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Large Engines Discuss Engines Used on Giant Scale Aircraft. Gas/Glow, as long as they're big! |
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06-03-2010, 07:01 PM | #2 |
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Re: help for quadras
Try Alberta's Littlest Airport. They sold a very large percentage of them through the 80's. And still advertise in the back of the MAA Mag.
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06-03-2010, 11:04 PM | #3 |
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Re: help for quadras
The only definitive way is to measure the bore.
The serial numbers don't mean much - some were put on by dealers and not the factory. If it has 2 piston rings, it is a Quadra 40 - otherwise if it has one ring, it could be a Quadra 35, Quadra 40, or a Quadra 42. Grizak
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06-04-2010, 09:07 AM | #4 |
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Re: help for quadras
To find displacement, take the muffler off. Stick a popsicle stick across the cyl. and push the piston up against it so it makes a mark. Measure across the mark. Q35 is 37 mm or 1.44 in.
Q42 is 40 mm or 1.57 in.
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06-05-2010, 02:09 PM | #6 |
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Re: help for quadras
No problem. When I worked on them, I stamped the size on the bottom.
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