Today's Message Index:
----------------------
1. 05:44 AM - Re: AC current reading for Revmaster engine (dj_theis)
2. 06:37 AM - Regulator location (dj_theis)
3. 07:00 AM - Re: Regulator location (Art Zemon)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: AC current reading for Revmaster engine |
> Checking the DC current after the voltage regulator would not be as indicative
since there would be some loss in the regulator and if the regulator is the
shunt type DC current would not represent what the stator is actually producing.
Ive measured and analyzed the Revmaster charge system numerous ways. The OEM regulator
is NOT a shunt regulator. Trying to measure the AC current will provide
absolutely no advantage (unless you are replacing the original regulator with
a shunt,). A shunt regulator will effectively double the heating of the worst
case charging (the original regulator is a half wave, not a full wave). I
would strongly advocate using the original equipment regulator. And definitely
not installing a shunt regulator.
This charge system has (at least) 4 flaws. 1) low air flow/cooling. 2) erroneous
stator design with magnetically saturated laminates. 3) no resin coating infusion
on the windings 4) low air flow/cooling.
I injected DC current from a lab supply through the stator winding on the bench
and measured the rise in temperature of the surface of the stator wire and the
center laminate steel. Ive concluded that continuous DC at 15 amps with an
ambient temperature of 100 F will not create a temperature rise that is damaging
(steady state of below 140 F). I can forward the temperature curves if anyone
is interested.
Increasing air flow is job 1, wrt cooling this stator. Impregnating the wiring
is an improvement that I advocate but do not have data on it. My direct conversation
with the stator wire manufacturer, and their recommendation suggests
to me it would be an improvement. I can share the method of impregnating the
stator wiring that Im using with the web, but Im reluctant to advertise this
until I can verify there is no damage to the ignition coils. Ive tested impregnation
on the stator coils but the locally mounted ignition coil wire is different
(much smaller and from an unknown supplier).
Hope this helps,
Dan
--------
Dan Theis
Scratch building Sonex #1362
Still working on the Revmaster Alternator improvement
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=507925#507925
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Regulator location |
Ive been trading emails with another builder and they asked my thoughts on the
location of the ships voltage regulator. What are the pros and cons to mounting
the regulator on the occupant side of the firewall.
My thoughts are below but I think this is a question better served by this forum
than my opinion.
Pros:
Likely cooler environment (although you might not appreciate the added heat in
the summer).
Cons:
Harder to find blast air for cooling
The high voltage AC wires are routed through a longer path (65 VAC open circuit)
Ive never seen this done on certified aircraft or land vehicles. (Maybe not a good
reason but something to consider)
If they do go up in smoke you will be breathing that smoke.
Can the forum comment additionally?
Thanks,
Dan
--------
Dan Theis
Scratch building Sonex #1362
Still working on the Revmaster Alternator improvement
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=507926#507926
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Regulator location |
Dan,
I installed B&C Aero regulators. The installation instructions specifically
state that they are to be installed on the cockpit side of the firewall,
not in the engine compartment.
-- Art Z.
On Fri, Sep 23, 2022 at 8:49 AM dj_theis <djtheis58@gmail.com> wrote:
>
> I=99ve been trading emails with another builder and they asked my t
houghts
> on the location of the ship=99s voltage regulator. =9CWhat a
re the pros and
> cons to mounting the regulator on the occupant side of the firewall.
=9D
>
> My thoughts are below but I think this is a question better served by thi
s
> forum than my opinion.
>
> Pros:
> Likely cooler environment (although you might not appreciate the added
> heat in the summer).
>
> Cons:
> Harder to find blast air for cooling
> The high voltage AC wires are routed through a longer path (65 VAC open
> circuit)
> I=99ve never seen this done on certified aircraft or land vehicles.
(Maybe
> not a good reason but something to consider)
> If they do go up in smoke you will be breathing that smoke.
>
> Can the forum comment additionally?
>
> Thanks,
>
> Dan
--
My blog: CheerfulCurmudgeon.com
*=9CWe are all visitors to this time, this place. Our purpose here is
to
observe, to learn, to grow, to love ... and then we return home.=9D -
- Queen
Elizabeth II*
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|