OS .46LA install
#1
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Join Date: Oct 2005
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OS .46LA install
Hey guys
I am trying to install a OS .46LA into my sig 4 star 40. Sig says to use 6/32 screws but the engine hole is 4/40. Should i drill them out or are the 4/40 gonna hold up?
thanks for the help
I am trying to install a OS .46LA into my sig 4 star 40. Sig says to use 6/32 screws but the engine hole is 4/40. Should i drill them out or are the 4/40 gonna hold up?
thanks for the help
#3
RE: OS .46LA install
G'day Mate,
4, 4-40 UNC bolts & nylock nuts should be plenty to hold it on, although an OS 46AX, has holes just right for 6-32 bolts, I have no 46LA's so I don't know what size holes are in the engine mounts, but I'm sure 4-40 would be OK, but you can drill them out if you feel the need.
OS recommend 3 to 3.5mm bolts. 3mm is pretty close to 1/8"
4, 4-40 UNC bolts & nylock nuts should be plenty to hold it on, although an OS 46AX, has holes just right for 6-32 bolts, I have no 46LA's so I don't know what size holes are in the engine mounts, but I'm sure 4-40 would be OK, but you can drill them out if you feel the need.
OS recommend 3 to 3.5mm bolts. 3mm is pretty close to 1/8"
#4
My Feedback: (1)
RE: OS .46LA install
Here's another tip if you've never run an OS LA series motor before. For a significant power boost, remove the baffle from the muffler. To do this, unscrew the bolt that runs front to back through the muffler. The baffle is the cone shaped device inside. Take it out and reassemble.
It will make it a little louder (not much), but the power increase is tremendous. I was at the field a few weeks ago and someone was making a maiden with a .25 LA that would barely get the plane off the ground. I suggested removing the baffle. For comparison purposes, he tached it before and after. He gained 1200 RPM!
-Scott
It will make it a little louder (not much), but the power increase is tremendous. I was at the field a few weeks ago and someone was making a maiden with a .25 LA that would barely get the plane off the ground. I suggested removing the baffle. For comparison purposes, he tached it before and after. He gained 1200 RPM!
-Scott