April Anom Prop
Never had to do that kind of stuff. The old man was a car nut and wouldn’t think of having anything that wouldn’t burn rubber just by stomping on the loud pedal.
Tom Holmes, N8ZM
From: Andrew Anderson [mailto:n8ves@yahoo.com]
Sent: Friday, April 22, 2016 1:20 PM
To: Tom Holmes tholmes@woh.rr.com; 'Midwest VHF/UHF Society Mailing List' mvus-list@febo.com; wb4gcs@amsat.org; Midwest VHF/UHF Society Mailing List mvus-list@febo.com
Subject: Re: [mvus-list] April Anom Prop
Hmmmmm.... Something tells me that you actually did that. How long did your old man ground you for? I did a few neutral slams in my Dads 1972 New Yorker. He never found out about that...
73 de Sam N8VES
From: Tom Holmes via mvus-list <mvus-list@febo.com mailto:mvus-list@febo.com >
To: 'Midwest VHF/UHF Society Mailing List' <mvus-list@febo.com mailto:mvus-list@febo.com >; wb4gcs@amsat.org mailto:wb4gcs@amsat.org
Sent: Friday, April 22, 2016 12:17 PM
Subject: Re: [mvus-list] April Anom Prop
Now that I've had a chance to read it more closely, I'd really expect reversing the motor would simply break loose the drive wheels as they reversed direction and thus would leave serious skid marks and certainly bring you to a screeching halt.
Remember how you could burn rubber with a slightly under-torqued sedan by getting up some speed in reverse, the popping it into Drive with the throttle nearly floored?
And how your old man would be pissed when you had to tell him the tranny failed?
Tom Holmes, N8ZM
-----Original Message-----
From: mvus-list [mailto:mvus-list-bounces@febo.com mailto:mvus-list-bounces@febo.com ] On Behalf Of Tom Holmes via mvus-list
Sent: Friday, April 22, 2016 11:14 AM
To: wb4gcs@amsat.org mailto:wb4gcs@amsat.org ; 'Midwest VHF/UHF Society Mailing List' <mvus-list@febo.com mailto:mvus-list@febo.com >
Subject: Re: [mvus-list] April Anom Prop
HI Jim…
Missed that when I read through it quickly, but thanks for the catch. I’ll see to it that the editor is made aware of that issue. Having worked in a lab for large motor and generators many, many years ago, I am well aware that shafts really do not to be twisted like that.
Thanks!
Tom Holmes, N8ZM
From: Jim Sanford [mailto:wb4gcs@wb4gcs.org mailto:wb4gcs@wb4gcs.org ]
Sent: Thursday, April 21, 2016 7:31 PM
To: Tom Holmes <tholmes@woh.rr.com mailto:tholmes@woh.rr.com >; Midwest VHF/UHF Society Mailing List <mvus-list@febo.com mailto:mvus-list@febo.com >
Subject: Re: [mvus-list] April Anom Prop
Tom:
Great issue.
One comment:
The article about regenerative breaking is incorrect when it says the direction of motor rotation is reversed. It is not -- armature and field excitations are changed such that it ceases being a motor and becomes a generator.
Think about it, the torques involved in instantaneous reversal would be enormous, uncomfortable for vehicle occupants, and even more so for the shaft of the device, for it's very short life.
73,
Jim
wb4gcs@amsat.org mailto:wb4gcs@amsat.org <mailto:wb4gcs@amsat.org mailto:wb4gcs@amsat.org >
On 4/21/2016 10:48 AM, Tom Holmes via mvus-list wrote:
See you Friday night!
Tom Holmes, N8ZM
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On Friday, April 22, 2016 1:56 PM, Tom Holmes via mvus-list <mvus-list@febo.com> wrote:
Never had to do that kind of stuff. The old man was a car nut and wouldn’t think of having anything that wouldn’t burn rubber just by stomping on the loud pedal.
Tom Holmes, N8ZM
From: Andrew Anderson [mailto:n8ves@yahoo.com]
Sent: Friday, April 22, 2016 1:20 PM
To: Tom Holmes tholmes@woh.rr.com; 'Midwest VHF/UHF Society Mailing List' mvus-list@febo.com; wb4gcs@amsat.org; Midwest VHF/UHF Society Mailing List mvus-list@febo.com
Subject: Re: [mvus-list] April Anom Prop
Hmmmmm.... Something tells me that you actually did that. How long did your old man ground you for? I did a few neutral slams in my Dads 1972 New Yorker. He never found out about that...
