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rvtach
Joined: 28 Jan 2008 Posts: 26 Location: Tucson, AZ
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Posted: Sun Apr 14, 2019 6:20 am Post subject: Voltage regulator location |
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I am close to finishing the firewall forward wiring of my RV-7A project and have been able to find very little guidance on where to locate the external voltage regulators. There will be two VRs- a VR-166 for the B & C 60 amp alternator and the PMR1C for the SD-8. The only clear recommendation from B & C says the PMR1C should be mounted on a metal surface for heat dissipation in an area with good air circulation and that the case temperature should be kept below 175 degrees F.
So the choices are (1) Cabin side of the firewall where access is more difficult, cooling airflow likely minimal but ambient temperature is low or (2) engine side of the firewall where access is easier and likely lots of air swirling around (unconfirmed) but ambient temp is probably hotter.
Where do people put these things?
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_________________ Jim McChesney
Tucson, AZ
RV-7A Flying |
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heffnhane(at)mac.com Guest
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Posted: Sun Apr 14, 2019 7:00 am Post subject: Voltage regulator location |
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I mounted my two B&C regs in an RV14A onto the left side of the pilot’s position about at my left thigh.
Made some mounting plates to attach to two fuselage longerons.
Area is dry and realitively easy to access and does not interfere with my legs.
On Apr 14, 2019, at 10:20 AM, rvtach <rvtach(at)msn.com> wrote:
I am close to finishing the firewall forward wiring of my RV-7A project and have been able to find very little guidance on where to locate the external voltage regulators. There will be two VRs- a VR-166 for the B & C 60 amp alternator and the PMR1C for the SD-8. The only clear recommendation from B & C says the PMR1C should be mounted on a metal surface for heat dissipation in an area with good air circulation and that the case temperature should be kept below 175 degrees F.
So the choices are (1) Cabin side of the firewall where access is more difficult, cooling airflow likely minimal but ambient temperature is low or (2) engine side of the firewall where access is easier and likely lots of air swirling around (unconfirmed) but ambient temp is probably hotter.
Where do people put these things?
--------
Jim McChesney
Tucson, AZ
RV-7A Finishing Kit
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=488730#488730
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user9253
Joined: 28 Mar 2008 Posts: 1921 Location: Riley TWP Michigan
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Posted: Sun Apr 14, 2019 7:20 am Post subject: Re: Voltage regulator location |
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Be sure to use heat conductive paste between the regulator and mounting surface.
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_________________ Joe Gores |
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heffnhane(at)mac.com Guest
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Posted: Sun Apr 14, 2019 7:32 am Post subject: Voltage regulator location |
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Or, relieve the back-side of the mounting plate with a nice big hole for air circulation - there is more than a half inch clear space behind it to the external fuselage skin.
On Apr 14, 2019, at 11:20 AM, user9253 <fransew(at)gmail.com> wrote:
Be sure to use heat conductive paste between the regulator and mounting surface.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=488733#488733
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alec(at)alecmyers.com Guest
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Posted: Sun Apr 14, 2019 10:03 am Post subject: Voltage regulator location |
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I remember Bob saying that things aren’t especially hot forward of the forewall due to the cooling flow of air. Except sometimes immediately after landing.
Quote: | On Apr 14, 2019, at 11:31, Jeffrey C Warren <heffnhane(at)mac.com> wrote:
Or, relieve the back-side of the mounting plate with a nice big hole for air circulation - there is more than a half inch clear space behind it to the external fuselage skin.
On Apr 14, 2019, at 11:20 AM, user9253 <fransew(at)gmail.com> wrote:
Be sure to use heat conductive paste between the regulator and mounting surface.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=488733#488733
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pelletie1959(at)me.com Guest
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Posted: Sun Apr 14, 2019 12:46 pm Post subject: Voltage regulator location |
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Personnaly I put it que on the top of firewall and pour use a 12 bolts small compter fan. Works great. Ican send you picture uf you want.
Daniel Pelletier
Quote: | Le 14 avr. 2019 à 10:20, rvtach <rvtach(at)msn.com> a écrit :
I am close to finishing the firewall forward wiring of my RV-7A project and have been able to find very little guidance on where to locate the external voltage regulators. There will be two VRs- a VR-166 for the B & C 60 amp alternator and the PMR1C for the SD-8. The only clear recommendation from B & C says the PMR1C should be mounted on a metal surface for heat dissipation in an area with good air circulation and that the case temperature should be kept below 175 degrees F.
So the choices are (1) Cabin side of the firewall where access is more difficult, cooling airflow likely minimal but ambient temperature is low or (2) engine side of the firewall where access is easier and likely lots of air swirling around (unconfirmed) but ambient temp is probably hotter.
Where do people put these things?
--------
Jim McChesney
Tucson, AZ
RV-7A Finishing Kit
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=488730#488730
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