Save me a trip to the airport (tire question)

[Tim-37419]

I saw a Cirrus getting towed off the runway last weekend and it reminded me that I haven't bought any spare tubes for my new to me J model.

 

I checked the parts catalog but couldn't find the tubes. If someone could be so kind to save me a trip to the airport I'd appreciate it.

 

I'm 99% certain the nose wheel has a 90 degree stem, what about the mains?

 

Thx!

 

Tim

[Tim-37419]

Found my own answer after a second search.

 

90 degree on the nosewheel

Straight on the mains.

 

I'll leave this thread here for the next person who needs this.

[A64Pilot]

With what tubes cost I’d wait until I needed tires then the old ones are the spare, or I guess buy two spares and use them when you do get tires, but read up on how to best store them because they do go bad. I think best put in a zip loc bag coated in talc and keep out of sunlight. I’ve heard but can’t verify tire talc is different than baby powder.

I’ve also heard if your a welder and have it anyway to flush the zip loc bag with Argon. Yeah I know but if you happen to have it anyway why not?

Dont lose the yellow metal caps, you need them and they are stupid expensive for what they are, don’t use plastic caps, the metal ones have an O-ring and are a back up if the valve starts to leak.

[Fly Boomer]

2 hours ago, A64Pilot said:

Dont lose the yellow metal caps, you need them and they are stupid expensive for what they are, don’t use plastic caps, the metal ones have an O-ring and are a back up if the valve starts to leak.

Only good up to 5,000 PSI.

[Hank]

29 minutes ago, Fly Boomer said:

Only good up to 5,000 PSI.

My compressor won't go that high . . . .

[N201MKTurbo]

17 hours ago, Hank said:

My compressor won't go that high . . . .

I have two compressors in my garage that will...

[Fly Boomer]

1 hour ago, N201MKTurbo said:

I have two compressors in my garage that will...

Okay, I have to ask -- why do you have a 5,000 PSI compressor?

[N201MKTurbo]

12 minutes ago, Fly Boomer said:

Okay, I have to ask -- why do you have a 5,000 PSI compressor?

One is an old scuba compressor that I rebuilt. It works great and makes sweet air.

The other one is a Haskel air driven oxygen compatible compressor that will go to 15000 PSI. I use it to fill my oxygen bottles.

[Fly Boomer]

2 hours ago, N201MKTurbo said:

One is an old scuba compressor that I rebuilt. It works great and makes sweet air.

The other one is a Haskel air driven oxygen compatible compressor that will go to 15000 PSI. I use it to fill my oxygen bottles.

Well, you don't hear that every day.

[A64Pilot]

18 hours ago, N201MKTurbo said:

One is an old scuba compressor that I rebuilt. It works great and makes sweet air.

The other one is a Haskel air driven oxygen compatible compressor that will go to 15000 PSI. I use it to fill my oxygen bottles.

I’ve used Haskals to fill deco bottles and mix tri-mix and didn’t think they could go anywhere near that high, Oxygen cylinders from memory are usually only 2,000 PSI? 

I think those of us who used to fill our Deco bottles higher were actually I think doing something illegal? Above some number O2 became unsafe somehow?

I looked it up, apparently there is a two stage Haskell that can go to 20,000 PSI, what in Gods name could you do with that much pressure? What could you put it into? 

[N201MKTurbo]

1 hour ago, A64Pilot said:

I’ve used Haskals to fill deco bottles and mix tri-mix and didn’t think they could go anywhere near that high, Oxygen cylinders from memory are usually only 2,000 PSI? 

I think those of us who used to fill our Deco bottles higher were actually I think doing something illegal? Above some number O2 became unsafe somehow?

I looked it up, apparently there is a two stage Haskell that can go to 20,000 PSI, what in Gods name could you do with that much pressure? What could you put it into? 

By setting the drive air pressure, you can limit the output pressure. Just because it is capable of doing 15000 PSI, doesn’t mean you have to. The highest I’ve ever gone with it is 2300 PSI. I bought it so I can use a single supply cylinder for filling my O2 bottles. Plus I can always fill them full. I can fill  my 23 cu ft cylinder to 2300 PSI with the supply cylinder at 250 PSI. It takes a while when it’s that low, but it will do it.

Ive never made NITROX, but with a few fittings I could.

[A64Pilot]

1 hour ago, N201MKTurbo said:

By setting the drive air pressure, you can limit the output pressure. Just because it is capable of doing 15000 PSI, doesn’t mean you have to. The highest I’ve ever gone with it is 2300 PSI. I bought it so I can use a single supply cylinder for filling my O2 bottles. Plus I can always fill them full. I can fill  my 23 cu ft cylinder to 2300 PSI with the supply cylinder at 250 PSI. It takes a while when it’s that low, but it will do it.

Ive never made NITROX, but with a few fittings I could.

Nitrox is just enriched air, it’s easy.

Biggest reason for a Scuba shop to have a Haskell is Tri-mix, helium isn’t cheap and with a Haskell you can take a helium bottle down to 150 PSI , again from Memory.

