Engineering Questions, Problems & Solutions : TransWikia.com ~ Page 64

Estimating fan CFM from RPM, HP, and diameter

I am trying to determine the approximate CFM of several axial flow fans being used in agricultural storage in the developing world. The only information the storers have is the...

Asked on 01/24/2021

1 answer

what's wrong with this robust control scheme?

I'm learning how to control a double integrator with $H_infty$. my model is simply $$begin{gather}dot{r} = vdot{v} = F/mr(t_0) = 0text{ m}, $v(t_0) = 0text{ m/s},...

Asked on 01/23/2021 by venom

1 answer

Pushing fluid through microfluidics

my team is working on a project where fluid (mostly water) need to be pushed through small channels (like small pipes) in order to reach larger reservoir. We were considering...

Asked on 01/23/2021 by Peter Connors

2 answer

Identify bearing dimensions from its bearing number

In motors/pumps generally following bearings are used (ref: https://www.nke.at/en/bearings-applications/applications/electrical-motors):Deep groove ball bearingsCylindrical roller bearingsAngular contact ball bearingsAll these bearings are designated with bearing number for example: Deep...

Asked on 01/23/2021 by Ranjan Pal

1 answer

Schematic of a resettable thermostat

You can put 2 or 4 or even 6 pcs of this in series to make sure at least one will work or open if it reaches say 55 degree...

Asked on 01/23/2021

1 answer

When designing scissors, how do you design the blade geometry to ensure good cutting capabilities?

I have been looking online and found there should be two points of contact, one in the blades and one in the pin. In order to achieve this, I assume...

Asked on 01/23/2021 by Abel Velasco Vilanova

1 answer

Why does use with air or water reduce the maximum temperature of certain high temperature / pressure hoses?

This example is a Parker Hannifin model 426/436 "SAE 100 R1 AT / SAE 100 R16 High Temperature Hose". Here are the temperature specifications: ...

Asked on 01/22/2021

0 answer

Is it ok to use a "4-cycle only" fuel in a 2-cycle motor with mixed oil?

I have some Tru-Fuel, which is an ethanol-free gasoline. Ethanol free gasoline is needed in small engines because ethanol can degrade rubber gaskets and cause other problems like gumming up...

Asked on 01/22/2021 by Wallace Park

2 answer

Separate air from water for water pump in aquarium

I'm using the following setup to pump water out of a space below the gravel (yellow) in my aquarium: The...

Asked on 01/21/2021

3 answer

Maximum hole size in brickwork before a lintel is required

Holes are made in brickwork walls for all kinds of reasons including gas flues, to route cabling and to fit windows. At some point that hole gets large enough that...

Asked on 01/21/2021 by egg

2 answer

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