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"Every pilot needs of his wing " this is the philosophy with which the GRIF develops his projects.
The COACH is the first wing mono surface produced by the GRIF, the most pressing application for this type of wings it derives from our dealer USA, in that market kind in sight of the publication of the norms concerning the Sport Pilot, he is having a notable increase of interest towards the great trikes and of the various versions hydro of the same ones, the application of the market USA is given by the demand to have easy wings to pilot and not necessarily fast, in short something that allows to be in air in simple and effective way.
The prototype has been developed departing from the loom of the TR, almost maintaining an unchanged sail plan with the alone difference to remove the double surface and to leave therefore the cross in sight.
The performances found by this wing are comparable to those of the TR, in comparison to the wing of departure, least speeds are slightly found only inferior, while the mottos are sensitively decreased, increases him resistance given from the cross-cafe in sight and the mono surface, they shorten the necessary spaces to brakes after the landing.
From this first wing then the definitive Coach has been developed, wing with less than 18 mq than surface.

As our custom, in the project, the attention has also been turned to the aesthetical aspect of the wing, the used components they are those known and perfectly tested in over 10 years of production and that by now they countersign the style GRIF.
The loom has been realized in AVIONAL 2017 and the sticks of the sail in ERGAL 7075 all the plates and the mechanical parts they are realized in AVIONAL 2024, Aluminum 3571 and Acciaio INOX, according to their employment.
All The pieces have been projected for their mechanical job, but it have been kept in mind also the aesthetical factor, an example they are the particular ones of the triangle of guide whose heads have the same form of the aerodynamic profile of the uppercut.
They are realized in great centers of job endowed with cars numerical control utensils.
For the sail we use the products of the POLYANT, the edge of attack is realized both in TRYLAM and in DACRON, but the estradosso and the double surface are realized only in DACRON strengthened in the points of great effort.