Today's Message Index:
----------------------
1. 09:48 AM - Re: New role for the E-Bus? (wsimpso1)
2. 12:51 PM - 3/4HP Belt Sander Motor (Rod Smith)
3. 05:09 PM - Re: 3/4HP Belt Sander Motor (Robert L. Nuckolls, III)
4. 06:00 PM - Re: 3/4HP Belt Sander Motor (Brian Phillips)
5. 08:27 PM - Re: 3/4HP Belt Sander Motor (Stuart Hutchison)
6. 09:30 PM - Re: Aircraft Tug ()
Message 1
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| Subject: | Re: New role for the E-Bus? |
I was on Avidyne's site and saw their 60 second shutdown at 9 volts too. I wonder
if they have an integral booster or some other solution.
I have inquiries to both Dynon and Avidyne on the topic of brownout reboot during
cranking. Yeah, I know, Dynon says use their backup battery. I also inquired
about having more than one set of power connections, perhaps diode isolated
inputs.
I wonder if we would be wise to isolate the brownout booster's output from ship's
power with diodes on both feeds to the buses or at each powered box.
Billski
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=495795#495795
Message 2
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| Subject: | 3/4HP Belt Sander Motor |
Not directly aircraft related but a tool that I use extensively in construc
tion of my Bearhawk for shaping metal parts. The motor is now spooling up v
ery slowly and when a load is placed on it, slows down considerably. As far
as I can tell, it is brushless, It's described as Type:=C2- TEFC Capacit
or-Start Induction and does have a large external capacitor. Any ideas on r
epairing instead of replacing this?
Message 3
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| Subject: | Re: 3/4HP Belt Sander Motor |
At 02:46 PM 4/13/2020, you wrote:
>Not directly aircraft related but a tool that I use extensively in
>construction of my Bearhawk for shaping metal parts. The motor is
>now spooling up very slowly and when a load is placed on it, slows
>down considerably. As far as I can tell, it is brushless, It's
>described as Type: TEFC Capacitor-Start Induction and does have a
>large external capacitor. Any ideas on repairing instead of replacing this?
Hmmm . . only one capacitor? If so, the capacitor
is significant only for starting. If it spools up
slowly -AND- lugs down under load, I'm thinking
the motor has hurt windings . . . not good if
this is the case.
There is a centrifugal switch that disconnects
the start winding and its companion capacitor
after the motor reaches some fraction of
nameplate rpm. If that switch is burned, then
it wouldn't start at all. The fact that
it is 'sluggish' at all times does not bode well.
Bob . . .
Message 4
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| Subject: | Re: 3/4HP Belt Sander Motor |
On 14/04/2020 10:05 am, Robert L. Nuckolls, III wrote:
> At 02:46 PM 4/13/2020, you wrote:
>> Not directly aircraft related but a tool that I use extensively in
>> construction of my Bearhawk for shaping metal parts. The motor is now
>> spooling up very slowly and when a load is placed on it, slows down
>> considerably. As far as I can tell, it is brushless, It's described
>> as Type: TEFC Capacitor-Start Induction and does have a large
>> external capacitor. Any ideas on repairing instead of replacing this?
>
>
> Hmmm . . only one capacitor? If so, the capacitor
> is significant only for starting. If it spools up
> slowly -AND- lugs down under load, I'm thinking
> the motor has hurt windings . . . not good if
> this is the case.
>
> There is a centrifugal switch that disconnects
> the start winding and its companion capacitor
> after the motor reaches some fraction of
> nameplate rpm. If that switch is burned, then
> it wouldn't start at all. The fact that
> it is 'sluggish' at all times does not bode well.
>
> Bob . . .
>
There is a small chance it is a capacitor run motor. A capacitor run
motor has no centrifugal switch, and the second winding stays in
circuit. If your capacitor starts to fail, its capacitance will drop,
reducing the phase angle between the two magnetic fluxes, reducing start
and run torque. If no centrifugal switch, check the capacitor for
correct capacitance, and replace if low, this may be an easy and cheap fix.
Brian Phillips.
Message 5
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| Subject: | Re: 3/4HP Belt Sander Motor |
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Message 6
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Just a quick question, why did you not keep the seat, would it not improve
traction if you had the extra weight?
Thanks
Mike
From: owner-aeroelectric-list-server@matronics.com <owner-aeroelectric-list
-server@matronics.com> On Behalf Of Joe Motis
Sent: April 12, 2020 12:56 PM
Subject: Re: AeroElectric-List: Aircraft Tug
Her you go Mike
I could not find another picture but I mounted a trailer hitch ball on to o
f the frame right behind the batteries and fabricated a tow bar with a hitc
h connector on it. Works excellent.
On Sat, Apr 11, 2020 at 12:42 PM <mike@vision499.com <mailto:mike@vision499
=2Ecom> > wrote:
Hello all
I=99m looking at building a 12v battery operated aircraft tug, not a
ride on just a walk with. My max aircraft weight will be about 1800 lbs.
I am looking for advise on what size motor I will need. There are a few 12v
motors for sale on ebay but they are not rated in hp so am not sure of wha
t specs I=99m looking at.
One thought was to use a car starter motor but that is not rated for contin
uous service but the farthest I will go with the tug is 100 yds and I
=99m not sure if it will cope with that distance. A friend has also suggest
ed converting an alternator into a motor, not sure what that entails. Ebay
has scooter motors with a speed controller that seems ideal but not sure i
f that will be powerful enough but it will be geared right down.
I look forward to hearing your thoughts and ideas
Thanks
Mike
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