Subject: First flights
From: rotaryeng
Date: 1/7/2013, 10:09 PM
To: AAAA-rotaryeng


Just reached 25 hours into the test flight period. Rock solid.
  Now to get the 1 rotor mounted and vetted for the beta prototype.
  On the ground it is 16 deg. F under the inversion.
  Up at 7000 feet it is 36 deg. Almost tolerable.

  Chris Cosman

  Congratulations Chris. It is a real cute airplane.

  Paul Lamar

Great airplane!: Regarding the V tail, I guess the most popular use
of this arrangement was in a Beechcraft airplane (Bonanza?) the
upside down version, with the V not as a Vee, but as an A, may have
the advantage of inducing roll in the right sense, while the V tail
induces roll in the opposite sense of turn.

I've always wanted considering an airplane with a Canard
configuration (Tail first as in the 14 bis by Santos Dumont, the
Curtiss Ascender and the North American B-70 Walkyrie) that offers
additional lift, while the usual arrangement of tail in the rear
part of airplane produces no lift, or even a force down.

It was supposed that this arrangement has the added advantage of the
canard surface stalling first, then blocking the main wing
approaching an stalling incidence, as it usually has a higher
incidence or angle of attack than the main wing, but some discuss
this, and a recent article in Flying, October 2012, about an
accident in a Rutan Canard that lost suddenly power because of a
broken propeller, that ended in the pilot killed, seems having been
worsened by the pilot pulling back the stick, instead of pushing it
down to gain airspeed and attempt some emergency landing, the Canard
entered a flat stall and precipitated to the ground at high speed,
but in a flat attitude.

There's an old article in Flight International, entitled: "Canards, design
with care", (Free and open access in their website) dealing with the
subject of foreplanes, and a very old article in the french
"Aviation magazine", about the Saab Viggen, points that the best
arrangement in canard airplanes would be a tail unit placed in an
upper position respect to the main wing, it can be in the upper
section of fuselaje, or immediately after the pilot's cabin, and the
wing placed in a low position, in the inferior rear part of fuselage.

Don't know much about the Piaggio canard private transport airplane,
besides that they sold few, and are or were buying back those still
flying in order not to continue having a legal obligation to
maintain an stock of spare parts for repairs.

The concept of a Canard surface of the A or inverted Vee type,
placed in the upper part of the airplane, with a wing surface in the
inferior part always looked to me as interesting, and if somebody
has the computing power and software to make a simulation of the
flight characteristics of an airplane arranged this way, I'll
greatly appreciate knowing any results, or simply having comments,
oppinions or discussions on the subject.
t.

Thank you for your kind attention.

Have a nice week, best regards, salut +

Jose Gros-Aymerich
Madrid, Spain.



Piaggio are still producing and selling airplanes. They are not Canards but
three surface. It was Beech that bought back the Starships.

Dale Davies

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