We have a scooter. It's a Suzuki Address 110 and weighs 100Kg so should be OK
for fitting on a rack on the van. But first some calculations are needed to
ensure the van is operated safely.
The original Peugeot plate shows a GVM of 3300kg. This seemed at odds with
some other specs I had read so I queried it with Autosleepers. Apparently it
should have had a small mod before delivery which uprates the GVM. I
contacted Autosleepers in 2014 and they carried out the modification and
fitted a new plate.
The new chassis plate shows that the rear Axle can take up to 2000kg, and
the front Axle up to 1750kg, but the combined weight can only be 3500kg or
less.
The handbook indicates that Mass in Running order is 2780kg. Subtract that
from the 3300kg maximum weight and we get the 520kg. BUT the upgrade boosts
this to 720kg Hoo bloody ray!!!
The handbook also suggests that after taking typical figures for equipment and
personal effects, the typical weight left over is 224kg. Now I usually
travel with my wife and dog which will add around 75kg. That leaves 149kg. Now
the scooter and the rack together weigh 130kg so there would appear to be only
19kg to spare IF I had not had the modification. But now I have 219 kg to
spare!
What I need to do is to load up the van as it would be for travelling and get
it onto a weighbridge. If the total weight is more than 3370kg I will need to
think about how to get the weight down before fitting a scooter rack, but I
don't think it will be close to that.
I'm heading North for Christmas so the plan is to get the van loaded as much
as possible. get it weighed, then weigh any extra bits going in and out.
After that I can work out the effect of the scooter on each axle.
The handbook also shows the weight on each axle in "Running Order". This
totals the 2780 or the "Mass in running order" shown above. The modification
to the suspension has increased the MTPLM Rear to 2000kg.
But this also tells me the distribution of the weight. As the scooter will be
behind the back axle it will actually reduce the weight on the front axle and
increase the weight on the back axle by more than the weight of the scooter
and the rack. The distance from the back axle to the back bumper is 1.7m.
The overhang of a Watling carrier is 450cm, but I estimate the centre of
gravity (COG)to be around 300cm behind the bumper. So COG of the scooter and
rack is 2m behind the axle.
The distance between axles is 3m and the weight of the scooter plus rack is
130kg. So the uplift on the front axle is 2/3 x 130
kg or 86kg and the downward force on the back axle is 217kg.
Now, if I were to load up to the original handbook limits I'd only be adding
130kg which is less than the extra 200kg allowed.
The original spec allowed 520kg as max user payload.
If we used up to this figure, and it was distributed evenly
it would be 260kg per axle. i.e. 1568kg on the front and 1732kg rear. The
scooter would change this to 1481kg front and 1949kg rear. This gives us
margins of 269kg front and 51kg rear and 70kg GVM.
Now we are unlikely to use up to the 520kg anyway, (the weighbridge will
reveal all) so there seems to be no obstacles to getting the rack fitted.
It would seem prudent to stow any heavy items (such as extra water, and the
passenger!) as far forward as possible.
So I went to a public weighbridge - Kernow grain services
They measured the weight of the van with me my wife and the dog in it, and not
a lot else as 3380kg. According to the manual the Mass in Running Order (MRO)
is 2780kg. That includes the essential habitation equipment and the driver.
Other bits and pieces, (including the wife) may total arround 100kg so that
would be around 3000kg.
The weighbridge disagreed by 500kg!
The rear axle weight was measured as 1860kg. The manual says 1472. Add around
50kg for bits and pieces and that would be 1520 - so disagreement is 338kg.
They did not measure the front - but derived that from total - rear to give
1520kg or a disagreement of 162kg
I find it difficult to believe that the van is half a tonne heavier than the book
weight - that is five motor scooters! Three and a
half on the back and one and a half on the front. Maybe a previous owner has
used it for smuggling and the chassis is filled with gold bars! Or more
probably the weighbridge needs calibrating. The general opinion on the
Autosleepers Owners forum is that the manual is pretty correct.
I think I'll go with the manual figures.
NOW the calculation
Wheelbase is 3 meters
Overhang is about 2 meters
So any weight on the end of the overhang will result in - 2/3 of the weight on
the front axle. So if scooter + rack = 130Kg then uplift on the front is
87Kg.
The weight on the back wheels will go up by the weight of the rack and
scooter plus this 87Kg. or 217Kg.
But we need to know what the weight was on the axles without the scooter or
rack. The handbook gives us 1308 front and 1472 in running order - which is
without any payload. If we add the max
original payload of 520Kg and distribute that
between the two axles it gives 1568 front plus 1732 rear.
If we now add in the effect of the scooter and rack we get 1483 front and 1945
rear. The rear is 97% of maximum allowed! That is a little close for me. .
Dammit - I think I've just calculated myself out of the idea.
BUT there IS a solution. The
Easy Lifter Hydra Trail
has its own wheels on casters and is rigidly fixed to the tow-bar. OK, I
don't have a tow-bar so that is and additional cost over the £1600 for the
"trailer". But it would fit on any vehicle with a tow-bar. So that will
cost me over £2000 including the tow-bar. But I guess it's an investment.
Downside is the increased length of the van, and the resultant difficulty in
parking. In particular the inability to put the overhang over the grass
verge of a car park so we can squeeze into a car space. Also, even without
the trailer being attached the ground clearance at the overhang is
drastically reduced.
A two seater ebike would also be an option. These are around 30Kg and so
could be carried on the bike rack. But they currently retail at around £2500
which I think is too dear. My scooter was only £2300.
Realistically, if we had the scooter with us we would still be reluctant to leave the dog alone in the van for more than an hour or so.
Oh well.
