "an option". It really is pretty much required, unless,
as others have said, you're going to ditch one or both mags for an electronic
system.
>
>
>
>
>
> gengrumpy wrote:
>> No true. I have one on the left mag. Installed 10yrs ago when Aerosport Power
built my engine.
>>
>> grumpy
>>
>> do not archive
>>
>>
>>> On Mar 13, 2017, at 11:18 AM, Lenny Iszak wrote:
>>>
>>>
>>>
>>> According to this document from Lycoming, there are no approved impulse mags
for the D4A5.
>>>
>>> https://www.lycoming.com/sites/default/files/SI1443L%20Approved%20Slick%20Magnetos.pdf
>>>
>>>
>>>
>>> vernon.franklin(at)gmail. wrote:
>>>> I am having a hard time identifying the mag that has the impulse coupler.
On my Cherokee, I get a very distinct click when turning the prop over, it is
very easy to identify. But with this 540, I am not getting anything.
>>>>
>>>>
>>>> It is a stock D4A5 with factory installed slicks purchased through Vans.
>>>> Is there a chance that it shipped without a coupler? If so, is that going
to be an issue, and should I purchase one? Do I still ground out the right mag
on startup in such a scenario?
>>>>
>>>>
>>>> Thanks in advance!
>>>>
>>>>
>>>> --
>>>> Vernon Franklin
>>>
>>>
>>> --------
>>> Lenny
>>> N311LZ
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=467242#467242
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>
>
> --------
> Bob Turner
> RV-10 QB
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=467265#467265
>
>
>
>
>
>
>
>
>
Message 14
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| Subject: | Re: Impulse Coupler |
Most of the new starters really spin the engine with a good battery - enough to
generate a spark from the mag without the need of any augmentation. See if you
can find an old battery - one that barely spins the engine. And add in some
worn plugs, with gaps at their maximums instead of minimums. Does it still start?
Here's the real test: For safety, pull all the plugs. Hook up plug#1 to the harness,
and lay it on top of a cylinder where it has a good ground. Now slowly turn
the prop past TDC on #1. If you had an impulse mag you'd see it spark. With
no "slick start" you won't. Now repeat, but turn the prop faster and faster
until you see a spark. That's the minimum RPM you'll need to start the engine.
You'd probably find it hard to hand-prop this engine. But maybe that's a good thing?
duawil wrote:
> I dont understand the required part of this discussion. I have a Vans new experimental
Lycoming D4A5 without the Slick start option and I have never had any
trouble starting. What am I missing?
>
>
>
> > On Mar 13, 2017, at 4:31 PM, Bob Turner wrote:
> >
> >
> >
> > I'm not sure if "approved" (implying anything else is "disapproved") is the
right word here. However, for the last 6 or 7 years Lycoming will not ship this
engine with Slick impulse mags, and that's where Vans gets theirs from. I
think this was in response to some SB or AD requiring frequent inspections of
impulse couplings.
> >
> > Certainly, at least for a while, Vans' order form was a bit mis-leading, listing
the Slick start as "an option". It really is pretty much required, unless,
as others have said, you're going to ditch one or both mags for an electronic
system.
> >
> >
> >
> >
> >
> > gengrumpy wrote:
> > > No true. I have one on the left mag. Installed 10yrs ago when Aerosport
Power built my engine.
> > >
> > > grumpy
> > >
> > > do not archive
> > >
> > >
> > >> On Mar 13, 2017, at 11:18 AM, Lenny Iszak wrote:
> > >>
> > >>
> > >>
> > >> According to this document from Lycoming, there are no approved impulse
mags for the D4A5.
> > >>
> > >> https://www.lycoming.com/sites/default/files/SI1443L%20Approved%20Slick%20Magnetos.pdf
> > >>
> > >>
> > >>
> > >> vernon.franklin(at)gmail. wrote:
> > >>> I am having a hard time identifying the mag that has the impulse coupler.
