since my F-18v3 already had a lot of repairs and was gaining weight, something new had to be built - the EFv5. i chose it, because i wanted a delta wing again, since the RCPowers X-31 was so great to fly.
overall weight including components, exclusive the Lipo is 365 grams (with a 3S 1800mAh Zippy Lipo its 530g) - what a lightweight! Motor ist the HK 2200kV
note, that i did small modifications in order to fit a 7x4 prop (due to noise abatement). This induced the following adjusments, beside increasing the prop slot width:
i tried to do a lot of details like edge rounding/bevelling, adding leading edge slats. The ailerons/elevons have been slightly increased in size (width and length).
- shift the engine nothces slightly outwards
- in order to compensate the loss of wing area, the wings have been enlarged by about 1/2 inch in width. the main wing was also enlarged towards the front by some extend - note the gap between the "canards" and the main wing is a bit shorter than on the original plans
expectations have been very high for the maiden. but maiden was a bit staggering. why?...
- bigger prop was not quieter than the 6x4. i guess the airplane is not quite solid in the area of the prop slot and it sounded like some resonance was created by the wingplate/frame
- flight behaviour was not as expected. roll rate was not that fast and it was little bit a torque roll. making a turn was quite different than my F-18v3, Tucano, FRCF F-16mk1. just bank and yank was not enough for the turn, i had to apply pitch in order to turn. the behaviour of the rudder was also strange. when applied, the plane was not just yawing, it was flipping over instead.
unfortunately that was the first time i was disappointed with an RCP plan(e). also because i invested a lot of time for making the details (bevelling, painting,...).