Recumbent project

[Yuxi]

Evening all,

I am making one of these http://www.recycledrecumbent.com/

Here is a picture of my first nights work. I am making it just for something to do really, and I had an old bike.

Has anybody else tried this?

[SystemParanoia]

make one of these instead!!!

they go for £6k+

[g_stacey]

Four brake levers on the Quad. How and what do they work? Just curious.

[pdV6]

g_stacey said:

Four brake levers on the Quad. How and what do they work? Just curious.

Four wheels on the quad, therefore 4 callipers.

Short of designing a new system from scratch, my guess is:
(a) it's easier to implement using existing parts and
(b) with practice you can steer the thing by braking individual wheels.

[Mekon]

there are 2 into 1 levers available for tadpole trikes already. Don't know why it doesn't use them

[pdV6]

See (b) above, perhaps?

[g_stacey]

It's an odd setup. You cant use just the lower levers without hitting the higher lever at the same time, but you can use the higher lever on its own. Are both right levers the front brake and the left levers the rear brake? Still cant work it out. Also it would be a 10 minute job to put a banjo/T joint to split the hose to feed 2 brakes. OK I'm going to take a guess that.................the levers on the right control the right side front and rear brakes and ditto for the left, maybe to lock/slide one side of the Quad to turn in quicker. Maybe.............or...............

[pdV6]

g_stacey said:

OK I'm going to take a guess that.................the levers on the right control the right side front and rear brakes and ditto for the left, maybe to lock/slide one side of the Quad to turn in quicker. Maybe.............or...............

That would be my guess. If you see the videos of them in action, it certainly looks (to me) like a lot of the steering is coming from the brakes on the twisty bits.

[groomi]

Yuxi said:

Evening all,

I am making one of these http://www.recycledrecumbent.com/

Here is a picture of my first nights work. I am making it just for something to do really, and I had an old bike.

Has anybody else tried this?

I made a recumbent trike for my A-level technology project. Used the rear triangle from an old mountain bike, lowered the upper struts from the triangle, fabricated a T frame and joined to the triangle, then had an adjustable sliding pedal position chained back to a modified pair of sprockets where the BB from the original triangle was which then fed traditional derailleur gears. Not a lightweight solution but did solve the problem of chain slop common on cheap recumbents.

I also machined my own uprights which unfortunately my teacher made me redraw the geometry for. The finished product demonstrated that my geometry was right and his was horribly wrong...

If I get time, I'll scan some piccies in.

[Yuxi]

groomi said:

I made a recumbent trike for my A-level technology project. Used the rear triangle from an old mountain bike, lowered the upper struts from the triangle, fabricated a T frame and joined to the triangle, then had an adjustable sliding pedal position chained back to a modified pair of sprockets where the BB from the original triangle was which then fed traditional derailleur gears. Not a lightweight solution but did solve the problem of chain slop common on cheap recumbents.

I also machined my own uprights which unfortunately my teacher made me redraw the geometry for. The finished product demonstrated that my geometry was right and his was horribly wrong...

If I get time, I'll scan some piccies in.

Heres tonights work!

Not sure about the back, I think I will cut the seat stays off the seat post and bend them down to the top of the white seat post, this will allow the seat to go further back but will something else to support the back of the seat.