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Stratolaunch Unveiled

06/01/2017 1:34 PM

How's this for an enormous mechanical engineering feat!

Thee Dailily news report can be found by clicking on the picture, The CNN report includes some additional details. The race to commercialize space is getting interesting.

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#1

Re: Stratolaunch unveiled

06/01/2017 1:36 PM

Sometimes a typographic error can be funny.

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#2
In reply to #1

Re: Stratolaunch unveiled

06/01/2017 1:46 PM

The Dalailily Lama says "I know, right?"

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#3

Re: Stratolaunch unveiled

06/01/2017 2:03 PM

It makes sense. A rocket is not a very efficient device for lifting heavy loads through the lower atmosphere.

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#8
In reply to #3

Re: Stratolaunch unveiled

06/01/2017 4:41 PM

This approach probably will be more efficient lifting a heavy load through the atmosphere, but I thought the crux of the problem was achieving orbital speed and instead of altitude.

The likely torsion and torques on that mid-wing section through normal turbulence let alone the launched rocket wake makes me nervous.

All I can say is I'm glad its not my money invested in this. Then again, I wish I had enough money that they would ask me to invest in this.

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#12
In reply to #8

Re: Stratolaunch unveiled

06/01/2017 7:28 PM

"...The likely torsion and torques on that mid-wing section through normal turbulence let alone the launched rocket wake makes me nervous..."

.

My sentiments exactly! Using a connected horizontal stabilizers similar to the mid wing section would allow a much more robust built. I wonder why the horizontal stabilizers are kept separate.

.

I also wonder about the flat noses.

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#4

Re: Stratolaunch unveiled

06/01/2017 2:54 PM

It's great 'til the pilots in one cockpit fall out with those in the other.

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#5
In reply to #4

Re: Stratolaunch unveiled

06/01/2017 3:20 PM

"I SAID we're going to Boston!"

"Screw you! I'm going to L.A.!"

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#6

Re: Stratolaunch unveiled

06/01/2017 3:39 PM

If two fuselages are better than one, why not three?

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#15
In reply to #6

Re: Stratolaunch unveiled

06/01/2017 10:01 PM

The needed Added wing area for the extra fuselages

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#18
In reply to #6

Re: Stratolaunch unveiled

06/02/2017 5:37 AM

Keeping things "balanced" with and without the payload would be a nightmare with an odd number of fuselages.

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#7

Re: Stratolaunch unveiled

06/01/2017 4:16 PM

Apparently, the structural design is strong enough to fly well enough under many conditions, but seems intrinsically weakened by not having the tail sections directly connected with one continuous, intermediate wing...

In rough weather, one fuselage could oscillate out of phase with the other, and thereby, shake itself apart, without a correcting force transmitted by a single continuous connecting wing...

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#9
In reply to #7

Re: Stratolaunch unveiled

06/01/2017 4:57 PM

"Each fuselage has its own tail with horizontal and vertical stabilizer, leaving a clear area behind the payload to reduce the risk of interference during flight."

https://en.wikipedia.org/wiki/Scaled_Composites_Stratolaunch

Possibly air turbulence from the payload would cause problems if the horizontal stabilizer went all the way across. Maybe independently controlling both stabilizers could be used to cancel out any "twisting" problem from rough weather.

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#10
In reply to #9

Re: Stratolaunch unveiled

06/01/2017 6:18 PM

I'm ''crossing my fingers'' for good enough weather, but I still would not fly in it...

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#11
In reply to #9

Re: Stratolaunch unveiled

06/01/2017 6:26 PM

Pretty good chance they wouldn't be launching a rocket from that plane in bad weather anyway. Yes they have to accommodate somewhat less-than-ideal conditions (clear-air turbulence, etc.), but this isn't really designed to be an all-weather aircraft.

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#21
In reply to #11

Re: Stratolaunch unveiled

06/05/2017 3:34 PM

Let's hope it doesn't ever have to land in condititions similar to the wind shear that periodically occurs at (Chigago's O'hare ?) Airport...

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#23
In reply to #21

Re: Stratolaunch unveiled

06/06/2017 11:11 PM

Maybe, you haven't had the opportunity to fly in or out our fine States, like Colorado, Nevada, or some cities in California and I know there are many more airports that suffer wind shear. And as far as "the wind" Chicago has nothing on Cheyenne, Wy. when it comes to "wind" It can be an "E" ride in the winter with 2" of ice and 50mph cross wind in a white-out!

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#24
In reply to #23

Re: Stratolaunch unveiled

06/13/2017 11:51 AM

Thanks for underscoring my point about how even landing can be dangerous flying...

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#25
In reply to #24

Re: Stratolaunch unveiled

06/13/2017 1:34 PM

"...even landing can be dangerous..."

Wow, quite the understatement. 'Landing,' as the cessation of flight and contact with land or water below, isn't adequately described as 'even...can be dangerous.' 'Landing' is usually the most dangerous aspect.

Consider if you have an engine or two fail just after the wheels lift off. The danger isn't the takeoff, it is the severity of the impending landing.

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#26
In reply to #25

Re: Stratolaunch unveiled

06/13/2017 4:13 PM

"The danger isn't the takeoff, it is the severity of the impending landing." Your right.

But, you don't necessarily need to be airborne to have a really bad landing.

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#13

Re: Stratolaunch Unveiled

06/01/2017 9:03 PM

Thanks, no thanks. I can see the asymmetrical thrust of one engine being a problem before they get off the ground. If you ever want to hear a pilot whining, give them spit throttle knobs on a multi-engine aircraft. But, then even the Spruce Goose flew for a moment before being mothballed. What I understand is that they're basing the rocket to launch like the X-15, falls free and clear before the booster engines are lite. If that's the case, I would have a full span horizontal tail plane.

Rigging this aircraft "as it's designed now", would be a nightmare, 1/4° of deflection off between the two tail sections could cause some serious twisting moment.

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#14
In reply to #13

Re: Stratolaunch Unveiled

06/01/2017 9:38 PM

Just to play "Devil's Advocate" here, with the more robust and rapid control feedback technology we have today this might be a large scale version of the feedback technology used to make the X-29 at all flyable.

(This magnificent research project should not have been capable of flying safely at all, let alone at supersonic speeds.)

Thus independent but "computer" trimmed control of each separate rudder and all four elevators maybe why the stresses on the mid-wing will be tolerable.

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#16
In reply to #14

Re: Stratolaunch Unveiled

06/01/2017 10:25 PM

It's still a pretty cool (massive) airplane but I think I'll wait a few thousand hours of flight time before I jump one. As far as flight computers, there fine til they receive the wrong input or lack of input (AF447). I guess I'm too old, I still rather hear loose rudder cables slapping on the belly to let you know it's time to tighten up the ship.

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#17

Re: Stratolaunch Unveiled

06/02/2017 2:26 AM
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#19

Re: Stratolaunch Unveiled

06/04/2017 9:52 AM

Does anyone know why the noses are flat with sharp edges?

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#20
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Re: Stratolaunch Unveiled

06/04/2017 10:07 AM

I believe it's for aerodynamic reasons.

working naval architects in the ship yards, the fast attack boats we designed and built the chimes were sharp edges, very little eddies that created resistance, the water flow over without getting sucked in.

the flat edges, my guess would be somewhat opposite, and that it would create resistance over a larger area for slowing the craft down with the correct angle of attack.

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#22
In reply to #20

Re: Stratolaunch Unveiled

06/06/2017 10:57 PM

They haven't installed the radar antenna nor the radome, they're just trying to find out how many fuel leaks they have before they light the candles.

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