On my Cherokee, I get a very distinct click when turning the prop over, it
is very easy to identify. But with this 540, I am not getting anything.
> > >>>
> > >>>
> > >>> It is a stock D4A5 with factory installed slicks purchased through Vans.
> > >>> Is there a chance that it shipped without a coupler? If so, is that going
to be an issue, and should I purchase one? Do I still ground out the right
mag on startup in such a scenario?
> > >>>
> > >>>
> > >>> Thanks in advance!
> > >>>
> > >>>
> > >>> --
> > >>> Vernon Franklin
> > >>
> > >>
> > >> --------
> > >> Lenny
> > >> N311LZ
> > >>
> > >>
> > >>
> > >>
> > >> Read this topic online here:
> > >>
> > >> http://forums.matronics.com/viewtopic.php?p=467242#467242
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >
> >
> >
> > --------
> > Bob Turner
> > RV-10 QB
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=467265#467265
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=467267#467267
Message 15
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| Subject: | Re: Impulse Coupler |
I purchased in 2013 engine from Lycoming Thunderbolt and they provided
Slicks
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Bob Turner
Sent: Monday, March 13, 2017 4:32 PM
Subject: RV10-List: Re: Impulse Coupler
I'm not sure if "approved" (implying anything else is "disapproved") is the
right word here. However, for the last 6 or 7 years Lycoming will not ship
this engine with Slick impulse mags, and that's where Vans gets theirs from.
I think this was in response to some SB or AD requiring frequent inspections
of impulse couplings.
Certainly, at least for a while, Vans' order form was a bit mis-leading,
listing the Slick start as "an option". It really is pretty much required,
unless, as others have said, you're going to ditch one or both mags for an
electronic system.
gengrumpy wrote:
> No true. I have one on the left mag. Installed 10yrs ago when Aerosport
Power built my engine.
>
> grumpy
>
> do not archive
>
>
> > On Mar 13, 2017, at 11:18 AM, Lenny Iszak wrote:
> >
> >
> >
> > According to this document from Lycoming, there are no approved impulse
mags for the D4A5.
> >
> >
> > https://www.lycoming.com/sites/default/files/SI1443L%20Approved%20Sl
> > ick%20Magnetos.pdf
> >
> >
> >
> > vernon.franklin(at)gmail. wrote:
> > > I am having a hard time identifying the mag that has the impulse
> > > coupler. On my Cherokee, I get a very distinct click when
> > > turning the prop over, it is very easy to identify. But with
> > > this 540, I am not getting anything.
> > >
> > >
> > > It is a stock D4A5 with factory installed slicks purchased through
> > > Vans. Is there a chance that it shipped without a coupler? If
so, is that going to be an issue, and should I purchase one? Do I still
ground out the right mag on startup in such a scenario?
> > >
> > >
> > > Thanks in advance!
> > >
> > >
> > > --
> > > Vernon Franklin
> >
> >
> > --------
> > Lenny
> > N311LZ
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=467242#467242
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=467265#467265
Message 16
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| Subject: | Re: Impulse Coupler |
It isn't the brand, it is the specific model number of the mag whether
it has impulse coupling or not. If it has a properly working impluse,
you can't miss the snap when it releases. If it doesn't have it, the
engine will be difficult to start on stock 25 degree timing instead of TDC.
On 3/13/2017 5:27 PM, gulf wrote:
>
> I purchased in 2013 engine from Lycoming Thunderbolt and they provided
> Slicks
>
> -----Original Message-----
> From: owner-rv10-list-server@matronics.com
> [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Bob Turner
> Sent: Monday, March 13, 2017 4:32 PM
> To: rv10-list@matronics.com
> Subject: RV10-List: Re: Impulse Coupler
>
>
> I'm not sure if "approved" (implying anything else is "disapproved") is the
> right word here. However, for the last 6 or 7 years Lycoming will not ship
> this engine with Slick impulse mags, and that's where Vans gets theirs from.
