Tag Archives: Ogilvie

Limited Fuel Unlimited Boost – Lotus Renault 98T #004

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The Lotus Renault 98T was a development of the 1985 Lotus Renault 97T Grand Prix Car designed by Gerard Ducarouge and Martin Ogilvie for Ayrton Senna and Johnny Dumfries to drive in the 1986 Grand Prix season.

Lotus Renault 98T, Autsport International, NEC, Birmingham

Note the small vertical “barge boards” mounted on the front suspension, a feature carried over from the Lotus Renault 97T that are still in evidence on today’s contemporary Grand Prix cars albeit mounted much closer to the side pod intakes.

Lotus Renault 98T, Autsport International, NEC, Birmingham

The main difference between the 1984 and 1985 Lotus Formula One challengers was that the FIA had mandated a 195 litre maximum fuel capacity which meant the new car could be built with a smaller and lower fuel tank.

Lotus Renault 98T, Autsport International, NEC, Birmingham

Elio de Angelis who had won one race in 1985 for Lotus and had been eclipsed by new team mate Ayrton Senna who won two races, moved to the Brabham team for 1986. Elio was replaced at Senna’s discretion by Johnny Dumfries a rookie who had dominated the British Formula Three Championship a Grand Prix feeder series in 1985.

Lotus Renault 98T, Autsport International, NEC, Birmingham

Despite running with a limited fuel allowance there were no limit’s on the amount of boost the turbo’s could run and after the introduction of pneumatic valve springs in the cylinder heads and a common rail injection system with water cooled intercoolers it was estimated that the Renault EF15 motors could produce upto 1300 hp at 5.5 bar boost for a qualifying run, though it transpires these figures could never be verified because there were no testing rigs that were calibrated for that kind of output.

Lotus Renault 98T, Autsport International, NEC, Birmingham

Other novel features of the Lotus 98T included two stage ride height adjustment and a six speed gearbox which was used exclusively by Dumfries.

Ayton Senna scored two more victories in Spain and Detroit along with 4 seconds and 2 thirds but although he scored 55 points 17 more than in 1985 he still finished 4th in the final championship as he had done the previous year. Johnny Dumfries meanwhile scored only 3 points and that heralded the end of his career as a Grand Prix Driver. He was replaced in by Satoru Nakajima backed by Honda who were to supply motor’s to Lotus for 1987. Despite scoring 13 points less in 1986 than they had in 1985 Lotus also finished 4th in the Constructors championship just as they had in 1985.

Thanks for joining me for this “Limited Fuel Unlimited” boost edition of “Gettin’ a li’l psycho on tyres” I hope you will join me again tomorrow. Don’t forget to come back now !

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Active Suspension – Lotus Ford T92 92/5

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For 1983 the Formula One regulations changed mandating flat bottoms between the front and rear axles, the intention was to outlaw ground effects which Lotus had successfully pioneered with it’s Lotus 79 and less successfully with it’s Lotus 80, 86 and 88 models, all the other teams on the Grand Prix grid had followed the Lotus teams lead with the result that cars were driving around corners so fast they were making the tracks they were driven on obsolete in terms of safety.

Lotus Ford 92, Goodwood FoS

Lotus managed to secure a supply of Renault Tubocharged V6 engines, for 1983, to replace the Ford Cosworth V8’s that the team had been using since the 1967 Dutch Grand Prix. These Renault motors were more powerful but also more fragile than the Cosworth’s, they were also in extremely short supply with Renault being able to supply only enough to keep Elio de Angelis on the grid for the first half of the 1983 season in a Lotus Renault Type 93T. Team mate Nigel Mansell had to make do with an interim the Ford Cosworth powered Lotus 92 featured today for the first half of 1983.

