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The following link gives a good explanation, 'nose down' and 'nose up', when I hitch up with the correct noseweight on, my van is very slightly nose down.

http://caravanchronicles.com/guides/understanding-the-dynamics-of-towing/

The car tow ball height from the ground is within the guidelines, I have 70kg noseweight on, (car max 75kg) the car boot has a good load in, steel awning poles, 8.6kg gas bottle (upright and secure), Cadac BBQ, trolley jack, large suitcase and other bits, well within rear axle load and GVW. When hitched up it just sits right and tows very well and stable. That’s the way I have been towing for many years, never thought of it like yourself as an engineer, but would be interested in the technical dynamics. So yes a bubble indicator on the floor would indicate a sloop downwards, but the main thing is the correct height of the cars towball from the ground. Also the cars suspension, if too soft the cars back end would drop and so would the caravans nose, that's why some will put on suspension aids / assistors.

My towing ratio is 82% so a good match all round.

Quote: Originally posted by Octavia4x4 on 12/3/2015

<font size="3" face="Times New Roman"><font face="Calibri">The car tow ball height from the ground is within the guidelines,I have 70kg noseweight on, (car max 75kg) the car boot has a good load in, steelawning poles, 8.6kg gas bottle (upright and secure), Cadac BBQ, trolley jack,large suitcase and other bits, well within rear axle load and GVW. When hitchedup it just sits right and tows very well and stable. That’s the way I have beentowing for many years, never thought of it like yourself as an engineer, but wouldbe interested in the technical dynamics. So yes a bubble indicator on the floor would indicate a sloop downwards, but the main thing is the correct height of the cars towball from the ground. Also the cars suspension, if too soft the cars back end would drop and so would the caravans nose, that's why some will put on suspension aids / assistors.

<font face="Calibri">My towing ratio is 82% so a goodmatch all round.

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