A Long Pole
- Thread starter Wake Jake
- Start date
Bloody disappointing. Has your frame made it back there yet?
It's meant to arrive there today. So I will start hassling Leo at the end of the week.
beeb
Dr. Beebenson, PhD HA, ST, Offset (hons)
To my mind, changing the crappy bonded single lap-joint to a bonded tongue-in-groove/double lap-joint would probably remedy this issue (or at least make it a lot less likely). The CNC "tubes" are going to twist and distort under load, and there's no mechanical assistance to the bonding in the single lap joint used by Pole, so if the bonding has any flaws it'll just spread each as it loads and unloads in use (which with the cyclical nature of cycling, isn't going to be an ideal match...).
Ultra Lord
Hurts. Requires Money. And is nerdy.
You should email that to Leo. I’m sure he’d love unsolicited enginerding advice
beeb
Dr. Beebenson, PhD HA, ST, Offset (hons)
"Dear fuckhead..."
beeb
Dr. Beebenson, PhD HA, ST, Offset (hons)
Ultra Lord
Hurts. Requires Money. And is nerdy.
"Hey baby, how 'bout a triple riveted zigzag lap joint?"
ausdb
Being who he is
I wonder what sort of prep process they are using on the aluminium before they do the actual bonding and whether it is having any impact on the failure? Searching for info on composite to aluminium bonding in aerospace applications leads you down a rabbit hole of various anodising processes and treatments.
hifiandmtb
Sphincter beanie
Prep step 1: Take customer's money.
Prep step 2: Sit on it for months.
Prep step 3: Ship the frame.
Leo told me he was going to increase the wall thickness and give it more bridging on join.
Apparently the revised CADs for the CNC works will completed today. Surely changes to the design would have to through engineering, testing (both on paper and real world) first.
beeb
Dr. Beebenson, PhD HA, ST, Offset (hons)
Fingers crossed this is true for your sake.
Have they ever explained how they tested their concept? I like the way the Kavenz guys were completely transparent about failures on the test rig:
Nothing like this but he claims to have some videos that he hasn't posted yet. Wonder what they reasoning behind that is. The frame gets split in two by putting a bar through the headtube and twisting. Apparently 500kg of force is needed to seperate 30mm of bonded aluminium.
The 7075 also deflects 90° when distorted according to Mr Pole.
Last edited:
hifiandmtb
Sphincter beanie
Fuck me you & your brother & all your Pole mates must be fucking strong!
Leo inspected and 'tested" the frame straight away! Amazing what interwebz noise can do. Apparently could not see what I was on about and has deemed everything perfectly fine.
The steps can't 'develop' according to him these have always been there and are within tolerances as they've been machined down by hand.
I went over the frame after every ride after being aware it would most likely happen to me too after seeing my brothers.
I have photos from when the frame is new. The steps aren't even noticeable compared to now. So 'further testing' is happening today as I seem to be unsatisfied and lacking confidence in the frame. Who would have thought?
The optics and opinion is quite different so far.
The steps can't 'develop' according to him these have always been there and are within tolerances as they've been machined down by hand.
I went over the frame after every ride after being aware it would most likely happen to me too after seeing my brothers.
I have photos from when the frame is new. The steps aren't even noticeable compared to now. So 'further testing' is happening today as I seem to be unsatisfied and lacking confidence in the frame. Who would have thought?
The optics and opinion is quite different so far.
Last edited:
wkkie
It's Not Easy Being Green
?? Deemed it....?
Edited now. *perfectly fine