Today's Message Index:
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1. 06:32 AM - Re: Making fat wire fatter (Robert L. Nuckolls, III)
2. 07:11 AM - Re: E-bus diode (Robert L. Nuckolls, III)
3. 08:39 AM - Re: E-bus diode (Robert L. Nuckolls, III)
4. 10:29 AM - Re: E-bus diode (Thomas Blejwas)
Message 1
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| Subject: | Re: Making fat wire fatter |
At 06:04 PM 11/21/2013, you wrote:
>I need to terminate a piece of #2 or #4 (not sure which) welding
>cable with a #0 wire terminal. So I want to increase the diameter
>of the stranded copper a little bit so that it fits snugly within
>the #0 wire terminal.
>
>I'm thinking about inserting the copper from some #12 solid wire
>into the center of the #2 (or #4) to fatten it up and then crimping
>it... Or maybe using a #6 brass machine screw inserted the same way.
>
>Suggestions?
>
>-Jeff
http://tinyurl.com/ct36xen
Bob . . .
Message 2
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At 10:39 PM 12/30/2013, you wrote:
Of course a higher voltage drop leads to a higher heat generated
and, hence, for many of us, the attraction of the Schottky diodes.
Yes . . . but how much heat . . . and what's the difference
between the two technologies?
I've been searching for single diodes to use in a modified version
of Bob's new Z-07. I'll have 12-15 amps of current through one diode.
That's a really BIG e-bus load . . . what's your
anticipated alternator-out endurance for
the battery you plan to carry?
I'm wondering about a diode in the ITO-220 case, like
http://www.digikey.com/product-detail/en/VFT4045BP-M3%2F4W/VFT4045BP-M3%2F4W-ND/3102977
With a forward of current of around 0.5V, the power to be thermally
accommodated is less than 8W. and many heat sinks are available for
the TO-220 configuration. The connections on the TO-220 must be
soldered, but I'm less concerned about soldered connections after
reading Bob's recent article in Kitplane.
Heatsink? What's your airplane made of? If there's
a few square inches of aluminum handy . . . why
not simply sink it to the airplane?
Are there other reasons for rejecting a diode like this?
Suggest you sift the premises under which
your procurement study is being conducted.
This diode . . .
http://tinyurl.com/nx5st6p
will carry 15A handily simply bolted down
to local sheet metal . . . but it's my fondest
wish that it never sees even 1/2 that load.
Not because the diode is at risk for overheating
but because the battery is not being well
conserved for alternator-out operations.
Were it my airplane, a high-priority design
goal would be to carry enough battery loaded
so lightly by the e-bus that I could depart,
punch through a cloud layer, suffer a failed
alternator and still comfortably continue flight
to airport of intended destination. The
"e" in e-bus is for ENDURANCE.
Bob . . .
Message 3
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Opps. Stuck foot in mouth when I wrote:
Were it my airplane, a high-priority design goal would be to carry
enough battery loaded
so lightly by the e-bus that I could depart, punch through a cloud
layer, suffer a failed
alternator and still comfortably continue flight to airport of
intended destination. The
"e" in e-bus is for ENDURANCE.
You said Z-07 . . . electrically dependent
engine. Okay, nice fat endurance numbers are simply
not practical for battery-only ops.
Okay, your quest for the "golden diode" is still
no big deal. Suggest you consider the dual, TO-247
package devices, parallel the diodes for improved
thermal resistance and simply mount to the airframe
as suggested in the product literature I cited.
Bob . . .
Message 4
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Thanks Bob.- Just the kind of advice I was looking for.- -Glad I didn
't rush to respond to you earlier message.=0A=0ATom=0A=0A=0A=0A>___________
_____________________=0A> From: "Robert L. Nuckolls, III" <nuckolls.bob@aer
oelectric.com>=0A>To: aeroelectric-list@matronics.com =0A>Sent: Tuesday, De
cember 31, 2013 9:38 AM=0A>Subject: Re: AeroElectric-List: E-bus diode=0A>
<nuckolls.bob@aeroelectric.com>=0A>=0A>Opps. Stuck foot in mouth when I wr
ote:=0A>=0A>Were it my airplane, a high-priority design goal would be to ca
rry enough battery loaded=0A>so lightly by the e-bus that I could depart, p
unch through a cloud layer, suffer a failed=0A>alternator and still comfort
ably continue flight to airport of intended destination. The=0A>"e" in e-bu
s is for ENDURANCE.=0A>=0A>- You said Z-07 . . . electrically dependent
=0A>- engine.- Okay, nice fat endurance numbers are simply=0A>- not
practical for battery-only ops.=0A>=0A>- Okay, your quest for the "gold
en diode" is still=0A>- no big deal. Suggest you consider the dual, TO-2
47=0A>- package devices, parallel the diodes for improved=0A>- therma
l resistance and simply mount to the airframe=0A>- as suggested in the p
- - - - - - - - - - - - - - -Matt Dralle, List
=======0A>=0A>=0A>=0A>=0A>=0A>
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