Matronics Email Lists :: View topic - Major new product announcement from Vans

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Major new product announcement from Vans
Goto page Previous 1, 2, 3

Matronics Email Lists Forum Index -> RV-List

View previous topic :: View next topic

Author Message

Hopperdhh(at)aol.com
Guest

Posted: Sun Jul 16, 2006 11:44 am Post subject: Major new product announcement from Vans

In a message dated 7/16/2006 3:35:33 P.M. Eastern Daylight Time,  3edcft6(at)cox.net writes:

  	  Quote: 	
		  To    answer my own question, I did a little googleing on the density of 

air and    helium, and a little calculating and came up with 14,562 cubic 

feet needed    to make 1000 lbs float in air.  So if your blimp were 18 

feet in    diameter and 57 feet long that would do it.  The 18 ft diameter    

(which doesn't include the cockpit) will not allow it to fit in a    

typical hangar small plane hangar.



If anyone really cares how I    came up with my 14,562 cubic feet number, I 

would be happy to post    it.



do not archive



	


 

  

 Chris W,

  

 Oh darn, I was just going to try to figure it out.  Wait a while  before telling.

  

 Dan Hopper

 RV-7A

Hopperdhh(at)aol.com
Guest

Posted: Sun Jul 16, 2006 12:09 pm Post subject: Major new product announcement from Vans

In a message dated 7/16/2006 3:46:24 P.M. Eastern Daylight Time,  Hopperdhh(at)aol.com writes:

  	  Quote: 	
		         	  Quote: 	
		  If      anyone really cares how I came up with my 14,562 cubic feet number, I      

would be happy to post it.



do not    archive



	


   

    

   Chris W,

    

   Oh darn, I was just going to try to figure it out.  Wait a while    before telling.

    

   Dan Hopper

   RV-7A

	


 

 OK Chris,

  

 I came up with 14,387 cubic feet.  We're pretty close.  Lets  compare notes.

  

 Dan K9WEK

  

 do not archive

Hopperdhh(at)aol.com
Guest

Posted: Sun Jul 16, 2006 12:24 pm Post subject: Major new product announcement from Vans

In a message dated 7/16/2006 4:11:31 P.M. Eastern Daylight Time,  Hopperdhh(at)aol.com writes:

  	  Quote: 	
		        In a message dated 7/16/2006 3:46:24 P.M. Eastern Daylight Time,    Hopperdhh(at)aol.com writes:

    	  Quote: 	
		             	  Quote: 	
		  If        anyone really cares how I came up with my 14,562 cubic feet number, I        

would be happy to post it.



do not      archive



	


     

      

     Chris W,

      

     Oh darn, I was just going to try to figure it out.  Wait a while      before telling.

      

     Dan Hopper

     RV-7A

	


   

   OK Chris,

    

   I came up with 14,387 cubic feet.  We're pretty close.  Lets    compare notes.

    

   Dan K9WEK

    

   do not archive

    

	


 

 Oops, I think I found it.  My gas densities were for 0 degrees  C.  Looks like we're both on the same page.  Better make it a little  bigger anyway for higher density altitudes, and to allow for a little  leakage!  You may be on to something here Chris.

  

 Dan

 do not archive

pcowper(at)webtv.net (Pet
Guest

Posted: Sun Jul 16, 2006 3:15 pm Post subject: Major new product announcement from Vans

 	  Quote: 	
		  "I'll guess its air bags to deploy in a crash"


	


So how will it tell the difference between a crash and one of my normal

crappy landings?!!



Pete Cowper

RV-8 #81139

evmeg(at)snowcrest.net
Guest

Posted: Sun Jul 16, 2006 6:53 pm Post subject: Major new product announcement from Vans

My instructor told me if I walk away its a good landing...if I can fly the

plane again, that's a great landing.



---

ronlee(at)pcisys.net
Guest

Posted: Sun Jul 16, 2006 7:23 pm Post subject: Major new product announcement from Vans

 	  Quote: 	
		  My instructor told me if I walk away its a good landing...if I can fly the

plane again, that's a great landing.


	


I prefer this version " If you can fly the plane again it is a good landing.

