The Delta 2WD unit that I made from freewheel screw-on units was a little "heavy" at over 1Kg.
Today I made new screw-in parts out of aluminium, that provide the drive connections from the driven free-wheels to the rear wheel axles.
The steel ones were 164grammes each.
The Aluminium ones are 62grammes each. That's 200grammes saved.
Important? Probably not, but every little helps.
And in that vein I have been looking at what material to make the half-shaft axles out of.
My preferred choice would be 12mm x 2mm walled precision tube as it will be light and strong.
I looked at what size "pins/bolts" to use to secure the half-shafts to the 2WD and I think M5 bolts through the centre will be fine as these have a shear strength of over 8 Knm (I think that is about 6,000 ft/lbs and my legs aren't that strong.
Today I made new screw-in parts out of aluminium, that provide the drive connections from the driven free-wheels to the rear wheel axles.
The steel ones were 164grammes each.
The Aluminium ones are 62grammes each. That's 200grammes saved.
Important? Probably not, but every little helps.
And in that vein I have been looking at what material to make the half-shaft axles out of.
My preferred choice would be 12mm x 2mm walled precision tube as it will be light and strong.
I looked at what size "pins/bolts" to use to secure the half-shafts to the 2WD and I think M5 bolts through the centre will be fine as these have a shear strength of over 8 Knm (I think that is about 6,000 ft/lbs and my legs aren't that strong.