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-   -   Tale of two tires. New Tires for my RV-12! (https://vansairforce.net/community/showthread.php?t=121154)

rvbuilder2002 01-01-2015 11:01 PM

Quote:

Originally Posted by RFSchaller (Post 946498)
I wonder if the tire spec for pressure is just the max they are rated for by the tire manufacturer as opposed to the recommended working pressure.

I had a bad stem valve on one tire that created a slow leak until I replaced the valve stem - saved some money and hassle there!

Maybe it's just me, but I find it tough to judge the tire pressure state by sight with the wheel pants installed.

Rich

The pressures specified for the RV-12 are based on actual static testing of the landing gear system (I already mentioned the tires and their air pressure are part of that system).

cactusman 01-02-2015 11:55 PM

Has anyone put on Alaskan Bushwheel style tires yet?

RFSchaller 01-03-2015 10:18 PM

Scott,

I understand. The comment was aimed at the difference between what the tire can physically take versus the aircraft mfg recommended pressure.

Rich

Randy 01-04-2015 01:00 AM

Maybe a crazy idea but, Those tire monitor idiot lights on newer cars could have an application in aircraft. I do not know how they work and what is required but there is obviously a bit of a problem with keeping our tires inflated properly. It would be great if those little sending units could actually monitor and display the pressure rather than just alarm when pressure goes below a certain set point.

Randall in Sedona

E. D. Eliot 01-04-2015 01:18 AM

Technology is there
 
The technology to send the operator or pilot the exact tire pressure in each of the tires already exists. My Hyundai Sonata has this feature. Hope it never goes bad as I am told that replacement of these devices is costly!!!

RFSchaller 01-04-2015 09:51 AM

Auto Zone has stem caps with pressure display, but as I recall it was a go-no go indicator for specific pressure. I didn't buy any because I was concerned they might introduce a leak, and with wheel pants I can't see them anyway. They might make sense for folks who don't have wheel pats.

Bill_H 01-04-2015 08:33 PM

On our trailer (the "other" RV) each tire stem has a screw on pressure monitor with a little replaceable coin-type battery in it. They transmit to a cigarette-lighter-plug-in device that shows 4 green LEDS and alarms if one goes low. The low alarm setting is in the on-tire device and cannot be changed. You do not get an actual readout of pressure. The set of 4 was about $50 on eBay, made in China.

Our Jeep Cherokee had inside-the-tire sensors with continuous analog pressure readout plus alarm. Our Ford truck has alarm but no continuous readout. These automotive inside-the-tire sensors have built-in batteries that (in many cases) cannot be replaced, requiring the more expensive replacement of the sensor ($50-$80 each) involving a tire demount-remount. They last 5-7 years and became mandatory about that many years ago, so lots of people are starting to get warnings and finding this out.

The trailer system we have could be easily adapted to a plane. It was sold in two versions, one with alarm set at (if I remember right) about 50psi and the other with it set at 25 psi (not user changeable.) The heads are not that heavy and don't project out very much but they might rub the inside of a wheel pant.

hjd3021 01-04-2015 10:03 PM

Check out this link.
http://www.tirepressuremonitor.com/p...opole-monitor/
I have one of these types setups on my truck and fifth wheel trailer. The sensors mount on the valve stem and weigh 2/3 of an ounce. You set the tire pressure to what you want then install the sensor. It bases its warnings on percent high/low from this starting point. It reads out pressure on the display unit when you advance through the sensors that are installed and give audible warning if values fall out of the high/low range. It has saved me several times with my trailer tires. Sensors battery last 3 years or so then you can send unit in for refurb. Well worth the dollars if it saves on incident.

todehnal 11-22-2016 02:01 PM

Hey John, Any idea why everyone is buying 6 ply tires? As light as we are, I would think that 4 ply would be a better choice.

Thanks...............Tom



Quote:

Originally Posted by Jetguy (Post 946172)
The Tube!:cool:

Trimining the Wheel Pan!



Tire Diameter!
Aero Classic. Inflated.


[

Elite, uninflated.


Jetguy 11-22-2016 03:17 PM

Quote:

Hey John, Any idea why everyone is buying 6 ply tires? As light as we are, I would think that 4 ply would be a better choice.

Thanks...............Tom
Not really sure about the 4 ply.:confused: The original tires are 6 ply so I stuck with that on these. I'm all about less maintenance so I didn't want to go to far from the original setup. I run wheel pans to and a flat tire on landing would ruin them.:eek: and then I'd have to fix it. If I had to guess the 4 ply may puncture more easily. Also there is a weight rating on aircraft tires so check that to. The retreads seem to be holding up very well. I'll have to check to see how many hours I have on them now. Probably over a hundred. Turned out that the hardness of the retreads wasn't a factor on landings. Can't really tell the difference between them and the originals. I run about 30 psi with no problems and check the pressures monthly. ;)


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