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TOPIC: Speedometers

Speedometers 16 Apr 2019 03:21 #94705

Yup, clear your bench...mine is on the way as well. :)

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Speedometers 16 Apr 2019 00:59 #94701

Great thread. The skill level here is incredible.
My supervisory expertise is expanding daily.....B)
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Speedometers 15 Apr 2019 22:23 #94697

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I'll clear the bench. ;)

BTW, my supply of compression fitting nuts came today. The lathe makes short work of modifying them. I'll send some back with your speedometer.

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Speedometers 15 Apr 2019 21:58 #94692

Hey Rick,
Another Speedo on it's way!
Thanks
Ray

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Ray

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Last edit: by Locomotion.

Speedometers 14 Apr 2019 21:17 #94657

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I haven't used one yet, but have a couple. I want to do a comparison with and without. Just put the dock in yesterday so hopefully it won't be long.

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Speedometers 13 Apr 2019 23:37 #94630

Amazing skills as always, Rick. Your work on the speedometers is amazing!

I'm curious if you've used one of those stabilizing tubes before and what you think of them. Like you, I have a really nice Airguide speedo with the stabilizing tube and pickup, but I've never had one on a boat yet.

BTW, I just sent you a PM regarding my Muskegon speedometers.

- Mark
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Speedometers 13 Apr 2019 20:35 #94623

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OK...so the retaining nuts can be easily fabricated. Looking through my junk drawer I found a couple of 1/8" brass compression nuts (...from a failed project over 30 years ago ...yes, I'm a pack rat.) When the small end is drilled out to .250" They're virtually the same as the Airguide supplied ones:



The only difference is that these are a fine thread and, because of that, are just a bit looser on the clear tubing on my test rig. They hold nicely on the actual air tubing though, and need to be turned on with a wrench. I've got a bunch ordered, so if I have your speedometer I'll send a couple back with it.

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Speedometers 12 Apr 2019 23:41 #94603

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I'd think that as long as the pickup is at least 2" below the bottom, and not in line with a strake, you should have reasonably undisturbed flow. These Airguide sheets have some general installation and care guidelines:



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Speedometers 12 Apr 2019 23:40 #94602

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Ray said with tounge in cheek......."I'll try a compression nut, it's going to take a good connection to stand that much pressure.."

only Ray's set-up would see this kinda pressure.......maybe we need to consult NASA for a special hydraulic fitting to compensate for such forces.......:hmm:

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Speedometers 12 Apr 2019 23:17 #94597

I'll try a compression nut, it's going to take a good connection to stand that much pressure..
I wasn't thinking about the transom angle, it's close to vertical on the transom, a little bow up and it should be right on perpendicular to the water.
Wonder how much turbulence affects these? I would like to keep it as shallow as possible to reduce drag, I guess that will be trial and error.
Thanks, it will be nice to have a gage that I know is calibrated right.

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Ray

"Every man takes the limits of his own field of vision for the limits of the world."
Arthur Schopenhauer

1956 Vagabond I - 50 HP Johnson
1950 Flyer - 50 HP Evinrude
1/2-195something Flash - KG7
1956 Golden Rocket, Sawzall Special
Last edit: by Locomotion.
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