Took the third-wheeled cargo carrier out for a little ride and uh
wow that's loud :(
Didn't think about that. The wheel attaching to the bin directly means it acts like a drumhead and it's REALLY loud.
I mean it's not damages your hearing loud but EVERYONE hears you
considering idk maybe a hinge to keep it off the ground when not loaded or maybe just angling it so it's only low to the ground on heavier weights. dunno.
on the plus side, it works fine, handles turns, generally good.
@moira Did you add some play to the connection between the trailer and bike, or how are the three wheels not adding more stress under vertical transitions? Looking at your pictures the metal lever arm is pretty long, might be better to move the support forward & up, into the triangle or right off that corner maybe. Span metal between the triangle tubes + back with plastic that allows it to be clamped to the round? I've a friend that weaves a trailer hitch out of inner tubes as a pocket there
@enobacon There is play between trailer and bike in the form of a long section of the connector which is just a heavy spring, no metal tubing around it at all.
That spring handles the vertical transitions fine (afaict) and is one of the intended purposes for it. (The other being leading turns, of course.)
I can't move the trailer attachment point any more forward because it starts to risk the trailer hitting the back wheel on turns and that's obviously also dangerous to the back wheel of the bike. If I moved it into the triangle it wouldn't be a risk, it would be a certainty. Even moving up to the axis comes uncomfortably close.
(This is part of why I designed and built the hitch adapter with that extended arm. It was a necessity.)
@moira maybe consider extending the trailer tongue, cutting and sleeving the tube might be easier than making this extended connection point mounting bear that leverage, but try some steep driveway transitions, that end of the extension moves up and down much more than near the axle. Either way, a backup strap is a good plan to reduce the drama of any incidents.
@enobacon i've already tried it on extreme hills, i live atop one
also it has a backup strap. it has one for the spring and also for the bike.
but none of this has anything to do with the loud noise from the new third wheel being attached to the cart. basically the cart is acting like a drumhead for road noise and it's incredibly loud so I don't know why you're talking about the trailer attachment anyway
@moira the scooter wheel in the middle of the tub is going to be loud without some stiffening, pneumatic/softer tire, damper/sandbag as cargo.
But I'm not clear about your design whether the caster is supposed to always ride on the ground, it seems like that's going to lever the rear wheels up as you cross any sharp crest. I suggest either add flex so the bike carries no weight and trailer is always on three wheels or extend tongue forward and no caster/noise.
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