Unknown chair?

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Unknown chair?

Postby NackerNed » 07 Oct 2021, 17:42

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Can anyone identify the make and model of this chair please?
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Re: Unknown chair?

Postby Burgerman » 07 Oct 2021, 18:10

Its a Optimus more scooter than chair. Steers differently, very big, no true zero turn caability etc. But great outside if that rear steer thing doesent offend your mechanical sensibilities. https://www.meyra.com/wheelchairs/produ ... roduct-47/

Meyra make a bunch of different real powerchairs inc many rear drive ones. They also do the TA IQ ones. Which will probably annoy our rear drive wanting USA members!

https://www.meyra.com/fileadmin/user_up ... GB_web.pdf
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Re: Unknown chair?

Postby NackerNed » 07 Oct 2021, 19:17

Thanks for the info!
This I'll be purchasing as a pure outdoor chair. Too good a deal to miss so be an interesting experience :D
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Re: Unknown chair?

Postby NackerNed » 07 Oct 2021, 23:14

Are you sure this is a Meyra as I cannot find one single Meyra with the same rear castor setup. Nor can I see the same centre foot plate. ?
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Re: Unknown chair?

Postby Burgerman » 08 Oct 2021, 00:31

I think so. 80% ?? I used my best magnifying glass on those tiny pictures! Its old. That footplate is off some shopping chair. Rear looks odd though. Maybe a bitza?

Does it have servo steered rear castors? And single drive motor on front?
If so its a Optimus of some kind. If not then its not.
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Re: Unknown chair?

Postby rickystyx » 08 Oct 2021, 10:09

I'ts an Optimus Mk1 and has powered steering - no idea how the settings will compare to the MK2 as they changed a few things between models
ottobock b400 150Ah lifepo4
Swiss-trac manual chair add on with 30Ah Lifepo4 (want more 15Ah headway cells )
Meyra Optimus (PRIME)2 150Ah lifepo4 :0)
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Re: Unknown chair?

Postby NackerNed » 08 Oct 2021, 10:28

Ah right, and are these reliable chairs do you know?
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Re: Unknown chair?

Postby Burgerman » 08 Oct 2021, 10:40

No idea but very compicated and that one does not use even the modified r-net controller. So is a even bigger mystery! Personally I might avoid. If its cheap enough then use as is. Till it fails. Rear steering is a bit odd. Like driving your car in reverse with a joystick. It has around a 10 foot wall to wall turning circle and about 45 degrees lock. Should have good ange as no tank steer losses as its basically a car, s far as steering is concerned and huge battery.
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Re: Unknown chair?

Postby NackerNed » 08 Oct 2021, 12:44

Certainly sounds interesting and I'm basically being gifted the chair as totally stuck so can't complain. Not even seen it in the flesh, just those poor photos. I'll still be after a permanent day chair so always looking.
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Re: Unknown chair?

Postby NackerNed » 08 Oct 2021, 17:05

Question? Storm 3 with all the seat tilt, rise and recline or the above Meyra?
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Re: Unknown chair?

Postby foghornleghorn » 08 Oct 2021, 17:46

Optimus 1 had completely different rear body and bigger wheels with less tyre. Also the lights were bolted on rather than moulded in to the front of the body.

Those tiny pictures are an Optimus 2. joystick certainly looks like R-Net to me.

When you said too cheap to pass on i was expecting £500. At free you could try it for a month and easily sell it on if you don't find it suits you.

Between that and a Storm 3 there's no contest as a pure outdoor chair. Meyra all day long.
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Re: Unknown chair?

Postby Burgerman » 08 Oct 2021, 19:01

Looks like a bitsa to me.
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Re: Unknown chair?

Postby NackerNed » 08 Oct 2021, 22:29

The chair definitely seems to be an Optimus 2. However, I can not find another rear castor set up the same as this one. This seems really odd to me. czy
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Re: Unknown chair?

Postby Burgerman » 08 Oct 2021, 23:55

That, and the footplate is why:

Looks like a bitsa to me.
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Re: Unknown chair?

Postby NackerNed » 09 Oct 2021, 08:49

I don't know what a bitsa is but I'll be collecting this next week and will post some better pictures. I'm sure I will need a new set of batteries as its stood for a good while apparently. Any recommendations for a good set of batteries in this?
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Re: Unknown chair?

Postby woodygb » 09 Oct 2021, 08:54

bitsa = bits of this and that from various other types / models.
An expert is a person who has made all the mistakes that can be made in a very narrow field.
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Re: Unknown chair?

Postby NackerNed » 09 Oct 2021, 09:15

Ah, I thought as much. Love to see people's creations, especially when done well!
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Re: Unknown chair?

Postby foghornleghorn » 09 Oct 2021, 09:34

There was a special order option to have it without the servo operated steering but I have never seen one before.

Dunno why the footplate is adding to any confusion - it's the first thing that would happen to any chair I got with foldaways.
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Re: Unknown chair?

