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Old 10-12-2011, 06:05 PM   #1
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Gasoline motor

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I know nothing about these large gas motors that some of the larger planes use. I have a contact that can get me the wacker or leaf blower engines. So I was wondering if they were the same engines that are used in our larger planes. If they are what modifications if any are there yo do to them. Also what type of money would they going for new.
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Old 10-12-2011, 06:13 PM   #2
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Re: Gasoline motor

Something I forgot to mention was that these are all 22cc ones from Ryobi that were refurbished at the manufacture and come with a 90 day warranty
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Old 10-12-2011, 06:16 PM   #3
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Re: Gasoline motor

When giant scale got started many moons ago, the first gasoline engines were from chain saws, weed whackers and so on. These were industrial engines modified and pressed into service for aircraft use.

As things developed, numerous people began using the esiting pistons, cylinders, carbs and a few other parts while making their own crankcases and in some cases crankshafts.

Later on, we started getting specialty engines designed more specifically for model aircraft use. Magnetos were droped for electronic ignition. Carbs moved to the rear from the side of the piston. Weight reduction and power increase were the major driving factors. Of course, along with that came much higher prices.

Now most of the engines come from other than industrial applications, although there are still some conversions being done, They are not competitive in terms of weight or power output. They are however much less costly.

It's like anything else. All items are not created equally. You decide which way you want to go depending on what you need, what your budget is and what the various options offer.

So as you can see, there really is no comparison between what is currently common for model aircraft gasoline engines and those the conversions that came from the leaf blowers, weed whackers and chain saws.
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Old 10-12-2011, 06:18 PM   #4
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Re: Gasoline motor

Hey Bob,
I personally would save up the pennies for an aircraft engine and not try to convert one like you mentioned. You need to make up a prop adapter at the minimum. They tend to be heavier also.With that style engine mounts and things seem to be hit and miss. What airframe are you putting it in?
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