Forum: Technology

Elite 1K Joined: May 26, 2005 - 08:39 PM Posts: 1496

What composite material is that? The magical stuff you've conjured up in your head to fit your fantasy? Very Happy

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mustang65 wrote:

No there are not any C models that I know of that have 229 engines, but with the composite material it would lighten the load of the Eagle and allow the Eagle to get to 1875mph safely and quickly for five minutes.

You've still never addressed the issue of what to do at the end of this high speed flight. You've got 2 dilemmas, fuel and excess heat. The Eagle is not only capable of flying faster than it's construction materials can withstand for prolonged periods, but it will run out of fuel quickly doing so. The question then becomes in this time/force battle, will I run out of gas before I do irreparable damage to my aircraft? The next question is what was the point of the exercise?

With the composite material the heat won't be an issue because it will be put on the hot spots of the airframe so that should allow you to go 1875mph for five minutes with a problem. As for the fuel you could attach one tank under the bottom cost up to the tanker with the tank refuel again then get to 45000 feet hit A/B then once the tank has been depleted drop it and that should give you the safety barrier you need to get to a base or tanker, and have multiple tries if you fail the first time. Plus the composite material is lighter than metal so it would save weight which means the Eagle could get to top speed faster. The Carbon fiber won't break either since the eagles nose is made of it and it has to take the same amount of stress as the rest of the plane during high g turns.

The theory might hold up in high altitude flight. You definitely don't want to operate these plastic planes down low or through the clouds, especially volcanic ash lined clouds. Water droplets violently corrode and pockmark composite skins. Fine volcanic dust is a hundred magnitudes the problem. I'm not so sure rugged and K-I-S-S designs based on the more classic metals don't still have a role into the future.

Fine volcanic ash, water droplets, bah. Nothing 3M can't tackle?

Besides they don't make alloys like they used to I bet there is an aluminum alloy out there that is lightweight, strong, and good for heat. But they would never build a new F-15C Eagle with new aluminum alloys so that it could go 1875mph for five minutes. That would give the Eagle the ability to get there faster and safely since the aluminum would not break. And with the one tank under the bottom you could create a safety barrier to do the speed test.

2042 is aircraft grade aluminum, but even the finest aluminum is no match for fatigue compared to steel and aluminum alloys available. Not everything on an airplane has to survive much flexure. There are some places that composites have done better than either steel or titanium.

There are thousands upon thousands of types of aluminum alloys though a I bet one have the three characteristics needed for this flight.

If the F-15 only went top speed for three minutes that would save a lot of fuel so that would provide the safety barrier that wrightwing was talking about and that's not that long, so it would not cause any structural problems. Or to chang the metal which i know exists since there are thousands of aluminum and titanium alloys. I bet one of those alloys are lightweight, heat resistant, and strong, so it would not break and there are better composites than carbon fiber too.

Is there a fat lady ANYWHERE in sight?
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Why won't he just sit down next to me on the Mig-25 bandwagon...a jet that could actually perform these speed feats...

How fast could she do inverted say for 5 min?

geogen wrote:

How fast could she do inverted say for 5 min?

It depends on her "composites", geo.
Smile

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Forum: Technology

Impossible aircraft mods...and why