FS: Keller 50-80mph Speedo

[Guest]

Were still racing

Next spring we will test with them and see how they compare with our GPS.

Alan

[Yellowjacket]

What is also intresting I found the keller calibrationb info on two of the units.

Alan,

Could you post the cal data for the two units? Curious as to what they were using for a inlet loss factor. I have an old Keller that has a pitot similar to one of the first pics (it's almost round) and some of the others I have seen have a pitot that is more like the thinner, hollow blade, like one of the ones you have. It appears that Teleflex uses a .966016 factor (3.4% total pressure loss) (30 mph - 12.6 psi) for their units, and I'm curious as to what Keller used.

Thanks,

Manny

[krazy karl]

I acquired one about a year ago that goes from 30 to 60 which I plan to use on my ASR. I never got a chance to try it this past year, but I had planned on comparing it to a GPS and then make a correction factor if necessary. If it can be calibrated that would be even better.

I figured using this would be easier in testing as I have had issues with my GPS blanking out during a run more often than not, wasting a run and a bunch of time. If I could put the GPS on the dash and see it while running then I wouldn't bother with the speedo, but I have to put the GPS where it is cushioned from shock, necessary in a runabout. Then I can't watch it to get real time numbers anyway. It will still blank out when tucked away.

I guess I could invest in a better GPS but I figure I can get the info from a Keller speedo for a lot less money. I would also want to test to see how much is lost through drag from the pitot tube. I need another for my CSR that goes a bit higher.
kk

[Jack Stotts]

Alan, I'll use your address that's in the NBRA rule book on Dogwood Dr. I'll mail it tomorrow (FRI). Jack

[Guest]

Keller

Thanks Jack,
Send out the check also tomorrow.

Alan

[BmJuby]

Still looking for a 40-70mph Keller Speedometer (with everything: pitot tube, pressure line, and both brackets all fittings)

Thanks,
Brandon

[blueskyracer]

I acquired one about a year ago that goes from 30 to 60 which I plan to use on my ASR. I never got a chance to try it this past year, but I had planned on comparing it to a GPS and then make a correction factor if necessary. If it can be calibrated that would be even better.

I figured using this would be easier in testing as I have had issues with my GPS blanking out during a run more often than not, wasting a run and a bunch of time. If I could put the GPS on the dash and see it while running then I wouldn't bother with the speedo, but I have to put the GPS where it is cushioned from shock, necessary in a runabout. Then I can't watch it to get real time numbers anyway. It will still blank out when tucked away.

I guess I could invest in a better GPS but I figure I can get the info from a Keller speedo for a lot less money. I would also want to test to see how much is lost through drag from the pitot tube. I need another for my CSR that goes a bit higher.
kk

Karl we have found that if you tuck some paper towel pieces around the batteries to make them more snug you will eliminate a lot of the black outs..