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Thread: Highest Quality & Reliability 90-size Helicopter Engine
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Old 07-28-2017 | 06:11 PM
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the Wasp
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the OS is a very fine engine, but I would say that "I" think the YS has a bit higher quality to it, or maybe it's just the detailing.. I can't say what one has more power,, buy ether one and you will have one of the top 91 Heli engines

BTW, if this is your first Heli, I would recommend that it would be smarter to buy a 50/55 size, 90's are real monsters for a first Heli !!

Jim
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