Deleted
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Post by Deleted on Apr 22, 2016 21:30:53 GMT -5
Most of I think all the builds I've seen here with two seats are side by side. Wouldn't having a front and back seat allow for more stability? Just curious as to whether anyone has an opinion one way over the other.
Thanks,
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Post by 1983JZR3W on Apr 23, 2016 15:07:26 GMT -5
I am certainly not a handling expert and don't even play one on television. I have had my JZR reverse trike on the road about nine years and it handles fine to me with side by side seating. Just think a Morgan that is a bit smaller and lighter and you have a JZR. In my opinion, tandem seating looks more like a kit car or someone trying to duplicate fighter plane looks. Again, these are only my opinions and other people may or may not agree. Good luck with your project and keep us updated, thanks.
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Mick
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Post by Mick on May 11, 2016 17:17:22 GMT -5
I have never seen anything with tandem seating that looks great? Even the amazing Gordon Murray Rocket looks strange when a passenger is in it.
I was thinking with my RT to mount the motorcycle frame a couple of inches over to the passenger side, also fuel tank, battery etc just to try to even out the weight distribution but then would have to get custom made swing arm to offset the wheel so it is centralised.........you get the picture? If I had more money and time maybe.
Anyway in the UK we go around more right hand bends than left because of roundabouts so weight on the right is an advantage I suppose??
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dain
Junior Member
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Post by dain on May 13, 2016 14:44:36 GMT -5
I'm working on a design for a tandem currently... balance was not so much of an issue for me as much as getting my frontal area down to reduce current draw at speed (reducing aero drag) While obviously this design being open top isn't "aerodynamic" it only has to chug through half the air being half as wide. This is in attempt to create a production vehicle while keeping cost and tooling low. Less weight/losses due to friction require less power and battery = less cost. currently testing a pack made up of 18650 lithium cells in my 2 seat side x side and it works great!  |
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Post by noahkatz on May 13, 2016 16:26:04 GMT -5
... balance was not so much of an issue for me... Maybe it should be. The passenger will shift the CG rearward and with the relatively narrow track rollover is a possibility. |
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dain
Junior Member
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Post by dain on May 14, 2016 9:24:42 GMT -5
Yes rearward AND slightly upward if you want to be hyper critical... but im sure you already knew that just as uve assumed my track width is too narrow. I Certainly couldn't have already calculated a 100lb operator and 300lb passenger... a possible scenario. I just throw $h!t together and hope for the best!
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Post by Liteway on May 14, 2016 10:57:14 GMT -5
My big complaint with tandem seating is the awkward length that usually results. Should work better in your case with a compact electric motor. I guess you can achieve close to what ever balance you want by moving the batteries around.
You were kidding on that last line...Right?
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dain
Junior Member
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Post by dain on May 14, 2016 14:06:45 GMT -5
Yes - was kidding on the last line. While I'm not taking a full 6 sigma approach to my design, I'm still looking at the important items!
My battery which is comprised of 600 individual 18650 Panasonic cells sits directly under the driver. The compact nature of my drivetrain definitely contributes to keeping the length in check.. I've definitely noticed that some of the lengths get out of control.
I'm certainly open to any advice, but don't care for assumptions being made on what I have/have not taken into consideration. I only try to criticize when I feel that lives could genuinely be in danger... which I've seen more than once on this forum!
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Post by srx660 on May 15, 2016 3:45:11 GMT -5
One problem with tandem seating is that the passenger has the forward view of the drivers head. A second thought is the length necessary for the passenger to feel they are sitting comfortable. The ways around these problems could be a raised seat for the passenger's view, and for the comfortable seating a slightly wider body so the passenger could wrap their legs around the drivers seat slightly, moving the rear seat closer to the drivers seat. But then there's the ingress and egress problems there.
Years ago i wanted a Ed Roth type VW trike. After reading about, looking for them everywhere, and even finding built trikes i no longer liked them. They were really not a smaller, much lighter vehicle than a car at all. Put one next to a small car and you have a bodyless longer version of the car. Then i saw a morgan trike in person, and have never looked back.
My idea on the tamdem trike is to not be tandem. Build it as a single seater solves the length problem. A design with the elio type FWD drivetrain would make a very compact trike. That also opens the door for a wider but not longer side by side trike for people who don't like seeing the back of a head as the view. My wife prefers to sit next to me instead of in the back seat( the real reason for sbs trikes).
srx660
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Post by mtntech on May 15, 2016 9:39:52 GMT -5
With tandem seating the passenger literally takes a back seat to everything. The experience is compromised, vision is obstructed, and communication is difficult. A big reason to build a 2 seater is to be able to share the experience with someone else. Side by side seating is a much more preferable scenario. Tandem seating can provide for less frontal area if that's what you're shooting for, as is the case with the Elio.
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Post by DaveJ98092 on May 15, 2016 12:18:11 GMT -5
Really the only reason for me to build a Tandem is for a storage unit like a trunk behind me. I will never get my wife of 41 years to ride in a trike, NO WAY. So a side by side is about 75% worthless to me too. I have been wanting to build a tandem type due to making it with a wheelchair or "Hover-Round" lift for a physically challenged person to ride.
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Post by mtntech on May 15, 2016 14:14:15 GMT -5
Really the only reason for me to build a Tandem is for a storage unit like a trunk behind me. I will never get my wife of 41 years to ride in a trike, NO WAY. So a side by side is about 75% worthless to me too. I have been wanting to build a tandem type due to making it with a wheelchair or "Hover-Round" lift for a physically challenged person to ride. My wife seldom rides along but there have been many other riders. Neighbors, friends, family, co workers, and the list goes on....... |
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Post by DaveJ98092 on May 15, 2016 16:12:53 GMT -5
^^^^ Yeah, that would be the 25% for me going with a side by side.  When I do start a build it will be most likely be a tandem but with second thought on the rear seat. Maybe a clip in seat that will replace the cargo rack.
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dain
Junior Member
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Post by dain on May 15, 2016 19:22:34 GMT -5
I have a feeling 2nd seat in my design will be mostly used for hauling random stuff rather than people. I'm also of the opinion that it would be very similar to riding passenger on a motorcycle... not something I'd do but some people enjoy it I'm sure. A single seat would be fine too but there needs to be at least be a place to carry a backpack with a laptop (for going to work!)
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