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Q2 Plans Chapter 11 Page 11-04

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Category: Q-2/Q-200 Plans
Published: Saturday, 20 May 2006 09:05
Written by Quickie Aircraft Corporation
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..... Next, study the sketches carefully to understand the routing and function of the brake cable. Depressing the toe brake (Q2BSWl) pulls the cable, which travels around!the pulley attached to BS2 and through a short piece of Nylaflow tubing to a second pulley cantilevered off the shear web of the canard. From there it travels outboard through the Nylaflow tubing buried in the elevator slot foam core.
.....BS3 is a plywood block bonded to the canard in order to cantilever that second pulley. The plywood should be bonded to the canard with flox and 2 BID.
.....Strive for straight line travel on all cable runs where practical to avoid unnecessary friction and wear.





..... On the canard shear web at each wheel pant, there is another AN210-1A pulley to change the direction of the brake cable so that the cable will have a straight pull on the brake arm.
.....Use a piece of 0.063" thick aluminum one inch square and drill a hole in the center for an AN3 bolt, and then rivet a nutplate to the aluminum so that the bolt can pass through the aluminum into the nutplate. Assemble the pulley combination as shown. Next, trial fit the assembly against the canard shear web, removing foam and the canard shear web glass as necessary so that the cable will not be pulling off at an angle. When satisfied, remove the pulley and bolt, protect the nutplate hole with silicone, and mount the aluminum/nutplate assembly to the shear web with flox. Use 2 BID with a minimum of 111 overlap onto the canard shear web to secure the aluminum/nutplate combination to the shear web. Once the glass has cured, open up the hole and assemble the pulley combination again.
.....All pullies must have cable guards to prevent the cable form slipping off the pulley and fouling the system. A sample sketch of a pulley guard is included for your reference; they should fit as closely as possible to the outside diameter of the pulley.


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