Thanks Diane, this issue restores my faith in Model Engineer by actually including some Engineering (i.e. design relevant) articles. Looking forward to a boiler design article and (perhaps) other technical articles? I may never design a locomotive, ic engine or any other model engine, but as an engineer (sadly in the wrong discipline) it is great to see how they actually work under the skin. BTW don't diminish the 'how to' and construction articles – I have laid aside my soldering iron and started work on a (probably badly constructed!) Emma Victoria – learning an entirely new skill set.
Keep up the good work.
Dave