Single Seater Rear Tie Rod Query

[P34 lurv]

Apologies for a basic question: can anyone confirm the function of a rear tie rod on a single seater, such as a F3.

Thanks

[alexbarwell]

Might be misunderstanding the question slightly, but the upper and lower wishbones are mainly arranged to handle the vertical wheel travel and the complex arc described by the wheel, but the attachment of the hub/wheel carrier does not locate the hub in rotation about the z-axis (normal notation) then the wheel could flap around the same as a broken track rod end - bit undesirable. Other than locating the wheel in the desired direction, toe in/out can be applied to suit.

Or did you not mean it in such a fundamental way?

[DaveKillens]

I believe this is the type of suspension arraingement you are referring to. Although the chassis may not be for a formula car, the suspension components are.
There are two tie rods (the two long straight, white, rods) per corner, an upper one and lower. Each locates the suspension uprights relative to the chassis.

[xpensive]

Those tie-rods in your elegant picture DaveK, should be there to handle tyre-loads in their own very direction, acceleration and breaking, correct?

As I can recall, very common on F1 cars in the 70's.

[DaveKillens]

Those tie-rods in your elegant picture DaveK, should be there to handle tyre-loads in their own very direction, acceleration and breaking, correct?

As I can recall, very common on F1 cars in the 70's.

Fundamentally, correct. These tie rods do fix the location of the uprights as far as the fore and aft directions.

OT, I wish I could draw like that, my stick men are unreconizable and ugly .. lol

[P34 lurv]

Many thanks to all - greatly appreciated

[DaveKillens]

P34 lurv, most of us are here to learn, myself included.

I do suggest you purchase a good book on racing cars, because the topic is so wondeful to learn about.

[xpensive]

While at the same time, some of us are hopeless know-it-alls, myself included! *LoL*

[Jersey Tom]

It's there to control the steering of the tire, just like the front tie rods.

[P34 lurv]

I do suggest you purchase a good book on racing cars

Do anyone have a recommendation?

ps why is an ackerman arm called an ackerman arm - and I know what it does!

[Carlos]

The seminal Software and Books Thread started by Manchild.
viewtopic.php?t=1507

The Engineering Resource Thread
viewtopic.php?f=3&t=4813

[DaveKillens]

ps why is an ackerman arm called an ackerman arm - and I know what it does!

Best I could find...
http://members.cox.net/bdfelice/Ackerman/ackerman.htm

[Jersey Tom]

Never heard of an Ackermann arm before.

[P34 lurv]

Great link - good old Mr Ackerman - what a good use of doors and bits of string!