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Fergus Kyle
Joined: 03 Jun 2007 Posts: 291 Location: Burlington ON Canada
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Posted: Tue Mar 17, 2009 7:04 am Post subject: Grounding strap,firewall-914 engine |
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Cheers,
I may have made a tactical error - in running the grounding strap
from my 'forest-of-tabs' on the firewall to an M6x16 bolt holding the
plastic ignition cover on the back of the engine. Admittedly, the bolt
threads into the ignition housing but now I'm having nervous thoughts about
the cover.
Where did you ground your strap to the engine?
Thanks, ferg
Europa A064
Wiring wiring wiring
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Ivor Phillips
Joined: 16 Jan 2006 Posts: 253 Location: London UK
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Posted: Tue Mar 17, 2009 10:23 am Post subject: Grounding strap,firewall-914 engine |
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hi Ferg
I used the large threaded holes on top of the engine just behind the Vacuum pump,
These are used to lift the engine at its point of balance, If you use a good quality welding cable with swaged joints it would be a fit and forget item,,
regards
ivor
---- Fergus Kyle <VE3LVO(at)rac.ca> wrote:
Quote: | Cheers,
I may have made a tactical error - in running the grounding strap
from my 'forest-of-tabs' on the firewall to an M6x16 bolt holding the
plastic ignition cover on the back of the engine. Admittedly, the bolt
threads into the ignition housing but now I'm having nervous thoughts about
the cover.
Where did you ground your strap to the engine?
Thanks, ferg
Europa A064
Wiring wiring wiring
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simon.a.smith(at)mac.com Guest
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Posted: Tue Mar 17, 2009 12:05 pm Post subject: Grounding strap,firewall-914 engine |
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Those points are used for the attachment of part of the prop control
system with the Arplast prop and are hidden if the cooling shroud is
fitted.
I used a threaded lug next to the rocker cover on the rear righthand
(looking from the cockpit) cylinder.
Simon
On 17 Mar 2009, at 18:17, ivor.phillips(at)ntlworld.com wrote:
Quote: |
hi Ferg
I used the large threaded holes on top of the engine just behind the
Vacuum pump,
These are used to lift the engine at its point of balance, If you
use a good quality welding cable with swaged joints it would be a
fit and forget item,,
regards
ivor
---- Fergus Kyle <VE3LVO(at)rac.ca> wrote:
> Cheers,
> I may have made a tactical error - in running the grounding strap
> from my 'forest-of-tabs' on the firewall to an M6x16 bolt holding
> the
> plastic ignition cover on the back of the engine. Admittedly, the
> bolt
> threads into the ignition housing but now I'm having nervous
> thoughts about
> the cover.
> Where did you ground your strap to the engine?
> Thanks, ferg
> Europa A064
> Wiring wiring wiring
>
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ptag.dev(at)tiscali.co.uk Guest
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Posted: Tue Mar 17, 2009 12:51 pm Post subject: Grounding strap,firewall-914 engine |
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Hi! Ferg
I used a substantial threaded boss on the lower port side of the crank case just below and aft of the oil filter. (914 installation.)
Regards
Bob Harrison G-PTAG [list][list]
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budyerly(at)msn.com Guest
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Posted: Tue Mar 17, 2009 2:33 pm Post subject: Grounding strap,firewall-914 engine |
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<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Ferg,
I know you have already looked at the Tony Bingalis "Firewall Forward and or Knuckles AeroElectric Connection, but for others:
Please use standard aircraft wiring procedures to secure a suitably sized wire from the engine block to the airframe to handle engine starter grounding amperage requirements, instrument grounding and accessories (I use a short #4 cable minimum). No matter what, make sure the wire ring connector is solidly in contact with the block/head of the engine.
In the past I used the M6 bolt that the bracket coming off the engine block, which holds the ignition coil boxes, however on the new Rotax engines make that area harder to get to.
My new two favorite places to make a ground contact are:
The engine lift points behind the gearbox or in the hole on the #4 engine cylinder near the head bolt.
They all worked fine.
I run my main battery ground to a 5/16 stud through the firewall, and from this point to the block, and on the inside of the firewall I run a #10 wire to the panel/airframe for a low power panel or a #8 for a high power panel.
Bud Yerly
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kevann(at)gotsky.com Guest
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Posted: Tue Mar 17, 2009 7:35 pm Post subject: Grounding strap,firewall-914 engine |
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Ferg,
I put mine at the brace that supports the ignition module. The engine case
has a nice big flat machined area there
Kevin
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