Already a little more nineties: Joest Porsche 962C Donington 1990

[stijnbamps1]

Hi there,

I've just finished my Repsol Brun 962c and I'm already working on a new 962C. This time, it's going to be a little more challenging, as I'm scratchbuilding for the first time.
The car I'm going to depict is the Joest Porsche Chassis #145, which is one of the versions the Joest team developed in cooperation with Norbert Singer. Although not as successfull as the Jag's, the Mazda's and the Merc's of that time, these remote wing 962C's formed the basis for a couple of Le Mans winning cars later on in the nineties.

Plus, it's a Porsche!

Plus, it's a 962C!










Today I've cut off the rear wing and the taillights and I've put on some Miliput to make the small imperfections disappear. I've also test fitted it on the chassis and it looks like everything is falling in it's place.

Tomorrow I'm going to sand it a bit and give it the first coat of primer.



This last picture is taken with the wheels I'm going to use. They're taken from a Hasegawa Nissan R89C kit, which isn't that good anyway.

Please feel free to leave some comment, as there is some learning involved!


Cheers,


Stijn

[bigfrit]

Look who's on a roll!

I am impressed by your progressions, stijn!

Lovely how you do all the pics and stuff, I am surely looking forward to seeing this puppy built up, keep the update (and update pics) coming!

Oli

[Tamar]

Hello Stijn

According to http://www.racingsportscars.com Chassis # 145 that Joest raced at Donnington looked like this



The car shown in your post is the nr 014 chassis Joest entered for Konrad Motorsport at LM 1991


Joest started experimenting with "Shorter" Shorttails in 1988/1989 when the FIA announced their plans to scrap the 1000km races
and fuel limitation rules in favor of 480Kms sprints and a new engine formula of (F1 derived) non turbo 3,5 l engines.
Reducing the advantage of the "lowdrag, fuel efficient longtail" on all tracks but Le Mans.

Besides #145 almost all other Joest chassis (#004, #011, #012, #014 and #129) ran in this "cut off, seperate wing" configuration.
Even with the added chicanes at the Mulsanne Straight Joest stuck with the "longtail" for Le Mans 1990, but soon found out that the time gained from making 1 stop less did not counter the loss of downforce on a now much twistier track.
So for LM 1991 they raced #145 with the seperate wing, but the handicaps awarded to the turbo'ed 962's were too big to overcome.

Note: Depending on which chassis/race/period you choose you will have to cut a bit more of the back of the car.
As for some it was more than just taking the sidemounted fins off and running a seperate wing.

Good luck with your build, I'm sure it will look as great as your other projects

with kind regards
Tamar

[stijnbamps1]

Thanx Tamar for the extra info!

I know the first picture isn't the right one. I took it from the Prototype C game, but the rest of the story was new to me.
I've seen a couple of pictures where the Joest team raced the "normal tailed" 962C alongside the 962 "Evo's".
Do you have some more reference on the back end of the car? I don't know how the wing is attached to the chassis. I've seen a picture on mulsannescorner.com of the car's undertray, where the middle section was a bit longer, but for the rest... no reference!


Thank's


Stijn

P.S. I've found an error in my rims. It seems that the front rims also have 6 spokes instead of 5. That's why i'm going to use the rear rims of another scrapped r89c, the Tammy one. Those rims are 1-2 inch smaller than the Hasegawa's, so they are perfect to become front wheels. The only problem is that they are female and a little bit too wide, but it won't be to hard to modify them into decent front rims.

[Tamar]

Hello Stijn, look what I found, and you know I found it......, google........ just typed in Joest 962c and the 5th listing was. http://www.infoscourse.org/modules.p...erie&gal_id=32
Ok not directly, Iwas first directed to the 1990 gallery, but any gallery site that contains good pictures of Le Mans has some of the "pesage" or in plain english "the weight in" also know as the Technical inspection.
For car enthousiast this has always been the best time to get really close to the cars and inspect all their "inner secrets"




good luck and good progress
Tamar.

[stijnbamps1]

Thank's man! This is what I call good news. First of all, now I have an idea of what the car has to look like.
Second, I'm going to have to modify the curve of the back a little bit (not too much), maybe with some miliput and styrene here and there, but it seems that my first attempt in cutting the backside of the car wasn't that bad after all.

Cheers,


Stijn

[Tamar]

No...for something done without good ref pic's... not bad at all.

Looks like a good reference point for the final cut would be the position of the central wing supports. On the pics these mounts are clearly "outside" the body.

Mike mentioned in his Mulsanne article that the undertray was actually still "works" standard. Which makes me believe that the wing mounts were "standard" too. So the body work must have been shortened as far as central wingsupport slots.

Would make sence, one thing to tinker around with some bodywork, but changing the point where all those aerodynamic loads are transferred to the chassis.

I think that Reinhold would have been wise enough to trust Porsche's design there

[stijnbamps1]

Looks to me like it seems that the wing is attached to a custom made mount with warning/mist light. I'm working on a new wing with 2 parts, like Joest raced in Donington, so the rear wing is slightly different as in the last reference pic. There's no diagonal wing support in the back, plus this wing consists of one part, whereas the Donington version has a wing that is made of 2 separate parts. Also, the sides are rectangles. They're easier to make and look nicer IMHO. In any case, I don't think the attachment point on both cars would be different. So I'm going to try to make something similar.

As for the undertray, the middle section seems a bit longer. I will make some pics later today


Cheers,


Stijn

[stijnbamps1]

Okay,


I've made a decision today; the car is going to be built in the FAT sponsored car, like on the pics. I already have a car in the blue Blaupunkt livery so I want something else.
It's going to depict a Joest LM '91 car.


Cheers,


Stijn