llery)
UL Certified PV Installer
My RE&EV Circuits: www.EVDL.org/lib/mh
REEVA Demo: <http://youtu.be/4kqWn2H-rA0> http://youtu.be/4kqWn2H-rA0
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>From: Bill Dube via EV
>They only make cheap bicycle frames out of mild steel. Same thing for
>motorcycles.
>Bill D.
What about conventional cars? :-)
Lee
--
Excellence does not require perfection. -- Henry James
--
Lee A. Hart http://www.sunrise-ev.com
__
Then why do they traditionally use chrome-moly for steel bicycle frames?
(These days they make them out of all sorts of exotic materials.)
Ordinary mild steel would be _much_ cheaper, but they use chrome-moly.
"Fatigue limit" is the reason. You first want to make the frame as
light as practic
>From: "Neal, Gary via EV"
> /wiki/Specific_strength table: Oak (wood) has a higher specific strength
> than aluminum 6061-T6 and Chromoly (4130)! Balsa (wood) has a higher
> specific strength than most metals and almost rivals carbon-epoxy composites.
> ... Maybe we need to go back to the futur
EVDL Administrator via EV wrote:
Seriously, what do FCEVs really offer that's better than what BEVs are
already giving us? What exactly justifies taking resources away from BEVs
and giving them to FCEVs?
Well said, David.
I think the answer is that FCEVs have a few advantages that suit them
Reminds me of the Gaea trilogy - John Varley.
Peri
-- Original Message --
From: "Bill Dube via EV"
To: ev@lists.evdl.org
Cc: "Bill Dube"
Sent: 03-Dec-19 12:31:38 PM
Subject: [EVDL] OT: Re: Chrome-moly vs. Steel
Wood is still used today for construction of small airplanes. Unfortunate
Aircraft frames are built for high strength to weight ratios, but
vehicle frames normally target the stiffness to weight ratio.
If any part of your frame is getting close to the yield point of
ordinary mild steel, then it is, almost by definition, flexing too
much for geed handling.
Lotus, among
Wood is still used today for construction of small airplanes.
Unfortunately, it must be cared for well, and inspected regularly for
rot and bugs.
I suspect that DNA manipulation by CRISPR may well bring back wood as a
competitive fabrication material. It may even become an ecologically
prefer
Interesting observation from the
https://en.wikipedia.org/wiki/Specific_strength table: Oak (wood) has a higher
specific strength than aluminum 6061-T6 and Chromoly (4130)! Balsa (wood) has
a higher specific strength than most metals and almost rivals carbon-epoxy
composites. Of course wood'
Chrome-moly steel is about double the specific strength (ratio of
ultimate strength divided by density) of mild steel. That's why they
often use chrome-moly in airplanes, and never use mild steel.
https://en.wikipedia.org/wiki/Specific_strength
As you can see from the chart, mild steel has a s
On Tue, 3 Dec 2019 at 03:27, Lawrence Rhodes via EV wrote:
> Using chromoly will reduce the weight.
Oh, is Chrome Molybdenum Steel somehow magically lighter than mild Steel?
--
Paul Compton
www.morini-mania.co.uk
www.paulcompton.co.uk (YouTube channel)
_
l connection to
> this video. It is simply in my opinion a very good video with plans
> available. Lawrence Rhodes
>
>
> https://www.youtube.com/watch?v=UD3KymY86z8
>
>
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I'm hesitant to say anything in this thread because many years ago the EVDL
voted to downplay hydrogen, despite the fact that it's mentioned in our
original charter.
Also, a lot of what I say won't register for the True Believers. They'll
dismiss it out of hand. Nobody can shake their conv
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