45/55 seater Coach turning circle ?? - autumnboy

Anyone tell me the approx. turning circle of a 45/60 seater coach to the outer edge of a coach body on full lock.

thanks

45/55 seater Coach turning circle ?? - injection doc

Depends on the chassis, ie Volvo, Daf AEC Scania etc.

I use to drive AEC duple dominants and they would turn quite well but the Volvo chassis ones were dreadfull ! infact the Volvo ones wouldnt even make the turn in Sloane Square London without a reverse !

Our Leyland TPL's were also very good. Never measured the turning circle but approx double the width of an average side road, but watch the back end against lamp posts !

45/55 seater Coach turning circle ?? - injection doc

For example this Volvo BR7 has a turning cuircle of 10.75 mtrs

Edited by injection doc on 30/03/2011 at 11:28

45/55 seater Coach turning circle ?? - autumnboy

thanks,

The coach in question is a Volvo B12B Plaxton Paragon

Company thinking of buying one if good enough.

thanks again

45/55 seater Coach turning circle ?? - craneboy

Just out of interest.. didn't a lot of older coach chassis's (60's/70's) have Chinese six, twinsteer setups? Why did that seem to be phased out? It must have helped enormously with manovering I would have thought.

Edited by craneboy on 31/03/2011 at 23:03

45/55 seater Coach turning circle ?? - Berisford

The Vega Major depicted in the top plate here would need one heck of a space in which to turn around!

http://wakefield-files.freehostia.com/covers_from_bedford_val_sale_bro.htm

Those Bedford VAL's were b*****s to drive, mainly because the steering was heavy and they took too much stopping. Air over hydraulic might have been ok without the 52 passengers on board but fully loaded you needed plenty of upper leg strength.

Edited by Berisford on 31/03/2011 at 23:16

45/55 seater Coach turning circle ?? - Avant

"For example this Volvo BR7 has a turning circle of 10.75 mtrs"

Really? That's about the same as a Fiat 500....

45/55 seater Coach turning circle ?? - autumnboy

thanks,

But this coach in question is on a 09 plt.

thanks for the humour anyway.

45/55 seater Coach turning circle ?? - jc2

Most modern coaches have a wheelbase little longer than a large car-just a lot of overhang at both ends-to make them manoevrable.

45/55 seater Coach turning circle ?? - injection doc

Avant "10.25 mtrs really ! "

http://www.volvo.com/NR/rdonlyres/6FB6E80B-7882-48E5-B0F0-1DAA282798CA/0/B7RBusBrochure.pdf

SMALL TURNING CIRCLE. Volvo B7R

has an integral hydraulic power assisted

steering system. Steering area is of

circulating ball-and-nut type with a

reduction ratio of 20.1:1. The maximum

deflection of the inner front wheel is 53 deg.

With a 6.2m wheelbase, the B7R has a

turning radius of 10.25 mtrs

45/55 seater Coach turning circle ?? - injection doc

The turning may be different depending on the Body build and do you know if its the tri-axle model ?

Some of the Volvo coaches I drove were sluggish moving away but great at motorway cruising ! Scania's were brilliant and TPL's pulled like a train. Daf Berkoffs were as slow as a dog & very thirsty.

Some of our Volvos I think had restricted turning to reduce tyre wear !

45/55 seater Coach turning circle ?? - autumnboy

Thanks,

The Volvo B12B is basically the same as the B7R with a more powerfull engine etc. Also I've found out its a Plaxton Panther, not a Paragon as I was told.

In this link is the model of coach for information purposes only.

http://www.bobvalecoachsales.com/coaches/L4069.html

thanks

45/55 seater Coach turning circle ?? - injection doc

"Plaxton Panther " nice body with good driver ergonomics and powerful engine. I hope you enjoy. I do miss my coaching days.

45/55 seater Coach turning circle ?? - Manatee

A turning radius of 10.25m means a turning circle of 20.5m, probably plus the body overhangs.

45/55 seater Coach turning circle ?? - Avant

"Radius" explains everything!

While we're on coaches, forgive my ignorance but why is it that most urban buses (reasonably enough) have automatic gearboxes, coaches generally seem to have manuals (as does the Volvo above)?

45/55 seater Coach turning circle ?? - pcvpilotmick

Urban buses are automatics for mainly financial reasons.

No clutch to wear out and have to replace

Less wear and tear on the drivers left leg. Can you imagine how many gear changes would be made on an 8 hour shift on an urban bus route?

Autos cant be abused/thrashed by novice drivers.

We had some Mercedes 709D minibuses many years ago that were going through clutches on average once every four months. Each vehicle was converted to auto at a cost of around £3000, which was recouped in less than two years on the cost savings of clutches, off road time, etc.

Cant say much about coaches, but as far as I know a manual gearbox will achieve slightly better fuel economy on a run, and most coaches spend a large part of their life on motorways with far less stop start driving that is bus service work.

45/55 seater Coach turning circle ?? - injection doc

Service work coaches will be mostly semi or fully automatic. The autos tend to be slower and thirstier. The semis autos were good for stop start and does save on clutch wear.

Some rear engine coaches can be difficult to drive as a manual as its impossible to hear or feel the engine when pulling away and you rely on the rev counter, so semi auto is better then for wear and tear. The down side is the wear on brakes with auto's and use of the retarders was a must. Coming of a slip road at full speed brakes used to fade before coming to a stop when fully loaded if a retarder wasnt used. Especially when doing booz cruises with a boot full of beer! 100 crates wheighs a Ton ! 53 passengers all carrying 5 or 6 crates ! well over weight comming of a ferry ! once a boot falls out on a motorway you dontr overload them again ! lesson learnt

45/55 seater Coach turning circle ?? - autumnboy

Sorry for saying this,

whats these last 3 posts got to with the original question ?

Edited by autumnboy on 03/04/2011 at 00:45

45/55 seater Coach turning circle ?? - Avant

Don't worry - it's called 'thread drift' and it happens on forums just as it happens in real conversations. By all means resurrect the original question if you like.

But I'm still surprised that all modern coaches aren't autiomatics.