Underside of forward cowling. Note landing gear attachment slot (above left) with plastic reinforcement around it and cowling air exit for motor and battery cooling. Close up of empennage (above right) and tail wheel attachment. Note the molded plastic reinforcement and pin hinge to distribute tail wheel loads. The
Sbach 342 3D and earlier Sukhoi 26M (below left) side by side comparison. Sbach and earlier Sukhoi 26M empennage details (below right). Note improved rudder attachment for heavier Sbach and graphite spar on elevator for strength during aerobatic and 3D flying.
Parkzone’s Sukhoi 26M came with the ubiquitous flight battery and the small bat- tery operated charger purchased a few years earlier. This is another hint that this BNF model is another step above the Sukhoi 26M.
The battery you will need to buy is a 180 mAh 2-cell Li-Po and also a charger if you do not already have one. I have an Astro Flight 109 Li-Po charger and also had a balancing unit already, so all that was needed was to buy the EFLA700UM battery charging adapter cord. As you can see from the pic- tures, the connector on the EFLB1802S20 battery is smaller than the regular balanc- ing connector for a 2-cell pack, but a good deal bigger than the one used on the little single-cell batteries that the micro R/C com- munity is accustomed to.
For me, this meant a new plug and adapter cord (EFLA700UM). There is also one other item you might want to get while you are at it for the flying field. Nothing spoils the fun like a broken prop. This model uses the same part number prop as the Beast and Carbon Cub models and is P/N EFLUP050275. There are several conven- ient cubby holes for one of these in the box which the model came in and it is well worth having an extra one on hand just in case. With the battery charged you are ready for the binding operation. Setting up the transmitter only took about a minute to run through the actual procedure that is out- lined in the instructions on page 5. It proved very simple and there was no need for servo
FLYING MODELS
reversing or other changes required when using the DX6i transmitter. It was all very simple and straightforward.
The control surface alignments were also checked to see if any tweaking would be nec- essary and at this point. There was no per- ceived need for this operation. If your sur- faces do not zero out the procedure to adjust them is detailed on page 6 of the instruction manual. A blip of the throttle to check this function showed that the Sbach’s propulsion system would be generating a lot more thrust than the Sukhoi 26M. You will also notice that there seems to be a lot of chatter and “noise” from the aircraft after sitting and allowing it to stabilize and then picking it up. As you move the plane around suddenly, these movements are be-
ing sensed and causing the servos to move the controls to counter these movements. Set the model down on the gear out of the wind and most of the noise stops. This is part of the reason that all four ser- vos on this model are the discreet SPM- SA2030L servos. There are two on the bot- tom of the wing; one for each aileron much like the setup on my E-flite Cap 232, which is a big improvement over the single linear servo with bellcrank and slots for the aileron control rods like those on the Sukhoi. The additional servo means a very tight, slop free control linkage for the ailerons. Gone also are the surface mounted linear
servos for the rudder and the elevator on the receiver board with this model. The servos are the same SPMSA2030L discreet linear
Parameter Wing span
Length Wing area
Total flying weight Battery weight Power
Scale factor
Micro Aerobatic Comparison: Sukhoi versus Sbach Sukhoi 26M (PKZ3580) 15.75 inches
14.3 inches
45 square inches 35.0 grams 3.6 grams
4.9 Watts max .0513 (about 1⁄20)
16.6 inches
65 square inches 75 grams
12.5 grams
19.5 Watts max .0576 (about 1⁄17)
53
Sbach 342 3D (EFLU4950) 17 inches
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