Unofficial Royal Enfield Community Forum

Royal Enfield Motorcycles => Bullet with the UCE engine => Topic started by: prof_stack on September 11, 2010, 06:24:06 pm

Title: MPH , RPM's and Gearing
Post by: prof_stack on September 11, 2010, 06:24:06 pm

While slacking off from grading some math quizzes, I put this together for fun.  I believe it is the gearing for the C5.  Is the G5 the same?

                              RPM
     1,000    2,000    3,000    4,000    5,000    5,250
1:       5        11       16         21        26        28
2:       8        16       24         32         40       42
3:     11        21       32         43         53       56
4:     13        27       40         53         67       70
5:     16        32       49         65         81       85
                      MILES PER HOUR

Title: Re: MPH , RPM's and Gearing
Post by: BRADEY on September 12, 2010, 07:59:43 am

Hello Professor,
How have you calculated this. Have you done it manually or otherwise.
Thanks for a response. Cheers.

Title: Re: MPH , RPM's and Gearing
Post by: prof_stack on September 12, 2010, 05:44:57 pm

Bradey, I used the figures for 1k for each gear posted recently (can't remember the thread, sorry) and extrapolated for the rest of the rpm's. 

Here is an updated version with the limiter at 5.5k rpm's, according to Kevin M's post yesterday:


             RPM
   1k  2k  3k  4k  5k 5.5K
 1  5  11  16  21  26  29
 2  8  16  24  32  40  44
 3 11  21  32  43  53  59
 4 13  27  40  53  67  73
 5 16  32  49  65  81  89
       MILES PER HOUR

Title: Re: MPH , RPM's and Gearing
Post by: enfield freddy on September 12, 2010, 08:10:12 pm

I have a excel s/sheet for the 4 speeder models , allows you to alter tyre sizes , gearbox cogs and engine cogs , as well as setting the max RPM

anyone needs a copy , or could host it , please PM me

Title: Re: MPH , RPM's and Gearing
Post by: singhg5 on September 12, 2010, 11:51:56 pm

BRADEY:

Here is one of the programs / spread sheets that can calculate values of RPM, Gear and Speed.  The values for C5 were done by Quinn (qgolden on this Forum) a few weeks back using this spread sheet.   Anyone can enter the values.  Here is the link -

             http://woodsware.aciwebs.com/gears/gears.asp

singhg5

Quote from: BRADEY on September 12, 2010, 07:59:43 am

Hello Professor,
How have you calculated this. Have you done it manually or otherwise.
Thanks for a response. Cheers.

Title: Re: MPH , RPM's and Gearing
Post by: qgolden on September 15, 2010, 01:28:12 pm

Using the Data Calculated a few weeks ago, I put little white dots on the face of my speedo at the max RPM Values for each speed in each gear.  Gives me a mental   ::) reference to peak torque/HP in each gear.