Lotus Ford 92, Silverstone Classic

The Lotus Renault 92 was devised by Colin Chapman and Martin Ogilvie, however Colin Chapman died in December 1982 and so never saw the car completed, 2 Type 92’s were built using the chassis tubs of the previous Lotus Type 91 featured last week. As well as being the last Ford Cosworth DFV powered Lotus design the Lotus 92 was also the first Formula One car to be fitted with computer managed hydraulic ‘active’ suspension. Nigel Mansell tested the system but did not like it so the idea was shelved pending further development. In 1992 Nigel won his only world championship with Williams in an actively suspended car.

Lotus Ford 92, Silverstone Classic

Perhaps unsurprisingly without their energetic leader Lotus floundered in 1983 the Renault powered Lotus 93T recorded a best 9th place with Elio at the wheel and Nigel managed a best 6th place finish at the 1983 Detroit Grand Prix in the Cosworth powered Lotus 92. A decision was taken in June 1983 to employ the recently sacked ALFA Romeo designer Gerard Ducarouge to design a third all new car for 1983.

Lotus Ford 92, Silverstone Classic

In six weeks Ducarouge managed to design and deliver two new Lotus Renault T94’s and set in motion a return to winning ways for Team Lotus. The Lotus T92 recorded just 9 starts one for de Angelis in Brazil at the beginning of the season where he was disqualified for starting the race in the Cosworth powered car in which he had not set a qualifying time, after his Renault powered 93T broke down on the warm up lap and 8 starts for Mansell who along side his 6th place finish in Detroit recorded three 12th place finishes and four retirements, which was three more finishes than the Lotus Renault 93 T managed.

Lotus Ford 92, Silverstone Classic

The first photo show’s Mercedes Benz GP reserve driver Brendon Hartley at last years Goodwood Festival of Speed and the third show’s 92/5’s previous owner Kiwi Roger Wills at the wheel during the 2011 Silverstone Classic meeting.

My thanks to Roger for clarifying Brendon Hartley’s identity.

Thanks for joining me on this “Active Suspension” edition of “Gettin’ a li’l psycho on tyres”, I hope you will join me again tomorrow. Don’t forget to come back now !

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Chassis or Aerodynamic Aid – Lotus Ford 88

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The Lotus 88 was a development from the ideas tested with the twin chassis Lotus 86. It differed, and was developed, in two crucial respects from the Lotus 86 it was designed to run with out skirts to seal the flow of air and would meet the 6 cm minimum ride height mandated by rules around late in 1980 for the 1981 season.

By having a secondary independently sprung chassis Lotus hoped to avoid the need to run their car with solid suspension which aided the road holding of ground effects pioneered by the Lotus Ford 79 which were sucked to the road surface as they moved through the air.

Lotus Ford 88B, Goodwood Festival of Speed

Gordon Murray designer at Brabham also came up with a solution to the 6 cm ride height rule which involved using hydraulic rams to raise the car above the minimum ride height in the pits, the only place the measurement could be checked, and lowering the ride height out once out on the track. This left the Brabham running effectively solid suspension once out of pit road.

All of the teams protested that the second Lotus chassis was in fact an independently aerodynamic aid and eventually the ruling body changed it’s mind having accepted the idea of a twin chassis car before the season started.

Lotus Ford 88B, Goodwood Festival of Speed

As a consequence after being protested during practice for the the United States West, Brazilian and British Grand Prix Lotus withdrew the 88 bodies with out ever having raced and used the more conventional Lotus 87 which used inner Lotus 88 chassis but with conventional side pods to generate ground effect and a similar hydraulic ram system for the suspension as used by Brabham.

Colin Chapman is said to have been disappointed that the twin chassis Formula One cars developed with Peter Wright, Tony Rudd and Martin Ogilvie were never allowed to compete believing that Formula One was supposed to be a proving ground for new innovation.

Thanks for joining me on this “Chassis or Aerodynamic Aid” edition of “Gettin’ a li’l psycho on tyres”, I hope you will join me again tomorrow. Don’t for get to come back now !

