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P a g e
Edge 540/2.6m
Servo arms:
The longer the servo arm the more pressure there is on the
servo. If you are not into full 3D consider using 1.25” arms, you
will still get plenty of surface travel, just not the extreme
movement. Extreme surface travel is mostly only handy for post
stalled manoeuvres like rolling harriers, very flat spins and the
likes. But having extreme throws comes at a price, the possibility
of high speed flutter is increased, and servo resolution is
compromised for IMAC/sports flying.
If you are intending to use your Edge for IMAC and some
general sports flying the 1.25” are ideal, they also give enough
travel for some pretty good 3d work, along with a pretty
blistering roll rate. But if 3D is your thing and you want all the
travel you can get, then 1.5” arms can be used, but you need to
keep in mind that the possibility of high speed flutter is
increased, and you should take all possible steps to eliminate
this possibility. Using a 30kg servo would be considered a
minimum when using 1.5” arms.
Engine Choices:
There is a multitude of engines available for you to use in your Edge 540. As mentioned before a 150cc engine will
easily fit in the engine bay. However the airframe is more suited to today’s current crop of 100cc to 120cc engines.
We used a DA120 in the process of producing this manual, and we have to say the flight performance is
staggering, not sure why you would need a 150!
But if you already have a 150 just sitting in the workshop needing a new home, well, be our guest!