The Square Root of (Total Shaft Horsepower / Weight ) x Constant = Speed
Speed Calculator
Given : (little off topic math check)
RPM=7500 (loaded)
gear ratio = 16.6 : 1
Wheel diameter 1.5 inches
What is the calculated speed in the below units of measurements?
a. inches per second
b. MPH
Robot gearbox
Member BS Pro-Staff and Billbob Pro-Staff
Proud Member of Team Geezer... authorized by: billbob and "G"
The Square Root of (Total Shaft Horsepower / Weight ) x Constant = Speed
Speed Calculator
Fair Winds and Following Seas
Bill H. PTC USN Ret
Chesapeake, Va
Heres how I figuerd it. I think its right bit maybe not. this is calculated on a gear reduction of 16.6:1
pi X 1.5 gives you 4.71 inches per rev. on the wheel
at a 1:1 ratio that would give you 35325 inches per minute @ 7500 rpm
divided by the ratio of 16.6 gives you 2128 inches per minute
which equates to 35.4 inches per second
which equates to 2.01 MPH.
35.4 inches per second with a 2.02 mph speed is my answer. Billy
DANG...well think I'll just stick to the building and redoing instead of the designing....lol. Think I'll delete my post...thats embarrassing! :o lol
"But if serving the Lord seems undesirable to you, then choose for yourselves this day whom you will serve, whether the gods your ancestors served beyond the Euphrates, or the gods of the Amorites, in whose land you are living. But as for me and my household, we will serve the Lord.” Joshua 25:15
Cane Pole, thats the way I remember doing it too. I checked the numbers and thats what I came up with.....well rounding was a little different. I always use pi as 3.14159, cause I don't use a fancy calculator....just a simple one.
J
Isn't deleting your own embarrassing posts an abuse of your moderator powers? :D:D:D
J
did you see the numbers I came up with?? lol
I can do alot of stuff...but math is not one of them!!
Actually if I had the stuff laying in front of me I could figure out what I wanted to do with it or what needed to be done with it...I just use trial and error on paper...lol...instead of the easy smart way like you guys....lol.
And no...not abuse of power...just saving of face...lol...I would do it for you too!!
"But if serving the Lord seems undesirable to you, then choose for yourselves this day whom you will serve, whether the gods your ancestors served beyond the Euphrates, or the gods of the Amorites, in whose land you are living. But as for me and my household, we will serve the Lord.” Joshua 25:15
Trying to beat my own record. The robot in the video runs 32.4 inches per second. You get disqualified if you run off the track or fail to stop for the gate. The track is 1 foot wide and the turn radius (curves) are 6 inch radius.
Accuracy counts. I hope I can stay on the track at 2 mph. Speed kills.:D
This one (video) is front wheel steer. I am trying to build an articulated front wheel steer with an articulated body. Trying to overcome the mass effect some way when maneuvering thru the turns. Ain't easy. Sure is fun.
Member BS Pro-Staff and Billbob Pro-Staff
Proud Member of Team Geezer... authorized by: billbob and "G"
I'll say it again CP...if I only knew half of what's in your head.......lol
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