Recent content by RKD89

Hi JBA, Firstly I am sorry for never having replied to you. It has been a year and I have taken a completely different career path in FEA (Finite Element Analysis). GD&T is no longer important for my current job but would still like to know about it as a personal goal. Thank you for taking...

Thank you so much

Thank you so much for your detailed reply. Your reply is exactly what has been missing for my career. I forgot to mention that I have never worked under someone experienced. I feel I m working like a machine, not being able even to think properly but just churn out results. Wouldn't working...

Hi, I am designing a BLDC hub motor for an electric buggy/light vehicle. The wheels are sized as 13" (total outer diameter), 3" wide. A standard 8" wheel rim should fit in well, width of the rim would be 2.10". Are there any standards for rims dimensions: The contact area between rim and tire...

Hi, I am a mechanical engineer who has worked only in start-ups, for past 3 years. Main experience is Mechanical design CAD with bit of FEA. Problem is I want to move to a more traditional company. I had had an interview with one of the largest oil and gas company for role of design engineer in...

Oh, I never thought of that https://www.ccohs.ca/oshanswers/ergonomics/push1.html I just plucked some data from above link. As in max push force a person can apply is 225N/23kgf. If I consider a persons weight, that will be easily 80-100 kgs, plus 20% as you suggested. Thank you for the...

Hi, I am trying to design an electric scooter, in a lot of ways similar to link below: http://www.letskickscoot.com/home/articles/scooter_stance.cfmFor an all electric vehicle , I am guessing stance 1 would be similar to braking, and stance 2 would be for an accelerating vehicle's frame of...

Wow, that would be great. Thanks a lot

Thanks, I am also thinking of a similar version. Instead of raising the whole sub frame (say including cutting motor, blade, batteries and electronics), how about the sub frame would carry just the cutting motor, blade only. Rest would remain stationary on the main frame attached to wheels.

Hi, I am trying to build (or at least conceptually) design a diy autonomous lawnmower. I want to add an automated grass cutting height mechanism. I have never worked with lawnmowers but through basic googling know that most lawnmowers have simple mechanisms in wheels to change cutting height...

Hi As described in my previous post I am looking to make a foldable mechanism of an arm hinge. I have changed my design into the one shown in attached image. I plan to use spring split or coil pin to constrain radial movement in the hinge (yellow and red). Adding a bolt through the hinge...

@JBA Thanks for the reply It's for a foldable arm of a quadcopter. I found out rough costing for the above parts and it seems I can't really afford it. Hence I am changing my design

That's exactly what I was thinking. Now to just figure out how to add some spring action in it

Hi All. I am stuck in a problem. Please check the image attached. It's part of a foldable mechanism of a quad copter arm. The red part is fixed to the body, the grey part is fixed to arms. The transparent part is a threaded collar/sleeve. The yellow part is a stopper. The hinge is a connecting...

Maybe something from this might help http://www.engineeringforchange.org/