No Ice On Relief Tube.

[Piloto]

On my way back from KAGC I used twice my relief tube at -20C OAT with no icing at all. I didn't expect urine icing since the urine temp was at 37C. Had no chance of testing Rain-X on ice since never needed to turn on pitot heat. But consistently had a TAS of 170kts at WOT and 2500 rpm. On previous trips with no Rain-X applied I would get 165kts TAS tops. I think Rain-X provides some speed improvement even when flying through cold clouds. 

José

[Jerry 5TJ]

Maybe the additional thrust from the relief tube added a few knots. 

[aggiepilot04]

If you could somehow route your relief tube to the leading edges, you wouldn't need TKS or RainX.

[peevee]

are we seriously going to claim rainx is good for 5kts TAS? Like, really? Next you're going to piss out your piss tube and tell us it's raining.

[Yooper Rocketman]

Glad I'm not the guy pulling your bottom panels off for service or annuals.  I can't imagine that stuff is not getting into every crack, seam, and crevice? I know what leaded fuel and my exhaust stream does to my bottom panels.  It seems every couple years I'm cleaning light corrosion off and repainting another bottom panel.

Tom

[Danb]

Tom I just lost my lunch. Yuck 

[Yetti]

I thought that is why Lycoming designed their engines to leak a little oil to provide the need corrosion proofing for the bottom panels

[201er]

1 hour ago, Piloto said:

On my way back from KAGC I used twice my relief tube at -20C OAT with no icing at all. I didn't expect urine icing since the urine temp was at 37C. Had no chance of testing Rain-X on ice since never needed to turn on pitot heat. But consistently had a TAS of 170kts at WOT and 2500 rpm. On previous trips with no Rain-X applied I would get 165kts TAS tops. I think Rain-X provides some speed improvement even when flying through cold clouds. 

José

What's the freezing point of piss? I bet a little cooler than water. 

What will happen if you pick up external icing on your piss tube? Will you dare fill it up to see if it melts the ice off and risk some backflow?

[FoxMike]

The extra speed maybe a result of lower density altitude in cold weather (engine makes more power).  I have not been to AGC for many years, what kind of shape is it in?  I did my first tour of an approach control facility in the terminal building at AGC some sixty years ago (Boy Scout trip).  Back then approach had one radar with very limited range, a teletype machine and a dozen controllers running around in a small room making flight strips and passing them on.  Back then controllers wore coats and ties to work.

[Piloto]

18 minutes ago, FoxMike said:

The extra speed maybe a result of lower density altitude in cold weather (engine makes more power).  I have not been to AGC for many years, what kind of shape is it in?  I did my first tour of an approach control facility in the terminal building at AGC some sixty years ago (Boy Scout trip).  Back then approach had one radar with very limited range, a teletype machine and a dozen controllers running around in a small room making flight strips and passing them on.  Back then controllers wore coats and ties to work.

I parked at Corporate Air that provided very good service. Unlike KFXE this time of the year my plane was the only one on the ramp. Corporate Air provided free preheat (temp 5F) and help on opening the frozen cabin door (left plane on the ramp overnight). Uber service was quick and only $30 to get me to Plum (45 min. ride) were my son lives. We spend Xmas with my grandson playing in the snow and opening gifts, real good family time.

Happy New Year

José

 

[rpcc]

4 hours ago, 201er said:

What's the freezing point of piss? I bet a little cooler than water. 

What will happen if you pick up external icing on your piss tube? Will you dare fill it up to see if it melts the ice off and risk some backflow?

Hey 201er - just saw your Caribbean videos - very nice work - head down there and don't worry about ice

[Piloto]

4 hours ago, 201er said:

What's the freezing point of piss? I bet a little cooler than water. 

What will happen if you pick up external icing on your piss tube? Will you dare fill it up to see if it melts the ice off and risk some backflow?

Will put some in the refrigerator and let you know. After it leaves the plane it becomes snow flurries with no clouds in the sky, great for ski resorts.

José 

[StevenL757]

I’m going to regret this, but...how did you know the temp of your urine was +37C before you attempted to dump it overboard?

[kpaul]

2 minutes ago, StevenL757 said:

I’m going to regret this, but...how did you know the temp of your urine was +37C before you attempted to dump it overboard?

98.6°F (Average Body Temp) = 37°C

[Jerry 5TJ]

And air you inhale is assumed to be at 37 C in your lungs.  The Alveolar gas law presumes that, I learned right here on Mooneyspace.  

 

[StevenL757]

Thanks guys.  And to think I covered the Alveolar stuff in Aerospace Physiology in college...shame on me.  :-(

[DVA]

Will put some in the refrigerator and let you know. After it leaves the plane it becomes snow flurries with no clouds in the sky, great for ski resorts.
José 

Sublimation is your frozen-piss free tube friend, me thinks.


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