My 8.8 build thread - Page 21 - JeepForum.com
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post #301 of 307 Old 06-18-2017, 10:35 AM
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Originally Posted by mrblaine View Post
Don't feel too badly, a whole bunch of smart engineers killed some astronauts over the same problem when they launched the Space Shuttle when it was too cold.
On the opposite end engineering solutions, the SR-71 didn't stop leaking fuel until it reached it's normal cruising altitudes.


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post #302 of 307 Old 06-18-2017, 10:39 AM
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altitude or speed to increase the temp ???
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post #303 of 307 Old 06-18-2017, 10:44 AM Thread Starter
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All of this was an attempt to try and fix your ARB leak with more preload, right? Did it fix your leak, mine leaks like crazy when it's cold, the compressor never stops, but after driving it a bit and warming up, it doesn't leak at all.
No idea and won't know for at least a couple weeks before I get out on the trails. Schedule is pretty tight but also something new showed up which I need to look into.

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post #304 of 307 Old 06-18-2017, 10:45 AM
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Altitude as I understand it. The plane needed to contract from the cold in order to seal the fuel compartments. I'm sure there are other less visually dramatic areas that suffered from the same problem. It was built to perform in a certain extreme environment that doesn't exist on the runway or where most normal aircraft travel.

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post #305 of 307 Old 06-19-2017, 11:18 AM Thread Starter
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Don't feel too badly, a whole bunch of smart engineers killed some astronauts over the same problem when they launched the Space Shuttle when it was too cold.
From what I recall, engineers (specifically one) had been warning that the Challenger had an inherent flaw in the o-rings and low temperatures and had been predicting at some point they were going to get a failure. NASA waved a hand stating this is all theoretical and continued anyways
Details are fuzzy though

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Altitude as I understand it. The plane needed to contract from the cold in order to seal the fuel compartments. I'm sure there are other less visually dramatic areas that suffered from the same problem. It was built to perform in a certain extreme environment that doesn't exist on the runway or where most normal aircraft travel.
I thought it was the opposite where the plane has to heat up sufficiently from the speeds it reaches to seal everything up.
I remember reading the Russians knew the shape of the plane when they had a spy satellite fly over with thermal imaging and picked up the difference in heat radiating off the ground from where it had been parked shortly before on the tarmac.
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post #306 of 307 Old 06-19-2017, 11:40 AM
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From what I recall, engineers (specifically one) had been warning that the Challenger had an inherent flaw in the o-rings and low temperatures and had been predicting at some point they were going to get a failure. NASA waved a hand stating this is all theoretical and continued anyways
Details are fuzzy though
The engineers basically said "we didn't analyze for those conditions," which means they never expected anyone to operate under those conditions because they were already so far beyond unsafe. The management didn't understand that this meant really bad stuff, so they thought it was safe enough to operate. If the engineers had better communications skills, they would have yelled no with a few f-bombs thrown in and gotten their meaning across.
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post #307 of 307 Old 06-19-2017, 12:09 PM Thread Starter
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Originally Posted by rikkards View Post
From what I recall, engineers (specifically one) had been warning that the Challenger had an inherent flaw in the o-rings and low temperatures and had been predicting at some point they were going to get a failure. NASA waved a hand stating this is all theoretical and continued anyways
Details are fuzzy though
The engineers basically said "we didn't analyze for those conditions," which means they never expected anyone to operate under those conditions because they were already so far beyond unsafe. The management didn't understand that this meant really bad stuff, so they thought it was safe enough to operate. If the engineers had better communications skills, they would have yelled no with a few f-bombs thrown in and gotten their meaning across.
Yeah sometimes subtlety is not always the best option.
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