Model Forum / Radio Controlled / Air Models / February 2007

Just ready to install an engine in a Minicraft Javelin 90.
A review model in a magazine used an ASP120 - in my view heavy. I wonderd
what any one thought of an ASP91 or SC91 which is a good deal lighter and
not that much less in power.
Alternatives are a Saito FA91S and a Saito FA-100 and in the OS range a OS
FS91 Surpass and the OS FS91P (pumped). I considered the one with the
electronic injection but couldnt, for the life of me, work out where the
unit would have to be situated on the plane as I guess it need access. Not
sure though and if it is worth the money either!
I guess the O.S. 120 engines would be on the heavy side too.
Obviously all my choices are four strokes but the Saito seems lighter (which
is what I want with this model) but has more vibration (from reading
reviews) and needs more running in than the O.S. On the other hand O.S.
engines are heavier and less powerfull but will nearly run straight out the
box with little running in time required.
Can anyone help with this dilema.
Oh yes. the purpose of the model is to practice the F3a sportsman and
standard schedules, a consideration not to be missed.

The other thing is: what props would you recomend with any suggested engine?
Pattern planes allways seem to have high pitches but I always think thins is
contrary to what is required. (IE a steady speed in up and downlines) Not
overall speed.