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Torrey Canyon – Lotus Ford T86

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On March 18th 1967 Shipmaster Pastrengo Rugiati elected to take his charge the 974 ft Torrey Canyon carrying 120,000 tons of crude oil on a disastrous short cut between the Scilly Isles and the Cornish mainland on his way to Milford Haven and ended up causing the worlds largest ship wreck when the boat grounded on the Seven Stones Reef. As the consequent environmental disaster unfolded the ship was bombed sending it 98ft below and the oil spill was repeatedly bombed in a vain effort to keep the oil off the beached of England, France and surrounding islands.

In 1969 Peter Wright was working on the ground breaking BRM P142 which would have introduced aerodynamically induced ground effects to racing car design when John Surtees joined BRM and insisted on opting for a conservative approach and developing the existing BRM P138 and P139 chassis with which Big John scored a season best 3rd place driving the P 139 at the 1969 US Grand Prix before quitting BRM to start his own team.

Peter left BRM and some years later started work for Technocraft to develop a vacuum assisted resin injection composite process which was to be used for the manufacture of body shells for the Lotus Elite, Eclat and Esprit road cars and Colin Chapman’s boat companies.

After the failure of the Lotus 76 in 1975 Colin Chapman asked another ex BRM employee Tony Rudd, now group engineering director at Lotus, to re-think how a Formula One car might be made to make proper use of the front tyres.

Rudd drafted his former colleague Peter Wright in to run the wind tunnel “in his spare time” after his commitments at Technocraft. The fruit of this collaboration was the successful Lotus 78 and world championship winning Lotus 79.

Lotus Ford 86, Goodwood Festival of Speed

The team were not so lucky with the Lotus 80, from which they took a step back with the Lotus 81 before regrouping with their next innovation the twin chassis Lotus 86 seen here.

What Peter had found out was that the Lotus 80 and to a lesser extent the Lotus 81 were suffering from aero flutter causing the cars to porpoise as a result of having springs that were too soft for the aerodynamic loads being put through the wheels and suspension.

By having a twin chassis Peter hoped to use a conventional monocoque chassis in which the driver sat and a separate independently sprung ground effect chassis attached to the first at the outboard ends of the lower suspension. The suspension for the outer ground effect chassis was much stiffer than for the inner monocoque chassis and as a result in theory should not be quite so sensitive to flutter or likely to porpoise.

In order for the car to work not only would the science have to be proven but the rule book scrutinised to ensure the car remained legal. By having the outer ground effect chassis suspended from the bottom suspension links using very stiff rubber bump stops the criteria for having all parts of the car with an aerodynamic influence entirely sprung, was met.

To check the science the team took a 1980 Lotus 81 added a spacer between the engine and the fuel tank through which the central cross member of the outer chassis would pass, made provision for the front cross member of the outer chassis to pass under the driver legs and had had the third rear cross member of the outer chassis pass over the gearbox.

The weight of the outer chassis was kept low using the in house developed carbon fibre process that Peter had been developing for the Lotus road cars and Champman’s boats.

Lotus Ford 86, Goodwood Festival of Speed

Amid much secrecy the Lotus 86 was built and then taken to Jarama for a private test, thanks to the motors heavily revised oil pumps, that were required by the second chassis, a lot of oil was spilled, hence the Torrey Canyon nick name for the car.

Once the leaks had been fixed the Lotus 86 proved that the aerodynamic outer chassis worked providing plenty of down force while the inner monocoque chassis, in which the driver sat, remained free of the porpoising effect that made the car difficult to control.

Upon completion of the test the Lotus 86 which was never subsequently raced was put aside and work started on the Lotus 88 using the same principles.

Thanks for joining me on this “Torry Canyon” edition of “Gettin’ a li’l psycho on tyres” I hope you will join me again tomorrow for a look at an old Rolls Royce. Don’t forget to come back now !

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Mario & Ronnie Show – Lotus Ford 79 #79/2 & #79/3

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John Player Team Lotus hit the track running in 1978 with Mario Andretti winning the opening race of the season in Argentina and his team mate Ronnie Peterson winning the third race of the season after a thrilling last couple of laps in South Africa. Both of these victories were achieved with the previous seasons Lotus Ford 78 ‘wing car design’ for 1978 Colin Chapman and his engineers came up with something even more refined in the shape of today’s featured car the ‘ground effect’ Lotus Ford 79.

