Reply With QuoteGo to YouTube and search for AutoExpert. John Cadogen has just posted a video explaining GVM, GCM, ball weight, payload, etc.
BTW, the reason you couldn't post in the D4 area is explained here: Can't post? Read this.
Fossicker
Hi, I am a little frantic and would appreciate some validation of my calculations please.... I purchased a single axle off road van with ATM of 2,700 kgs and a ball weight of 270kgs. I calculate when sensibly loaded with full water tanks that the ball weight will increase to about 320 kgs. I also purchased a 2013 SDV6 Disco 4 to tow the van with, assuming (wrongly I now believe) that it had ample power and as it was rated as 3,500kgs max tow weight and 350 kgs max ball weight it would handle the van with ease. If only I had done the calculations fully beforehand....
The Disco 4 has a Tare stated in the handbook of 2,546kgs.
The tank takes 82 litres of diesel. 10 litres I understand are included in Tare so the remaining 72 add 60kgs giving kerb weight of 2,606
The manual states the CGM of 3,240 is only valid with a ball weight of 150kgs or less. For every kilogram of ball weight over the 150, the CGM decreases by 1 kg. This means that the CGM if towing a 3,500kg van with a ball weight of 350KG will reduce to 3,040kgs.
This gives us a legal payload of 3,040 minus the kerb weight of 2,606 minus the ball weight of 350 equalling 84kgs!!!! Â… the wife and kids will need to stay at home and I will need to go on a diet to legally drive the rig... So, are my calculations incorrect, have I misunderstood the manual or did Land Rover have brain fade? Â…. you can tow a big van Mr customer,but you have to do so by yourself ....not fit for purpose I suggest....
I think my calcs are correct, but I would love them to be wrong...
With the van I purchased, I can just about squeeze in my wife and an esky... it has to be empty.. all recovery gear moved into the van.... Do I replace the car or the van?
Thanks
David
Major part of the heart and soul of AULRO.comGo to YouTube and search for AutoExpert. John Cadogen has just posted a video explaining GVM, GCM, ball weight, payload, etc.
BTW, the reason you couldn't post in the D4 area is explained here: Can't post? Read this.
Ron B.
VK2OTC
2003 L322 Range Rover Vogue 4.4 V8 Auto
2007 Yamaha XJR1300
Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA
RIP Bucko - Riding on Forever
Swaggie
You subtracted the full 350kg ball weight instead of the excess over 150kg, being 200kg, so have another 200kg to play with.
I can' t be sure but thought that LR allowed for the driver and a full tank of fuel in the tare, unlike other manufacturers.
MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
VK2HFG and APRS W1 digi, RTK base station using LoRa
ForumSage
SubscriberI haven't had a coffee yet so I am not keen to go through your calculations yet but I can add this...10% ball weight is nice because in my experience of towing it means no tail wagging. However 10% isn't necessary for speeds limited to 100kph and in Europe they generally run at a lower percentage. As a general rule you can either load the van for lower nose weight or have the manufacturer shift the axles of the van if possible to redistribute weight.
Check this out
Towball Weight and Trailer Stability
Why do you calculate when the water tanks are loaded the ball weight will increase to 320kg? Does the caravan manufacturer say that?
Our camper trailer is different to your van of course, but filling our tank reduces, not increases, the ball weight. I have seen other caravans the same.
Might be worth checking.
Swaggie
My van doesn't change ball weight with water tank filling as the tanks are centred over the axles, although once I split the tanks the ball weight will increase slightly as the primary rear empties while the front remains full.
MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
VK2HFG and APRS W1 digi, RTK base station using LoRa
Master
SubscriberI don’t know about not being fit for purpose. A Landcruiser 200 series has a payload of 610kg vs 675kg for a D4. Dual-cab utes look like a good tow vehicle with their large payloads until you realise the they can’t tow their max weight when the vehicle is at GVM.
Take the current Toyota Hilux SR5 max towing capacity manual 3500kg, auto.3200kg.
If you add the D4’s payload of 675kgs to the Hilux the towing capacity drops to manual 3135kg and auto. 2935 kg. If you get the higher optioned Hiluxs the towing capacity is even less.
Where as for a D4 GVM (3240kg)+Max Towing Weight (3500kg)= GCM (6740kg)
You don’t need the full 350kg ball weight. Get a scale for measuring ball weight. Change the weight distributionto to reduce the ball weight. Take it for a drive. How does it handle? Keep going until you find the reduced ball weight is affecting the handling. So now you know the limit. Increase the ball weight until the handling is not being adversely and that is your optimal ball weight.
It’s a bit of work but you will get some of those “lost” payload kgs back.
MY08 TDV6 D3 Zermatt Silver, B.A.S ECU Remap, ARB Bar, 12K Kingone Winch, 2x100Ah LiFePo4 Auxiliary Power, Safari Snorkel, Baja Rack Roof Rack, Brown Davis Aux. Tank, RWC, Front Runner Rear Ladder, Drifta Drawers, Doran TPMS, LLAMS, GAP IID BT.
Swaggie
And don't forget this,its in the D4 manual
" As long as you don’t exceed max axle weight, you can load up to 150kg on the towball without affecting payload"
ChatterBox
Also factor in your calculations that all Land Rover vehicle's "Tare weight" includes an allowance for a 90% fuel load and 75kg driver.
Life is just a series of obstacles preventing you from taking a nap.
RoverLord
GCM doesnt change regardless of how you load it.
using simple numbers
if your vehicle has a GVM of 2000KG and a GCM of 3000 KG and can tow a 1500KG trailer. (not going to worry about what the ball limit is here)
if you have your vehicle at 1500KG you can then tow your 1500KG trailer
if you have the vehicle at 2000KG you can only tow a 1000KG trailer.
there are limits you need to worry about... the tow pack limit, the vehicle limit in certain conditions (landies generally have an on road no brakes, on road w brakes, off road w no brakes and off road w brakes limit)
lets assume the tow pack is good for 3500 KG and the ball limit is 500 KG. The vehicle weighs 1500KG at tare (which for most landies that I have the books on is full fuel, full provided tools + seats + accessories +75KG driver) from the factory.
you put on a 1500KG trailer with a 500KG ball load and go for a drive. the car is 1500 the trailer is 1500. you get pulled at the weigh bridge and....
the car weighs 2000Kg and the trailer axle weighs 1000. Theres a 500KG transfer to the car. all good.
lets do that with car loaded up to 2000KG and a 1000KG trailer so you're good for GCM BUT theres a 100KG transfer to the car... you get weighed.
your car weighs in at 2100KG and the trailer axle comes in at 900KG. Your now over your GVM but not your GCM.
and then you have axle loadings.....
'
Dave
"In a Landrover the other vehicle is your crumple zone."
For spelling call Rogets, for mechanicing call me.
Fozzy, 2.25D SIII Ex DCA Ute
TdiautoManual d1 (gave it to the Mupion)
Archaeoptersix 1990 6x6 dual cab(This things staying)
If you've benefited from one or more of my posts please remember, your taxes paid for my skill sets, I'm just trying to make sure you get your monies worth.
If you think you're in front on the deal, pay it forwards.
| Search AULRO.com ONLY! |
Search All the Web! |
|---|
|
|
|
Bookmarks