"No data on air propellers was available, but we had always understood that it was not a difficult matter to secure an efficiency of 50% with marine propellers"

This quote by Orville Wright recommends that the performance of air props was unknown at the time, however that aquatic propellers were understood to be able to achieve a performance of 50%. This implies that the modern technology for air props was not as advanced as that for aquatic props, and that the efficiency of air propellers was not yet recognized. It also suggests that the innovation for aquatic props was advanced, which it was not difficult to achieve an efficiency of 50%. This quote highlights the relevance of research and development in order to development technology and boost effectiveness. It also shows the significance of recognizing the distinctions between different kinds of props and also the value of recognizing the modern technology behind them. By comprehending the technology behind various sorts of props, engineers can create extra effective propellers and also enhance the performance of air and aquatic propellers.