forum for kitesurfers
-
mpitre
- Rare Poster
- Posts: 5
- Joined: Thu Apr 15, 2010 6:55 pm
- Kiting since: 2008
- Local Beach: Lake Ray Hubbard (near Dallas Tx.)
Lake Benbrook (near Fort Worth Tx.)
Galveston Beach (Houston Area)
- Favorite Beaches: Matira Point, Bora Bora F.P. Society Islands
Teahupoo, Tahiti Iti
Pigeon Beach St. Lucia
- Style: Laid Back
- Gear: Cabrinha, North
- Brand Affiliation: None
Postby mpitre » Thu Jun 13, 2013 1:59 pm
Has anyone ever tried helium in a kite? I know it's not practical or safe, but I'm curious to see a video of how it fly in light wind?
-
pj sofine
- Very Frequent Poster
- Posts: 675
- Joined: Thu Jun 16, 2011 2:21 am
- Kiting since: 2001
- Style: silly
- Gear: naish torch 12m,9m,epic renegade 6m,9m,screamer 12m. ug styx, skillet
- Brand Affiliation: None
Postby pj sofine » Thu Jun 13, 2013 2:07 pm
Oh boy! Another kiter in a light wind /offseason funk!

-
joriws
- Very Frequent Poster
- Posts: 632
- Joined: Wed Nov 24, 2010 11:03 am
- Kiting since: 0
- Gear: Flysurfer, HQ, LF, Nobile, North, Ozone
- Brand Affiliation: None
Postby joriws » Thu Jun 13, 2013 2:14 pm
You cannot dive the kite

-
Oleg
- Frequent Poster
- Posts: 204
- Joined: Fri Jun 27, 2003 9:22 pm
- Kiting since: 0
- Brand Affiliation: None
- Location: Russia
-
Contact:
Postby Oleg » Thu Jun 13, 2013 2:18 pm
Please, not again! This is repeated every year ....
-
Starsky
- Very Frequent Poster
- Posts: 4374
- Joined: Mon Apr 19, 2004 12:12 pm
- Kiting since: 0
- Brand Affiliation: None
- Location: Ontario
Postby Starsky » Thu Jun 13, 2013 2:23 pm
do a search
-
chemosavi
- Very Frequent Poster
- Posts: 1530
- Joined: Wed May 21, 2003 12:07 pm
- Kiting since: 2002
- Style: If Ghengis Kan, I kan too!
- Gear: Grass fed Carbon Fiber
- Brand Affiliation: Peace in the Middle East
- Location: NW Pacific
Postby chemosavi » Thu Jun 13, 2013 3:53 pm
Studies with gas filled kites conducted at the University of Mellencamp in Dearborn, Michigan showed that a high concentration of METHANE gas allowed the kites to perform in ways previously thought impossible.
New tricks, previously extremely difficult, became the norm.
Researchers connected tubes to the anuses of hundreds of cows and volunteer grad students to collect a substantial amount of a renewable gas supply which coincidentally also reduced the CO2 emissions from participants. An unexpected plus.
The study was abruptly terminated when a participant attempted to light up a big doobie and blew up the facility.
-
plummet
- Very Frequent Poster
- Posts: 5879
- Joined: Sat Aug 29, 2009 11:25 pm
- Kiting since: 33
- Local Beach: EE
- Favorite Beaches: NZ
- Style: Terrain riding
- Gear: Old wornout ozone.
Plummet hydrofoil and mutant
- Brand Affiliation: None
Postby plummet » Thu Jun 13, 2013 7:44 pm
lets work it out.
what is the internal volume of your bladder?
Lets assume a 10m kite with 5 struts. The LE is on average 15cm x 7m long.
The struts a 8.5cm x 1.2 long.
Internal volume for the LE is 123 litres
internal volume for struts 34 litres
Total of 157 litres
What do we pressurise the bladder to? lets say 8 psi.
That's 1.55 atmospheres.
157L x 1.55 = 244L
Air weights 1.2kg/1000 litres approx.
(244/1000)*1.2 = 0.293 kg = 293gram
293grams is the weight of the air insite the kite.
Helium weighs 0.1664/1000litres approx
(244/1000)*0.1667 = 0.041 kg = 41grams
293-41 = 252 grams savings.
-
edt
- Very Frequent Poster
- Posts: 4934
- Joined: Fri Jul 16, 2010 6:27 am
- Kiting since: 2010
- Local Beach: ford lake Michigan
- Gear: slingshot liquid force wainman pansh naish north cwb burton
Postby edt » Thu Jun 13, 2013 7:57 pm
good calculation but your estimate of bladder volume seems a bit off, should be less than 100 liters, and less than 200 grams weight savings about the weight of a cup of water.
-
Metaphor_
- Medium Poster
- Posts: 72
- Joined: Wed Apr 25, 2007 1:56 am
- Kiting since: 0
- Brand Affiliation: None
Postby Metaphor_ » Thu Jun 13, 2013 9:32 pm
-
zob
- Frequent Poster
- Posts: 454
- Joined: Tue Feb 24, 2009 1:43 pm
- Kiting since: 2006
- Local Beach: Grado Pineta (IT), Fossalon (IT)
- Style: Freeride, strapless hooked-in
- Gear: FS S3 19m2 DLX, S3 CE 12m2 DLX & S4 8m2 DLX
Homemade Surf & Snow Boards
MBS Pro90
- Location: Iv.G.-Slovenia
-
Contact:
Postby zob » Fri Jun 14, 2013 6:00 am
Helium is used for testing of pressure equipment, since it leaks faster than air and trough smaller holes, so you can detect very small lekages. So the first thing that should be tested is how good valves hold the pressure at 8 psi. If there are any small leakages in the blader (lets say your kite gets soft after 2 hours), one point inflation system connection points (specially Octopus) would leak out you kite in no time. I wonder if you could even come to 8 psi.
However I do not understand what should not be safe about helium?!
Return to “Kitesurfing”
Who is online
Users browsing this forum: Google [Bot] and 15 guests