Mythbusters plan to uncover plane on conveyor belt

91,213 Views | 2087 Replies | Last: 5 yr ago by toucan82
TexasRebel
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
11:07p, 12/27/07
AG
I started mechanical and then went AGEN...but I still took MEEN courses...

cars use the same equation, but the normal force on the cars doesn't vary much at higher velocities and can be assumed negligible...unless it is an F1 or some such that is shaped like an inverted airplane wing...

but the change in resistance from a change in velocity cannot be ignored when trying to get a few more mph or mpg.

Page 42

[This message has been edited by TexasRebel (edited 12/27/2007 11:07p).]
Reply Quote
Ag with kids
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
11:23p, 12/27/07
AG
When I go back to work - next week or the week after that, whichever I feel like doing - I'll grab my sim book. My colleague wrote it and it's got pretty much everything you need to model an aircraft. I figure he would know what he's talking about in for this stuff, since he wrote our landing gear model...

Interesting side note on that...he's a PSU alum... I told him he was my mortal enemy for this Saturday...
Reply Quote
TexasRebel
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
11:31p, 12/27/07
AG
if it is dealing with aircraft, I wonder if they would just use the the takeoff speed with a safety factor for the coefficent...

also, the coefficent may vary so little between the different velocities that different planes need for take off that the Crr doesn't change much...

but if you read back on one of the earlier pages of this thread (haha, yeah please don't) you'll see that the only way for the belt to keep the plane stationary is to go so fast that the rolling resistance = engine thrust...

it's an impossibly fast number...the slower Crr changes, the higher the velocity of the belt has to be.

as for the relation to Crr and V I'm sure they have a Crr = kV^(1/x) relationship...with x<1.
Reply Quote
Ag with kids
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
12:36a, 12/28/07
AG
quote:
also, the coefficent may vary so little between the different velocities that different planes need for take off that the Crr doesn't change much...


I cannot imagine that the Crr increases more than moving around in the noise of the force equations for ANY airplane taking off...

Oh yeah...

The Crr is moot!
Reply Quote
Ag with kids
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
12:37a, 12/28/07
AG
And TexasRebel is moot, too!!!

We have GOT to get back on the track of this thread - we were actually discussing real engineering....
Reply Quote
MonkeyKnifeFighter
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
12:41a, 12/28/07
Reply Quote
1 edit
Ag with kids
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
1:08a, 12/28/07
AG
At this point????

I've been having tons of fun with it since pg. 1...
Reply Quote
TexasRebel
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
1:09a, 12/28/07
AG
lets see if we can get a plane to peel out...
Reply Quote
MonkeyKnifeFighter
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
1:10a, 12/28/07
Reply Quote
1 edit
Ag with kids
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
1:16a, 12/28/07
AG
quote:
The skis can't generate a friction force to propel the plane! Oh noes! Physics fails!


Planes on skis do it the same way skiers do. They try to take off from a downhill slope. If this is not possible, then the skis move like cross country skiers to propel them forward...only much faster...They look like Eric Heiden on crystal meth...
Reply Quote
Ag with kids
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
1:19a, 12/28/07
AG
quote:
W/Kids: I'm just a little paranoid that your sarcastic chatter is going to inspire a new breed of won't-take-off diehards.


Wittle ol' me?

I'm just letting the world know how airplanes fly...

They need to know the lies about engines and such!!!!
Reply Quote
IIIHorn
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
9:22a, 12/28/07
The conveyor is moot!
Reply Quote
IIIHorn
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
11:04a, 12/31/07
So when will the show air?
Reply Quote
Brad 03
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
11:05a, 12/31/07
AG
I just wanted to post so I am not the only person in history whose name was not on this thread.
Reply Quote
toucan82
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
11:07a, 12/31/07
there's a marathon today, so it should be on later
Reply Quote
IIIHorn
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
10:37a, 1/4/08
Would someone please provide an update as to when the show will air?
Reply Quote
Oh Four Five
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
10:40a, 1/4/08
AG
The show is on a conveyor belt. It will never air.
Reply Quote
IIIHorn
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
10:40a, 1/4/08
But will it take off ...
Reply Quote
CDUB98
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
10:42a, 1/4/08
AG
dammitt, horn


Can't you wait until the 29th to TTT this?
Reply Quote
IIIHorn
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
10:50a, 1/4/08
ttt for CDUB.
Reply Quote
SolidT05
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
12:03p, 1/4/08
SF2004
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
12:06p, 1/4/08
AG
moot
Reply Quote
toucan82
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
10:30p, 1/4/08
CDUB = moot
Reply Quote
Skinny Wrinkles
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
10:32p, 1/4/08
Skinny Wrinkles
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
10:32p, 1/4/08
Skinny Wrinkles
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
10:32p, 1/4/08
Caliber
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
10:50p, 1/4/08
AG
I like this thread...so many trolls
Reply Quote
Skinny Wrinkles
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
10:52p, 1/4/08
Skinny Wrinkles
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
10:59p, 1/4/08
Caliber
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
10:59p, 1/4/08
Ag with kids
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
1:44a, 1/5/08
AG
Trolling?

I see you show your ignorance as to how airplanes fly...you non-engineering peon...
Reply Quote
jokershady
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
2:02a, 1/5/08
AG
discovery channel is moot
Reply Quote
Ag with kids
User Profile
Private Message
Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
2:03a, 1/5/08
AG
Well, obviously...discovery channel isn't on a conveyor belt...
Reply Quote
2
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
2:04a, 1/5/08
will take off
Reply Quote
jokershady
User Profile Ignore User Stop Ignoring
How long do you want to ignore this user?
24 hours One week Permanently Cancel
2:11a, 1/5/08
AG
kids are moot
Reply Quote
 
×
subscribe Verify your student status
See Subscription Benefits
Trial only available to users who have never subscribed or participated in a previous trial.