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Recumbent tadpole trike: Posts on Velomobileforum p.10

I have recently built about 4 possible versions of the tilting mechanism I have beem toying with in my very informal test stand. Here are some pictures of the one I think will work the best.



 

This is pretty much like I think it will be on the actual trike. The orientation on the outer tilting assembly may change a bit but it will be very similar to this. The shocks that are visible should be the ones I use. The tilt arm on the center shaft will be very similar. 

At this point I have gotten the general outline of what I want to do sketched out in my mind. I have another bathroom to work up and a garage shop to work up before I get back to this little project. Time to get some of the things I put off during the winter done so I can get back to the trike. 

The things I have been figuring out lately have been the way to get my steering kingpins made and I think that by using a female heim joint and a longer bolt with a spacer to hold the extension of the heim joint I can get the adjustment of the camber accomplished.  I will get a picture up sometime of the general idea.

I have been considering galvanic corrosion using steel bolts in aluminum square tube.  I initially felt that stainless steel would eliminate the problem. After consulting a galvanic chart and various other sources I believe I was incorrect. The stainless and aluminum combination will also have very serious corrosion problems. It would appear that zinc and aluminum are fairly compatible somewhat to my surprise. I am thinking that bolts hot dipped in zinc and wet installed using an insulative RTV product would be the way to go. I believe this will eliminate or reduce the galvanic corrosion from being a problem. Only time will tell... at least I live where it is dry so it should be of little consequence anyway.

TTFN
Ceeann

Comments

  1. MeAugust 17, 2018 at 12:53 PM

    Ceeann how will this interact with the steering mechanics of the XYZ? I've been pondering a quad of similar design for some time and the steering is amazing for its simplicity but seems to constraint tilt and shock options.

    ReplyDelete
  2. dichotomyoneDecember 22, 2018 at 7:23 AM

    Sorry this took so long to reply. This bit I have shown here was mostly concerned with determining if the XYZ format would work for a tilting trike. The tilting in the front wheels as I show will most certainly work with off the shelf components. Steering is of course next on the list of things to do. Unfortunately our bathroom plumbing basically exploded about the time you commented and I stopped commenting here and started working on household projects like water and bathing facilities. In short the steering must tilt with the front wheels and although I am not married to the paddle steering in the XYZ it is probably the best form for a tilting trike of this form. If there is any justice we will complete the pretty upscale master bathroom we are building this winter, and I will pull together another more business related project this spring, and get back to the trike in late spring and early summer. BTW I also work full time... LOL...

    ReplyDelete
  3. dichotomyoneDecember 22, 2018 at 7:38 AM

    Below is a link to my sketches on how I think the steering would work based on the work of someone who got a tilting trike to function. You may have to cut and past this into your browser.

    https://www.velomobilforum.de/forum/index.php?threads/eigenbau-xyz-spaceframe-vehicle.33109/page-25

    ReplyDelete

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