Mazda Rotary Club

Cars by Model Type => Cosmo's and Other Rotary Powered Vehicles => Rotary Motorbikes => Topic started by: Norton on June 10, 2005, 12:37:48 AM

Title: NSU Drag bike
Post by: Norton on June 10, 2005, 12:37:48 AM
http://www.hurley-engineering.ltd.uk/concord.aspx (http://www.hurley-engineering.ltd.uk/concord.aspx)

1982, 8.2 sec at 164MPH
Title: NSU Drag bike
Post by: MikeLMR on June 10, 2005, 12:17:09 PM
the current Uk rotary record holder then ?
Title: NSU Drag bike
Post by: Norton on June 11, 2005, 03:41:33 PM
Quote
Originally posted by MikeLMR
the current Uk rotary record holder then ?

I guess so, yes, although the UK rotary cars are catching up fast... the  RE:Worx car has just run a 9.8 @ 143mph today (11/06/05). :eek:
Title: NSU Drag bike
Post by: Norton on December 16, 2005, 11:51:46 PM
What a shame its not still running, would\'ve been great to have it run at Rotorstock. It might have been running in the 7\'s by now.
Title: NSU Drag bike
Post by: Carl on December 17, 2005, 05:34:32 PM
Eamon Hurley told me a long time ago that he came off the bike quite bad many years ago and he never recaed it again.
It used NSU rotary parts and was triple rotored.
Regards
Carl
Title: NSU Drag bike
Post by: 20B_boy on December 17, 2005, 06:25:38 PM
Says on Hurleys website that the last time it ran he binned it at 156mph - but didnt break any bones - born lucky I guess!

Site also says it was a twin Carl?:

Twin rotor NSU rotary engine
3.5 litre wade super-charger
Hillborn fuel injection system with Nitrous Oxide
Two piece crankshaft, with centre main bearing
Swing Tip Seals, Duplex Side Seals
\'O\' Ringed Corner Pins
No Sparking Plugs or Distributor
Dry Weight 748 lbs
Fuel Methanol and 25% Nitro-methane
Fuel Consumption, 8 Gallons/mile
Title: NSU Drag bike
Post by: MikeLMR on December 17, 2005, 06:26:55 PM
bet he had some severe gravel rash ofter that spill !
Title: NSU Drag bike
Post by: Carl on December 17, 2005, 06:47:24 PM
Interesting that the site say\'s it was a 2 rotor Rich.Eamon definitely told me it was a triple and even showed me the engine from it many years ago.
funny that.
Regards
Carl
Title: NSU Drag bike
Post by: Norton on December 19, 2005, 09:32:37 AM
Quote from: Carl
Interesting that the site say\'s it was a 2 rotor Rich.Eamon definitely told me it was a triple and even showed me the engine from it many years ago. funny that. Regards Carl

I think he must have been telling you about his triple axle RO80 over \'a few\' beers  :Laugh
Title: NSU Drag bike
Post by: Carl on December 20, 2005, 12:29:32 PM
oh well,
maybe the engine is like the dummy 6 rotor engine they have put together?

Regards
Carl
Title: NSU Drag bike
Post by: Ricco_04 on December 20, 2005, 12:51:26 PM
Sorry, am I reading that right - Did you say 6 ROTOR!  :InLove
Title: NSU Drag bike
Post by: Carl on December 20, 2005, 01:12:35 PM
Hurley\'s have not done a 4 rotor yet,but they took a dummy mock up of a 6 rotor to a show a while ago with no internals.
I have built a 54 rotor engine mock up with no internals too.LOL!
Regards
Carl
Title: NSU Drag bike
Post by: travellinbob on December 20, 2005, 05:28:49 PM
I wonder where they got themselves a 2 piece crankshaft from way back in 82???
 and 8 miles to the galon isnt too bad considering the speed and power output of the beast. (not that I rcomend everyone using meth and nitro mix.... I dont quite understand the whole no spark plug thing either.
 Last point, would the hillbourne injection have been mechanical? I saw a 13b with mech injection once in oz in a oval dirt track racer. Not seen too much more of that type of set up though.
  cheers, michael.
Title: NSU Drag bike
Post by: MikeLMR on December 20, 2005, 05:32:37 PM
probably made it themselves, they aren\'t that complicated.

edit* Nitromethane is a compression ignition fuel (like the little glow plug engines :) )  I guess thats why they have a HUUGE supercharger too
Title: NSU Drag bike
Post by: Carl on December 20, 2005, 06:18:22 PM
The top fuel guys still use spark plugs on Nitromethane with serious high power magneto\'s,45 amp\'s.They have 2 plugs per cylinder.
By about half way up the track the spark plug tips have melted and the white hot metal ignites the fuel.6000 hp minimum.All from 11 litre engines.
Regards
Carl
Title: NSU Drag bike
Post by: Norton on December 20, 2005, 08:55:22 PM
Quote from: travellinbob
I dont quite understand the whole no spark plug thing either.

I seem to recall that Norton had a problem with the rotor housings cracking at the spart plug holes which proved to be a weak spot on the water cooled version of their engine. Maybe they had the same problem with the NSUs and decided to eliminate the problem by having no plugs and therefore no plug holes??
Title: NSU Drag bike
Post by: Carl on December 20, 2005, 10:29:14 PM
Quote from: Norton
I seem to recall that Norton had a problem with the rotor housings cracking at the spart plug holes which proved to be a weak spot on the water cooled version of their engine. Maybe they had the same problem with the NSUs and decided to eliminate the problem by having no plugs and therefore no plug holes??


Eamon did not use spark plugs but did use glow plugs instead.It was more a case of not finding a plug that could take it than the hole in the housing.
Regards
Carl