Hello Wahid,

Here are some facts and dimensions I believe you're after:
Rotor Diameter 56 inches, 2 inch cord, flat bottom clark Y airfoil.
Aircraft weight is 5 lbs. 2 oz.
Engine OS LA .40 with 4 degrees down thrust and a 10/6 prop.
Aft tilt ten degrees.
Fuselage length 30 inches from top of firewall to aft end of horizontal stabilizer (not including elevator).
Fuselage height 6 inches at tallest point behind pilot.
Horizontal stabilizer cord 7.5 inches
Horizontal stabilizer lenght 18 inches.Made from 3/16" balsa.
Vertical stabilizer is 3 5/8" high above horizontal stab and 13 1/2" long from fwd, end to aft end of rudder.
The strake below the fuselage is 1 1/2" tall at the highest point.
The rotor hub plate is 10 1/2" above the top of the fuselage in front of the pilot.
the landing gear spread is 17 1/4" and 6" tall