My bad, I thought it was the original video from boatstogo, until I watched Briskites,,, HA, HA,,,spork wrote:My comment was directed at the Briskites LeafBlower(tm) kitepump. But the boatstogo kitepump does look quite nice also.
As it happens, I've repaired and modified probably a few dozen of the Scoprega pumps. I'd love to see either company offer a pump without the automated stuff. Just a toggle switch for off-low-high pressure, and a pressure gauge. I'd also love to have a source of repair parts.
Ultimately, I don't care about magical properties or cost or whether it's dry, damp or flavoured with bullshit ... I'd be using my own compressor to compress REGULAR OL' air so ...spork wrote:Nonsense. If you're going to compare air with Nitrogen, compare both dry. You're not going to compress and dry your own Nitrogen - are you? So compare air from a dive shop with Nitrogen from a welding shop. I'll bet the air will be cheaper ($3 - $7 for a 3000 psi fill of a full tank), and work every bit as well as the Nitrogen.Kamikuza wrote:... I think dry air is irrelevant in this discussion. Or rather, moist air is relevant ...
The point was that Nitrogen had all these magical properties. It doesn't.
Kamikuza wrote:What I want to know is - will filling up a kite's delicate bladder with a shot of compressed REGULAR OL' air be harmful in anyway?
Please do not start designing nuclear plants.Kamikuza wrote:You mean how the tyres deform due to inertia? Derp.SBBeachbum wrote:(Ever watched a burnout at a drag race?)
I'm not looking to reignite the shit-storm but ...... I think dry air is irrelevant in this discussion. Or rather, moist air is relevant ...spork wrote:Let's compare apples and apples. How do you think dry air compares with dry Nitrogen for pressure stability?
For a DIY inflation system using a bottle of compressed gas, a reasonable assumption would be that it would be filled up from a common-or-garden compressor and would be full of ... regular air, water vapour and all.
What I want to know is - will filling up a kite's delicate bladder with a shot of compressed air be harmful in anyway?
I've seen guys fill kites with a compressor at shops etc so SURELY the answer is yes ...?
NO2 is also not part of regular air and therefore irrelevant for this discussion. (Unless we are talking heavy smog which does contain trace amounts of dinitroustetroxide)edt wrote: not all gases obey boyle's law for instance, no2 nitrogen dioxide does NOT obey boyles law what happens is that there is a complicated process where some of the no2 becomes n2o4 so that the pressure remains constant.
So that's another "I have no idea" then. Thanks for your inputSBBeachbum wrote:Please do not start designing nuclear plants.
Given that the Scoprega pump IS a compressor, and that's the only thing I've used for about the last 7 years, I'd say you're right.plummet wrote:you shouldn't have a problem inflating a kite with a compressor as long as the velocity is not too high and you have regulation or relief valve set a 9psig
... that's what I figured, plummet, just wanted to know for sure I'm sure it's something I'll never get around to anyway and will just keep using pumpsplummet wrote:Velocity too fast at the fill point could cause damage to the bladder. if you used a standard kite pump hose then the velocity would be fine by the time you get to the kite. if you use a small oriface air gun then the velocity could be high enough to cause dammage.