I've never seen or heard of using bleed air from one aircraft to start another. There is an automatic one way check valve in the connector for external air that prevents air from escaping, it only allows air to enter. Normally an external air supply comes from a small jet engine on a wheeled cart that can be towed around.
What happens in Alaska is whole different deal though. I suppose a connector could be built that could hold the check valve open on a plane so it could supply air but it would be extremely dangerous.
Starting an engine after one is running can be done by cross bleeding using an isolation valve that's used for that purpose. No hose required.
The 737 max 8's that Southwest flies to Hawaii have to go through engine cooling procedure that AaronS talked about and it doesn't stop them from operating here.
Hawaiian has a lot more flights but they could adapt.
The Hawaiian 717's are really economical to operate and are perfect for the market.
Delta got a whole fleet of 717's from Southwest that they wanted to dispose of after they bought Air Tran. Delta likes them so well that they bought up almost every 717 in the world. They now operate 88 of them.
What happens in Alaska is whole different deal though. I suppose a connector could be built that could hold the check valve open on a plane so it could supply air but it would be extremely dangerous.
Starting an engine after one is running can be done by cross bleeding using an isolation valve that's used for that purpose. No hose required.
The 737 max 8's that Southwest flies to Hawaii have to go through engine cooling procedure that AaronS talked about and it doesn't stop them from operating here.
Hawaiian has a lot more flights but they could adapt.
The Hawaiian 717's are really economical to operate and are perfect for the market.
Delta got a whole fleet of 717's from Southwest that they wanted to dispose of after they bought Air Tran. Delta likes them so well that they bought up almost every 717 in the world. They now operate 88 of them.