Mike Molloy Posted June 9, 2005 Share Posted June 9, 2005 Given the interesting wind tunnel development work done by Caterham in developing the CSR, I am thinking of replacing my front wings with something more aerodynamic. I liked the "180 degree"-style used by Andy Charsley on his RGB Striker, but they are designed for 15" wheels, so a bit big for my 13" CR500s (527mm dia.) or 6/21-13 slicks (520mm dia.) I want something that fits as closely as possible to the tyre. Any suggestions? Link to comment Share on other sites More sharing options...
susser Posted June 9, 2005 Share Posted June 9, 2005 Dunno what's around, and I run Flares 'cos I like 'em. Seems to me that the most exciting thing that's happened to cycles is the spoiler on CSR cycles that "spoils" the air trying to stick to the mudguard and make it down to the bottom. That's the equivalent of winglets on a 747. Fashion can go to hell. Link to comment Share on other sites More sharing options...
Irrelevant Posted June 9, 2005 Share Posted June 9, 2005 Don't the winglets on 747s make a significant difference to the drag......something to do with taking turbulence away from the wing tips I'm putting CSR wings on my car because they look cool 😳 😬 Must get the Gigabusa finished Link to comment Share on other sites More sharing options...
moosetestbestanden Posted June 10, 2005 Share Posted June 10, 2005 Don't the winglets on 747s make a significant difference to the drag Yes. See here Link to comment Share on other sites More sharing options...
Peter T Posted June 10, 2005 Share Posted June 10, 2005 Sorry Adam, i still have your front CSR wings, do you want me to bring them to the Surrey Meet on Thursday. 🤔 Carbon Components from K9 Composites Link to comment Share on other sites More sharing options...
Mark Durrant Posted June 10, 2005 Share Posted June 10, 2005 The CSR wings also double as a glass stand when kicking tyres at an area meet Mark D Su77on Se7ens Link to comment Share on other sites More sharing options...
Irrelevant Posted June 10, 2005 Share Posted June 10, 2005 Peter: Yes please bring them along...... Must get the Gigabusa finished Link to comment Share on other sites More sharing options...
Myles Posted June 10, 2005 Share Posted June 10, 2005 Don't the winglets on 747s make a significant difference to the drag......something to do with taking turbulence away from the wing tips Kind of. As I understand it, the endplates on any wings (F1 included) help stop air from the upper and lower surfaces mixing at the end of the wing - which does reduce turbulence and drag. Project Scope-Creep is live... Alcester Racing 7's Equipe - 🙆🏻™ Alcester-Racing-Sevens.com Link to comment Share on other sites More sharing options...
Mike Molloy Posted June 10, 2005 Author Share Posted June 10, 2005 Peter T - do K9 Composites sell a CSR-alike front wing in CF? If so, how much, and how wide is it? I only want to cover a 175 CR500. Thanks. Link to comment Share on other sites More sharing options...
Peter T Posted June 10, 2005 Share Posted June 10, 2005 Ahem.. strictly speaking, we will be manufacturing something along the lines of the CSR wing. Please don't ask when, it is in the pipeline and when it's ready we will announce. The current problem with the CSR wings is that they need a special wingstay, we are trying to keep the original to keep costs down. Carbon Components from K9 Composites Link to comment Share on other sites More sharing options...
Mike Molloy Posted June 10, 2005 Author Share Posted June 10, 2005 As the current wingstay mounts the wing about 2 inches above the tyre it's not exactly my favourite piece of engineering. Ideally I'd like a wing with minimal side height so it can be fitted very close to the tyre while still allowing wheel removal. DAX wings are a nice shape but much too wide for me. Also, flat wingstays (instead of tubular) would assist the above. Link to comment Share on other sites More sharing options...
Peter T Posted June 10, 2005 Share Posted June 10, 2005 Point noted Mike, wheel removal is important, also tyre hugging is preferred. Trying to change the design of the current wingstay would be not viable for us, so making the wing to fit standard wingstays is what we will do. Carbon Components from K9 Composites Link to comment Share on other sites More sharing options...
Mark Durrant Posted June 10, 2005 Share Posted June 10, 2005 Mike Why not cut and shut your existing wingstays to height of your choice and get them repowdercoated...probably a winter project though Mark D Su77on Se7ens Link to comment Share on other sites More sharing options...
Mike Molloy Posted June 10, 2005 Author Share Posted June 10, 2005 "Why not cut and shut" - cos I can't weld... That was my first thought when I put the wheels back on without the wings fitted. I realised what a poor fit the standard stays are for the CR500 rollerskate wheels. However, they are pretty strong. If I made stays out of ally they would almost certainly flap around all over the shop. I think I need some wings off a Mallock or similar. They are pretty small dia. Link to comment Share on other sites More sharing options...
susser Posted June 10, 2005 Share Posted June 10, 2005 When I said it's the equivalent, I didn't mean they do the same thing. Wot I meant was that they are a major step forward. The wing tip vortices form when the high(er) pressure air on the underside of a lifting surface tries to get to the low(er) pressure of the top of the same. The clever thing about a winglet is that to do so it would have to go either up and over the top, (and by the time it gets there the differential pressure is zero so it doesn't bother) or around the leading or trailing edges. (which it can't be 🙆🏻d.) Therefore a major reduction in wingtip vortex. The little spoiler bit on the CSR wing, on the other hand, gets the air that is flowing over the top (low pressure) surface of the wing, and trips it up before it can go down the back. (This would cause drag if it was allowed to flow over the back, as the force is always perpendicular to the lifting surface. At the back of a cycle wing, this perpendicular force would be pointing backwards and hence causing drag.) The flow breaks away from the surface and trails away as a series of shed vortices. So. It's absolutely nothing like winglets at all in fact. Good job I didn't say it was like a spoiler on the back of a Porsche. Doh !! Link to comment Share on other sites More sharing options...
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