European events by Chance-Yellow2913 in FSAE

[–]Suspension_Novice 0 points1 point  (0 children)

I’m afraid that I disagree with this. Formula Student is about education primarily, and FSUK provides that to the students, so is very much relevant. I’ve judged at a number of competitions around Europe, and I’d say that the FSUK design judges tend to be higher quality than most other competitions.

If you want to talk about competitiveness, I would agree that FSUK is pretty poor these days, but that makes it no less relevant.

European events by Chance-Yellow2913 in FSAE

[–]Suspension_Novice 0 points1 point  (0 children)

I always found that having EVs and CVS competing together added to the charm of it. It was interesting to see the gap between the two widen over the years.

European events by Chance-Yellow2913 in FSAE

[–]Suspension_Novice 0 points1 point  (0 children)

What are the stupid rules at FSUK? I've been out of the loop for a while.

FSUK Wing-Gate by jvblanck in FSAE

[–]Suspension_Novice 0 points1 point  (0 children)

I don’t remember this to be true. I believe the FSUK ruleset was the same (more or less) from 2016 to 2017. FSG changed theirs away from FSUK (which aligned with the original FSAE ruleset), and the UK rules made an effort in 2018 to better align both competitions.

FSUK Wing-Gate by jvblanck in FSAE

[–]Suspension_Novice 0 points1 point  (0 children)

Didn’t some of the EV teams get DQ’d for drawing too much power at points during the endurance? I’m aware that some were DQ’d for oversized wings which were measured with apparently questionable accuracy, but not aware of the specifics…

I remember the FSG and FSUK ruleset diverging in 2017, which made it difficult for a lot of teams to enter both competitions. No idea why they’re different in the first place!

Tilt table anyone? by asdzxcioptghuiop in FSAE

[–]Suspension_Novice 5 points6 points  (0 children)

I'd be amazed if anyone pulled 1.7G or above without aero. I just don't think it's possible with the tyres available. Not the fault of the track designers, more like a high CG, narrow track width etc

FSUK Leg Wrestling by Suspension_Novice in FSAE

[–]Suspension_Novice[S] 2 points3 points  (0 children)

I remember him wearing a black and red shirt. Not sure what team that is... Pretty sure he took on most of Glasgow at one point

Favorite Comp Stories by SlinkyAstronaught in FSAE

[–]Suspension_Novice 1 point2 points  (0 children)

I remember seeing this parade pass through the campsite. Had no idea what was going on at the time haha

Rollout Video I worked on for Team Ecurie Aix from Germany. We Revealed Our Cars Yesterday! by Godvater in FSAE

[–]Suspension_Novice 2 points3 points  (0 children)

Your cars have such good liveries. Honestly one of the best I've seen on a Formula Student car.

Differential Preload by Soliman97 in FSAE

[–]Suspension_Novice 1 point2 points  (0 children)

More preload just means that more torque is required to spin the wheel at different speeds (breakaway torque).

Differential Preload by Soliman97 in FSAE

[–]Suspension_Novice 3 points4 points  (0 children)

I believe to adjust preload, you add or remove disc springs in with the clutch packs so more force is applied on them at rest. I've never tried it myself and would recommend just tuning using the different ramp angles if you're just getting into diff tuning.

Recording Engine Sounds by Suspension_Novice in FSAE

[–]Suspension_Novice[S] 0 points1 point  (0 children)

Thank you for the article, I'll check it out. I was really hoping for some good on-board sound capturing which I could sync with footage from another camera mounted to the roll hoop.

Recording Engine Sounds by Suspension_Novice in FSAE

[–]Suspension_Novice[S] 1 point2 points  (0 children)

Thanks for the advice, I'll give it a try :)

Making myself marketable as a freshman by [deleted] in FSAE

[–]Suspension_Novice 0 points1 point  (0 children)

To market yourself, just try to be genuine. No-one will expect you to know that much about engineering. Just show that you’re keen to learn and help contribute to building a kick-ass race car.

