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  1. #1
    Join Date
    Feb 2015
    Location
    Oz
    Posts
    434

    Default A second trike 9or should that be seventh?)

    Not happy with the trike, it works great but just a few little niggles I'm not happy with: The welding is terrible, you can't see them, but I know they're there so that's enough for me. I've decided to suspend this one so presently waiting on a shocky. Undecided on whether to suspend just the rear end or suspend the seat: suspending the seat isolates both front and rear but there is a weight and height downside, probably weigh a few extra kgs and lift the seat height by around 70mm. On the other hand rear suspension isolated the rear end only (that's where most of the bumps are felt) and increases the weight by just whatever the shocky weighs.

    Other things I'm not happy with are a bit more obvious: Squab angle is slightly off making for a sore rear end on longer rides. No rack and the rear view vibrates a lot. Being made of RHS the tube isn't uniform in size so some joints aren't quite flat. no biggy, but once again I know it's there???

    Not a lot wrong, but enough for me to go back to the welding table.

    Thus far I've welded the seat back to follow my back shape and attached that to the main tube, welded the rear fork and cross beam, just waiting on the shocky before I can go any further. this time I've gone with 32x1.5mm tube for the main frame and cross beam, the rear forks are 35 x 19mm tube so size is uniform. The tube is a little heavier at 0.436kgs more than the RHS model but, that's offset by the lighter weight tube in the rear forks so weight should be just marginally heavier than Mach1. I've also changed to Lincoln 2.5s to help out the welding with RA problem.

    I'm so impressed by the lever steering that I'll be incorporating that again, camber I'm dropping from 5 degrees to 2.5 degrees and caster remains pretty much the same at 14 degrees.


    The frame in the background is the remains of a two wheeler I made a few months earlier. Didn't work due to my problem with balance. I'll be cutting the BB off this frame as they don't seem to be available anymore.
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  2. #2
    Join Date
    Feb 2015
    Location
    Oz
    Posts
    434

    Default

    One other thing to do: The trike tends to spin the rear wheel on loose, inclined surfaces so obviously I need more weight on the rear end. My rear end is as close as I can get to the rear wheel so the front wheels will have to be moved further forward. Can't move them too far due to heel strike on the wheel so I've settled on a compromise of around 70mm for the front wheel. I don't expect it will help too much but that's all I can think of other than going to a 20" rear wheel and that would necessitate a third gear set.

  3. #3
    Join Date
    Feb 2015
    Location
    Oz
    Posts
    434

    Default

    Made a bit of a boo boo with the suspension: didn't allow for my weight so had to make new mounts and order a shorter shocky. While waiting I spotted some cable guides in place, attached mounts for a rack, shaped a luggage rack, tacked the front deraileur mount on and attached the chain idlers. The new suspension now has nine settings in lieu of five, bit of a waste but it does look good. I'll attach a couple of chain idlers up front tomorrow and then it's just a matter of waiting for the shocky to arrive.
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