Member Since: 16 Jul 2007
Location: Chicago
Posts: 1070
Speaking of composite, I'm pretty sure the tailgate/autoscalp is made out of composite materials to reduce weight.16 D4 Landmark
05 D3 HSE V8
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14th Jan 2017 9:05 pm
petersw
Member Since: 17 Nov 2012
Location: Norfolk
Posts: 1135
I think the "heavy" alloys are to make the D5 stiffer than the D4 for off roading.Peter
14th Jan 2017 9:52 pm
petersw
Member Since: 17 Nov 2012
Location: Norfolk
Posts: 1135
Quote:
Speaking of composite, I'm pretty sure the tailgate/autoscalp is made out of composite materials to reduce weight.
Yes & Magnesium
Click image to enlarge
Peter
14th Jan 2017 10:09 pm
Nikki
Member Since: 10 Mar 2015
Location: Melbourne
Posts: 140
Magnesium will burn amazingly hot!
14th Jan 2017 10:49 pm
Mr.Tom
Member Since: 01 Jun 2014
Location: St Neots
Posts: 1641
Don't know which alloys they use, but adding calcium reduces / stops it combusingSill protection - LED internal lights - LED reverse lights - boot liner - Dog Guard - Rock sliders
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MY16 D4 Landmark
Last edited by Mr.Tom on 14th Jan 2017 11:43 pm. Edited 1 time in total
14th Jan 2017 11:42 pm
Canburne
Member Since: 15 Jan 2013
Location: Devon
Posts: 2029
It is not just magnesium that does that. In the Falklands they discovered that the brand new super duper lightweight aluminum superstructures on the latest warships just melted and burnt when they were hit by incendiaries.
Later, as a consequence of the investigations into the melting aluminum, the wonderful new Lloyds building in London had to have all its swanky new aluminum framed windows replaced by steel frames because in a major fire all the aluminum frames would melt, all the glass would fall out causing the whole building to rapidly burn down..
"the inherent vice of capitalism is the unequal sharing of blessings....the inherent vice of socialism is the equal sharing of miseries" Winston Churchill
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2015 D4 HSE Aintree Green
14th Jan 2017 11:43 pm
petersw
Member Since: 17 Nov 2012
Location: Norfolk
Posts: 1135
Is this the same "heavy" alloy that they use in the Defenders as well as FFRR, RRS2 & D5 ?Peter
15th Jan 2017 7:26 am
chalky
Member Since: 22 Aug 2008
Location: Yorkshire
Posts: 3145
I think the reason PORSCHE use some composite body shell parts is mainly because they couldn't get the older engines to conform to stringent emmisions regs "See VW emmisions scandal" so they ditched galvanised steel panels in favour of plastic. Because Steel is heavy where by aluminium in comparison is relatively light.
One is a sports car and the other is an off roaderOnly dead fish go with the Flow !
15th Jan 2017 10:14 am
Walkzinho
Member Since: 01 Oct 2011
Location: Chester
Posts: 140
I have a friend in the factory at Solihull. Apparently a lot of D5's aren't leaving the lines after a big problem has been identified with the shell. He is saying that the new shell is flexing too much when towing, causing some instability. Im not sure of the full details but he also said its something to do with the new chassis being a monocoque instead of a great big lump of iron!
18th Jan 2017 2:52 pm
petersw
Member Since: 17 Nov 2012
Location: Norfolk
Posts: 1135
Is this affecting the FFRR & RRS 2
As the all share the same shell?
Peter
18th Jan 2017 3:10 pm
Pelyma
Member Since: 06 Jan 2005
Location: Patching, Sussex
Posts: 15496
chalky wrote:
I think the reason PORSCHE use some composite body shell parts is mainly because they couldn't get the older engines to conform to stringent emmisions regs "See VW emmisions scandal" so they ditched galvanised steel panels in favour of plastic. Because Steel is heavy where by aluminium in comparison is relatively light.
One is a sports car and the other is an off roader
Rolls Royce use composite wings on the Phantom, but I don't know why.DS3 TDV6 HSE - Silver with Alpaca (old one) Gone
DS3 TDV6 HSE- Silver with Alpaca (new one) Gone
D4 HSE Lux - Montalcino Red Gone
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18th Jan 2017 3:50 pm
chalky
Member Since: 22 Aug 2008
Location: Yorkshire
Posts: 3145
Yes they do, I think they are carbon fibre? We had a tracker in one that couldn't see out from the inside of the car so we fead the receiver thro the bulkhead and placed it under a wing, it couldn't get thro that either. The glass is coated inside and out so the Signal couldn't get in or out,?
Presumably they are carbon because they are so big.
And as for the Flex ? I can't see that at all....... as said above the FFRR & RRS both tow particularly well.
I said before either in this post or another that we specced an work SVR with a solid roof, we were told it wouldn't make the slightest bit of difference in weight or rigidity. It appears it's more rigid with a solid roof. And one of the LR drivers confirmed this after eating his hat !Only dead fish go with the Flow !
18th Jan 2017 4:23 pm
J77
Member Since: 03 Mar 2008
Location: Fife
Posts: 6261
petersw wrote:
Is this affecting the FFRR & RRS 2
As the all share the same shell?
Correct!
Fl2 was a monocoque and DS also, no flex from them, granted they don't tow as much.
I think one thing that might cause problems will be the tailgate struts.23.5MY Defender 90 X-Dynamic SE D250 MHEV Pangea Green
18th Jan 2017 7:11 pm
RDR
Member Since: 24 Mar 2013
Location: Derbyshire
Posts: 2260
The key to designing these modern one piece things is in the engineering and design of the structure, you need to carefully place braces, lips and reinforcing for the particular shape to counter or allow flex. So even if FFRR and RRS is on the same line they will be different as the body structure is different.
They can fix it though MY06 S - Gone but not forgotten
MY12 HSE - Gone
MY16 HSE Luxury - Sold
MY20 D5 HSE - Sold
Current RR L460 PHEV
18th Jan 2017 8:41 pm
J77
Member Since: 03 Mar 2008
Location: Fife
Posts: 6261
Surely it should be all D5s? They're all built the same so if one flexes they all will flex.
I don't see it myself but it's LR so anything can happen.23.5MY Defender 90 X-Dynamic SE D250 MHEV Pangea Green
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