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  1. creast

    1/4 scale Anzani Fan Engine

    Thanks Pat, It has not been an easy ride for sure having made 3 rear casings and two front so I have to be careful how I work on this and not scrap it! I have a small kiln with PID controller and did try to age/precipitation harden a part once before but am unsure if I did it correctly (pretty...
  2. creast

    1/4 scale Anzani Fan Engine

    Today I managed to squeeze a three hour session in the workshop and managed to bore out the cylinder mounts which was very tedious starting from 10mm dia to 28mm in 0.25mm cuts on the boring head. Mind-blowing tedium! Still, it has to be done 🥱 Oh, and I forgot to drill one of the tappet holes...
  3. creast

    1/4 scale Anzani Fan Engine

    Thanks Peter. I did my best to achieve that using a snug fitting dowel rod from the spindle nose. I don't have sophisticated measuring equipment to verify that but I am sure I will find out on assembly. Rich
  4. creast

    1/4 scale Anzani Fan Engine

    Hi Ollie, Thanks for the kind comments but I think it looks better in the photos than in the eye :) This is not quite a radial but a bit more than the V-twin Vega I made. I am still working up to doing a real radial. As to the case boring situation, I intend to first clamp the back casing in...
  5. creast

    1/4 scale Anzani Fan Engine

    Boring the rear casing whilst locating from the nose bore went without a glitch and the assembly was transferred to the mill to face off each of the cylinder mounts. Next stage is to bore these faces plus tapped holes to accept the cylinders . The central mount had a casting defect but luckily...
  6. creast

    1/4 scale Anzani Fan Engine

    Progress has not been great. So far I have cast three rear crankcase halves and all manner of niggles with all of them. I machined the casting with shrinkage and managed to get it to clean up. bored it out and then found discrepancies in the alignment of the ribs and cylinder mounts. If these...
  7. creast

    1/4 scale Anzani Fan Engine

    Next challenge was casting the rear case which was the afternoons task. The first attempt showed bad shrinkage at the cylinder mounts but may just be salvageable. I tried another, This time the shrinkage was resolved but there was significant sand pull out or ingress and again just may be...
  8. creast

    1/4 scale Anzani Fan Engine

    Today was started with my first problem. I clocked up the bore on the mill as datum for drilling the eight crankcase bolt holes and on checking the centre drill positions for each boss it was obvious that something wasn't quite right. Without a co-ordinate measuring machine it would be difficult...
  9. creast

    1/4 scale Anzani Fan Engine

    Peter, Most of my castings are from an alloy wheel rim as it is a castable alloy and cheap to obtain. Machining properties are pretty rubbish really as most castable alloys don't machine as nice as wrought alloys like 6061. The swarf is fine chips and I do find threads are way much weaker. It...
  10. creast

    1/4 scale Anzani Fan Engine

    The crankcase half was clamped on the mill bed and a pilot bore made through the nose of the casting and its face squared off. The case was then transferred to the lathe using a spigot mount to clamp the casting square to the bore and allow the rear recess to be gingerly bored out. Another...
  11. creast

    1/4 scale Anzani Fan Engine

    This engine has been discussed in several threads on this forum and after creating a 3D model from Ken Rector's plans I have bitten the bullet to try and make one myself. I will probably make some changes to suit my manufacturing capabilities as the project progresses and I suspect this will be...
  12. creast

    I am anew member and have been making engines for several years my last engine was a 1/3 scale LeRhone rotary

    Welcome to the group! What fantastic engines, I wish I was capable of achieving such high quality workmanship 👍
  13. creast

    Anzani Fan Type 1/4 scale model

    I would like to point out a few things regarding the 3D model. Firstly, the model is not complete as I did not add the contact breaker plate assembly and shaft to drive this has not been made to suit. The front crankcase has the Anzani letters embossed and Ken pointed out these should be...
  14. creast

    Anzani Fan Type 1/4 scale model

    I have been corresponding with Ken over the last month and he has been very helpful and informative about this engine which I have now modelled to the best of my ability and published on GrabCad. https://grabcad.com/library/anzani-3-cylinder-fan-engine-1-4-scale-1 rklopp did express an interest...
  15. creast

    when to drill holes in cylinder head for model airplane engines?

    I built the ML Midge and cut fins first. It does mean some light deburring but is ok if drill with light pressure and slow. Rich
  16. creast

    ’Rolssi’ a 1936 vintage 4-stroke engine of Finnish origin.

    Beautiful workmanship and such a great detailed video. Spot on! 😁
  17. creast

    What Fillament, wall thickness and Fill Percentage for Patterns

    For me, printing patterns wins hands down and only requires a little forward thinking on how they will be used. I've never had a problem damaging my patterns when removing from Petrobond as I don't have the luxury of resin bonded sand. It's a case of horses for courses I guess.
  18. creast

    Anzani Fan Type 1/4 scale model

    Ken, Thank you for taking the time to do this. I must say on reading your build log I am extremely impressed with your talent in the the machine shop and I am resisting asking too many questions to avoid swamping or misdirecting the thread as often happens on this forum. Cheers Rich
  19. creast

    Threading and the compound angle.

    I leave mine parallel too but only because my ML7 can't swing round that far. It does mean a heavier cut but I can live with that. Rich
  20. creast

    Anzani Fan Type 1/4 scale model

    Hi Jason. Thanks for pointing that out. If you were an engineering workshop you would expect to see each part fully dimensioned and not have to hunt around the drawings translating dimensions. I fully understand that as hobbyists we don't expect the drawings to include tolerances and we use our...
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