Hello,
I think you're looking at the wrong side of the switch's use. The most
important part of this particular switch is the ability to isolate the
magneto from the ground when the engine is running, because we want the
engine to run and keep on running. This particular switch is selected
because of its _isolating_ abilities approved by aircraft authorities.
So do not search for another switch than the one prescribed in the
parts-list.
Best regards
Guy
Op 16-07-17 om 20:23 schreef Michael Stockhill:
For what it is worth, the mag switches on my Aztec with similar
magnetos are rated at 6 amps 125V a.c./dc. The p lead grounds the
primary coil. I found one source that says the primary coil puts out
about 150 volts. The secondary coil puts out 10-15000 Volts. 40 amp or
even 20 amp rated switch looks like overkill for whatever reason.
Maybe consevative because we only get one of them.
Michael
On Jul 15, 2017 1:29 AM, "Laurie Hoffman via dog"
<[email protected] <mailto:[email protected]>> wrote:
Hi Tom and Mike,
Rob and I have the wreck of an H36 from which we have salvaged
many parts for our functioning H36, especially the L2400 which we
had top overhauled.
Tom, I gritted my teeth and dived back into the wreck to recover
the ignition switch and a panel switch. The wreck is already well
dismantled however I still had a cow of a job getting access to
the switches and removing these. I dread to think how much time it
would take to install a new switch in the original position in a
complete panel. My strong recommendation is that if you have an
ignition switch failure seriously consider installing a new switch
in another location on the panel, simply reroute the wiring from
the old to the new and then cover up the old switch and placard
the new.
Although psychically the switch toggles and bodies appear the
same, the switches have a very different rating. The panel switch
is rated 15A while the ignition switch is rated 40A!
The link that you posted to a new switch I just noticed is only
rated 20A. Maybe something like this one Tom....
Longacre 45423 40 Amp Weatherproof Toggle switch #1731 | eBay
<http://www.ebay.com.au/itm/Longacre-45423-40-Amp-Weatherproof-Toggle-switch-1731-/272686767789?epid=708201179&hash=item3f7d65dead:g:4QcAAOSw%7EFJZJvde>
$ 22.95
Longacre 45423 40 Amp Weatherproof Toggle switch #1731 | eBay
Longacre 45423 40 Amp Weatherproof Toggle switch #1731 in | eBay!
<http://www.ebay.com.au/itm/Longacre-45423-40-Amp-Weatherproof-Toggle-switch-1731-/272686767789?epid=708201179&hash=item3f7d65dead:g:4QcAAOSw%7EFJZJvde>
In Oz I have found Narva (driving light manufacturers) switches
which look suitable. Heavy duty and this one rated at 50A for 12v.
Heavy Duty - Products - Narva
<http://www.narva.com.au/products/browse/heavy-duty-2>
Heavy Duty - Products - Narva
<http://www.narva.com.au/products/browse/heavy-duty-2>
The wreck is a Mk2 by the way while our operational H36 is a Mk1
so if anyone needs a good Mk2 wing or two, let us know!
Re hydraulic fluid, we use only OM16 which I gather is equivalent
to 5606.
Best Regards
Laurie
*
*
------------------------------------------------------------------------
*From:* Michael Stockhill <[email protected] <mailto:[email protected]>>
*To:* [email protected] <mailto:[email protected]>
*Sent:* Saturday, 15 July 2017, 10:13
*Subject:* Re: [DOG mailing list] H36 Ignition Switch (and brakes)
Hi Tom et al
I think I found that the MS O rings are okay. Mine were fine
through two rebuilds (preventative maintenance each time I put on
new tires) over 16 years.
Mike
On Jul 14, 2017 10:01 AM, "Tom Preisser" <[email protected]
<mailto:[email protected]>> wrote:
Hi Laurie,
I have what I believe to be an ignition switch in my spares.
Can't be positive without digging behind the panel to look
at my installed switch, but you can check your removed switch
against it. The spec is MS 35058-22 http://www.bandc.aero/
toggleswitch-MS35058-22.aspx
<http://www.bandc.aero/toggleswitch-MS35058-22.aspx>
And I think it could be a different spec to the other fuel
pump, etc switches (beefier), given that it has a separate
entry than the 15A switches in the old H36 parts manual (with
part numbers no longer valid for Diamond)...
BTW on brakes (and thanks Mike for your advice)... just now
installing a new caliper piston which makes the O ring fit
much better in the cylinder (seems I had to take off too much
corroded material from the groove of the original
installed one, so it no longer sealed tightly)...
For those of you running DOT3 fluid, I have obtained some EPDM
O-rings to use rather than the BNR (nitrile) MS-28775-218
O-rings supplied to me by Diamond (which they may have sent
probably because the HK36 and DA20 use 5606 aviation brake
fluid). See this RAS thread for the details on why BNR is not
suitable for DOT3...
https://groups.google.com/ forum/#!topic/rec.aviation.
soaring/4MiwHrkryFg
<https://groups.google.com/forum/#%21topic/rec.aviation.soaring/4MiwHrkryFg>
And I talked to a lady who has worked at Cleveland Brakes for
decades, and she gasped!! when I said that Hoffmann used DOT3.
She says Cleveland only recommends aviation brake fluid - but
I'm sticking with DOT3 as per the US type certificate!
Cheers,
Tom
On Thu, Jul 13, 2017 at 7:26 PM, Laurie Hoffman via dog
<[email protected]
<mailto:[email protected]>> wrote:
Hi All,
After extensive investigation into intermittent electrical
problems eventually developing into a situation where the
motor had to be shut down in flight due to rough running,
it appears that the culprit is the ignition switch.
Physically, the switch appears identical to the other
original panel toggle switches operating fuel pump,
avionics, strobe etc.
Does anyone know if they are the same switch and also is
there anyone out there in DOG land who might have specs
for the switches?
Best Regards
Laurie
*
*
/
/
------------------------------------------------------------------------
*From:* Greg Wilson <[email protected]
<mailto:[email protected]>>
*To:* [email protected]
<mailto:[email protected]>
*Sent:* Sunday, 18 June 2017, 8:10
*Subject:* [DOG mailing list] Easy fit ADSB
These are a very easy install and cheap too.
https://www.recreationalflying
.com/threads/wow-these-are-goo d-looking-gadjets.161803/
<https://www.recreationalflying.com/threads/wow-these-are-good-looking-gadjets.161803/>
Greg Wilson
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