3 ms·
Coefficient of drag normalizes relative to cross sectional area. Pointing out that a modern Ram 1500 has a lower Cd than an old Mercury doesn't mean the Ram has
by wtallis 5y ago
Coefficient of drag normalizes relative to cross sectional area. Pointing out that a modern Ram 1500 has a lower Cd than an old Mercury doesn't mean the Ram has less drag. If the Ram's cross sectional area is 30% larger, it will have more drag than the Mercury despite having a more aerodynamic shape.
- drewzero1 5y agoThanks for pointing this out; I was unaware. There's also a table of cross-sections later in the linked Wikipedia page, but I hadn't paid much attention to it because of not knowing how to perform a meaningful comparison.
- Wistar 5y agoI have heard that a Spoon Sports modified F20c can do 11k reliably. The engine has a very long stroke for its size, and stock, the piston speeds are already higher than almost any other car engine, so that it can spin as fast as it does is pretty amazing. Motorcycle engines, however… Some of those are 14-16K stock.