|
|
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
Trike suspension?, was I'm BACK!!!!!
On Sun, 17 Oct 2010 12:55:28 -0500, "gotbent"
wrote: "Harry Brogan" wrote in message .. . On Sat, 16 Oct 2010 16:53:14 -0500, Tom Sherman °_° wrote: On 10/15/2010 9:06 PM, gotbent aka FRT rider wrote: Actually, I am in the market for another ride. Can you give some brands that are currently offering the rear suspension???? Trice (Inspired Cycle Engineering (ICE) ) and HP Velotechnik both offer rear wheel suspended trikes and also fully $u$pended trikes. IIRC Challenge also makes a trike with rear suspension. There're probably one or two more if you search. I have not ridden a fully suspended trike, but rear suspension provides adequate comfort for almost all on-road conditions. I have to wonder how well rear suspension would hold up with a rack, saddlebags, and pulling a BoB trailer........Something to ponder..... Racks on my fully suspended semi-low racer and on the trice are mounted to the frame and do not interfere with the rear suspension movement and do not add to the unsprung weight. The manual for the semi-low (HPVelotechnik) two wheeler forbids the use a trailer. Don't have to worry about the two wheel issues. I am looking to get a new Tadpole. Just wondering what the issues might be. I have even seen one with front wheel drive and rear steering. Although I don't think I like that quite as well. |
Ads |
#12
|
|||
|
|||
Trike suspension?, was I'm BACK!!!!!
On 10/17/2010 6:33 PM, Harry Brogan wrote:
On Sun, 17 Oct 2010 12:55:28 -0500, wrote: "Harry wrote in message ... On Sat, 16 Oct 2010 16:53:14 -0500, Tom Sherman °_° wrote: On 10/15/2010 9:06 PM, gotbent aka FRT rider wrote: Actually, I am in the market for another ride. Can you give some brands that are currently offering the rear suspension???? Trice (Inspired Cycle Engineering (ICE) ) and HP Velotechnik both offer rear wheel suspended trikes and also fully $u$pended trikes. IIRC Challenge also makes a trike with rear suspension. There're probably one or two more if you search. I have not ridden a fully suspended trike, but rear suspension provides adequate comfort for almost all on-road conditions. I have to wonder how well rear suspension would hold up with a rack, saddlebags, and pulling a BoB trailer........Something to ponder..... Racks on my fully suspended semi-low racer and on the trice are mounted to the frame and do not interfere with the rear suspension movement and do not add to the unsprung weight. The manual for the semi-low (HPVelotechnik) two wheeler forbids the use a trailer. Don't have to worry about the two wheel issues. I am looking to get a new Tadpole. Just wondering what the issues might be. I have even seen one with front wheel drive and rear steering. Although I don't think I like that quite as well. Leave the rear-wheel steering to the forklifts and other low-speed vehicles, as it is almost impossible to make a rear-steer vehicle that handles well at speed. -- Tom Sherman - 42.435731,-83.985007 I am a vehicular cyclist. |
#13
|
|||
|
|||
Trike suspension?, was I'm BACK!!!!!
On Sun, 17 Oct 2010 18:43:30 -0500, Tom Sherman °_°
wrote: On 10/17/2010 6:33 PM, Harry Brogan wrote: On Sun, 17 Oct 2010 12:55:28 -0500, wrote: "Harry wrote in message ... On Sat, 16 Oct 2010 16:53:14 -0500, Tom Sherman °_° wrote: On 10/15/2010 9:06 PM, gotbent aka FRT rider wrote: Actually, I am in the market for another ride. Can you give some brands that are currently offering the rear suspension???? Trice (Inspired Cycle Engineering (ICE) ) and HP Velotechnik both offer rear wheel suspended trikes and also fully $u$pended trikes. IIRC Challenge also makes a trike with rear suspension. There're probably one or two more if you search. I have not ridden a fully suspended trike, but rear suspension provides adequate comfort for almost all on-road conditions. I have to wonder how well rear suspension would hold up with a rack, saddlebags, and pulling a BoB trailer........Something to ponder..... Racks on my fully suspended semi-low racer and on the trice are mounted to the frame and do not interfere with the rear suspension movement and do not add to the unsprung weight. The manual for the semi-low (HPVelotechnik) two wheeler forbids the use a trailer. Don't have to worry about the two wheel issues. I am looking to get a new Tadpole. Just wondering what the issues might be. I have even seen one with front wheel drive and rear steering. Although I don't think I like that quite as well. Leave the rear-wheel steering to the forklifts and other low-speed vehicles, as it is almost impossible to make a rear-steer vehicle that handles well at speed. Kind of thought that. Saw a video with one and, frankly, it looked a bit cheesy. |
#14
|
|||
|
|||
Trike suspension?, was I'm BACK!!!!!
