Engineering Stack Exchange
Engineering Stack Exchange

Questions tagged [mechanical]

215 questions
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3 answers

Mechanical advantage of the 3-ring release system

I'm quite curious about the 3-ring release system used in parachutes, as described in this Wikipedia article: https://en.wikipedia.org/wiki/3-ring_release_system I wonder why is this system so popular? I've been told it's nearly ubiquitous in the…
S. Rotos
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6
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1 answer

Identify this bomb disposal equipment

A recent news item featured this photo of a WW2 bomb being prepared for detonation. Can anyone identify the purpose of the large widget sitting on the bomb? it's got a lot of cooling fins on it, and there appears to be fan on the right hand side.…
ConanTheGerbil
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2
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2 answers

What would I search for to find a combination of a cap screw and a set screw?

I'd like a (hex) cap screw that at the non-head end has a (smaller) keyed opening, allowing tightening the screw from the inserted end (because the screw will be into a threaded hole with an open end, and I can access the other side more easily…
chrisb2244
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1
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Fusion 360 animation , contact sets

I was designing a whit-worth quick return mechanism, I have provided the contact sets but they fail when I try to animate. The contact set is defined for the crank and slotted link.
Tom Thomas
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1
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1 answer

Planetary gearing

It is said when a planet gear revolves around a fixed sun wheel, the number of revolution it makes might be more than what appears to be logical. For example, if the planet and sun are fitted with 20 and 40 teeth respectively, the planet will rotate…
samoyo
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0
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2 answers

Wind Turbines on Cars used for Aerodynamic Braking

After a lot of research, I have found that people have been continually claiming that Wind turbines on Cars would not help whatsoever due to the Law of conservation of Energy. While this statement is correct, I feel that it does not cover all…
Ruthvik Venkatesan
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0
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1 answer

Scissor mechanism won't budge with slotted pin

I am looking to better understand why this scissor mechanism so easily moves by directly pulling on the lift...yet, seems incredibly difficult/impossible to move via the attached point in the slot? Ideally I would be able to pull the bar in the slot…
afreeland
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Between the front wheel and the rear wheel, what is good for maintaining speed?

A car weighing 13,000 N is driving at a speed of 50 km/h, overcoming a resistance (Fd) of 450 as shown in the figure. If the coefficient of friction between a wheel and a road on a frozen road is 0.065, explain which of the front and rear wheels is…
hhhujj
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1 answer

Practical consideration of truss

During truss fabrication, the truss member are usually connected by welding does behave like fixed joints not pin joint so how will that behave like truss without pin connection?
MK khatri
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0
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1 answer

worm gear linear motion with release mechanism

I want to convert rotational motion to linear motion. Since available space is limitation in my project, I was planning to use screw jack mechanism as a lift. But screw hack has very low efficiency - about 15% to 20% only. The rest of energy is lost…
devalvyas
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Compressed Air Piping Network and Flow

In our Factory we have a Compressor which rates 660 CFM (Kirloskar Make), which is a VFD Compressor. And next to compressor, we have a Receiver tank. Next to Receiver Tank, we have a Dryer. The Consumption of the Total Plant is around 350-400 CFM.…
Jenifer
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1 answer

How would I most easily create a mechanical intervalometer for a digital camera?

i.e. a battery powered device which presses a digital cameras capture button at some constant interval of ~60 seconds. Would it be an easy project for someone with little experience with electronics? The camera will be in a water-tight housing (a…
BarnOwl
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1 answer

How to keep a stationary motorcycle handle in the forward direction

How to keep a stationary motorcycle handle in the forward direction if no force is applied to rotate it. I have seen such motorcycles in Arcade Game Parlours but I want to make such one for myself.
Manjinder
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Internal involute spline 1.375 - 21T

could anybody help me by providing an internal involute spline data sheet similar to the attached picture for an 1-3/8" splined shaft with 21 teeth, 16DP and 30 degree pressure angle. Thanks for your help.
Jakob Arent
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