| Gallery, Projects and General > How do I?? |
| Cylinder Bore 7/8" at a depth of 2.5" OR use DOM/CRS ? |
| << < (9/9) |
| NickG:
Chris, I remember the Webster being the first i.c. engine I could find plans for on the internet and it had a good build log with it. However, since then I've seen others that I'd like to have a go at. I really set my heart on a hit & miss but some of the linkages appear quite complex / fiddley and difficult to get to work authentically on very small engines so might give that a miss until later in life! I don't know whether you've seen it but I really like Arv's (putputman) Tiny i.c. over on HMEM. A good few people have built it with good results now and it won't cost much material wise. I think I'll give the Webster another look before I make my decision though as it seems pretty robust and uses stuff like car contact breakers which will help matters. How much was your spark plug if you don't mind me asking? Can you squeeze a normal 14mm car plug in there? I know it wouldn't really look quite right but the webster isn't really designed for aesthetics! Nick |
| raynerd:
Nick, I`ve seen the tiny Ic engine it just looks fiddly but actually my preference is Malcome Stride's - NE15s engine. I want to build that but I just thought it was a bit tricky for a first build. I`ve now got hold of the plans and have read through them and I`m still pleased I`ve gone for the Webster. I`ve only just got my head around how the engine works !! so it`ll be a nice simple first build. I`m not one for giving advice, I wouldn`t have a clue if you can fit a 14mm car plug - I`m just a lemming, I just follow what others have done! The plans called for a 1/4" x 32tpi plug which are expensive BUT then he changed it later on to a 10mm NGK CM-6 spark plug which most seem to use! It was cheap - £3.50 ish including the postage! http://cgi.ebay.co.uk/1x-5812-CM-6-CM6-NGK-SPARK-PLUG-/190459015786?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2c583df26a I don`t see why a 14mm car plug wouldn`t work but for the price, I`d just go with a CM6. Ignition is the only thing I`ve not got sorted. I`m also going to put some money into a RC carb as they seem to run much better on these. Webster looks a nice build but as John mentioned, I also considered and ask Jan Ridders for his plans for the simple IC engine. That looks nice as well but to be honest I have just seen more running Websters and so I presumed I`d get more advice if I got stuck. Chris |
| NickG:
The tiny i.c. looks fiddly but I don't think it actually is when you look at the way each component has been designed. I'll probably have to eat my words at some point for that :lol: Is that the nemmet overhead camshaft one from model engineer? I was buying Model Engineer at the time it was serialised and was very interested in it. It looked simple but not sure it was when I started looking at the components and methods involved! I prefer something that'll be a slow runner as well rather than something buzzing away. Ah right, that's much cheaper than I expected anyway for the 10mm plug! No point bothering with the 14mm one then! I was thinking of making a glow plug for even more simplicity, less stuff required and the plugs look quite realistic. I've seen people make successful spark plugs but I can't see me managing it - buying a proper plug would eliminate the source of another fault for me!! I also like the Ridders engines - the simple one seems to be the pressure controlled 2 stroke and his vapour carbs seem to work reliably. Hmm, so much to choose from these days! Nick |
| dbvandy:
Chris, I have just completed my webster build and I used 7/8 id x 1 od DOM for the sleeve and 1 id x 1.5 od 6061 aluminum for the cooling fins. I also used 6061 t6 for the piston with a 7/8 viton o-ring. It has about 10 hours on it and is going strong... I have even had it up to 4000 RPM for 10 minutes at a time, but it gets pretty hot. Here are some pics to help you out... Doug |
| Navigation |
| Message Index |
| Previous page |