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Old 11-08-2011, 03:43 PM   #16
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what's being used to hold the wing sides on? double sided tape, shoe goo, glue, etc...?

i also noticed that most of the overseas cars use the sides but here in the usa most do not, reason?
I usually CA them on. Double sided tape doesn't hold up to crashes/rollovers very well.
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Old 11-08-2011, 05:50 PM   #17
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I usually CA them on. Double sided tape doesn't hold up to crashes/rollovers very well.
Shoe Goo is hit or miss, too. I usually loose one a race session outdoors.
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Old 11-09-2011, 03:05 AM   #18
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These cutouts. I did open them on the speed6 body I have.
And did you try putting tape over them and going out again to see what difference it makes?
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Old 11-09-2011, 03:08 AM   #19
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I also recall reading a piece which explained why we can get away with such steeply shaped wings etc on 1/10 cars (air molecules don't scale down etc, they are the same on everything), it was to do with the size of the air molecules and the comparatively lower speeds.
I can't remember where I saw it but it did make sense at the time.

Unless you're running on a fast 1/8 size track or similar I wouldn't bother cutting them at all.

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Old 11-09-2011, 04:36 AM   #20
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And did you try putting tape over them and going out again to see what difference it makes?
No, never thought of that... I do plan on trying one of those bodies again, so unless someone beats me to it i will try it. I do run on a track with high speed.
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Old 11-09-2011, 06:03 AM   #21
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Originally Posted by Skiddins View Post
I also recall reading a piece which explained why we can get away with such steeply shaped wings etc on 1/10 cars (air molecules don't scale down etc, they are the same on everything), it was to do with the size of the air molecules and the comparatively lower speeds.
I can't remember where I saw it but it did make sense at the time.

Unless you're running on a fast 1/8 size track or similar I wouldn't bother cutting them at all.

Skiddins
yep, it (force) doesn't scale. that's why we have a 'scoop' rather than a 'wing' for spoilers. because a 1:1 wing design (i.e. tamiya replica wings) won't really work unless you travel at speeds comparable to that of real cars.
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Old 11-09-2011, 07:57 AM   #22
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I did put tape over my holes but they changed the track and my setup didn't wotk too well. I need to do some A/B testing as I didn't have time to do it. Hopefully Friday I can run some lap with and some laps without to get some times.

Bigger fish to fry at this point id getting the car to navigate the tight corners on the new layout.

My car seemed pretty loose in the rear on the oval setup we had compared to the other cars which had no holes. On the new layout I couldn't radius the turns. One I get those dialed I will experiment with the holes.
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Old 11-09-2011, 12:33 PM   #23
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There was a test done on whether the holes make any difference in a UK magazine a few years ago.This was done by one of the Serpent team drivers (if my memory is Correct) using a 1/10th ic car.

The conclusion --- there was no difference in the overall lap times with or without holes
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Old 11-10-2011, 07:51 AM   #24
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The slats in the wing have nothing to do with decreasing drag. They do however allow the boundry layer of air to "escape" thus bringing the "laminar flow" air to a lower level and better able to contact more of the surface area on the kicked-up part of the wing. The term Wing is a poorly chosen name that we all use. "Air deflector" describes it more accurately.

The above is from Mr. Epp himself about the slots. I thought there was another more detailed post from him about it, but this is the only one I could find for now.
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Old 11-10-2011, 04:00 PM   #25
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I did some quick CFD testing of a standard protofrom rear wing with and without the Cut-out's

With Cut Out's at 80km/h

Downforce = 0.26kg
Drag = 0.173kg

Without Cut-Out's at 80 km/h

Downforce = 0.4kg
Drag = 0.177kg

As you can see the wing without the cut-out's generates almost twice the downforce compared to the on with cut-out's for no real change in the drag force.

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Attached Thumbnails
Rear wing cutouts?-cut-rear-wing-flow-pattern.jpg   Rear wing cutouts?-cut-rear-wing-pressure-plot.jpg   Rear wing cutouts?-uncut-rear-wing-flow-pattern.jpg   Rear wing cutouts?-uncut-rear-wing-pressure-plot.jpg  
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