Postby NackerNed » 09 Oct 2021, 10:11

I think it's just the fact that not 1 image of these options are anywhere. I wonder how performance is affected.
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Re: Unknown chair?

Postby Burgerman » 09 Oct 2021, 10:37

Well the meyra optimus uses a single centre motor with a dif to drive the front wheels like any scooter. So that cannot steer it. The rear end uses two steerable wheels like any car or scooter does. Albeit at the wrong end that are controlled by the joystick and servo instead of by handlebars. So its a car/scooter driving in reverse and cannot manoevre in the same way a powerchair can. So only like a scooter going backwards.

If it has NO steerable wheels that allow around 45 degrees turn, it has casters instead. So now it MUST also use TWO drive motors in a tank steer mixed arangement to control steering in the same way as every powerchair. This is less battery efficient but (size allowing) means it is much better indoors. Just like any front drive powerchair. And so this means it does not use that special power module converted to a single channel unit. So it probably also had a gyro as its still an unstable setup being front drive with casters. So it will "fishtail" and be horrible outdoors at any speed. This means it will almast definitely be a lot slower than the normal optimus.

But I didnt know they made that. And if so its likely just a front drive meyra powerchair with the optimus body kit...
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Re: Unknown chair?

Postby LROBBINS » 09 Oct 2021, 11:44

I think one could also steer by driving a gear in the differential with a second motor.
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Re: Unknown chair?

Postby Burgerman » 09 Oct 2021, 11:53

The only chair that ever did that as far as I know was the omegatrack - long since gone. But thats possible. You end up with the same result as tank steered dual motor regardless in that it can zero turn etc. Either way the only way to know is to look. And at the price (free) its worth doing!
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Re: Unknown chair?

Postby NackerNed » 09 Oct 2021, 12:32

From what I can gather this has been a chair that previous owners just didn’t get along with due to the reasons explained previous. I’m sure it’s had no real outdoor testing so will be an experience in itself. I can only imagine the whole fishtailing theory will be the first obstacle as I’ve suffered this before on a TDX2 and it’s horrible hence was ditched. If this was a special order to be built this way, it’s certainly been an expensive mistake to make in my opinion. Time will only tell how I get on with it but all part of the fun :P
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Re: Unknown chair?

Postby Burgerman » 09 Oct 2021, 12:43

TDX2 does not really have the fishy thing. Its got abysmal delayed action turn acceleration and deceleration instead. It feels terrible like all stock chairs. So you cant hit a doorway. That like EVERY chair can be reprogrammed so that it steers properly and goes exactly where you tell it. It needs an OEM level tool and a little knowledge.

Also heres that footplate https://www.ebay.co.uk/itm/265003751047
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Re: Unknown chair?

Postby NackerNed » 11 Oct 2021, 12:02

IMG_5576.jpg
IMG_5577.jpg



My Optimus 2 is being delivered today but batteries are dead. I will replace with the highest capacity available for furthest range. Where and what is best to purchase as never bought this size before?
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Re: Unknown chair?

Postby Burgerman » 11 Oct 2021, 14:26

MK gel. And it will bankrupt you. Or go lithium, 200 Ah or more is easily possible as those batteres are bigger than a normal powerchair battery.

All of that is likely worth more than he chair.
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Re: Unknown chair?

Postby Burgerman » 11 Oct 2021, 14:27

MK gel. And it will bankrupt you. Or go lithium, 200 Ah or more is easily possible as those batteres are bigger than a normal powerchair battery.

All of that is likely worth more than he chair. Which is why it now has cheap chinesium junk batteries in it.
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Re: Unknown chair?

Postby LROBBINS » 11 Oct 2021, 14:32

If you have a pair of even barely usable batteries smaller than the ones that fit, you might want to attach them just to check whether the chair is functional before spending oodles to buy decent batteries. MK Gel in that size will be more expensive, wear out sooner and give less range, and weigh lots more than LiFePO4, but with Lithium you have to deal with the complexities of balance charging. If you are willing to study up first though LiFePO4 is well worth the trouble.
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Re: Unknown chair?

Postby NackerNed » 11 Oct 2021, 14:38

If the chair is worth it, I will pay.

https://www.mobilitypitstop.com/product ... r-battery/

Anybody tried these?
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Re: Unknown chair?

Postby NackerNed » 11 Oct 2021, 14:49

LROBBINS wrote:If you have a pair of even barely usable batteries smaller than the ones that fit, you might want to attach them just to check whether the chair is functional before spending oodles to buy decent batteries. MK Gel in that size will be more expensive, wear out sooner and give less range, and weigh lots more than LiFePO4, but with Lithium you have to deal with the complexities of balance charging. If you are willing to study up first though LiFePO4 is well worth the trouble.


I will test the chair with a relatively new set of 55ah gels before I part with any cash. I am willing to study up on lithiums but now is not the right time as I just need a reliable outdoor chair. This will basically be my car around town.
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