Recent content by cox24711

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  1. cox24711

    A Blast from the Past

    here is a link to a Cad model of a Webster if you wanted to download it https://grabcad.com/library/webster-engine-2
  2. cox24711

    Soft copper tubing?

    I have heard that you can harden copper tubing by sandblasting it or brushing it with a wire wheel if you are concerned with pressure.
  3. cox24711

    British Seagull 4 Stroke Idea

    Thank you very much! correct me if I am wrong, is that the engine that is used on the front cover of Malcolm Stride's book, Miniature Internal Combustion engines? (fantastic book by the way) would half inch lift sound about right in an engine ~110cc?
  4. cox24711

    British Seagull 4 Stroke Idea

    Also, does anyone know what shape/ profile of the cams would be the most suitable for a flat tappet high revving motor?
  5. cox24711

    British Seagull 4 Stroke Idea

    well hello again fellas, I have been busy with school as of late, with not much time for messing about. but I have been coming up with the camshaft timings. the bore 60mm stroke 40mm compression ratio 10:1, and I am aiming for peak power at 5500 rpm As always all suggestions/improvements are...
  6. cox24711

    British Seagull 4 Stroke Idea

    good news, the honda gx120 bore is 60mm! now I just need to buy a piston and ring set.
  7. cox24711

    British Seagull 4 Stroke Idea

    Thank you fellas for the suggestions Rod to put it simply I'm trying to make a 4 stroke engine out of a 2 stroke. I'm just messing around with ideas for now but thank you for your input XD351 Yes I have had I look at the briggs engines and sadly the smallest i can find is ~65mm and that is...
  8. cox24711

    British Seagull 4 Stroke Idea

    hello again fellas! After a lot of thinking I have decided to drop using original piston because i wasn't happy with the combustion chamber shape. Thus i have been back to the drawing board. the new piston is from the good old Victa lawnmower, at 62.7mm bore it was a easy swap, and by having a...
  9. cox24711

    British Seagull 4 Stroke Idea

    oh and I forgot to mention that the spark plug will be a 10mm, with 1" reach
  10. cox24711

    British Seagull 4 Stroke Idea

    Well, with another year done and dusted am back with the basic layout of the seagull 4 stroke. It is single overhead cam (thereby reducing the parts count, reducing the weight and most importantly keeping it simple) the arrangement it is done so by utilising 3.5 flat head briggs lawn...
  11. cox24711

    Happy New Year

    Happy new year! lets make this one the best one yet!
  12. cox24711

    Brass piston and cylinder problem

    I would try annealing the pistons.
  13. cox24711

    British Seagull 4 Stroke Idea

    hello john, thanks but I am already aware S.O.S I have personally bought parts from John (the owner) and I have spoken to him about my idea, and he likes the idea and is interested with where it goes. Greg
  14. cox24711

    British Seagull 4 Stroke Idea

    Thanks mate I was thinking of the same kind of idea using off the shelf bits and bobs. Ideally I would like to make this commercially. But first I need to design it and build a prototype and see where it goes from there. Greg. p.s that is a nice pic of an XD falcon you have got there. if I am...
  15. cox24711

    British Seagull 4 Stroke Idea

    Also I forgot to mention on the crankcase it will have one of these that will screw into the water jacket (with a 1 way check ball behind it) so you can connect your garden hose to it to make it easy and simple to flush out after use!
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