Performance question: Under chassis aero package....Is it worth it?
05-22-2009, 12:28 PM
#1
Performance question: Under chassis aero package....Is it worth it?
If someone made an under chassis aero package to fit a 1/10 scale sedan, would it help going into a corner by creating a "vacume" effect?
At the rear of the car a diffuser, and on each arm, a divice to creat vacume as the air passes under the arm. Lets say that it was to gain around 3 to 5% additional downforce at the tires, would it be worth it? The total weight would be less than 8 grams.
Would it bennefit the average club racer?
Who would it benneifit if anybody?
Would you buy it?
WOULD YOU LIKE TO SEE THIS?
any input is welcome, negative or positive.
At the rear of the car a diffuser, and on each arm, a divice to creat vacume as the air passes under the arm. Lets say that it was to gain around 3 to 5% additional downforce at the tires, would it be worth it? The total weight would be less than 8 grams.
Would it bennefit the average club racer?
Who would it benneifit if anybody?
Would you buy it?
WOULD YOU LIKE TO SEE THIS?
any input is welcome, negative or positive.
05-22-2009, 01:09 PM
#3
I for one would love to see you what you got. I always thought that aerodynamics should be next frontier to be exploited in RC racing. We have reached a point where chassis's are more advanced than the real counterpart, but bodies are still the same from 3 years ago, at least in sedans. I think all that is about to change. The latest crop of 1/8th scale bodies for example, are showing us that there is potential for even greater gains in performance... all from the art of aerodynamics. The idea of an carriage is something I personally have thought about quite a bit. I am glad that someone else have taken it to the next level. By all means, please show us what you've got so far. Thanks in advance.
05-22-2009, 01:12 PM
#4
With a basic wind tunnel (made from a large box of straws and some cardboard,) it gennerated 5gms of additional wieght to the front tires on each side and 11 grams of weight at about 45mph wind (based on stihl backpack blower ratings) on each side of the rear. More with a stronger air flow and less with less air flow. (tested both ways, with and without aero package. 3-5% increase in downforce. HAS NOT BEEN TESTED ON TRACK IN A RACE CONDITION.) So, does it work,? Hoping to do some track testing this weekend if the rain holds out in Tampa.
05-22-2009, 01:15 PM
#5
I for one would love to see you what you got. I always thought that aerodynamics should be next frontier to be exploited in RC racing. We have reached a point where chassis's are more advanced than the real counterpart, but bodies are still the same from 3 years ago, at least in sedans. I think all that is about to change. The latest crop of 1/8th scale bodies for example, are showing us that there is potential for even greater gains in performance... all from the art of aerodynamics. The idea of an carriage is something I personally have thought about quite a bit. I am glad that someone else have taken it to the next level. By all means, please show us what you've got so far. Thanks in advance.
05-22-2009, 01:32 PM
#6
Tech Regular
iTrader: (3)
If someone made an under chassis aero package to fit a 1/10 scale sedan, would it help going into a corner by creating a "vacume" effect?
At the rear of the car a diffuser, and on each arm, a divice to creat vacume as the air passes under the arm. Lets say that it was to gain around 3 to 5% additional downforce at the tires, would it be worth it? The total weight would be less than 8 grams.
Would it bennefit the average club racer?
Who would it benneifit if anybody?
Would you buy it?
WOULD YOU LIKE TO SEE THIS?
any input is welcome, negative or positive.
At the rear of the car a diffuser, and on each arm, a divice to creat vacume as the air passes under the arm. Lets say that it was to gain around 3 to 5% additional downforce at the tires, would it be worth it? The total weight would be less than 8 grams.
Would it bennefit the average club racer?
Who would it benneifit if anybody?
Would you buy it?
WOULD YOU LIKE TO SEE THIS?
any input is welcome, negative or positive.
I've not seen anything like this on the nitro level, but people have been cutting out the back of their bodies for years for a similar effect, especially at the 1/8 scale level. If I'm not mistaken there are now ROAR rules on how much you can cut out.
05-22-2009, 01:45 PM
#7
I did try it on a MRX4, a big plate with only holes for the wheels and flywheel. With 50km/h it was already sticking to the ground and it was almost possible to take a 180 degrees corner at the end of the straight at full throttle.
You do need to change the whole setup. Stronger springs and minimize the travel of the suspension by the up and downstops.
You do need to change the whole setup. Stronger springs and minimize the travel of the suspension by the up and downstops.
05-22-2009, 02:09 PM
#8
A slight improvement in underbody aerodynamics would be a good thing i think.
It's really easy to get about 50% more downforce from a underfloor package, but this would require a completely new suspension system with far more advanced dampers and a pushrod-rocker combination. Otherwise you will have a car which drags across the surface on the straight or you have a such stiffly sprung car which just doesn't corner when you approach a slow corner.
One of the things i'm currently experimenting with is the front splitter and the rear wing endplates. Almost nobody uses the rear wing end plates but they make a tremendous effect on rear end stability.
And under efra ruling any underbody aerodynamics are disallowed i believe.
But it would be a cool project to complete, putting in faster laps with a 1/10 scale tourer, than a 1/8 scale.
Ow and i would like to see what you have came up with.
With the current 1/10 rear suspension there isn't much room for a proper diffuser. You will have to make it too steep to fit which will result in the air losing contact with the diffuser.
It's really easy to get about 50% more downforce from a underfloor package, but this would require a completely new suspension system with far more advanced dampers and a pushrod-rocker combination. Otherwise you will have a car which drags across the surface on the straight or you have a such stiffly sprung car which just doesn't corner when you approach a slow corner.
One of the things i'm currently experimenting with is the front splitter and the rear wing endplates. Almost nobody uses the rear wing end plates but they make a tremendous effect on rear end stability.
And under efra ruling any underbody aerodynamics are disallowed i believe.
But it would be a cool project to complete, putting in faster laps with a 1/10 scale tourer, than a 1/8 scale.
Ow and i would like to see what you have came up with.
With the current 1/10 rear suspension there isn't much room for a proper diffuser. You will have to make it too steep to fit which will result in the air losing contact with the diffuser.
05-22-2009, 02:14 PM
#9
pics of aero package
this is the first version I am working on. Removed the photos for now....
Last edited by rcfoolz; 05-25-2009 at 05:41 AM.
05-22-2009, 02:21 PM
#10
second set of pics Sorry, I removed the photos for now. I will be reposting them soon. Thank you.
Last edited by rcfoolz; 05-25-2009 at 05:43 AM.
05-22-2009, 02:45 PM
#11
I like the HPI setup, and I know this is just a crude setup, but still in testing/development. I had made a carbon fiber set, but the weight was too much and too bulky.
anyway, open to ideas and any comments.
anyway, open to ideas and any comments.
05-23-2009, 05:30 AM
#13
wow this is a great idea!! keep it up rcfoolz. the future is here
05-23-2009, 10:27 AM
#15
Yes, I had talked to Art about this about a year ago and he had given me a link to some photo's of what was done then.(they are no longer available) I had a few calls about this and they had mentioned this and they "claimed" that the car was better, but that was from a viewers standpoint. I talked to Art and he had explained that it was more noticable in the 1/8 than the sedan, but they hadn't worked on the front underside of the chassis. One of the gains was more mid corner speed and stability. I'm working on a second design to test tomorow based on a conversation I just had with Art today. when this is all worked out, I will be sending it to someone to test and post their results. (I did this with the carbon fiber chassis I made 4 years ago)