Suspension System Project + technical drawings FF
Good morning guys,
I am Pol and I am a 4th year mechanical enginieering student from Spain, I am new to this forum as I've seen it is the best place to keep informed about Formula Ford cars.
Right now I am starting my final degree project which consists on the Design and Optimization of a Formula Ford suspension system.
I have a problem which is that as I am designing a suspension system withhout a reference chassis, I don't really know which dimensiones or chassis values take.
I have two options:
- Designing a suspension system which can be fitted in a big group of cars (imagining I am an independent supplier of suspension system).
- Designing a suspension system designed for a specifical car with a poor performance (I have been told that 84 Van Diemen and 85 Reynard are pretty bad cars) and improved the suspension they have.
I would like to get some advice from you, if possible, on chosing one of the 2 options and telling me models of car with bad performance based on your experience and if it's interesting or hypothetically feasible buying a new set of suspensions which improves their car.
The other main problem derived from that debate is obtaining technical drawing of some Formula Ford cars (if you can tell me some poor performances cars I would like to have those drawings) in order to design the suspension system within the dimensions. I would like to get some information to where or how to find them and if someone can provide me them.
From what I have seen, this is an incredible forum and I would love to receive first-hand help from you, any help will be welcomed and recognized in my final project report.
Thank you.
Weight distribution anda Gravity centre
Hello guys, thank you all for sharing your knowledge un this thread.
While I am studying the tire behaviour (I asume Avon Tyres are the best tyres to analyse) I would like to ask you some help on locating the Center of Gravity of a standard car. I have found some drawing without dimensions nor an actual complete list of all the previsible components of a FF car that I should take into account in this early stage.
It could be really helpful to have a guideline of the components to take in count, so i can know their weight and position.
Thank you as always, Pol
Optimum Weight Transfer to Outside Tires
Quote:
Originally Posted by
S Lathrop
The wider the track, the less weight is transferred from the inside tires to the outside tires as the car corners. Even though you increase the load carrying capability of the outside tires from the weight transfer you loose more from the inside tires than you gain on the outside tires.
It seems that track width is used to or can be used to control tire temperature and there would be an optimum track width based on tire hardness and track temperature. Would a formula car with hard tires be better off with a narrower track to get the tires up to temperature?
Datalogging recorded data request
Quote:
Originally Posted by
S Lathrop
One approach to you design study would be to find some one who has a data logging system on their car. A system that had accurate suspension position sensors. With that data, the data for the tires they were using and a good model of the suspension system, you would be in good shape to do the study you are thinking about. There are a lot of racers who will have all the data you are going to need.
Good luck.
Hi Lathrop,
Thank you for your proposal.
I see your point and maybe It IS a good start to have some usual data parameters.
It would be awesome if someone is open to share his recorded data in order to help me finding some parameters, like usual camber, roll centre, trail... Values to have as a benchmark.
I have no problem keeping this information to myself and not making it public. I can sign any confidentiality paper if you want.
Any help will be appreciated.
I don't know if I should ask here or in another thread, or if I can look for that in another place.
I leave my e-mail here: polgarcia26@gmail.com
As always, Thank you a lot for your collaboration.
Suspension Analysis Paper
Pol,
What about comparing the suspension design of a 84 VD vs 85 VD and theorize why the 85 is better than the other or maybe not? The problem I see is obtaining the suspension geometry and there are a ton of variables. The other is just to analyze the 84 VD and using the data theorize why it didn't handle well. Then you might be able to make changes that would make the 84 VD handle better. You might also need some driver feedback on the 84 VD handling deficiencies.
If you want to do a CFD study, there are 3 articles by a Simon McBeth (UK) that performed wind tunnel testing of a Swift SC92 and a more modern Spectrum. He made small modifications to the SC92 car and meticulously measured the results. You could compare your data with his.
Larry
Shock absorber info request
Hello everyone, it's Pol.
Thank you for sharing all your thoughts on the project and helping me with the development.
I have done some progress and at the moment I am optimizing the kinematics (I am asking some drivers for feedback) and my next step is to choice a pair of shock absorbers for front and rear suspensions.
I would like to know more about what brands are normally used for these cars and which of them offer more information, specifically dyno plots, for free, as I haven't seen much info of that. I've seen shocks of Ohlins, Penske...
Any help will be appreciated, thank you.