Obree to go for record

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   It should be remembered that most NACA profiles are wing-sections. In other words, profiles intended to be extruded. If you correct the profile for the same pressure distribution for a 3D shape (or revolved section) you get a maximum thickness much further back. I'd say a low frontal area bike is more like a revolved profile than an extruded one.

Also, the position of the 'pedal-box' on a prone bike means they don't tend to end up very teardrop-shaped anyway.

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GeoffBird Members Profile Send Private Message Find Members Posts Add to Buddy List BHPC Member Joined: 20 September 2005 Status: Offline Points: 2396	Post Options Post Reply Quote GeoffBird Report Post Thanks(0) Quote Reply Posted: 29 June 2012 at 12:16am
	It should be remembered that most NACA profiles are wing-sections. In other words, profiles intended to be extruded. If you correct the profile for the same pressure distribution for a 3D shape (or revolved section) you get a maximum thickness much further back. I'd say a low frontal area bike is more like a revolved profile than an extruded one. Also, the position of the 'pedal-box' on a prone bike means they don't tend to end up very teardrop-shaped anyway.
	Right Time - Right Place - Wrong Speed

AlanGoodman Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Club Chairman Joined: 04 March 2005 Location: United Kingdom Status: Offline Points: 8036	Post Options Post Reply Quote AlanGoodman Report Post Thanks(0) Quote Reply Posted: 03 July 2012 at 1:43pm
	OMFG as the kids would say...


graydog Members Profile Send Private Message Find Members Posts Add to Buddy List BHPC Member Joined: 16 January 2006 Location: Wales Status: Offline Points: 1481	Post Options Post Reply Quote graydog Report Post Thanks(0) Quote Reply Posted: 03 July 2012 at 7:26pm
	just hope he does not start turning up at bhpc races! gonna kill the feild! see off twitter delft has a problem or two... :-( let's hope they can sort things

AlanGoodman Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Club Chairman Joined: 04 March 2005 Location: United Kingdom Status: Offline Points: 8036	Post Options Post Reply Quote AlanGoodman Report Post Thanks(0) Quote Reply Posted: 03 July 2012 at 8:24pm
	And here it is in action... http://vimeo.com/45034602


bazz Members Profile Send Private Message Find Members Posts Add to Buddy List BHPC Member Joined: 29 December 2009 Location: West London Status: Offline Points: 308	Post Options Post Reply Quote bazz Report Post Thanks(0) Quote Reply Posted: 03 July 2012 at 8:35pm
	that's really cool to see it working, cheers for sharing Alan.
	https://www.theknottybear.co.uk//

AlanGoodman Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Club Chairman Joined: 04 March 2005 Location: United Kingdom Status: Offline Points: 8036	Post Options Post Reply Quote AlanGoodman Report Post Thanks(0) Quote Reply Posted: 03 July 2012 at 9:07pm
	Is it only me that is reminded of Burt Munro? If you haven't seen "The World's Fastest Indian" it's well worth a look...


Yanto Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 11 July 2005 Status: Offline Points: 1521	Post Options Post Reply Quote Yanto Report Post Thanks(0) Quote Reply Posted: 03 July 2012 at 9:16pm
	Yes there are similarities now you mention it, doesn't his bike still hold a record? You are referring to the film with Hanibal Lectur in it aren't you?

AlanGoodman Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Club Chairman Joined: 04 March 2005 Location: United Kingdom Status: Offline Points: 8036	Post Options Post Reply Quote AlanGoodman Report Post Thanks(0) Quote Reply Posted: 03 July 2012 at 9:22pm
	Yep! That's him... http://en.wikipedia.org/wiki/Burt_Munro


GeoffBird Members Profile Send Private Message Find Members Posts Add to Buddy List BHPC Member Joined: 20 September 2005 Status: Offline Points: 2396	Post Options Post Reply Quote GeoffBird Report Post Thanks(0) Quote Reply Posted: 03 July 2012 at 10:09pm
	Thanks for the vid Alan. That transmission does look a bit clunky doesn't it. Keeps his feet very close together though.
	Right Time - Right Place - Wrong Speed

blogwat Members Profile Send Private Message Find Members Posts Add to Buddy List BHPC Member Joined: 30 January 2010 Location: nottingham Status: Offline Points: 661	Post Options Post Reply Quote blogwat Report Post Thanks(0) Quote Reply Posted: 04 July 2012 at 9:22am
	Hi Folks fair play to the man he is giving it a go although his breathing sounds a bit limited but I'm sure with practice and some refinements things should get better thanks for sharing Alan intersting to see his developement. Jeff.
	when your up to your waist in aligators they forget to tell you you've got to clear the swamp