Hi all.
Ron, you say the ice is good. I thank you for your report.
I would like to know what good is. How many inches of blue ice is there. Blue ice is the only ice you should consider when measuring and use when determining what that ice will support. there is a chart available that determines what the ice will hold. This chart is based on the thickness of the ice is and what the temperature is. I do not have the chart but will do my best to get it and post it here. I used to fly in the bush and used aircraft that weighed as little as 3500 lbs to 116,000 pounds. To say the least we were very diligent in our efforts to establish good ice. As some poster's have said ice is not allways the same thickness, even ten feet away from your hole. We would drill holes the full length of the landing area and the area we would use for loading and unloading and then mark the safe area with little pine trees, or in the case of the Arctic green garbage bags full of snow. We would also check to make sure by random samplingas winter wore on and spring arrived.
In the North Ice Roads are also common and the same techniques are used. In my years in the North I have seen many Aircraft and Vehicles go through what was supposed to be good Ice. As an anecdote I will tell a little storey.
I was asked to take a 26,000 lb A/C to Sandy Lkae, Ontario and was told the ice was good. I asked if anybody had measurements and was told NO. I said I will take the 3500 lb A/C and drill holes to test it. The expense would have been about 300.00 bucks. The boss said no and then I said no. The new plan was to use a 12,000 lb A/C. The 12,000 lber went through the Ice on landing. Nobody was hurt and we recovered the half sunk A/C with a stroke of luck.
The morale of the storey is that good ice can only be determined with proper care. Blue Ice is the only ice that matters and temperature must be considered as well. Just because you see somebody out on the ice does mean it is good ice, nor does it mean the ice between you and them is good. Ice is dynamic, it changes all the time. When Ice goes in the spring it goes from the bottom not the top which means that even if it is cold outside the ice is deteriorating from underneath. It could be from the water turning over or from water running in from creeks and rivers. I could go on but I won't. Be safe the Ice season is early.
One more thought.
So I see 30 people out on the ice, they are close together, and think,Hey it must be good ice. What if the ice those 30 people are on can only support 30 people. I walk out and guess what? the Ice really can only hold 30 people, not 31.
There really is alot more to Ice than most of know, Me included.
Clark
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