A Way To Find Valve Stem When Adding Air

[rightrudder]

White tire crayon reference mark for valve stem alignment. But I make sure that both inside and outside sidewalls of tire are marked...that way, when I'm rolling the plane fore/aft by tugging on the prop, I can easily see those inside marks.

And yes, I take all precautions when I move the aircraft by the prop!!

[Kent Ashton]

tire marks using a small template

[Iluke]

I know this is a dumb question, but what tire pressure do you guys run?

[Bud K]

David, I've been looking for a borescope to replace my old dental camera. What type of borescope do you use? And the WiFi box?

[HFS]

I'm using something called "EndoSnake" - primarily made for gun smithing work.

It is completely self contained and relies on getting an "app" for your smart phone for the interface.

Plenty easy to use - even for a dinosaur like me!

HFS

[Roadjunkie1]

Originally Posted by Iluke

I know this is a dumb question, but what tire pressure do you guys run?

Not a dumb question, just off-topic. It's actually a very pertinent question.

I think a lot of it is experimentation but a good start is, in the R-4, main gear: 35 psi. That is a good starting point but can be adjusted up and down depending on mission weight, OAT, runway conditions, propensity for the gear to vibrate, etc. I found changing the pressure made a difference in gear vibration. Going out to a turf runway: 30 or so. I wouldn't go much less than that. I believe you have a -7 about ready to go. Experiment once you get her up in the Test Flight Card numbers..... Think about 35 but that is likely open to debate.........

Rear gear: zero. Solid tire.....

[rv6n6r]

Originally Posted by Bill Boyd

Lecture me if I need it, but it wasn't long into my RV ownership that I simply left off the valve stem cap. There, I said it

I've been tempted to do this but remember that the cap on these tires has an O-ring that can provide some redundancy in the case of a valve stem core failure. Yes it's unlikely, but I also remember it happening to a friend when we were traveling in Canada in our RV-6s, when he landed at one air-carrier airport and had a sudden-ish stoppage on the runway due to a flat. It was subsequently determined to be a valve core failure, and a loose cap. No damage but he wound up blocking the runway with airliners waiting to land. Just something I think about whenever I mess with the cap! Personally I just use a nut driver; it fits okay through the hole in the wheel pant, a little fussy sometimes but works okay.

[NewbRVator]

Originally Posted by Kent Ashton

tire marks using a small template

I like that a lot. My problem is my marks get hard to read in short order.

[NYTOM]

Since your talking about them. I’ve been seeing ads on FB from a company called Diyzit for their duel lens Endoscopy. Self contained with 4 1/2” screen. No WiFi to phone. I have the WiFi type now and it’s a pain. Image jumps and you need the mirror attachment to see the valves in the engine. And sometimes the WiFi looses connection or has trouble connecting at all. Well anyway, if you search Ebay you can get the exact same unit as the Diyzit model only direct from the factory in China and a lot cheaper at about 40 to 50 bucks. Haven’t received it yet but I’ll give a review when it comes in. Those things are really handy in more areas than just the cylinders.