cputnam
10-06-2008, 03:38 PM
Hey everybody
I'm a senior working with WPI's team. due to the way the previous FSAE teams here were structured, we have very little information to work off of, especially considering few of them have made it to competition. luckily thats changing now.
Since we are starting fresh this year, i'd like to get some feedback on our preliminary suspension design. i've studied the other threasd on this subject from the korean team so i've tried to cover topics already discussed there.
heres some specs first
Proposed Wheel base: 60 inch
Front track width: 48 inch
Rear Track width: 46 inch
Front suspension: SLA
Proposed Rear suspension: 4 link with solid axle
Wheel Size: 13 inch
Tire Radius: 20 inch
Ground clearance: >1.25 at full bounce
Steering geometry has not yet been added
here are the front suspension drawings so far.
Static
http://i486.photobucket.com/albums/rr222/cputnam58/suspension%20design/suspv2staticdrawing.jpg
1.25 inch bounce
http://i486.photobucket.com/albums/rr222/cputnam58/suspension%20design/suspv2125inchbounce.jpg
1.25 inch rebound
http://i486.photobucket.com/albums/rr222/cputnam58/suspension%20design/suspv2125inchrebound.jpg
2 degrees roll
http://i486.photobucket.com/albums/rr222/cputnam58/suspension%20design/suspv22degreerolldrawing.jpg
I put this together last night so its by no means final. just looking to get some ideas on specific things to focus on as we progress through iterations.
With the design we are going for, we are attempting something light in the rear with the ability to lift the inside rear tire in a turn. this is the main reason for the 2 inch difference in track width. One idea we are also pursuing to further this is to set up the front suspension for anti-squat, which could help the front end dive in a turn and further un-weight the rear. any other suggestions as to how to increase the ability to lift the rear tires?
Thanks for the help
I'm a senior working with WPI's team. due to the way the previous FSAE teams here were structured, we have very little information to work off of, especially considering few of them have made it to competition. luckily thats changing now.
Since we are starting fresh this year, i'd like to get some feedback on our preliminary suspension design. i've studied the other threasd on this subject from the korean team so i've tried to cover topics already discussed there.
heres some specs first
Proposed Wheel base: 60 inch
Front track width: 48 inch
Rear Track width: 46 inch
Front suspension: SLA
Proposed Rear suspension: 4 link with solid axle
Wheel Size: 13 inch
Tire Radius: 20 inch
Ground clearance: >1.25 at full bounce
Steering geometry has not yet been added
here are the front suspension drawings so far.
Static
http://i486.photobucket.com/albums/rr222/cputnam58/suspension%20design/suspv2staticdrawing.jpg
1.25 inch bounce
http://i486.photobucket.com/albums/rr222/cputnam58/suspension%20design/suspv2125inchbounce.jpg
1.25 inch rebound
http://i486.photobucket.com/albums/rr222/cputnam58/suspension%20design/suspv2125inchrebound.jpg
2 degrees roll
http://i486.photobucket.com/albums/rr222/cputnam58/suspension%20design/suspv22degreerolldrawing.jpg
I put this together last night so its by no means final. just looking to get some ideas on specific things to focus on as we progress through iterations.
With the design we are going for, we are attempting something light in the rear with the ability to lift the inside rear tire in a turn. this is the main reason for the 2 inch difference in track width. One idea we are also pursuing to further this is to set up the front suspension for anti-squat, which could help the front end dive in a turn and further un-weight the rear. any other suggestions as to how to increase the ability to lift the rear tires?
Thanks for the help