Old video of Burt Rutan and Mike Melvill demoing composite strength.

While searching for videos demonstrating composite construction on Youtube,
I came across this rather dated video of Burt Rutan and Mike Melvill
demonstrating the advantages of composites over aluminum:

http://www.youtube.com/watch?v=7eUt0YnNF3o

Jim Logajan wrote:
While searching for videos demonstrating composite construction on Youtube,
I came across this rather dated video of Burt Rutan and Mike Melvill
demonstrating the advantages of composites over aluminum:

http://www.youtube.com/watch?v=7eUt0YnNF3o

Very interesting.
But no information given about the weight differences.

In article ,
cavelamb himself wrote:

Jim Logajan wrote:
While searching for videos demonstrating composite construction on Youtube,
I came across this rather dated video of Burt Rutan and Mike Melvill
demonstrating the advantages of composites over aluminum:

http://www.youtube.com/watch?v=7eUt0YnNF3o

Very interesting.
But no information given about the weight differences.

Actually, he mentioned at least twice that both were the same weight.

--
"The iPhone doesn't have a speaker phone" -- "I checked very carefully" --
"I checked Apple's web pages" -- Edwin on the iPhone
"It is Mac OS X, not BSD.' -- 'From Mac OS to BSD Unix." -- "It's BSD Unix with Apple's APIs and GUI on top of it' -- 'nothing but BSD Unix' (Edwin on Mac OS X)
'[The IBM PC] could boot multiple OS, such as DOS, C/PM, GEM, etc.' --
'I claimed nothing about GEM other than it was available software for the
IBM PC. (Edwin on GEM)
'Solaris is just a marketing rename of Sun OS.' -- 'Sun OS is not included
on the timeline of Solaris because it's a different OS.' (Edwin on Sun)

Alan Baker wrote:

In article ,
cavelamb himself wrote:


Jim Logajan wrote:

While searching for videos demonstrating composite construction on Youtube,
I came across this rather dated video of Burt Rutan and Mike Melvill
demonstrating the advantages of composites over aluminum:

http://www.youtube.com/watch?v=7eUt0YnNF3o

Very interesting.
But no information given about the weight differences.


Actually, he mentioned at least twice that both were the same weight.


I'll go back and watch it again, but I didn't hear that.

And yes, I really am pretty deaf.

Richard
--
(remove the X to email)

Now just why the HELL do I have to press 1 for English?
John Wayne

In article ,
cavelamb himself wrote:

Jim Logajan wrote:
While searching for videos demonstrating composite construction on Youtube,
I came across this rather dated video of Burt Rutan and Mike Melvill
demonstrating the advantages of composites over aluminum:

http://www.youtube.com/watch?v=7eUt0YnNF3o

Very interesting.
But no information given about the weight differences.

You mean other than stating multiple times that the two parts shown were
exactly the same weight?

What weight differences? Repeatedly throughout the clip the fact that
both airfoils were the same weight was repeated. The weight
difference in completed aircraft has been shown to be very minor even
when the composite aircraft was entirely constructed using hand
layups. Kits with premolded parts are often equal or lighter in
weight than comparable metal aircraft.

cavelamb himself wrote:
Jim Logajan wrote:
While searching for videos demonstrating composite construction on Youtube,
I came across this rather dated video of Burt Rutan and Mike Melvill
demonstrating the advantages of composites over aluminum:

http://www.youtube.com/watch?v=7eUt0YnNF3o

Very interesting.
But no information given about the weight differences.

cavelamb himself wrote:
Jim Logajan wrote:
While searching for videos demonstrating composite construction on Youtube,
I came across this rather dated video of Burt Rutan and Mike Melvill
demonstrating the advantages of composites over aluminum:

That video was marketing, not an engineering analysis. Its the kind of
thing that you see at trade shows and on infomercials because it looks
cool and illustrates the claimed advantages of one thing over another.
Politicians use exactly the same marketing techniques in thier
campaign ads. Why? Two reasons. First, to give an exacting accurate
account of anything, be it an engineering analysis of alum vs. 'glass
or the voting records of the donkeys vs. the elephants, you need time
to cover all of the points. Second, most people get bored with minutia
and don't want to suffer through hours of something that sounds like a
doctorial thesis just to find out that this stuff is sometimes better
than that stuff and vice versa. They want at most a 5 minute
explination. 1 minute is better. 28 seconds is ideal.

Fact is that we've all debated the merits of various materials in this
group and determined that just about everything in use has some merit
and some disadvantages. And we've also all determined that until some
genus produces mass-quantities of cheap Idealtoniumunobtanium, there
will be no perfect material for constructing a flying machine. What we
all do with what we have, what we choose to buy, and what we can do
without is the stated puropse of this group. Go forth and experiment.

Harry Frey
Wright Brothers Enterprises
"worst design-type on RAH"

Pseudo-science. A floor-mat isn't an airplane's wing and anyone who
tries to sell you the one by comparing it to the other is simply
preying upon your ignorance.

In the final analysis most of the claims made for the Varieze -- VW-
powered, easy to build, inexpensive, simple control system -- proved
false.

-R.S.Hoover

"vee" == veeduber writes:

vee Pseudo-science. A floor-mat isn't an airplane's wing and
vee anyone who tries to sell you the one by comparing it to the
vee other is simply preying upon your ignorance.

vee In the final analysis most of the claims made for the Varieze
vee -- VW- powered, easy to build, inexpensive, simple control
vee system -- proved false.

Say it again, brudda! Rutan is aviation's premier snake-oil salesman.
--
I have the greatest admiration for your propaganda. Propaganda in the
West is carried out by experts who have had the best training in the
world, in the field of advertising, and have mastered the techniques
with exceptional proficiency. Yours are subtle and persuasive; ours
are crude and obvious. I think that the fundamental difference between
our worlds, with respect to propaganda, is quite simple. You tend to
believe yours and we tend to disbelieve ours.
~ A U.S. based Soviet correspondent

Heifer dust. Daddy taught me that the best sense an engineer can have is to
recognize a dead horse, take it out, and bury it with the least possible
ceremony.

Rutan discovered early on, before anybody bought the farm with his poor
advice, that the VW was NOT reliable enough to power the airplane properly.
He immediately changed his plans to incorporate a "real" airplane engine.
As I understand it, there are EZs flying with every imaginable powerplant,
from Continentals to Mazdas and Suzukis.

As to "easy to build", that is a loosey-goosey term. However, until Rutan
came along, airplane construction for most folks was measured in decades.
He measured in years. Get a full blown factory up and running to provide
"kits" with "fast build" options like Van and you now measure in months.
That wasn't Rutan's gig. He sold plans, that if followed, produced a pretty
damned good airplane. And, unlike some in the business, never took a nickel
from anybody for vaporware.

As to "simple control system", again that is something that can't be
measured. What is simple to one is complex to another.

But Grizzly, Defiant, Voyager, Space I ... marks of a snake oil salesman?
Fry, you suck. Oh, and Fry, how many designs have YOU made that have flown?
And put on the market? And endured years and years of answering the same
stupid questions over and over? And year after year filled the tent at
Oshkosh with overflow crowds? Hmmm?

Jim

--
"It is the mark of an educated mind to be able to entertain a thought
without accepting it."
--Aristotle




"Bob Fry" wrote in message
...


vee In the final analysis most of the claims made for the Varieze
vee -- VW- powered, easy to build, inexpensive, simple control
vee system -- proved false.

Say it again, brudda! Rutan is aviation's premier snake-oil salesman.