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jrmichler's latest activity
J
jrmichler
replied to the thread
Automatic Window Opener - how does it work?
.
I wish that I had thought to take the ideal gas law into account when sizing the gas struts for this truck topper. The published force...
Yesterday, 8:20 AM
J
jrmichler
reacted to
sophiecentaur's post
in the thread
How to spec a motor for this floor testing system?
with
Like
.
You need to come to terms with this. Annoying, perhaps but . . . . .
Sunday, 1:07 PM
J
jrmichler
replied to the thread
How to spec a motor for this floor testing system?
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Then you NEED a copy of the current ASTM standard that was linked in Post #5. That ASTM standard specifies how to design the Robinson...
Saturday, 5:41 PM
J
jrmichler
replied to the thread
I
Estimate thickness of an object based on radiative heat flux decay curve
.
Is this homework? If so, we can move it to a homework forum. That covers the heat loss upward. The heat loss downward is a function...
Jun 5, 2024
J
jrmichler
replied to the thread
Construction
Building open boxes with wood
.
If a picture is worth 1000 words, two pictures should be even better. Photo below shows the crossmembers and triangular piece without...
Jun 4, 2024
J
jrmichler
replied to the thread
Construction
Building open boxes with wood
.
Each crossmember is rigidly attached to the triangular piece by 2 or even 4 screws. The leg is pulled into the square corner formed by...
Jun 4, 2024
J
jrmichler
replied to the thread
Construction
Building open boxes with wood
.
Here's an idea. Two screws from each cross piece into the triangle piece, plus one long deck screw through the triangle piece into the...
Jun 4, 2024
J
jrmichler
replied to the thread
Effective rocking bed for a child
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in order for us engineer types to start brainstorming useful solutions, it is necessary define "rocking" in terms that engineers...
May 28, 2024
J
jrmichler
reacted to
MysticDream's post
in the thread
Centrifugal Compressor: Absolute Velocity Calculation
with
Like
.
Will have another look at it.
May 26, 2024
J
jrmichler
replied to the thread
Centrifugal Compressor: Absolute Velocity Calculation
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Go back and read Post #2 VERY CAREFULLY. Especially the part about fan curves, including the link. Hint: You calculate the fan...
May 26, 2024
J
jrmichler
replied to the thread
Engineering and pressure related questions
.
The OP is unable to properly do a simple P/A calculation, and has not been able to properly describe the system. Therefore, they...
May 24, 2024
J
jrmichler
reacted to
Arjan82's post
in the thread
Great one-liners from PF members
with
Like
.
I think what he meant a word of caution: "please constrain your problem well enough or engineers will run with it in the direction they...
May 22, 2024
J
jrmichler
replied to the thread
Gravity Based Electricity Generator
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After 74 posts, about 20 of which discuss the physics of energy conversion, I will summarize the physics of energy conversion: First...
May 21, 2024
J
jrmichler
replied to the thread
A
Modeling the damping of a physical rigid pendulum
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The free body diagram has a vertical force ##Mg##, a force ##Ma## in the direction of motion, and a force perpendicular to the direction...
May 20, 2024
J
jrmichler
replied to the thread
Gravity Based Electricity Generator
.
Fortunately, somebody has done this: That is the power that these animals will deliver over a normal work day under ideal conditions...
May 20, 2024
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