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Old 02-16-2005, 05:50 PM   #16
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Is there a particular reason every thread this guy ajg starts becomes a bash session, im rather confused about that?

About the radar gun acuracy, they seem to have no problem telling a ballpark that the pitch was 88 miles per hour. A baseball and micro are about the same size when looking at the front, so it would work fine dont you think?
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Old 02-16-2005, 06:10 PM   #17
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Quote:
i thought radar guns werent that accurate for 1/10 cuz the waves dont have enough patch to bounce off of

isnt a baseball smaller then an rc car??? if it can measure them i think it can measure rc...
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Old 02-16-2005, 06:40 PM   #18
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Quote:
Originally posted by burbs
isnt a baseball smaller then an rc car??? if it can measure them i think it can measure rc...
Good point!
By the way, Go SF Giants!!
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Old 02-16-2005, 06:41 PM   #19
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Quote:
Originally posted by greencactus3
lol i just gotta say this. are you positive its accurate? i personally have never gotton a ticket but ive had friends pulled over being told they were going 10 over when they were going like 2 over. and rain should accelerate at -9.8m/ss so other than wind, it might be falling faster. or wind could be slowing it, or oh i just noticed, then in the rain, radar guns dont work on cars? is that it? huh? lol. not being mean or offensive. just i find it funny.
Hpw do you know his speedo was accurate.... I clocked rain, it read 12mph... Yes, radar works in the rain.... When it's pouring and your bored cause it's quiet out you'll do strange things....

This should be moved out of this forum anyway....
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Old 02-16-2005, 06:49 PM   #20
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well i removed it but yea, sorry. its just sumthing i read sumwhere. and about the rain, well what i meant was since you get reflections of the rain itself, would the readings of a speeding car be accurate in rainy weather? i dont know exactly how radar guns works so who knows but this sonar 'gun' we use in physics class gets distracted REAL easily. and yea, never thought about the gun measuring baseballs. might be i never liked baseball but thats besides the point. sorry if my posts are lame this week, have nothing better to do right now as its break and no school, dont wanna do hw, and i have little money. lol
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Old 02-16-2005, 06:49 PM   #21
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Quote:
Originally posted by vtl1180ny
Hpw do you know his speedo was accurate.... I clocked rain, it read 12mph... Yes, radar works in the rain.... When it's pouring and your bored cause it's quiet out you'll do strange things....

This should be moved out of this forum anyway....
I think his point was: If you can clock the rain, how can you clock cars when it's raining? You'd be clocking the rain instead of the cars.
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Old 02-16-2005, 06:53 PM   #22
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Last edited by burbs; 02-16-2005 at 07:48 PM.
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Old 02-16-2005, 07:32 PM   #23
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Quote:
Originally posted by Potato
I think his point was: If you can clock the rain, how can you clock cars when it's raining? You'd be clocking the rain instead of the cars.
exactly
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Old 02-16-2005, 08:26 PM   #24
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Quote:
Originally posted by Potato
I think his point was: If you can clock the rain, how can you clock cars when it's raining? You'd be clocking the rain instead of the cars.
Rain is falling down.... I had to take the gun and point it up to get a reading, ie dopler effect.... If you have no movement you have no dopler shift... the object must be moving in a horizontal plane, not vertical... Rain falls vertical....

Hence my point was I was able to clock rain.... You can clock a baseball... hell, I've clocked bicyclist....
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Old 02-16-2005, 08:40 PM   #25
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Quote:
Originally posted by primusblowsgoat
How acurate do you really need to be.

All you really want is an idea dont you?

mark out some distance, time how long it takes to get from start to finish, calculate speed. shouldnt be to hard
I agree, it shouldn't be hard to calculate. . . . Speed = Distance/Time.
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Old 02-16-2005, 09:24 PM   #26
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come on guyz......didnt you learn this in 8th grade??!?!?!?!

set a distance........and time it from start to finish.....DISTANCE=RATE multiplied by TIME so DISTANCE DIVIDED BY TIME! and u have ur SPEED
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Old 02-27-2005, 07:28 PM   #27
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so how fast did you say it could go?
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Old 02-28-2005, 03:23 AM   #28
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You may be interested to know that the latest AMB system allows split time measurements and the implementation of speed traps. It indeed uses the split time over a set distance to calculate the average speed over that distance. The system is in use at the MACH track in Heemstede (the track Serpent NL and XRay NL use as their primary test track). Near the end of the straight are two counting loops 9 meters apart. With Electric touring cars Jilles and I managed topspeeds in excess of 80Kph during normal 5 minute runs.
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Old 02-28-2005, 03:53 AM   #29
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Yeah.......

I used to get the mph of my car when I raced at Fantasy World using the AMB system. But that was only track speed.... per lap. He is trying to get a max speed run. And some of us know where this is headed.......


AGJ, hey I never tried that out; It might be a good idea, so I'd give it a try if I was you. Besides, forking out 200 to 300 dollars on a radar system that you really gonna use once in a certain application (any other time it will be used for nonsense), is quite far fetched, if you ask me.....
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Old 02-28-2005, 08:23 AM   #30
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Quote:
Originally posted by GundamWZero
[B]Yeah.......

I used to get the mph of my car when I raced at Fantasy World using the AMB system. But that was only track speed.... per lap.
I was talking about top speed. The new AMB system allows the use of multiple timing loops on different parts of the track. The Heemstede track currently has three. Two of these are on the straight only 9 meters apart. The split time between these two loops gives the average speed over this 9 meter distance at the end of the straight. So I am talking about top speed, not average lap speed.

The Heemstede timing info is also available on the internet on the http://www.mylaps.com website. If you look under the "Live" section you get live access to laptimes from many circuits including Heemstede, several karting tracks etc.

This is one of my runs:

Sessie 7 gestart om 16:28:21
Beste tijd 18.295 (54.7 Km/h) Totale tijd 0:05:37
In Ronde 14 Ronden 18 (5.0 Kilometers)


Totale tijd Sec.1 Speed
km/h Sec.2 Rondetijd 5 55
- Start sessie
1 0:00:18 7.225 80.3 10.784 18.457
2 0:00:36 7.150 76.8 10.756 18.374
3 0:00:57 7.255 76.6 13.399 21.124
4 0:01:16 7.222 76.5 10.686 18.379
5 0:01:34 7.216 76.1 10.637 18.327
6 0:01:53 7.255 77.2 10.628 18.349
7 0:02:11 7.284 76.9 10.676 18.429
8 0:02:29 7.146 77.9 10.740 18.349
9 0:02:48 7.197 76.1 10.666 18.335
10 0:03:06 7.324 76.1 10.677 18.474
11 0:03:25 7.309 75.9 10.776 18.559
12 0:03:43 7.348 76.5 10.679 18.497
13 0:04:02 7.321 75.3 10.646 18.445
14 0:04:20 7.254 74.8 10.560 18.295 Beste tijd
15 0:04:38 7.366 74.3 10.724 18.574
16 0:04:57 7.327 74.4 10.728 18.539
17 0:05:16 7.596 73.0 10.957 19.046
18 0:05:37 8.041 65.8 12.601 21.189

Note that top speed on the first lap was 80.3Kph. Average speed for the run was 54.7Kph.
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