73 de Sam N8VES
_____
From: Tom Holmes via mvus-list <mvus-list@febo.com mailto:mvus-list@febo.com >
To: 'Midwest VHF/UHF Society Mailing List' <mvus-list@febo.com mailto:mvus-list@febo.com >; wb4gcs@amsat.org mailto:wb4gcs@amsat.org
Sent: Friday, April 22, 2016 12:17 PM
Subject: Re: [mvus-list] April Anom Prop
Now that I've had a chance to read it more closely, I'd really expect reversing the motor would simply break loose the drive wheels as they reversed direction and thus would leave serious skid marks and certainly bring you to a screeching halt.
Remember how you could burn rubber with a slightly under-torqued sedan by getting up some speed in reverse, the popping it into Drive with the throttle nearly floored?
And how your old man would be pissed when you had to tell him the tranny failed?
Tom Holmes, N8ZM
-----Original Message-----
From: mvus-list [mailto:mvus-list-bounces@febo.com mailto:mvus-list-bounces@febo.com ] On Behalf Of Tom Holmes via mvus-list
Sent: Friday, April 22, 2016 11:14 AM
To: wb4gcs@amsat.org mailto:wb4gcs@amsat.org ; 'Midwest VHF/UHF Society Mailing List' <mvus-list@febo.com mailto:mvus-list@febo.com >
Subject: Re: [mvus-list] April Anom Prop
HI Jim…
Missed that when I read through it quickly, but thanks for the catch. I’ll see to it that the editor is made aware of that issue. Having worked in a lab for large motor and generators many, many years ago, I am well aware that shafts really do not to be twisted like that.
Thanks!
Tom Holmes, N8ZM
From: Jim Sanford [mailto:wb4gcs@wb4gcs.org mailto:wb4gcs@wb4gcs.org ]
Sent: Thursday, April 21, 2016 7:31 PM
To: Tom Holmes <tholmes@woh.rr.com mailto:tholmes@woh.rr.com >; Midwest VHF/UHF Society Mailing List <mvus-list@febo.com mailto:mvus-list@febo.com >
Subject: Re: [mvus-list] April Anom Prop
Tom:
Great issue.
One comment:
The article about regenerative breaking is incorrect when it says the direction of motor rotation is reversed. It is not -- armature and field excitations are changed such that it ceases being a motor and becomes a generator.
Think about it, the torques involved in instantaneous reversal would be enormous, uncomfortable for vehicle occupants, and even more so for the shaft of the device, for it's very short life.
73,
Jim
wb4gcs@amsat.org mailto:wb4gcs@amsat.org <mailto:wb4gcs@amsat.org mailto:wb4gcs@amsat.org >
On 4/21/2016 10:48 AM, Tom Holmes via mvus-list wrote:
See you Friday night!
Tom Holmes, N8ZM
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On Thu, Apr 21, 2016 at 7:30 PM, Jim Sanford via mvus-list <
mvus-list@febo.com> wrote:
Tom:
Great issue.
One comment:
The article about regenerative breaking is incorrect when it says the
direction of motor rotation is reversed. It is not -- armature and field
excitations are changed such that it ceases being a motor and becomes a
generator.
Think about it, the torques involved in instantaneous reversal would be
enormous, uncomfortable for vehicle occupants, and even more so for the
shaft of the device, for it's very short life.
73,
Jim
wb4gcs@amsat.org
So it's correct - the article was titled Regenerative BREAKING, not
braking. ;-)
Dave Lundy
<google.com/+DaveLundy>
<www.dma1.org/~lundyd>
<www.facebook.com/lundyd43>
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Spare me this chat. Take me off this email chain and please cease responding to all for your personal comments. Thanks.
Sent from my iPhone
On Apr 22, 2016, at 5:36 PM, Dave Lundy via mvus-list mvus-list@febo.com wrote:
On Thu, Apr 21, 2016 at 7:30 PM, Jim Sanford via mvus-list <
mvus-list@febo.com> wrote:
Tom:
Great issue.
One comment:
The article about regenerative breaking is incorrect when it says the
direction of motor rotation is reversed. It is not -- armature and field
excitations are changed such that it ceases being a motor and becomes a
generator.
Think about it, the torques involved in instantaneous reversal would be
enormous, uncomfortable for vehicle occupants, and even more so for the
shaft of the device, for it's very short life.
73,
Jim
wb4gcs@amsat.org
So it's correct - the article was titled Regenerative BREAKING, not
braking. ;-)
Dave Lundy
<google.com/+DaveLundy>
<www.dma1.org/~lundyd>
<www.facebook.com/lundyd43>
<www.flickr.com/photos/lundyd>
<www.youtube.com/DMADave>
<www.twitter.com/lundyd>
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