It is recognised that the F1 class may appeal to modellers and provides an opportunity for modelling that other classes may not.

Guiding principle- all custom chassis builds must be based on the scale dimensions and appearance of a real world F1 car including body, wings and all visible components. It is recognised that there may be some compromises necessary because it is a model RC car and those compromises are likely to be similar to those present on many commercial model RC F1 cars (for example that the spur gear and pinion is visible).

Custom 1:10 scale F1 Chassis may be approved as legal provided the following minimum requirements are met. Approval must be applied for and is not automatic:

1. All references to commercial F1 parts in these rules refers to parts for 1:10 scale F1 models.
2. All pieces of the chassis including main chassis, top deck and rear pod plate must be custom made (because these rules are for modellers and not for racers trying to simply merge the best parts of various commercial chassis).
3. Any parts for any commercially available F1 car may be attached to the custom chassis. You may also custom make any or all parts except where these rules state otherwise. Commercial parts not manufactured for F1 chassis are not allowed unless a suitable part is not made for an F1 car in which case a commercial part for a non-F1 RC car may be used (keep a list of any such parts as they must be disclosed when seeking approval for the custom chassis).
4. Cars must meet all technical regulations commercially built cars must comply with (refer to the main rules).
5. Chassis must be fitted with a commercially available F1 body and wings or a custom made body and wings based on the scale dimensions of a real world F1 body and wings (of any time period).
6. The front wing may not be wider than the width of the front tyres. The rear wing must not be wider than the width of the rear tyres.
7. No part of the chassis may be wider than the widest part of the body.
8. The car must be safe for marshals to handle with no sharp edges.
9. The front wing must be made of plastic, lexan or similar pliable material so that it will not cause injury should the car hit a person.
10. Roll over posts are not allowed and nothing must extend above the body except for an aerial.
11. The bottom of the chassis must be smooth and must not damage the racing surface or track barriers should it touch them.
12. Dampers (shock absorbers) are allowed for any wheel but must fit wholly under the body and may not be visible when the body is on the car (unless they were visible on the real world F1 car on which the design is based).
13. The front arm pivot points (where the front arms attach to the chassis) must be hidden by the body shell.
14. Length (measured from the front edge of the front wing to the rear edge of the rear wing) must be between 400mm - 440mm.
15. Height from the ground to the highest part of the model (body shell or rear wing) may not exceed 130mm.
16. Maximum width - refer to Rule 5 in the main rules.
17. The car ready to run may not weigh more than 1,600 grams. Minimum weight refer to Rule 6 in the main rules.
18. Custom made wheels / tyres are not allowed.

Compliance with the above rules does not automatically allow the car to compete at club level or at events that run the National F1 Rules, approval must be requested and granted. There is no automatic right to run a Custom Chassis.

Approval should always be sought from the club where you wish to race. If you wish to build and race a chassis at more than one club then also contact RC Formula1 (This email address is being protected from spambots. You need JavaScript enabled to view it.) and we will review your design and if we feel it meets the spirit and letter of the rules then we will provide you with a letter stating this which you can show to the club at which you wish to race. We recommend opening discussions before starting work on your build.

This rule is designed for enthusiasts who wish to make their own parts for the fun of the build. It is not meant for those seeking an edge over the competition.