Recent content by danielp3

Summary: Cubic equation How to solve for t ?

Ok, thanks for the tip. ok, thanks! The factory is running, yet with a lot of depreciation and waste. I' m listening and asking what I find important, lots of time they don't have the answers. Of course, but they are hard to talk to. They don't like when someone new asking questions :\

For sure! thanks for motivating!

Thanks a lot! will do

So recently I got my first job as an mechanical engineer. YAY! The factory produces plastic products such as bottles/jar/etc with 2 main methods. blow molding for PP and HDPE & ISBM for PET. The whole area of plastic is completely new to me, my boss know that. I'm the only mechanical engineer...

The motor I intend to use should be quit small to fit under a chair. A motor with such power will be huge. Ok, but that's not the case in my analysis. I cannot assume that.

I can post it of course, but I thought that maybe my approach is wrong, then all calculations will go wrong. The result I got is really high, I mean like 100+ [Nm] torque needed to the front wheels What do you mean?

I've come up with this FBD. where: T1 - given moment to front wheel T2 - moment created after moving the whole weight of the chair to the center of the wheel beta - hit angle between the wheel and the carpet fs1 - friction with the carpet fs2 - friction with the floor Fc - Reaction force from...

Ascend in means of go upward. Of course there will probably be a change in friction coefficient, but for now let's just assume ascend is going to a higher point (carpets height). thanks!

Of course there will be some sort of acceleration. 'Very slowly' in means of a=0 just to ease the calculations. I've done some calculation my self and got some freaky results (really high moment required to ascend a carpet.

When a wheelchair is about to ascend a carpet or a small step, which forces acts on the wheel(s)? Say the wheelchair is about to ascend the carpet with both two front wheels, will it be easier to analyze both of the wheel at once or just one? which force will act then? Say the wheelchair have 4...

first off, thanks. link doesn't work, but search criteria is still there. I don't need pneumatic wheels or any specific wheels. for now I'm looking for rolling resistance calculations in driven wheels and caster wheels.

I am sure you are older than me with much more experience. still, I'm just starting to gain experience as an engineer. Yes, I usually get the result I seek on the internet. I am searching for "steering torque calculation" , "rolling resistance" , "rolling resistance in driven wheels" and...

I am a "bit" familiar with the internet, it's not the first time I look for data and technical data in particular. I spent lots of hours in search for relevant technical data and specifications and couldn't find any. "your generation"? how old do you think I am? all I ask is help from someone...

Currently I don't have a motor. I am supposed to choose a motor that will satisfy the required torque.