David Hansen on Morph 2.5
Knee and foot support idea.
Arc of legs.
Carbon fiber footrest idea
Carbon fiber footrest idea
Extending the seat pan.
Before we go into detailed design for the actual Morph 4 prototype, I asked Alan to check the key dimensions of Morph 4 against those for Morph 2. Everything looks good in the drawing above.Trail in Low Rider: 2.5" (okay, a bit more trail than Morph 2's 1.3")
These are the measurements for Morph 2. Note that Morph 2 doesn't have the automatic seat adjustment system, and that it doesn't come down as far.All of these dimensions and angles look good. Nice drawings, Alan. Very clear and simple.
[From Alan Ball: January 12, 2010]
A while ago you requested some orthographic views with key dimensions called out for the M4. Check out the drawing I have attached here. Is this what you had in mind?
For comparison , I have included a drawing of the M2 geometry, which I documented in CAD and was measured and confirmed against M2. As you can see, the basic dimensions are almost the same, with differences occurring due to M4 greater range of morphing motion.
[From Alan Ball - January 12, 2010]
Attached to this email message is a pack 'n go of the solidworks model. Please note that I built this in SW 2009, so you may not be able to open it. With this in Mind I am sending you some edrawings, and also a step file and an IGES file( in the zip file). I hope this is sufficient for you to see what we have been up to.
On Chrismas Day, Alan Ball brought over a wonderful present - a working, 1/4 scale model of the Morph 4 prototype. Jake, our dog, is check Alan out. The wonder of this design is in how simple it looks, but how much it does. I believe we are now ready to design in metal, and build five or six prototypes so people can really experience what its like to ride a morph. What it's like to "get back the Z", meaning that you can go up and down, and not just ride around at 18-21" off the ground in a wheelchair. The Morph goes from bar-stool height in the high mode to a low and fast 13" off the ground for speed in low rider. Both modes are a thrill, but you just can't explain to people what it's like to be riding at bar stool height. You see everything in a new way compared to a wheelchair. So we need to make some prototypes and let people try it for themselves. More details about Move With Freedom, our non-profit, is at www.movewithfreedom.org.
Our previous iteration of the Morphing Handcycle wood model was much more complex in look and form, although all the joints are actually in the same place. The goal of bringing the Morph back to its "planar" and more "bike like" form has been achieve in the new red and black model. Nicely done, Alan.
Our previous design sought to move the rider load closer to the rear wheels, so the frame members moved to the outside. Nice idea, but the bike ended up with a wheelchair look, and it felt more complex. It also lost that "I've gotta have that" look and feel. So we want back to the drawing boards. (Well, Alan did.)
Ah, what a difference a day makes. Okay, many days. But now we have that beautiful look again, and the Morph has all the features and range that we're seeking.
Cool wheels, huh? That's plexiglass with a notch machined on the outer edge to hold O-rings. Hey, I get credit for that one.
Again, for contrast.
The magic of the blue joints. These are the magic links that make the seat bottom and the seat back adjust their angle as you morph up and down.
Note how far above the red main tube the back of the seat bottom is.
Now look at the red main tube. It rises almost to the bottom of the seat. But it doesn't tilt directly with the red main tube, which is how things used to work.