On 30/09/11 03:02, Phil W Lee wrote:
Tom Sherman considered Sun, 17 Oct 2010 18:43:30 -0500 the perfect time to write: Leave the rear-wheel steering to the forklifts and other low-speed vehicles, as it is almost impossible to make a rear-steer vehicle that handles well at speed. I know this is a bit of thread necromancy, but really, weren't you aware that the fastest land vehicle ever built has rear wheel steering? http://www.thrustssc.com/thrustssc/E.../rearster.html It handled the transonic region pretty well, which is probably way faster than anything you were thinking of. I think if we substitute "difficult" for "almost impossible" we're at a fair place. I recall an answer Mike Burrows gave in print to a question asking why a rear wheel steer recumbent wasn't the obvious thing to do (combined with front wheel drive) in one of the rags (C+?). It suggested while it was possible such vehicles tended to be ridden by people with names like Koko who possessed particularly large shoes and red noses... I imagine MB was basing that on practical experience as well as theory as he's an excellent engineer quite unafraid of the unconventional. Pete. -- Peter Clinch Medical Physics IT Officer Tel 44 1382 660111 ext. 33637 Univ. of Dundee, Ninewells Hospital Fax 44 1382 640177 Dundee DD1 9SY Scotland UK net http://www.dundee.ac.uk/~pjclinch/ |
#15
|
|||
|
|||
Trike suspension?, was I'm BACK!!!!!
On Sep 30, 10:56*am, Phil W Lee wrote:
Peter Clinch considered Fri, 30 Sep 2011 11:42:23 +0100 the perfect time to write: On 30/09/11 03:02, Phil W Lee wrote: Tom Sherman *considered Sun, 17 Oct 2010 18:43:30 -0500 the perfect time to write: Leave the rear-wheel steering to the forklifts and other low-speed vehicles, as it is almost impossible to make a rear-steer vehicle that handles well at speed. I know this is a bit of thread necromancy, but really, weren't you aware that the fastest land vehicle ever built has rear wheel steering? http://www.thrustssc.com/thrustssc/E.../rearster.html It handled the transonic region pretty well, which is probably way faster than anything you were thinking of. I think if we substitute "difficult" for "almost impossible" we're at a fair place. I recall an answer Mike Burrows gave in print to a question asking why a rear wheel steer recumbent wasn't the obvious thing to do (combined with front wheel drive) in one of the rags (C+?). *It suggested while it was possible such vehicles tended to be ridden by people with names like Koko who possessed particularly large shoes and red noses... *I imagine MB was basing that on practical experience as well as theory as he's an excellent engineer quite unafraid of the unconventional. Pete. At the lower end of the speed range, I can think of a number of designs of tradesman's tricycle and rickshaw that are rear-wheel steered. The biggest problem seems to be overcoming prejudice. The mini that was converted to test the principle for ThrustSSC was thrown together quite quickly (as can be seen by just looking at it - it looks like the unfortunate result of a mini reversing hard into a couple of wheelbarrows full of scaffolding poles) but turned out to be as stable as (in some opinions, even more stable than) the standard mini. Quite a surprise, considering that it had the aerodynamics of a collapsed crane, a weight distribution that would have given Alec Issigonis nightmares, and a pair of rear wheels offset from each other so that the wheel plan was asymmetric. OK, the guys that knocked it together were real engineers, who knew what they were doing, but the result seems to indicate that it may actually be /easier/ to design a rear-wheel steering chassis that's stable at speed than a front-wheel steered one. The main rationale for front wheel steering seems to be that we've always done it that way, but there doesn't seem to be any good reason why we should still be constrained by the fact that early designs relied on a horse between the shafts to move the steering linkage! I used to "drive" a rear-wheel steered tadpole trike on a regular basis while I was learning to fly (J-3 Cub) and I can tell you the dynamics of the subject have been studied exhaustively. The problem is handling at the limits, the front wheels have to break loose before the rear wheel or the vehicle will spin out violently. Part of the problem with aircraft in this configuration was the large size differential between the main gear (front tires) and the tail gear (rear tire) but the biggest problem was that to minimize this effect you needed a really long wheelbase with almost all the weight on the front tires. One of the advantages was that a quick and dirty way to reduce this effect was to make the front track narrower so that the inside wheel would lift in a turn, causing the front to lose traction before the rear. For a streamlined trike with a rider that has broad shoulders but narrow hips (cough coughmecough)you could put the rider between the wheels without compromising the aero shape for the wheels since you would just need to make that part of the shell wide enough to fit the wheels and the drive between the shell and the rider's hips. With my hip-shoulder difference I could easily stuff everything next to my hips and still have to make the shell expand to fit around my shoulders. Admittedly I'm an extreme example (13.5" hips, 24" shoulders) but the principle would apply to people of more normal proportions also. |
#16
|
|||
|
|||
Trike suspension?, was I'm BACK!!!!!
