<span style="font-size: small">Iam new when it comes to Nitro planes, so let me see if Iunderstand correctly.
The 91FX is not a great 3D engine unless you can find a 3 needle carb like the 7L (rare).
Is this because this engines power is mostlyin the higher end of the throttle range( 3/4 and above) and many 3D planes utilizethe lower throttle range (0- 3/4), and with only a 2 needle carb its harder to tune the midrange where most 3Dpilots use?
Is 4 stroke preferred because of their ability to make power at a lower rpm with more torque swinging a bigger prop moving more air, instead of moving air faster?
Forgive my limitedknowledge when it comes to2 stroke vs. 4stroke, but this is the reason Ihave come to you who have the knowlegde soIcan educate myself.
Aloha,
Les</span>