There are NO reason to avoid 2 strokers for "sports flying".

There is a tendancy to put certain engines on certain planes.

My rough rule of thumb, e.g. what I usually do.

.32 sized and smaller - Electric
.40 through .60 - 2 strokers
.60 through .90 - Toss up. Depends upon what you want to spend and your target. 2 or 4 strokers work equally well in this range.
.90 through 1.60+ - Four strokers
1.80 and larger - Gas

2 strokers have a better cost per performance ratio up to a point. Beyond that four stroke engines give you power and MUCH better fuel consumption figures which ultimately result in a lower operating cost to you... again this is up to a point.

Once you get into larger planes, even a four stroker will seem to be ingesting relatively expensive glow fuel at a high rate. One of the reasons that gas is preferred.


You will get the "four strokers can swing a bigger prop" arguement, which is valid, but at the same time you can usually afford a much more powerful 2 stroke engine for the same amount of money in the smaller sized planes...

It's up to you to decide how to power the plane.