> I think this was in response to some SB or AD requiring frequent inspections
> of impulse couplings.
>
> Certainly, at least for a while, Vans' order form was a bit mis-leading,
> listing the Slick start as "an option". It really is pretty much required,
> unless, as others have said, you're going to ditch one or both mags for an
> electronic system.
>
>
> gengrumpy wrote:
>> No true. I have one on the left mag. Installed 10yrs ago when Aerosport
> Power built my engine.
>>
>> grumpy
>>
>> do not archive
>>
>>
>>> On Mar 13, 2017, at 11:18 AM, Lenny Iszak wrote:
>>>
>>>
>>>
>>> According to this document from Lycoming, there are no approved impulse
> mags for the D4A5.
>>>
>>>
>>> https://www.lycoming.com/sites/default/files/SI1443L%20Approved%20Sl
>>> ick%20Magnetos.pdf
>>>
>>>
>>>
>>> vernon.franklin(at)gmail. wrote:
>>>> I am having a hard time identifying the mag that has the impulse
>>>> coupler. On my Cherokee, I get a very distinct click when
>>>> turning the prop over, it is very easy to identify. But with
>>>> this 540, I am not getting anything.
>>>>
>>>>
>>>> It is a stock D4A5 with factory installed slicks purchased through
>>>> Vans. Is there a chance that it shipped without a coupler? If
> so, is that going to be an issue, and should I purchase one? Do I still
> ground out the right mag on startup in such a scenario?
>>>>
>>>>
>>>> Thanks in advance!
>>>>
>>>>
>>>> --
>>>> Vernon Franklin
>>>
>>>
>>> --------
>>> Lenny
>>> N311LZ
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=467242#467242
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>
>
> --------
> Bob Turner
> RV-10 QB
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=467265#467265
>
>
Message 17
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| Subject: | Re: Impulse Coupler |
Approved, no. Installed, yes. Aerosport, Mattituck and probably others installed
impulse coupled mags, but never Van's.
Jesse Saint
Saint Aviation, Inc.
352-427-0285
jesse@saintaviation.com
Sent from my iPad
> On Mar 13, 2017, at 5:49 PM, John Miller <gengrumpy@aol.com> wrote:
>
>
> No true. I have one on the left mag. Installed 10yrs ago when Aerosport Power
built my engine.
>
> grumpy
>
> do not archive
>
>> On Mar 13, 2017, at 11:18 AM, Lenny Iszak <lenard@rapiddecision.com> wrote:
>>
>>
>> According to this document from Lycoming, there are no approved impulse mags
for the D4A5.
>>
>> https://www.lycoming.com/sites/default/files/SI1443L%20Approved%20Slick%20Magnetos.pdf
>>
>>
>>
>> vernon.franklin(at)gmail. wrote:
>>> I am having a hard time identifying the mag that has the impulse coupler.
On my Cherokee, I get a very distinct click when turning the prop over, it is
very easy to identify. But with this 540, I am not getting anything.
>>>
>>>
>>> It is a stock D4A5 with factory installed slicks purchased through Vans.
>>> Is there a chance that it shipped without a coupler? If so, is that going
to be an issue, and should I purchase one? Do I still ground out the right mag
on startup in such a scenario?
>>>
>>>
>>> Thanks in advance!
>>>
>>>
>>> --
>>> Vernon Franklin
>>
>>
>> --------
>> Lenny
>> N311LZ
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=467242#467242
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
Message 18
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| Subject: | Re: Impulse Coupler |
We had an RV-10 that started and ran fine for a year or two without a Slick Start.
Then, I taxied to the pumps once and it wouldn't start after I pumped gas.
I waited for an hour and it fired right up (after charging the battery back up).
This happened a number of times before we could get the Slick Start installed.
Never a problem again. If only cold starting with a good battery, not a problem.
