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How fast should I go?

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I am planning my contraption and am wondering what a 'safe' speed is for something running around my yard unattended is. I was leaning toward 10mph, but was thinking that might be a bit fast. I would like to have some input from those who have things driving through their dispay.

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is flying at 9.6 MPH it is really going quite fast. It weights maybe 4 lbs. I have been hit by it and it hurts a lot:p

It's up on the roof out of harms way. The only one that can get hit by it is me...If I was putting it on the ground It would be half that speed, or completely fenced off.

If your thinking of doing a train or something like that with a battery your talking about much more mass and it couuld seriosly hurt an adult or even maybe kill a child:eek:

Be careful!

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Thanks, I will gear it for 5-6mph. I have a 5k ohm pot for the throttle, so I can dial it down a bit if it still looks unsafe. My controller has an input for a brake switch which kills the motor if it is depressed. I will have it set up so that if my bumper/grill contacts someone or something it will stop. One more question, what should I use for batteries. My motor is 24v/400w. My plan was to use the 4 12v scooter batteries I have in a series/parallel combo to get the 24v and longer run time, but 2 of them are bad and need replacing. My other option is to use a couple marine batteries, but they weigh a ton.

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Guest Scot Meyers

Ok so now that you have sparked the curiosity please share.... whats the contraption?

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