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Piper84
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would an air check valve help lift by preventing air presure backup through the lift fan?
The lift fan is a compressor that generates a downward flow and so should have no back flow. I would expect a continuous smooth flow of air would be necessary to maintain the continuous flow that is lost from below the skirt. Any stop-start flow condition would stall and greatly disrupt the flow through the compressor, it would lead to a total loss of compressor efficiency.Piper84 said:would an air check valve help lift by preventing air presure backup through the lift fan?
Piper84 said:Closer tolerance in fan and ducting may help.
Piper84 said:Any one think of using an outrunner motor? Thay are light wt. and the one I'm looking at can put out 25 hp but requires 150 to 200 amps at 70 v max ECS control mod. This may be a good lift/thrust motor. Would need an onboard generator for power. I have used micro wave transformers rewound as a step down transformer For other projects may try it for this application. Any input?
Any electrical lift system should avoid transformers and low frequency power. It needs to use aircraft technology = 400Hz three phase alternators and switching power controls. Why have an internal combustion engine plus an alternator and a motor when the ICE could do the job without the added mass and inefficiency of the electrical components?Piper84 said:This may be a good lift/thrust motor. Would need an onboard generator for power. I have used micro wave transformers rewound as a step down transformer For other projects may try it for this application. Any input?
The air check valve is designed to prevent air pressure backup in lift fans. It allows air to flow in one direction, but not in the opposite direction, ensuring that the lift fan operates efficiently and safely.
An air check valve works by using a one-way valve mechanism that opens when air is being drawn into the lift fan and closes when the fan is turned off. This prevents backflow of air, maintaining proper air pressure in the lift fan.
Having an air check valve in lift fans is crucial to prevent air pressure backup. If the air pressure were to build up in the fan, it could cause damage to the fan components and potentially lead to a malfunction or failure.
Air check valves should be inspected and maintained regularly, at least once a year or more frequently if the lift fan is used frequently. This ensures that the valve is functioning properly and helps prevent any potential issues with air pressure backup.
Yes, air check valves can be used in various applications where there is a need to control air flow in one direction. They are commonly used in pneumatic systems, water pumps, and HVAC systems to prevent backflow and maintain proper pressure levels.