LockH
1 PW
^^ Hehe... But again, yer exchanging the size of the manufacturers gas tank for a tiny cup. :wink: ... and aero drag becomes FAR more relevant/important. :wink:
LockH said:^^ Hehe... But again, yer exchanging the size of the manufacturers gas tank for a tiny cup. :wink: ... and aero drag becomes FAR more relevant/important. :wink:
So are you claiming that tandems do not have this problem, and all the drag brakes installed on tandems are due to people's ignorance? I doubt that.Chalo said:Good thing that rims weigh several times as much as brake rotors, are made of a material with three times the specific heat capacity, and have a much larger surface area through which to discharge heat to the air.
I'm a skydiver, and one thing that I have learned during my skydiving career is that getting away with dangerous decisions does not make that decision safer. Using an unsafe main parachute 100 times in a row without problems does not reduce the risk on the 101st use, and making 100 toggle-whipped hook turns does not make the 101st safer. But it does make people THINK they are safer, which is one of the reasons there are so many landing injuries.Buk___ said:As the machine is already capable of, and has been regularly used at 55mph with its current gas motor; it will surely be okay to do that same speed once the ICE is replaced by a electric motor.
billvon said:So are you claiming that tandems do not have this problem, and all the drag brakes installed on tandems are due to people's ignorance? I doubt that.Chalo said:Good thing that rims weigh several times as much as brake rotors, are made of a material with three times the specific heat capacity, and have a much larger surface area through which to discharge heat to the air.
Some quotes from various bike forums, mostly bikeforums.net:Chalo said:I can say that I've never faced the problem you're hypothesizing about, even when I weighed 400 pounds, lived in a city with >20% grades, and routinely reached 55mph on my bicycle commute to work. Maybe it's because I wasn't fascinated with lightweight rims? I think it's because it's mostly an imaginary problem. My rims were never too hot to touch when I checked them.
billvon said:I'm a skydiver, and one thing that I have learned during my skydiving career is that getting away with dangerous decisions does not make that decision safer.
This obviously experienced rider of gas machines may have had a run of good experiences with unsafe machines, and thus trust them more than is warranted.Buk___ said:And what makes you think that this obviously experience rider and builder (of gas powered machines) would build and ride an unsafe machine?
billvon said:I assume you posted here because you wanted to talk about it, even when the opinions don't match yours.
Do you think it is possible that an experienced builder can build something that is not as safe as it should be?Buk___ said:I'm just niggled by people jumping on the "unsafe" theme erroneously started by someone who read the title & username, and nothing else; when the OP's information and pictures give strong indications that this is a experienced builder producing well-constructed machines; and an experienced rider of those machines.
billvon said:So you might be right and tandem manufacturers, tandem riders and everyone else might be wrong. It doesn't matter much to me, since our tandem now has disks.
??? They like rim brakes; so do I. Both my current electric bikes have rim brakes on the rear (just because it's easier to deal with a hub motor without having to deal with the disk too.) They're just sometimes insufficient at high weights/speeds, as in tandems and some ebikes; on such bikes disks (or in the olden timey days drum) brakes are often used. And as the article mentioned, those tandem bike specialists used disk brakes for that purpose as well.wturber said:Things don't seem so clear cut to these tandem bike specialists.
Buk___ said:He may be a "beginner" with e-bikes, but you don't construct the machine above without some knowledge and experience.
I for one would like to see what he could do with it.
wturber said:Billvon makes a good point about what appears to be safe vs. what is actually safe. Surviving so far is not proof of safe practice.
Buk___ said:I agree. But the OP has the experience of riding his 60mph gas-powered bicycle. How many other can say the same? Who's judgement is likely to be better, his experience or others assumptions?
markz said:Also look for 2T motors, dunno how common they are, or another option you could rewire the windings. I dunno much about 2T but they can be trouble or pesky to dial in, perhaps due to inductance or something else that is beyond me, so a controller able to handle 2T.
dogman dan said:Personally, to play with cars at 55, I'll take a gas motorcycle every time. I've nicked out of a bad spot plenty of times on that scoot, or other motorcyles, by having nearly instant double the speed I'm going there when I need it. My first instinct when cars f--k with me is gas, not brakes. Avoid and leave that texting driver behind me, not brake and deal with him again in a mile.