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jonboy
10-18-2013, 11:26 AM
I was so fazed by the size of the 'I like bikes' thread that I couldn't face reading 1000 posts.. maybe this was covered , but....

Just came across the StringBike...any one who doesn't know it just google /youtube it...

Neat, nifty, clever, or complicated, pointless, and expensive ....

The inventor's main claim seems to be to do away with the 'dirty' chain and sprocket system....so be it, but what about a belt and toothed pulley system like Sportsters have had for 25 years for example, and some other companies are dragging themselves into the 21st C by copying... but back to the bicycle.....

Am I missing something? or what could be simpler than the traditional set up....if the stringdriventhing is so good why isn't it on the Tour bikes...?

Look at it and count if you can the number of bearings required....

If you want a clean drive system don't oil the chain ....I have done thousands of kms on a bike where I assembled with new derailleur front changer and chain and seven gear cassette, with no lube outside of the bottom bracket and internal cassette bearings.

It follows the chain and chainrings will wear out sooner without oil, but hello, who is going to notice on an urban city average family mountain bike set-up, and no sticky dust and grit magnet on the drive train... and at ten beer tokens for a new chain ......

and the belt and pulley will work perfectly with a hub gear system...

So please explain the reason why this clever and competent engineer has spent so much time and energy on something that isn't necessary...

who's signature is keep it simple unless complicated looks really cool...? answers on a postcard please to.......

switters
10-18-2013, 11:34 AM
Gates belt drive is getting pretty popular, just waiting for the cost to come down.

I also totally disagree with the maintenance free part of the silly string drive, those strings are going to wear and several pullys will wear.

And then there is riding in mud and road grit. There is a reason chains have been around for over a hundred years now.

bogdog
10-18-2013, 11:59 AM
They have more than a few exposed moving parts that I think could cause problems just riding on a wet road surface which would bring a fair amount of grit into the drive train. I suppose the string wear could be addressed with something like an aramid fiber with a metal braided casing. Shaft drives which have also been around for over a hundred years might be a better choice.

seanz
10-18-2013, 03:10 PM
I Like Bikes was supposed to be fun........it wasn't meant to frighten anyone........how did it all go so wrong?

P.I. Stazzer-Newt
10-18-2013, 03:16 PM
....Shaft drives which have also been around for over a hundred years might be a better choice.

Thus?
http://3.bp.blogspot.com/-R1tZraVo-aE/UEkPAT0dY3I/AAAAAAAAD4g/3g8stMP58dA/s1600/sIMG_0516.jpg

seanz
10-18-2013, 03:23 PM
Thus?

I'm watching ewe.


In a more serious tone......I think bike manufacturers are stuck with chain drive for a while yet. Simple, proven, efficient. Any substitute will have to beat chain-drive by a mile and I'm not seeing anything that does that. I don't like the look of the string drive. Pulling sticks out of derailleurs is bad enough. ;) Belt drive and a nice 7 speed hub would be my preference for what I do now.

That, and the way bike manufacturing works doesn't help either. The innovation has to come from the component suppliers and they need serious motivation for that to happen.

P.I. Stazzer-Newt
10-18-2013, 03:28 PM
Those shafts are appearing on municipal bikes for hire - Google up "Borisbike" or Cardiff’s more modest OyBike.

bogdog
10-18-2013, 03:49 PM
Shaft drive is a durable concept for bikes. Here's one with technology that was already proven when this bike was built in 1899. http://coopertechnica.com/_image/1899-Columbia-Model-59-Shaft-Drive-Bicycle-1.jpg Next thing ya know somebody's going to come up with flexible shaft outboard drives from small watercraft.

switters
10-18-2013, 03:50 PM
Besides Pauls pron about all the bilge is good for is poking bears and some good bicycle reads. Oh, and the pub.

I'm in the process of building up a path racer from a bike built in holland in the late 50s. Sturmey Archer 3 speed hub from '59 is still good. But i'm looking for a 1-speed coaster brake for this one. I doubt it will have rim brakes when it is done.

http://i281.photobucket.com/albums/kk221/switters_bucket/IMG_20131010_123326_961_zps549afc1a.jpg (http://s281.photobucket.com/user/switters_bucket/media/IMG_20131010_123326_961_zps549afc1a.jpg.html)


I did some clean up on the chainstays last night in prep for welding. If it wasn't for that this would have been a quick parts replacement. Now I might as well repaint. take the tabs off and go light.

http://i281.photobucket.com/albums/kk221/switters_bucket/IMG_20131017_191247_302_zps05b41616.jpg (http://s281.photobucket.com/user/switters_bucket/media/IMG_20131017_191247_302_zps05b41616.jpg.html)

bogdog
10-18-2013, 03:58 PM
Besides Pauls pron about all the bilge is good for is poking bears and some good bicycle reads. Oh, and the pub.

I'm in the process of building up a path racer from a bike built in holland in the late 50s. Sturmey Archer 3 speed hub from '59 is still good. But i'm looking for a 1-speed coaster brake for this one. I doubt it will have rim brakes when it is done.

http://i281.photobucket.com/albums/kk221/switters_bucket/IMG_20131010_123326_961_zps549afc1a.jpg (http://s281.photobucket.com/user/switters_bucket/media/IMG_20131010_123326_961_zps549afc1a.jpg.html)


I did some clean up on the chainstays last night in prep for welding. If it wasn't for that this would have been a quick parts replacement. Now I might as well repaint. take the tabs off and go light.

http://i281.photobucket.com/albums/kk221/switters_bucket/IMG_20131017_191247_302_zps05b41616.jpg (http://s281.photobucket.com/user/switters_bucket/media/IMG_20131017_191247_302_zps05b41616.jpg.html)Is that an old ring lock on the seat stays?

switters
10-18-2013, 04:06 PM
It is an old ring lock, good eye, the name on it is "magnet". Not sure what to do with it but it still works and has a detachable tab that locks it, but it is also aluminum. A nice conversation piece but not much in the way of security.

