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Folding Bikes Discuss the unique features and issues of folding bikes. Also a great place to learn what folding bike will work best for your needs.

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Old 02-13-18, 02:29 PM   #926
Revoltingest
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Originally Posted by Jipe View Post
Do we know how many bikes were pre-ordered ?
I have no clue. I wonder how many were like me, not wanting to be a Kickstarter backer, but willing to place an order directly with Helix when things looked more mature & successful. The price increase was minimal ($300). We could've easily added as much money as was raised on Kickstarter, & with no commission taken from it.
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Old 02-14-18, 12:42 AM   #927
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Originally Posted by Revoltingest View Post
I have no clue. I wonder how many were like me, not wanting to be a Kickstarter backer, but willing to place an order directly with Helix when things looked more mature & successful. The price increase was minimal ($300). We could've easily added as much money as was raised on Kickstarter, & with no commission taken from it.
Based on the timetable for production mooted at the time pre-orders were wrapped up, I seem to recall that pre-order bikes were to take about the same amount of time to complete shipping, once backer's were shipped, as the backer's bikes. From this, I assumed the volumes were similar.

Regardless, at this stage the Helix team must have a very good idea on cost to manufacture and they are still pressing on, which would be odd if they felt they didn't have a business case. Even at pre-order time, manufacturing costs would have been much clearer and pricing only stepped up $300.

Retail pricing has not been set and need bear no relation to the KS or pre-order pricing. It was always going to be more. How much more will, no doubt, reflect actual cost to manufacture, anticipated demand, Brompton and other competitor pricing and a premium for uniqueness and titaniumness.

Last edited by Gibsonsean; 02-14-18 at 12:48 AM.
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Old 02-14-18, 10:46 AM   #928
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Something I haven't figured out.
Look at the Helix in folded condition.

You'll see a straight line between the front fork pivot, the wheels axle centerline, & the swingarm pivot. This means that there's a lot of vertical compliance in the 2 connected wheels. If allowed to move upward from this position, the high leverage would impose potentially damaging loads on the pivots. That wouldn't be acceptable, so it must be a solved problem.
What keeps the wheels in place?
Does the swingarm touch the bottom bracket in this position?

Last edited by Revoltingest; 02-14-18 at 03:36 PM.
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Old 02-14-18, 04:09 PM   #929
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Originally Posted by Revoltingest View Post
If allowed to move upward from this position, the high leverage would impose potentially damaging loads on the pivots. ...
What keeps the wheels in place?
Took me a while to get your gist. It's an interesting question.

We do know that is a proprietary locking mechanism to lock the wheels together. This could potentially fix the angle between front monofork and rear swing arm. There may also/alternatively be robust limiters in the rear helical hinge. The front hinge looks like the weak spot in this scenario.
Then again, how much actual weight is going to be acting on the whole folded set up.
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Old 02-14-18, 05:09 PM   #930
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Originally Posted by Gibsonsean View Post
Took me a while to get your gist. It's an interesting question.

We do know that is a proprietary locking mechanism to lock the wheels together. This could potentially fix the angle between front monofork and rear swing arm. There may also/alternatively be robust limiters in the rear helical hinge. The front hinge looks like the weak spot in this scenario.
Then again, how much actual weight is going to be acting on the whole folded set up.
To handle the forces, a rotational locking device at the axles would be noticeably large & inefficient, & it would likely not be a passive device. The hinges are too small do handle rotational locking. Even the swing arm impinging against the bottom bracket would yield higher forces than I'd be comfortable with. I'd consider a stop on the frame extending down to touch the swingarm or axle/hub, thereby limiting motion passively & with low forces. I suspect they've figured out something more elegant.

Thinking more about it, a stop attached to the brake side dropout could work well. It could be short, light & unobtrusive.

Last edited by Revoltingest; 02-15-18 at 07:43 PM.
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Old 02-15-18, 12:08 AM   #931
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Originally Posted by Revoltingest View Post
To handle the forces, a rotational locking device at the axles would be noticeably large & inefficient, & it would likely not be a passive device. The hinges are too small do handle rotational locking. Even the swing arm impinging against the bottom bracket would yield higher forces than I'd be comfortable with. I'd consider a stop on the frame extending down to touch the swingarm or axle/hub, thereby limiting motion passively & with low forces. I suspect they've figured out something more elegant.
The wheel lock is not small. As the helical hinges result in horizontal translation, the limiter need not be rotational. From the picks I don't see any kind of impingement that would limit rotation with leverage. Be interesting to see when the bike arrives.
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Old 02-16-18, 02:48 PM   #932
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Looking forward to this weekends update!!

Happy Friday all
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Old 02-17-18, 02:56 AM   #933
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Originally Posted by Revoltingest View Post
Something I haven't figured out.
Look at the Helix in folded condition.

You'll see a straight line between the front fork pivot, the wheels axle centerline, & the swingarm pivot. This means that there's a lot of vertical compliance in the 2 connected wheels. If allowed to move upward from this position, the high leverage would impose potentially damaging loads on the pivots. That wouldn't be acceptable, so it must be a solved problem.
What keeps the wheels in place?
Does the swingarm touch the bottom bracket in this position?
Perhaps you can look up its patent. It might be possible to figure it out from there instead ?
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Old 02-17-18, 03:38 AM   #934
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Originally Posted by maxxevv View Post
Perhaps you can look up its patent. It might be possible to figure it out from there instead ?
I've looked over the US patent info, but don't see this issue addressed.
Ref....
COMPACTABLE BICYCLE
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Old 02-17-18, 11:10 AM   #935
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Latest Helix update has arrived!
Not divulging more than is appropriate.....
Testing is nearly done.
Production setup continues.
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