Engine Question
 

What is the difference between a FX, AX, or whatever X they may have? Also what does the number in front of it mean? is it the power or the size? or a little bit of both? for example: .20 .40 .60 .90.??

I can seem to find a thread on engine basics

Thanx

RE: Engine Question
 

The letters are manufacturer designations. Some have ball bearing, some are ringed where others are ABC (aluminum, brass, chrome) construction.

The number is the displacement in cubic inches. a .50 or 50 is 1/2 cubic inch cylinder displacement.

RE: Engine Question
 

Try this http://www.masportaviator.com

Click PRI FLY which is primary flight training.

There you should see lots of beginner articles including Engines 101 and Engines 101 part 2.

RE: Engine Question
 

Excellent site, Thank you.

RE: Engine Question
 

My pleasure. Where are you in Jersey? I grew up in Philly and spent most summers in Ocean City NJ.

RE: Engine Question
 

hey, Union City NJ.. 10 min from NYC.. Not too far from philly.:D

RE: Engine Question
 

I've only seen AX, FX, and SX on the OS engines...

The AX and FX seem to be their high quality "ABL" (Advanced Bi-Metallic Liner) engines with ball bearings. The SX engines appear to be bored & stroked versions that have higher displacement in the same size engine (.50 SX is same size as a .46 AX/FX, .32 SX is same size as .25 FX), and the .50 SX is actually a ringed engine, instead of an ABL engine like the .46 AX/FX. OS also makes an LA series, which I believe are lapped engines (no liner) with bushings (instead of ball bearings).

RE: Engine Question
 

The LA series are ABN, bushing engines.