Hot starting without Slick Start is virtually impossible. The owner of
his one never did a hot start. He flew somewhere and had a meeting for a while
before trying to start again. He always had it fueled at his hangar by the fuel
truck. It wasn't until that time I taxied to the pumps that I realized there
wasn't an impulse coupling.
The main danger of no Slick Start is probably a kickback by firing at base timing
instead of TDC, which the retard breaker does through the Slick Start. That's
also why normal mags are grounded during start with the R mag ground jumper
on a standard key switch. Not really common, but can happen.
Jesse Saint
Saint Aviation, Inc.
352-427-0285
jesse@saintaviation.com
Sent from my iPad
> On Mar 13, 2017, at 8:21 PM, Bob Turner <bobturner@alum.rpi.edu> wrote:
>
>
> Most of the new starters really spin the engine with a good battery - enough
to generate a spark from the mag without the need of any augmentation. See if
you can find an old battery - one that barely spins the engine. And add in some
worn plugs, with gaps at their maximums instead of minimums. Does it still start?
> Here's the real test: For safety, pull all the plugs. Hook up plug#1 to the harness,
and lay it on top of a cylinder where it has a good ground. Now slowly
turn the prop past TDC on #1. If you had an impulse mag you'd see it spark. With
no "slick start" you won't. Now repeat, but turn the prop faster and faster
until you see a spark. That's the minimum RPM you'll need to start the engine.
> You'd probably find it hard to hand-prop this engine. But maybe that's a good
thing?
>
>
>
> duawil wrote:
>> I dont understand the required part of this discussion. I have a Vans new experimental
Lycoming D4A5 without the Slick start option and I have never had any
trouble starting. What am I missing?
>>
>>
>>
>>> On Mar 13, 2017, at 4:31 PM, Bob Turner wrote:
>>>
>>>
>>>
>>> I'm not sure if "approved" (implying anything else is "disapproved") is the
right word here. However, for the last 6 or 7 years Lycoming will not ship this
engine with Slick impulse mags, and that's where Vans gets theirs from. I think
this was in response to some SB or AD requiring frequent inspections of impulse
couplings.
>>>
>>> Certainly, at least for a while, Vans' order form was a bit mis-leading, listing
the Slick start as "an option". It really is pretty much required, unless,
as others have said, you're going to ditch one or both mags for an electronic
system.
>>>
>>>
>>>
>>>
>>>
>>> gengrumpy wrote:
>>>> No true. I have one on the left mag. Installed 10yrs ago when Aerosport
Power built my engine.
>>>>
>>>> grumpy
>>>>
>>>> do not archive
>>>>
>>>>
>>>>> On Mar 13, 2017, at 11:18 AM, Lenny Iszak wrote:
>>>>>
>>>>>
>>>>>
>>>>> According to this document from Lycoming, there are no approved impulse mags
for the D4A5.
>>>>>
>>>>> https://www.lycoming.com/sites/default/files/SI1443L%20Approved%20Slick%20Magnetos.pdf
>>>>>
>>>>>
>>>>>
>>>>> vernon.franklin(at)gmail. wrote:
>>>>>> I am having a hard time identifying the mag that has the impulse coupler.
On my Cherokee, I get a very distinct click when turning the prop over, it
is very easy to identify. But with this 540, I am not getting anything.
>>>>>>
>>>>>>
>>>>>> It is a stock D4A5 with factory installed slicks purchased through Vans.
>>>>>> Is there a chance that it shipped without a coupler? If so, is that going
to be an issue, and should I purchase one? Do I still ground out the right
mag on startup in such a scenario?
>>>>>>
>>>>>>
>>>>>> Thanks in advance!
