Thanks billgate803 C-Hing's comment. However, I've a concern about this statement.... 1/10的F1隻尾翼 是模仿真車~ 所以下壓力很接近真車~
Indeed RC cars never use aerofoil wings (except RC F1 which needs to have the same look-and-feel as real 1:1 F1), whilst 1:1 cars and planes do. The reason is.... Very simple... RC cars go too fast and are too small... 
Air is actually fluid, both has inertia, of course air isn't as dense as fluid so it can move up and down a few centimetres flowing over a wing of a 1:1 plane, or indeed a few metres long. However in 1:10 RC car, you can only have a wing a few centimetres long, which means making air move up and down over a wing only a few centimetres long at say, even 80km/h, is just impossible because air doesn't oscillate that fast! For example, a bee don't use aerofoil wings, its wings are flat because it doesn't work at that scale.... 
From various studies, 17 degrees seems to be the maximum angle of attack for aerofoil wings, if higher than that angle, it stalls.... In fact, only 20% downforce comes from the increased pressure at the top of the wing, while 80% downforce comes from the low pressure on the underside of the wing. It's obvious that 17 degrees is not sufficient to produce downforce with a scale-looking wing (The one we saw in 1:10 F1) because of why? Still remember what I said? Air doesn't scale!!
Furthermore, as I said above, most downforce is generated from the low presure on the underside of an aerofoil wing, which means the wing has to be mounted high up, well away from the body to get clean air (dirty air will not work great in aerofoil type wing!). However, due to RC car race rule which doesn't allow your wing to be higher than your car body's ceiling; and also RC car always crash and upside down which damages your high mounted wing easily, so you can hardly collect all needed clean air for aerofoil type wing in RC. But those 90 degree wing is ok because you don't have to worry about joining the streams above and under the wing back together, although it is not as efficient as an aerofoil wing, it will produce some downforce at least. Moreover 90 degree type RC race wing can be fed with dirty air because air is air, doesn't matter it's clean or dirty as you just force it to go upwards! 
其實1/10TOURING 隻尾翼 "DOWNFORCE設計"~ 如1/1隻尾翼係用同樣形狀是超大下壓力的~
所以1/10TOURING下壓力~ 一定比1/1真車的外殼更大~
1/10的F1隻尾翼 是模仿真車~ 所以下壓力很接近真車~
所以1/10F1的下 ...
billgate803 發表於 2010-2-25 18:59 |
樓主: gtimax
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