H999 contest

[Chris LaPanse]

Highest acceleration would be fun. Possibly lightest weight at liftoff so an accelerometer would not be needed? This should equate to highest acceleration. As for being surprised at me – why? If the egg floats at 1g, it will float under any acceleration. Try it in the car sometime with a helium filled balloon. When you turn, the balloon leans INTO the turn, not because it is not feeling any inertia or centrifugal force, but rather because the air around it feels MORE centrifugal force. The egg will only sink in the liquid if it would have sunk naturally. In neutral buoyancy, it will not change its location purely from the acceleration – it will maintain its position. If the egg is positively buoyant, it will always be positively buoyant. Suddenly increasing the gravity would not change this, and from the egg’s point of view, there is no difference between launching it on a rocket and suddenly increasing the gravity 10-100 times. If you don’t think this is correct, please explain why – I would love to know if I’m wrong. However, all logic and physics that I know would imply that it would not sink in a liquid that it is positively buoyant in from a force acting on both the egg and the liquid.

[Warren B. MusselmanModerator]

You may be right… I’m just going with the common sense view that a solid object floating in a liquid will move within the liquid under acceleration.

Warren Musselman

[denverdoc]

Warren,

Green jello was a joke referring to my Utah days where it is considered one of the major food groups. But gel would not be a bad choice, and maybe part of a composite cushioning system.

Generally only if there is a differential in density, but as we have decided the fluid should be matched for density and incompressible. There is an exception in biology/medicine which applies in head trauma, but thats because it is more akin to a thin film than a fetus sitting in a big sac. So the brain gets banged around and more importantly ablated by having to traverse ridges. Now a salt water solution in a centrifuge will change over time but for .3sec punch not sure whether it matters whether oil or H20.

One obvious material would be yolk/egg white itself which has the advantage of adding to breakfast the next day. The problem with just one time constant IMO as Chris has alluded to is that the yolk is gonna get slammed down–again think density gradient centrifuge. Here is where I think a sled on the right suspension might just take enough edge off liftoff, and the jerk accompanying burnout.

IMO, highest altitude, 2 eggs, and no yolk breakage. If everyones yolks get popped, highest altitude no shell breakage.
J

[Warren B. MusselmanModerator]

Personally I think we need a test flight before we determine the final rules for the contest… I want to see what an “average” rocket with an H999 does to an egg yolk.

Warren

[denverdoc]

Well given that the yolk can be broken with a quick jerk or two in your hand, I believe its a foregone conclusion that it will be broken but who knows. I’m all for a test flight 🙂 Then decide the rules, I do like the idea of 2 eggs for sure.
J

[Dr. Michael Sutter DC]

all i have to say is tempur pedic! its what astronauts use in the back of their chairs… that can easlly take many G’s we also used to use pantyhose as a net of sorts, by putting the egg inside the hose the strech the hose like its supspended in the middle, Id like to enter this, what is the motor casing needed for warp 9? I have 29/180 and 29/240.

🙄 of course my luck ill burn through another 29 MM case (ive burned through 3 29mm motor casings now 2-180’s and 1-120 2 of which were redline motors used… hmm? 🙄 this is getting kinda rediculos!

[Bruce R. Schaefer]

I think you guys are nuts, which is why I like you guys. This sounds great, and leads to a lot of experimenting. Very nice. 🙂

[denverdoc]

the temper pedic is an amazing material–actually over the summer I got to try one in a motel in GJ. Nice ride, slept like the dead and awoke w/o the usual backache. The ads are even more impressive with a fat guy jumping up and down on the bed while a glass of wine a few feet away is undisturbed. But the astronauts sustain what 6 gees? This poor egg will have to survive maybe 8 times that.

Your point is right on, tho, Dr Sutter, IMO. The foam you mention is visco-elastic material which both has a spring action and a damping action. I think thats whats needed here.
John S

[Warren B. MusselmanModerator]

I think the egg needs to be suspended in oil with about a mm or less space around the egg. The egg will float on the oil and when thrust hits, it will sink into the oil like the piston in a shock absorber with the oil squeezing past the egg into the forward part of the chamber. I’d definitely go with a thinner oil to start with… say extra virgin olive oil… and maybe work up to 20W50 if need be. Worst case you can use 90W hypoid gear oil.

Warren

[Chris LaPanse]

I maintain that the egg would not sink if it began floating.

On the other hand, if an oil could be found where the egg was basically neutrally buoyant, the force would be spread over the entirety of the eggshell, and it would work fine. A liquid suspension would make the egg feel essentially no force, other than the yolk and white being smashed around. If it could be worked out, that would be the way to do it.

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