Mechanics

Railmotor virtually started

As a member of the Buxton Model Engineering Society, I have accompanied other members on visits to the Sheffield & District Society of Model and Experimental Engineers (SMEE) miniature railway at Abbeydale where we are invited annually for private “running” days.  It’s always fascinating to see the engines that others have built as well as ride on them and occasionally drive them.  A couple of years ago, I decided I should build my own scale locomotive… Continue reading

Quadcopter project resumed

Over a year ago I decided I wanted to build a small Quadcopter. I bought some Hexatronic 5 gram brushless DC motors (HXM1400-2000) and some 6A Turnigy speed controllers. I designed a lightweight aluminium frame on CAD and did some research on how to stabilise it and control the four motors.

I came across an open source flight controller project designed for Quadcopters called Simple Flight Controller (SFC) which is based on an MSP430 – specifically the RF2500 2.4GHz development modules. I modified the source to compile on MSPGCC and got it to say “hello world” to me but then had to shelve it due to pressing work projects. Continue reading

Aluminium Cylinder Puzzle

Recently, while I was searching for some info about hack saws on the internet, I stumbled across a website by a chap called Chris Raynerd.  I was interested in many of the posts on Chris’s website but my attention was initially grabbed by his Aluminium Cylinder Puzzle.  Apparently the puzzle was designed by William Strijbos.

Having seen the puzzle, I decided I would like to have a go at making one myself so I contacted Chris to ask for further details.   Fortunately Chris got back to me and kindly sent me a drawing.  Armed with this, the search for ball bearings started in earnest! – I found a worn ball race that I had not disposed of after replacing the drum bearings in our washing machine so the steel balls were rapidly liberated ready to start a new life. Continue reading