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gary	31/05/2021 06:12:44
164 forum posts 37 photos	hi john, are we going to get a build on the redwing ?
not done it yet	31/05/2021 06:36:57
7517 forum posts 20 photos	Finished? Pleeese lets see/hear it running! I’ve enjoyed watching your progress on the engine. At first look, I thought the red wing might be a plane to fit it in.🙂 How would the steam be generated for it? I don’t expect they had to carry half a tonne of coal for a long distance flight.🙂 What speed, and diameter, prop would be required?
John Purdy	31/05/2021 18:31:23
431 forum posts 252 photos	Dave I haven't decided. Apparently there have been quite a few build threads around but I don't think there has been one on this forum. What do people think? NDIY Sorry, there won't be a video of it running as I don't have any way of making one. There won't be an aircraft either as it is too big for a model and too small for a real one! The original swung a 4 bladed, 50 1/2" dia. prop at 2000 RPM generating 70 HP at 300 PSI steam pressure. Mine runs at ~800 RPM at 60 PSI. At that speed it is starting to vibrate, so to get anywhere near 2000 the crank balancing would have to be changed. The write up on the original makes no reference to the steam generator, but to develop 300 PSI within reasonable weight constraints I suspect it would have been a flash steam unit fired with liquid fuel. John

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