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Old 01-13-2015, 12:11 PM   #1
jm2
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2002 25' Safari
1977 20' Argosy 20
northern valley , new jersey
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Airspeed Indicator

Inland Andy,

we're rehabbing our Argosy motorhome dashboard + gauges + instruments.

one of your longstanding suggestions is for having an Airspeed Indicator in a coach. that seem like a really good idea, and we're thinking this one might be suitable - UMA NON TSO 2-1/4 INCH AIRSPEED INDICATORS from Aircraft Spruce

any suggestions as to a recommended pitot tube to use, and a pitot tube location? we don't think we need a heated tube, but are uncertain about keeping the tube safe, and unclogged?

thanks in advance for your ideas!
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Old 01-13-2015, 12:23 PM   #2
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Oxford, , Mississippi
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I'm sure you can find a used one much cheaper on eBay or in TradeAPlane. I'm a pilot so have experience with AS indicators and pitot tubes.
It should should work on a MH, the pitot tube needs unrestriced air flow straight into it. I'd mount the pitot tube anywhere that will give you that. Heaters in them are for when you are flying in clouds, don't think you will be doing much of that. You will need a static vent on the side of the coach for the system to work as that is the "reference pressure". It is called the "pitot-static system". As far as keeping it unclogged,buy a cover for it. Ever notice airplanes on the ramp at the local airport? All will have a red cover with a streamer attached to it on the pitot tube to keep bugs and mud dabbers out. The steamer is to make sure the pilot removes the cover during pre flight as taking off with no AS indicatior is NOT the way to live a long and healthy life.
Wiki has a pretty good write up on the system
Pitot-static system - Wikipedia, the free encyclopedia
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Old 01-13-2015, 12:46 PM   #3
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I am planning on doing the same thing to mine. I already have several air speed indicators. I think they also have altitude built in. I used to work for a company that manufactured them and we had a box of old parts that I went through. They were going to scrap them so I took them home. I would be happy to sell you one providing I can still find them.
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