Today's Message Index:
----------------------
1. 12:10 AM - Re: OVP crowbar false triggering (Thomas Johnson)
2. 06:23 AM - Re: OVP, Alternators, and stuff (Eric M. Jones)
3. 06:28 PM - Dual Fuel Pumps and EFI (John Burnaby)
4. 06:28 PM - Dual Fuel Pumps and EFI (John Burnaby)
Message 1
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| Subject: | Re: OVP crowbar false triggering |
--> AeroElectric-List message posted by: "Thomas Johnson" <trj01@comcast.net>
Bob N,
I would be delighted to put my hands on your airplane with some test equipment
to see if we can understand why it's so different.
I would like that too but I am in SoCal and you are not (COME ON OUT! I'll buy
lunch!). What do you think is the minimum requirement for test equipment to
get some useful data on this? I think the answer will be "more than I can afford"
but it does not hurt to ask.
Do you still have the old module? If so, you can send it back to me for a no-charge
upgrade.
Yes, I have all of them. I built four but it was really 2 X 2 versions. I will
round them up and send them to the address on your web site if I don't hear
otherwise. I do not need you to send replacements for my sake, I am quite happy
with the "MOS-FET miracle" I am flying now. I would be willing try out new
versions in my airplane and report the results.
to see which one is the "rose wood stake".
Please forgive my ignorance. I know what a "rosetta stone" is, but I do not know
what "rose wood stake" means. It always hurts to ask this kind of question
but if I don't ask I will never know.
Tom Johnson
Message 2
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| Subject: | Re: OVP, Alternators, and stuff |
0.60 COMMA_SUBJECT Subject is like 'Re: FDSDS, this is a subject'
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
--> AeroElectric-List message posted by: plaurence@the-beach.net
>> --> AeroElectric-List message posted by: "Eric M. Jones"
>> <emjones@charter.net>
>>
>> --> AeroElectric-List message posted by: Mickey Coggins
>> <mick-matronics@rv8.ch>
>>
>> one is the only one you need. When you consider it, the race car
>> battery switches are better than battery contactor; the starter
>> contactor is only used to allow the use of a wimpy ignition
>> keyswitch;...........Eric
>What manly keyswitch would use for the starter?
I don't know of a 300A keyswitch either. I meant to imply that using a
separate manual switch for starting might be better.
>Also, I believe the contactor is used so that in case the solenoid sticks
>and the ring gear remains engaged, there is no power to the starter...Peter
In that case powering down the whole system might be better. Many starters
use a built-in solenoid, and I'd go with one of those. Again a stuck starter
would mean powering down.
--> AeroElectric-List message posted by: Mickey Coggins
<mick-matronics@rv8.ch>
>> approach is to eliminate all the other contactors anyway so this one is
>> the
>> only one you need. When you consider it, the race car battery switches
>> are
>> better than battery contactor; ...Eric
>Sounds interesting. Do you have one you recommend, and will they
>work for rear mounted batteries? I've already got mine hooked up
>with standard contactors, but it's always fun to learn something
>new.
I don't know the best one. Perhaps the Aeroelectric minions can find the
best one. But start with the battery disconnects from Flaming-River.com (
http://www.flamingriver.com/index.cfm/page/ptype=results/Category_ID=133/home_id=76/mode=cat/cat133.htm )
would probably work. I am still in search mode on this.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
(508) 764-2072
"Nothing is too wonderful to be true."
James Clerk Maxwell, discoverer of electromagnetism
"Too much of a good thing can be wonderful."
Mae West, discoverer of personal magnetism
Message 3
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| Subject: | Dual Fuel Pumps and EFI |
--> AeroElectric-List message posted by: "John Burnaby" <jonlaury@impulse.net>
I want to wire 2 fuel pumps, for an EFI system, into AEC schematic Z-14 so that
when fuel pressure drops below a preset psi, the secondary pump turns on and
locks on ,and I want to have manual overides.
I was told pressure switches are not that accurate re repeatability and that I
would be better off with a pressure transducer. I'm not sure what a transducer
is and how it would be integrated into a switch that would control the pumps,
but I'm guessing that the pressure sensing device (transducer?) would be wired
into some sort of locking relay.
I welcome any ideas.
Thanks,
John
Message 4
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| Subject: | Dual Fuel Pumps and EFI |
--> AeroElectric-List message posted by: "John Burnaby" <jonlaury@impulse.net>
I want to wire 2 fuel pumps, for an EFI system, into AEC schematic Z-14 so that
when fuel pressure drops below a preset psi, the secondary pump turns on and
locks on ,and I want to have manual overides.
I was told pressure switches are not that accurate re repeatability and that I
would be better off with a pressure transducer. I'm not sure what a transducer
is and how it would be integrated into a switch that would control the pumps,
but I'm guessing that the pressure sensing device (transducer?) would be wired
into some sort of locking relay.
I welcome any ideas.
Thanks,
John
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