Tue Jun 24 11:45:12 1997
- Message No. 1090
From: Juergen Reimann
Subject: Re: Tripmaster
Hi all,
Stefan Loth wrote:
>
> Hi everyone,
>
> lasst week I noticed something curious. The difference in showing the
> speed on Tripmaster and Tacho is about 5%.
> But ...
> After filling gas I've set the Tripmaster to "0". Due to the Tacho, 90
> km (+-200 m) later, the Tripmaster showed only 87,1 km. Has somebody a
> explanation about the difference of apr. 2,7 km?
>
I have a similar experience with the speed shown by the tripmaster. My
tripmaster shows 5-7% less than the nornal speedometer and so I was a
bit disappointed, cause this means my bike wouldn't run 185km/h but only
175. 2 weeks ago I did the following experiment: At 10pm (absolutly no
traffic, possibility to ride an exact speed without breaking or
accelerating) I went to the 4-lane highway from Darmstadt to Frankfurt
which has a 9km long piece of road with no curve in it. I tried to fix
my speed at 120km/h (shown by the tripmaster, some 127 shown by the
normal speedometer). I stayed on the second lane for 8km (acc. to the
distance markes at the highways) with a minimum speed of 118 and a
maximum of 121. So my average speed should have been slightly below
120km/h. The 8km took 3:54min and on the way back 3:53 min, that is a
speed of 123km/h. So I think the tripmaster shows 2-3% less speed, the
normal speedometer shows 3% too much. The other day I watched the
km-counters: Both (tripmaster and normal one) showed 7.8km for this 8km
piece of road, which fits to the wrong speed (2-3% less way, same time,
-> 2-3% less speed). I didn't measure the circumference of my front
tire, it's a Metzler Enduro 4 approx. 5000km old.
Any other experiences, comments?
bye
jr
--
!!! new e-mail: jr@aero.th-darmstadt.de !!!
-> Juergen Reimann <<>> THDarmstadt <<>> Aerodynamik & Messtechnik <<<
->> jr@aero.th-darmstadt.de Tel: +49 6151 166562 <<<
->>> http://home.pages.de/~jr Fax: +49 6151 162201 <<<
->>>> Petersenstr. 30 64287 Darmstadt Germany <<<
->>>>> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< pnp -- plug'n'pray <<< <<<
|---------------------------------------------------------|
| And yet another mail from the Africa Twin Mailing List! |
| Meet us at irc #atic or try http://home.pages.de/~atic/ |
|---------------------------------------------------------|

dipper@normans.isd.uni-stuttgart.de