On 9/29/2011 9:02 PM, Phil W Lee wrote:
Tom Sherman considered Sun, 17 Oct 2010 18:43:30 -0500 the perfect time to write: On 10/17/2010 6:33 PM, Harry Brogan wrote: On Sun, 17 Oct 2010 12:55:28 -0500, wrote: "Harry wrote in message ... On Sat, 16 Oct 2010 16:53:14 -0500, Tom Sherman °_° wrote: On 10/15/2010 9:06 PM, gotbent aka FRT rider wrote: Actually, I am in the market for another ride. Can you give some brands that are currently offering the rear suspension???? Trice (Inspired Cycle Engineering (ICE) ) and HP Velotechnik both offer rear wheel suspended trikes and also fully $u$pended trikes. IIRC Challenge also makes a trike with rear suspension. There're probably one or two more if you search. I have not ridden a fully suspended trike, but rear suspension provides adequate comfort for almost all on-road conditions. I have to wonder how well rear suspension would hold up with a rack, saddlebags, and pulling a BoB trailer........Something to ponder..... Racks on my fully suspended semi-low racer and on the trice are mounted to the frame and do not interfere with the rear suspension movement and do not add to the unsprung weight. The manual for the semi-low (HPVelotechnik) two wheeler forbids the use a trailer. Don't have to worry about the two wheel issues. I am looking to get a new Tadpole. Just wondering what the issues might be. I have even seen one with front wheel drive and rear steering. Although I don't think I like that quite as well. Leave the rear-wheel steering to the forklifts and other low-speed vehicles, as it is almost impossible to make a rear-steer vehicle that handles well at speed. I know this is a bit of thread necromancy, but really, weren't you aware that the fastest land vehicle ever built has rear wheel steering? http://www.thrustssc.com/thrustssc/E.../rearster.html It handled the transonic region pretty well, which is probably way faster than anything you were thinking of. Ask "taildragger" [1] pilots about the dreaded "ground loop", which is an involuntary quick turn that can cause a wingtip to drag the ground and/or collapse the landing gear. The ThrustSSC has a very long wheelbase and very little steering lock compare to say a Thebis trike, which I have seen flipped at low speeds: http://www.jggrafx.com/thomsstuff/thebis-full-rt.jpg [1] E.g. http://www.air-and-space.com/2005051...axiing%20l.jpg -- Tºm Shermªn - 42.435731°N, 83.985007°W I am a vehicular cyclist. |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
coming back from downtime - sore left back side - cause? | Paul | General | 1 | May 18th 07 06:45 PM |
back again | ray | Australia | 1 | January 18th 06 09:33 PM |
Little Boy Marty Wallace worte: Meter Maid Cop she is the Barney Five of the dept. Sergeant Tiffany Delatorre Email [email protected] conext tiem The report I got back little marty boy did not get ancord police report back THE cop THAT W | Valley Biker | Australia | 0 | September 24th 05 12:23 AM |
Back to Back Epic Uni Rides | aspenmike | Unicycling | 11 | August 17th 05 05:23 AM |
I'm Back!(Again...) | Catboy | Unicycling | 2 | June 16th 04 07:05 AM |