First Engine

Have never built an engine of any kind before but now think I would like to make a two stroke, used to fly RC planes a few years back so something along these lines would be good, having never done anything like this before I have no idea how to start, do I get a kit or do I get some drawings, machine skills are not to bad so something intermediate sound's good, any advice please chaps.

Al.

A recent successful published design which fits your requirements is the Alex Whittaker Firefly. He had little previous machining experience. The design is made from bar stock and a good few have been made. I do not think there is a casting kit available now for a similar engine. Bar stock is easier to set up, but as the design is angular, it will probably need a suitable milling machine. HE 3O (6082) Alloy is recommended. I would recommend HE15 for the con-rod as it has twice the tensile strength of HE30. I cannot remember if it has rings, but these are capable of being made and heat treated. I think the drawings are a free download from his website at www.alexwhittaker.com. Alex first published his plans and article in the RCM&E magazine of which he is a regular contributor.

Yes the firefly would be a good one to start with. No rings to make but you do need to lap the piston to the liner and also the crank to the bronze bearing. This will take you straight to the drawing page, starts part way down with WF46-0001 for the A4 drawings which are easy to print off.

Have a read of how I built mine here

There are some casting kits available but the firefly would be an easier build than say the Jones 605

J

Edited By JasonB on 22/04/2014 07:57:04