rookiepber

I was thinking about using a local cops speed thingy...i think it's called a chronograph...but how do i convert mph to fps? I would like to get it a lil less than 290

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My setup-
Tippman 98 Custom with double trigger, 20 oz tank

xPiZZeRx

I'm pretty sure 280fps. is about 191mph. So, just measure it that way.

And why don't you just buy that handheld chrono?

And why do you have this in air systems?

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MedicDVG

1 mile/hr is 5280 feet in 1 hour, or 5280 feet in 3600 seconds.
That boils down to around 1.46 feet/second.

so 290 feet per second would translate out to the following equation

290 feet | 1 mile | 60 sec | 60 Min
-------------------------------------------------- = Miles/hours
1 sec | 5280 feet | 1 min | 1 hr

Cancel your units, and you get 290 X 60 X 60 / 5280 = 197.7 Miles/hour

So a ball traveling 290 fps = roughly 198 mph

Make sense?

Now doing it the other way (Mph to fps)

198 Miles | 5280 Feet | 1 hr | 1 min
----------------------------------------------- = feet/sec
1 hour | 1 mile | 60 min | 60 sec

cancel you units and the equation is 198 X 5280 / 60 X 60 = 290.4 feet / sec

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xPiZZeRx

^Exactly.

I was right.

280 x 60 x 60 / 5,280 = 190.90 ~ 191mph.

So, if you chrono anywhere inbetween 191 - 198 (mph.), you're in the range of 280 - 290 (fps.).

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Apache

do web search on converting mph to fps found it once looked again couldn't find it

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Tippmann 98c
Response Trigger
Empire Reloader - Smoke - Camo Neoprene cover
14" Smart Parts Progresive Barrel
14" Lapco Big Shot Barrel
Nitro Duck 68ci 4500psi
Premier Expansion Chamber
Double Finger Trigger
Nitro Duck Mega-Reg


Tippmann owner #39

Kuby

its so funny

we have a radar gun (mph) to chrono with

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mid

rockin the shockin

sNoW PIrAnHa

300fps = 204.1 mph. So basically for every 2 mph you get 3 fps.

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xPiZZeRx

1fps. = .681mph.

1mph. = 1.46fps.

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spyderguy15

Or you just do FPS x .682 and save yourself all the trouble (to get MPH)

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MedicDVG

I hate forumulas -- give me a long dimensional analysis problem everytime!! Works great for medical dose calculations!!

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