Paul My friend Fred who building the twin with me forgot to lower
his landing gear on his Velocity XLRG during a precotional landing
practice in Pahookee Fl 3 months ago ,and try to overshoot but he
was to close of the runway and the prop hit the runway surface and
the lower part of the firewall and still flying to the grass on the
left side and hit so hard the fuselage was a complete scrap. Fred as
been to the hospital with his instructor for over a month and he had
spine injury, he is walking now with a body scan and he does lot of
therapy every day . Fred is recuperating very well I check for wings
and their seems fixable if the spar is not broken which I have the
feeling it still in good shape, the strake fuel cell still good and
canard is fixable and I will need less surface. I changed my design
and we will reuse as much as we can from the Velocity for the twin
construction plus the wing will be extended 24" each side and adding
flaps and slats. I did a schematic wiring diagram as we will add to
the gear system to prevent the same mistake. I am at the stage of
extending my garage of 25ft plus an outside concrete slab 12'by 35'
and should be completed in a few months. I will start the twin
construction after then. I am following all your developments on the
rotary every day.


JEAN PRUDHOMME

Bonjour: The Swedish put the canard foreplane in their Viggen above
the level of main wing, the same applies for the French Rafale and
the Eurofighter, and to the new Saab Grippen, I have no idea about
how many airplanes with a canard surface have the foreplane in the
same level or below the level of the main wing; according to the
attached images from the French 'Aviation Magazine', better results
are obtained if the Canard plane is above the main wing plane.

I guess also that an arrangement as in the Curtiss P-55 Ascender,
with the foreplane angle of attack having the possibility of changing
from 0º to +/- 90º, and the foreplane including also elevons, may
help theoretically avoiding the accident of a 'Velocity' canard
airplane described in 'Flying', Oct 2012, page 36, when a blade of
the pusher propeller broke, and the pilot pulled the stick instead of
what he should have done, pushing it to have the plane diving and
gaining airspeed.

As discussed, there's a quite detailed article about basic
calculations in canards: 'Canards, design with care', by Robert
Burns, in the magazine 'Flight', around February 1981 or 1982, back
issues are of free download in the 'Flight' website.

If the foreplane has a sufficient negative dihedral, as in the
Rafale, Grippen and Eurofigher cited, the induced rolling would be in
the right direction when the 'A' shaped canard acts as rudder.

Hope you like this. Have a good week. Best regards. Salut † Jose
Gros-Aymerich Madrid, Spain

Hi Jose
This is my intention to install the canard above the main wing for more clearance
for the front gear retraction, I did a complete new composite design for the front gear.


JEAN PRUDHOMME INSP,



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