If you have to verify that you landed because it was so smooth it was a

great landing."



Ron Lee



do not archive

klwerner(at)comcast.net
Guest

Posted: Sun Jul 16, 2006 9:07 pm Post subject: Major new product announcement from Vans

Dear Pete,

  

 Wire it in with your  ELT, and if that one should go off during one of your landings  (...justifiably or not),  well then ...POOFFF goes the magic  dragon!!!

  

 Perhaps you may want to improve your  landing skills, just in case you don't want to be blown out of your  own airplane during touch down.

  

 do not archive ever

  

 ---

3edcft6(at)cox.net
Guest

Posted: Sun Jul 16, 2006 10:01 pm Post subject: Major new product announcement from Vans

Hopperdhh(at)aol.com wrote:



 	  Quote: 	
		   OK Chris,

  

 I came up with 14,387 cubic feet.  We're pretty close.  Lets compare 

 notes.

  


	


As close as we were I think the reason for the difference is the numbers 

we used for the density of air and helium.  I just used the first number 

I found which I found here...

http://www.elmhurst.edu/~chm/vchembook/imagespdb/123Adensitygas.html#table

 Helium = 0.00018 grams/ml or 0.0112 lbs/ft^3

Air = 0.00128 grams/ml or 0.0799 lbs/ft^3



But I still have no idea if you could build such a contraption that was 

only 1000 lbs with the pilot.  The 1000 lbs was just a wild guess.  Even 

if the gross weight were 500 lbs it still couldn't fit in a typical 

small plane hangar.



do not archive



-- 

Chris W

KE5GIX

Hopperdhh(at)aol.com
Guest

Posted: Mon Jul 17, 2006 3:37 am Post subject: Major new product announcement from Vans

In a message dated 7/17/2006 2:03:22 A.M. Eastern Daylight Time,  3edcft6(at)cox.net writes:

  	  Quote: 	
		  -->    RV-List message posted by: Chris W    <3edcft6(at)cox.net>



Hopperdhh(at)aol.com wrote:



 	  Quote: 	
		   OK    Chris,

  

 I came up with 14,387 cubic feet.  We're    pretty close.  Lets compare 

 notes.

  


	


As    close as we were I think the reason for the difference is the numbers 

we    used for the density of air and helium.  I just used the first number    

I found which I found    here...

http://www.elmhurst.edu/~chm/vchembook/imagespdb/123Adensitygas.html#table

Helium    = 0.00018 grams/ml or 0.0112 lbs/ft^3

Air = 0.00128 grams/ml or 0.0799    lbs/ft^3

	
 Chris,

  

 You're right.  I used the table in my old Sears and Zemansky college  physics book.  It is probably correct, but for 0 degrees C.

  

 Helium = 0.1785E-3 gm/cc

 Air = 1.2929E-3 gm/cc

  

 A cc is the same as a ml.

  

 That would be a lot of sewing!  Hey, you could make it half the  size if you used hydrogen!

  

 Hydrogen = 0.0899 gm/cc

  

 I wonder what they use as the density for hot air.

  

 Dan

  

  

  

 But I still have no idea if you could build such a contraption that was  

only 1000 lbs with the pilot.  The 1000 lbs was just a wild  guess.  Even 

if the gross weight were 500 lbs it still couldn't fit in  a typical 

small plane hangar.



do not archive



-- 

Chris  ==========================   ronics  he  at,  nbsp;                         ===================================================  ;                         gt;  =========================p;             - List Contribution Web Site  nbsp;                         ==================================================

lm4(at)juno.com
Guest

Posted: Mon Jul 17, 2006 4:36 am Post subject: Major new product announcement from Vans

Chris,

	1000 cubic feet of Helium will displace 68 lbs.

