michaelplogue wrote:The solution I like the best is to have one hand lever control the steering, and the other to deal with the tilt - such as used on the Tripendo...
wanders wrote:There is a Yahoo discussion group dedicated to tilting vehicles that is 7 years old. I recommend joining and reading it.
I will say that I looked seriously at a tilting tadpole design a couple of years ago. There is at least one excellent design that is simple and has only one flaw that is relatively easily remedied. If you are interested, let me know and I'll post the patent PDF. There are some relatively amazing videos of this design in action, as well, on YouTube.
Henry Thomas's Jetrike is one of the few deltas I've seen that incorporates self-centering tilt, sans the mechanical tilt lock. There is a few limitations in his design however; The geometry is exacting and is ill-tolerant to CoG changes much higher than about 500mm (assuming a seat height of about 250mm (9.8")). This also applies to the CoG's longitudinal position (i.e. forward biased CoG seems to inhibit or reduce the self-centering effects). The excellent open source plans are quite detailed and freely available via download from his web site http://www.jetrike.com/plans.htmlJohn in CR wrote:I've been toying with the idea of a leaning delta for a while. I don't want it to flop over at a stop, and while some of the mechanisms I've seen for locking upright are simple, avoiding them all together would be nice.
The individual swing arms should be mechanically linked and properly synchronized. If self-centering (no tilt lock) is desired, then the refined geometry that Henry Thomas has carefully detailed in his plans should be follow to achieve it.John in CR wrote:I found a pair used full suspension bikes that I can pick up cheap, and my thought is to put a hub motor in the swingarm of each and mount the swingarms side by side as close together as possible sharing a common axle at the pivot point. Then leaning, at least up to 30-40Â° for turns would be accomplished via compression of the suspension on the inside of the turn and extension of the one on the outside.
All 3 of the deltas I listed above are ridden and feel like 2-wheelers.John in CR wrote:Thanks Papa,
Fleet Trikes is an info packed site I haven't visited before, and that Black Max is really cool and looks pretty simple with tons of info shared, but I think I want to go with a swing arm approach, because 1. I'm going with a 1200W hub motor in each rear wheel, so any kind of stub axle is out and 2. With swing arms that pivot up and down around a shared axle, simply holding the rear brakes will give me enough lean lock to balance at stop signs and such, though I do realize I'll also need some kind of mechanical lean lock. I want to keep it simple, since I may very well end up back at an enclosed 2 wheeler with retractable "landing gear" similar to what some velo's use.
Regarding the jetrike page, since the maker wants to go back to tadpole, there must be a flaw in the application. Also, it's too exacting and I want to ride higher, so self balancing is out. It may be something to try someday, but not as a first attempt. I want to lean and steer like a 2 wheeler anyway, and I worry about fighting against a self balancing effect.
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