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In lugnet.cad.dat.parts, Paul Easter wrote:
> This part is on the Part Tracker;
>
> http://www.ldraw.org/cgi-bin/ptdetail.cgi?f=parts/32278.dat
>
> The 32278 I have has a thickness of .0309" which is approximately 19.77LDU. Why
> are several of these liftarms getting changed to 18LDU?
Yes that seems strange, as far as I can tell all these liftarms are the same
width as a 1xN brick, so should be modelled as 20LDU as the bricks are.
ROSCO
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In lugnet.cad.dat.parts, Paul Easter wrote:
> This part is on the Part Tracker;
>
> http://www.ldraw.org/cgi-bin/ptdetail.cgi?f=parts/32278.dat
>
> The 32278 I have has a thickness of .0309" which is approximately 19.77LDU. Why
> are several of these liftarms getting changed to 18LDU?
>
>
> Paul
I've measured these and several others have as well and we all got 18 LDU
-Orion
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In lugnet.cad.dat.parts, Orion Pobursky wrote:
> In lugnet.cad.dat.parts, Paul Easter wrote:
> > This part is on the Part Tracker;
> >
> > http://www.ldraw.org/cgi-bin/ptdetail.cgi?f=parts/32278.dat
> >
> > The 32278 I have has a thickness of .0309" which is approximately 19.77LDU. Why
> > are several of these liftarms getting changed to 18LDU?
> >
> >
> > Paul
>
> I've measured these and several others have as well and we all got 18 LDU
>
> -Orion
What are you using to measure with?
I use a dial caliper.
Paul
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Paul Easter wrote:
> In lugnet.cad.dat.parts, Orion Pobursky wrote:
> > In lugnet.cad.dat.parts, Paul Easter wrote:
> > > This part is on the Part Tracker;
> > >
> > > http://www.ldraw.org/cgi-bin/ptdetail.cgi?f=parts/32278.dat
> > >
> > > The 32278 I have has a thickness of .0309" which is approximately
> > > 19.77LDU. Why are several of these liftarms getting changed to
> > > 18LDU?
> > >
> > >
> > > Paul
> >
> > I've measured these and several others have as well and we all got
> > 18 LDU
> >
> > -Orion
>
> What are you using to measure with?
>
> I use a dial caliper.
>
> Paul
I confirm Pauls measurement. I compared it with a brick and it has
the same thickness. This is also needed to connect a pin with the holes.
CU Bernd
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In lugnet.cad.dat.parts, Paul Easter wrote:
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This part is on the Part Tracker;
http://www.ldraw.org/cgi-bin/ptdetail.cgi?f=parts/32278.dat
The 32278 I have has a thickness of .0309” which is approximately 19.77LDU.
Why • are several of these liftarms getting changed to 18LDU?
Paul
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Liftarms are narrower than bricks, you don’t even need a caliper to see it :
...and measured with a caliper :
- brick width: 7.8mm
- liftarm width: 7.4mm
- liftarm height: 7.8mm
As stud space = 8mm = 20ldu, we get liftarm width = 7.4/8*20 = 18.5ldu,
approximated to 18 ldu.
Of course, thick liftarm height remain 20 ldu.
Philo
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In lugnet.cad.dat.parts, Philippe Hurbain wrote:
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In lugnet.cad.dat.parts, Paul Easter wrote:
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This part is on the Part Tracker;
http://www.ldraw.org/cgi-bin/ptdetail.cgi?f=parts/32278.dat
The 32278 I have has a thickness of .0309” which is approximately 19.77LDU.
Why are several of these liftarms getting changed to 18LDU?
Paul
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Liftarms are narrower than bricks, you don’t even need a caliper to see it
:
...and measured with a caliper :
- brick width: 7.8mm
- liftarm width: 7.4mm
- liftarm height: 7.8mm
As stud space = 8mm = 20ldu, we get liftarm width = 7.4/8*20 = 18.5ldu,
approximated to 18 ldu.
Of course, thick liftarm height remain 20 ldu.
Philo
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Thank you for this illustration. I see your point.
These parts should have been originally modeled rotated 90 degrees around Z so
that the liftarm “thickness” would have been the same a brick “width”.
I think I can safely say that I have rearely ever used liftarms in the manner
you illustrated.
Paul
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Thank you for this illustration. I see your point.
These parts should have been originally modeled rotated 90 degrees around Z
so that the liftarm “thickness” would have been the same a brick “width”.
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Indeed but... too late now :-(
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I think I can safely say that I have rearely ever used liftarms in the manner
you illustrated.
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...but using plates on side of liftarms can be very helpful to stiffen chassis
built with them.
Philo
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