Today's Message Index:
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1. 11:31 AM - Re: old B and C SD-8 Dynamo failure (Robert L. Nuckolls, III)
2. 03:37 PM - Re: old B and C SD-8 Dynamo failure (Robert L. Nuckolls, III)
3. 07:49 PM - Re: Off Topic: Amazon tip for the charitable among us (Rick Beebe)
Message 1
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Subject: | Re: old B and C SD-8 Dynamo failure |
Got Mark's SD-8 and original stock R/R running
on the bench. The R/R seems to be fine too. I
initially used a LiFePO4 battery (ETX36) in the
test setup and observed some unexpected behaviors.
Got a small lead-acid from the store a few minutes
ago and put it on a maintainer. Will resume the
experiment when the battery tops off . . .
Bob . . .
Message 2
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Subject: | Re: old B and C SD-8 Dynamo failure |
>Bob, if you wanted to look at this dynamo for some reason, I'll be happy
>to mail it to you. I suspect you've got much better things to do than
>'paleo-forensics' on this dated item.
I've finished some preliminary operations on the
as received SD8 and companion R/R. They seem to
function pretty much as designed.
2800 RPM produces 3+ amps at 14.4v
3300 RPM produces 4+ amps at 14.3v
3800 RPM produces 8+ amps at 14.1v
At the final load setting, current
in the SD8 windings was 10.5 A(rms)
I can return this hardware if you'd like to
have it around for spares. At the same time,
it would be interesting/useful to add it to
the constellation of test tools I'm
building around a 2HP drive-stand with
and AND20000 spline pad on it.
Emacs!
As an interesting aside, test data were taken
without a battery on line . . . this prevented
pollution of current values dialed into the dynamic
load bank. I was able to 'tickle' the dynamo-r/r
into operation with a momentary application of battery
power. On one fire-up/shut-down cycle, the capacitor
was still charged to about 3 volts and the system came
on-line with only a small fraction of start up
excitation offered by the ship's battery.
Bob . . .
Message 3
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Subject: | Re: Off Topic: Amazon tip for the charitable among |
us
If you go into "Accounts & Lists" and "Your Amazon Smile" you can choose
your charity. I typed "Aviation" into the search box and got 861
results. Amazon claims there are almost a million charities in the
system so if you can think of one, they're probably there.
--Rick
On 4/17/2017 12:02 AM, Richard Girard wrote:
> Even the Soaring Society of America is on their list of organizations.
>
> Rick Girard
>
> On Sun, Apr 16, 2017 at 3:40 PM, Charlie England <ceengland7@gmail.com
> <mailto:ceengland7@gmail.com>> wrote:
>
> <ceengland7@gmail.com <mailto:ceengland7@gmail.com>>
>
> The recent link to an Amazon-listed product made me thing about
> this; a heads-up if you have charitable tendencies. Amazon has a
> feature called 'smile' (just add 'smile.' between the slashes and
> the word 'amazon' in the url.) If you sign up for it, your prices
> stay the same, but Amazon will donate some small % of your purchase
> price to the charity of your choosing, from a pretty large list of
> charities & worthy causes.
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