Well i have know idea where to post it but i was thinking of geting a speedometer for my banshee then i thought bout a gps how do these things work and such ?

 

They work like this....
They will need to see as few as 3 satellites to triangulate your position. 4 satellites to give you altitude. most require atleast 3 to lock to give you a speedo. some of the newer ones require 4. the more satellites and can track at once the more it is going to cost you. color displays will also increase the cost. every gps is effected by tree cover and obstuctions... they work on line of sight. once they are locked you can lose sight of the satellites for a brief period before it will start researching again. i have a couple of them one wont run on batteries at all the others will only last about 2 hrs on batteries. they all have cig lighter adapters but for hooking them up on a banshee I am unable to answer that one.

 

Ive got an etrex legend on my raptor and I love it. I think I burned it though..the + cable from the cig adapter was a bit loose and caused it to short before the damn fuse blew [img]i/expressions/face-icon-small-sad.gif[/img] Good thing Ive got a 2yr replacement warranty on it! If you want to mount it on your banshee, just get re-chargable batteries and carry a couple of them in your pocket or camelpak.

 

The only problem with using a gps for a speedo is that the calculation for your speed is based on an average calculation based on your distance traveled between two intervals. (D/T=S) Because of this, the length of interval affects your speed. Also... Satellite triangulation is only accurate within ~1.5m meaning that your distance measured for your calculation could be as much as 5 ft off. That would mean that a gps calculating speed on an interval of 3 sec (this is about average for most gps's. Nicer ones use smaller intervals, cheaper ones use larger) that was off by five feet being used to calculate the speed of a vehicle moving 20 mph would be shown to be traveling 17 mph or 23 mph giving the instrument a margin of error of 15% at 20 mph.

If speed is all your interested in... I would recommend a speedometer such as trailtech that bases its calculations off of wheel speed. Its still not a great system but its a better one.

~HoundDog

 

easy answer....dont get lost then you wont need a gps....get a Trail Tech Endurance speedo...tells you riding hours, distance traveled, average speed, max speed, current speed, and maitnence reminders all for 75bucks..i have one on my raptor and the speed is on the dot in accuracy...