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Peer review, Z16 Rotax engine, Ducati Regulator

 
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velletazjp



Joined: 08 Oct 2019
Posts: 8

PostPosted: Wed Oct 07, 2020 11:11 am    Post subject: Peer review, Z16 Rotax engine, Ducati Regulator Reply with quote

Hi everybody

Many thanks for all the help I received when I designed the electric system for my Jodel's friend.

The plane is now airworthy and so far everything is working like a charm.

I now start helping an other fellow aviator who'w building an Aero101. He is a professional carpenter and the airplane is a true beauty but electicity is not he's strong skill.

I designed a very simple electric system, 90% inspired by bob's Z16.

Once again Bob [and all the other members of this forum], thanks for all the knowledge you're spreading...
My friend had 2 requirement that forced me to differ from Bob's design :

- he doesn't want to use a battery relay (I personally don't neither the load on the bus is less than 5Amp and a simple switch can handle that kind of current)

- he bought a rather expensive start key (see installation manual attached) that permits to turn ON the battery, select Ignition 1 and/or 2, and activate the stater. He don't want any other switches (unless safety mandates).

Initially, the supplier doesn't advised to install a OV disconnect relay, but I used Bob's design to adapt one on his airplane.
Please let me know if you see any flaws or improvement possible.
Many thanks


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user9253



Joined: 28 Mar 2008
Posts: 1906
Location: Riley TWP Michigan

PostPosted: Wed Oct 07, 2020 5:53 pm    Post subject: Re: Peer review, Z16 Rotax engine, Ducati Regulator Reply with quote

The crowbar module will short out the battery.
There is a long, always-hot wire connected between the battery and
terminal 1 of that expensive switch. In an accident, that wire could make
sparks and start a fire. A battery contactor can shut off power close to the battery.


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velletazjp



Joined: 08 Oct 2019
Posts: 8

PostPosted: Sat Oct 10, 2020 11:35 pm    Post subject: Re: Peer review, Z16 Rotax engine, Ducati Regulator Reply with quote

Thanks for your and Bob's wisdom...
Guess we're always learning...

I've taken into account the suggestion of the battery relay, explained the argument once again, leveled pros & cons but it still a no in this situation.

Moved the crow bar.
Should at least work as it's intended...


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velletazjp



Joined: 08 Oct 2019
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PostPosted: Wed Feb 24, 2021 12:44 am    Post subject: Re: Peer review, Z16 Rotax engine, Ducati Regulator Reply with quote

Hi guys

Project is moving forward except one step :

I can’t get my hand on a crowbar over voltage ( ref OVM-14 by BANDC ) unless I buy a complete kit ( which I don’t really need)

Does somebody knows where I could get one (AC spruce are out of stock) or does somebody have one in spare and would accept to send it to me ?
Thank you all

JP


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Ceengland



Joined: 11 Oct 2020
Posts: 378
Location: MS

PostPosted: Wed Feb 24, 2021 6:12 am    Post subject: Peer review, Z16 Rotax engine, Ducati Regulator Reply with quote

On Wed, Feb 24, 2021 at 2:49 AM velletazjp <velletazjp(at)gmail.com (velletazjp(at)gmail.com)> wrote:

Quote:
--> AeroElectric-List message posted by: "velletazjp" <velletazjp(at)gmail.com (velletazjp(at)gmail.com)>

Hi guys

Project is moving forward except one step :

I can’t get my hand on a crowbar over voltage ( ref OVM-14 by BANDC ) unless I buy a complete kit ( which I don’t really need)

Does somebody knows where I could get one (AC spruce are out of stock) or does somebody have one in spare and would accept to send it to me ?


Thank you all

JP
If you're willing to build your own, there are instructions on the AEC website. Or I can send you a copy, if that's easier.
Charlie 


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user9253



Joined: 28 Mar 2008
Posts: 1906
Location: Riley TWP Michigan

PostPosted: Wed Feb 24, 2021 4:01 pm    Post subject: Re: Peer review, Z16 Rotax engine, Ducati Regulator Reply with quote

Crowbar Over Voltage Circuit

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user9253



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Location: Riley TWP Michigan

PostPosted: Wed Feb 24, 2021 4:07 pm    Post subject: Re: Peer review, Z16 Rotax engine, Ducati Regulator Reply with quote

http://www.aeroelectric.com/DIY/DIY_Crowbar_OVP_F.pdf

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velletazjp



Joined: 08 Oct 2019
Posts: 8

PostPosted: Mon Mar 08, 2021 1:00 pm    Post subject: Re: Peer review, Z16 Rotax engine, Ducati Regulator Reply with quote

Thanks for the details.

Even tough learning new skills is always fun and educative, I would keep a DIY approach on last resort,

First, they seem to be readily available from B&C,
Second, it’s for a friend project, and I have no clue about elctronics etc, I’d rather spend some time on my on electric wiring,
Thank,
I’ll try b&c once again, and then task my father on the subject, he’s a retired electronic engineer, I’m sure he’ll understand all those little drawings 🤣


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