robertovillate wrote:Someone suggested it takes 50 pump strokes to inflate a big kite...Not sure what kind of pump he's using but I would say more like 100+ strokes to get proper pressure in a 12m or larger kite.
not 50 pumps on a large kite to get to 8psi, 50 pumps to to "loosely inflate" i.e. you are pumping your kite up to 1 bar = 1 atmosphere or 14.5 psi or 0 psi relative to local air pressure. The kite when loosely inflated will not hold its shape at all but it will have air in it.
Then to get to 8psi, you want to pump 8/14.5 times however much it took to loosely inflate, or 28 more pumps more for 78 pumps to get to 8psi, it's a convenient way to calculate air pressure of your kite without a gauge. If you kite is in fact loosely inflated at 50 pumps and you pump it 100 times you are putting in a pressure of 14.5 psi. That is an extremely hard kite.
Most kite manufacturers ship terrible pumps with bad leaky valves or pumps that only last a week or two before they start leaking. I've had great luck with this $11 pump from walmart the "air head" pump, best hand pump I've ever had.