Lotus Ford 79, Goodwood, Festival of Speed

The Mario Andretti first raced a Lotus 79 in the non championship International Trophy race at Silverstone a race well remembered because the front row qualifiers Ronnie Peterson and Niki Lauda both spun of on the warm up lap leaving Andretti and James Hunt to start at the front of the grid despite qualifying 3rd and 4th. Andretti only lasted two laps before he spun out with Hunt spinning out one lap earlier at the same spot.

Lotus Ford 79, Goodwood, Festival of Speed

However for the Belgium Grand Prix there were no mistakes Mario qualified on pole and won, driving I believe from Ronnie who started 7th in the older Lotus Ford 78. At the Spanish Grand Prix Mario was I believe given the #79/3 seen above while Ronnie took over Mario’s Belgium winning #79/2 seen below. Mario qualified on pole and Ronnie 2nd and that is how the Spanish Grand Prix finished.

Lotus Ford 79, Goodwood, Festival of Speed

Mario retired from the Swedish Grand Prix after qualifying on pole leaving Ronnie to finish 3rd behind the controversial Brabham fan cars of Lauda and Watson. Bernie Ecclestone chose to withdraw the Brabham BT46 fan cars after just one race. At the following French Grand Prix Mario qualified 2nd and Ronnie 5th, however they finished 1st and 2nd respectively for the 3rd time in the 1978 season.

Lotus Ford 79, Goodwood, Festival of Speed

For the British Grand Prix it was Ronnie and pole and Mario next to him but both cars retired. In Germany Mario qualified on pole with Ronnie sat next to him on the grid and by now unsurprisingly that is how they finished the race. In Austria Ronnie was again on pole with Mario starting second however Mario retired leaving Ronnie to take an unchallenged win which would prove to be his last.

Lotus Ford 79, Goodwood, Festival of Speed

At the Dutch Grand Prix Mario qualified on pole in #79/3 with Ronnie beside him in #79/2 and the pair duly took their fifth and final 1-2 result of the season. This would prove to be Mario’s last Grand Prix win and indeed the last for any American driver and Ronnie’s last ever finish too. Ronnie crashed #79/2 during practice for the Italian GP and started the race from fifth in an older Lotus 78 while Andretti started from pole in the latest #79/4. Ronnie was involved in a start line accident which broke his legs, unfortunately during the night bone marrow from his injuries got into his blood stream and he died the following morning. The race was restarted and a subdued Mario finished sixth which was enough to claim the championship, but in truth Mario was far more concerned for Ronnie with whom he had been good friends since there time as team mates driving Ferrari sports cars in the early 1970’s. Ronnie for the second time in his career finished second in the World Drivers Championship.

Lotus Ford 79, Goodwood, Festival of Speed

The success of the Lotus 79 was largely due to what was happening to the airflow beneath the bodywork, by building the monocoque just wide enough to hold the driver with fuel tank behind him and the motor behind that, Colin Chapman and his engineers Peter Wright, Geoff Aldridge, Martin Ogilvie and Tony Rudd used the side pods to create venturi by using a low wide neck at the front entrance to the side pods and tall wide exit, with side skirts sealing airflow under the car. When the car was moving air was guided into a partial vacuum created between the venturi side pods under surface and the surface of the road and this had the effect of sucking the car to road which allowed the car to negotiate corners at higher speeds than their competitors, most of whom had still not got to grips with the wing car aerodynamics advanced by the previous years Lotus 78.

For the last two races of the 1979 season perennial Formula One under achiever Jean Pierre Jarrier joined Mario in the team Mario qualified on pole in the USA with J-PJ 8th but neither car finished in the US Grand Prix. The final race of the season was held in Canada where Mario could only qualify 9th and Jean Pierre sat on pole. During the race Jean Pierre looked set for a win until he retired with an oil leak.

