Hi,

Just inspecting underneath and I've discovered two large counterbalance weights on the very rear of the car (probably 10-15kg each), they swing around freely and they're next to the exhaust exits but not linked.

Anyone have any clever ideas what they're for ?

Cheers

David

Stop Travel sickness

Harmonic Mass Dampers

http://www.rrsport.co.uk/forum/topic35542....ar+weights

Nice - what genius decided that they would be a good idea ? I wonder how much they weigh ? Clearly got to have some effect on economy.

Will report back....

Don't take them off.

Yes. Leave alone. LR put them there for a reason
Plus your insurance may then be invalid etc Visitor from fullfatrr.com
* GONE. 2012 RR Sport HSE SDV6 Orkney Grey. Now being piloted by RRSTDV8
* Current: 2011 4.4 TDV8 Full Fat. Amazing piece of kit.
* Current. 1974 Lightweight 2.25L petrol. Old skool
* GONE. Freelander GS TD4 Manual MY2013. Orkney Grey with privacy, cold and clearview packs, armrests (a must!) and a spoiler.
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* 1949 80" in family since 1975

Thanks for the advise guys - much appreciated, will leave them alone.

TDV8_AutoB wrote:

Nice - what genius decided that they would be a good idea ? I wonder how much they weigh ? Clearly got to have some effect on economy.

Will report back....

are you sure a RRSport is the right car for you if your worrying about economy

Nah - not worrying about economy at all. It's better than the RS6 for sure. Just wondered what the heck they're for - now I know - but certainly they will effect economy, just like driving an aerodynamic brick also does.

Cheers

Any weight will affect economy, but when you consider the weight of the chassis and the rest of the vehicle, it pales into insignificance! Visiting from DISCO3.CO.UK
2006 Discovery 3 TDV6 Auto HSE Zambezi Silver

I used to be a helicopter technician and we used something similar in the nose to reduce harmonics, pimimtive but effective.

You could always try loosening your spare a little and seeing if the pendulum has the same effect.....

Quote:

You could always try loosening your spare a little and seeing if the pendulum has the same effect

Mr Messy wrote:

You could always try loosening your spare a little and seeing if the pendulum has the same effect.....

That's Assuming Nobody's already nicked it of course.

Cheers
Col

Mr Messy

Didn't that unit have to be "tuned" though (if it's the one I am thinking of)?

I worked on Westland Lynx for 15 years and the vibration absorber on top of the Main Rotor Head had to be tuned using a series of extra circular rings you bolted under the top cover. Used to love doing that job, we called it 'Bonk Testing' as you attached a piece of electrical kit to the vibration absorber to take the measurements and then 'bonked' it on the side with your hand.