speedos

[omc-v4]

Hi Sam
Just wondering if yo got achance to look at my Kellers?

[Mark75H]

Oooops, I forgot what was in that box from you. Maybe I can do it while I'm watching it rain on Friday. I know I'm not going for a boat ride Friday:(

[Psyco]

Mark,the thought of you lounging around the house in another man's speedo's is creepy. I hope he washed them before he sent them to you.:p

[omc-v4]

hi sam are you going to be able to save them?

[omc-v4]

what the skinney on the spedos?

[Mark75H]

They are done. You can get a new face for the black one from Steve Greaves:

http://www.portagebaysystems.com/marine/products32.htm


The 40 to 80 mph black one is pretty accurate until 75 mph. It shows slower than correct above 75. When it says 80 you'd probably be going 86 or so.

The blue faced 40-100 isn't too good below 55 mph, it shows a little slower than correct until you are over 50. 50 to 75 is a good range.......80-88 shows a little slow (3 mph) but it is correct again at 90 to 100.

Do you want me to send them back to you or do you want me to send them to Steve Greaves for you?

[Mark75H]

I don't have the pressures for air pitots, only water

the fomula is:

speed in mph = the square root of: psi ÷ .0145


one that is easy to remember: 69 mph = 69 psi

which also means......if you fall out at 70 mph, your whole body can be supported by 3 or 4 square inches of water.......ouch!

I'm post a bunch of the numbers tomorrow

[omc-v4]

if you dont mind send them steve ? let me know so i can send $ for what you did and frieght to steve.

[LakeRacer99]

Hey Sam, what exactly are you doing to calabrate these Kellers? If you don't mind saying.
I didn't think there was any difference between air pressure and water pressure. Remember that your speedo most likely never gets water to it as it has about 20ft of hose filled with air to compress first.
I am just curious.
Thanks,
Jason