Tom Posted March 15, 2006 Share Posted March 15, 2006 At what speed do aerodynamics really come in to play? I was just thinking the other the day that the very few times i've hit just over 120 leps that I feel a very strong force against the car and I'm presuming this is the sort of speed? Link to comment Share on other sites More sharing options...
Alex Posted March 15, 2006 Share Posted March 15, 2006 Anything over wind speed.... Link to comment Share on other sites More sharing options...
TLicense Posted March 15, 2006 Share Posted March 15, 2006 Drag squares with speed.... Link to comment Share on other sites More sharing options...
Tom Posted March 15, 2006 Author Share Posted March 15, 2006 hmmm, it's just seemed strange really, just below 120 not much force but just over that point it seems like it's really slowing down. Link to comment Share on other sites More sharing options...
AJI Posted March 15, 2006 Share Posted March 15, 2006 aerodynamics play a part at any speed really... because even at low speeds you get cross/head/tail winds which can affect things like fuel economy etc. But aerodynamics obviously play a bigger part the faster you go. There isn't really a definitive speed as to where they will suddenly start to work. Link to comment Share on other sites More sharing options...
Digsy Posted March 15, 2006 Share Posted March 15, 2006 I've heard 100mph bandied about as a rough speed at which aero effects really start to make a difference. This was discussed in depth a while back here (once the thread got going on page 2, that is). The calcs are there for you to be able to work it all out for yourself. Link to comment Share on other sites More sharing options...
TLicense Posted March 15, 2006 Share Posted March 15, 2006 Anyway, it will be a smooth transistion, not like hitting a brick wall. Not within the space of 10 mph (ie 115 - 125) anyway. Link to comment Share on other sites More sharing options...
Tom Posted March 15, 2006 Author Share Posted March 15, 2006 Anyway, it will be a smooth transistion, not like hitting a brick wall. Not within the space of 10 mph (ie 115 - 125) anyway. That's what it seems like though? once the car is on the road again I'll give it anohter go. Link to comment Share on other sites More sharing options...
TrickTT Posted March 15, 2006 Share Posted March 15, 2006 just over 120 leps that I feel a very strong force against the car Thats the down wash from the police helicopter:eyebrows: Link to comment Share on other sites More sharing options...
JohnA Posted March 15, 2006 Share Posted March 15, 2006 Thats the down wash from the police helicopter:eyebrows: That's because you didn't go close to Heathrow or Gatwick quickly enough:D Link to comment Share on other sites More sharing options...
AJI Posted March 15, 2006 Share Posted March 15, 2006 if you drew a graph of drag against speed there will be places throughout the speed range where the drag will increase at a higher rate that at certain other speeds.... due to the aerodynamics having a 'sweet spot' where at a certain speeds you have the best laminated flow of air and at other speeds the airflow will delaminate and cause extra drag. Generally this would be hardly noticable. Have you checked underneath your car for anything that may be loose or hanging down in the path of the oncoming air? Link to comment Share on other sites More sharing options...
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