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On 29 June 2014 18:38:11 CEST, Dale <rdalek1967@×××××.com> wrote: |
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>Peter Humphrey wrote: |
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>> Of course! I missed the Spitfire, so I don't know how high it flew, |
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>but the |
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>> Hurricane sound from no more than a couple of hundred feet or so was |
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>among the |
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>> two or three most impressive of my life. Both planes have V12 |
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>Rolls-Royce |
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>> Merlin engines (I think). As each cylinder fired, the sound pressure |
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>went up |
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>> extremely fast at the start of the exhaust beat, suggesting huge |
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>exhaust |
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>> valves, and the deep-throated roar was ... just ... beyond |
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>description. |
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>> |
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>> The only engine to come close was an extraordinary 1/3 scale model of |
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>a nine- |
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>> cylinder radial aero-engine I saw years ago at a national model |
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>engineering |
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>> exhibition. The crankshaft was anchored to the frame, and the entire |
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>engine |
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>> and prop rotated around it. That's what you call air-cooling! |
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>Absolutely |
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>> fantastic when he fired it up once an hour or so! |
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> |
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>Yep. Some of those prop engines are very powerful, maybe not so |
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>efficient tho. Anyway, they sure do make some noise even if the engine |
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>is small. I don't think they have mufflers or if they do, it isn't |
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>much |
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>of one. I also think they burn methanol or something too. I'm not |
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>sure |
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>and it may even vary from one engine to another. I don't think they |
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>burn plain old gas like cars. |
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|
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If you are talking about model engines. The bigger ones run normal petrol, just like cars, lawn mowers, chain saws,..... |
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|
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>>> I live about 4 or 5 miles from a air force base here. We have |
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>mostly |
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>>> training type planes that fly over us but on occasion, we have |
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>something |
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>>> really big here. We have even had the space shuttle land there a |
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>few times. |
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>>> The B2 bombers have been there as well. |
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>> Sounds like a good place to live! That's not Edwards, is it? I drove |
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>up to the |
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>> gates once to see what they'd say. They were actually quite polite. |
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> |
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>I'm close to Columbus Air Force base in Mississippi. It has a huge |
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>runway. It is one reason the space shuttle lands here. It takes a |
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>long |
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>runway to land and take off when carrying that thing. I say space |
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>shuttle, it's mounted on the back of a 747 I think. What's more neat |
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>tho is the big bombers. My Dad several decades ago was doing a |
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>contract |
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>job at the base. For some reason they had the really big bombers out |
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>there with armed military guards everywhere. They wouldn't let anyone |
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>even near those things. He could see them real good tho. He said "it |
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>looked like death, just plain death". Later on my Dad found out it was |
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>loaded up with bombs that they were moving somewhere else. Death was |
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>more accurate than he thought. |
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> |
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> |
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>> |
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>>> I have heard some of the large planes when they start their engines |
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>and |
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>>> like I said, I'm several miles away and it is loud. Video just |
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>can't |
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>>> give you that even with a good sub-woofer. |
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>> Even that wouldn't help much, I think. You'd need something that can |
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>handle an |
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>> extremely rapid wave-front and high volumes. As you said - you had to |
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>be |
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>> there. |
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> |
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>Yep, speakers can only do so much. |
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> |
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> |
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>> |
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>>> Thanks for the link. |
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>> My pleasure. I don't know when we'll get the Hurricane one - the man |
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>with the |
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>> camera just put a two-word entry on Twitter this morning: "Hashtag |
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>HEADACHE" |
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>> |
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> |
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> |
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>Oooops. |
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> |
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>Dale |
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> |
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>:-) :-) |
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|
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|
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-- |
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Sent from my Android device with K-9 Mail. Please excuse my brevity. |