Bryan Becker From United States of America, joined Mar 2001, 333 posts, RR: 0 Posted (13 years 4 months 22 hours ago) and read 1811 times:

Is there a way to take fps that a plane or object is going and find out what the speed is of the plane or object. it would realy help me out.THANKS!!!!!!

Sabenapilot From Belgium, joined Feb 2000, 2714 posts, RR: 46
Reply 1, posted (13 years 4 months 22 hours ago) and read 1745 times:

Hey, have you ever been to school or what?

Anyway, the conversion factor is around 2!!!

for instance: wind is reported to be 10 meters per second (done so in Eastern Europe). How much is that in knots? Answer: 20 kts!

You want the prove of this?
10 MPS
= 36000 MPH (since there are 3600 seconds in 1 hour)
= 36KMPH (since there are 1000 meters in 1KM)
= 20 KTS (since 1KT = 1NMH and 1NM = +/- 1.8KM)

Prebennorholm From Denmark, joined Mar 2000, 6424 posts, RR: 54
Reply 3, posted (13 years 4 months 22 hours ago) and read 1734 times:

Bryan, one statute mile is 5300 feet (roughly, the exact number you will have to ask an American about, I never use feet and I never use miles).

An hour is 3600 seconds - exactly - that counts in metric countries too!

So take your fps, divide by 3600, multiply by 5300, and the result is mph - roughly. Or multiply by 1.47 (5300 / 3600) - roughly, even more so.

If on the other hand you want to convert knots (nautical miles per hours), then one Nm = roughly 6080 feet, so the factor becomes roughly 1.69 instead.

You might also go metric and measure speeds in m/s or km/h. Then the factor is 3.6 - not roughly, but exactly! And all your troubles would be gone.

Best regards, Preben Norholm

Always keep your number of landings equal to your number of take-offs, Preben Norholm

Prebennorholm From Denmark, joined Mar 2000, 6424 posts, RR: 54
Reply 6, posted (13 years 4 months 20 hours ago) and read 1710 times:

Tnx a lot Greg. As a metric guy I had to walk around a few metric conversions, and my rough figure came out at 5292.7631 feet. I will try to remember 5280, at least until tomorrow.

I counted one foot as 0.304 m, but 0.3047 m is a better value. Must be since I know that a yard (3 feet) is pretty close to 0.914 m. It would have landed me on 5280.6038 feet.

Happy landing, Preben Norholm

Always keep your number of landings equal to your number of take-offs, Preben Norholm

Flight152 From United States of America, joined Nov 2000, 3393 posts, RR: 6
Reply 11, posted (13 years 3 months 4 weeks 1 day 23 hours ago) and read 1668 times:

Bryan Becker From United States of America, joined Mar 2001, 333 posts, RR: 0
Reply 12, posted (13 years 3 months 4 weeks 1 day 21 hours ago) and read 1665 times:

Well out in Mesa they don't,I know people that are out of school and did not know how to do it,and yes I am in school!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Thanks experts!!!!!!!

Max Power From , joined Dec 1969, posts, RR:
Reply 14, posted (13 years 3 months 4 weeks 23 hours ago) and read 1651 times:

Ahhh, give Bryan a break. Just a little one? We were all absent from one time to another in school, maybe he was absent the day they talked about that? You know, if you take the speed of a .45Cal. bullet in FPS which is close to 700FPS and figure it into MPH you should come close to the speed of a fast jetliner with a fair tail wind? Max.