PeterSibley
10-18-2013, 04:29 PM
Chain ? There lots of chain here. This is the model for my next build , all components collected and just waiting for theto do list to settle a little .

http://www.bobmccutcheon.com/HPV/azub4-spodni-rizeni-500.jpg

LeeG
10-18-2013, 08:14 PM
Switters, what's the wheelbase and chainstay length on that bike?

AnalogKid
10-19-2013, 01:23 AM
I was so fazed by the size of the 'I like bikes' thread that I couldn't face reading 1000 posts.. maybe this was covered , but...

...and the belt and pulley will work perfectly with a hub gear system...

You just needed to skip to the end, this is my new bike for the commute, belt drive and hub gears - low maintenance and earily quiet, I love it, especially now the doctor says I can ride it
again (long story hopefully to be posted soon once I know what's going on).

http://lh5.googleusercontent.com/-gMUIGLb1glg/Uj0hgRgH-OI/AAAAAAAAAeU/j0UTKWx2cho/w900-h537-no/Inc2.jpg

PeterSibley
10-19-2013, 01:56 AM
The reason for the recumbent is I can only sit on a bike seat for an hour . Beyond that I choose hot coals.

reddog
10-19-2013, 02:56 PM
Chain ? There lots of chain here. This is the model for my next build , all components collected and just waiting for theto do list to settle a little .

http://www.bobmccutcheon.com/HPV/azub4-spodni-rizeni-500.jpg

Peter, what are you using for tubing? Will you bend it yourself or farm that work out? Nice looking bent, similar to my V Rex with the 26"/20" wheel combo. The Rex has above seat steering though. Sweet!

Earl

bogdog
10-19-2013, 03:32 PM
One of my neighbors has a very nice recumbent multi-speed tricycle with a big ugly honking flag off the rear... Anybody remember this East German racing tricycle from the early eighties? http://4.bp.blogspot.com/-F9XDt63TX_Y/UdSPxBO5ZKI/AAAAAAAAWSs/t3ep8PGeYSo/s638/dougtricycle.png

PeterSibley
10-19-2013, 04:30 PM
Peter, what are you using for tubing? Will you bend it yourself or farm that work out? Nice looking bent, similar to my V Rex with the 26"/20" wheel combo. The Rex has above seat steering though. Sweet!

Earl

I'm going to use this method of tube bending .http://www.youtube.com/watch?v=cquCfvsvoq0 If you do it make sure there is a steam vent just in case there's any moisture in the sand. I'll use 2" exhaust tube for this first build, there is a small weight penalty for exhaust tube over Reynolds chromoly, a difference in thickness of 1mm versus 1.5mm. I'll have to bend it myself as none of the metal shops can do it neatly, the exhaust shop's machine does an ugly job.

I'm going to set up with underseat steering but with the option to change to above seat.

reddog
10-20-2013, 04:49 AM
I'm going to use this method of tube bending .http://www.youtube.com/watch?v=cquCfvsvoq0 If you do it make sure there is a steam vent just in case there's any moisture in the sand. I'll use 2" exhaust tube for this first build, there is a small weight penalty for exhaust tube over Reynolds chromoly, a difference in thickness of 1mm versus 1.5mm. I'll have to bend it myself as none of the metal shops can do it neatly, the exhaust shop's machine does an ugly job.

I'm going to set up with underseat steering but with the option to change to above seat.

Very cool Peter. Hope you do a photo record of the build. You can find just about anything on YouTube.

Earl

PeterSibley
10-20-2013, 05:17 AM
OK, I hadn't thought of recording it as recumbents don't seem very popular .... but I'm hoping to build a bike I can happily ride for hours on end and I can't do that on an upright bike.

I'll take photos .Y>

reddog
10-20-2013, 05:42 AM
OK, I hadn't thought of recording it as recumbents don't seem very popular .... but I'm hoping to build a bike I can happily ride for hours on end and I can't do that on an upright bike.

I'll take photos .Y>

Not too many bents in this neck of the woods either Peter. My V Rex and the trike always draw stares. Kids seem to love them though. Here's a link to a site of like minded people, in case you haven't already come across it: http://www.bentrideronline.com
They have a good forum.

Earl

PeterSibley
10-20-2013, 06:02 AM
They are a few trikes around here and I occasionally see a touring trike but our roads are narrow and windy and frankly there's not enough room for that third wheel ... so a bike it will be !

I've visited bentonline but will need to pay more attention as the build gets closer !

switters
10-22-2013, 09:50 AM
Switters, what's the wheelbase and chainstay length on that bike?

Just saw this, bike is in the shop getting headset bearings, if we can make the fork work, lots of damage. We tapped the threads and it looks like we can make it work but... I got the chain stays welded this weekend and the rest of the parts off. I'll get some measurements when I get the bike back this week. I've got a build thread on bike forums in C&V.