Thread: Automatic Spoiler - rise and unpack jsut like porche but with extras

oh sorry im just 7 y/o so your comenta is N/A, but if you relly prefer so I can post it in Russian

As to 100mph efficiency. Thats all depands on your angle of the wing. If you dont plan to travel more then 80 you can safly put say 14-18 degrees (but if you hit 100+ speeds you will feal that back of the car is pressed down to the ground) and if you go to say 135 (or more if you dont have governor) then you may brake strings or lover the car to the level of the ground and get lots of spartks =)

In another words speed + angle = derectly propostional to efficiency. Min speed though is 60mph. You can try yourself, get 40+ mph and put your nahs outside the window, make sure your fingers are close togather then play with different angle position, then go to ~60-80 mph and see the difference. (Airctaft take off speed is 60-80mpg. 60 for small propeler one, 80 for jets... or hmm well thats in should be in km/h, russian Mig29 takes of at 80Km/h with flaps extended)

http://www.aerospaceweb.org/question...ce/q0088.shtml

That's way faster than 80mph tempgp. You still sure they are effective at such slow speeds?

As to 100mph efficiency. Thats all depands on your angle of the wing. If you dont plan to travel more then 80 you can safly put say 14-18 degrees (but if you hit 100+ speeds you will feal that back of the car is pressed down to the ground) and if you go to say 135 (or more if you dont have governor) then you may brake strings or lover the car to the level of the ground and get lots of spartks =)

So you're saying that yes, wings at any reasonable angle are not effective below 100 mph?

On a side note, if your springs break before bottoming out, you need to get new springs. The average passenger car probably would require 600+lbs of force to bottom out on the suspension hard stops. Are you saying a normal sized aftermarket wing (eg not something sprint-car sized) puts down that much force at 135mph? Please tell us where you found this information. Your simulator does not take into account the aerodynamics of a car, only for freestanding wing shapes which is an entirely different ballgame. You as a self proclaimed aircraft engineer should understand this.

Originally Posted by Crinos

What the **** is a "Norwegian turn" ???
Just curious, since I'm a Norwegian myself....

I think he he means the Scandinavian Flick as used by the Rally car drivers,



Basically you turn away from the corner first then turn into the corner.

It helps getting the backend sliding out.

I use NASA wing simulator to calculate the lift waights. As to take off speeds i guees i was wrong, i meesed it up with turbine start speed.
The simulator only for wing itself, nothing else. But in general if you have trunk lower then your rear window then wair will get compressed and flow down (that it caused ai vacum behind the car on hifger speeds) so technically the air density should be the same as in aircraft.

Ok i recalculated all variables for 4x1 feet wing including the fact that wind will be coming fropm top of the windshield...

Speed: 80mph
Lift: -180lbs

Speed 135
Lift: -513

(if your springs handle 600lbs, i would not risk to put extra 500 lbs on them at that speed)

How how effective extra 180 pounds are for your driving that i have no idea. But thats extra friction for your tires so i would assume car will become less "slippery"

thats shape is no longer a flat eclips so to pull it out if the trunk i need to have chanber with opening door