Mario finished tenth. The Lotus 79’s were set to be replaced by even more radical Lotus 80’s in 1979 but everything did not go to plan and so the 79’s were pressed into service again for most of the season but were out classed by their competitors who were getting to grips with ground effects aerodynamics.

A little post script courtesy Barry Boor, Mario Andretti was invited to drive the inauguration lap of the next home of the United States Grand Prix at Circuit of the America’s on October 21st, the car he drove was naturally a Lotus Ford 79 with which he won his world Championship, you can see how he got on in this linked youtube clip.

Thanks for joining me on this “Mario & Ronnie Show” edition of “Gettin’ a li’l psycho on tyres, I hope you will join me again tomorrow. Don’t forget to come back now !

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Original Wing Car – Lotus Ford 78 #78/R2

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After the mixed fortunes of the Lotus 76 with it’s twin wings and electric clutch and the Lotus 77 with it’s fully adjustable suspension Colin Chapman introduced an aerodynamic innovation for the Lotus 78 featured today.

Lotus Ford 78, National Motor Museum, Beaulieu

Like the ’77 the Lotus 78 was built around a narrow monocoque with an oil radiator in the nose,

Lotus Ford 78, National Motor Museum, Beaulieu

but with much larger sidepods than any Grand Prix car seen before.

Lotus Ford 78, National Motor Museum, Beaulieu

The front wings were used, in conjunction with the rear wing, to trim the aerodynamic balance of the car.

Lotus Ford 78, National Motor Museum, Beaulieu

Using an idea first modeled at BRM by Tony Rudd and Peter Wright the side pods closely resembled the upturned inner wing of a de Havilland Mosquito which Chapman had studied and written a detailed account of.

Lotus Ford 78, National Motor Museum, Beaulieu

Tony Rudd and Peter Wright joined Ralph Bellamy and Martin Ogilvie at Lotus to design the car and its side pods which produced prodigious down force to increase the speed at which it could go around corners without loosing grip.

While conducting wind tunnel tests for the Lotus 78 design at Imperial College London Peter Wright found that as predicted by Bernoulli’s principle of fluid dynamics which states that the flow speed of an ideal fluid with no friction will increase simultaneously with a decrease in pressure. Meaning in the case of the Lotus 78 the faster it went the more down force was generated by the side pods and so the better the car stuck to the road.

Lotus Ford 78, National Motor Museum, Beaulieu

The Lotus 78’s, known as John Player Special III’s by Lotus and their sponsors, were ready to race midway through 1976, but Chapman wisely vetoed their use until 1977 so as not to give rival teams the chance to figure out what Chapman and his team had come up with and copy during the off season.

Lotus Ford 78, National Motor Museum, Beaulieu

Starting the 1977 season Lotus had a huge advantage with the 78’s affording Mario Andretti 5 victories and his team mate Gunnar Nilsson with one more. However the unreliability of the Nicholson McLaren built motors played into the hands of Niki Lauda who, having more or less fully recovered from his near fatal accident in 1976, took only three victories and a string of podium places to claim the championship.

The car seen here at the National Motor Museum, Beaulieu is chassis #78/R2 which Mario Andretti used to start the 1977 season before it was entrusted to Gunnar Nilsson who won the Belgian Grand Prix driving it. In 1978 before the even more radical Lotus 79 was introduced, Lotus returnee, Ronnie Peterson drove the car and snatched a thrilling victory with one lap to go in South Africa.

Mexican Hector Rebaque acquired the car at the end of 1978 season and used it along Lotus 78/R1 which he had been using since the beginning of the 1978 season.

Sadly Ronnie Peterson lost his life after an accident at the start of the 1978 Italian GP where he was driving the back up Lotus #78/R3.

Thanks for joining me on this “Original Wing Car” edition of “Gettin’ a li’l psycho on tyres”, I hope you will join me again tomorrow when, thanks to some photographs from Geoffrey Horton, I’ll be looking at some of the vehicles in attendance at the Marin Samoma Concour’s d’Elegance. Don’t forget to come back now !

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