A wooden board under F1 Car

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xwg
xwg
0
Joined: 30 Jun 2003, 09:34

A wooden board under F1 Car

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I only konw that F1 car has a wood board under carbody.It necessary that distance higer than 70mm over road.I want know more informations about wood board: function ,structure and size etc.

Guest
Guest
0

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It is the skid block under the reference surface. Its there for many reasons mostly visible in the regs, its size is listed there to. I do have a cad model of a party done F1 car i designed along with pictures and article at:

http://www.geocities.com/rough_wood

Monstrobolaxa
Monstrobolaxa
1
Joined: 28 Dec 2002, 23:36
Location: Covilhã, Portugal (and sometimes in Évora)

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Well...after a week off....I'm back!!!! hehe...

Well the skid block has to obey to some rules...which I'll have to post next time cause I left the terchnical regs at home! :P

And it's not 100% wood....it's a kind of composite made from wood fibres and a benzo fenolic resin. I contacted Jordan enquiring about the skid block and the only thing thety replied was that it was wooden!!!!this means that it isn't wood but most of it is wood (the fibres)!

A composite is made up by 2 parts the resin and the reinforcement (in this case the fibres). When you look at a tree you see wood fibres and cellulosic resin! In F1 the only thing they do is change the resin!´~

Minardi for instance uses something very similar to ply wood and using special oils and vacum processes they are able to make this "composite", which has to heavier then water (according to the regs...and don't forget...wood isn't)! :lol:

Monstrobolaxa
Monstrobolaxa
1
Joined: 28 Dec 2002, 23:36
Location: Covilhã, Portugal (and sometimes in Évora)

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Like I promised here are the regs for the skid block!

I'd like to correct something from my first post....the resin used is a termo-phenolic resin and not benzo-phenolic resin!

Like I mention the skid block has to be heavier then water...article 3.13.1 line b) .....to give you an idea water has a specific gravity of 1 (one)!

3.13 Skid block :
3.13.1 Beneath the surface formed by all parts lying on the
reference plane, a rectangular skid block, with a 50mm
radius (+/-2mm) on each front corner, must be fitted.
This skid block may comprise more than one piece but
must :
a) extend longitudinally from a point lying 330mm
behind the front wheel centre line to the centre line
of the rear wheels.
b) be made from an homogeneous material with a
specific gravity between 1.3 and 1.45.
c) have a width of 300mm with a tolerance of +/-
2mm.
d) have a thickness of 10mm with a tolerance of +/-
1mm.
e) have a uniform thickness when new.
f) have no holes or cut outs other than those
necessary to fit the fasteners permitted by 3.13.2
or those holes specifically mentioned in g) below.
g) have seven precisely placed holes the positions of
which are detailed in Drawing 1. In order to
establish the conformity of the skid block after use,
it's thickness will only be measured in the four
50mm diameter holes and the two forward 80mm
diameter holes.
Four further 10 mm diameter holes are
permitted provided their sole purpose is to
allow access to the bolts which secure the
Accident Data Recorder to the survival cell.
h) be fixed symmetrically about the centre line of the
car in such a way that no air may pass between it
and the surface formed by the parts lying on the
reference plane.
3.13.2 Fasteners used to attach the skid block to the car must :
a) have a total area no greater than 40000mm² when
viewed from directly beneath the car ;
b) be no greater than 2000mm² in area individually
when viewed from directly beneath the car ;
c) be fitted in order that their entire lower surfaces
are visible from directly beneath the car.
When the skid block is new, ten of the fasteners
may be flush with it’s lower surface but the
remainder may be no more than 8mm below the
reference plane.
3.13.3 The lower edge of the periphery of the skid block may be
chamfered at an angle of 30° to a depth of 8mm, the
trailing edge however may be chamfered over a distance
of 200mm to a depth of 8mm.




If anyone has any other questions about the skid block or otrher topics....especially aerodynamics....just ask!

Robert Blaschke
Robert Blaschke
0
Joined: 28 Mar 2009, 19:08

Re: a wooden board under F1 Car

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I have read in wikipedia, that skid block was introduced after Senna's death in 1994. Know anybody when exactly and if it was always of the shape of todays regulations? Know anybody the history of skid block?

And what about lower part of fuselage, 500mm wide and 50 mm high? It came with the skid block, or it was here alrady before it?

manchild
manchild
12
Joined: 03 Jun 2005, 10:54

Re: a wooden board under F1 Car

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It came with skid block. Up till than floors were flat. I think that regulations regarding haven't changed in that area.

Robert Blaschke
Robert Blaschke
0
Joined: 28 Mar 2009, 19:08

Re: a wooden board under F1 Car

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Thank you. So if I get it right, Senna's FW16 has flat bottom in Imola. From what GP 1994 then skid block had to be used?

Robert Blaschke
Robert Blaschke
0
Joined: 28 Mar 2009, 19:08

Re: a wooden board under F1 Car

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So I was told on another forum, that skid block came from GP Germany 1994.

piast9
piast9
20
Joined: 16 Mar 2010, 00:39

Re: a wooden board under F1 Car

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Yep, according to the old season reviews, the plank came for 1994 German GP while the stepped bottom was introduced in 1995 season. In rest of 1994 races there was a plank but the rest of the floor was flat.

shamikaze
shamikaze
0
Joined: 06 May 2010, 09:05

Re: a wooden board under F1 Car

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If my memory serves me well, it was indeed in Germany that is was introduced. Shortly after the Senna incident there was another major crashrelated to high-speed in a corner.

The original purpose (again, if memory serves me right) was to reduce teh aero-downforce. The FIA thought this to be easiest achieved by fixing the wooden board to break the flat undertray of the car as to reduce it's maximum aerodynamic force. The flat undertrays where generating so much DF allowing for insane speeds in the turns. The speeds where that high that no driver ever could correct it anymore. If the car lost his balance, tyres could not cope with the friction/grip and just kept skidding or burn themselves out and cause a major shunt. Comine that with the survial-cell quality etc at the time and I actually think this was a good decission. Maybe it would be good to revise that with the 2013 regulations when they go for the smaller turbo-blown enigine. I also feel that increasing downforce here would increase the chances over overtaking manouevres since a larger part of DF and grip would come fromaero-devices not soo much troubled by dirty-air from following a car closely. It would allow competitors to follow each-other closer.

But as stated, the above is from memory and at the time I was 16 so might be off a little ;)