Kranswurm Posted April 17, 2018 Posted April 17, 2018 (edited) What should have been a nice clear table came out as shite Edited April 17, 2018 by Kranswurm
Berg Man Posted April 17, 2018 Posted April 17, 2018 I know, but he said “melt”.Good point. Typing too quickly and not thinking things through correctly Patchelicious 1
Warthog Posted April 17, 2018 Posted April 17, 2018 And all this just because I'm getting a bamboo bike... Wannabe, DJR, duringd and 3 others 6
Hairy Posted April 17, 2018 Posted April 17, 2018 And all this just because I'm getting a bamboo bike... is there not a bunch of guys in Hermanus making bamboo bikes too?
Eldron Posted April 17, 2018 Posted April 17, 2018 The density of Finnish pine is 370 – 550 kg/m3, spruce 300 – 470 kg/m3 and birch 590 – 740 kg/m3. Those are pretty soft woods. Bear in mind wood's tensile strength increases as it's density increases. Wood is also 20 times stronger along the grain than across it, so that needs to be taken onto account too. The strongest wood I can find is Cedar Elm at 120mpa - well short of structural steel at 400mpa. All wood tensile tests are done parallel to grain. 4130 steel used in cheapy bike frames is around 951mpa after heat treatment. Berg Man 1
duringd Posted April 17, 2018 Posted April 17, 2018 And all this just because I'm getting a bamboo bike... Don't dare come to this forum with anything remotely interesting, we are all suckers for information. Been a rather interesting discussion!
Hairy Posted April 17, 2018 Posted April 17, 2018 to get us back on track geomark, Albatross and Sidersky 3
Eldron Posted April 17, 2018 Posted April 17, 2018 For the curious - here is a Wiki page on strengths. https://en.wikipedia.org/wiki/Ultimate_tensile_strength Bamboo is actually a pretty good material when you do the strength/density calculation! Berg Man 1
fanievb Posted April 17, 2018 Posted April 17, 2018 is there not a bunch of guys in Hermanus making bamboo bikes too? http://calculus-bikes.com/ BSG and Hairy 2
Eldron Posted April 17, 2018 Posted April 17, 2018 http://calculus-bikes.com/ Daaaaamn those bamboo and carbon bikes are truly droolworthy! This statement though: The ride characteristics of a bamboo frame are superior to aluminium or a full carbon frame due to its damping properties. The bamboo absorbs much more of the vibration from the road or mountain. I need more faces and palms so I can slap them together.
Readsalot Posted April 17, 2018 Posted April 17, 2018 But can you use bamboo to make this? Sent from my Nexus 5 using Tapatalk
Shebeen Posted April 17, 2018 Posted April 17, 2018 And all this just because I'm getting a bamboo bike... and it's not like it's a new topic https://community.bikehub.co.za/topic/131522-bamboo-single-speed-build/?hl=bamboo https://www.bikehub.co.za/features/_/gear/insight/building-a-bamboo-mountain-bike-r4566?source=topic
splat Posted April 17, 2018 Posted April 17, 2018 whoo boy. this guy looks quite special What a pansy!No swearing or throwing of racquets.McenRoe was the man! Fruity 1
splat Posted April 17, 2018 Posted April 17, 2018 It is known that structural steel begins to soften around 425°C and loses about half of its strength at 650°C. What speeds are you guys riding that you are worried about your bike melting!? Sidersky, Fruity, Berg Man and 2 others 5
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