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Vernon Franklin
>>>>>
>>>>>
>>>>> --------
>>>>> Lenny
>>>>> N311LZ
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Read this topic online here:
>>>>>
>>>>> http://forums.matronics.com/viewtopic.php?p=467242#467242
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>>
>>> --------
>>> Bob Turner
>>> RV-10 QB
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=467265#467265
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>
>
> --------
> Bob Turner
> RV-10 QB
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=467267#467267
>
>
>
>
>
>
>
>
>
Message 19
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| Subject: | Re: Impulse Coupler |
I had the same set up. After a while, it gets harder and harder to start. In fact
it nearly refused to start one day and that is how I realized I did not have
an impulse coupled mag. Put a shower of sparks and all is good.
Do not archive.
Sent from my iPhone
> On Mar 13, 2017, at 7:43 PM, Duane Wilson <aaa@pacifier.com> wrote:
>
>
> I dont understand the required part of this discussion. I have a Vans new experimental
Lycoming D4A5 without the Slick start option and I have never had any
trouble starting. What am I missing?
>
>
>> On Mar 13, 2017, at 4:31 PM, Bob Turner <bobturner@alum.rpi.edu> wrote:
>>
>>
>> I'm not sure if "approved" (implying anything else is "disapproved") is the
right word here. However, for the last 6 or 7 years Lycoming will not ship this
engine with Slick impulse mags, and that's where Vans gets theirs from. I think
this was in response to some SB or AD requiring frequent inspections of impulse
couplings.
>>
>> Certainly, at least for a while, Vans' order form was a bit mis-leading, listing
the Slick start as "an option". It really is pretty much required, unless,
as others have said, you're going to ditch one or both mags for an electronic
system.
>>
>>
>>
>>
>>
>> gengrumpy wrote:
>>> No true. I have one on the left mag. Installed 10yrs ago when Aerosport Power
built my engine.
>>>
>>> grumpy
>>>
>>> do not archive
>>>
>>>
>>>> On Mar 13, 2017, at 11:18 AM, Lenny Iszak wrote:
>>>>
>>>>
>>>>
>>>> According to this document from Lycoming, there are no approved impulse mags
for the D4A5.
>>>>
>>>> https://www.lycoming.com/sites/default/files/SI1443L%20Approved%20Slick%20Magnetos.pdf
>>>>
>>>>
>>>>
>>>> vernon.franklin(at)gmail. wrote:
>>>>> I am having a hard time identifying the mag that has the impulse coupler.
On my Cherokee, I get a very distinct click when turning the prop over, it is
very easy to identify. But with this 540, I am not getting anything.
>>>>>
>>>>>
>>>>> It is a stock D4A5 with factory installed slicks purchased through Vans.
>>>>> Is there a chance that it shipped without a coupler? If so, is that going
to be an issue, and should I purchase one? Do I still ground out the right
mag on startup in such a scenario?
>>>>>
>>>>>
>>>>> Thanks in advance!
>>>>>
>>>>>
>>>>> --
>>>>> Vernon Franklin
>>>>
>>>>
>>>> --------
>>>> Lenny
>>>> N311LZ
>>>>
>>>>
>>>>
>>>>
>>>> Read this topic online here:
>>>>
>>>> http://forums.matronics.com/viewtopic.php?p=467242#467242
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>
>>
>> --------
>> Bob Turner
>> RV-10 QB
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=467265#467265
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
Message 20
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| Subject: | Vans shipped D4A5 engine |
We installed a factory new D4A5 when we built (2012). It has a
6393 Slick Mag on the Left side and a 6350 on the Right side (no impulse
couplings). Had no problem starting cold or hot (except for leaving the
mixture out when engine hot until it fires--2-3 seconds, and then
enriching the mixture) until we had about 270 hours on the new engine.
Started to be hard to start, especially when hot, then. A couple
flights later it ran a little rough with the Left Mag check at run up.
Put in new plugs in spite of the original plugs checking out good,
gapped and cleaned,etc. Still hard to start, even when cold. Pulled
Left Mag and had it "rebuilt-repaired" ($375). Starts immediately
now--just a couple turns of the prop. Still use the hot start routine
(Fuel mixture lean until fires) which they tell me is indicative of
D4A5's. N123CV #41087 Doc
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