Rocket Louge on Guinness World's Records

Rocket Louge on Guinness World's Records

Post by Shadowra » Thu, 17 Dec 1998 04:00:00



Anyone else here see the rockets attached to this sled!! The guy said they were
the biggest you could get without an Explosives liscence. What is that G64's?
They looked to me like they were Aerotech casings but I couldn't see the
length.  Could they have been bigger as long as they used them the same day and
weren't storing them?  They even used what looked like Copperheads to ignite
them and they all worked (8 in all, 2 at a time). I personally don't think
rocket engines should be used this way, but that's just my opinion.

 Shane Bryson (Shadowrat1) NAR# 74101  Remove CATO to reply.

"The Constitution guarantees every citizen the right to make a damn fool of
himself, in public or in private, however he or she chooses."              
--Solomon Short--

 
 
 

Rocket Louge on Guinness World's Records

Post by Dave/Kristin Ha » Thu, 17 Dec 1998 04:00:00




: > What is that G64's?
: > (8 in all, 2 at a time).

: Yeah! But that dude was definitely moving! When you consider the weight of the
: rider plus the enormous drag and friction imparted by those little skate
: wheels...Oh Baby! Anyone care to calculate something, anything, here?

Well, just for the sake of back of the envelope... Assume rider/louge/etc
weighed in at 81 kg (We'll neglect the mass of the propellant).  Furhter
assume that all rockets delivered their total impulse within one second.

That implies a force of 1.28 kN for one second.

F = ma => a = 15.8 m/s^2.  => A burnout velocity of 15.8 m/s (35 mph).

That assumes zero drag, of course.

May I assume that the guy was going down hill as well?

 
 
 

Rocket Louge on Guinness World's Records

Post by SoAR » Thu, 17 Dec 1998 04:00:00


I saw it too......Plus arent G80's or Vulcan G200's teh largest without a
permit?If those copperehads didnt lite that woudl of been fun.

Reagan Yates
SoAR#19

 
 
 

Rocket Louge on Guinness World's Records

Post by Tom Binfor » Thu, 17 Dec 1998 04:00:00


Quote:




> : > What is that G64's?
> : > (8 in all, 2 at a time).

> : Yeah! But that dude was definitely moving! When you consider the weight of the
> : rider plus the enormous drag and friction imparted by those little skate
> : wheels...Oh Baby! Anyone care to calculate something, anything, here?

> Well, just for the sake of back of the envelope... Assume rider/louge/etc
> weighed in at 81 kg (We'll neglect the mass of the propellant).  Furhter
> assume that all rockets delivered their total impulse within one second.

> That implies a force of 1.28 kN for one second.

> F = ma => a = 15.8 m/s^2.  => A burnout velocity of 15.8 m/s (35 mph).

> That assumes zero drag, of course.

> May I assume that the guy was going down hill as well?

He was going downhill, the motors boosted his speed from about 60 mph to 70. The
motors were G64's ignited 2 at a time.
Tom
 
 
 

Rocket Louge on Guinness World's Records

Post by Jackbear » Fri, 18 Dec 1998 04:00:00


As of right now (situation politically uncertain and subject to change) with a
Level 2 certification you can buy J350's without a LEUP.
Jack W. Kale, Jr. NAR #70384 Insured, Tripoli #5798 Level 2 March 16, 1998

Timmy, you can't take it with you, so if you have a sandwich and your blue
jeans, chill. Your old man, Paul. (1st century, paraphrased)

 
 
 

Rocket Louge on Guinness World's Records

Post by 5th Ge » Fri, 18 Dec 1998 04:00:00


<major snip>

not that I would wish this on any one but only one word comes to mind:

CATO!

 
 
 

Rocket Louge on Guinness World's Records

Post by Bill Nels » Mon, 21 Dec 1998 04:00:00




:
: : > What is that G64's?
: : > (8 in all, 2 at a time).
:
: : Yeah! But that dude was definitely moving! When you consider the weight of the
: : rider plus the enormous drag and friction imparted by those little skate
: : wheels...Oh Baby! Anyone care to calculate something, anything, here?
:
: Well, just for the sake of back of the envelope... Assume rider/louge/etc
: weighed in at 81 kg (We'll neglect the mass of the propellant).  Furhter
: assume that all rockets delivered their total impulse within one second.

He fired them 2 at a time.  This would be far from optimal for a high
friction system.  I have seen other calculations that figured he gained
all of 8-10 mph from the motors. And I suspect that even those
calculations were generous.

In other words, most of the volocity was due to coasting downhill, not
from the motors.  They were more of a publicity thing than anything
else.

--

 
 
 

Rocket Louge on Guinness World's Records

Post by Chris Taylo » Mon, 21 Dec 1998 04:00:00


Hmmm I dont know

I watched the show and calculations aside

When the motors LIT they had a camera capture of his speed and there was a
Definite Jump in speed each time he lit motors and he was usually goiing
about 6-10 mph faster after each burn as could be SEEN on the screen

Chris
http://www.nerys.com/rocketry/

Quote:





>:
>: : > What is that G64's?
>: : > (8 in all, 2 at a time).
>:
>: : Yeah! But that dude was definitely moving! When you consider the weight
of the
>: : rider plus the enormous drag and friction imparted by those little
skate
>: : wheels...Oh Baby! Anyone care to calculate something, anything, here?
>:
>: Well, just for the sake of back of the envelope... Assume rider/louge/etc
>: weighed in at 81 kg (We'll neglect the mass of the propellant).  Furhter
>: assume that all rockets delivered their total impulse within one second.

>He fired them 2 at a time.  This would be far from optimal for a high
>friction system.  I have seen other calculations that figured he gained
>all of 8-10 mph from the motors. And I suspect that even those
>calculations were generous.

>In other words, most of the volocity was due to coasting downhill, not
>from the motors.  They were more of a publicity thing than anything
>else.

>--