When I reach 60mph I can feel the front of the car "lift" and it gets very "light" and then when I reach 90mph I can actually see
the front of the car rise up in the air. As you can imagine this is quite interesting. So how do I go about stopping this? Is it because the front is
very light? The shape of the front wings? The suspension set up? Or all of the above?
Smudger
Tree Rats - I hate em!
stick a slab in the front
Give it a bit less elevator... you are building a plane, right?
Seriously, what are you building? then maybe we can held. If it's a Locost sort of car, get rid of any big, body mounted fenders at the
front.
What are your front suspension settings? Toe? Camber? Caster?
Notorious for lift
Rescued attachment 21434.jpg
Sorry could`nt resist , is it one of these then?
Even BIGGER wings
[Edited on 23/12/04 by ReMan]
Rescued attachment mosq.jpg
He's building a Mosquito.
Mini powered middy. I had no idea that it would do 90!
You'll have to attach some gurney strips along the leading edge to break up the lift?
OMFG
When you are talking about that green car....it's probably a combination of a very light loaded front and very effective (in terms of lift! )
front wings.
It looks as those mud guards are shaped according the coordinates of a high lift glider wing airfoil and even the angle of attack looks good
Get rid of those front wings or one day they will brake off or glue some strips over the leading edge to disturbe airflow if you wonna keep them.
Put them in the front between the wheels. 
Rescued attachment solnmanh0068-7.jpg
The Mosquito is my daily driver. I use it to - from work 5 days a week. It does have "gull-wing" doors as well. Handy in winter (ish). Their
is no room in the front for bags of sand etc as fuel tank takes up quite a bit of room, hence no front rad. I was looking at changeing the front wings
to cycle wings (I sell Carbon Fibre cycle wings). I was looking at the totally flat underneath as a possible lift problem as well. I am looking into
getting different dampers and lower them as well, but it is still a problem with lift at speed.
For the interested. Got clocked at 108mph on a "private" road (M6) so it can shift
As for castor/camber Hmmm. Will be fitting HD Tie Bars all round and 1.5 Neg Camber Bottom arms up front. But what caster/camber for the rear?
Would a underbody diffuser work? If so what shape and how to fit?
Smudger
preventing air going under the car, or facilitating its exit at the rear (like the old f1 cars with the hugh fans!) will create low pressure under the
car. this will help it stick to the road. in the absence of a convenient wind tunnel, i would suggest trial and error. Ditch the front wings, make a
small dam to go under the front, and also see what weight could be moved forward (battery?).
how does the car handle? does it feel like the weight balance is too far back?
Make sure to "rake" the chassis so that the front end is lower than the back. That'll make your flat undertray work like a diffuser. If it's totally flat at rest, then those big wing fenders will be lifting the front at speed, which will then rake the car the wrong direction which will inevitably cause it to lift even more... and so on and so forth. Of course adding the air dam at the front will help this condition considerably.
quote:
Originally posted by smudgersmb
,
hence no front rad.
Smudger
The grill at the front is their for "show" and does not have any holes in it at all.
Their is no room at the front for anything to be moved. Its all taken up by Fuel Tank, Fuel Pump and horn.
What type of Air Dam? What style? How to make one?
Car feels VERY light when driving, this is due to the A Series being in the back and the previous owners never having set the car up properly.
I am going for 90mph (3.9 Final Drive) but it still needs to be contrable at that speed.
I remember the AUDI going flying at Le Mans not so long ago and dont want the same thing happening (on a smaller scale) to me
Smudger
The problem with cycle wings is:
1. Where to mount them?
2. I can't make the brackets so who can?
3. I sell CF cycle wings so who wants some
Smudger
No the real question is:
Whats your best price for a poor man?
quote:
Originally posted by smudgersmb
The problem with cycle wings is:
1. Where to mount them? Obviously above the wheel
2. I can't make the brackets.Why not?
3. I sell CF cycle wings so who wants some?Are they delivered with brackets?
Smudger
Cycle wings in CF showing weave (poor pic)
Rescued attachment Cycle Wing.JPG
Very nice looking wings indeed!
Best price for a poor man?
Smudger