Larry Mac Donald

Do not achcive

On Sun, 16 Jul 2006 11:43:40 -0500 Chris W <3edcft6(at)cox.net> writes:

 	  Quote: 	

 sportav8r(at)aol.com wrote:

 > BTW, why are there no homebuilt blimps flying?  Can't be that hard 

 > with modern envelope materials, and a single seater would be way 

 cool 

 I think single place homebuilt blimp would be pretty cool too.  My 

 question is, wouldn't a blimp like that still require a VERY large 

 hangar?  That may be why no one has kits for one.  Surely you would 

 have 

 to keep it in a hangar.  Can anyone calculate how many cubic feet of 

 helium you would need to float an airship that was say 1000 lbs 

 "take 

 off" weight?   That 1000 lbs is, of course, just a wild guess, I 

 have no 

 idea how heavy such a contraption would be.

 do not archive

 -- 

 Chris W

 KE5GIX

3edcft6(at)cox.net
Guest

Posted: Mon Jul 17, 2006 9:49 am Post subject: Major new product announcement from Vans

Hopperdhh(at)aol.com wrote:

 	  Quote: 	
		   In a message dated 7/17/2006 2:03:22 A.M. Eastern Daylight Time, 

 3edcft6(at)cox.net writes:

     Hopperdhh(at)aol.com wrote:

     > OK Chris,

     > 

     > I came up with 14,387 cubic feet.  We're pretty close.  Lets

     compare

     > notes.

     > 

     As close as we were I think the reason for the difference is the

     numbers

     we used for the density of air and helium.  I just used the first

     number

     I found which I found here...

     http://www.elmhurst.edu/~chm/vchembook/imagespdb/123Adensitygas.html#table

     Helium = 0.00018 grams/ml or 0.0112 lbs/ft^3

     Air = 0.00128 grams/ml or 0.0799 lbs/ft^3

 Chris,

 You're right.  I used the table in my old Sears and Zemansky college 

 physics book.  It is probably correct, but for 0 degrees C.

 Helium = 0.1785E-3 gm/cc

 Air = 1.2929E-3 gm/cc

 A cc is the same as a ml.

 That would be a lot of sewing!  Hey, you could make it half the 

 size if you used hydrogen!

 Hydrogen = 0.0899 gm/cc

Hydrogen would require only half the VOLUME, but cutting the volume in 

half only reduces the overall dimensions by about 21%

Say you have 8 cubic feet.  (2 x 2 x 2)  and now you want only 4 cubic 

feet that would be 1.587 x 1.587 x 1.587

1.587/2 is .794 or 79.4%.  Thus a reduction in size of only 20.6%, gives 

you a 50% reduction in volume.  Conversely, a 26% increase in size, 

gives a 100% increase in volume.  Isn't math fun?

do not archive

-- 

Chris W

KE5GIX

jhstarn(at)verizon.net
Guest

Posted: Mon Jul 17, 2006 11:07 am Post subject: Major new product announcement from Vans

Myth or fact: Hydrogen is too dangerous to use.

www.clean-air.org/hindenberg



"Remember the Hindenberg". There is a site with history & facts to present.

HOWEVER, I saw my brother in-law blow up a car battery attempting to "jump" 

start a car because of hydrogen buildup. He was lucky the flash & acid 

missed him completely. But it sure made a mess of the engine compartment, 

wheel well, brake and fender on one car & the paint job on the other. 

Anybody know what 14K cubic feet of Helium or 7K cubic feet of Hydrogen 

would cost ?.

By the way the "experts" blame the Hinderberg fire on the paint, what kind 

of paint ?. Aluminum of course. Interesting read.  KABONG Do Not Archive. 

I'll stick with gasoline that you can smell, I can't but you can.



That would be a lot of sewing!  Hey, you could make it half the

 	  Quote: 	
		  > size if you used hydrogen!

>  Hydrogen = 0.0899 gm/cc

>

 Hydrogen would require only half the VOLUME, but cutting the volume in 

 half only reduces the overall dimensions by about 21%



 Say you have 8 cubic feet.  (2 x 2 x 2)  and now you want only 4 cubic 

 feet that would be 1.587 x 1.587 x 1.587

 1.587/2 is .794 or 79.4%.  Thus a reduction in size of only 20.6%, gives 

 you a 50% reduction in volume.  Conversely, a 26% increase in size, gives 

 a 100% increase in volume.  Isn't math fun?



 do not archive

 -- 

 Chris W

 KE5GIX

rv7(at)b4.ca
Guest

Posted: Mon Jul 17, 2006 12:16 pm Post subject: Major new product announcement from Vans

On 12:04:55 2006-07-17 "JOHN STARN" <jhstarn(at)verizon.net> wrote:

 	  Quote: 	
		   Myth or fact: Hydrogen is too dangerous to use.

 www.clean-air.org/hindenberg


	


Link didn't work for me, but I found this one that's similar.

http://www.clean-air.org/hindenberg.htm



(just in case anyone is interested... it *is* an interesting read, if not

RV-Related).