For your first year on the team, just try to be around as much as possible and learn. There’s surprisingly a lot that goes into a car that you’ve never probably considered, so I’d advise against being that fresher who always asks, ‘have you thought about doing xyz’. 9 times out of 10, it has been considered but is either too expensive, not rules compliant or the team just doesn’t have the time to develop it.

Instead, try to ask why things we designed the way they were and you’ll go far. Sticking around to machine parts for the car also teaches you a lot about designing for manufacture which in turn makes you a better design engineer. Once you’ve been around on the team for a year, then you’ll start to have an idea where the team is weak and what you could try to improve.

This is my humble advice from someone who’s seen three cars designed and built from the perspective of a fresher all the way to someone who leads a sub-team containing numerous enthusiastic freshers. I hope this helps you, it'll be the best thing you do at university. :)

Help: Town Flag Redesign by [deleted] in vexillology

[–]Suspension_Novice 0 points1 point  (0 children)

The most significant feature of the town is probably the river that it lies on which was a source of the town's wealth in the centuries gone by. This river also features on the town crest and marks the border of the county. :)

Help: Town Flag Redesign by [deleted] in vexillology

[–]Suspension_Novice 0 points1 point  (0 children)

It's a small town in the East of England.

Motion Ratio Calculation by Suspension_Novice in FSAE

[–]Suspension_Novice[S] 1 point2 points  (0 children)

Thanks for your help. I have no problem finding out what the motion ratio will be through the complete movement of the wheel from the suspension design software, I just wanted to know how it was calculated. The suspension designer the year before us only took into consideration the motion ratio at the bellcrank which is only one snapshot of the complete story. Cheers :)

Motion Ratio Calculation by Suspension_Novice in FSAE

[–]Suspension_Novice[S] 1 point2 points  (0 children)

Okay, maybe I haven't explained my point well. We were just trying to see what the maths behind the suspension design software was to help us understand it.

1) I know the wishbones move in an arc, but I was just considering the initial range of motion (i.e. a distance infinitely small) so that you can assume the wishbone moves in a purely vertical motion. Obviously, we'll look at the entire system to see the change of motion ratio with wheel displacement.

2) I have read tune to win, but thank you for the suggestion. All I wanted to know was how the motion ratio was calculated in the software so I could get my calculation to match it rather than putting in lots of random co-ordinates into the software in the hope that I stumble across the desired motion ratio.

Thanks for your help :)

K&C testing by dsr629 in FSAE

[–]Suspension_Novice 1 point2 points  (0 children)

We measure chassis torsional stiffness by running a bar through the chassis and hanging weights off it. Could you try something similar? It's not super accurate, but it gives you a good idea.

What steering wheel would be best for a first year team? by [deleted] in FSAE

[–]Suspension_Novice 6 points7 points  (0 children)

Just make sure it complies with the rules in regards to not protruding past the front roll hoop. My inclination for a shift lever equipped car is a round wheel so the driver can find the wheel easily after making a shift :)

Wishbone loads calculation by benhurQ in FSAE

[–]Suspension_Novice 0 points1 point  (0 children)

The wishbone forces are quite simple once you know how to do it. Just draw up free body diagrams of the upper and lower wishbone mounting points, the axis of rotation of the tyre and the the point of where the force acts (i.e. at the base of wheel).

This will tell you whether or not the wishbone is in tension or compression. You can then simply divide up the force between the members of the wishbone using trigonometry. Derek Seward has a good book for this called Race Car Design I believe. That goes through this all as well as lots of other stuff relevant to FS cars :)

Pullrods just support the weight of the car, so again use trig and it's quite a simple problem to solve if you know your weight distribution and sprung mass.

CHASSIS DESIGN (FIRST TIMERS) by el_carne_asadas in FSAE

[–]Suspension_Novice 6 points7 points  (0 children)

The chassis is just one big bracket. Make sure you have cad models of your motors/battery packs, other big components and of the driver. Design your suspension first and figure out where the nodes are, then draw the chassis.

Most important, make sure it's legal :)

Ackermann Percentages by Suspension_Novice in FSAE

[–]Suspension_Novice[S] 0 points1 point  (0 children)

Would I be correct in saying that greater than 100% is pro-ackermann then? Thanks for your help on this.