Today's Message Index:
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1. 07:36 PM - Re: B&C alternator conversion in Canada (milescrane)
2. 08:35 PM - Re: propeller pull through procedure (milescrane)
3. 11:03 PM - Re: Re: B&C alternator conversion in Canada (Jan Mevis)
Message 1
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| Subject: | Re: B&C alternator conversion in Canada |
We installed a B&C alternator on our Yak 55 (the one marketed for the Sukhoi) and
did save about 25lb. This is the low output, permanent magnet type.
It came with a solid state regulator and overvoltage protection. The weight saving
came primarily from the removal of the generator, and also from the old carbon
pile regulator and relay box.
The positives so far are: improved power-to-weight ratio and aerobatic performance,
and a smoothly operating charging system that works well even at low engine
speeds.
As for the negatives, we found that it was difficult and confusing to sort out
the existing wiring in our -55, for which we could find no diagrams, although
everyone we talked to said it was 'easy'. We routed the wires as much as possible
with the existing bundles and removed wires which we identified as being
non-functional. We traced one fault after the install to an original wire to
a CB on the panel, that appeared intact but had failed internally- due to flexing,
we think.
The wiring turned out to be a greater challenge than it should have been. A few
maintenance professionals were scratching their heads along with us.
I would recommend conferring with Transport Canada M&M first. They will likely
require documentation of all phases of the installation including the suitability
of the physical mounting of the alternator and regulator, gauges and support
of the wiring, etc.
If we were not flying contest aerobatics, we would have left the generator in.
Now that the alternator is in, we are happy with how it is performing.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=419687#419687
Message 2
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| Subject: | Re: propeller pull through procedure |
Every piston travels fully with each rotation of the crank, as for a one cylinder
engine. Two rotations complete a 'cycle'. To be sure all of them have completed
every stage of the cycle, one additional turn would do it, but I agree
that more turns are a good idea.
Be careful if someone wants to help- they may not realize that this is not to be
confused with a day at the gym!
As others have indicated, damage is possible by hand.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=419692#419692
Message 3
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| Subject: | Re: B&C alternator conversion in Canada |
I had the permanent magnet 10 amp B&C some years ago.
One day, the overvoltage protection AND the regulator were severely
damaged, because too large a current was drawn.
I replaced it with the more robust 35 amp type.
The 35 amp type is just slightly heavier than the 10 amp, but has a much
better voltage regulating system.
Jan
On 03/03/14 04:36, "milescrane" <milescrane@gmail.com> wrote:
>
>We installed a B&C alternator on our Yak 55 (the one marketed for the
>Sukhoi) and did save about 25lb. This is the low output, permanent
>magnet type.
>It came with a solid state regulator and overvoltage protection. The
>weight saving came primarily from the removal of the generator, and also
>from the old carbon pile regulator and relay box.
>
>The positives so far are: improved power-to-weight ratio and aerobatic
>performance, and a smoothly operating charging system that works well
>even at low engine speeds.
> As for the negatives, we found that it was difficult and confusing to
>sort out the existing wiring in our -55, for which we could find no
>diagrams, although everyone we talked to said it was 'easy'. We routed
>the wires as much as possible with the existing bundles and removed wires
>which we identified as being non-functional. We traced one fault after
>the install to an original wire to a CB on the panel, that appeared
>intact but had failed internally- due to flexing, we think.
>The wiring turned out to be a greater challenge than it should have been.
>A few maintenance professionals were scratching their heads along with us.
>
>I would recommend conferring with Transport Canada M&M first. They will
>likely require documentation of all phases of the installation including
>the suitability of the physical mounting of the alternator and regulator,
>gauges and support of the wiring, etc.
>
>If we were not flying contest aerobatics, we would have left the
>generator in. Now that the alternator is in, we are happy with how it is
>performing.
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=419687#419687
>
>
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