-Rob



DO NOT ARCHIVE

Hopperdhh(at)aol.com
Guest

Posted: Mon Jul 17, 2006 4:24 pm Post subject: Major new product announcement from Vans

In a message dated 7/17/2006 1:50:49 P.M. Eastern Daylight Time,  3edcft6(at)cox.net writes:

  	  Quote: 	
		  Hydrogen    would require only half the VOLUME, but cutting the volume in 

half only    reduces the overall dimensions by about 21%



Say you have 8 cubic    feet.  (2 x 2 x 2)  and now you want only 4 cubic 

feet that    would be 1.587 x 1.587 x 1.587

1.587/2 is .794 or 79.4%.  Thus a    reduction in size of only 20.6%, gives 

you a 50% reduction in    volume.  Conversely, a 26% increase in size, 

gives a 100% increase in    volume.  Isn't math fun?



do not archive

-- 

Chris    W

KE5GIX



	


 

  

  

 Chris,

  

 Try 1/(cube root of 2)=.7937 since we're going from a cubic dimension  to a linear dimension.  In other words, if we reduce all the linear  dimensions to .7937 of what they were, the volume will be one half of what it  was.  Same thing as what you are saying -- just more fun with math!

  

 do not archive

  

 Dan

  

  

 Dan

sportav8r(at)aol.com
Guest

Posted: Fri Jul 21, 2006 5:09 pm Post subject: Major new product announcement from Vans

Lawyer:  the best possible landing is one you can walk away from, but your neck hurts.

    

   -Stormy

   /not a lawyer/ 

    

  

 --

jhstarn(at)verizon.net
Guest

Posted: Sat Jul 22, 2006 7:22 pm Post subject: Major new product announcement from Vans

OR one where you get a Medivac  helicopter flight, two days in the hospital, 30 hours strapped to a back board,  a real nasty 6" cut complete with "flap" on your head that has still not healed  after a month, a sore neck, 20 staples BUT no broken bones. It was the end of  day two but I did walk about, sorta.  KABONG  8*)

  

 

 

  	  Quote: 	
		     Lawyer:  the best possible landing is one you can walk away from,    but your neck hurts.

    

   -Stormy

   /not a lawyer/

T.gummo(at)verizon.net
Guest

Posted: Sat Jul 22, 2006 8:13 pm Post subject: Major new product announcement from Vans

There Jack goes bragging again.  

 don't forget the DNA on this on messages of this  type.

  

 Tom 

  

 do not archive

 [quote]   ---

rv8ch

Joined: 10 Jan 2006
Posts: 250
Location: Switzerland

Posted: Sat Jul 22, 2006 11:36 pm Post subject: Major new product announcement from Vans

JOHN STARN wrote:

 	  Quote: 	
		   OR one where you get a Medivac helicopter flight, two days in the 

 hospital, 30 hours strapped to a back board, a real nasty 6" cut 

 complete with "flap" on your head that has still not healed after a 

 month, a sore neck, 20 staples BUT no broken bones. It was the end of 

 day two but I did walk about, sorta.  KABONG  8*)


	


Wow - 20 staples, that sounds kind of nasty.  I guess with those

scars your new callsign could be updated to Franken-KABONG.



Have you been back in the saddle?  I'm sure glad it didn't turn

out any worse.



-- 

Mickey Coggins

http://www.rv8.ch/

#82007 finishing

do not archive

_________________
Mickey Coggins
http://www.rv8.ch/

Display posts from previous:

	Matronics Email Lists Forum Index -> RV-List	All times are GMT - 8 Hours Goto page Previous 1, 2, 3
Page 3 of 3

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum