WMAC Group build - Impressivo

A little more feedback from testing yesterday, where I managed 5.01 flights.

The first flight was the 0.01! I had trimmed it after the initial flight during the week and did not add back in the 1mm up elevator. That was a mistake, because the model hit the ground and sheared the blades off the prop. It carried on running for a while but the vibration then sheared one of the motor cables where the connector is soldered. These cables are very stiff and long and closer inspection shows that it had work-hardened prior to shearing, so would have gone one day anyway. Lessons learned:

• always launch with +1mm
• shorten the motor wires and/or be careful not to bend them too much where the connector is soldered

The forecast was not too good so I called it a day until 1pm when it looked like it might stay flyable, so I went home and re-soldered the connector and got back to Cashmoor by 2pm. Five more uneventful flights with different props. There is not a lot of difference between the 5.5x4.5, 5x5 and 4.75x4.75. The 5.25x4.75 was on the midweek maiden flight and was the one that broke today. This also had very similar performance. I also tried the 4.7x4.2 which was definitely a little slower and would probable be the best choice for formation flying.

As for the flight performance, all I can say is wow! The speed compared to the Twinjet (and Phil's x-wing) is like chalk and cheese. At full power it appears to climb vertically without any loss of speed and gets small very quickly. The conditions were very windy by the end of the day and the Impressivo cut through it very cleanly. One or two landings were less than perfect, due to the turbulence, of course! One prop broke on landing, so make sure you have a few spares to keep you going.

Well I have been busy this weekend with the covering but unfortunately off to Saudi working again so the final touches will have to wait till I return, I hope the skittle night is enjoyable and hoping to see lots of pictures of all the impressivos from the night! You are all lucky I'm not there because I'd smash the competition lol

Prepare for the invasion......

By the way, has everyone just used covering as the hinges for the ailerons? And what size servos? Anyone brought cheap from hobbyking?

Yes, quite a few of us have used the covering for hinges. I covered the bottom of the wing and the aileron first. Then taped the aileron in place using diamond tape on the bottom. Then covered the top of the wing including aileron in one piece.

I used New Power XLD-17MB Digital Servos which I got from Phoenix Model Products. Cost £10.95 each.

Mike

MikeSeale wrote: Yes, quite a few of us have used the covering for hinges. I covered the bottom of the wing and the aileron first. Then taped the aileron in place using diamond tape on the bottom. Then covered the top of the wing including aileron in one piece.
Mike

Dave, follow as per Mike BUT when covering top of wing lay it down with aileron in the flopped down position, about 45degrees. If you don't the aileron will unable to flex down.

Yep one of the best ways of hinging surfaces. I have used this method using 3 layers of film on a 42% cap 232,it also seals the gap on the surface