What is a Bogie, please explain

[Dot]

Could we have got away with putting one of those in our conversion rather than the stretching thing??

[T1 Terry]

Could we have got away with putting one of those in our conversion rather than the stretching thing??

Yes, sort of, the rear suspension system would have needed modification and brakes on 2 extra wheels but that's about it. Stretching the chassis gave you more inside room though so probably the better of the 2 evils.

T1 Terry

[BruceS]

Another benefit can be the increased legal carrying weight allowed.
Have you weighed your unit all loaded up with water, food & other essentials Dot?
Have you worked out if you have much between actual weight & legal capacity?

[Dot]

Nup, when we weighed the bus for the rego etc it was under 9T we put extra weight in to simulate the washing mach, cupboards and food. Had tanks full of water. Our GVM is 11.25T so I can eat myself even plumper and load up with my Baileys and Brown Bros.. woo hoo

[ALAN 41]

Terry also mentioned Spread axles.

I didn't think he was that old.


They were outlawed years ago.

[BruceS]

Yes Alan........ we're all spreading a bit ........

The last new trailer I bought was a 10-1 tri .......... pulled by a single axle 1418 so I needed the grunt in the middle of the trailer. Still had it flattened out a few times though!

[ALAN 41]

Yes Alan........ we're all spreading a bit ........

The last new trailer I bought was a 10-1 tri .......... pulled by a single axle 1418 so I needed the grunt in the middle of the trailer. Still had it flattened out a few times though!

Know the feeling Bruce, my first trailer was a 38ft Freighter 3 way spread.
Almost pulled the old 1418 coe single drive apart when I tried to do a U turn in the yard at the old Rozella plant at Richmond with 18 ton on it.
Not easy to close with a 1418 and a loaded trailer either.

[John M]

Terry also mentioned Spread axles.

I didn't think he was that old.


They were outlawed years ago.

From memory, the old 9ft 1'' spread was the biggest allowed, I used to drag a milk tanker with a 9.1 spread used to work like a disc plow if you had to do a tight turn, used to really churn up the road at Dandy Cheese had to back into the shed from a jackknife, if you gave it too much you could roll the tyres off the rims, only ever did it once, not pleasant changing tires with the rig parked across the road blocking traffic (from memory, Stud Rd).
The company soon shut the spread, too many complaints from cockies

[Geoff Clifton]

I need your guidance Terry. How do these Ackerman linkages increment the inner wheel greater than the outer? For all I can see if the rack is moved 50mm left or right then the wheels will turn identically on the kingpins ???

[T1 Terry]

Never said i understood it Geoff, that's why I put in the link Did you mean the rack shift or the rake change? The rake or toe in/ toe out changes as the wheels are turn as a factor of the kingpin angle and castor/camber, it's got another term but buggered if I can remember it is at the moment. A macpherson strut and wishbone suspension achieves a similar action with a combination of toe in/out and caster/camber by moving the top member forward or behind the lower pivot point. This can not be changed on a solid front axle type suspension so the Ackermann principle becomes a bigger issue when the wheel base is changed, things like wedges between the axle and spring to change the castor angle etc. A science in itself best left to the specialists, not the bloke at the local tyre store with a computer wheel aligner that he drops in a card or looks up the model vehicle from a drop down menu, this is real specialist stuff and sadly a dieing art like many of the true mechanical master crafts.

T1 Terry