turning the jug
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HeadSmess
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nah, wrong material. cast iron has lots of graphite in it, remains slightly porous. tis why its predominately used as cylinder material. internal combustion cylinders, that is.
youll find all your "alloy block" engines still have iron sleeves.
"stainless steel" is actually a very generalised term. so is cast iron, but hey... any ways, stainless, heat, and rubbing on metal tends to equal failure... remember the piston rings travel up and down the bore 200 times a SECOND at 6000rpm.
6000/60 =100 times two (up,down) is 200.
the small alloy cylinders are chrome plated mainly cus its just easier on mass production. saves a few operations. helps heat transfer too
an interesting approach is what theyre doing on the rotaries these days...
make the cylinder(trochoid...it is a rotor after all) from high silicon/carbon alloy. then heat treat it so that the silicon and carbon combine and precipitate on the surface as SILICON CARBIDE. wet and dry sandpaper, or, the hardest manmade material, 2nd to diamond.
great, a sandpaper surface on a cylinder? wtf?
they then get a diamond hone and grind the surface down to size, making it flat.
theres a slight (microscopic) gap between each silcarb crystal, that helps to retain oil.but due to the diamond grinding, the edges are very sharp. so they then hone out with standard stones, which rounds off the edges without affecting final dimension.
you now have a surface that cant be chipped off, unlike chrome. its the 2nd hardest material, so it wont wear. it holds oil, so it wont sieze, gall, etc...its always lubricated, and seals better...
heat treating aluminium...wow. did i say chrome plating it is hard? requires a furnace accurate do the degree that can hold temp for days sometimes... deep knowledge of exactly what alloy is being used (t6 6061, t2 7001, t5 3024, etc...thousands of types)
just like welding it
youll find all your "alloy block" engines still have iron sleeves.
"stainless steel" is actually a very generalised term. so is cast iron, but hey... any ways, stainless, heat, and rubbing on metal tends to equal failure... remember the piston rings travel up and down the bore 200 times a SECOND at 6000rpm.
6000/60 =100 times two (up,down) is 200.
the small alloy cylinders are chrome plated mainly cus its just easier on mass production. saves a few operations. helps heat transfer too
an interesting approach is what theyre doing on the rotaries these days...
make the cylinder(trochoid...it is a rotor after all) from high silicon/carbon alloy. then heat treat it so that the silicon and carbon combine and precipitate on the surface as SILICON CARBIDE. wet and dry sandpaper, or, the hardest manmade material, 2nd to diamond.
great, a sandpaper surface on a cylinder? wtf?
they then get a diamond hone and grind the surface down to size, making it flat.
theres a slight (microscopic) gap between each silcarb crystal, that helps to retain oil.but due to the diamond grinding, the edges are very sharp. so they then hone out with standard stones, which rounds off the edges without affecting final dimension.
you now have a surface that cant be chipped off, unlike chrome. its the 2nd hardest material, so it wont wear. it holds oil, so it wont sieze, gall, etc...its always lubricated, and seals better...
heat treating aluminium...wow. did i say chrome plating it is hard? requires a furnace accurate do the degree that can hold temp for days sometimes... deep knowledge of exactly what alloy is being used (t6 6061, t2 7001, t5 3024, etc...thousands of types)
just like welding it
big kountry 75
New Member
That style is like the old board track racers of days gone by for those guys doing a replica it would be cool
goodtime65
Member
http://www.youtube.com/watch?v=HphHsphVdQs Here is sort vid of my project you just have to work the ports in the casing abit
HeadSmess
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yep. KISS
read up on porting before he even makes a mold.
but you can poke the exhaust out anywhere, with a more standard(circular) flange like real bikes, have the carb somewhere else, incorporate enough space for reed valves, everything... even make a water cooled jug!
dont forget the head either.
wish you lived in sydney cus then id wanna meet this guy but then again i guess its just as well youre in SA... im annoying
read up on porting before he even makes a mold.
but you can poke the exhaust out anywhere, with a more standard(circular) flange like real bikes, have the carb somewhere else, incorporate enough space for reed valves, everything... even make a
water cooled jug!dont forget the head either.
wish you lived in sydney cus then id wanna meet this guy but then again i guess its just as well youre in SA...
im annoying 
ChoppaStile
New Member
It will work if you turn the cylinder around, even without the dremol.
KCvale
In memory of KCvale 1959 - 2019
Turn the piston around too, so the rings stays stay with the exhaust port.
KCvale
In memory of KCvale 1959 - 2019
Not well. The case to cylinder ports don't line up.
Turn the piston around too, so the ring stays remain orientated with the exhaust port.
ChoppaStile
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