ThanksI've moved it over for you so you can keep posting in this thread - that way you don't lose the narrative so far.
That's a good approach. Like it. Ill have a look around for a 2-part/sided counter weighted crankhaft design tonight (there must be something on model engine news).Hi,
Just to add my views why not use the Laser engine type valve gear mounted on the rear or the engine crankcase and driven from the crankpin they use straight cut gears that may be easier for you (see picture) alternatively I built an 60 size engine using commercially available skew gears the driver was steel and the driven brass this allowed me to dowel the cam lobes either side of the brass gear.
Regards,
Peter
Hi Andrew, do you know what the skew angle of the driving (crankshaft) and driven (camshaft) gear is on your setup please? I have heard any angle combination works provided that the sum is 90deg for perpendicular screw gears. I heard 60/30 ratio but I haven't found the formula to calculate the gear ratio yet therefore I don't know which one should be which. I have got my hands on some CAD plugins to generate the gears so may have a fiddle with a 3D-printed prototype.I got these from HK, NGH engine parts, a little machining and I have the cam and gear set.
Cheers
Andrew
Hi Andrew,That's a good approach. Like it. Ill have a look around for a 2-part/sided counter weighted crankhaft design tonight (there must be something on model engine news).
Thanks for posting
Peter,Hi Andrew,
I finally remembered where I got my gears from this site is worth a look http://www.hpcgears.com/
Regards,
Peter
Legend! thanks for measuring. So 30 on the crankshaft(driving) gear, 60 on the camshaft(driven) gear. Same PA/module. 90deg drive should work. I hope to get tinkering on a prototype gear this weekend.Patrick, The gears are a 60/30 ratio as good as I measured. Hope this helps.
Cheers
Andrew
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