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Hi Chris good to see you got there in the end. I'm not wanting to push info before you need it but this is a precaution Be careful not to use too much solder if you are soldering the needle into the thimble - it can run through and into the threads :rolleyes:. I use to do it fully...

Hi Chris - just caught up with your difficulties - sorry to hear you're having problems. Firstly though I have no idea as to why the threaded portion should bend as you describe I can only hazard a guess that the stresses induced when cutting the thread may be releasing as you 'ream' the hole...

Hi Re my post above whilst I did succcessfully 'hone' these cylinder liners to size using a cylinder hone I did nearly spoil them by making the half a thou or so interference fit in their barrels shorter in length than the barrels themselves. When the plug gauge was tried after pressing them in...

Hi Guys Some of you may recall I posted some pics of my attempts to make 5cc versions of this well loved British model aircraft engine in my introductory post. When setting out I had harboured thoughts that it would be nice to eventually cover all versions plus one 'special' and here, quite...

Hi Phillip - don't know if you've seen this thread on the Super Tigre build -http://www.homemodelenginemachinist.com/f31/super-tigre-g32-1cc-diesel-5cc-version-17674/index16.html Lapping for very close fit is covered in detail. This may be of use to you but as you are lapping bronze you will...

Hi Chris, That's a surprise that's quite thick wire for such a small engine. Just something to bear in mind re piano wire - well over here that is -possibly not in Aus.? 'Piano' wire is usually in Standard Wire Guage and as such has 'odd' diameters relative to drill sizes 16SWG -.063", 18SWG...

They're looking really good Chris but my that matchbox shows just how miniscule they are. I'm not sure I'd be able to work so small -that must be very testing. Are you planning on fitting a nut to the venturi thread to stop the venturi rotating? Glad you got the conrod sorted - D-bits can get...

Hi Chris - don't know if you've caught up with the Eta build of late but I've just described making the prop drivers which may be of some help. As you've probably moved the topslide from doing the crankshaft I would turn a taper in some scrap first and blue it to your shaft adjusting the angle...

Hi Chris, Well at least you've solved the problem. I had the same issue when building the Nova engine and set it up as here to mill out the sides with a long series slot drill... When I modify a file I only do the very tip - no more than about 8mm long. I use a half round section and just...

Hi Chris, this is all part of it at times :rolleyes: You might be able to scrape enough clearance (you only need ''just enough') using a half round needle file just ground on the end to act as a scraper - just be careful not to get it too hot and take the temper out. I'd be reluctant to use...

Hi Chris, I have tried this taper method myself and have to say did not have much success. Like you I considered the taper too much. That said there are others who have had success with this method but I think the wall thickness has to be pretty thin before it flexes. It's surprising how much...

Nice work Chris - I'm looking forward to the big moment :) Ramon

Hi Chuck - just come into this thread - asleep as usual :rolleyes: Theres also the JB weld 'method' which I've used successfully before (I think Jason tried it on his Benson engine) - no heat, no distortion or annealing and very very strong. Totally oil proof and even if you did decide at a...

I don't think I would turn them on the taper Chris, as that would mean the little end is wearing in one spot. If you are going to turn them make them very slightly up on size overall then 'polish' across (240 grit emery cloth, 320 wet and dry or a fine grade stone) until the pin will slip with a...

Nice work Chris, wont be long now. Just a thought - don't know if you've made the wrist pins yet but fitting them with brass pads each end will help prevent the potential of scoring the liner if the pin floats. As they are quite small diameter that might not be quite viable so failing that a...

Absolutely superb all round - workmanship, images and text . Truly informative posting - brilliant I only have time for a quick look now having to go out but am looking forward to reading it in more depth later Thanks for taking the time Terry Thm:Thm:Thm:

Nice one Chris - best laid plans and all that eh? Looking forward to hearing more in due course. Ramon

Hi Brian, I don't know if you are aware of it but I described a method of producing the points on needle valves on the Super Tigre thread - post 144> http://www.homemodelenginemachinist.com/f31/super-tigre-g32-1cc-diesel-5cc-version-17674/index15.html I have made many needles using this...

Hi Chris, it's all gone a bit quiet ;) - I hope it's all going okay for you. Have you lapped your pistons in yet? My cases are finished, just taking a few days out before tackling the rest. Hope to hear from you soon Regards - Ramon