Nuxx:%cil.12495$Ci3.9628@newsfe17.ams2

Path: number1.nntp.dca.giganews.com!border2.nntp.dca.giganews.com!nntp.giganews.com!postnews.google.com!news1.google.com!npeer03.iad.highwinds-media.com!feed-me.highwinds-media.com!cyclone03.ams2.highwinds-media.com!news.highwinds-media.com!npeersf02.ams.highwinds-media.com!newsfe17.ams2.POSTED!7564ea0f!not-for-mail Message-ID: <_%cil.12495$Ci3.9628@newsfe17.ams2> From: _  Newsgroups: uk.rec.cycling Subject: Re: spindthrift - magnatom antics Date: Wed, 04 Feb 2009 09:14:18 +0000 References:   	  	 	  	<68Yhl.6780$aJ3.722@newsfe23.ams2> <777496e0-8621-428f-b947-9fdc2bb54fe1@r10g2000prf.googlegroups.com> 	 <333176e5-16c3-474f-8545-9bcdd4257187@g39g2000pri.googlegroups.com> 	  	 <6050a5ce-756b-4370-83ac-3fde01618107@g39g2000pri.googlegroups.com> 	 <013eccfa-e8a8-40d5-a0d3-90f066c120a2@b38g2000prf.googlegroups.com> Lines: 46 User-Agent: Thunderbird 2.0.0.19 (Windows/20081209) MIME-Version: 1.0 In-Reply-To: <013eccfa-e8a8-40d5-a0d3-90f066c120a2@b38g2000prf.googlegroups.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit NNTP-Posting-Host: 82.21.204.127 X-Complaints-To: http://netreport.virginmedia.com X-Trace: newsfe17.ams2 1233738874 82.21.204.127 (Wed, 04 Feb 2009 09:14:34 UTC) NNTP-Posting-Date: Wed, 04 Feb 2009 09:14:34 UTC Organization: virginmedia.com Bytes: 4364 Xref: perfectly-safe.chapmancentral.co.uk uk.rec.cycling:684977

Nick L Plate wrote: > On 3 Feb, 15:24, _  wrote: >> Our racer's been laid up outside - its too big to get in the shed - >> since it was last used at Belchford downhill where we found ourselves to >> be very competitive with vastly better resourced vehicles. Putting it on >> axle stands and spinning the wheels, the two rear ones span, on a full >> arms shove - subjective but good enough for our purposes -, for between >> 70 and 90 seconds each. Stripping the hubs down and pulling out the >> bearings, we cleaned them and their recess and put them back dry, then >> added a couple of drops of 3in1 to each set. The wheels then span for >> more than eight minutes, but the racket off them is awe-inspiring. >> Longevity isn't an issue as the course is under a mile and we're happy >> to change bearings even between runs if we have to, but it'd be nice to >> be a bit quieter, if only because other teams will wonder whether we >> simply didn't bother putting the bearings back. We've already got tyres >> that were recommended in this group last summer, and we run them at >> about twice the PSI on the sidewall (about 100 or so PSI) so they're >> solid as a rock. Without resorting to rebodying the kart for >> aerodynamics, what else can we do to improve optimum speed? > > Rubber mounts for your axles. > If your bearings are plain(not rolling ball), you may fins that lard > is better. > If you are using ball bearings, use 3inone "cycle" oil. Yellow > instead of red graphics.

I'll look out for it. How much? (Not how much IS it, how much to USE) > Gearbox oil works well. > Increase your kart's mass to the maximum permissable, then adjust your > tyre pressures for fastest times.

Yup, we're at max weight allowed, ballasted for change of 'drivers'. > A lower pressure may well improve > your time over a pressure suitable for a billiard table.

That seriously hadn't occurred to me - why would a lower pressure be likely to help? > You really > should be using disc wheels. > We've made discs from resin'd card as we couldn't find discs to suit the wheels. One of our biggest issues that I forgot to mention is that our wheels are still hung off their original forks, but that the weight is not OVER the hub in the conventional way and is instead obviously much greater on the inner face. Is it possible to beef up one side of bearings to account for that?