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#81
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Hyabusa flat 8
wrote but ANY 2 stroke engine, to me, is suspect. I know, in theory they are almost bulletproof because they have so few moving parts - but in practice they are fragine. Heck, I won't even take my chainsaw up a ladder, why would I fly behind one???? TBO on the 2 stroke stuff is PITIFUL. Yep. Yet they touted that crap as AIRWORTHY. I wonder how many people are pushing up daisies, because of that attitude. -- Jim in NC |
#82
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Hyabusa flat 8
We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember jan olieslagers saying something like: If you are really curious about diesels in airships, consult www.dair.co.uk - that engine scales down the idea behind the JuMo diesels. I recall a Rolls-Royce WW2 service manager told me he was utterly gobsmacked when he saw the Krauts were using diesels in some of their bombers. At the same time, he was quite impressed, although the diesel story was spread around as some sort of negative propaganda - weight, lack of power, etc. |
#83
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Hyabusa flat 8
We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember saying something like: Yup, Thielert engines are used by Diamond aircraft. http://www.centurion-engines.com/ Diesel engines running on aviation kerosene. Only thing though - sooner or later, you can absolutely guarantee some numpty ******* will fill it and run it (albeit briefly) on petrol. TBO, iwt, for that, surely? |
#84
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Hyabusa flat 8
On 9 Mar, 07:49, Grimly Curmudgeon
wrote: We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember jan olieslagers saying something like: If you are really curious about diesels in airships, consult www.dair.co.uk- that engine scales down the idea behind the JuMo diesels. I recall a Rolls-Royce WW2 service manager told me he was utterly gobsmacked when he saw the Krauts were using diesels in some of their bombers. At the same time, he was quite impressed, although the diesel story was spread around as some sort of negative propaganda - weight, lack of power, etc. It wasn't the most successful application, it must be admitted. Obviously you'd have had the inherent reliability of a diesel compared with the petrol engines of the era (the Junkers 86 was a pre-war design), but the criticisms of weight and lack of power would have been valid, and for a warplane, lack of power is an absolute no-no[1]. There were some German wartime flying boats that used diesel engines, too. Rather successfully, actually, but then flying boats can't really be classed as combat aircraft, no matter how many defensive guns they carried. The R101 airship used diesel engines, which were then really untried technology as far as aircraft went, and they were unsuccessful. Had the thing not crashed and the British airship programme continued, it's almost certain the R101 would have been re-fitted with petrol engines. The Graf Zeppelin used spark-ignition engines, but fuelled with natural gas called Blaugas, stored uncompressed. This was a bit like propane, and was named after its inventor rather than its colour. The beauty of Blaugas for airships was that it weighed more or less the same as air and so as the fuel was used up, it didn't affect the trim of the airship. I think the engines also ran on, and the craft carried, petrol but I cba to Google right now. [1] Well, for any aircraft, I'd have thought[2] [2] And motorcycle :-) |
#85
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Hyabusa flat 8
TOG@Toil schreef:
but the criticisms of weight and lack of power would have been valid, Would they really? Have you ever checked the power/weight ratio of the JuMo diesels? |
#86
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Hyabusa flat 8
On Mar 9, 5:44*am, "TOG@Toil" wrote:
On 9 Mar, 07:49, Grimly Curmudgeon wrote: We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember jan olieslagers saying something like: If you are really curious about diesels in airships, consult www.dair.co.uk-that engine scales down the idea behind the JuMo diesels. I recall a Rolls-Royce WW2 service manager told me he was utterly gobsmacked when he saw the Krauts were using diesels in some of their bombers. At the same time, he was quite impressed, although the diesel story was spread around as some sort of negative propaganda - weight, lack of power, etc. It wasn't the most successful application, it must be admitted. Obviously you'd have had the inherent reliability of a diesel compared with the petrol engines of the era (the Junkers 86 was a pre-war design), but the criticisms of weight and lack of power would have been valid, and for a warplane, lack of power is an absolute no-no[1]. There were some German wartime flying boats that used diesel engines, too. Rather successfully, actually, but then flying boats can't really be classed as combat aircraft, no matter how many defensive guns they carried. The R101 airship used diesel engines, which were then really untried technology as far as aircraft went, and they were unsuccessful. Had the thing not crashed and the British airship programme continued, it's almost certain the R101 would have been re-fitted with petrol engines. The Graf Zeppelin used spark-ignition engines, but fuelled with natural gas called Blaugas, stored uncompressed. This was a bit like propane, and was named after its inventor rather than its colour. The beauty of Blaugas for airships was that it weighed more or less the same as air and so as the fuel was used up, it didn't affect the trim of the airship. I think the engines also ran on, and the craft carried, petrol but I cba to Google right now. [1] Well, for any aircraft, I'd have thought[2] [2] And motorcycle :-) Keep in mind that while the Jumo 205 was a successful diesel aero engine, It was built at a time when titanium and other high strength, light weight alloys weren't available. Aero diesels under development today use titanium in many parts and high strength aluminum alloys elsewhere to achieve a much better power- to-weight ratio. Most better 1LB/HP. All will use universally available JET A rather than diesel fuel - although they can use that too if the temperature is high enough. To return to the subject, the stock Hyabusa uses titanium valves and rods. |
#87
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Hyabusa flat 8
On Sun, 8 Mar 2009 23:03:51 -0500, "Morgans"
wrote: wrote but ANY 2 stroke engine, to me, is suspect. I know, in theory they are almost bulletproof because they have so few moving parts - but in practice they are fragine. Heck, I won't even take my chainsaw up a ladder, why would I fly behind one???? TBO on the 2 stroke stuff is PITIFUL. Yep. Yet they touted that crap as AIRWORTHY. I wonder how many people are pushing up daisies, because of that attitude. If you totally ovehaul a Rotax 2 stroke every 300 hours and are VERY carefull with what fuel and oil you run, they are unlikely to kill you. Go 500 hours, run ethanol fuel or the wrong oil, have the mixture off - and it's just a matter of WHEN. |
#88
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Hyabusa flat 8
bildan wrote:
To return to the subject, the stock Hyabusa uses titanium valves and rods. Hayabusa, ffs, Hayabusa. -- BMW K1100LT Ducati 750SS Honda CB400F SH50 Triumph Street Triple If you don't know what you're doing, don't do it. Workshop manual? Buy one instead of asking where the free PDFs are chateau dot murray at idnet dot com |
#89
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Hyabusa flat 8
"TOG@Toil" wrote:
The R101 airship used diesel engines, which were then really untried technology as far as aircraft went, and they were unsuccessful. Had the thing not crashed and the British airship programme continued, it's almost certain the R101 would have been re-fitted with petrol engines. The thinking apparently was that the diesel was less flammable (for whatever reason fire risk was at the back of the minds of the designers). Although as I understand it this was all to no avail since there were also separate engines for starting the diesels, which were petrol. You couldn't make this stuff up. |
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