Q1 Plans Chapter 15 Page 15-8

Details

Category: Quickie Plans

Published: Monday, 12 May 2008 10:28

Written by Jun Su

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CANOPY PINS

In order to increase the stiffness of the fuselage with the canopy closed, two pins, one at the front of the canopy and one at the back of the canopy, are permanently mounted to the left side canopy stiffener and rest in a hole in the longeron when the canopy is closed, thus providing some extra rigidity for lateral flexing of the fuselage.

Begin by cutting two AN3-12A bolts, then cutting off the shanks (the threaded portion), and then rounding one end of each. At the forward and aft end of the left side canopy stiffener, drill a hole and permanently mount the cut off bolt with flox.

Next, mark where the bolt intersects the longeron as the canopy is closed. Drill a 5/16” hole there and fill the hole with flox. After the hole full of flox has cured, drill it out so that the bolt will slide in. Repeat this procedure for both bolts.

INSTALLING THE FORWARD COCKPIT COVER

Once the canopy has been installed on the aircraft, the forward cockpit cover which is not part of the canopy frame can be permanently attached to the fuselage. Use two BID tapes on each side and two BID tapes at the firewall. It is necessary only to do this on the outside of the fuselage.

SECONDARY CANOPY LATCH

Failing to securely latch the canopy before takeoff will probably cause it to open in flight. The flight characteristics of a Quickie with the canopy open are unknown; however, it is potentially a very dangerous situation and could result in the aircraft becoming very difficult to fly.

For that reason, these plans reflect a secondary canopy latch similar to an auto hood latch. Make sure that you install it, even though you probably think,”it won’t happen to me.”

This secondary latch catches the canopy in case you forget to latch it. To open the canopy, raise it 2” then push in on the stainless piece, then open.

The AN509-10R10 screws are installed through the plywood insert that you put into the left cockpit stiffener prior to glassing at 27” forward of the aft end of the stiffener. This location is in front of the canopy latch and should not interfere with its moiement.

CANOPY RETENTION CABLE

In order to retain the canopy in the open position, as well as to prevent damage to it if the wiLld catches it and throws it open while taxiing, a canopy retention cable and piece of shock cord is used. The sketches show you how to install it. The cable is attached to the longeron and the instrument panel bulkhead. The cable should be long enough so that the canopy can open far enough so that it will stay open with tension against the shock cord. (Canopy almost 90°)