I know how a Haskell works, but I wonder what kind of gas needs compressing to those high numbers, and why.

Pic is of me hauling Helium T bottles in my Maule for deep diving. Try getting those in a Cessna  

[N201MKTurbo]

27 minutes ago, A64Pilot said:

Nitrox is just enriched air, it’s easy.

Biggest reason for a Scuba shop to have a Haskell is Tri-mix, helium isn’t cheap and with a Haskell you can take a helium bottle down to 150 PSI , again from Memory.

I know how a Haskell works, but I wonder what kind of gas needs compressing to those high numbers, and why.

Pic is of me hauling Helium T bottles in my Maule for deep diving. Try getting those in a Cessna  

The local cylinder shop uses a Haskel to hydro cylinders (they don’t need it for most). They get cylinders to hydro test that are up to 12000 PSI. Missiles and spacecraft have high pressure bottles to power their mechanical systems and cool their sensors that run at XXXXX PSI. I know the number but it is ITAR. They are all filled with a Haskel.

[A64Pilot]

I’ll skip the missile thing but I know many have compressed gas, the Hellfire was steered by compressed nitrogen, but the hydro’s I’ve seen were hydraulic, hence the name. I think they take a bottle to 5/3 rated pressure and measure it’s expansion, so it has to be hydraulic. 

I’ve seen an aluminum tank burst, very anticlimactic, just a cracking sound and some water spray, because it’s full of water and that’s incompressible the instant the tank let’s go pressure drops to nothing. The one I saw the neck broke. I was told it’s very rare for them to break one, most fail because they expand more than allowed.

[N201MKTurbo]

Our cylinder shop doesn’t fill the cylinders with water, they say it takes too long, so they just use compressed air. They do over 1000 cylinders a day. I told them that sounds dangerous. They said they only had one in the the last 20 years explode. It didn’t hurt anybody, but did take their roof off.

The one that exploded was from the AFB and they put a 2500 PSI cylinder in with a batch of 10000 PSI cylinders and the operator wasn’t checking each one and ran the 2500 Lb cylinder to 15000 PSI. He said it ruptured at 11000.

[A64Pilot]

They are supposed to measure how much the cylinder expands, it’s not a if it doesn’t explode it passes test, only way to do that I’m aware of is to measure how many cc’s of liquid added it takes to get to test pressure. Busting a tank is very rare, but there was a series of aluminum SCUBA tanks that used an incorrect alloy that are now outlawed, that was what I saw bust, before they were outlawed anyway.

6351 alloy is bad, 6061 is good. I’m not sure they are outlawed but any good shop won’t fill them.

http://www.tymsinc.com/hydrostatic-faq.html#:~:text=A “hydro test” is an,measured%2C recorded%2C and analyzed.

I don’t see how they could measure expansion with a compressed gas, but it doesn’t sound safe. Hope they don’t hurt themselves.

 

Edited June 18, 2023 by A64Pilot

[N201MKTurbo]

6 minutes ago, A64Pilot said:

They are supposed to measure how much the cylinder expands, only way to do that I’m aware of is to measure how many cc’s of liquid added it takes to get to test pressure.

http://www.tymsinc.com/hydrostatic-faq.html#:~:text=A “hydro test” is an,measured%2C recorded%2C and analyzed.

I don’t see how they could measure expansion with a compressed gas, but it doesn’t sound safe. Hope they don’t hurt themselves.

 

They measure the displacement of the water outside of the cylinder.

[A64Pilot]

Video of someone busting one intentionally with excessive pressure

 

 

Edited June 18, 2023 by A64Pilot

[A64Pilot]

video of how they usually fail, this guy was foolish I think, because while benign, I’m still not putting my hands and face there

 

Edited June 18, 2023 by A64Pilot

[A64Pilot]

15 minutes ago, N201MKTurbo said:

They measure the displacement of the water outside of the cylinder.

I can see how that would work, but I’m not getting in the same building where that’s going on.

[N201MKTurbo]

2 minutes ago, A64Pilot said:

I can see how that would work, but I’m not getting in the same building where that’s going on.

I hear you, and I was thinking the same thing, but they have been doing this for like 50 years and they are one of the biggest cylinder shops in the southwest.

https://allsafe.net

They used to be called Thunderbird Cylinder. The owner was getting old and sold it a couple of years ago. The name is kind of ironic.

[Hank]

22 hours ago, A64Pilot said:

Nitrox is just enriched air, it’s easy.

Biggest reason for a Scuba shop to have a Haskell is Tri-mix, helium isn’t cheap and with a Haskell you can take a helium bottle down to 150 PSI , again from Memory.

I know how a Haskell works, but I wonder what kind of gas needs compressing to those high numbers, and why.

Pic is of me hauling Helium T bottles in my Maule for deep diving. Try getting those in a Cessna  

You think getting them in a Cessna would be difficult? Load them in your Mooney . . . . .