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120AX

Old 12-22-2006, 10:22 PM
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Warby
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Default 120AX

On the OS web site, they advertise the 120 AX fitting in the same space as a 91.
Which 91 are they referring to? Is it the 91 FX, which is the same size as a 61 FX?
Old 12-26-2006, 12:38 PM
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Bax
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Default RE: 120AX

Same basic space (volume), but the bolt pattern isn't the same.
Old 12-26-2006, 06:11 PM
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Default RE: 120AX

Thank You Bill,
Mark
Old 03-02-2007, 06:19 PM
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dhal22
 
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Default RE: 120AX

did i read that right? the 120 ax will fit on a mount where there was once .61 fx? except the bolt pattern of course.
Old 03-05-2007, 11:41 AM
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Default RE: 120AX

No. The O.S. Max 1.20 AX has about the same overall volume as the .91 FX...that is, it takes up about the same amount of space in the airplane. The bolt pattern is very different.

The .91 has a crankcase that's 42.6 mm wide, the 1.20 is 46.5 mm.

The O.S. website states that they are "virtually identical" in size: http://www.osengines.com/engines/osmg0650.html

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