Recent content by AZFIREBALL
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How to Determine Over-Amperage on Pulley Size Change?
Check the fan bearings and other possible 'drags' on the blower if the measured amps are too high for the motor being used. The chart indicates 3 hp is enough to meet the specs. you specify.- AZFIREBALL
- Post #8
- Forum: Mechanical Engineering
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How to Determine Over-Amperage on Pulley Size Change?
I agree the pulleys indicated in my answer are too small to transmit 3 hp reliably. They were simply an example of two pulleys in the right ratio (1.5:1) to meet the RPM requirements. For continuous or heavy usage, the pulleys need to be much larger and may even need to be running more than...- AZFIREBALL
- Post #4
- Forum: Mechanical Engineering
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How to Determine Over-Amperage on Pulley Size Change?
The ratio of RPM between the motor and fan needs to be 1.5. Therefore you need a 3 inch dia. pully on the motor and a 2 inch on the fan. 3/2=1.5. Check the amps pulled by the motor with this combination to see if you are over driving the motor.- AZFIREBALL
- Post #2
- Forum: Mechanical Engineering
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Pressure of water exiting a hole in PVC
Is this the situation?- AZFIREBALL
- Post #7
- Forum: Mechanical Engineering
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Why would disconnecting the positive cable first on car battery cause sparks?
Having an exposed positive terminal with the negative still attached is just asking for an event! Like throwing a bullet in a campfire. Most of us tend to lay tools all around the open hood area as we are working with a difficult replacement like a timing chain or water pump. Think what might...- AZFIREBALL
- Post #31
- Forum: Electrical Engineering
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Why would disconnecting the positive cable first on car battery cause sparks?
I think the problem with removing the positive terminal at the battery terminal first is as follows. While removing the positive terminal the metal wrench being used might come in contact with metal of the car. If the battery contained a charge, this might cause a lot of sparks as high current...- AZFIREBALL
- Post #9
- Forum: Electrical Engineering
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Calculating the force of an average car
All you need to know is the dynamic coefficient of friction between the tires and the surface it sits on and the weight of the car to get the maximum possible horizonal force the car can produce.- AZFIREBALL
- Post #15
- Forum: Mechanical Engineering
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Please help me calculate the wire temperature due to this current
Why don’t you use a small 12 volt smoke detector battery for a test? Just place the wire across the terminals and see how hot it gets. CAUTION! IT WILL BE VERY HOT! CAUTION! IT WILL BE VERY HOT! Add resistance in series with the wire to reduce the current/temperature. Adjust(add/remove) the...- AZFIREBALL
- Post #12
- Forum: Electrical Engineering
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Finding moments in pedal (beam w/ rightangles)
Is the support at B a spring? Does the force at E remain perpendicular to the structure as it rotates? E to F need not be considered if the downward force is concentrated at E.- AZFIREBALL
- Post #4
- Forum: Mechanical Engineering
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Why are my terminals not marked on my capacitor?
Sorry for the injudiciousness. Too much Christmas Eggnog!- AZFIREBALL
- Post #12
- Forum: Electrical Engineering
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Why are my terminals not marked on my capacitor?
The marking of capacitor terminals is an antiquated practice that is no longer necessary. Capacitor terminals at various times in the past were designated with terms such as: In and Out, Up and Down, Plus and Minus, + and -, Charge and Discharge, etc. These terms where ambiguous to the neophyte...- AZFIREBALL
- Post #3
- Forum: Electrical Engineering
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Spur Gear Ratio: Optimal Ratio Explained
About 6.5 to 1- AZFIREBALL
- Post #3
- Forum: Mechanical Engineering
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Help me understand how this breadboard works?
You stated: '1 a: I do understand I ve wathed some youtube classes about it ' Tell us how the breadboard is connected internally...as you currently understand it.- AZFIREBALL
- Post #7
- Forum: Electrical Engineering
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Help me understand how this breadboard works?
Can you please identify all the items in your attachment?- AZFIREBALL
- Post #2
- Forum: Electrical Engineering
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How to unscrew a screw that has no inner screw pattern?
Is it a carriage bolt?- AZFIREBALL
- Post #6
- Forum: Mechanical Engineering