- 26 May 2006
- Reaction score
Jemiba said:Good find Hesham !
Such a modification didn't remain a project, as can be seen in the
photo of SA 330Z, but in a different form, not with a high set
fenestron and a V-tail.
(from Minidocavia N°9)
From Aviation magazine 1975.
I was once told (I think it was during mechanical type rating on EC135) that the Fenestron itself is rather heavy and helicopter which were not designed with it in mind since the beginning, but altered to incorporate the Fenestron (like EC135 vs. Bo108, or EC145T2 vs. Ec145/Bk117), they are usually tail-heavy. Not to mention that Fenestron itself has smaller diameter that the tail rotor - and even that the ducting bit should help, it seems to not help as much to make it equal to open tail rotor. So in the hover it sucks a bit more power than classic tail rotor. At the speed, there is no problem as it is solved aerodynamically - the entire vertical fin hiding the Fenestron counteracts the rotor torque.More seriously - why did they dropped it ? can't see any on Super Puma / EC-725 ? "law of diminishing returns", not worth it at larger scale ?