Trike Mark-3 swing-arms constructed

Continuing the saga, converting a tadpole recumbent trike to have front suspension, here are recent posts:

• Trike 320 frame rear fork large gap — June 13, 2024
• Recumbent trike front suspension Mark-3 — June 01, 2024
• Ackermann steering compensation — May 31, 2024
• Trike steering cannot kick the can down the road anymore — May 23, 2024
• Weight of an electric recumbent tadpole trike — May 18, 2024

Mark-3 is a rebuild with steel, and welded. I have done the same also for the swing-arms (A-frames or wishbones). Here is the design:

Here is the SolveSpace file of the swing-arm design, with false ".gz" appended:

arms-15b.slvs.gz

I used the same 20x20mm square tube as for the main frame. The steel bar is 25x3mm.

Photo of the swing-arms and shock-absorbers attached to the frame:

...painted black, the welding looks OK!

Put it on my bathroom scale; just on 5kg. Not light, but as I discussed in "Weight of an electric recumbent trike" post, see link above, it is only a small part of the total weight.    

Tags: light