Mary Stuart Porsche

[haul]

Mary Stuart, Carrera RSR,

(Vin 911 360 0588 R6 as written in books and race records)
as I learned today it was actually - see Hugh‘s entry #17 below -
VIN 911 360 0686 R7

Start Number 41
1000km Grand Prix de Spa
6.5.1973
Herbert Müller/Gijs van Lennep
5th overall, 63 Laps
|||||
found in the September 1973 Christophorus

[PMNorris]

Here's the full thread. Well worth reading end to end.. its been a long time in the making:

http://forums.pelicanparts.com/porsc...r-project.html

[sanders]

Cool...FYI when R7 was owned by Gregg it was in Brumos livery raced at Watkins Glen Can Am and 6 hour and when Rabaque owned it it was in Café Mexico/Viceroy livery raced at Le Mans. But with totally different long tail configuration.

[Cruisingnkali]

There is a gentleman in Japan who is producing and selling limited (fiberglass) sets which include rear fenders, deck lid, and rear bumper for approximately $9k.

[jaudette3]

Mary Stuart RSR Homage

I’ve been in touch with the owner of the one original Mary Stuart RSR in the world (the one in the Porsche museum is a replica) and he has graciously agreed to provide this builder with any information he might need for his build. This is going to be a top of the world homage car!

Cheers,
John

[michaelaiellosr]

This topic is an interesting one if you're interested in the Martini RSRs and from post 10 & 16 onward there's a bit of info on the Mary Stuart tail.
In short, during the season they found they needed more downforce than the ducktail could provide, so whereas they had the cobbled on metal side plates at the Targa Florio, this improved to the what's now called the Mary Stuart tail/collar for the Le Mans race and later races that season.
Together with the improved downforce on the rear, they also added a lower bit to the front spoiler to reduce lift and the flares where wider to increase the already huge 11" rear wheels to what I believe were 13" centre lock wheels. It reduced top speed but provided added downforce for faster cornering.

The #46 car (9113600686 / R7) was modified together with R6 (9113600588) Targa Florio winning car (#47 at Le Mans) as can be seen in the Teloche garage picture above.
The R6 car was in that look for a long time (when Kitchak owned the car) and only recently has been restored back in the earlier Targa Florio winning look with the side skirts.

I know that Zuffenhaus was doing a replica, in the end even using carbon for the Mary Stuart tail, and no doubt there will be more copies around.

It was probably understood by the factory and later analysis confirmed that the sugar scoop acted more as a spoiler, reducing lift, rather than adding any downforce. Technical aero knowledge at the time in its infancy, mechanics and "engineers" used the cut and try method . Not knowing what if any success this car had those responsible for it no doubt were willing to try anything to achieve some at the rear and did so at the expense of serious drag, maybe hoping that the trade off would work. Its strange why somebody would want to pay so much for homage to what is a curiosity , an oddity, as opposed to a racing legacy car.

[HughH]

The aero work designing the "Mary Stuart" tail (and associated deep chin spoiler) was actually done on R2 at the Stuttgart wind tunnel in JANUARY 1973 - months before it ever appeared on the race track (and even before the RSR cars were debuted at Daytona). So when they were at the Monza race (the first time that tail appeared) on April 25 1973 they had all the design parameter locked in but had never tested it in a race. As those Martini cars were mobile test beds they used it (as a last minute change to the configuration after practice during the race weekend) on both R6 and R8 which were forced to run as prototypes as Bonomelli had protested both Martini cars (on their revised rear suspension pick up points) forcing them to run in prototype class.

It was also used on 6 May at the Spa 1000kms on R7 (not R6 as Haul has posted above as the cars are wrongly identified in both books and the race records at the time but Singers notes from the time show it was really R7 - let alone that it was impossible to be at Spa at that weekend between it being at Monza just before and the Targa just after and looking slightly different with details such as rear vision mirrors etc not matching apart of course from the two completely different types of Mary Stuart tails) .

That design was carried over to the Targa Florio a couple of weeks later and then evolved further at Nurburgring and Le Mans that year.

[haul]

corrected my entry as Hugh has different infos on the car participating im
Spa....

but wondering:
VIN 911 360 0576 R5
Start numer 40 with Follmer / Jöst
10th overall
also did participate in Spa?
are these entries correct?

[JKH]

double vision r7

https://nypost.com/2019/07/20/vintag...-authenticity/

[patrick911]

Apologies for taking this off-topic somewhat, but Hugh, regarding:

(...) not R6 as Haul has posted above as the cars are wrongly identified in both books and the race records at the time but Singers notes from the time show it was really R7 - let alone that it was impossible to be at Spa at that weekend between it being at Monza just before and the Targa just after and looking slightly different with details such as rear vision mirrors etc not matching apart of course from the two completely different types of Mary Stuart tails) (...)

My notes, and what i shared in my #8 RSR build project post, indicate that R6 was at Spa the week before, as #40, with a yellow lip front spoiler, but without a collar/Mary Stuart tail, driven by Follmer & Joest. Are you saying that table is wrong?
(If so I'll change it because otherwise errors keep on reproduced - like I may have done inadvertently.)

EDIT: After Hugh confirmed that R6 was not in Spa in April - I've updated the corresponding table and post in my topic.

Cheers,
Patrick