Speed timing at Bonneville

[jacksoni]

OK, you start tripping beams at Mile 1, which starts a clock.  When you hit mile two, it takes the new time, subtracts the old, then divides by 60 and 60 to get average MPH through that segment.
This happens at every mile, 1-2, 2-3, 3-4, 4-5.  Or for the short course, 1-2, 2-3.

To set a record, you must exceed the average speed in the record book in any 1 mile segment.

The next day, you must average your 1-2, 2-3, (3-4), (4-5) from both runs.

Say you go 150, 155 on the two segments of the short course.
The next day, you run 160, and 170 on the same segments.

The average of the Mile 1 is 155mph.  The average for the mile 2 is 162.5.  Your official record becomes 162.5, not 170 or 160.

Clear as mud?

On the short course, only the 2-3 segment counts for records or qualifying.  The 1-2 is for information only. ON the long course, the fastest mile is used and the same mile is used ( generally, but not always, the 4-5) See also Glen's response. And while on that topic- Glen- that is a real bummer. We will miss you.

[Glen]

There are records on the 1 2 mile as well for the slower vehicles.

[desotoman]

I got my answer, thanks.

Tom G.

[Nortonist 592]

On the short course you are timed from the 1mile to the 2 mile.  As Glen has pointed out the 2 1/4 is for speed (for qualifying for the long course I think he said).  Doesn't count for a record time.  The 1 to 2 mile speed can be used for record timing.

[jacksoni]

There are records on the 1 2 mile as well for the slower vehicles.

I stand corrected but this is mostly only for the really slow vehicles such as 50cc bikes etc, is it not?

[ol38y]

I qualified this year at Speedweek from 1 2 and 2 3 @ 165 and 169 respectively on a 164 record.

[Trouble]

There are records on the 1 2 mile as well for the slower vehicles.

I stand corrected but this is mostly only for the really slow vehicles such as 50cc bikes etc, is it not?

Dunno.  I went over 183 GPS going into the 1 mile beam before I realized I was going too fast.  I was tech limited to 175.  I think one of my records was 1-2 + 1-2?

Probably if I hammered it, I could have tagged 200 ground speed through the 1 beam.