Jump to content

Recommended Posts

  • Replies 96
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted
11 hours ago, Shebeen said:

I doubt the actual temperature was above 40, but wasn't there so happy to be wrong.

The people who rode it definitely deserve the stories they have,  but a Garmin on a handle bar is not a reliable temperature measurement device.

On the morning of the race the predicted max weather for Oudtshoorn was 43 degrees, Attakwaskloof would typically be a few degrees hotter. Make sense that the 50s we saw on our Garmins could have been overstated, but definitely the heat in the kloof was at least in the mid-40s. There was virtually no wind on the coastal side of the kloof so even that would have been in the lower 40s 

Posted (edited)

752 people on the official entry list. 473 finished. But given the weather forecast some people decided not to ride. An hour before the 11-hour cut-off the commentator said 46% had finished. I guess DNF is between 40% and 50% of those who started.  

Edited by Stephan
Posted
1 hour ago, Skubarra said:

On the morning of the race the predicted max weather for Oudtshoorn was 43 degrees, Attakwaskloof would typically be a few degrees hotter. Make sense that the 50s we saw on our Garmins could have been overstated, but definitely the heat in the kloof was at least in the mid-40s. There was virtually no wind on the coastal side of the kloof so even that would have been in the lower 40s 

image.png.24236872e6ddf6c5114818a5a7934b33.png

ok, max temp forecast from SAWS was indeed 42, so I will take back my comment that it probably wasn't in the 40s. That is proper hot.

I'm sure there is actual data in the klein karro, but I quickly pulled the reading from the wind mast near prince albert for the day - didn't reach the 42 predicted. (yes it is ambient from up the mast itself, but not that different from the ground at the time

 

image.png.c4d485219e15509237c5229fc1210ac7.png

 

 

 

 

 

 

 

3 hours ago, ChrisF said:

 

It would be interesting to get some real technical feedback on this topic.

 

Many of us have seen the "temperature spike" when our bikes stand in the sun at the coffee stop....  sun directly onto the unit certainly has an impact, even more so when stationary.

 

 

Riding with the wind your body quickly overheats.  Pockets of dry hot air tends to cook me !

All data aside ..... RESPECT to the Attakwas riders !!!

 

it's probably up to 15'C difference. The temp on a watch/head unit is not to measure ambient temperature. It's just the internal temp of the device. Which of course is battery powered and sealed and running electronics.

It is mainly useless as an accurate reader of ambient temp unless it is in a stevenson screen/shaded. You can use it to measure water temp when scuba diving, but that's about the only thing that is useful as an accurate measure.

This is not rocket science, basic meterology. If you want accurate temp, Garmin do have a hardware solution of an external temp sensor, just don;t leave it in the sun.. Not cheap for what it is!

https://navworld.co.za/product/garmin-tempe/

 

3 hours ago, ChrisF said:

 

During a December ride I added ice to my bottle outside Paarl .... took about 25km before it was luke warm again.

HOT (ha ha) tip. Don't put ice and water in your bottles. Just put as many ice cubes as you can. The convection currents in the water melt the ice quicker. Whenever there is a bit of melted water, drink that to keep the ice cubes frozen for longer. (It's the same trick as defrosting a frozen steak in water going way quicker than in ambient air).

 

 

 

Posted
43 minutes ago, Shebeen said:

image.png.24236872e6ddf6c5114818a5a7934b33.png

ok, max temp forecast from SAWS was indeed 42, so I will take back my comment that it probably wasn't in the 40s. That is proper hot.

I'm sure there is actual data in the klein karro, but I quickly pulled the reading from the wind mast near prince albert for the day - didn't reach the 42 predicted. (yes it is ambient from up the mast itself, but not that different from the ground at the time

 

image.png.c4d485219e15509237c5229fc1210ac7.png

 

 

 

 

 

 

 

 

it's probably up to 15'C difference. The temp on a watch/head unit is not to measure ambient temperature. It's just the internal temp of the device. Which of course is battery powered and sealed and running electronics.

It is mainly useless as an accurate reader of ambient temp unless it is in a stevenson screen/shaded. You can use it to measure water temp when scuba diving, but that's about the only thing that is useful as an accurate measure.

This is not rocket science, basic meterology. If you want accurate temp, Garmin do have a hardware solution of an external temp sensor, just don;t leave it in the sun.. Not cheap for what it is!

https://navworld.co.za/product/garmin-tempe/

 

HOT (ha ha) tip. Don't put ice and water in your bottles. Just put as many ice cubes as you can. The convection currents in the water melt the ice quicker. Whenever there is a bit of melted water, drink that to keep the ice cubes frozen for longer. (It's the same trick as defrosting a frozen steak in water going way quicker than in ambient air).

 

 

 

Weird hill to pick

Posted
1 hour ago, Shebeen said:

image.png.24236872e6ddf6c5114818a5a7934b33.png

ok, max temp forecast from SAWS was indeed 42, so I will take back my comment that it probably wasn't in the 40s. That is proper hot.

I'm sure there is actual data in the klein karro, but I quickly pulled the reading from the wind mast near prince albert for the day - didn't reach the 42 predicted. (yes it is ambient from up the mast itself, but not that different from the ground at the time

 

image.png.c4d485219e15509237c5229fc1210ac7.png

 

Where does one find these charts? Looked on WeatherSA and they've only got a few PDFs from the previous day.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Settings My Forum Content My Followed Content Forum Settings Ad Messages My Ads My Favourites My Saved Alerts My Pay Deals Help Logout