RC-Monster Forums - View Single Post

Serum · 07.04.2006, 12:45 PM

I think you need way more power than 16 cells to reach the 80mph. But you won't reach a record with an 80 mph car.. this is an average, so you need to peak to a higher speed as well. Lets say it takes you 2 seconds to get to that speed. meaning less time to do the 1/3rd mile.

you say 14.2 in 1/3rd of a mile, so 42. equals 1 mile. 3600 seconds equals 1 hour, so 3600/42.6=84.5 mph. (again, average)

you are going to need a lot more cells and a perfect flat road to keep it going straight.

I don't want to burst you bubble in what way ever, but i think you need at least an 8S flightpower 3700 pack. They stay above 3.1V@50C discharge peak. which means that one single cell can deliver 573W. So 8 of them can do 8X573W peak. that is a rough 4500 watts of energy. that's more like it, but still i think it will be very hard to get the speed record done.

that in combination with an MGM 24160 would be a nice combo and a 9L won't pull that sled a 2240 would be a nice motor to use.

The problem is, you don't only need speed, but you have got limited time getting to that speed! and that is the reason why you need all that power!

	(#5)
Serum RC-Monster Admin Offline Posts: 10,480 Join Date: Feb 2005	07.04.2006, 12:45 PM I think you need way more power than 16 cells to reach the 80mph. But you won't reach a record with an 80 mph car.. this is an average, so you need to peak to a higher speed as well. Lets say it takes you 2 seconds to get to that speed. meaning less time to do the 1/3rd mile. you say 14.2 in 1/3rd of a mile, so 42. equals 1 mile. 3600 seconds equals 1 hour, so 3600/42.6=84.5 mph. (again, average) you are going to need a lot more cells and a perfect flat road to keep it going straight. I don't want to burst you bubble in what way ever, but i think you need at least an 8S flightpower 3700 pack. They stay above 3.1V@50C discharge peak. which means that one single cell can deliver 573W. So 8 of them can do 8X573W peak. that is a rough 4500 watts of energy. that's more like it, but still i think it will be very hard to get the speed record done. that in combination with an MGM 24160 would be a nice combo and a 9L won't pull that sled a 2240 would be a nice motor to use. The problem is, you don't only need speed, but you have got limited time getting to that speed! and that is the reason why you need all that power!