Evad 4
  Taken at Holcombe Court, Holcombe Rogus, Devon - by kind permission of Mr. C. Fleedwood-Hesketh.
  pedal adjustment
  Pedal adjustment

The Imp Site


Formula 4 Racing Car

General Design Details

Class 1. Specification

The Car was developed to enable the club enthusiast to own and race a genuine single seater racing car.

The Car has a triangulated space frame with an alloy undertray, and centre section. The nose and tail sections being quickly detachable glass fibre panels. Removable padding in the upholstery of the reclining seat, and fully adjustable controls, enable a suitable driving position to be obtained. The rear engine is mounted in dural engine plates which are rigidly fixed in the chassis for added rigidity. Drive is by chain to a quick change rear axle sprocket, and then by rubber doughnuts to the wheels. Chain adjustment is obtained by rocking the centre drive unit. Suspension follows modern practice, and is fully adjustable, pivot points being rubber or nylon bushes and rose joints. Springing is by Armstrong coil spring damper units. An 11" hide-covered steering wheel controls the steering through a rack and pinion steering box. The braking system is made up of 7" alloy drum brakes, operated by twin balanced master cylinders. Fuel is contained in a tank behind the seat, and is pumped by either mechanical or pulse pump to the carburetlors.

Classes 2 and 3 cars follow the general specitication above, with changes in design to accommodate the extra power. Full specification for classes 2 and 3 may be obtained on request.


Technical Specification for Class 1

Wheelbase     72 in.
182-8 cm
Track   Front   44 in.
    Rear 42 in.
106.6 cm
Overall Length     100 in.
254 cm
Overall Height (to top of Roll Bar)     33 in.
83.8 cm
Ground Clearance     3½ in.
8.86 cm
Weight (Dry)     320 lbs.
120 kilos
Weight Distribution     45/55 Front/ Rear
Wheel Size     500 X 10  
145 X 10
Fuel Tank Capacity     1¾ gall.
7.95 litres


Class 1.   Chassis, with alloy wheels and Dunlop SP.41 tyres.
Less Engine / Gear Box  
  Chassis as above
complete with Merlin Rotary Valve Engine / Gear Box  
Class 2. Chassis,
with magnesium wheels.and Dunlop racing tyres
Class 3. Chassis as above £800
Engine prices for Classes 2 and 3 according to specification.  
Racing Car Trailer £40

All prices ex-works, delivery can be arranged at cost.

Component parts are available for the Home Constructor. List on request.

Cars are supplied in kit form for U.K. Sales.

Due to the Company's policy of constant development, the right is reserved, without notice, to amend the specification, and without the obligation to modify existing cars.

Sole Manufacturers


Telephone: GREENHAM 457


The Imp Site
   Imp Specials
      Evad 4, Formula 4 Racing Car
         Evad 4, Formula 4 Racing Car - the folder (this file)
         Evad 4, Formula 4 Racing Car - press release
         Evad 4, Formula 4 Racing Car - RAC regulations for F4


'évad 4' means 'season 4' in Hungarian
Evad is Dave spelt backwards

© Franka


Folder supplied by Robin Human, National Weekend 2011 (Bangor)